[1350] | 1 | // |
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| 2 | // ******************************************************************** |
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| 3 | // * License and Disclaimer * |
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| 4 | // * * |
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| 5 | // * The Geant4 software is copyright of the Copyright Holders of * |
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| 6 | // * the Geant4 Collaboration. It is provided under the terms and * |
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| 7 | // * conditions of the Geant4 Software License, included in the file * |
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| 8 | // * LICENSE and available at http://cern.ch/geant4/license . These * |
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| 9 | // * include a list of copyright holders. * |
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| 10 | // * * |
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| 11 | // * Neither the authors of this software system, nor their employing * |
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| 12 | // * institutes,nor the agencies providing financial support for this * |
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| 13 | // * work make any representation or warranty, express or implied, * |
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| 14 | // * regarding this software system or assume any liability for its * |
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| 15 | // * use. Please see the license in the file LICENSE and URL above * |
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| 16 | // * for the full disclaimer and the limitation of liability. * |
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| 17 | // * * |
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| 18 | // * This code implementation is the result of the scientific and * |
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| 19 | // * technical work of the GEANT4 collaboration. * |
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| 20 | // * By using, copying, modifying or distributing the software (or * |
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| 21 | // * any work based on the software) you agree to acknowledge its * |
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| 22 | // * use in resulting scientific publications, and indicate your * |
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| 23 | // * acceptance of all terms of the Geant4 Software license. * |
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| 24 | // ******************************************************************** |
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| 25 | // |
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| 26 | #ifdef G4VIS_BUILD_OPENGL_DRIVER |
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| 27 | #define G4VIS_BUILD_OPENGL_GL2PS |
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| 28 | #endif |
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| 29 | #ifdef G4VIS_BUILD_OI_DRIVER |
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| 30 | #define G4VIS_BUILD_OPENGL_GL2PS |
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| 31 | #endif |
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| 32 | |
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| 33 | #ifdef G4VIS_BUILD_OPENGL_GL2PS |
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| 34 | |
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| 35 | /* |
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| 36 | * GL2PS, an OpenGL to PostScript Printing Library |
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| 37 | * Copyright (C) 1999-2009 C. Geuzaine |
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| 38 | * |
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| 39 | * This program is free software; you can redistribute it and/or |
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| 40 | * modify it under the terms of either: |
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| 41 | * |
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| 42 | * a) the GNU Library General Public License as published by the Free |
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| 43 | * Software Foundation, either version 2 of the License, or (at your |
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| 44 | * option) any later version; or |
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| 45 | * |
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| 46 | * b) the GL2PS License as published by Christophe Geuzaine, either |
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| 47 | * version 2 of the License, or (at your option) any later version. |
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| 48 | * |
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| 49 | * This program is distributed in the hope that it will be useful, but |
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| 50 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 51 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See either |
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| 52 | * the GNU Library General Public License or the GL2PS License for |
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| 53 | * more details. |
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| 54 | * |
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| 55 | * You should have received a copy of the GNU Library General Public |
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| 56 | * License along with this library in the file named "COPYING.LGPL"; |
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| 57 | * if not, write to the Free Software Foundation, Inc., 675 Mass Ave, |
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| 58 | * Cambridge, MA 02139, USA. |
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| 59 | * |
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| 60 | * You should have received a copy of the GL2PS License with this |
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| 61 | * library in the file named "COPYING.GL2PS"; if not, I will be glad |
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| 62 | * to provide one. |
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| 63 | * |
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| 64 | * Contributors: |
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| 65 | * Michael Sweet <mike@easysw.com> |
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| 66 | * Marc Ume <marc.ume@digitalgraphics.be> |
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| 67 | * Jean-Francois Remacle <remacle@gce.ucl.ac.be> |
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| 68 | * Bart Kaptein <B.L.Kaptein@lumc.nl> |
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| 69 | * Quy Nguyen-Dai <quy@nguyendai.org> |
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| 70 | * Sam Buss <sbuss@ucsd.edu> |
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| 71 | * Shane Hill <Shane.Hill@dsto.defence.gov.au> |
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| 72 | * Romain Boman <r_boman@yahoo.fr> |
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| 73 | * Rouben Rostamian <rostamian@umbc.edu> |
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| 74 | * Diego Santa Cruz <Diego.SantaCruz@epfl.ch> |
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| 75 | * Shahzad Muzaffar <Shahzad.Muzaffar@cern.ch> |
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| 76 | * Lassi Tuura <lassi.tuura@cern.ch> |
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| 77 | * Guy Barrand <barrand@lal.in2p3.fr> |
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| 78 | * Prabhu Ramachandran <prabhu@aero.iitm.ernet.in> |
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| 79 | * Micha Bieber <bieber@traits.de> |
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| 80 | * Olivier Couet <couet@mail.cern.ch> |
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| 81 | * Shai Ayal <shaiay@gmail.com> |
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| 82 | * Fabian Wenzel <wenzel@tu-harburg.de> |
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| 83 | * Ian D. Gay <gay@sfu.ca> |
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| 84 | * Cosmin Truta <cosmin@cs.toronto.edu> |
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| 85 | * Baiju Devani <b.devani@gmail.com> |
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| 86 | * Alexander Danilov <danilov@lanl.gov> |
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| 87 | * |
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| 88 | * For the latest info about gl2ps, see http://www.geuz.org/gl2ps/. |
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| 89 | * Please report all bugs and problems to <gl2ps@geuz.org>. |
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| 90 | */ |
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| 91 | |
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| 92 | #include "Geant4_gl2ps.h" |
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| 93 | |
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| 94 | #include <cmath> |
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| 95 | #include <string.h> |
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| 96 | #include <sys/types.h> |
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| 97 | #include <stdarg.h> |
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| 98 | #include <time.h> |
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| 99 | #include <float.h> |
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| 100 | |
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| 101 | #define GL2PS_HAVE_ZLIB |
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| 102 | #include <zlib.h> |
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| 103 | |
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| 104 | #if defined(GL2PS_HAVE_LIBPNG) |
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| 105 | #include <png.h> |
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| 106 | #endif |
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| 107 | |
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| 108 | /********************************************************************* |
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| 109 | * |
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| 110 | * Private definitions, data structures and prototypes |
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| 111 | * |
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| 112 | *********************************************************************/ |
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| 113 | |
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| 114 | /* Magic numbers (assuming that the order of magnitude of window |
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| 115 | coordinates is 10^3) */ |
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| 116 | |
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| 117 | #define GL2PS_EPSILON 5.0e-3F |
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| 118 | #define GL2PS_ZSCALE 1000.0F |
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| 119 | #define GL2PS_ZOFFSET 5.0e-2F |
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| 120 | #define GL2PS_ZOFFSET_LARGE 20.0F |
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| 121 | #define GL2PS_ZERO(arg) (std::fabs(arg) < 1.e-20) |
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| 122 | |
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| 123 | /* Primitive types */ |
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| 124 | |
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| 125 | #define GL2PS_NO_TYPE -1 |
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| 126 | #define GL2PS_TEXT 1 |
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| 127 | #define GL2PS_POINT 2 |
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| 128 | #define GL2PS_LINE 3 |
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| 129 | #define GL2PS_QUADRANGLE 4 |
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| 130 | #define GL2PS_TRIANGLE 5 |
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| 131 | #define GL2PS_PIXMAP 6 |
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| 132 | #define GL2PS_IMAGEMAP 7 |
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| 133 | #define GL2PS_IMAGEMAP_WRITTEN 8 |
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| 134 | #define GL2PS_IMAGEMAP_VISIBLE 9 |
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| 135 | #define GL2PS_SPECIAL 10 |
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| 136 | |
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| 137 | /* BSP tree primitive comparison */ |
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| 138 | |
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| 139 | #define GL2PS_COINCIDENT 1 |
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| 140 | #define GL2PS_IN_FRONT_OF 2 |
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| 141 | #define GL2PS_IN_BACK_OF 3 |
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| 142 | #define GL2PS_SPANNING 4 |
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| 143 | |
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| 144 | /* 2D BSP tree primitive comparison */ |
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| 145 | |
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| 146 | #define GL2PS_POINT_COINCIDENT 0 |
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| 147 | #define GL2PS_POINT_INFRONT 1 |
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| 148 | #define GL2PS_POINT_BACK 2 |
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| 149 | |
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| 150 | /* Internal feedback buffer pass-through tokens */ |
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| 151 | |
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| 152 | #define GL2PS_BEGIN_OFFSET_TOKEN 1 |
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| 153 | #define GL2PS_END_OFFSET_TOKEN 2 |
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| 154 | #define GL2PS_BEGIN_BOUNDARY_TOKEN 3 |
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| 155 | #define GL2PS_END_BOUNDARY_TOKEN 4 |
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| 156 | #define GL2PS_BEGIN_STIPPLE_TOKEN 5 |
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| 157 | #define GL2PS_END_STIPPLE_TOKEN 6 |
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| 158 | #define GL2PS_POINT_SIZE_TOKEN 7 |
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| 159 | #define GL2PS_LINE_WIDTH_TOKEN 8 |
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| 160 | #define GL2PS_BEGIN_BLEND_TOKEN 9 |
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| 161 | #define GL2PS_END_BLEND_TOKEN 10 |
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| 162 | #define GL2PS_SRC_BLEND_TOKEN 11 |
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| 163 | #define GL2PS_DST_BLEND_TOKEN 12 |
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| 164 | #define GL2PS_IMAGEMAP_TOKEN 13 |
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| 165 | #define GL2PS_DRAW_PIXELS_TOKEN 14 |
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| 166 | #define GL2PS_TEXT_TOKEN 15 |
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| 167 | |
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| 168 | typedef enum { |
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| 169 | T_UNDEFINED = -1, |
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| 170 | T_CONST_COLOR = 1, |
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| 171 | T_VAR_COLOR = 1<<1, |
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| 172 | T_ALPHA_1 = 1<<2, |
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| 173 | T_ALPHA_LESS_1 = 1<<3, |
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| 174 | T_VAR_ALPHA = 1<<4 |
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| 175 | } GL2PS_TRIANGLE_PROPERTY; |
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| 176 | |
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| 177 | typedef GLfloat GL2PSxyz[3]; |
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| 178 | typedef GLfloat GL2PSplane[4]; |
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| 179 | |
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| 180 | typedef struct _GL2PSbsptree2d GL2PSbsptree2d; |
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| 181 | |
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| 182 | struct _GL2PSbsptree2d { |
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| 183 | GL2PSplane plane; |
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| 184 | GL2PSbsptree2d *front, *back; |
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| 185 | }; |
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| 186 | |
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| 187 | typedef struct { |
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| 188 | GLint nmax, size, incr, n; |
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| 189 | char *array; |
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| 190 | } GL2PSlist; |
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| 191 | |
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| 192 | typedef struct _GL2PSbsptree GL2PSbsptree; |
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| 193 | |
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| 194 | struct _GL2PSbsptree { |
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| 195 | GL2PSplane plane; |
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| 196 | GL2PSlist *primitives; |
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| 197 | GL2PSbsptree *front, *back; |
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| 198 | }; |
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| 199 | |
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| 200 | typedef struct { |
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| 201 | GL2PSxyz xyz; |
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| 202 | GL2PSrgba rgba; |
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| 203 | } GL2PSvertex; |
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| 204 | |
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| 205 | typedef struct { |
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| 206 | GL2PSvertex vertex[3]; |
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| 207 | int prop; |
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| 208 | } GL2PStriangle; |
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| 209 | |
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| 210 | typedef struct { |
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| 211 | GLshort fontsize; |
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| 212 | char *str, *fontname; |
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| 213 | /* Note: for a 'special' string, 'alignment' holds the format |
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| 214 | (PostScript, PDF, etc.) of the special string */ |
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| 215 | GLint alignment; |
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| 216 | GLfloat angle; |
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| 217 | } GL2PSstring; |
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| 218 | |
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| 219 | typedef struct { |
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| 220 | GLsizei width, height; |
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| 221 | /* Note: for an imagemap, 'type' indicates if it has already been |
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| 222 | written to the file or not, and 'format' indicates if it is |
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| 223 | visible or not */ |
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| 224 | GLenum format, type; |
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| 225 | GLfloat *pixels; |
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| 226 | } GL2PSimage; |
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| 227 | |
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| 228 | typedef struct _GL2PSimagemap GL2PSimagemap; |
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| 229 | |
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| 230 | struct _GL2PSimagemap { |
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| 231 | GL2PSimage *image; |
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| 232 | GL2PSimagemap *next; |
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| 233 | }; |
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| 234 | |
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| 235 | typedef struct { |
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| 236 | GLshort type, numverts; |
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| 237 | GLushort pattern; |
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| 238 | char boundary, offset, culled; |
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| 239 | GLint factor; |
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| 240 | GLfloat width; |
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| 241 | GL2PSvertex *verts; |
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| 242 | union { |
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| 243 | GL2PSstring *text; |
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| 244 | GL2PSimage *image; |
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| 245 | } data; |
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| 246 | } GL2PSprimitive; |
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| 247 | |
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| 248 | typedef struct { |
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| 249 | #if defined(GL2PS_HAVE_ZLIB) |
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| 250 | Bytef *dest, *src, *start; |
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| 251 | uLongf destLen, srcLen; |
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| 252 | #else |
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| 253 | int dummy; |
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| 254 | #endif |
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| 255 | } GL2PScompress; |
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| 256 | |
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| 257 | typedef struct{ |
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| 258 | GL2PSlist* ptrlist; |
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| 259 | int gsno, fontno, imno, shno, maskshno, trgroupno; |
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| 260 | int gsobjno, fontobjno, imobjno, shobjno, maskshobjno, trgroupobjno; |
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| 261 | } GL2PSpdfgroup; |
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| 262 | |
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| 263 | typedef struct { |
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| 264 | /* General */ |
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| 265 | GLint format, sort, options, colorsize, colormode, buffersize; |
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| 266 | char *title, *producer, *filename; |
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| 267 | GLboolean boundary, blending; |
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| 268 | GLfloat *feedback, offset[2], lastlinewidth; |
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| 269 | GLint viewport[4], blendfunc[2], lastfactor; |
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| 270 | GL2PSrgba *colormap, lastrgba, threshold, bgcolor; |
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| 271 | GLushort lastpattern; |
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| 272 | GL2PSvertex lastvertex; |
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| 273 | GL2PSlist *primitives, *auxprimitives; |
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| 274 | FILE *stream; |
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| 275 | GL2PScompress *compress; |
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| 276 | GLboolean header; |
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| 277 | |
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| 278 | /* BSP-specific */ |
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| 279 | GLint maxbestroot; |
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| 280 | |
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| 281 | /* Occlusion culling-specific */ |
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| 282 | GLboolean zerosurfacearea; |
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| 283 | GL2PSbsptree2d *imagetree; |
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| 284 | GL2PSprimitive *primitivetoadd; |
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| 285 | |
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| 286 | /* PDF-specific */ |
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| 287 | int streamlength; |
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| 288 | GL2PSlist *pdfprimlist, *pdfgrouplist; |
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| 289 | int *xreflist; |
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| 290 | int objects_stack; /* available objects */ |
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| 291 | int extgs_stack; /* graphics state object number */ |
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| 292 | int font_stack; /* font object number */ |
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| 293 | int im_stack; /* image object number */ |
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| 294 | int trgroupobjects_stack; /* xobject numbers */ |
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| 295 | int shader_stack; /* shader object numbers */ |
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| 296 | int mshader_stack; /* mask shader object numbers */ |
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| 297 | |
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| 298 | /* for image map list */ |
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| 299 | GL2PSimagemap *imagemap_head; |
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| 300 | GL2PSimagemap *imagemap_tail; |
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| 301 | } GL2PScontext; |
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| 302 | |
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| 303 | typedef struct { |
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| 304 | void (*printHeader)(void); |
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| 305 | void (*printFooter)(void); |
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| 306 | void (*beginViewport)(GLint viewport[4]); |
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| 307 | GLint (*endViewport)(void); |
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| 308 | void (*printPrimitive)(void *data); |
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| 309 | void (*printFinalPrimitive)(void); |
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| 310 | const char *file_extension; |
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| 311 | const char *description; |
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| 312 | } GL2PSbackend; |
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| 313 | |
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| 314 | /* The gl2ps context. gl2ps is not thread safe (we should create a |
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| 315 | local GL2PScontext during gl2psBeginPage) */ |
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| 316 | |
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| 317 | static GL2PScontext *gl2ps = NULL; |
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| 318 | |
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| 319 | /* Need to forward-declare this one */ |
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| 320 | |
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| 321 | static GLint gl2psPrintPrimitives(void); |
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| 322 | |
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| 323 | /********************************************************************* |
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| 324 | * |
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| 325 | * Utility routines |
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| 326 | * |
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| 327 | *********************************************************************/ |
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| 328 | |
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| 329 | static void gl2psMsg(GLint level, const char *fmt, ...) |
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| 330 | { |
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| 331 | va_list args; |
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| 332 | |
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| 333 | if(!(gl2ps->options & GL2PS_SILENT)){ |
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| 334 | switch(level){ |
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| 335 | case GL2PS_INFO : fprintf(stderr, "GL2PS info: "); break; |
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| 336 | case GL2PS_WARNING : fprintf(stderr, "GL2PS warning: "); break; |
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| 337 | case GL2PS_ERROR : fprintf(stderr, "GL2PS error: "); break; |
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| 338 | } |
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| 339 | va_start(args, fmt); |
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| 340 | vfprintf(stderr, fmt, args); |
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| 341 | va_end(args); |
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| 342 | fprintf(stderr, "\n"); |
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| 343 | } |
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| 344 | /* if(level == GL2PS_ERROR) exit(1); */ |
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| 345 | } |
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| 346 | |
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| 347 | static void *gl2psMalloc(size_t size) |
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| 348 | { |
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| 349 | void *ptr; |
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| 350 | |
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| 351 | if(!size) return(NULL); |
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| 352 | ptr = malloc(size); |
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| 353 | if(!ptr){ |
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| 354 | gl2psMsg(GL2PS_ERROR, "Couldn't allocate requested memory"); |
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| 355 | exit(1); |
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| 356 | } |
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| 357 | return(ptr); |
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| 358 | } |
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| 359 | |
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| 360 | static void *gl2psRealloc(void *ptr, size_t size) |
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| 361 | { |
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| 362 | if(!size) return(NULL); |
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| 363 | ptr = realloc(ptr, size); |
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| 364 | if(!ptr){ |
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| 365 | gl2psMsg(GL2PS_ERROR, "Couldn't reallocate requested memory"); |
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| 366 | exit(1); |
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| 367 | } |
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| 368 | return(ptr); |
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| 369 | } |
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| 370 | |
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| 371 | static void gl2psFree(void *ptr) |
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| 372 | { |
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| 373 | if(!ptr) return; |
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| 374 | free(ptr); |
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| 375 | } |
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| 376 | |
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| 377 | static size_t gl2psWriteBigEndian(unsigned long data, size_t bytes) |
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| 378 | { |
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| 379 | size_t i; |
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| 380 | size_t size = sizeof(unsigned long); |
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| 381 | for(i = 1; i <= bytes; ++i){ |
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| 382 | fputc(0xff & (data >> (size-i) * 8), gl2ps->stream); |
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| 383 | } |
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| 384 | return bytes; |
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| 385 | } |
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| 386 | |
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| 387 | /* zlib compression helper routines */ |
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| 388 | |
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| 389 | #if defined(GL2PS_HAVE_ZLIB) |
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| 390 | |
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| 391 | static void gl2psSetupCompress(void) |
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| 392 | { |
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| 393 | gl2ps->compress = (GL2PScompress*)gl2psMalloc(sizeof(GL2PScompress)); |
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| 394 | gl2ps->compress->src = NULL; |
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| 395 | gl2ps->compress->start = NULL; |
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| 396 | gl2ps->compress->dest = NULL; |
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| 397 | gl2ps->compress->srcLen = 0; |
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| 398 | gl2ps->compress->destLen = 0; |
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| 399 | } |
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| 400 | |
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| 401 | static void gl2psFreeCompress(void) |
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| 402 | { |
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| 403 | if(!gl2ps->compress) |
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| 404 | return; |
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| 405 | gl2psFree(gl2ps->compress->start); |
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| 406 | gl2psFree(gl2ps->compress->dest); |
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| 407 | gl2ps->compress->src = NULL; |
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| 408 | gl2ps->compress->start = NULL; |
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| 409 | gl2ps->compress->dest = NULL; |
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| 410 | gl2ps->compress->srcLen = 0; |
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| 411 | gl2ps->compress->destLen = 0; |
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| 412 | } |
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| 413 | |
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| 414 | static int gl2psAllocCompress(unsigned int srcsize) |
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| 415 | { |
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| 416 | gl2psFreeCompress(); |
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| 417 | |
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| 418 | if(!gl2ps->compress || !srcsize) |
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| 419 | return GL2PS_ERROR; |
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| 420 | |
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| 421 | gl2ps->compress->srcLen = srcsize; |
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| 422 | gl2ps->compress->destLen = (int)ceil(1.001 * gl2ps->compress->srcLen + 12); |
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| 423 | gl2ps->compress->src = (Bytef*)gl2psMalloc(gl2ps->compress->srcLen); |
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| 424 | gl2ps->compress->start = gl2ps->compress->src; |
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| 425 | gl2ps->compress->dest = (Bytef*)gl2psMalloc(gl2ps->compress->destLen); |
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| 426 | |
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| 427 | return GL2PS_SUCCESS; |
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| 428 | } |
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| 429 | |
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| 430 | static void *gl2psReallocCompress(unsigned int srcsize) |
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| 431 | { |
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| 432 | if(!gl2ps->compress || !srcsize) |
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| 433 | return NULL; |
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| 434 | |
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| 435 | if(srcsize < gl2ps->compress->srcLen) |
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| 436 | return gl2ps->compress->start; |
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| 437 | |
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| 438 | gl2ps->compress->srcLen = srcsize; |
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| 439 | gl2ps->compress->destLen = (int)ceil(1.001 * gl2ps->compress->srcLen + 12); |
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| 440 | gl2ps->compress->src = (Bytef*)gl2psRealloc(gl2ps->compress->src, |
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| 441 | gl2ps->compress->srcLen); |
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| 442 | gl2ps->compress->start = gl2ps->compress->src; |
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| 443 | gl2ps->compress->dest = (Bytef*)gl2psRealloc(gl2ps->compress->dest, |
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| 444 | gl2ps->compress->destLen); |
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| 445 | |
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| 446 | return gl2ps->compress->start; |
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| 447 | } |
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| 448 | |
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| 449 | static size_t gl2psWriteBigEndianCompress(unsigned long data, size_t bytes) |
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| 450 | { |
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| 451 | size_t i; |
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| 452 | size_t size = sizeof(unsigned long); |
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| 453 | for(i = 1; i <= bytes; ++i){ |
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| 454 | *gl2ps->compress->src = (Bytef)(0xff & (data >> (size-i) * 8)); |
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| 455 | ++gl2ps->compress->src; |
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| 456 | } |
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| 457 | return bytes; |
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| 458 | } |
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| 459 | |
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| 460 | static int gl2psDeflate(void) |
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| 461 | { |
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| 462 | /* For compatibility with older zlib versions, we use compress(...) |
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| 463 | instead of compress2(..., Z_BEST_COMPRESSION) */ |
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| 464 | return compress(gl2ps->compress->dest, &gl2ps->compress->destLen, |
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| 465 | gl2ps->compress->start, gl2ps->compress->srcLen); |
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| 466 | } |
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| 467 | |
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| 468 | #endif |
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| 469 | |
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| 470 | static int gl2psPrintf(const char* fmt, ...) |
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| 471 | { |
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| 472 | int ret; |
---|
| 473 | va_list args; |
---|
| 474 | |
---|
| 475 | #if defined(GL2PS_HAVE_ZLIB) |
---|
| 476 | unsigned int oldsize = 0; |
---|
| 477 | static char buf[1000]; |
---|
| 478 | if(gl2ps->options & GL2PS_COMPRESS){ |
---|
| 479 | va_start(args, fmt); |
---|
| 480 | ret = vsprintf(buf, fmt, args); |
---|
| 481 | va_end(args); |
---|
| 482 | oldsize = gl2ps->compress->srcLen; |
---|
| 483 | gl2ps->compress->start = (Bytef*)gl2psReallocCompress(oldsize + ret); |
---|
| 484 | memcpy(gl2ps->compress->start+oldsize, buf, ret); |
---|
| 485 | ret = 0; |
---|
| 486 | } |
---|
| 487 | else{ |
---|
| 488 | #endif |
---|
| 489 | va_start(args, fmt); |
---|
| 490 | ret = vfprintf(gl2ps->stream, fmt, args); |
---|
| 491 | va_end(args); |
---|
| 492 | #if defined(GL2PS_HAVE_ZLIB) |
---|
| 493 | } |
---|
| 494 | #endif |
---|
| 495 | return ret; |
---|
| 496 | } |
---|
| 497 | |
---|
| 498 | static void gl2psPrintGzipHeader() |
---|
| 499 | { |
---|
| 500 | #if defined(GL2PS_HAVE_ZLIB) |
---|
| 501 | char tmp[10] = {'\x1f', '\x8b', /* magic numbers: 0x1f, 0x8b */ |
---|
| 502 | 8, /* compression method: Z_DEFLATED */ |
---|
| 503 | 0, /* flags */ |
---|
| 504 | 0, 0, 0, 0, /* time */ |
---|
| 505 | 2, /* extra flags: max compression */ |
---|
| 506 | '\x03'}; /* OS code: 0x03 (Unix) */ |
---|
| 507 | |
---|
| 508 | if(gl2ps->options & GL2PS_COMPRESS){ |
---|
| 509 | gl2psSetupCompress(); |
---|
| 510 | /* add the gzip file header */ |
---|
| 511 | fwrite(tmp, 10, 1, gl2ps->stream); |
---|
| 512 | } |
---|
| 513 | #endif |
---|
| 514 | } |
---|
| 515 | |
---|
| 516 | static void gl2psPrintGzipFooter() |
---|
| 517 | { |
---|
| 518 | #if defined(GL2PS_HAVE_ZLIB) |
---|
| 519 | int n; |
---|
| 520 | uLong crc, len; |
---|
| 521 | char tmp[8]; |
---|
| 522 | |
---|
| 523 | if(gl2ps->options & GL2PS_COMPRESS){ |
---|
| 524 | if(Z_OK != gl2psDeflate()){ |
---|
| 525 | gl2psMsg(GL2PS_ERROR, "Zlib deflate error"); |
---|
| 526 | } |
---|
| 527 | else{ |
---|
| 528 | /* determine the length of the header in the zlib stream */ |
---|
| 529 | n = 2; /* CMF+FLG */ |
---|
| 530 | if(gl2ps->compress->dest[1] & (1<<5)){ |
---|
| 531 | n += 4; /* DICTID */ |
---|
| 532 | } |
---|
| 533 | /* write the data, without the zlib header and footer */ |
---|
| 534 | fwrite(gl2ps->compress->dest+n, gl2ps->compress->destLen-(n+4), |
---|
| 535 | 1, gl2ps->stream); |
---|
| 536 | /* add the gzip file footer */ |
---|
| 537 | crc = crc32(0L, gl2ps->compress->start, gl2ps->compress->srcLen); |
---|
| 538 | for(n = 0; n < 4; ++n){ |
---|
| 539 | tmp[n] = (char)(crc & 0xff); |
---|
| 540 | crc >>= 8; |
---|
| 541 | } |
---|
| 542 | len = gl2ps->compress->srcLen; |
---|
| 543 | for(n = 4; n < 8; ++n){ |
---|
| 544 | tmp[n] = (char)(len & 0xff); |
---|
| 545 | len >>= 8; |
---|
| 546 | } |
---|
| 547 | fwrite(tmp, 8, 1, gl2ps->stream); |
---|
| 548 | } |
---|
| 549 | gl2psFreeCompress(); |
---|
| 550 | gl2psFree(gl2ps->compress); |
---|
| 551 | gl2ps->compress = NULL; |
---|
| 552 | } |
---|
| 553 | #endif |
---|
| 554 | } |
---|
| 555 | |
---|
| 556 | /* The list handling routines */ |
---|
| 557 | |
---|
| 558 | static void gl2psListRealloc(GL2PSlist *list, GLint n) |
---|
| 559 | { |
---|
| 560 | if(!list){ |
---|
| 561 | gl2psMsg(GL2PS_ERROR, "Cannot reallocate NULL list"); |
---|
| 562 | return; |
---|
| 563 | } |
---|
| 564 | if(n <= 0) return; |
---|
| 565 | if(!list->array){ |
---|
| 566 | list->nmax = n; |
---|
| 567 | list->array = (char*)gl2psMalloc(list->nmax * list->size); |
---|
| 568 | } |
---|
| 569 | else{ |
---|
| 570 | if(n > list->nmax){ |
---|
| 571 | list->nmax = ((n - 1) / list->incr + 1) * list->incr; |
---|
| 572 | list->array = (char*)gl2psRealloc(list->array, |
---|
| 573 | list->nmax * list->size); |
---|
| 574 | } |
---|
| 575 | } |
---|
| 576 | } |
---|
| 577 | |
---|
| 578 | static GL2PSlist *gl2psListCreate(GLint n, GLint incr, GLint size) |
---|
| 579 | { |
---|
| 580 | GL2PSlist *list; |
---|
| 581 | |
---|
| 582 | if(n < 0) n = 0; |
---|
| 583 | if(incr <= 0) incr = 1; |
---|
| 584 | list = (GL2PSlist*)gl2psMalloc(sizeof(GL2PSlist)); |
---|
| 585 | list->nmax = 0; |
---|
| 586 | list->incr = incr; |
---|
| 587 | list->size = size; |
---|
| 588 | list->n = 0; |
---|
| 589 | list->array = NULL; |
---|
| 590 | gl2psListRealloc(list, n); |
---|
| 591 | return(list); |
---|
| 592 | } |
---|
| 593 | |
---|
| 594 | static void gl2psListReset(GL2PSlist *list) |
---|
| 595 | { |
---|
| 596 | if(!list) return; |
---|
| 597 | list->n = 0; |
---|
| 598 | } |
---|
| 599 | |
---|
| 600 | static void gl2psListDelete(GL2PSlist *list) |
---|
| 601 | { |
---|
| 602 | if(!list) return; |
---|
| 603 | gl2psFree(list->array); |
---|
| 604 | gl2psFree(list); |
---|
| 605 | } |
---|
| 606 | |
---|
| 607 | static void gl2psListAdd(GL2PSlist *list, void *data) |
---|
| 608 | { |
---|
| 609 | if(!list){ |
---|
| 610 | gl2psMsg(GL2PS_ERROR, "Cannot add into unallocated list"); |
---|
| 611 | return; |
---|
| 612 | } |
---|
| 613 | list->n++; |
---|
| 614 | gl2psListRealloc(list, list->n); |
---|
| 615 | memcpy(&list->array[(list->n - 1) * list->size], data, list->size); |
---|
| 616 | } |
---|
| 617 | |
---|
| 618 | static int gl2psListNbr(GL2PSlist *list) |
---|
| 619 | { |
---|
| 620 | if(!list) |
---|
| 621 | return 0; |
---|
| 622 | return(list->n); |
---|
| 623 | } |
---|
| 624 | |
---|
| 625 | static void *gl2psListPointer(GL2PSlist *list, GLint index) |
---|
| 626 | { |
---|
| 627 | if(!list){ |
---|
| 628 | gl2psMsg(GL2PS_ERROR, "Cannot point into unallocated list"); |
---|
| 629 | return NULL; |
---|
| 630 | } |
---|
| 631 | if((index < 0) || (index >= list->n)){ |
---|
| 632 | gl2psMsg(GL2PS_ERROR, "Wrong list index in gl2psListPointer"); |
---|
| 633 | return NULL; |
---|
| 634 | } |
---|
| 635 | return(&list->array[index * list->size]); |
---|
| 636 | } |
---|
| 637 | |
---|
| 638 | static void gl2psListSort(GL2PSlist *list, |
---|
| 639 | int (*fcmp)(const void *a, const void *b)) |
---|
| 640 | { |
---|
| 641 | if(!list) |
---|
| 642 | return; |
---|
| 643 | qsort(list->array, list->n, list->size, fcmp); |
---|
| 644 | } |
---|
| 645 | |
---|
| 646 | static void gl2psListAction(GL2PSlist *list, void (*action)(void *data)) |
---|
| 647 | { |
---|
| 648 | GLint i; |
---|
| 649 | |
---|
| 650 | for(i = 0; i < gl2psListNbr(list); i++){ |
---|
| 651 | (*action)(gl2psListPointer(list, i)); |
---|
| 652 | } |
---|
| 653 | } |
---|
| 654 | |
---|
| 655 | static void gl2psListActionInverse(GL2PSlist *list, void (*action)(void *data)) |
---|
| 656 | { |
---|
| 657 | GLint i; |
---|
| 658 | |
---|
| 659 | for(i = gl2psListNbr(list); i > 0; i--){ |
---|
| 660 | (*action)(gl2psListPointer(list, i-1)); |
---|
| 661 | } |
---|
| 662 | } |
---|
| 663 | |
---|
| 664 | #if defined(GL2PS_HAVE_LIBPNG) |
---|
| 665 | |
---|
| 666 | static void gl2psListRead(GL2PSlist *list, int index, void *data) |
---|
| 667 | { |
---|
| 668 | if((index < 0) || (index >= list->n)) |
---|
| 669 | gl2psMsg(GL2PS_ERROR, "Wrong list index in gl2psListRead"); |
---|
| 670 | memcpy(data, &list->array[index * list->size], list->size); |
---|
| 671 | } |
---|
| 672 | |
---|
| 673 | static void gl2psEncodeBase64Block(unsigned char in[3], unsigned char out[4], int len) |
---|
| 674 | { |
---|
| 675 | static const char cb64[] = |
---|
| 676 | "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; |
---|
| 677 | |
---|
| 678 | out[0] = cb64[ in[0] >> 2 ]; |
---|
| 679 | out[1] = cb64[ ((in[0] & 0x03) << 4) | ((in[1] & 0xf0) >> 4) ]; |
---|
| 680 | out[2] = (len > 1) ? cb64[ ((in[1] & 0x0f) << 2) | ((in[2] & 0xc0) >> 6) ] : '='; |
---|
| 681 | out[3] = (len > 2) ? cb64[ in[2] & 0x3f ] : '='; |
---|
| 682 | } |
---|
| 683 | |
---|
| 684 | static void gl2psListEncodeBase64(GL2PSlist *list) |
---|
| 685 | { |
---|
| 686 | unsigned char *buffer, in[3], out[4]; |
---|
| 687 | int i, n, index, len; |
---|
| 688 | |
---|
| 689 | n = list->n * list->size; |
---|
| 690 | buffer = (unsigned char*)gl2psMalloc(n * sizeof(unsigned char)); |
---|
| 691 | memcpy(buffer, list->array, n * sizeof(unsigned char)); |
---|
| 692 | gl2psListReset(list); |
---|
| 693 | |
---|
| 694 | index = 0; |
---|
| 695 | while(index < n) { |
---|
| 696 | len = 0; |
---|
| 697 | for(i = 0; i < 3; i++) { |
---|
| 698 | if(index < n){ |
---|
| 699 | in[i] = buffer[index]; |
---|
| 700 | len++; |
---|
| 701 | } |
---|
| 702 | else{ |
---|
| 703 | in[i] = 0; |
---|
| 704 | } |
---|
| 705 | index++; |
---|
| 706 | } |
---|
| 707 | if(len) { |
---|
| 708 | gl2psEncodeBase64Block(in, out, len); |
---|
| 709 | for(i = 0; i < 4; i++) |
---|
| 710 | gl2psListAdd(list, &out[i]); |
---|
| 711 | } |
---|
| 712 | } |
---|
| 713 | gl2psFree(buffer); |
---|
| 714 | } |
---|
| 715 | |
---|
| 716 | #endif |
---|
| 717 | |
---|
| 718 | /* Helpers for rgba colors */ |
---|
| 719 | |
---|
| 720 | static GLboolean gl2psSameColor(GL2PSrgba rgba1, GL2PSrgba rgba2) |
---|
| 721 | { |
---|
| 722 | if(!GL2PS_ZERO(rgba1[0] - rgba2[0]) || |
---|
| 723 | !GL2PS_ZERO(rgba1[1] - rgba2[1]) || |
---|
| 724 | !GL2PS_ZERO(rgba1[2] - rgba2[2])) |
---|
| 725 | return GL_FALSE; |
---|
| 726 | return GL_TRUE; |
---|
| 727 | } |
---|
| 728 | |
---|
| 729 | static GLboolean gl2psVertsSameColor(const GL2PSprimitive *prim) |
---|
| 730 | { |
---|
| 731 | int i; |
---|
| 732 | |
---|
| 733 | for(i = 1; i < prim->numverts; i++){ |
---|
| 734 | if(!gl2psSameColor(prim->verts[0].rgba, prim->verts[i].rgba)){ |
---|
| 735 | return GL_FALSE; |
---|
| 736 | } |
---|
| 737 | } |
---|
| 738 | return GL_TRUE; |
---|
| 739 | } |
---|
| 740 | |
---|
| 741 | static GLboolean gl2psSameColorThreshold(int n, GL2PSrgba rgba[], |
---|
| 742 | GL2PSrgba threshold) |
---|
| 743 | { |
---|
| 744 | int i; |
---|
| 745 | |
---|
| 746 | if(n < 2) return GL_TRUE; |
---|
| 747 | |
---|
| 748 | for(i = 1; i < n; i++){ |
---|
| 749 | if(std::fabs(rgba[0][0] - rgba[i][0]) > threshold[0] || |
---|
| 750 | std::fabs(rgba[0][1] - rgba[i][1]) > threshold[1] || |
---|
| 751 | std::fabs(rgba[0][2] - rgba[i][2]) > threshold[2]) |
---|
| 752 | return GL_FALSE; |
---|
| 753 | } |
---|
| 754 | |
---|
| 755 | return GL_TRUE; |
---|
| 756 | } |
---|
| 757 | |
---|
| 758 | static void gl2psSetLastColor(GL2PSrgba rgba) |
---|
| 759 | { |
---|
| 760 | int i; |
---|
| 761 | for(i = 0; i < 3; ++i){ |
---|
| 762 | gl2ps->lastrgba[i] = rgba[i]; |
---|
| 763 | } |
---|
| 764 | } |
---|
| 765 | |
---|
| 766 | static GLfloat gl2psGetRGB(GL2PSimage *im, GLuint x, GLuint y, |
---|
| 767 | GLfloat *red, GLfloat *green, GLfloat *blue) |
---|
| 768 | { |
---|
| 769 | |
---|
| 770 | GLsizei width = im->width; |
---|
| 771 | GLsizei height = im->height; |
---|
| 772 | GLfloat *pixels = im->pixels; |
---|
| 773 | GLfloat *pimag; |
---|
| 774 | |
---|
| 775 | /* OpenGL image is from down to up, PS image is up to down */ |
---|
| 776 | switch(im->format){ |
---|
| 777 | case GL_RGBA: |
---|
| 778 | pimag = pixels + 4 * (width * (height - 1 - y) + x); |
---|
| 779 | break; |
---|
| 780 | case GL_RGB: |
---|
| 781 | default: |
---|
| 782 | pimag = pixels + 3 * (width * (height - 1 - y) + x); |
---|
| 783 | break; |
---|
| 784 | } |
---|
| 785 | *red = *pimag; pimag++; |
---|
| 786 | *green = *pimag; pimag++; |
---|
| 787 | *blue = *pimag; pimag++; |
---|
| 788 | |
---|
| 789 | return (im->format == GL_RGBA) ? *pimag : 1.0F; |
---|
| 790 | } |
---|
| 791 | |
---|
| 792 | /* Helper routines for pixmaps */ |
---|
| 793 | |
---|
| 794 | static GL2PSimage *gl2psCopyPixmap(GL2PSimage *im) |
---|
| 795 | { |
---|
| 796 | int size; |
---|
| 797 | GL2PSimage *image = (GL2PSimage*)gl2psMalloc(sizeof(GL2PSimage)); |
---|
| 798 | |
---|
| 799 | image->width = im->width; |
---|
| 800 | image->height = im->height; |
---|
| 801 | image->format = im->format; |
---|
| 802 | image->type = im->type; |
---|
| 803 | |
---|
| 804 | switch(image->format){ |
---|
| 805 | case GL_RGBA: |
---|
| 806 | size = image->height * image->width * 4 * sizeof(GLfloat); |
---|
| 807 | break; |
---|
| 808 | case GL_RGB: |
---|
| 809 | default: |
---|
| 810 | size = image->height * image->width * 3 * sizeof(GLfloat); |
---|
| 811 | break; |
---|
| 812 | } |
---|
| 813 | |
---|
| 814 | image->pixels = (GLfloat*)gl2psMalloc(size); |
---|
| 815 | memcpy(image->pixels, im->pixels, size); |
---|
| 816 | |
---|
| 817 | return image; |
---|
| 818 | } |
---|
| 819 | |
---|
| 820 | static void gl2psFreePixmap(GL2PSimage *im) |
---|
| 821 | { |
---|
| 822 | if(!im) |
---|
| 823 | return; |
---|
| 824 | gl2psFree(im->pixels); |
---|
| 825 | gl2psFree(im); |
---|
| 826 | } |
---|
| 827 | |
---|
| 828 | #if defined(GL2PS_HAVE_LIBPNG) |
---|
| 829 | |
---|
| 830 | #if !defined(png_jmpbuf) |
---|
| 831 | # define png_jmpbuf(png_ptr) ((png_ptr)->jmpbuf) |
---|
| 832 | #endif |
---|
| 833 | |
---|
| 834 | static void gl2psUserWritePNG(png_structp png_ptr, png_bytep data, png_size_t length) |
---|
| 835 | { |
---|
| 836 | unsigned int i; |
---|
| 837 | GL2PSlist *png = (GL2PSlist*)png_get_io_ptr(png_ptr); |
---|
| 838 | for(i = 0; i < length; i++) |
---|
| 839 | gl2psListAdd(png, &data[i]); |
---|
| 840 | } |
---|
| 841 | |
---|
| 842 | static void gl2psUserFlushPNG(png_structp png_ptr) |
---|
| 843 | { |
---|
| 844 | } |
---|
| 845 | |
---|
| 846 | static void gl2psConvertPixmapToPNG(GL2PSimage *pixmap, GL2PSlist *png) |
---|
| 847 | { |
---|
| 848 | png_structp png_ptr; |
---|
| 849 | png_infop info_ptr; |
---|
| 850 | unsigned char *row_data; |
---|
| 851 | GLfloat dr, dg, db; |
---|
| 852 | int row, col; |
---|
| 853 | |
---|
| 854 | if(!(png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL))) |
---|
| 855 | return; |
---|
| 856 | |
---|
| 857 | if(!(info_ptr = png_create_info_struct(png_ptr))){ |
---|
| 858 | png_destroy_write_struct(&png_ptr, NULL); |
---|
| 859 | return; |
---|
| 860 | } |
---|
| 861 | |
---|
| 862 | if(setjmp(png_jmpbuf(png_ptr))) { |
---|
| 863 | png_destroy_write_struct(&png_ptr, &info_ptr); |
---|
| 864 | return; |
---|
| 865 | } |
---|
| 866 | |
---|
| 867 | png_set_write_fn(png_ptr, (void *)png, gl2psUserWritePNG, gl2psUserFlushPNG); |
---|
| 868 | png_set_compression_level(png_ptr, Z_DEFAULT_COMPRESSION); |
---|
| 869 | png_set_IHDR(png_ptr, info_ptr, pixmap->width, pixmap->height, 8, |
---|
| 870 | PNG_COLOR_TYPE_RGB, PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_BASE, |
---|
| 871 | PNG_FILTER_TYPE_BASE); |
---|
| 872 | png_write_info(png_ptr, info_ptr); |
---|
| 873 | |
---|
| 874 | row_data = (unsigned char*)gl2psMalloc(3 * pixmap->width * sizeof(unsigned char)); |
---|
| 875 | for(row = 0; row < pixmap->height; row++){ |
---|
| 876 | for(col = 0; col < pixmap->width; col++){ |
---|
| 877 | gl2psGetRGB(pixmap, col, row, &dr, &dg, &db); |
---|
| 878 | row_data[3*col] = (unsigned char)(255. * dr); |
---|
| 879 | row_data[3*col+1] = (unsigned char)(255. * dg); |
---|
| 880 | row_data[3*col+2] = (unsigned char)(255. * db); |
---|
| 881 | } |
---|
| 882 | png_write_row(png_ptr, (png_bytep)row_data); |
---|
| 883 | } |
---|
| 884 | gl2psFree(row_data); |
---|
| 885 | |
---|
| 886 | png_write_end(png_ptr, info_ptr); |
---|
| 887 | png_destroy_write_struct(&png_ptr, &info_ptr); |
---|
| 888 | } |
---|
| 889 | |
---|
| 890 | #endif |
---|
| 891 | |
---|
| 892 | /* Helper routines for text strings */ |
---|
| 893 | |
---|
| 894 | static GLint gl2psAddText(GLint type, const char *str, const char *fontname, |
---|
| 895 | GLshort fontsize, GLint alignment, GLfloat angle) |
---|
| 896 | { |
---|
| 897 | GLfloat pos[4]; |
---|
| 898 | GL2PSprimitive *prim; |
---|
| 899 | GLboolean valid; |
---|
| 900 | |
---|
| 901 | if(!gl2ps || !str || !fontname) return GL2PS_UNINITIALIZED; |
---|
| 902 | |
---|
| 903 | if(gl2ps->options & GL2PS_NO_TEXT) return GL2PS_SUCCESS; |
---|
| 904 | |
---|
| 905 | glGetBooleanv(GL_CURRENT_RASTER_POSITION_VALID, &valid); |
---|
| 906 | if(GL_FALSE == valid) return GL2PS_SUCCESS; /* the primitive is culled */ |
---|
| 907 | |
---|
| 908 | glGetFloatv(GL_CURRENT_RASTER_POSITION, pos); |
---|
| 909 | |
---|
| 910 | prim = (GL2PSprimitive*)gl2psMalloc(sizeof(GL2PSprimitive)); |
---|
| 911 | prim->type = type; |
---|
| 912 | prim->boundary = 0; |
---|
| 913 | prim->numverts = 1; |
---|
| 914 | prim->verts = (GL2PSvertex*)gl2psMalloc(sizeof(GL2PSvertex)); |
---|
| 915 | prim->verts[0].xyz[0] = pos[0]; |
---|
| 916 | prim->verts[0].xyz[1] = pos[1]; |
---|
| 917 | prim->verts[0].xyz[2] = pos[2]; |
---|
| 918 | prim->culled = 0; |
---|
| 919 | prim->offset = 0; |
---|
| 920 | prim->pattern = 0; |
---|
| 921 | prim->factor = 0; |
---|
| 922 | prim->width = 1; |
---|
| 923 | glGetFloatv(GL_CURRENT_RASTER_COLOR, prim->verts[0].rgba); |
---|
| 924 | prim->data.text = (GL2PSstring*)gl2psMalloc(sizeof(GL2PSstring)); |
---|
| 925 | prim->data.text->str = (char*)gl2psMalloc((strlen(str)+1)*sizeof(char)); |
---|
| 926 | strcpy(prim->data.text->str, str); |
---|
| 927 | prim->data.text->fontname = (char*)gl2psMalloc((strlen(fontname)+1)*sizeof(char)); |
---|
| 928 | strcpy(prim->data.text->fontname, fontname); |
---|
| 929 | prim->data.text->fontsize = fontsize; |
---|
| 930 | prim->data.text->alignment = alignment; |
---|
| 931 | prim->data.text->angle = angle; |
---|
| 932 | |
---|
| 933 | gl2psListAdd(gl2ps->auxprimitives, &prim); |
---|
| 934 | glPassThrough(GL2PS_TEXT_TOKEN); |
---|
| 935 | |
---|
| 936 | return GL2PS_SUCCESS; |
---|
| 937 | } |
---|
| 938 | |
---|
| 939 | static GL2PSstring *gl2psCopyText(GL2PSstring *t) |
---|
| 940 | { |
---|
| 941 | GL2PSstring *text = (GL2PSstring*)gl2psMalloc(sizeof(GL2PSstring)); |
---|
| 942 | text->str = (char*)gl2psMalloc((strlen(t->str)+1)*sizeof(char)); |
---|
| 943 | strcpy(text->str, t->str); |
---|
| 944 | text->fontname = (char*)gl2psMalloc((strlen(t->fontname)+1)*sizeof(char)); |
---|
| 945 | strcpy(text->fontname, t->fontname); |
---|
| 946 | text->fontsize = t->fontsize; |
---|
| 947 | text->alignment = t->alignment; |
---|
| 948 | text->angle = t->angle; |
---|
| 949 | |
---|
| 950 | return text; |
---|
| 951 | } |
---|
| 952 | |
---|
| 953 | static void gl2psFreeText(GL2PSstring *text) |
---|
| 954 | { |
---|
| 955 | if(!text) |
---|
| 956 | return; |
---|
| 957 | gl2psFree(text->str); |
---|
| 958 | gl2psFree(text->fontname); |
---|
| 959 | gl2psFree(text); |
---|
| 960 | } |
---|
| 961 | |
---|
| 962 | /* Helpers for blending modes */ |
---|
| 963 | |
---|
| 964 | static GLboolean gl2psSupportedBlendMode(GLenum sfactor, GLenum dfactor) |
---|
| 965 | { |
---|
| 966 | /* returns TRUE if gl2ps supports the argument combination: only two |
---|
| 967 | blending modes have been implemented so far */ |
---|
| 968 | |
---|
| 969 | if( (sfactor == GL_SRC_ALPHA && dfactor == GL_ONE_MINUS_SRC_ALPHA) || |
---|
| 970 | (sfactor == GL_ONE && dfactor == GL_ZERO) ) |
---|
| 971 | return GL_TRUE; |
---|
| 972 | return GL_FALSE; |
---|
| 973 | } |
---|
| 974 | |
---|
| 975 | static void gl2psAdaptVertexForBlending(GL2PSvertex *v) |
---|
| 976 | { |
---|
| 977 | /* Transforms vertex depending on the actual blending function - |
---|
| 978 | currently the vertex v is considered as source vertex and his |
---|
| 979 | alpha value is changed to 1.0 if source blending GL_ONE is |
---|
| 980 | active. This might be extended in the future */ |
---|
| 981 | |
---|
| 982 | if(!v || !gl2ps) |
---|
| 983 | return; |
---|
| 984 | |
---|
| 985 | if(gl2ps->options & GL2PS_NO_BLENDING || !gl2ps->blending){ |
---|
| 986 | v->rgba[3] = 1.0F; |
---|
| 987 | return; |
---|
| 988 | } |
---|
| 989 | |
---|
| 990 | switch(gl2ps->blendfunc[0]){ |
---|
| 991 | case GL_ONE: |
---|
| 992 | v->rgba[3] = 1.0F; |
---|
| 993 | break; |
---|
| 994 | default: |
---|
| 995 | break; |
---|
| 996 | } |
---|
| 997 | } |
---|
| 998 | |
---|
| 999 | static void gl2psAssignTriangleProperties(GL2PStriangle *t) |
---|
| 1000 | { |
---|
| 1001 | /* int i; */ |
---|
| 1002 | |
---|
| 1003 | t->prop = T_VAR_COLOR; |
---|
| 1004 | |
---|
| 1005 | /* Uncommenting the following lines activates an even more fine |
---|
| 1006 | grained distinction between triangle types - please don't delete, |
---|
| 1007 | a remarkable amount of PDF handling code inside this file depends |
---|
| 1008 | on it if activated */ |
---|
| 1009 | /* |
---|
| 1010 | t->prop = T_CONST_COLOR; |
---|
| 1011 | for(i = 0; i < 3; ++i){ |
---|
| 1012 | if(!GL2PS_ZERO(t->vertex[0].rgba[i] - t->vertex[1].rgba[i]) || |
---|
| 1013 | !GL2PS_ZERO(t->vertex[1].rgba[i] - t->vertex[2].rgba[i])){ |
---|
| 1014 | t->prop = T_VAR_COLOR; |
---|
| 1015 | break; |
---|
| 1016 | } |
---|
| 1017 | } |
---|
| 1018 | */ |
---|
| 1019 | |
---|
| 1020 | if(!GL2PS_ZERO(t->vertex[0].rgba[3] - t->vertex[1].rgba[3]) || |
---|
| 1021 | !GL2PS_ZERO(t->vertex[1].rgba[3] - t->vertex[2].rgba[3])){ |
---|
| 1022 | t->prop |= T_VAR_ALPHA; |
---|
| 1023 | } |
---|
| 1024 | else{ |
---|
| 1025 | if(t->vertex[0].rgba[3] < 1) |
---|
| 1026 | t->prop |= T_ALPHA_LESS_1; |
---|
| 1027 | else |
---|
| 1028 | t->prop |= T_ALPHA_1; |
---|
| 1029 | } |
---|
| 1030 | } |
---|
| 1031 | |
---|
| 1032 | static void gl2psFillTriangleFromPrimitive(GL2PStriangle *t, GL2PSprimitive *p, |
---|
| 1033 | GLboolean assignprops) |
---|
| 1034 | { |
---|
| 1035 | t->vertex[0] = p->verts[0]; |
---|
| 1036 | t->vertex[1] = p->verts[1]; |
---|
| 1037 | t->vertex[2] = p->verts[2]; |
---|
| 1038 | if(GL_TRUE == assignprops) |
---|
| 1039 | gl2psAssignTriangleProperties(t); |
---|
| 1040 | } |
---|
| 1041 | |
---|
| 1042 | static void gl2psInitTriangle(GL2PStriangle *t) |
---|
| 1043 | { |
---|
| 1044 | int i; |
---|
| 1045 | GL2PSvertex vertex = { {-1.0F, -1.0F, -1.0F}, {-1.0F, -1.0F, -1.0F, -1.0F} }; |
---|
| 1046 | for(i = 0; i < 3; i++) |
---|
| 1047 | t->vertex[i] = vertex; |
---|
| 1048 | t->prop = T_UNDEFINED; |
---|
| 1049 | } |
---|
| 1050 | |
---|
| 1051 | /* Miscellaneous helper routines */ |
---|
| 1052 | |
---|
| 1053 | static GL2PSprimitive *gl2psCopyPrimitive(GL2PSprimitive *p) |
---|
| 1054 | { |
---|
| 1055 | GL2PSprimitive *prim; |
---|
| 1056 | |
---|
| 1057 | if(!p){ |
---|
| 1058 | gl2psMsg(GL2PS_ERROR, "Trying to copy an empty primitive"); |
---|
| 1059 | return NULL; |
---|
| 1060 | } |
---|
| 1061 | |
---|
| 1062 | prim = (GL2PSprimitive*)gl2psMalloc(sizeof(GL2PSprimitive)); |
---|
| 1063 | |
---|
| 1064 | prim->type = p->type; |
---|
| 1065 | prim->numverts = p->numverts; |
---|
| 1066 | prim->boundary = p->boundary; |
---|
| 1067 | prim->offset = p->offset; |
---|
| 1068 | prim->pattern = p->pattern; |
---|
| 1069 | prim->factor = p->factor; |
---|
| 1070 | prim->culled = p->culled; |
---|
| 1071 | prim->width = p->width; |
---|
| 1072 | prim->verts = (GL2PSvertex*)gl2psMalloc(p->numverts*sizeof(GL2PSvertex)); |
---|
| 1073 | memcpy(prim->verts, p->verts, p->numverts * sizeof(GL2PSvertex)); |
---|
| 1074 | |
---|
| 1075 | switch(prim->type){ |
---|
| 1076 | case GL2PS_PIXMAP : |
---|
| 1077 | prim->data.image = gl2psCopyPixmap(p->data.image); |
---|
| 1078 | break; |
---|
| 1079 | case GL2PS_TEXT : |
---|
| 1080 | case GL2PS_SPECIAL : |
---|
| 1081 | prim->data.text = gl2psCopyText(p->data.text); |
---|
| 1082 | break; |
---|
| 1083 | default: |
---|
| 1084 | break; |
---|
| 1085 | } |
---|
| 1086 | |
---|
| 1087 | return prim; |
---|
| 1088 | } |
---|
| 1089 | |
---|
| 1090 | static GLboolean gl2psSamePosition(GL2PSxyz p1, GL2PSxyz p2) |
---|
| 1091 | { |
---|
| 1092 | if(!GL2PS_ZERO(p1[0] - p2[0]) || |
---|
| 1093 | !GL2PS_ZERO(p1[1] - p2[1]) || |
---|
| 1094 | !GL2PS_ZERO(p1[2] - p2[2])) |
---|
| 1095 | return GL_FALSE; |
---|
| 1096 | return GL_TRUE; |
---|
| 1097 | } |
---|
| 1098 | |
---|
| 1099 | /********************************************************************* |
---|
| 1100 | * |
---|
| 1101 | * 3D sorting routines |
---|
| 1102 | * |
---|
| 1103 | *********************************************************************/ |
---|
| 1104 | |
---|
| 1105 | static GLfloat gl2psComparePointPlane(GL2PSxyz point, GL2PSplane plane) |
---|
| 1106 | { |
---|
| 1107 | return(plane[0] * point[0] + |
---|
| 1108 | plane[1] * point[1] + |
---|
| 1109 | plane[2] * point[2] + |
---|
| 1110 | plane[3]); |
---|
| 1111 | } |
---|
| 1112 | |
---|
| 1113 | static GLfloat gl2psPsca(GLfloat *a, GLfloat *b) |
---|
| 1114 | { |
---|
| 1115 | return(a[0]*b[0] + a[1]*b[1] + a[2]*b[2]); |
---|
| 1116 | } |
---|
| 1117 | |
---|
| 1118 | static void gl2psPvec(GLfloat *a, GLfloat *b, GLfloat *c) |
---|
| 1119 | { |
---|
| 1120 | c[0] = a[1]*b[2] - a[2]*b[1]; |
---|
| 1121 | c[1] = a[2]*b[0] - a[0]*b[2]; |
---|
| 1122 | c[2] = a[0]*b[1] - a[1]*b[0]; |
---|
| 1123 | } |
---|
| 1124 | |
---|
| 1125 | static GLfloat gl2psNorm(GLfloat *a) |
---|
| 1126 | { |
---|
| 1127 | return (GLfloat)sqrt(a[0]*a[0] + a[1]*a[1] + a[2]*a[2]); |
---|
| 1128 | } |
---|
| 1129 | |
---|
| 1130 | static void gl2psGetNormal(GLfloat *a, GLfloat *b, GLfloat *c) |
---|
| 1131 | { |
---|
| 1132 | GLfloat norm; |
---|
| 1133 | |
---|
| 1134 | gl2psPvec(a, b, c); |
---|
| 1135 | if(!GL2PS_ZERO(norm = gl2psNorm(c))){ |
---|
| 1136 | c[0] = c[0] / norm; |
---|
| 1137 | c[1] = c[1] / norm; |
---|
| 1138 | c[2] = c[2] / norm; |
---|
| 1139 | } |
---|
| 1140 | else{ |
---|
| 1141 | /* The plane is still wrong despite our tests in gl2psGetPlane. |
---|
| 1142 | Let's return a dummy value for now (this is a hack: we should |
---|
| 1143 | do more intelligent tests in GetPlane) */ |
---|
| 1144 | c[0] = c[1] = 0.0F; |
---|
| 1145 | c[2] = 1.0F; |
---|
| 1146 | } |
---|
| 1147 | } |
---|
| 1148 | |
---|
| 1149 | static void gl2psGetPlane(GL2PSprimitive *prim, GL2PSplane plane) |
---|
| 1150 | { |
---|
| 1151 | GL2PSxyz v = {0.0F, 0.0F, 0.0F}, w = {0.0F, 0.0F, 0.0F}; |
---|
| 1152 | |
---|
| 1153 | switch(prim->type){ |
---|
| 1154 | case GL2PS_TRIANGLE : |
---|
| 1155 | case GL2PS_QUADRANGLE : |
---|
| 1156 | v[0] = prim->verts[1].xyz[0] - prim->verts[0].xyz[0]; |
---|
| 1157 | v[1] = prim->verts[1].xyz[1] - prim->verts[0].xyz[1]; |
---|
| 1158 | v[2] = prim->verts[1].xyz[2] - prim->verts[0].xyz[2]; |
---|
| 1159 | w[0] = prim->verts[2].xyz[0] - prim->verts[0].xyz[0]; |
---|
| 1160 | w[1] = prim->verts[2].xyz[1] - prim->verts[0].xyz[1]; |
---|
| 1161 | w[2] = prim->verts[2].xyz[2] - prim->verts[0].xyz[2]; |
---|
| 1162 | if((GL2PS_ZERO(v[0]) && GL2PS_ZERO(v[1]) && GL2PS_ZERO(v[2])) || |
---|
| 1163 | (GL2PS_ZERO(w[0]) && GL2PS_ZERO(w[1]) && GL2PS_ZERO(w[2]))){ |
---|
| 1164 | plane[0] = plane[1] = 0.0F; |
---|
| 1165 | plane[2] = 1.0F; |
---|
| 1166 | plane[3] = -prim->verts[0].xyz[2]; |
---|
| 1167 | } |
---|
| 1168 | else{ |
---|
| 1169 | gl2psGetNormal(v, w, plane); |
---|
| 1170 | plane[3] = |
---|
| 1171 | - plane[0] * prim->verts[0].xyz[0] |
---|
| 1172 | - plane[1] * prim->verts[0].xyz[1] |
---|
| 1173 | - plane[2] * prim->verts[0].xyz[2]; |
---|
| 1174 | } |
---|
| 1175 | break; |
---|
| 1176 | case GL2PS_LINE : |
---|
| 1177 | v[0] = prim->verts[1].xyz[0] - prim->verts[0].xyz[0]; |
---|
| 1178 | v[1] = prim->verts[1].xyz[1] - prim->verts[0].xyz[1]; |
---|
| 1179 | v[2] = prim->verts[1].xyz[2] - prim->verts[0].xyz[2]; |
---|
| 1180 | if(GL2PS_ZERO(v[0]) && GL2PS_ZERO(v[1]) && GL2PS_ZERO(v[2])){ |
---|
| 1181 | plane[0] = plane[1] = 0.0F; |
---|
| 1182 | plane[2] = 1.0F; |
---|
| 1183 | plane[3] = -prim->verts[0].xyz[2]; |
---|
| 1184 | } |
---|
| 1185 | else{ |
---|
| 1186 | if(GL2PS_ZERO(v[0])) w[0] = 1.0F; |
---|
| 1187 | else if(GL2PS_ZERO(v[1])) w[1] = 1.0F; |
---|
| 1188 | else w[2] = 1.0F; |
---|
| 1189 | gl2psGetNormal(v, w, plane); |
---|
| 1190 | plane[3] = |
---|
| 1191 | - plane[0] * prim->verts[0].xyz[0] |
---|
| 1192 | - plane[1] * prim->verts[0].xyz[1] |
---|
| 1193 | - plane[2] * prim->verts[0].xyz[2]; |
---|
| 1194 | } |
---|
| 1195 | break; |
---|
| 1196 | case GL2PS_POINT : |
---|
| 1197 | case GL2PS_PIXMAP : |
---|
| 1198 | case GL2PS_TEXT : |
---|
| 1199 | case GL2PS_SPECIAL : |
---|
| 1200 | case GL2PS_IMAGEMAP: |
---|
| 1201 | plane[0] = plane[1] = 0.0F; |
---|
| 1202 | plane[2] = 1.0F; |
---|
| 1203 | plane[3] = -prim->verts[0].xyz[2]; |
---|
| 1204 | break; |
---|
| 1205 | default : |
---|
| 1206 | gl2psMsg(GL2PS_ERROR, "Unknown primitive type in BSP tree"); |
---|
| 1207 | plane[0] = plane[1] = plane[3] = 0.0F; |
---|
| 1208 | plane[2] = 1.0F; |
---|
| 1209 | break; |
---|
| 1210 | } |
---|
| 1211 | } |
---|
| 1212 | |
---|
| 1213 | static void gl2psCutEdge(GL2PSvertex *a, GL2PSvertex *b, GL2PSplane plane, |
---|
| 1214 | GL2PSvertex *c) |
---|
| 1215 | { |
---|
| 1216 | GL2PSxyz v; |
---|
| 1217 | GLfloat sect, psca; |
---|
| 1218 | |
---|
| 1219 | v[0] = b->xyz[0] - a->xyz[0]; |
---|
| 1220 | v[1] = b->xyz[1] - a->xyz[1]; |
---|
| 1221 | v[2] = b->xyz[2] - a->xyz[2]; |
---|
| 1222 | |
---|
| 1223 | if(!GL2PS_ZERO(psca = gl2psPsca(plane, v))) |
---|
| 1224 | sect = -gl2psComparePointPlane(a->xyz, plane) / psca; |
---|
| 1225 | else |
---|
| 1226 | sect = 0.0F; |
---|
| 1227 | |
---|
| 1228 | c->xyz[0] = a->xyz[0] + v[0] * sect; |
---|
| 1229 | c->xyz[1] = a->xyz[1] + v[1] * sect; |
---|
| 1230 | c->xyz[2] = a->xyz[2] + v[2] * sect; |
---|
| 1231 | |
---|
| 1232 | c->rgba[0] = (1 - sect) * a->rgba[0] + sect * b->rgba[0]; |
---|
| 1233 | c->rgba[1] = (1 - sect) * a->rgba[1] + sect * b->rgba[1]; |
---|
| 1234 | c->rgba[2] = (1 - sect) * a->rgba[2] + sect * b->rgba[2]; |
---|
| 1235 | c->rgba[3] = (1 - sect) * a->rgba[3] + sect * b->rgba[3]; |
---|
| 1236 | } |
---|
| 1237 | |
---|
| 1238 | static void gl2psCreateSplitPrimitive(GL2PSprimitive *parent, GL2PSplane plane, |
---|
| 1239 | GL2PSprimitive *child, GLshort numverts, |
---|
| 1240 | GLshort *index0, GLshort *index1) |
---|
| 1241 | { |
---|
| 1242 | GLshort i; |
---|
| 1243 | |
---|
| 1244 | if(parent->type == GL2PS_IMAGEMAP){ |
---|
| 1245 | child->type = GL2PS_IMAGEMAP; |
---|
| 1246 | child->data.image = parent->data.image; |
---|
| 1247 | } |
---|
| 1248 | else{ |
---|
| 1249 | if(numverts > 4){ |
---|
| 1250 | gl2psMsg(GL2PS_WARNING, "%d vertices in polygon", numverts); |
---|
| 1251 | numverts = 4; |
---|
| 1252 | } |
---|
| 1253 | switch(numverts){ |
---|
| 1254 | case 1 : child->type = GL2PS_POINT; break; |
---|
| 1255 | case 2 : child->type = GL2PS_LINE; break; |
---|
| 1256 | case 3 : child->type = GL2PS_TRIANGLE; break; |
---|
| 1257 | case 4 : child->type = GL2PS_QUADRANGLE; break; |
---|
| 1258 | default: child->type = GL2PS_NO_TYPE; break; |
---|
| 1259 | } |
---|
| 1260 | } |
---|
| 1261 | |
---|
| 1262 | child->boundary = 0; /* FIXME: not done! */ |
---|
| 1263 | child->culled = parent->culled; |
---|
| 1264 | child->offset = parent->offset; |
---|
| 1265 | child->pattern = parent->pattern; |
---|
| 1266 | child->factor = parent->factor; |
---|
| 1267 | child->width = parent->width; |
---|
| 1268 | child->numverts = numverts; |
---|
| 1269 | child->verts = (GL2PSvertex*)gl2psMalloc(numverts * sizeof(GL2PSvertex)); |
---|
| 1270 | |
---|
| 1271 | for(i = 0; i < numverts; i++){ |
---|
| 1272 | if(index1[i] < 0){ |
---|
| 1273 | child->verts[i] = parent->verts[index0[i]]; |
---|
| 1274 | } |
---|
| 1275 | else{ |
---|
| 1276 | gl2psCutEdge(&parent->verts[index0[i]], &parent->verts[index1[i]], |
---|
| 1277 | plane, &child->verts[i]); |
---|
| 1278 | } |
---|
| 1279 | } |
---|
| 1280 | } |
---|
| 1281 | |
---|
| 1282 | static void gl2psAddIndex(GLshort *index0, GLshort *index1, GLshort *nb, |
---|
| 1283 | GLshort i, GLshort j) |
---|
| 1284 | { |
---|
| 1285 | GLint k; |
---|
| 1286 | |
---|
| 1287 | for(k = 0; k < *nb; k++){ |
---|
| 1288 | if((index0[k] == i && index1[k] == j) || |
---|
| 1289 | (index1[k] == i && index0[k] == j)) return; |
---|
| 1290 | } |
---|
| 1291 | index0[*nb] = i; |
---|
| 1292 | index1[*nb] = j; |
---|
| 1293 | (*nb)++; |
---|
| 1294 | } |
---|
| 1295 | |
---|
| 1296 | static GLshort gl2psGetIndex(GLshort i, GLshort num) |
---|
| 1297 | { |
---|
| 1298 | return (i < num - 1) ? i + 1 : 0; |
---|
| 1299 | } |
---|
| 1300 | |
---|
| 1301 | static GLint gl2psTestSplitPrimitive(GL2PSprimitive *prim, GL2PSplane plane) |
---|
| 1302 | { |
---|
| 1303 | GLint type = GL2PS_COINCIDENT; |
---|
| 1304 | GLshort i, j; |
---|
| 1305 | GLfloat d[5]; |
---|
| 1306 | |
---|
| 1307 | for(i = 0; i < prim->numverts; i++){ |
---|
| 1308 | d[i] = gl2psComparePointPlane(prim->verts[i].xyz, plane); |
---|
| 1309 | } |
---|
| 1310 | |
---|
| 1311 | if(prim->numverts < 2){ |
---|
| 1312 | return 0; |
---|
| 1313 | } |
---|
| 1314 | else{ |
---|
| 1315 | for(i = 0; i < prim->numverts; i++){ |
---|
| 1316 | j = gl2psGetIndex(i, prim->numverts); |
---|
| 1317 | if(d[j] > GL2PS_EPSILON){ |
---|
| 1318 | if(type == GL2PS_COINCIDENT) type = GL2PS_IN_BACK_OF; |
---|
| 1319 | else if(type != GL2PS_IN_BACK_OF) return 1; |
---|
| 1320 | if(d[i] < -GL2PS_EPSILON) return 1; |
---|
| 1321 | } |
---|
| 1322 | else if(d[j] < -GL2PS_EPSILON){ |
---|
| 1323 | if(type == GL2PS_COINCIDENT) type = GL2PS_IN_FRONT_OF; |
---|
| 1324 | else if(type != GL2PS_IN_FRONT_OF) return 1; |
---|
| 1325 | if(d[i] > GL2PS_EPSILON) return 1; |
---|
| 1326 | } |
---|
| 1327 | } |
---|
| 1328 | } |
---|
| 1329 | return 0; |
---|
| 1330 | } |
---|
| 1331 | |
---|
| 1332 | static GLint gl2psSplitPrimitive(GL2PSprimitive *prim, GL2PSplane plane, |
---|
| 1333 | GL2PSprimitive **front, GL2PSprimitive **back) |
---|
| 1334 | { |
---|
| 1335 | GLshort i, j, in = 0, out = 0, in0[5], in1[5], out0[5], out1[5]; |
---|
| 1336 | GLint type; |
---|
| 1337 | GLfloat d[5]; |
---|
| 1338 | |
---|
| 1339 | type = GL2PS_COINCIDENT; |
---|
| 1340 | |
---|
| 1341 | for(i = 0; i < prim->numverts; i++){ |
---|
| 1342 | d[i] = gl2psComparePointPlane(prim->verts[i].xyz, plane); |
---|
| 1343 | } |
---|
| 1344 | |
---|
| 1345 | switch(prim->type){ |
---|
| 1346 | case GL2PS_POINT : |
---|
| 1347 | if(d[0] > GL2PS_EPSILON) type = GL2PS_IN_BACK_OF; |
---|
| 1348 | else if(d[0] < -GL2PS_EPSILON) type = GL2PS_IN_FRONT_OF; |
---|
| 1349 | else type = GL2PS_COINCIDENT; |
---|
| 1350 | break; |
---|
| 1351 | default : |
---|
| 1352 | for(i = 0; i < prim->numverts; i++){ |
---|
| 1353 | j = gl2psGetIndex(i, prim->numverts); |
---|
| 1354 | if(d[j] > GL2PS_EPSILON){ |
---|
| 1355 | if(type == GL2PS_COINCIDENT) type = GL2PS_IN_BACK_OF; |
---|
| 1356 | else if(type != GL2PS_IN_BACK_OF) type = GL2PS_SPANNING; |
---|
| 1357 | if(d[i] < -GL2PS_EPSILON){ |
---|
| 1358 | gl2psAddIndex(in0, in1, &in, i, j); |
---|
| 1359 | gl2psAddIndex(out0, out1, &out, i, j); |
---|
| 1360 | type = GL2PS_SPANNING; |
---|
| 1361 | } |
---|
| 1362 | gl2psAddIndex(out0, out1, &out, j, -1); |
---|
| 1363 | } |
---|
| 1364 | else if(d[j] < -GL2PS_EPSILON){ |
---|
| 1365 | if(type == GL2PS_COINCIDENT) type = GL2PS_IN_FRONT_OF; |
---|
| 1366 | else if(type != GL2PS_IN_FRONT_OF) type = GL2PS_SPANNING; |
---|
| 1367 | if(d[i] > GL2PS_EPSILON){ |
---|
| 1368 | gl2psAddIndex(in0, in1, &in, i, j); |
---|
| 1369 | gl2psAddIndex(out0, out1, &out, i, j); |
---|
| 1370 | type = GL2PS_SPANNING; |
---|
| 1371 | } |
---|
| 1372 | gl2psAddIndex(in0, in1, &in, j, -1); |
---|
| 1373 | } |
---|
| 1374 | else{ |
---|
| 1375 | gl2psAddIndex(in0, in1, &in, j, -1); |
---|
| 1376 | gl2psAddIndex(out0, out1, &out, j, -1); |
---|
| 1377 | } |
---|
| 1378 | } |
---|
| 1379 | break; |
---|
| 1380 | } |
---|
| 1381 | |
---|
| 1382 | if(type == GL2PS_SPANNING){ |
---|
| 1383 | *back = (GL2PSprimitive*)gl2psMalloc(sizeof(GL2PSprimitive)); |
---|
| 1384 | *front = (GL2PSprimitive*)gl2psMalloc(sizeof(GL2PSprimitive)); |
---|
| 1385 | gl2psCreateSplitPrimitive(prim, plane, *back, out, out0, out1); |
---|
| 1386 | gl2psCreateSplitPrimitive(prim, plane, *front, in, in0, in1); |
---|
| 1387 | } |
---|
| 1388 | |
---|
| 1389 | return type; |
---|
| 1390 | } |
---|
| 1391 | |
---|
| 1392 | static void gl2psDivideQuad(GL2PSprimitive *quad, |
---|
| 1393 | GL2PSprimitive **t1, GL2PSprimitive **t2) |
---|
| 1394 | { |
---|
| 1395 | *t1 = (GL2PSprimitive*)gl2psMalloc(sizeof(GL2PSprimitive)); |
---|
| 1396 | *t2 = (GL2PSprimitive*)gl2psMalloc(sizeof(GL2PSprimitive)); |
---|
| 1397 | (*t1)->type = (*t2)->type = GL2PS_TRIANGLE; |
---|
| 1398 | (*t1)->numverts = (*t2)->numverts = 3; |
---|
| 1399 | (*t1)->culled = (*t2)->culled = quad->culled; |
---|
| 1400 | (*t1)->offset = (*t2)->offset = quad->offset; |
---|
| 1401 | (*t1)->pattern = (*t2)->pattern = quad->pattern; |
---|
| 1402 | (*t1)->factor = (*t2)->factor = quad->factor; |
---|
| 1403 | (*t1)->width = (*t2)->width = quad->width; |
---|
| 1404 | (*t1)->verts = (GL2PSvertex*)gl2psMalloc(3 * sizeof(GL2PSvertex)); |
---|
| 1405 | (*t2)->verts = (GL2PSvertex*)gl2psMalloc(3 * sizeof(GL2PSvertex)); |
---|
| 1406 | (*t1)->verts[0] = quad->verts[0]; |
---|
| 1407 | (*t1)->verts[1] = quad->verts[1]; |
---|
| 1408 | (*t1)->verts[2] = quad->verts[2]; |
---|
| 1409 | (*t1)->boundary = ((quad->boundary & 1) ? 1 : 0) | ((quad->boundary & 2) ? 2 : 0); |
---|
| 1410 | (*t2)->verts[0] = quad->verts[0]; |
---|
| 1411 | (*t2)->verts[1] = quad->verts[2]; |
---|
| 1412 | (*t2)->verts[2] = quad->verts[3]; |
---|
| 1413 | (*t2)->boundary = ((quad->boundary & 4) ? 2 : 0) | ((quad->boundary & 4) ? 2 : 0); |
---|
| 1414 | } |
---|
| 1415 | |
---|
| 1416 | static int gl2psCompareDepth(const void *a, const void *b) |
---|
| 1417 | { |
---|
| 1418 | GL2PSprimitive *q, *w; |
---|
| 1419 | GLfloat dq = 0.0F, dw = 0.0F, diff; |
---|
| 1420 | int i; |
---|
| 1421 | |
---|
| 1422 | q = *(GL2PSprimitive**)a; |
---|
| 1423 | w = *(GL2PSprimitive**)b; |
---|
| 1424 | |
---|
| 1425 | for(i = 0; i < q->numverts; i++){ |
---|
| 1426 | dq += q->verts[i].xyz[2]; |
---|
| 1427 | } |
---|
| 1428 | dq /= (GLfloat)q->numverts; |
---|
| 1429 | |
---|
| 1430 | for(i = 0; i < w->numverts; i++){ |
---|
| 1431 | dw += w->verts[i].xyz[2]; |
---|
| 1432 | } |
---|
| 1433 | dw /= (GLfloat)w->numverts; |
---|
| 1434 | |
---|
| 1435 | diff = dq - dw; |
---|
| 1436 | if(diff > 0.){ |
---|
| 1437 | return -1; |
---|
| 1438 | } |
---|
| 1439 | else if(diff < 0.){ |
---|
| 1440 | return 1; |
---|
| 1441 | } |
---|
| 1442 | else{ |
---|
| 1443 | return 0; |
---|
| 1444 | } |
---|
| 1445 | } |
---|
| 1446 | |
---|
| 1447 | static int gl2psTrianglesFirst(const void *a, const void *b) |
---|
| 1448 | { |
---|
| 1449 | GL2PSprimitive *q, *w; |
---|
| 1450 | |
---|
| 1451 | q = *(GL2PSprimitive**)a; |
---|
| 1452 | w = *(GL2PSprimitive**)b; |
---|
| 1453 | return(q->type < w->type ? 1 : -1); |
---|
| 1454 | } |
---|
| 1455 | |
---|
| 1456 | static GLint gl2psFindRoot(GL2PSlist *primitives, GL2PSprimitive **root) |
---|
| 1457 | { |
---|
| 1458 | GLint i, j, count, best = 1000000, index = 0; |
---|
| 1459 | GL2PSprimitive *prim1, *prim2; |
---|
| 1460 | GL2PSplane plane; |
---|
| 1461 | GLint maxp; |
---|
| 1462 | |
---|
| 1463 | if(!gl2psListNbr(primitives)){ |
---|
| 1464 | gl2psMsg(GL2PS_ERROR, "Cannot fint root in empty primitive list"); |
---|
| 1465 | return 0; |
---|
| 1466 | } |
---|
| 1467 | |
---|
| 1468 | *root = *(GL2PSprimitive**)gl2psListPointer(primitives, 0); |
---|
| 1469 | |
---|
| 1470 | if(gl2ps->options & GL2PS_BEST_ROOT){ |
---|
| 1471 | maxp = gl2psListNbr(primitives); |
---|
| 1472 | if(maxp > gl2ps->maxbestroot){ |
---|
| 1473 | maxp = gl2ps->maxbestroot; |
---|
| 1474 | } |
---|
| 1475 | for(i = 0; i < maxp; i++){ |
---|
| 1476 | prim1 = *(GL2PSprimitive**)gl2psListPointer(primitives, i); |
---|
| 1477 | gl2psGetPlane(prim1, plane); |
---|
| 1478 | count = 0; |
---|
| 1479 | for(j = 0; j < gl2psListNbr(primitives); j++){ |
---|
| 1480 | if(j != i){ |
---|
| 1481 | prim2 = *(GL2PSprimitive**)gl2psListPointer(primitives, j); |
---|
| 1482 | count += gl2psTestSplitPrimitive(prim2, plane); |
---|
| 1483 | } |
---|
| 1484 | if(count > best) break; |
---|
| 1485 | } |
---|
| 1486 | if(count < best){ |
---|
| 1487 | best = count; |
---|
| 1488 | index = i; |
---|
| 1489 | *root = prim1; |
---|
| 1490 | if(!count) return index; |
---|
| 1491 | } |
---|
| 1492 | } |
---|
| 1493 | /* if(index) gl2psMsg(GL2PS_INFO, "GL2PS_BEST_ROOT was worth it: %d", index); */ |
---|
| 1494 | return index; |
---|
| 1495 | } |
---|
| 1496 | else{ |
---|
| 1497 | return 0; |
---|
| 1498 | } |
---|
| 1499 | } |
---|
| 1500 | |
---|
| 1501 | static void gl2psFreeImagemap(GL2PSimagemap *list){ |
---|
| 1502 | GL2PSimagemap *next; |
---|
| 1503 | while(list != NULL){ |
---|
| 1504 | next = list->next; |
---|
| 1505 | gl2psFree(list->image->pixels); |
---|
| 1506 | gl2psFree(list->image); |
---|
| 1507 | gl2psFree(list); |
---|
| 1508 | list = next; |
---|
| 1509 | } |
---|
| 1510 | } |
---|
| 1511 | |
---|
| 1512 | static void gl2psFreePrimitive(void *data) |
---|
| 1513 | { |
---|
| 1514 | GL2PSprimitive *q; |
---|
| 1515 | |
---|
| 1516 | q = *(GL2PSprimitive**)data; |
---|
| 1517 | gl2psFree(q->verts); |
---|
| 1518 | if(q->type == GL2PS_TEXT || q->type == GL2PS_SPECIAL){ |
---|
| 1519 | gl2psFreeText(q->data.text); |
---|
| 1520 | } |
---|
| 1521 | else if(q->type == GL2PS_PIXMAP){ |
---|
| 1522 | gl2psFreePixmap(q->data.image); |
---|
| 1523 | } |
---|
| 1524 | gl2psFree(q); |
---|
| 1525 | } |
---|
| 1526 | |
---|
| 1527 | static void gl2psAddPrimitiveInList(GL2PSprimitive *prim, GL2PSlist *list) |
---|
| 1528 | { |
---|
| 1529 | GL2PSprimitive *t1, *t2; |
---|
| 1530 | |
---|
| 1531 | if(prim->type != GL2PS_QUADRANGLE){ |
---|
| 1532 | gl2psListAdd(list, &prim); |
---|
| 1533 | } |
---|
| 1534 | else{ |
---|
| 1535 | gl2psDivideQuad(prim, &t1, &t2); |
---|
| 1536 | gl2psListAdd(list, &t1); |
---|
| 1537 | gl2psListAdd(list, &t2); |
---|
| 1538 | gl2psFreePrimitive(&prim); |
---|
| 1539 | } |
---|
| 1540 | |
---|
| 1541 | } |
---|
| 1542 | |
---|
| 1543 | static void gl2psFreeBspTree(GL2PSbsptree **tree) |
---|
| 1544 | { |
---|
| 1545 | if(*tree){ |
---|
| 1546 | if((*tree)->back) gl2psFreeBspTree(&(*tree)->back); |
---|
| 1547 | if((*tree)->primitives){ |
---|
| 1548 | gl2psListAction((*tree)->primitives, gl2psFreePrimitive); |
---|
| 1549 | gl2psListDelete((*tree)->primitives); |
---|
| 1550 | } |
---|
| 1551 | if((*tree)->front) gl2psFreeBspTree(&(*tree)->front); |
---|
| 1552 | gl2psFree(*tree); |
---|
| 1553 | *tree = NULL; |
---|
| 1554 | } |
---|
| 1555 | } |
---|
| 1556 | |
---|
| 1557 | static GLboolean gl2psGreater(GLfloat f1, GLfloat f2) |
---|
| 1558 | { |
---|
| 1559 | if(f1 > f2) return GL_TRUE; |
---|
| 1560 | else return GL_FALSE; |
---|
| 1561 | } |
---|
| 1562 | |
---|
| 1563 | static GLboolean gl2psLess(GLfloat f1, GLfloat f2) |
---|
| 1564 | { |
---|
| 1565 | if(f1 < f2) return GL_TRUE; |
---|
| 1566 | else return GL_FALSE; |
---|
| 1567 | } |
---|
| 1568 | |
---|
| 1569 | static void gl2psBuildBspTree(GL2PSbsptree *tree, GL2PSlist *primitives) |
---|
| 1570 | { |
---|
| 1571 | GL2PSprimitive *prim, *frontprim = NULL, *backprim = NULL; |
---|
| 1572 | GL2PSlist *frontlist, *backlist; |
---|
| 1573 | GLint i, index; |
---|
| 1574 | |
---|
| 1575 | tree->front = NULL; |
---|
| 1576 | tree->back = NULL; |
---|
| 1577 | tree->primitives = gl2psListCreate(1, 2, sizeof(GL2PSprimitive*)); |
---|
| 1578 | index = gl2psFindRoot(primitives, &prim); |
---|
| 1579 | gl2psGetPlane(prim, tree->plane); |
---|
| 1580 | gl2psAddPrimitiveInList(prim, tree->primitives); |
---|
| 1581 | |
---|
| 1582 | frontlist = gl2psListCreate(1, 2, sizeof(GL2PSprimitive*)); |
---|
| 1583 | backlist = gl2psListCreate(1, 2, sizeof(GL2PSprimitive*)); |
---|
| 1584 | |
---|
| 1585 | for(i = 0; i < gl2psListNbr(primitives); i++){ |
---|
| 1586 | if(i != index){ |
---|
| 1587 | prim = *(GL2PSprimitive**)gl2psListPointer(primitives,i); |
---|
| 1588 | switch(gl2psSplitPrimitive(prim, tree->plane, &frontprim, &backprim)){ |
---|
| 1589 | case GL2PS_COINCIDENT: |
---|
| 1590 | gl2psAddPrimitiveInList(prim, tree->primitives); |
---|
| 1591 | break; |
---|
| 1592 | case GL2PS_IN_BACK_OF: |
---|
| 1593 | gl2psAddPrimitiveInList(prim, backlist); |
---|
| 1594 | break; |
---|
| 1595 | case GL2PS_IN_FRONT_OF: |
---|
| 1596 | gl2psAddPrimitiveInList(prim, frontlist); |
---|
| 1597 | break; |
---|
| 1598 | case GL2PS_SPANNING: |
---|
| 1599 | gl2psAddPrimitiveInList(backprim, backlist); |
---|
| 1600 | gl2psAddPrimitiveInList(frontprim, frontlist); |
---|
| 1601 | gl2psFreePrimitive(&prim); |
---|
| 1602 | break; |
---|
| 1603 | } |
---|
| 1604 | } |
---|
| 1605 | } |
---|
| 1606 | |
---|
| 1607 | if(gl2psListNbr(tree->primitives)){ |
---|
| 1608 | gl2psListSort(tree->primitives, gl2psTrianglesFirst); |
---|
| 1609 | } |
---|
| 1610 | |
---|
| 1611 | if(gl2psListNbr(frontlist)){ |
---|
| 1612 | gl2psListSort(frontlist, gl2psTrianglesFirst); |
---|
| 1613 | tree->front = (GL2PSbsptree*)gl2psMalloc(sizeof(GL2PSbsptree)); |
---|
| 1614 | gl2psBuildBspTree(tree->front, frontlist); |
---|
| 1615 | } |
---|
| 1616 | else{ |
---|
| 1617 | gl2psListDelete(frontlist); |
---|
| 1618 | } |
---|
| 1619 | |
---|
| 1620 | if(gl2psListNbr(backlist)){ |
---|
| 1621 | gl2psListSort(backlist, gl2psTrianglesFirst); |
---|
| 1622 | tree->back = (GL2PSbsptree*)gl2psMalloc(sizeof(GL2PSbsptree)); |
---|
| 1623 | gl2psBuildBspTree(tree->back, backlist); |
---|
| 1624 | } |
---|
| 1625 | else{ |
---|
| 1626 | gl2psListDelete(backlist); |
---|
| 1627 | } |
---|
| 1628 | |
---|
| 1629 | gl2psListDelete(primitives); |
---|
| 1630 | } |
---|
| 1631 | |
---|
| 1632 | static void gl2psTraverseBspTree(GL2PSbsptree *tree, GL2PSxyz eye, GLfloat epsilon, |
---|
| 1633 | GLboolean (*compare)(GLfloat f1, GLfloat f2), |
---|
| 1634 | void (*action)(void *data), int inverse) |
---|
| 1635 | { |
---|
| 1636 | GLfloat result; |
---|
| 1637 | |
---|
| 1638 | if(!tree) return; |
---|
| 1639 | |
---|
| 1640 | result = gl2psComparePointPlane(eye, tree->plane); |
---|
| 1641 | |
---|
| 1642 | if(GL_TRUE == compare(result, epsilon)){ |
---|
| 1643 | gl2psTraverseBspTree(tree->back, eye, epsilon, compare, action, inverse); |
---|
| 1644 | if(inverse){ |
---|
| 1645 | gl2psListActionInverse(tree->primitives, action); |
---|
| 1646 | } |
---|
| 1647 | else{ |
---|
| 1648 | gl2psListAction(tree->primitives, action); |
---|
| 1649 | } |
---|
| 1650 | gl2psTraverseBspTree(tree->front, eye, epsilon, compare, action, inverse); |
---|
| 1651 | } |
---|
| 1652 | else if(GL_TRUE == compare(-epsilon, result)){ |
---|
| 1653 | gl2psTraverseBspTree(tree->front, eye, epsilon, compare, action, inverse); |
---|
| 1654 | if(inverse){ |
---|
| 1655 | gl2psListActionInverse(tree->primitives, action); |
---|
| 1656 | } |
---|
| 1657 | else{ |
---|
| 1658 | gl2psListAction(tree->primitives, action); |
---|
| 1659 | } |
---|
| 1660 | gl2psTraverseBspTree(tree->back, eye, epsilon, compare, action, inverse); |
---|
| 1661 | } |
---|
| 1662 | else{ |
---|
| 1663 | gl2psTraverseBspTree(tree->front, eye, epsilon, compare, action, inverse); |
---|
| 1664 | gl2psTraverseBspTree(tree->back, eye, epsilon, compare, action, inverse); |
---|
| 1665 | } |
---|
| 1666 | } |
---|
| 1667 | |
---|
| 1668 | static void gl2psRescaleAndOffset() |
---|
| 1669 | { |
---|
| 1670 | GL2PSprimitive *prim; |
---|
| 1671 | GLfloat minZ, maxZ, rangeZ, scaleZ; |
---|
| 1672 | GLfloat factor, units, area, dZ, dZdX, dZdY, maxdZ; |
---|
| 1673 | int i, j; |
---|
| 1674 | |
---|
| 1675 | if(!gl2psListNbr(gl2ps->primitives)) |
---|
| 1676 | return; |
---|
| 1677 | |
---|
| 1678 | /* get z-buffer range */ |
---|
| 1679 | prim = *(GL2PSprimitive**)gl2psListPointer(gl2ps->primitives, 0); |
---|
| 1680 | minZ = maxZ = prim->verts[0].xyz[2]; |
---|
| 1681 | for(i = 1; i < prim->numverts; i++){ |
---|
| 1682 | if(prim->verts[i].xyz[2] < minZ) minZ = prim->verts[i].xyz[2]; |
---|
| 1683 | if(prim->verts[i].xyz[2] > maxZ) maxZ = prim->verts[i].xyz[2]; |
---|
| 1684 | } |
---|
| 1685 | for(i = 1; i < gl2psListNbr(gl2ps->primitives); i++){ |
---|
| 1686 | prim = *(GL2PSprimitive**)gl2psListPointer(gl2ps->primitives, i); |
---|
| 1687 | for(j = 0; j < prim->numverts; j++){ |
---|
| 1688 | if(prim->verts[j].xyz[2] < minZ) minZ = prim->verts[j].xyz[2]; |
---|
| 1689 | if(prim->verts[j].xyz[2] > maxZ) maxZ = prim->verts[j].xyz[2]; |
---|
| 1690 | } |
---|
| 1691 | } |
---|
| 1692 | rangeZ = (maxZ - minZ); |
---|
| 1693 | |
---|
| 1694 | /* rescale z-buffer coordinate in [0,GL2PS_ZSCALE], to make it of |
---|
| 1695 | the same order of magnitude as the x and y coordinates */ |
---|
| 1696 | scaleZ = GL2PS_ZERO(rangeZ) ? GL2PS_ZSCALE : (GL2PS_ZSCALE / rangeZ); |
---|
| 1697 | /* avoid precision loss (we use floats!) */ |
---|
| 1698 | if(scaleZ > 100000.F) scaleZ = 100000.F; |
---|
| 1699 | |
---|
| 1700 | /* apply offsets */ |
---|
| 1701 | for(i = 0; i < gl2psListNbr(gl2ps->primitives); i++){ |
---|
| 1702 | prim = *(GL2PSprimitive**)gl2psListPointer(gl2ps->primitives, i); |
---|
| 1703 | for(j = 0; j < prim->numverts; j++){ |
---|
| 1704 | prim->verts[j].xyz[2] = (prim->verts[j].xyz[2] - minZ) * scaleZ; |
---|
| 1705 | } |
---|
| 1706 | if((gl2ps->options & GL2PS_SIMPLE_LINE_OFFSET) && |
---|
| 1707 | (prim->type == GL2PS_LINE)){ |
---|
| 1708 | if(gl2ps->sort == GL2PS_SIMPLE_SORT){ |
---|
| 1709 | prim->verts[0].xyz[2] -= GL2PS_ZOFFSET_LARGE; |
---|
| 1710 | prim->verts[1].xyz[2] -= GL2PS_ZOFFSET_LARGE; |
---|
| 1711 | } |
---|
| 1712 | else{ |
---|
| 1713 | prim->verts[0].xyz[2] -= GL2PS_ZOFFSET; |
---|
| 1714 | prim->verts[1].xyz[2] -= GL2PS_ZOFFSET; |
---|
| 1715 | } |
---|
| 1716 | } |
---|
| 1717 | else if(prim->offset && (prim->type == GL2PS_TRIANGLE)){ |
---|
| 1718 | factor = gl2ps->offset[0]; |
---|
| 1719 | units = gl2ps->offset[1]; |
---|
| 1720 | area = |
---|
| 1721 | (prim->verts[1].xyz[0] - prim->verts[0].xyz[0]) * |
---|
| 1722 | (prim->verts[2].xyz[1] - prim->verts[1].xyz[1]) - |
---|
| 1723 | (prim->verts[2].xyz[0] - prim->verts[1].xyz[0]) * |
---|
| 1724 | (prim->verts[1].xyz[1] - prim->verts[0].xyz[1]); |
---|
| 1725 | if(!GL2PS_ZERO(area)){ |
---|
| 1726 | dZdX = |
---|
| 1727 | ((prim->verts[2].xyz[1] - prim->verts[1].xyz[1]) * |
---|
| 1728 | (prim->verts[1].xyz[2] - prim->verts[0].xyz[2]) - |
---|
| 1729 | (prim->verts[1].xyz[1] - prim->verts[0].xyz[1]) * |
---|
| 1730 | (prim->verts[2].xyz[2] - prim->verts[1].xyz[2])) / area; |
---|
| 1731 | dZdY = |
---|
| 1732 | ((prim->verts[1].xyz[0] - prim->verts[0].xyz[0]) * |
---|
| 1733 | (prim->verts[2].xyz[2] - prim->verts[1].xyz[2]) - |
---|
| 1734 | (prim->verts[2].xyz[0] - prim->verts[1].xyz[0]) * |
---|
| 1735 | (prim->verts[1].xyz[2] - prim->verts[0].xyz[2])) / area; |
---|
| 1736 | maxdZ = (GLfloat)sqrt(dZdX * dZdX + dZdY * dZdY); |
---|
| 1737 | } |
---|
| 1738 | else{ |
---|
| 1739 | maxdZ = 0.0F; |
---|
| 1740 | } |
---|
| 1741 | dZ = factor * maxdZ + units; |
---|
| 1742 | prim->verts[0].xyz[2] += dZ; |
---|
| 1743 | prim->verts[1].xyz[2] += dZ; |
---|
| 1744 | prim->verts[2].xyz[2] += dZ; |
---|
| 1745 | } |
---|
| 1746 | } |
---|
| 1747 | } |
---|
| 1748 | |
---|
| 1749 | /********************************************************************* |
---|
| 1750 | * |
---|
| 1751 | * 2D sorting routines (for occlusion culling) |
---|
| 1752 | * |
---|
| 1753 | *********************************************************************/ |
---|
| 1754 | |
---|
| 1755 | static GLint gl2psGetPlaneFromPoints(GL2PSxyz a, GL2PSxyz b, GL2PSplane plane) |
---|
| 1756 | { |
---|
| 1757 | GLfloat n; |
---|
| 1758 | |
---|
| 1759 | plane[0] = b[1] - a[1]; |
---|
| 1760 | plane[1] = a[0] - b[0]; |
---|
| 1761 | n = (GLfloat)sqrt(plane[0]*plane[0] + plane[1]*plane[1]); |
---|
| 1762 | plane[2] = 0.0F; |
---|
| 1763 | if(!GL2PS_ZERO(n)){ |
---|
| 1764 | plane[0] /= n; |
---|
| 1765 | plane[1] /= n; |
---|
| 1766 | plane[3] = -plane[0]*a[0]-plane[1]*a[1]; |
---|
| 1767 | return 1; |
---|
| 1768 | } |
---|
| 1769 | else{ |
---|
| 1770 | plane[0] = -1.0F; |
---|
| 1771 | plane[1] = 0.0F; |
---|
| 1772 | plane[3] = a[0]; |
---|
| 1773 | return 0; |
---|
| 1774 | } |
---|
| 1775 | } |
---|
| 1776 | |
---|
| 1777 | static void gl2psFreeBspImageTree(GL2PSbsptree2d **tree) |
---|
| 1778 | { |
---|
| 1779 | if(*tree){ |
---|
| 1780 | if((*tree)->back) gl2psFreeBspImageTree(&(*tree)->back); |
---|
| 1781 | if((*tree)->front) gl2psFreeBspImageTree(&(*tree)->front); |
---|
| 1782 | gl2psFree(*tree); |
---|
| 1783 | *tree = NULL; |
---|
| 1784 | } |
---|
| 1785 | } |
---|
| 1786 | |
---|
| 1787 | static GLint gl2psCheckPoint(GL2PSxyz point, GL2PSplane plane) |
---|
| 1788 | { |
---|
| 1789 | GLfloat pt_dis; |
---|
| 1790 | |
---|
| 1791 | pt_dis = gl2psComparePointPlane(point, plane); |
---|
| 1792 | if(pt_dis > GL2PS_EPSILON) return GL2PS_POINT_INFRONT; |
---|
| 1793 | else if(pt_dis < -GL2PS_EPSILON) return GL2PS_POINT_BACK; |
---|
| 1794 | else return GL2PS_POINT_COINCIDENT; |
---|
| 1795 | } |
---|
| 1796 | |
---|
| 1797 | static void gl2psAddPlanesInBspTreeImage(GL2PSprimitive *prim, |
---|
| 1798 | GL2PSbsptree2d **tree) |
---|
| 1799 | { |
---|
| 1800 | GLint ret = 0; |
---|
| 1801 | GLint i; |
---|
| 1802 | GLint offset = 0; |
---|
| 1803 | GL2PSbsptree2d *head = NULL, *cur = NULL; |
---|
| 1804 | |
---|
| 1805 | if((*tree == NULL) && (prim->numverts > 2)){ |
---|
| 1806 | /* don't cull if transparent |
---|
| 1807 | for(i = 0; i < prim->numverts - 1; i++) |
---|
| 1808 | if(prim->verts[i].rgba[3] < 1.0F) return; |
---|
| 1809 | */ |
---|
| 1810 | head = (GL2PSbsptree2d*)gl2psMalloc(sizeof(GL2PSbsptree2d)); |
---|
| 1811 | for(i = 0; i < prim->numverts-1; i++){ |
---|
| 1812 | if(!gl2psGetPlaneFromPoints(prim->verts[i].xyz, |
---|
| 1813 | prim->verts[i+1].xyz, |
---|
| 1814 | head->plane)){ |
---|
| 1815 | if(prim->numverts-i > 3){ |
---|
| 1816 | offset++; |
---|
| 1817 | } |
---|
| 1818 | else{ |
---|
| 1819 | gl2psFree(head); |
---|
| 1820 | return; |
---|
| 1821 | } |
---|
| 1822 | } |
---|
| 1823 | else{ |
---|
| 1824 | break; |
---|
| 1825 | } |
---|
| 1826 | } |
---|
| 1827 | head->back = NULL; |
---|
| 1828 | head->front = NULL; |
---|
| 1829 | for(i = 2+offset; i < prim->numverts; i++){ |
---|
| 1830 | ret = gl2psCheckPoint(prim->verts[i].xyz, head->plane); |
---|
| 1831 | if(ret != GL2PS_POINT_COINCIDENT) break; |
---|
| 1832 | } |
---|
| 1833 | switch(ret){ |
---|
| 1834 | case GL2PS_POINT_INFRONT : |
---|
| 1835 | cur = head; |
---|
| 1836 | for(i = 1+offset; i < prim->numverts-1; i++){ |
---|
| 1837 | if(cur->front == NULL){ |
---|
| 1838 | cur->front = (GL2PSbsptree2d*)gl2psMalloc(sizeof(GL2PSbsptree2d)); |
---|
| 1839 | } |
---|
| 1840 | if(gl2psGetPlaneFromPoints(prim->verts[i].xyz, |
---|
| 1841 | prim->verts[i+1].xyz, |
---|
| 1842 | cur->front->plane)){ |
---|
| 1843 | cur = cur->front; |
---|
| 1844 | cur->front = NULL; |
---|
| 1845 | cur->back = NULL; |
---|
| 1846 | } |
---|
| 1847 | } |
---|
| 1848 | if(cur->front == NULL){ |
---|
| 1849 | cur->front = (GL2PSbsptree2d*)gl2psMalloc(sizeof(GL2PSbsptree2d)); |
---|
| 1850 | } |
---|
| 1851 | if(gl2psGetPlaneFromPoints(prim->verts[i].xyz, |
---|
| 1852 | prim->verts[offset].xyz, |
---|
| 1853 | cur->front->plane)){ |
---|
| 1854 | cur->front->front = NULL; |
---|
| 1855 | cur->front->back = NULL; |
---|
| 1856 | } |
---|
| 1857 | else{ |
---|
| 1858 | gl2psFree(cur->front); |
---|
| 1859 | cur->front = NULL; |
---|
| 1860 | } |
---|
| 1861 | break; |
---|
| 1862 | case GL2PS_POINT_BACK : |
---|
| 1863 | for(i = 0; i < 4; i++){ |
---|
| 1864 | head->plane[i] = -head->plane[i]; |
---|
| 1865 | } |
---|
| 1866 | cur = head; |
---|
| 1867 | for(i = 1+offset; i < prim->numverts-1; i++){ |
---|
| 1868 | if(cur->front == NULL){ |
---|
| 1869 | cur->front = (GL2PSbsptree2d*)gl2psMalloc(sizeof(GL2PSbsptree2d)); |
---|
| 1870 | } |
---|
| 1871 | if(gl2psGetPlaneFromPoints(prim->verts[i+1].xyz, |
---|
| 1872 | prim->verts[i].xyz, |
---|
| 1873 | cur->front->plane)){ |
---|
| 1874 | cur = cur->front; |
---|
| 1875 | cur->front = NULL; |
---|
| 1876 | cur->back = NULL; |
---|
| 1877 | } |
---|
| 1878 | } |
---|
| 1879 | if(cur->front == NULL){ |
---|
| 1880 | cur->front = (GL2PSbsptree2d*)gl2psMalloc(sizeof(GL2PSbsptree2d)); |
---|
| 1881 | } |
---|
| 1882 | if(gl2psGetPlaneFromPoints(prim->verts[offset].xyz, |
---|
| 1883 | prim->verts[i].xyz, |
---|
| 1884 | cur->front->plane)){ |
---|
| 1885 | cur->front->front = NULL; |
---|
| 1886 | cur->front->back = NULL; |
---|
| 1887 | } |
---|
| 1888 | else{ |
---|
| 1889 | gl2psFree(cur->front); |
---|
| 1890 | cur->front = NULL; |
---|
| 1891 | } |
---|
| 1892 | break; |
---|
| 1893 | default: |
---|
| 1894 | gl2psFree(head); |
---|
| 1895 | return; |
---|
| 1896 | } |
---|
| 1897 | (*tree) = head; |
---|
| 1898 | } |
---|
| 1899 | } |
---|
| 1900 | |
---|
| 1901 | static GLint gl2psCheckPrimitive(GL2PSprimitive *prim, GL2PSplane plane) |
---|
| 1902 | { |
---|
| 1903 | GLint i; |
---|
| 1904 | GLint pos; |
---|
| 1905 | |
---|
| 1906 | pos = gl2psCheckPoint(prim->verts[0].xyz, plane); |
---|
| 1907 | for(i = 1; i < prim->numverts; i++){ |
---|
| 1908 | pos |= gl2psCheckPoint(prim->verts[i].xyz, plane); |
---|
| 1909 | if(pos == (GL2PS_POINT_INFRONT | GL2PS_POINT_BACK)) return GL2PS_SPANNING; |
---|
| 1910 | } |
---|
| 1911 | if(pos & GL2PS_POINT_INFRONT) return GL2PS_IN_FRONT_OF; |
---|
| 1912 | else if(pos & GL2PS_POINT_BACK) return GL2PS_IN_BACK_OF; |
---|
| 1913 | else return GL2PS_COINCIDENT; |
---|
| 1914 | } |
---|
| 1915 | |
---|
| 1916 | static GL2PSprimitive *gl2psCreateSplitPrimitive2D(GL2PSprimitive *parent, |
---|
| 1917 | GLshort numverts, |
---|
| 1918 | GL2PSvertex *vertx) |
---|
| 1919 | { |
---|
| 1920 | GLint i; |
---|
| 1921 | GL2PSprimitive *child = (GL2PSprimitive*)gl2psMalloc(sizeof(GL2PSprimitive)); |
---|
| 1922 | |
---|
| 1923 | if(parent->type == GL2PS_IMAGEMAP){ |
---|
| 1924 | child->type = GL2PS_IMAGEMAP; |
---|
| 1925 | child->data.image = parent->data.image; |
---|
| 1926 | } |
---|
| 1927 | else { |
---|
| 1928 | switch(numverts){ |
---|
| 1929 | case 1 : child->type = GL2PS_POINT; break; |
---|
| 1930 | case 2 : child->type = GL2PS_LINE; break; |
---|
| 1931 | case 3 : child->type = GL2PS_TRIANGLE; break; |
---|
| 1932 | case 4 : child->type = GL2PS_QUADRANGLE; break; |
---|
| 1933 | default: child->type = GL2PS_NO_TYPE; break; /* FIXME */ |
---|
| 1934 | } |
---|
| 1935 | } |
---|
| 1936 | child->boundary = 0; /* FIXME: not done! */ |
---|
| 1937 | child->culled = parent->culled; |
---|
| 1938 | child->offset = parent->offset; |
---|
| 1939 | child->pattern = parent->pattern; |
---|
| 1940 | child->factor = parent->factor; |
---|
| 1941 | child->width = parent->width; |
---|
| 1942 | child->numverts = numverts; |
---|
| 1943 | child->verts = (GL2PSvertex*)gl2psMalloc(numverts * sizeof(GL2PSvertex)); |
---|
| 1944 | for(i = 0; i < numverts; i++){ |
---|
| 1945 | child->verts[i] = vertx[i]; |
---|
| 1946 | } |
---|
| 1947 | return child; |
---|
| 1948 | } |
---|
| 1949 | |
---|
| 1950 | static void gl2psSplitPrimitive2D(GL2PSprimitive *prim, |
---|
| 1951 | GL2PSplane plane, |
---|
| 1952 | GL2PSprimitive **front, |
---|
| 1953 | GL2PSprimitive **back) |
---|
| 1954 | { |
---|
| 1955 | /* cur will hold the position of the current vertex |
---|
| 1956 | prev will hold the position of the previous vertex |
---|
| 1957 | prev0 will hold the position of the vertex number 0 |
---|
| 1958 | v1 and v2 represent the current and previous vertices, respectively |
---|
| 1959 | flag is set if the current vertex should be checked against the plane */ |
---|
| 1960 | GLint cur = -1, prev = -1, i, v1 = 0, v2 = 0, flag = 1, prev0 = -1; |
---|
| 1961 | |
---|
| 1962 | /* list of vertices that will go in front and back primitive */ |
---|
| 1963 | GL2PSvertex *front_list = NULL, *back_list = NULL; |
---|
| 1964 | |
---|
| 1965 | /* number of vertices in front and back list */ |
---|
| 1966 | GLshort front_count = 0, back_count = 0; |
---|
| 1967 | |
---|
| 1968 | for(i = 0; i <= prim->numverts; i++){ |
---|
| 1969 | v1 = i; |
---|
| 1970 | if(v1 == prim->numverts){ |
---|
| 1971 | if(prim->numverts < 3) break; |
---|
| 1972 | v1 = 0; |
---|
| 1973 | v2 = prim->numverts - 1; |
---|
| 1974 | cur = prev0; |
---|
| 1975 | } |
---|
| 1976 | else if(flag){ |
---|
| 1977 | cur = gl2psCheckPoint(prim->verts[v1].xyz, plane); |
---|
| 1978 | if(i == 0){ |
---|
| 1979 | prev0 = cur; |
---|
| 1980 | } |
---|
| 1981 | } |
---|
| 1982 | if(((prev == -1) || (prev == cur) || (prev == 0) || (cur == 0)) && |
---|
| 1983 | (i < prim->numverts)){ |
---|
| 1984 | if(cur == GL2PS_POINT_INFRONT){ |
---|
| 1985 | front_count++; |
---|
| 1986 | front_list = (GL2PSvertex*)gl2psRealloc(front_list, |
---|
| 1987 | sizeof(GL2PSvertex)*front_count); |
---|
| 1988 | front_list[front_count-1] = prim->verts[v1]; |
---|
| 1989 | } |
---|
| 1990 | else if(cur == GL2PS_POINT_BACK){ |
---|
| 1991 | back_count++; |
---|
| 1992 | back_list = (GL2PSvertex*)gl2psRealloc(back_list, |
---|
| 1993 | sizeof(GL2PSvertex)*back_count); |
---|
| 1994 | back_list[back_count-1] = prim->verts[v1]; |
---|
| 1995 | } |
---|
| 1996 | else{ |
---|
| 1997 | front_count++; |
---|
| 1998 | front_list = (GL2PSvertex*)gl2psRealloc(front_list, |
---|
| 1999 | sizeof(GL2PSvertex)*front_count); |
---|
| 2000 | front_list[front_count-1] = prim->verts[v1]; |
---|
| 2001 | back_count++; |
---|
| 2002 | back_list = (GL2PSvertex*)gl2psRealloc(back_list, |
---|
| 2003 | sizeof(GL2PSvertex)*back_count); |
---|
| 2004 | back_list[back_count-1] = prim->verts[v1]; |
---|
| 2005 | } |
---|
| 2006 | flag = 1; |
---|
| 2007 | } |
---|
| 2008 | else if((prev != cur) && (cur != 0) && (prev != 0)){ |
---|
| 2009 | if(v1 != 0){ |
---|
| 2010 | v2 = v1-1; |
---|
| 2011 | i--; |
---|
| 2012 | } |
---|
| 2013 | front_count++; |
---|
| 2014 | front_list = (GL2PSvertex*)gl2psRealloc(front_list, |
---|
| 2015 | sizeof(GL2PSvertex)*front_count); |
---|
| 2016 | gl2psCutEdge(&prim->verts[v2], &prim->verts[v1], |
---|
| 2017 | plane, &front_list[front_count-1]); |
---|
| 2018 | back_count++; |
---|
| 2019 | back_list = (GL2PSvertex*)gl2psRealloc(back_list, |
---|
| 2020 | sizeof(GL2PSvertex)*back_count); |
---|
| 2021 | back_list[back_count-1] = front_list[front_count-1]; |
---|
| 2022 | flag = 0; |
---|
| 2023 | } |
---|
| 2024 | prev = cur; |
---|
| 2025 | } |
---|
| 2026 | *front = gl2psCreateSplitPrimitive2D(prim, front_count, front_list); |
---|
| 2027 | *back = gl2psCreateSplitPrimitive2D(prim, back_count, back_list); |
---|
| 2028 | gl2psFree(front_list); |
---|
| 2029 | gl2psFree(back_list); |
---|
| 2030 | } |
---|
| 2031 | |
---|
| 2032 | static GLint gl2psAddInBspImageTree(GL2PSprimitive *prim, GL2PSbsptree2d **tree) |
---|
| 2033 | { |
---|
| 2034 | GLint ret = 0; |
---|
| 2035 | GL2PSprimitive *frontprim = NULL, *backprim = NULL; |
---|
| 2036 | |
---|
| 2037 | /* FIXME: until we consider the actual extent of text strings and |
---|
| 2038 | pixmaps, never cull them. Otherwise the whole string/pixmap gets |
---|
| 2039 | culled as soon as the reference point is hidden */ |
---|
| 2040 | if(prim->type == GL2PS_PIXMAP || |
---|
| 2041 | prim->type == GL2PS_TEXT || |
---|
| 2042 | prim->type == GL2PS_SPECIAL){ |
---|
| 2043 | return 1; |
---|
| 2044 | } |
---|
| 2045 | |
---|
| 2046 | if(*tree == NULL){ |
---|
| 2047 | if((prim->type != GL2PS_IMAGEMAP) && (GL_FALSE == gl2ps->zerosurfacearea)){ |
---|
| 2048 | gl2psAddPlanesInBspTreeImage(gl2ps->primitivetoadd, tree); |
---|
| 2049 | } |
---|
| 2050 | return 1; |
---|
| 2051 | } |
---|
| 2052 | else{ |
---|
| 2053 | switch(gl2psCheckPrimitive(prim, (*tree)->plane)){ |
---|
| 2054 | case GL2PS_IN_BACK_OF: return gl2psAddInBspImageTree(prim, &(*tree)->back); |
---|
| 2055 | case GL2PS_IN_FRONT_OF: |
---|
| 2056 | if((*tree)->front != NULL) return gl2psAddInBspImageTree(prim, &(*tree)->front); |
---|
| 2057 | else return 0; |
---|
| 2058 | case GL2PS_SPANNING: |
---|
| 2059 | gl2psSplitPrimitive2D(prim, (*tree)->plane, &frontprim, &backprim); |
---|
| 2060 | ret = gl2psAddInBspImageTree(backprim, &(*tree)->back); |
---|
| 2061 | if((*tree)->front != NULL){ |
---|
| 2062 | if(gl2psAddInBspImageTree(frontprim, &(*tree)->front)){ |
---|
| 2063 | ret = 1; |
---|
| 2064 | } |
---|
| 2065 | } |
---|
| 2066 | gl2psFree(frontprim->verts); |
---|
| 2067 | gl2psFree(frontprim); |
---|
| 2068 | gl2psFree(backprim->verts); |
---|
| 2069 | gl2psFree(backprim); |
---|
| 2070 | return ret; |
---|
| 2071 | case GL2PS_COINCIDENT: |
---|
| 2072 | if((*tree)->back != NULL){ |
---|
| 2073 | gl2ps->zerosurfacearea = GL_TRUE; |
---|
| 2074 | ret = gl2psAddInBspImageTree(prim, &(*tree)->back); |
---|
| 2075 | gl2ps->zerosurfacearea = GL_FALSE; |
---|
| 2076 | if(ret) return ret; |
---|
| 2077 | } |
---|
| 2078 | if((*tree)->front != NULL){ |
---|
| 2079 | gl2ps->zerosurfacearea = GL_TRUE; |
---|
| 2080 | ret = gl2psAddInBspImageTree(prim, &(*tree)->front); |
---|
| 2081 | gl2ps->zerosurfacearea = GL_FALSE; |
---|
| 2082 | if(ret) return ret; |
---|
| 2083 | } |
---|
| 2084 | if(prim->type == GL2PS_LINE) return 1; |
---|
| 2085 | else return 0; |
---|
| 2086 | } |
---|
| 2087 | } |
---|
| 2088 | return 0; |
---|
| 2089 | } |
---|
| 2090 | |
---|
| 2091 | static void gl2psAddInImageTree(void *data) |
---|
| 2092 | { |
---|
| 2093 | GL2PSprimitive *prim = *(GL2PSprimitive **)data; |
---|
| 2094 | gl2ps->primitivetoadd = prim; |
---|
| 2095 | if(prim->type == GL2PS_IMAGEMAP && prim->data.image->format == GL2PS_IMAGEMAP_VISIBLE){ |
---|
| 2096 | prim->culled = 1; |
---|
| 2097 | } |
---|
| 2098 | else if(!gl2psAddInBspImageTree(prim, &gl2ps->imagetree)){ |
---|
| 2099 | prim->culled = 1; |
---|
| 2100 | } |
---|
| 2101 | else if(prim->type == GL2PS_IMAGEMAP){ |
---|
| 2102 | prim->data.image->format = GL2PS_IMAGEMAP_VISIBLE; |
---|
| 2103 | } |
---|
| 2104 | } |
---|
| 2105 | |
---|
| 2106 | /* Boundary construction */ |
---|
| 2107 | |
---|
| 2108 | static void gl2psAddBoundaryInList(GL2PSprimitive *prim, GL2PSlist *list) |
---|
| 2109 | { |
---|
| 2110 | GL2PSprimitive *b; |
---|
| 2111 | GLshort i; |
---|
| 2112 | GL2PSxyz c; |
---|
| 2113 | |
---|
| 2114 | c[0] = c[1] = c[2] = 0.0F; |
---|
| 2115 | for(i = 0; i < prim->numverts; i++){ |
---|
| 2116 | c[0] += prim->verts[i].xyz[0]; |
---|
| 2117 | c[1] += prim->verts[i].xyz[1]; |
---|
| 2118 | } |
---|
| 2119 | c[0] /= prim->numverts; |
---|
| 2120 | c[1] /= prim->numverts; |
---|
| 2121 | |
---|
| 2122 | for(i = 0; i < prim->numverts; i++){ |
---|
| 2123 | if(prim->boundary & (GLint)pow(2., i)){ |
---|
| 2124 | b = (GL2PSprimitive*)gl2psMalloc(sizeof(GL2PSprimitive)); |
---|
| 2125 | b->type = GL2PS_LINE; |
---|
| 2126 | b->offset = prim->offset; |
---|
| 2127 | b->pattern = prim->pattern; |
---|
| 2128 | b->factor = prim->factor; |
---|
| 2129 | b->culled = prim->culled; |
---|
| 2130 | b->width = prim->width; |
---|
| 2131 | b->boundary = 0; |
---|
| 2132 | b->numverts = 2; |
---|
| 2133 | b->verts = (GL2PSvertex*)gl2psMalloc(2 * sizeof(GL2PSvertex)); |
---|
| 2134 | |
---|
| 2135 | #if 0 /* FIXME: need to work on boundary offset... */ |
---|
| 2136 | v[0] = c[0] - prim->verts[i].xyz[0]; |
---|
| 2137 | v[1] = c[1] - prim->verts[i].xyz[1]; |
---|
| 2138 | v[2] = 0.0F; |
---|
| 2139 | norm = gl2psNorm(v); |
---|
| 2140 | v[0] /= norm; |
---|
| 2141 | v[1] /= norm; |
---|
| 2142 | b->verts[0].xyz[0] = prim->verts[i].xyz[0] +0.1*v[0]; |
---|
| 2143 | b->verts[0].xyz[1] = prim->verts[i].xyz[1] +0.1*v[1]; |
---|
| 2144 | b->verts[0].xyz[2] = prim->verts[i].xyz[2]; |
---|
| 2145 | v[0] = c[0] - prim->verts[gl2psGetIndex(i, prim->numverts)].xyz[0]; |
---|
| 2146 | v[1] = c[1] - prim->verts[gl2psGetIndex(i, prim->numverts)].xyz[1]; |
---|
| 2147 | norm = gl2psNorm(v); |
---|
| 2148 | v[0] /= norm; |
---|
| 2149 | v[1] /= norm; |
---|
| 2150 | b->verts[1].xyz[0] = prim->verts[gl2psGetIndex(i, prim->numverts)].xyz[0] +0.1*v[0]; |
---|
| 2151 | b->verts[1].xyz[1] = prim->verts[gl2psGetIndex(i, prim->numverts)].xyz[1] +0.1*v[1]; |
---|
| 2152 | b->verts[1].xyz[2] = prim->verts[gl2psGetIndex(i, prim->numverts)].xyz[2]; |
---|
| 2153 | #else |
---|
| 2154 | b->verts[0].xyz[0] = prim->verts[i].xyz[0]; |
---|
| 2155 | b->verts[0].xyz[1] = prim->verts[i].xyz[1]; |
---|
| 2156 | b->verts[0].xyz[2] = prim->verts[i].xyz[2]; |
---|
| 2157 | b->verts[1].xyz[0] = prim->verts[gl2psGetIndex(i, prim->numverts)].xyz[0]; |
---|
| 2158 | b->verts[1].xyz[1] = prim->verts[gl2psGetIndex(i, prim->numverts)].xyz[1]; |
---|
| 2159 | b->verts[1].xyz[2] = prim->verts[gl2psGetIndex(i, prim->numverts)].xyz[2]; |
---|
| 2160 | #endif |
---|
| 2161 | |
---|
| 2162 | b->verts[0].rgba[0] = 0.0F; |
---|
| 2163 | b->verts[0].rgba[1] = 0.0F; |
---|
| 2164 | b->verts[0].rgba[2] = 0.0F; |
---|
| 2165 | b->verts[0].rgba[3] = 0.0F; |
---|
| 2166 | b->verts[1].rgba[0] = 0.0F; |
---|
| 2167 | b->verts[1].rgba[1] = 0.0F; |
---|
| 2168 | b->verts[1].rgba[2] = 0.0F; |
---|
| 2169 | b->verts[1].rgba[3] = 0.0F; |
---|
| 2170 | gl2psListAdd(list, &b); |
---|
| 2171 | } |
---|
| 2172 | } |
---|
| 2173 | |
---|
| 2174 | } |
---|
| 2175 | |
---|
| 2176 | static void gl2psBuildPolygonBoundary(GL2PSbsptree *tree) |
---|
| 2177 | { |
---|
| 2178 | GLint i; |
---|
| 2179 | GL2PSprimitive *prim; |
---|
| 2180 | |
---|
| 2181 | if(!tree) return; |
---|
| 2182 | gl2psBuildPolygonBoundary(tree->back); |
---|
| 2183 | for(i = 0; i < gl2psListNbr(tree->primitives); i++){ |
---|
| 2184 | prim = *(GL2PSprimitive**)gl2psListPointer(tree->primitives, i); |
---|
| 2185 | if(prim->boundary) gl2psAddBoundaryInList(prim, tree->primitives); |
---|
| 2186 | } |
---|
| 2187 | gl2psBuildPolygonBoundary(tree->front); |
---|
| 2188 | } |
---|
| 2189 | |
---|
| 2190 | /********************************************************************* |
---|
| 2191 | * |
---|
| 2192 | * Feedback buffer parser |
---|
| 2193 | * |
---|
| 2194 | *********************************************************************/ |
---|
| 2195 | |
---|
| 2196 | static void gl2psAddPolyPrimitive(GLshort type, GLshort numverts, |
---|
| 2197 | GL2PSvertex *verts, GLint offset, |
---|
| 2198 | GLushort pattern, GLint factor, |
---|
| 2199 | GLfloat width, char boundary) |
---|
| 2200 | { |
---|
| 2201 | GL2PSprimitive *prim; |
---|
| 2202 | |
---|
| 2203 | prim = (GL2PSprimitive*)gl2psMalloc(sizeof(GL2PSprimitive)); |
---|
| 2204 | prim->type = type; |
---|
| 2205 | prim->numverts = numverts; |
---|
| 2206 | prim->verts = (GL2PSvertex*)gl2psMalloc(numverts * sizeof(GL2PSvertex)); |
---|
| 2207 | memcpy(prim->verts, verts, numverts * sizeof(GL2PSvertex)); |
---|
| 2208 | prim->boundary = boundary; |
---|
| 2209 | prim->offset = offset; |
---|
| 2210 | prim->pattern = pattern; |
---|
| 2211 | prim->factor = factor; |
---|
| 2212 | prim->width = width; |
---|
| 2213 | prim->culled = 0; |
---|
| 2214 | |
---|
| 2215 | /* FIXME: here we should have an option to split stretched |
---|
| 2216 | tris/quads to enhance SIMPLE_SORT */ |
---|
| 2217 | |
---|
| 2218 | gl2psListAdd(gl2ps->primitives, &prim); |
---|
| 2219 | } |
---|
| 2220 | |
---|
| 2221 | static GLint gl2psGetVertex(GL2PSvertex *v, GLfloat *p) |
---|
| 2222 | { |
---|
| 2223 | GLint i; |
---|
| 2224 | |
---|
| 2225 | v->xyz[0] = p[0]; |
---|
| 2226 | v->xyz[1] = p[1]; |
---|
| 2227 | v->xyz[2] = p[2]; |
---|
| 2228 | |
---|
| 2229 | if(gl2ps->colormode == GL_COLOR_INDEX && gl2ps->colorsize > 0){ |
---|
| 2230 | i = (GLint)(p[3] + 0.5); |
---|
| 2231 | v->rgba[0] = gl2ps->colormap[i][0]; |
---|
| 2232 | v->rgba[1] = gl2ps->colormap[i][1]; |
---|
| 2233 | v->rgba[2] = gl2ps->colormap[i][2]; |
---|
| 2234 | v->rgba[3] = gl2ps->colormap[i][3]; |
---|
| 2235 | return 4; |
---|
| 2236 | } |
---|
| 2237 | else{ |
---|
| 2238 | v->rgba[0] = p[3]; |
---|
| 2239 | v->rgba[1] = p[4]; |
---|
| 2240 | v->rgba[2] = p[5]; |
---|
| 2241 | v->rgba[3] = p[6]; |
---|
| 2242 | return 7; |
---|
| 2243 | } |
---|
| 2244 | } |
---|
| 2245 | |
---|
| 2246 | static void gl2psParseFeedbackBuffer(GLint used) |
---|
| 2247 | { |
---|
| 2248 | char flag; |
---|
| 2249 | GLushort pattern = 0; |
---|
| 2250 | GLboolean boundary; |
---|
| 2251 | GLint i, sizeoffloat, count, v, vtot, offset = 0, factor = 0, auxindex = 0; |
---|
| 2252 | GLfloat lwidth = 1.0F, psize = 1.0F; |
---|
| 2253 | GLfloat *current; |
---|
| 2254 | GL2PSvertex vertices[3]; |
---|
| 2255 | GL2PSprimitive *prim; |
---|
| 2256 | GL2PSimagemap *node; |
---|
| 2257 | |
---|
| 2258 | current = gl2ps->feedback; |
---|
| 2259 | boundary = gl2ps->boundary = GL_FALSE; |
---|
| 2260 | |
---|
| 2261 | while(used > 0){ |
---|
| 2262 | |
---|
| 2263 | if(GL_TRUE == boundary) gl2ps->boundary = GL_TRUE; |
---|
| 2264 | |
---|
| 2265 | switch((GLint)*current){ |
---|
| 2266 | case GL_POINT_TOKEN : |
---|
| 2267 | current ++; |
---|
| 2268 | used --; |
---|
| 2269 | i = gl2psGetVertex(&vertices[0], current); |
---|
| 2270 | current += i; |
---|
| 2271 | used -= i; |
---|
| 2272 | gl2psAddPolyPrimitive(GL2PS_POINT, 1, vertices, 0, |
---|
| 2273 | pattern, factor, psize, 0); |
---|
| 2274 | break; |
---|
| 2275 | case GL_LINE_TOKEN : |
---|
| 2276 | case GL_LINE_RESET_TOKEN : |
---|
| 2277 | current ++; |
---|
| 2278 | used --; |
---|
| 2279 | i = gl2psGetVertex(&vertices[0], current); |
---|
| 2280 | current += i; |
---|
| 2281 | used -= i; |
---|
| 2282 | i = gl2psGetVertex(&vertices[1], current); |
---|
| 2283 | current += i; |
---|
| 2284 | used -= i; |
---|
| 2285 | gl2psAddPolyPrimitive(GL2PS_LINE, 2, vertices, 0, |
---|
| 2286 | pattern, factor, lwidth, 0); |
---|
| 2287 | break; |
---|
| 2288 | case GL_POLYGON_TOKEN : |
---|
| 2289 | count = (GLint)current[1]; |
---|
| 2290 | current += 2; |
---|
| 2291 | used -= 2; |
---|
| 2292 | v = vtot = 0; |
---|
| 2293 | while(count > 0 && used > 0){ |
---|
| 2294 | i = gl2psGetVertex(&vertices[v], current); |
---|
| 2295 | gl2psAdaptVertexForBlending(&vertices[v]); |
---|
| 2296 | current += i; |
---|
| 2297 | used -= i; |
---|
| 2298 | count --; |
---|
| 2299 | vtot++; |
---|
| 2300 | if(v == 2){ |
---|
| 2301 | if(GL_TRUE == boundary){ |
---|
| 2302 | if(!count && vtot == 2) flag = 1|2|4; |
---|
| 2303 | else if(!count) flag = 2|4; |
---|
| 2304 | else if(vtot == 2) flag = 1|2; |
---|
| 2305 | else flag = 2; |
---|
| 2306 | } |
---|
| 2307 | else |
---|
| 2308 | flag = 0; |
---|
| 2309 | gl2psAddPolyPrimitive(GL2PS_TRIANGLE, 3, vertices, offset, |
---|
| 2310 | pattern, factor, 1, flag); |
---|
| 2311 | vertices[1] = vertices[2]; |
---|
| 2312 | } |
---|
| 2313 | else |
---|
| 2314 | v ++; |
---|
| 2315 | } |
---|
| 2316 | break; |
---|
| 2317 | case GL_BITMAP_TOKEN : |
---|
| 2318 | case GL_DRAW_PIXEL_TOKEN : |
---|
| 2319 | case GL_COPY_PIXEL_TOKEN : |
---|
| 2320 | current ++; |
---|
| 2321 | used --; |
---|
| 2322 | i = gl2psGetVertex(&vertices[0], current); |
---|
| 2323 | current += i; |
---|
| 2324 | used -= i; |
---|
| 2325 | break; |
---|
| 2326 | case GL_PASS_THROUGH_TOKEN : |
---|
| 2327 | switch((GLint)current[1]){ |
---|
| 2328 | case GL2PS_BEGIN_OFFSET_TOKEN : offset = 1; break; |
---|
| 2329 | case GL2PS_END_OFFSET_TOKEN : offset = 0; break; |
---|
| 2330 | case GL2PS_BEGIN_BOUNDARY_TOKEN : boundary = GL_TRUE; break; |
---|
| 2331 | case GL2PS_END_BOUNDARY_TOKEN : boundary = GL_FALSE; break; |
---|
| 2332 | case GL2PS_END_STIPPLE_TOKEN : pattern = factor = 0; break; |
---|
| 2333 | case GL2PS_BEGIN_BLEND_TOKEN : gl2ps->blending = GL_TRUE; break; |
---|
| 2334 | case GL2PS_END_BLEND_TOKEN : gl2ps->blending = GL_FALSE; break; |
---|
| 2335 | case GL2PS_BEGIN_STIPPLE_TOKEN : |
---|
| 2336 | current += 2; |
---|
| 2337 | used -= 2; |
---|
| 2338 | pattern = (GLushort)current[1]; |
---|
| 2339 | current += 2; |
---|
| 2340 | used -= 2; |
---|
| 2341 | factor = (GLint)current[1]; |
---|
| 2342 | break; |
---|
| 2343 | case GL2PS_SRC_BLEND_TOKEN : |
---|
| 2344 | current += 2; |
---|
| 2345 | used -= 2; |
---|
| 2346 | gl2ps->blendfunc[0] = (GLint)current[1]; |
---|
| 2347 | break; |
---|
| 2348 | case GL2PS_DST_BLEND_TOKEN : |
---|
| 2349 | current += 2; |
---|
| 2350 | used -= 2; |
---|
| 2351 | gl2ps->blendfunc[1] = (GLint)current[1]; |
---|
| 2352 | break; |
---|
| 2353 | case GL2PS_POINT_SIZE_TOKEN : |
---|
| 2354 | current += 2; |
---|
| 2355 | used -= 2; |
---|
| 2356 | psize = current[1]; |
---|
| 2357 | break; |
---|
| 2358 | case GL2PS_LINE_WIDTH_TOKEN : |
---|
| 2359 | current += 2; |
---|
| 2360 | used -= 2; |
---|
| 2361 | lwidth = current[1]; |
---|
| 2362 | break; |
---|
| 2363 | case GL2PS_IMAGEMAP_TOKEN : |
---|
| 2364 | prim = (GL2PSprimitive *)gl2psMalloc(sizeof(GL2PSprimitive)); |
---|
| 2365 | prim->type = GL2PS_IMAGEMAP; |
---|
| 2366 | prim->boundary = 0; |
---|
| 2367 | prim->numverts = 4; |
---|
| 2368 | prim->verts = (GL2PSvertex *)gl2psMalloc(4 * sizeof(GL2PSvertex)); |
---|
| 2369 | prim->culled = 0; |
---|
| 2370 | prim->offset = 0; |
---|
| 2371 | prim->pattern = 0; |
---|
| 2372 | prim->factor = 0; |
---|
| 2373 | prim->width = 1; |
---|
| 2374 | |
---|
| 2375 | node = (GL2PSimagemap*)gl2psMalloc(sizeof(GL2PSimagemap)); |
---|
| 2376 | node->image = (GL2PSimage*)gl2psMalloc(sizeof(GL2PSimage)); |
---|
| 2377 | node->image->type = 0; |
---|
| 2378 | node->image->format = 0; |
---|
| 2379 | node->next = NULL; |
---|
| 2380 | |
---|
| 2381 | if(gl2ps->imagemap_head == NULL) |
---|
| 2382 | gl2ps->imagemap_head = node; |
---|
| 2383 | else |
---|
| 2384 | gl2ps->imagemap_tail->next = node; |
---|
| 2385 | gl2ps->imagemap_tail = node; |
---|
| 2386 | prim->data.image = node->image; |
---|
| 2387 | |
---|
| 2388 | current += 2; used -= 2; |
---|
| 2389 | i = gl2psGetVertex(&prim->verts[0], ¤t[1]); |
---|
| 2390 | current += i; used -= i; |
---|
| 2391 | |
---|
| 2392 | node->image->width = (GLint)current[2]; |
---|
| 2393 | current += 2; used -= 2; |
---|
| 2394 | node->image->height = (GLint)current[2]; |
---|
| 2395 | prim->verts[0].xyz[0] = prim->verts[0].xyz[0] - (int)(node->image->width / 2) + 0.5; |
---|
| 2396 | prim->verts[0].xyz[1] = prim->verts[0].xyz[1] - (int)(node->image->height / 2) + 0.5; |
---|
| 2397 | for(i = 1; i < 4; i++){ |
---|
| 2398 | for(v = 0; v < 3; v++){ |
---|
| 2399 | prim->verts[i].xyz[v] = prim->verts[0].xyz[v]; |
---|
| 2400 | prim->verts[i].rgba[v] = prim->verts[0].rgba[v]; |
---|
| 2401 | } |
---|
| 2402 | prim->verts[i].rgba[v] = prim->verts[0].rgba[v]; |
---|
| 2403 | } |
---|
| 2404 | prim->verts[1].xyz[0] = prim->verts[1].xyz[0] + node->image->width; |
---|
| 2405 | prim->verts[2].xyz[0] = prim->verts[1].xyz[0]; |
---|
| 2406 | prim->verts[2].xyz[1] = prim->verts[2].xyz[1] + node->image->height; |
---|
| 2407 | prim->verts[3].xyz[1] = prim->verts[2].xyz[1]; |
---|
| 2408 | |
---|
| 2409 | sizeoffloat = sizeof(GLfloat); |
---|
| 2410 | v = 2 * sizeoffloat; |
---|
| 2411 | vtot = node->image->height + node->image->height * |
---|
| 2412 | ((node->image->width - 1) / 8); |
---|
| 2413 | node->image->pixels = (GLfloat*)gl2psMalloc(v + vtot); |
---|
| 2414 | node->image->pixels[0] = prim->verts[0].xyz[0]; |
---|
| 2415 | node->image->pixels[1] = prim->verts[0].xyz[1]; |
---|
| 2416 | |
---|
| 2417 | for(i = 0; i < vtot; i += sizeoffloat){ |
---|
| 2418 | current += 2; used -= 2; |
---|
| 2419 | if((vtot - i) >= 4) |
---|
| 2420 | memcpy(&(((char*)(node->image->pixels))[i + v]), &(current[2]), sizeoffloat); |
---|
| 2421 | else |
---|
| 2422 | memcpy(&(((char*)(node->image->pixels))[i + v]), &(current[2]), vtot - i); |
---|
| 2423 | } |
---|
| 2424 | current++; used--; |
---|
| 2425 | gl2psListAdd(gl2ps->primitives, &prim); |
---|
| 2426 | break; |
---|
| 2427 | case GL2PS_DRAW_PIXELS_TOKEN : |
---|
| 2428 | case GL2PS_TEXT_TOKEN : |
---|
| 2429 | if(auxindex < gl2psListNbr(gl2ps->auxprimitives)) |
---|
| 2430 | gl2psListAdd(gl2ps->primitives, |
---|
| 2431 | gl2psListPointer(gl2ps->auxprimitives, auxindex++)); |
---|
| 2432 | else |
---|
| 2433 | gl2psMsg(GL2PS_ERROR, "Wrong number of auxiliary tokens in buffer"); |
---|
| 2434 | break; |
---|
| 2435 | } |
---|
| 2436 | current += 2; |
---|
| 2437 | used -= 2; |
---|
| 2438 | break; |
---|
| 2439 | default : |
---|
| 2440 | gl2psMsg(GL2PS_WARNING, "Unknown token in buffer"); |
---|
| 2441 | current ++; |
---|
| 2442 | used --; |
---|
| 2443 | break; |
---|
| 2444 | } |
---|
| 2445 | } |
---|
| 2446 | |
---|
| 2447 | gl2psListReset(gl2ps->auxprimitives); |
---|
| 2448 | } |
---|
| 2449 | |
---|
| 2450 | /********************************************************************* |
---|
| 2451 | * |
---|
| 2452 | * PostScript routines |
---|
| 2453 | * |
---|
| 2454 | *********************************************************************/ |
---|
| 2455 | |
---|
| 2456 | static void gl2psWriteByte(unsigned char byte) |
---|
| 2457 | { |
---|
| 2458 | unsigned char h = byte / 16; |
---|
| 2459 | unsigned char l = byte % 16; |
---|
| 2460 | gl2psPrintf("%x%x", h, l); |
---|
| 2461 | } |
---|
| 2462 | |
---|
| 2463 | static void gl2psPrintPostScriptPixmap(GLfloat x, GLfloat y, GL2PSimage *im) |
---|
| 2464 | { |
---|
| 2465 | GLuint nbhex, nbyte, nrgb, nbits; |
---|
| 2466 | GLuint row, col, ibyte, icase; |
---|
| 2467 | GLfloat dr, dg, db, fgrey; |
---|
| 2468 | unsigned char red = 0, green = 0, blue = 0, b, grey; |
---|
| 2469 | GLuint width = (GLuint)im->width; |
---|
| 2470 | GLuint height = (GLuint)im->height; |
---|
| 2471 | |
---|
| 2472 | /* FIXME: should we define an option for these? Or just keep the |
---|
| 2473 | 8-bit per component case? */ |
---|
| 2474 | int greyscale = 0; /* set to 1 to output greyscale image */ |
---|
| 2475 | int nbit = 8; /* number of bits per color compoment (2, 4 or 8) */ |
---|
| 2476 | |
---|
| 2477 | if((width <= 0) || (height <= 0)) return; |
---|
| 2478 | |
---|
| 2479 | gl2psPrintf("gsave\n"); |
---|
| 2480 | gl2psPrintf("%.2f %.2f translate\n", x, y); |
---|
| 2481 | gl2psPrintf("%d %d scale\n", width, height); |
---|
| 2482 | |
---|
| 2483 | if(greyscale){ /* greyscale */ |
---|
| 2484 | gl2psPrintf("/picstr %d string def\n", width); |
---|
| 2485 | gl2psPrintf("%d %d %d\n", width, height, 8); |
---|
| 2486 | gl2psPrintf("[ %d 0 0 -%d 0 %d ]\n", width, height, height); |
---|
| 2487 | gl2psPrintf("{ currentfile picstr readhexstring pop }\n"); |
---|
| 2488 | gl2psPrintf("image\n"); |
---|
| 2489 | for(row = 0; row < height; row++){ |
---|
| 2490 | for(col = 0; col < width; col++){ |
---|
| 2491 | gl2psGetRGB(im, col, row, &dr, &dg, &db); |
---|
| 2492 | fgrey = (0.30 * dr + 0.59 * dg + 0.11 * db); |
---|
| 2493 | grey = (unsigned char)(255. * fgrey); |
---|
| 2494 | gl2psWriteByte(grey); |
---|
| 2495 | } |
---|
| 2496 | gl2psPrintf("\n"); |
---|
| 2497 | } |
---|
| 2498 | nbhex = width * height * 2; |
---|
| 2499 | gl2psPrintf("%%%% nbhex digit :%d\n", nbhex); |
---|
| 2500 | } |
---|
| 2501 | else if(nbit == 2){ /* color, 2 bits for r and g and b; rgbs following each other */ |
---|
| 2502 | nrgb = width * 3; |
---|
| 2503 | nbits = nrgb * nbit; |
---|
| 2504 | nbyte = nbits / 8; |
---|
| 2505 | if((nbyte * 8) != nbits) nbyte++; |
---|
| 2506 | gl2psPrintf("/rgbstr %d string def\n", nbyte); |
---|
| 2507 | gl2psPrintf("%d %d %d\n", width, height, nbit); |
---|
| 2508 | gl2psPrintf("[ %d 0 0 -%d 0 %d ]\n", width, height, height); |
---|
| 2509 | gl2psPrintf("{ currentfile rgbstr readhexstring pop }\n"); |
---|
| 2510 | gl2psPrintf("false 3\n"); |
---|
| 2511 | gl2psPrintf("colorimage\n"); |
---|
| 2512 | for(row = 0; row < height; row++){ |
---|
| 2513 | icase = 1; |
---|
| 2514 | col = 0; |
---|
| 2515 | b = 0; |
---|
| 2516 | for(ibyte = 0; ibyte < nbyte; ibyte++){ |
---|
| 2517 | if(icase == 1) { |
---|
| 2518 | if(col < width) { |
---|
| 2519 | gl2psGetRGB(im, col, row, &dr, &dg, &db); |
---|
| 2520 | } |
---|
| 2521 | else { |
---|
| 2522 | dr = dg = db = 0; |
---|
| 2523 | } |
---|
| 2524 | col++; |
---|
| 2525 | red = (unsigned char)(3. * dr); |
---|
| 2526 | green = (unsigned char)(3. * dg); |
---|
| 2527 | blue = (unsigned char)(3. * db); |
---|
| 2528 | b = red; |
---|
| 2529 | b = (b<<2) + green; |
---|
| 2530 | b = (b<<2) + blue; |
---|
| 2531 | if(col < width) { |
---|
| 2532 | gl2psGetRGB(im, col, row, &dr, &dg, &db); |
---|
| 2533 | } |
---|
| 2534 | else { |
---|
| 2535 | dr = dg = db = 0; |
---|
| 2536 | } |
---|
| 2537 | col++; |
---|
| 2538 | red = (unsigned char)(3. * dr); |
---|
| 2539 | green = (unsigned char)(3. * dg); |
---|
| 2540 | blue = (unsigned char)(3. * db); |
---|
| 2541 | b = (b<<2) + red; |
---|
| 2542 | gl2psWriteByte(b); |
---|
| 2543 | b = 0; |
---|
| 2544 | icase++; |
---|
| 2545 | } |
---|
| 2546 | else if(icase == 2) { |
---|
| 2547 | b = green; |
---|
| 2548 | b = (b<<2) + blue; |
---|
| 2549 | if(col < width) { |
---|
| 2550 | gl2psGetRGB(im, col, row, &dr, &dg, &db); |
---|
| 2551 | } |
---|
| 2552 | else { |
---|
| 2553 | dr = dg = db = 0; |
---|
| 2554 | } |
---|
| 2555 | col++; |
---|
| 2556 | red = (unsigned char)(3. * dr); |
---|
| 2557 | green = (unsigned char)(3. * dg); |
---|
| 2558 | blue = (unsigned char)(3. * db); |
---|
| 2559 | b = (b<<2) + red; |
---|
| 2560 | b = (b<<2) + green; |
---|
| 2561 | gl2psWriteByte(b); |
---|
| 2562 | b = 0; |
---|
| 2563 | icase++; |
---|
| 2564 | } |
---|
| 2565 | else if(icase == 3) { |
---|
| 2566 | b = blue; |
---|
| 2567 | if(col < width) { |
---|
| 2568 | gl2psGetRGB(im, col, row, &dr, &dg, &db); |
---|
| 2569 | } |
---|
| 2570 | else { |
---|
| 2571 | dr = dg = db = 0; |
---|
| 2572 | } |
---|
| 2573 | col++; |
---|
| 2574 | red = (unsigned char)(3. * dr); |
---|
| 2575 | green = (unsigned char)(3. * dg); |
---|
| 2576 | blue = (unsigned char)(3. * db); |
---|
| 2577 | b = (b<<2) + red; |
---|
| 2578 | b = (b<<2) + green; |
---|
| 2579 | b = (b<<2) + blue; |
---|
| 2580 | gl2psWriteByte(b); |
---|
| 2581 | b = 0; |
---|
| 2582 | icase = 1; |
---|
| 2583 | } |
---|
| 2584 | } |
---|
| 2585 | gl2psPrintf("\n"); |
---|
| 2586 | } |
---|
| 2587 | } |
---|
| 2588 | else if(nbit == 4){ /* color, 4 bits for r and g and b; rgbs following each other */ |
---|
| 2589 | nrgb = width * 3; |
---|
| 2590 | nbits = nrgb * nbit; |
---|
| 2591 | nbyte = nbits / 8; |
---|
| 2592 | if((nbyte * 8) != nbits) nbyte++; |
---|
| 2593 | gl2psPrintf("/rgbstr %d string def\n", nbyte); |
---|
| 2594 | gl2psPrintf("%d %d %d\n", width, height, nbit); |
---|
| 2595 | gl2psPrintf("[ %d 0 0 -%d 0 %d ]\n", width, height, height); |
---|
| 2596 | gl2psPrintf("{ currentfile rgbstr readhexstring pop }\n"); |
---|
| 2597 | gl2psPrintf("false 3\n"); |
---|
| 2598 | gl2psPrintf("colorimage\n"); |
---|
| 2599 | for(row = 0; row < height; row++){ |
---|
| 2600 | col = 0; |
---|
| 2601 | icase = 1; |
---|
| 2602 | for(ibyte = 0; ibyte < nbyte; ibyte++){ |
---|
| 2603 | if(icase == 1) { |
---|
| 2604 | if(col < width) { |
---|
| 2605 | gl2psGetRGB(im, col, row, &dr, &dg, &db); |
---|
| 2606 | } |
---|
| 2607 | else { |
---|
| 2608 | dr = dg = db = 0; |
---|
| 2609 | } |
---|
| 2610 | col++; |
---|
| 2611 | red = (unsigned char)(15. * dr); |
---|
| 2612 | green = (unsigned char)(15. * dg); |
---|
| 2613 | gl2psPrintf("%x%x", red, green); |
---|
| 2614 | icase++; |
---|
| 2615 | } |
---|
| 2616 | else if(icase == 2) { |
---|
| 2617 | blue = (unsigned char)(15. * db); |
---|
| 2618 | if(col < width) { |
---|
| 2619 | gl2psGetRGB(im, col, row, &dr, &dg, &db); |
---|
| 2620 | } |
---|
| 2621 | else { |
---|
| 2622 | dr = dg = db = 0; |
---|
| 2623 | } |
---|
| 2624 | col++; |
---|
| 2625 | red = (unsigned char)(15. * dr); |
---|
| 2626 | gl2psPrintf("%x%x", blue, red); |
---|
| 2627 | icase++; |
---|
| 2628 | } |
---|
| 2629 | else if(icase == 3) { |
---|
| 2630 | green = (unsigned char)(15. * dg); |
---|
| 2631 | blue = (unsigned char)(15. * db); |
---|
| 2632 | gl2psPrintf("%x%x", green, blue); |
---|
| 2633 | icase = 1; |
---|
| 2634 | } |
---|
| 2635 | } |
---|
| 2636 | gl2psPrintf("\n"); |
---|
| 2637 | } |
---|
| 2638 | } |
---|
| 2639 | else{ /* 8 bit for r and g and b */ |
---|
| 2640 | nbyte = width * 3; |
---|
| 2641 | gl2psPrintf("/rgbstr %d string def\n", nbyte); |
---|
| 2642 | gl2psPrintf("%d %d %d\n", width, height, 8); |
---|
| 2643 | gl2psPrintf("[ %d 0 0 -%d 0 %d ]\n", width, height, height); |
---|
| 2644 | gl2psPrintf("{ currentfile rgbstr readhexstring pop }\n"); |
---|
| 2645 | gl2psPrintf("false 3\n"); |
---|
| 2646 | gl2psPrintf("colorimage\n"); |
---|
| 2647 | for(row = 0; row < height; row++){ |
---|
| 2648 | for(col = 0; col < width; col++){ |
---|
| 2649 | gl2psGetRGB(im, col, row, &dr, &dg, &db); |
---|
| 2650 | red = (unsigned char)(255. * dr); |
---|
| 2651 | gl2psWriteByte(red); |
---|
| 2652 | green = (unsigned char)(255. * dg); |
---|
| 2653 | gl2psWriteByte(green); |
---|
| 2654 | blue = (unsigned char)(255. * db); |
---|
| 2655 | gl2psWriteByte(blue); |
---|
| 2656 | } |
---|
| 2657 | gl2psPrintf("\n"); |
---|
| 2658 | } |
---|
| 2659 | } |
---|
| 2660 | |
---|
| 2661 | gl2psPrintf("grestore\n"); |
---|
| 2662 | } |
---|
| 2663 | |
---|
| 2664 | static void gl2psPrintPostScriptImagemap(GLfloat x, GLfloat y, |
---|
| 2665 | GLsizei width, GLsizei height, |
---|
| 2666 | const unsigned char *imagemap){ |
---|
| 2667 | int i, size; |
---|
| 2668 | |
---|
| 2669 | if((width <= 0) || (height <= 0)) return; |
---|
| 2670 | |
---|
| 2671 | size = height + height * (width - 1) / 8; |
---|
| 2672 | |
---|
| 2673 | gl2psPrintf("gsave\n"); |
---|
| 2674 | gl2psPrintf("%.2f %.2f translate\n", x, y); |
---|
| 2675 | gl2psPrintf("%d %d scale\n%d %d\ntrue\n", width, height,width, height); |
---|
| 2676 | gl2psPrintf("[ %d 0 0 -%d 0 %d ] {<", width, height); |
---|
| 2677 | for(i = 0; i < size; i++){ |
---|
| 2678 | gl2psWriteByte(*imagemap); |
---|
| 2679 | imagemap++; |
---|
| 2680 | } |
---|
| 2681 | gl2psPrintf(">} imagemask\ngrestore\n"); |
---|
| 2682 | } |
---|
| 2683 | |
---|
| 2684 | static void gl2psPrintPostScriptHeader(void) |
---|
| 2685 | { |
---|
| 2686 | time_t now; |
---|
| 2687 | |
---|
| 2688 | /* Since compression is not part of the PostScript standard, |
---|
| 2689 | compressed PostScript files are just gzipped PostScript files |
---|
| 2690 | ("ps.gz" or "eps.gz") */ |
---|
| 2691 | gl2psPrintGzipHeader(); |
---|
| 2692 | |
---|
| 2693 | time(&now); |
---|
| 2694 | |
---|
| 2695 | if(gl2ps->format == GL2PS_PS){ |
---|
| 2696 | gl2psPrintf("%%!PS-Adobe-3.0\n"); |
---|
| 2697 | } |
---|
| 2698 | else{ |
---|
| 2699 | gl2psPrintf("%%!PS-Adobe-3.0 EPSF-3.0\n"); |
---|
| 2700 | } |
---|
| 2701 | |
---|
| 2702 | gl2psPrintf("%%%%Title: %s\n" |
---|
| 2703 | "%%%%Creator: GL2PS %d.%d.%d%s, %s\n" |
---|
| 2704 | "%%%%For: %s\n" |
---|
| 2705 | "%%%%CreationDate: %s" |
---|
| 2706 | "%%%%LanguageLevel: 3\n" |
---|
| 2707 | "%%%%DocumentData: Clean7Bit\n" |
---|
| 2708 | "%%%%Pages: 1\n", |
---|
| 2709 | gl2ps->title, GL2PS_MAJOR_VERSION, GL2PS_MINOR_VERSION, |
---|
| 2710 | GL2PS_PATCH_VERSION, GL2PS_EXTRA_VERSION, GL2PS_COPYRIGHT, |
---|
| 2711 | gl2ps->producer, ctime(&now)); |
---|
| 2712 | |
---|
| 2713 | if(gl2ps->format == GL2PS_PS){ |
---|
| 2714 | gl2psPrintf("%%%%Orientation: %s\n" |
---|
| 2715 | "%%%%DocumentMedia: Default %d %d 0 () ()\n", |
---|
| 2716 | (gl2ps->options & GL2PS_LANDSCAPE) ? "Landscape" : "Portrait", |
---|
| 2717 | (gl2ps->options & GL2PS_LANDSCAPE) ? (int)gl2ps->viewport[3] : |
---|
| 2718 | (int)gl2ps->viewport[2], |
---|
| 2719 | (gl2ps->options & GL2PS_LANDSCAPE) ? (int)gl2ps->viewport[2] : |
---|
| 2720 | (int)gl2ps->viewport[3]); |
---|
| 2721 | } |
---|
| 2722 | |
---|
| 2723 | gl2psPrintf("%%%%BoundingBox: %d %d %d %d\n" |
---|
| 2724 | "%%%%EndComments\n", |
---|
| 2725 | (gl2ps->options & GL2PS_LANDSCAPE) ? (int)gl2ps->viewport[1] : |
---|
| 2726 | (int)gl2ps->viewport[0], |
---|
| 2727 | (gl2ps->options & GL2PS_LANDSCAPE) ? (int)gl2ps->viewport[0] : |
---|
| 2728 | (int)gl2ps->viewport[1], |
---|
| 2729 | (gl2ps->options & GL2PS_LANDSCAPE) ? (int)gl2ps->viewport[3] : |
---|
| 2730 | (int)gl2ps->viewport[2], |
---|
| 2731 | (gl2ps->options & GL2PS_LANDSCAPE) ? (int)gl2ps->viewport[2] : |
---|
| 2732 | (int)gl2ps->viewport[3]); |
---|
| 2733 | |
---|
| 2734 | /* RGB color: r g b C (replace C by G in output to change from rgb to gray) |
---|
| 2735 | Grayscale: r g b G |
---|
| 2736 | Font choose: size fontname FC |
---|
| 2737 | Text string: (string) x y size fontname S?? |
---|
| 2738 | Rotated text string: (string) angle x y size fontname S??R |
---|
| 2739 | Point primitive: x y size P |
---|
| 2740 | Line width: width W |
---|
| 2741 | Line start: x y LS |
---|
| 2742 | Line joining last point: x y L |
---|
| 2743 | Line end: x y LE |
---|
| 2744 | Flat-shaded triangle: x3 y3 x2 y2 x1 y1 T |
---|
| 2745 | Smooth-shaded triangle: x3 y3 r3 g3 b3 x2 y2 r2 g2 b2 x1 y1 r1 g1 b1 ST */ |
---|
| 2746 | |
---|
| 2747 | gl2psPrintf("%%%%BeginProlog\n" |
---|
| 2748 | "/gl2psdict 64 dict def gl2psdict begin\n" |
---|
| 2749 | "0 setlinecap 0 setlinejoin\n" |
---|
| 2750 | "/tryPS3shading %s def %% set to false to force subdivision\n" |
---|
| 2751 | "/rThreshold %g def %% red component subdivision threshold\n" |
---|
| 2752 | "/gThreshold %g def %% green component subdivision threshold\n" |
---|
| 2753 | "/bThreshold %g def %% blue component subdivision threshold\n", |
---|
| 2754 | (gl2ps->options & GL2PS_NO_PS3_SHADING) ? "false" : "true", |
---|
| 2755 | gl2ps->threshold[0], gl2ps->threshold[1], gl2ps->threshold[2]); |
---|
| 2756 | |
---|
| 2757 | gl2psPrintf("/BD { bind def } bind def\n" |
---|
| 2758 | "/C { setrgbcolor } BD\n" |
---|
| 2759 | "/G { 0.082 mul exch 0.6094 mul add exch 0.3086 mul add neg 1.0 add setgray } BD\n" |
---|
| 2760 | "/W { setlinewidth } BD\n"); |
---|
| 2761 | |
---|
| 2762 | gl2psPrintf("/FC { findfont exch /SH exch def SH scalefont setfont } BD\n" |
---|
| 2763 | "/SW { dup stringwidth pop } BD\n" |
---|
| 2764 | "/S { FC moveto show } BD\n" |
---|
| 2765 | "/SBC{ FC moveto SW -2 div 0 rmoveto show } BD\n" |
---|
| 2766 | "/SBR{ FC moveto SW neg 0 rmoveto show } BD\n" |
---|
| 2767 | "/SCL{ FC moveto 0 SH -2 div rmoveto show } BD\n" |
---|
| 2768 | "/SCC{ FC moveto SW -2 div SH -2 div rmoveto show } BD\n" |
---|
| 2769 | "/SCR{ FC moveto SW neg SH -2 div rmoveto show } BD\n" |
---|
| 2770 | "/STL{ FC moveto 0 SH neg rmoveto show } BD\n" |
---|
| 2771 | "/STC{ FC moveto SW -2 div SH neg rmoveto show } BD\n" |
---|
| 2772 | "/STR{ FC moveto SW neg SH neg rmoveto show } BD\n"); |
---|
| 2773 | |
---|
| 2774 | /* rotated text routines: same nameanem with R appended */ |
---|
| 2775 | |
---|
| 2776 | gl2psPrintf("/FCT { FC translate 0 0 } BD\n" |
---|
| 2777 | "/SR { gsave FCT moveto rotate show grestore } BD\n" |
---|
| 2778 | "/SBCR{ gsave FCT moveto rotate SW -2 div 0 rmoveto show grestore } BD\n" |
---|
| 2779 | "/SBRR{ gsave FCT moveto rotate SW neg 0 rmoveto show grestore } BD\n" |
---|
| 2780 | "/SCLR{ gsave FCT moveto rotate 0 SH -2 div rmoveto show grestore} BD\n"); |
---|
| 2781 | gl2psPrintf("/SCCR{ gsave FCT moveto rotate SW -2 div SH -2 div rmoveto show grestore} BD\n" |
---|
| 2782 | "/SCRR{ gsave FCT moveto rotate SW neg SH -2 div rmoveto show grestore} BD\n" |
---|
| 2783 | "/STLR{ gsave FCT moveto rotate 0 SH neg rmoveto show grestore } BD\n" |
---|
| 2784 | "/STCR{ gsave FCT moveto rotate SW -2 div SH neg rmoveto show grestore } BD\n" |
---|
| 2785 | "/STRR{ gsave FCT moveto rotate SW neg SH neg rmoveto show grestore } BD\n"); |
---|
| 2786 | |
---|
| 2787 | gl2psPrintf("/P { newpath 0.0 360.0 arc closepath fill } BD\n" |
---|
| 2788 | "/LS { newpath moveto } BD\n" |
---|
| 2789 | "/L { lineto } BD\n" |
---|
| 2790 | "/LE { lineto stroke } BD\n" |
---|
| 2791 | "/T { newpath moveto lineto lineto closepath fill } BD\n"); |
---|
| 2792 | |
---|
| 2793 | /* Smooth-shaded triangle with PostScript level 3 shfill operator: |
---|
| 2794 | x3 y3 r3 g3 b3 x2 y2 r2 g2 b2 x1 y1 r1 g1 b1 STshfill */ |
---|
| 2795 | |
---|
| 2796 | gl2psPrintf("/STshfill {\n" |
---|
| 2797 | " /b1 exch def /g1 exch def /r1 exch def /y1 exch def /x1 exch def\n" |
---|
| 2798 | " /b2 exch def /g2 exch def /r2 exch def /y2 exch def /x2 exch def\n" |
---|
| 2799 | " /b3 exch def /g3 exch def /r3 exch def /y3 exch def /x3 exch def\n" |
---|
| 2800 | " gsave << /ShadingType 4 /ColorSpace [/DeviceRGB]\n" |
---|
| 2801 | " /DataSource [ 0 x1 y1 r1 g1 b1 0 x2 y2 r2 g2 b2 0 x3 y3 r3 g3 b3 ] >>\n" |
---|
| 2802 | " shfill grestore } BD\n"); |
---|
| 2803 | |
---|
| 2804 | /* Flat-shaded triangle with middle color: |
---|
| 2805 | x3 y3 r3 g3 b3 x2 y2 r2 g2 b2 x1 y1 r1 g1 b1 Tm */ |
---|
| 2806 | |
---|
| 2807 | gl2psPrintf(/* stack : x3 y3 r3 g3 b3 x2 y2 r2 g2 b2 x1 y1 r1 g1 b1 */ |
---|
| 2808 | "/Tm { 3 -1 roll 8 -1 roll 13 -1 roll add add 3 div\n" /* r = (r1+r2+r3)/3 */ |
---|
| 2809 | /* stack : x3 y3 g3 b3 x2 y2 g2 b2 x1 y1 g1 b1 r */ |
---|
| 2810 | " 3 -1 roll 7 -1 roll 11 -1 roll add add 3 div\n" /* g = (g1+g2+g3)/3 */ |
---|
| 2811 | /* stack : x3 y3 b3 x2 y2 b2 x1 y1 b1 r g b */ |
---|
| 2812 | " 3 -1 roll 6 -1 roll 9 -1 roll add add 3 div" /* b = (b1+b2+b3)/3 */ |
---|
| 2813 | /* stack : x3 y3 x2 y2 x1 y1 r g b */ |
---|
| 2814 | " C T } BD\n"); |
---|
| 2815 | |
---|
| 2816 | /* Split triangle in four sub-triangles (at sides middle points) and call the |
---|
| 2817 | STnoshfill procedure on each, interpolating the colors in RGB space: |
---|
| 2818 | x3 y3 r3 g3 b3 x2 y2 r2 g2 b2 x1 y1 r1 g1 b1 STsplit |
---|
| 2819 | (in procedure comments key: (Vi) = xi yi ri gi bi) */ |
---|
| 2820 | |
---|
| 2821 | gl2psPrintf("/STsplit {\n" |
---|
| 2822 | " 4 index 15 index add 0.5 mul\n" /* x13 = (x1+x3)/2 */ |
---|
| 2823 | " 4 index 15 index add 0.5 mul\n" /* y13 = (y1+y3)/2 */ |
---|
| 2824 | " 4 index 15 index add 0.5 mul\n" /* r13 = (r1+r3)/2 */ |
---|
| 2825 | " 4 index 15 index add 0.5 mul\n" /* g13 = (g1+g3)/2 */ |
---|
| 2826 | " 4 index 15 index add 0.5 mul\n" /* b13 = (b1+b3)/2 */ |
---|
| 2827 | " 5 copy 5 copy 25 15 roll\n"); |
---|
| 2828 | |
---|
| 2829 | /* at his point, stack = (V3) (V13) (V13) (V13) (V2) (V1) */ |
---|
| 2830 | |
---|
| 2831 | gl2psPrintf(" 9 index 30 index add 0.5 mul\n" /* x23 = (x2+x3)/2 */ |
---|
| 2832 | " 9 index 30 index add 0.5 mul\n" /* y23 = (y2+y3)/2 */ |
---|
| 2833 | " 9 index 30 index add 0.5 mul\n" /* r23 = (r2+r3)/2 */ |
---|
| 2834 | " 9 index 30 index add 0.5 mul\n" /* g23 = (g2+g3)/2 */ |
---|
| 2835 | " 9 index 30 index add 0.5 mul\n" /* b23 = (b2+b3)/2 */ |
---|
| 2836 | " 5 copy 5 copy 35 5 roll 25 5 roll 15 5 roll\n"); |
---|
| 2837 | |
---|
| 2838 | /* stack = (V3) (V13) (V23) (V13) (V23) (V13) (V23) (V2) (V1) */ |
---|
| 2839 | |
---|
| 2840 | gl2psPrintf(" 4 index 10 index add 0.5 mul\n" /* x12 = (x1+x2)/2 */ |
---|
| 2841 | " 4 index 10 index add 0.5 mul\n" /* y12 = (y1+y2)/2 */ |
---|
| 2842 | " 4 index 10 index add 0.5 mul\n" /* r12 = (r1+r2)/2 */ |
---|
| 2843 | " 4 index 10 index add 0.5 mul\n" /* g12 = (g1+g2)/2 */ |
---|
| 2844 | " 4 index 10 index add 0.5 mul\n" /* b12 = (b1+b2)/2 */ |
---|
| 2845 | " 5 copy 5 copy 40 5 roll 25 5 roll 15 5 roll 25 5 roll\n"); |
---|
| 2846 | |
---|
| 2847 | /* stack = (V3) (V13) (V23) (V13) (V12) (V23) (V13) (V1) (V12) (V23) (V12) (V2) */ |
---|
| 2848 | |
---|
| 2849 | gl2psPrintf(" STnoshfill STnoshfill STnoshfill STnoshfill } BD\n"); |
---|
| 2850 | |
---|
| 2851 | /* Gouraud shaded triangle using recursive subdivision until the difference |
---|
| 2852 | between corner colors does not exceed the thresholds: |
---|
| 2853 | x3 y3 r3 g3 b3 x2 y2 r2 g2 b2 x1 y1 r1 g1 b1 STnoshfill */ |
---|
| 2854 | |
---|
| 2855 | gl2psPrintf("/STnoshfill {\n" |
---|
| 2856 | " 2 index 8 index sub abs rThreshold gt\n" /* |r1-r2|>rth */ |
---|
| 2857 | " { STsplit }\n" |
---|
| 2858 | " { 1 index 7 index sub abs gThreshold gt\n" /* |g1-g2|>gth */ |
---|
| 2859 | " { STsplit }\n" |
---|
| 2860 | " { dup 6 index sub abs bThreshold gt\n" /* |b1-b2|>bth */ |
---|
| 2861 | " { STsplit }\n" |
---|
| 2862 | " { 2 index 13 index sub abs rThreshold gt\n" /* |r1-r3|>rht */ |
---|
| 2863 | " { STsplit }\n" |
---|
| 2864 | " { 1 index 12 index sub abs gThreshold gt\n" /* |g1-g3|>gth */ |
---|
| 2865 | " { STsplit }\n" |
---|
| 2866 | " { dup 11 index sub abs bThreshold gt\n" /* |b1-b3|>bth */ |
---|
| 2867 | " { STsplit }\n" |
---|
| 2868 | " { 7 index 13 index sub abs rThreshold gt\n"); /* |r2-r3|>rht */ |
---|
| 2869 | gl2psPrintf(" { STsplit }\n" |
---|
| 2870 | " { 6 index 12 index sub abs gThreshold gt\n" /* |g2-g3|>gth */ |
---|
| 2871 | " { STsplit }\n" |
---|
| 2872 | " { 5 index 11 index sub abs bThreshold gt\n" /* |b2-b3|>bth */ |
---|
| 2873 | " { STsplit }\n" |
---|
| 2874 | " { Tm }\n" /* all colors sufficiently similar */ |
---|
| 2875 | " ifelse }\n" |
---|
| 2876 | " ifelse }\n" |
---|
| 2877 | " ifelse }\n" |
---|
| 2878 | " ifelse }\n" |
---|
| 2879 | " ifelse }\n" |
---|
| 2880 | " ifelse }\n" |
---|
| 2881 | " ifelse }\n" |
---|
| 2882 | " ifelse }\n" |
---|
| 2883 | " ifelse } BD\n"); |
---|
| 2884 | |
---|
| 2885 | gl2psPrintf("tryPS3shading\n" |
---|
| 2886 | "{ /shfill where\n" |
---|
| 2887 | " { /ST { STshfill } BD }\n" |
---|
| 2888 | " { /ST { STnoshfill } BD }\n" |
---|
| 2889 | " ifelse }\n" |
---|
| 2890 | "{ /ST { STnoshfill } BD }\n" |
---|
| 2891 | "ifelse\n"); |
---|
| 2892 | |
---|
| 2893 | gl2psPrintf("end\n" |
---|
| 2894 | "%%%%EndProlog\n" |
---|
| 2895 | "%%%%BeginSetup\n" |
---|
| 2896 | "/DeviceRGB setcolorspace\n" |
---|
| 2897 | "gl2psdict begin\n" |
---|
| 2898 | "%%%%EndSetup\n" |
---|
| 2899 | "%%%%Page: 1 1\n" |
---|
| 2900 | "%%%%BeginPageSetup\n"); |
---|
| 2901 | |
---|
| 2902 | if(gl2ps->options & GL2PS_LANDSCAPE){ |
---|
| 2903 | gl2psPrintf("%d 0 translate 90 rotate\n", |
---|
| 2904 | (int)gl2ps->viewport[3]); |
---|
| 2905 | } |
---|
| 2906 | |
---|
| 2907 | gl2psPrintf("%%%%EndPageSetup\n" |
---|
| 2908 | "mark\n" |
---|
| 2909 | "gsave\n" |
---|
| 2910 | "1.0 1.0 scale\n"); |
---|
| 2911 | |
---|
| 2912 | if(gl2ps->options & GL2PS_DRAW_BACKGROUND){ |
---|
| 2913 | gl2psPrintf("%g %g %g C\n" |
---|
| 2914 | "newpath %d %d moveto %d %d lineto %d %d lineto %d %d lineto\n" |
---|
| 2915 | "closepath fill\n", |
---|
| 2916 | gl2ps->bgcolor[0], gl2ps->bgcolor[1], gl2ps->bgcolor[2], |
---|
| 2917 | (int)gl2ps->viewport[0], (int)gl2ps->viewport[1], (int)gl2ps->viewport[2], |
---|
| 2918 | (int)gl2ps->viewport[1], (int)gl2ps->viewport[2], (int)gl2ps->viewport[3], |
---|
| 2919 | (int)gl2ps->viewport[0], (int)gl2ps->viewport[3]); |
---|
| 2920 | } |
---|
| 2921 | } |
---|
| 2922 | |
---|
| 2923 | static void gl2psPrintPostScriptColor(GL2PSrgba rgba) |
---|
| 2924 | { |
---|
| 2925 | if(!gl2psSameColor(gl2ps->lastrgba, rgba)){ |
---|
| 2926 | gl2psSetLastColor(rgba); |
---|
| 2927 | gl2psPrintf("%g %g %g C\n", rgba[0], rgba[1], rgba[2]); |
---|
| 2928 | } |
---|
| 2929 | } |
---|
| 2930 | |
---|
| 2931 | static void gl2psResetPostScriptColor(void) |
---|
| 2932 | { |
---|
| 2933 | gl2ps->lastrgba[0] = gl2ps->lastrgba[1] = gl2ps->lastrgba[2] = -1.; |
---|
| 2934 | } |
---|
| 2935 | |
---|
| 2936 | static void gl2psEndPostScriptLine(void) |
---|
| 2937 | { |
---|
| 2938 | int i; |
---|
| 2939 | if(gl2ps->lastvertex.rgba[0] >= 0.){ |
---|
| 2940 | gl2psPrintf("%g %g LE\n", gl2ps->lastvertex.xyz[0], gl2ps->lastvertex.xyz[1]); |
---|
| 2941 | for(i = 0; i < 3; i++) |
---|
| 2942 | gl2ps->lastvertex.xyz[i] = -1.; |
---|
| 2943 | for(i = 0; i < 4; i++) |
---|
| 2944 | gl2ps->lastvertex.rgba[i] = -1.; |
---|
| 2945 | } |
---|
| 2946 | } |
---|
| 2947 | |
---|
| 2948 | static void gl2psParseStipplePattern(GLushort pattern, GLint factor, |
---|
| 2949 | int *nb, int array[10]) |
---|
| 2950 | { |
---|
| 2951 | int i, n; |
---|
| 2952 | int on[8] = {0, 0, 0, 0, 0, 0, 0, 0}; |
---|
| 2953 | int off[8] = {0, 0, 0, 0, 0, 0, 0, 0}; |
---|
| 2954 | char tmp[16]; |
---|
| 2955 | |
---|
| 2956 | /* extract the 16 bits from the OpenGL stipple pattern */ |
---|
| 2957 | for(n = 15; n >= 0; n--){ |
---|
| 2958 | tmp[n] = (char)(pattern & 0x01); |
---|
| 2959 | pattern >>= 1; |
---|
| 2960 | } |
---|
| 2961 | /* compute the on/off pixel sequence */ |
---|
| 2962 | n = 0; |
---|
| 2963 | for(i = 0; i < 8; i++){ |
---|
| 2964 | while(n < 16 && !tmp[n]){ off[i]++; n++; } |
---|
| 2965 | while(n < 16 && tmp[n]){ on[i]++; n++; } |
---|
| 2966 | if(n >= 15){ i++; break; } |
---|
| 2967 | } |
---|
| 2968 | |
---|
| 2969 | /* store the on/off array from right to left, starting with off |
---|
| 2970 | pixels. The PostScript specification allows for at most 11 |
---|
| 2971 | elements in the on/off array, so we limit ourselves to 5 on/off |
---|
| 2972 | couples (our longest possible array is thus [on4 off4 on3 off3 |
---|
| 2973 | on2 off2 on1 off1 on0 off0]) */ |
---|
| 2974 | *nb = 0; |
---|
| 2975 | for(n = i - 1; n >= 0; n--){ |
---|
| 2976 | array[(*nb)++] = factor * on[n]; |
---|
| 2977 | array[(*nb)++] = factor * off[n]; |
---|
| 2978 | if(*nb == 10) break; |
---|
| 2979 | } |
---|
| 2980 | } |
---|
| 2981 | |
---|
| 2982 | static int gl2psPrintPostScriptDash(GLushort pattern, GLint factor, const char *str) |
---|
| 2983 | { |
---|
| 2984 | int len = 0, i, n, array[10]; |
---|
| 2985 | |
---|
| 2986 | if(pattern == gl2ps->lastpattern && factor == gl2ps->lastfactor) |
---|
| 2987 | return 0; |
---|
| 2988 | |
---|
| 2989 | gl2ps->lastpattern = pattern; |
---|
| 2990 | gl2ps->lastfactor = factor; |
---|
| 2991 | |
---|
| 2992 | if(!pattern || !factor){ |
---|
| 2993 | /* solid line */ |
---|
| 2994 | len += gl2psPrintf("[] 0 %s\n", str); |
---|
| 2995 | } |
---|
| 2996 | else{ |
---|
| 2997 | gl2psParseStipplePattern(pattern, factor, &n, array); |
---|
| 2998 | len += gl2psPrintf("["); |
---|
| 2999 | for(i = 0; i < n; i++){ |
---|
| 3000 | if(i) len += gl2psPrintf(" "); |
---|
| 3001 | len += gl2psPrintf("%d", array[i]); |
---|
| 3002 | } |
---|
| 3003 | len += gl2psPrintf("] 0 %s\n", str); |
---|
| 3004 | } |
---|
| 3005 | |
---|
| 3006 | return len; |
---|
| 3007 | } |
---|
| 3008 | |
---|
| 3009 | static void gl2psPrintPostScriptPrimitive(void *data) |
---|
| 3010 | { |
---|
| 3011 | int newline; |
---|
| 3012 | GL2PSprimitive *prim; |
---|
| 3013 | |
---|
| 3014 | prim = *(GL2PSprimitive**)data; |
---|
| 3015 | |
---|
| 3016 | if((gl2ps->options & GL2PS_OCCLUSION_CULL) && prim->culled) return; |
---|
| 3017 | |
---|
| 3018 | /* Every effort is made to draw lines as connected segments (i.e., |
---|
| 3019 | using a single PostScript path): this is the only way to get nice |
---|
| 3020 | line joins and to not restart the stippling for every line |
---|
| 3021 | segment. So if the primitive to print is not a line we must first |
---|
| 3022 | finish the current line (if any): */ |
---|
| 3023 | if(prim->type != GL2PS_LINE) gl2psEndPostScriptLine(); |
---|
| 3024 | |
---|
| 3025 | switch(prim->type){ |
---|
| 3026 | case GL2PS_POINT : |
---|
| 3027 | gl2psPrintPostScriptColor(prim->verts[0].rgba); |
---|
| 3028 | gl2psPrintf("%g %g %g P\n", |
---|
| 3029 | prim->verts[0].xyz[0], prim->verts[0].xyz[1], 0.5 * prim->width); |
---|
| 3030 | break; |
---|
| 3031 | case GL2PS_LINE : |
---|
| 3032 | if(!gl2psSamePosition(gl2ps->lastvertex.xyz, prim->verts[0].xyz) || |
---|
| 3033 | !gl2psSameColor(gl2ps->lastrgba, prim->verts[0].rgba) || |
---|
| 3034 | gl2ps->lastlinewidth != prim->width || |
---|
| 3035 | gl2ps->lastpattern != prim->pattern || |
---|
| 3036 | gl2ps->lastfactor != prim->factor){ |
---|
| 3037 | /* End the current line if the new segment does not start where |
---|
| 3038 | the last one ended, or if the color, the width or the |
---|
| 3039 | stippling have changed (multi-stroking lines with changing |
---|
| 3040 | colors is necessary until we use /shfill for lines; |
---|
| 3041 | unfortunately this means that at the moment we can screw up |
---|
| 3042 | line stippling for smooth-shaded lines) */ |
---|
| 3043 | gl2psEndPostScriptLine(); |
---|
| 3044 | newline = 1; |
---|
| 3045 | } |
---|
| 3046 | else{ |
---|
| 3047 | newline = 0; |
---|
| 3048 | } |
---|
| 3049 | if(gl2ps->lastlinewidth != prim->width){ |
---|
| 3050 | gl2ps->lastlinewidth = prim->width; |
---|
| 3051 | gl2psPrintf("%g W\n", gl2ps->lastlinewidth); |
---|
| 3052 | } |
---|
| 3053 | gl2psPrintPostScriptDash(prim->pattern, prim->factor, "setdash"); |
---|
| 3054 | gl2psPrintPostScriptColor(prim->verts[0].rgba); |
---|
| 3055 | gl2psPrintf("%g %g %s\n", prim->verts[0].xyz[0], prim->verts[0].xyz[1], |
---|
| 3056 | newline ? "LS" : "L"); |
---|
| 3057 | gl2ps->lastvertex = prim->verts[1]; |
---|
| 3058 | break; |
---|
| 3059 | case GL2PS_TRIANGLE : |
---|
| 3060 | if(!gl2psVertsSameColor(prim)){ |
---|
| 3061 | gl2psResetPostScriptColor(); |
---|
| 3062 | gl2psPrintf("%g %g %g %g %g %g %g %g %g %g %g %g %g %g %g ST\n", |
---|
| 3063 | prim->verts[2].xyz[0], prim->verts[2].xyz[1], |
---|
| 3064 | prim->verts[2].rgba[0], prim->verts[2].rgba[1], |
---|
| 3065 | prim->verts[2].rgba[2], prim->verts[1].xyz[0], |
---|
| 3066 | prim->verts[1].xyz[1], prim->verts[1].rgba[0], |
---|
| 3067 | prim->verts[1].rgba[1], prim->verts[1].rgba[2], |
---|
| 3068 | prim->verts[0].xyz[0], prim->verts[0].xyz[1], |
---|
| 3069 | prim->verts[0].rgba[0], prim->verts[0].rgba[1], |
---|
| 3070 | prim->verts[0].rgba[2]); |
---|
| 3071 | } |
---|
| 3072 | else{ |
---|
| 3073 | gl2psPrintPostScriptColor(prim->verts[0].rgba); |
---|
| 3074 | gl2psPrintf("%g %g %g %g %g %g T\n", |
---|
| 3075 | prim->verts[2].xyz[0], prim->verts[2].xyz[1], |
---|
| 3076 | prim->verts[1].xyz[0], prim->verts[1].xyz[1], |
---|
| 3077 | prim->verts[0].xyz[0], prim->verts[0].xyz[1]); |
---|
| 3078 | } |
---|
| 3079 | break; |
---|
| 3080 | case GL2PS_QUADRANGLE : |
---|
| 3081 | gl2psMsg(GL2PS_WARNING, "There should not be any quad left to print"); |
---|
| 3082 | break; |
---|
| 3083 | case GL2PS_PIXMAP : |
---|
| 3084 | gl2psPrintPostScriptPixmap(prim->verts[0].xyz[0], prim->verts[0].xyz[1], |
---|
| 3085 | prim->data.image); |
---|
| 3086 | break; |
---|
| 3087 | case GL2PS_IMAGEMAP : |
---|
| 3088 | if(prim->data.image->type != GL2PS_IMAGEMAP_WRITTEN){ |
---|
| 3089 | gl2psPrintPostScriptColor(prim->verts[0].rgba); |
---|
| 3090 | gl2psPrintPostScriptImagemap(prim->data.image->pixels[0], |
---|
| 3091 | prim->data.image->pixels[1], |
---|
| 3092 | prim->data.image->width, prim->data.image->height, |
---|
| 3093 | (const unsigned char*)(&(prim->data.image->pixels[2]))); |
---|
| 3094 | prim->data.image->type = GL2PS_IMAGEMAP_WRITTEN; |
---|
| 3095 | } |
---|
| 3096 | break; |
---|
| 3097 | case GL2PS_TEXT : |
---|
| 3098 | gl2psPrintPostScriptColor(prim->verts[0].rgba); |
---|
| 3099 | gl2psPrintf("(%s) ", prim->data.text->str); |
---|
| 3100 | if(prim->data.text->angle) |
---|
| 3101 | gl2psPrintf("%g ", prim->data.text->angle); |
---|
| 3102 | gl2psPrintf("%g %g %d /%s ", |
---|
| 3103 | prim->verts[0].xyz[0], prim->verts[0].xyz[1], |
---|
| 3104 | prim->data.text->fontsize, prim->data.text->fontname); |
---|
| 3105 | switch(prim->data.text->alignment){ |
---|
| 3106 | case GL2PS_TEXT_C: |
---|
| 3107 | gl2psPrintf(prim->data.text->angle ? "SCCR\n" : "SCC\n"); |
---|
| 3108 | break; |
---|
| 3109 | case GL2PS_TEXT_CL: |
---|
| 3110 | gl2psPrintf(prim->data.text->angle ? "SCLR\n" : "SCL\n"); |
---|
| 3111 | break; |
---|
| 3112 | case GL2PS_TEXT_CR: |
---|
| 3113 | gl2psPrintf(prim->data.text->angle ? "SCRR\n" : "SCR\n"); |
---|
| 3114 | break; |
---|
| 3115 | case GL2PS_TEXT_B: |
---|
| 3116 | gl2psPrintf(prim->data.text->angle ? "SBCR\n" : "SBC\n"); |
---|
| 3117 | break; |
---|
| 3118 | case GL2PS_TEXT_BR: |
---|
| 3119 | gl2psPrintf(prim->data.text->angle ? "SBRR\n" : "SBR\n"); |
---|
| 3120 | break; |
---|
| 3121 | case GL2PS_TEXT_T: |
---|
| 3122 | gl2psPrintf(prim->data.text->angle ? "STCR\n" : "STC\n"); |
---|
| 3123 | break; |
---|
| 3124 | case GL2PS_TEXT_TL: |
---|
| 3125 | gl2psPrintf(prim->data.text->angle ? "STLR\n" : "STL\n"); |
---|
| 3126 | break; |
---|
| 3127 | case GL2PS_TEXT_TR: |
---|
| 3128 | gl2psPrintf(prim->data.text->angle ? "STRR\n" : "STR\n"); |
---|
| 3129 | break; |
---|
| 3130 | case GL2PS_TEXT_BL: |
---|
| 3131 | default: |
---|
| 3132 | gl2psPrintf(prim->data.text->angle ? "SR\n" : "S\n"); |
---|
| 3133 | break; |
---|
| 3134 | } |
---|
| 3135 | break; |
---|
| 3136 | case GL2PS_SPECIAL : |
---|
| 3137 | /* alignment contains the format for which the special output text |
---|
| 3138 | is intended */ |
---|
| 3139 | if(prim->data.text->alignment == GL2PS_PS || |
---|
| 3140 | prim->data.text->alignment == GL2PS_EPS) |
---|
| 3141 | gl2psPrintf("%s\n", prim->data.text->str); |
---|
| 3142 | break; |
---|
| 3143 | default : |
---|
| 3144 | break; |
---|
| 3145 | } |
---|
| 3146 | } |
---|
| 3147 | |
---|
| 3148 | static void gl2psPrintPostScriptFooter(void) |
---|
| 3149 | { |
---|
| 3150 | gl2psPrintf("grestore\n" |
---|
| 3151 | "showpage\n" |
---|
| 3152 | "cleartomark\n" |
---|
| 3153 | "%%%%PageTrailer\n" |
---|
| 3154 | "%%%%Trailer\n" |
---|
| 3155 | "end\n" |
---|
| 3156 | "%%%%EOF\n"); |
---|
| 3157 | |
---|
| 3158 | gl2psPrintGzipFooter(); |
---|
| 3159 | } |
---|
| 3160 | |
---|
| 3161 | static void gl2psPrintPostScriptBeginViewport(GLint viewport[4]) |
---|
| 3162 | { |
---|
| 3163 | GLint index; |
---|
| 3164 | GLfloat rgba[4]; |
---|
| 3165 | int x = viewport[0], y = viewport[1], w = viewport[2], h = viewport[3]; |
---|
| 3166 | |
---|
| 3167 | glRenderMode(GL_FEEDBACK); |
---|
| 3168 | |
---|
| 3169 | if(gl2ps->header){ |
---|
| 3170 | gl2psPrintPostScriptHeader(); |
---|
| 3171 | gl2ps->header = GL_FALSE; |
---|
| 3172 | } |
---|
| 3173 | |
---|
| 3174 | gl2psPrintf("gsave\n" |
---|
| 3175 | "1.0 1.0 scale\n"); |
---|
| 3176 | |
---|
| 3177 | if(gl2ps->options & GL2PS_DRAW_BACKGROUND){ |
---|
| 3178 | if(gl2ps->colormode == GL_RGBA || gl2ps->colorsize == 0){ |
---|
| 3179 | glGetFloatv(GL_COLOR_CLEAR_VALUE, rgba); |
---|
| 3180 | } |
---|
| 3181 | else{ |
---|
| 3182 | glGetIntegerv(GL_INDEX_CLEAR_VALUE, &index); |
---|
| 3183 | rgba[0] = gl2ps->colormap[index][0]; |
---|
| 3184 | rgba[1] = gl2ps->colormap[index][1]; |
---|
| 3185 | rgba[2] = gl2ps->colormap[index][2]; |
---|
| 3186 | rgba[3] = 1.0F; |
---|
| 3187 | } |
---|
| 3188 | gl2psPrintf("%g %g %g C\n" |
---|
| 3189 | "newpath %d %d moveto %d %d lineto %d %d lineto %d %d lineto\n" |
---|
| 3190 | "closepath fill\n", |
---|
| 3191 | rgba[0], rgba[1], rgba[2], |
---|
| 3192 | x, y, x+w, y, x+w, y+h, x, y+h); |
---|
| 3193 | } |
---|
| 3194 | |
---|
| 3195 | gl2psPrintf("newpath %d %d moveto %d %d lineto %d %d lineto %d %d lineto\n" |
---|
| 3196 | "closepath clip\n", |
---|
| 3197 | x, y, x+w, y, x+w, y+h, x, y+h); |
---|
| 3198 | |
---|
| 3199 | } |
---|
| 3200 | |
---|
| 3201 | static GLint gl2psPrintPostScriptEndViewport(void) |
---|
| 3202 | { |
---|
| 3203 | GLint res; |
---|
| 3204 | |
---|
| 3205 | res = gl2psPrintPrimitives(); |
---|
| 3206 | gl2psPrintf("grestore\n"); |
---|
| 3207 | return res; |
---|
| 3208 | } |
---|
| 3209 | |
---|
| 3210 | static void gl2psPrintPostScriptFinalPrimitive(void) |
---|
| 3211 | { |
---|
| 3212 | /* End any remaining line, if any */ |
---|
| 3213 | gl2psEndPostScriptLine(); |
---|
| 3214 | } |
---|
| 3215 | |
---|
| 3216 | /* definition of the PostScript and Encapsulated PostScript backends */ |
---|
| 3217 | |
---|
| 3218 | static GL2PSbackend gl2psPS = { |
---|
| 3219 | gl2psPrintPostScriptHeader, |
---|
| 3220 | gl2psPrintPostScriptFooter, |
---|
| 3221 | gl2psPrintPostScriptBeginViewport, |
---|
| 3222 | gl2psPrintPostScriptEndViewport, |
---|
| 3223 | gl2psPrintPostScriptPrimitive, |
---|
| 3224 | gl2psPrintPostScriptFinalPrimitive, |
---|
| 3225 | "ps", |
---|
| 3226 | "Postscript" |
---|
| 3227 | }; |
---|
| 3228 | |
---|
| 3229 | static GL2PSbackend gl2psEPS = { |
---|
| 3230 | gl2psPrintPostScriptHeader, |
---|
| 3231 | gl2psPrintPostScriptFooter, |
---|
| 3232 | gl2psPrintPostScriptBeginViewport, |
---|
| 3233 | gl2psPrintPostScriptEndViewport, |
---|
| 3234 | gl2psPrintPostScriptPrimitive, |
---|
| 3235 | gl2psPrintPostScriptFinalPrimitive, |
---|
| 3236 | "eps", |
---|
| 3237 | "Encapsulated Postscript" |
---|
| 3238 | }; |
---|
| 3239 | |
---|
| 3240 | /********************************************************************* |
---|
| 3241 | * |
---|
| 3242 | * LaTeX routines |
---|
| 3243 | * |
---|
| 3244 | *********************************************************************/ |
---|
| 3245 | |
---|
| 3246 | static void gl2psPrintTeXHeader(void) |
---|
| 3247 | { |
---|
| 3248 | char name[256]; |
---|
| 3249 | time_t now; |
---|
| 3250 | int i; |
---|
| 3251 | |
---|
| 3252 | if(gl2ps->filename && strlen(gl2ps->filename) < 256){ |
---|
| 3253 | for(i = strlen(gl2ps->filename)-1; i >= 0; i--){ |
---|
| 3254 | if(gl2ps->filename[i] == '.'){ |
---|
| 3255 | strncpy(name, gl2ps->filename, i); |
---|
| 3256 | name[i] = '\0'; |
---|
| 3257 | break; |
---|
| 3258 | } |
---|
| 3259 | } |
---|
| 3260 | if(i <= 0) strcpy(name, gl2ps->filename); |
---|
| 3261 | } |
---|
| 3262 | else{ |
---|
| 3263 | strcpy(name, "untitled"); |
---|
| 3264 | } |
---|
| 3265 | |
---|
| 3266 | time(&now); |
---|
| 3267 | |
---|
| 3268 | fprintf(gl2ps->stream, |
---|
| 3269 | "%% Title: %s\n" |
---|
| 3270 | "%% Creator: GL2PS %d.%d.%d%s, %s\n" |
---|
| 3271 | "%% For: %s\n" |
---|
| 3272 | "%% CreationDate: %s", |
---|
| 3273 | gl2ps->title, GL2PS_MAJOR_VERSION, GL2PS_MINOR_VERSION, |
---|
| 3274 | GL2PS_PATCH_VERSION, GL2PS_EXTRA_VERSION, GL2PS_COPYRIGHT, |
---|
| 3275 | gl2ps->producer, ctime(&now)); |
---|
| 3276 | |
---|
| 3277 | fprintf(gl2ps->stream, |
---|
| 3278 | "\\setlength{\\unitlength}{1pt}\n" |
---|
| 3279 | "\\begin{picture}(0,0)\n" |
---|
| 3280 | "\\includegraphics{%s}\n" |
---|
| 3281 | "\\end{picture}%%\n" |
---|
| 3282 | "%s\\begin{picture}(%d,%d)(0,0)\n", |
---|
| 3283 | name, (gl2ps->options & GL2PS_LANDSCAPE) ? "\\rotatebox{90}{" : "", |
---|
| 3284 | (int)gl2ps->viewport[2], (int)gl2ps->viewport[3]); |
---|
| 3285 | } |
---|
| 3286 | |
---|
| 3287 | static void gl2psPrintTeXPrimitive(void *data) |
---|
| 3288 | { |
---|
| 3289 | GL2PSprimitive *prim; |
---|
| 3290 | |
---|
| 3291 | prim = *(GL2PSprimitive**)data; |
---|
| 3292 | |
---|
| 3293 | switch(prim->type){ |
---|
| 3294 | case GL2PS_TEXT : |
---|
| 3295 | fprintf(gl2ps->stream, "\\fontsize{%d}{0}\n\\selectfont", |
---|
| 3296 | prim->data.text->fontsize); |
---|
| 3297 | fprintf(gl2ps->stream, "\\put(%g,%g){\\makebox(0,0)", |
---|
| 3298 | prim->verts[0].xyz[0], prim->verts[0].xyz[1]); |
---|
| 3299 | switch(prim->data.text->alignment){ |
---|
| 3300 | case GL2PS_TEXT_C: |
---|
| 3301 | fprintf(gl2ps->stream, "{"); |
---|
| 3302 | break; |
---|
| 3303 | case GL2PS_TEXT_CL: |
---|
| 3304 | fprintf(gl2ps->stream, "[l]{"); |
---|
| 3305 | break; |
---|
| 3306 | case GL2PS_TEXT_CR: |
---|
| 3307 | fprintf(gl2ps->stream, "[r]{"); |
---|
| 3308 | break; |
---|
| 3309 | case GL2PS_TEXT_B: |
---|
| 3310 | fprintf(gl2ps->stream, "[b]{"); |
---|
| 3311 | break; |
---|
| 3312 | case GL2PS_TEXT_BR: |
---|
| 3313 | fprintf(gl2ps->stream, "[br]{"); |
---|
| 3314 | break; |
---|
| 3315 | case GL2PS_TEXT_T: |
---|
| 3316 | fprintf(gl2ps->stream, "[t]{"); |
---|
| 3317 | break; |
---|
| 3318 | case GL2PS_TEXT_TL: |
---|
| 3319 | fprintf(gl2ps->stream, "[tl]{"); |
---|
| 3320 | break; |
---|
| 3321 | case GL2PS_TEXT_TR: |
---|
| 3322 | fprintf(gl2ps->stream, "[tr]{"); |
---|
| 3323 | break; |
---|
| 3324 | case GL2PS_TEXT_BL: |
---|
| 3325 | default: |
---|
| 3326 | fprintf(gl2ps->stream, "[bl]{"); |
---|
| 3327 | break; |
---|
| 3328 | } |
---|
| 3329 | if(prim->data.text->angle) |
---|
| 3330 | fprintf(gl2ps->stream, "\\rotatebox{%g}{", prim->data.text->angle); |
---|
| 3331 | fprintf(gl2ps->stream, "\\textcolor[rgb]{%g,%g,%g}{{%s}}", |
---|
| 3332 | prim->verts[0].rgba[0], prim->verts[0].rgba[1], prim->verts[0].rgba[2], |
---|
| 3333 | prim->data.text->str); |
---|
| 3334 | if(prim->data.text->angle) |
---|
| 3335 | fprintf(gl2ps->stream, "}"); |
---|
| 3336 | fprintf(gl2ps->stream, "}}\n"); |
---|
| 3337 | break; |
---|
| 3338 | case GL2PS_SPECIAL : |
---|
| 3339 | /* alignment contains the format for which the special output text |
---|
| 3340 | is intended */ |
---|
| 3341 | if (prim->data.text->alignment == GL2PS_TEX) |
---|
| 3342 | fprintf(gl2ps->stream, "%s\n", prim->data.text->str); |
---|
| 3343 | break; |
---|
| 3344 | default : |
---|
| 3345 | break; |
---|
| 3346 | } |
---|
| 3347 | } |
---|
| 3348 | |
---|
| 3349 | static void gl2psPrintTeXFooter(void) |
---|
| 3350 | { |
---|
| 3351 | fprintf(gl2ps->stream, "\\end{picture}%s\n", |
---|
| 3352 | (gl2ps->options & GL2PS_LANDSCAPE) ? "}" : ""); |
---|
| 3353 | } |
---|
| 3354 | |
---|
| 3355 | static void gl2psPrintTeXBeginViewport(GLint [4]) |
---|
| 3356 | { |
---|
| 3357 | glRenderMode(GL_FEEDBACK); |
---|
| 3358 | |
---|
| 3359 | if(gl2ps->header){ |
---|
| 3360 | gl2psPrintTeXHeader(); |
---|
| 3361 | gl2ps->header = GL_FALSE; |
---|
| 3362 | } |
---|
| 3363 | } |
---|
| 3364 | |
---|
| 3365 | static GLint gl2psPrintTeXEndViewport(void) |
---|
| 3366 | { |
---|
| 3367 | return gl2psPrintPrimitives(); |
---|
| 3368 | } |
---|
| 3369 | |
---|
| 3370 | static void gl2psPrintTeXFinalPrimitive(void) |
---|
| 3371 | { |
---|
| 3372 | } |
---|
| 3373 | |
---|
| 3374 | /* definition of the LaTeX backend */ |
---|
| 3375 | |
---|
| 3376 | static GL2PSbackend gl2psTEX = { |
---|
| 3377 | gl2psPrintTeXHeader, |
---|
| 3378 | gl2psPrintTeXFooter, |
---|
| 3379 | gl2psPrintTeXBeginViewport, |
---|
| 3380 | gl2psPrintTeXEndViewport, |
---|
| 3381 | gl2psPrintTeXPrimitive, |
---|
| 3382 | gl2psPrintTeXFinalPrimitive, |
---|
| 3383 | "tex", |
---|
| 3384 | "LaTeX text" |
---|
| 3385 | }; |
---|
| 3386 | |
---|
| 3387 | /********************************************************************* |
---|
| 3388 | * |
---|
| 3389 | * PDF routines |
---|
| 3390 | * |
---|
| 3391 | *********************************************************************/ |
---|
| 3392 | |
---|
| 3393 | static int gl2psPrintPDFCompressorType(void) |
---|
| 3394 | { |
---|
| 3395 | #if defined(GL2PS_HAVE_ZLIB) |
---|
| 3396 | if(gl2ps->options & GL2PS_COMPRESS){ |
---|
| 3397 | return fprintf(gl2ps->stream, "/Filter [/FlateDecode]\n"); |
---|
| 3398 | } |
---|
| 3399 | #endif |
---|
| 3400 | return 0; |
---|
| 3401 | } |
---|
| 3402 | |
---|
| 3403 | static int gl2psPrintPDFStrokeColor(GL2PSrgba rgba) |
---|
| 3404 | { |
---|
| 3405 | int i, offs = 0; |
---|
| 3406 | |
---|
| 3407 | gl2psSetLastColor(rgba); |
---|
| 3408 | for(i = 0; i < 3; ++i){ |
---|
| 3409 | if(GL2PS_ZERO(rgba[i])) |
---|
| 3410 | offs += gl2psPrintf("%.0f ", 0.); |
---|
| 3411 | else if(rgba[i] < 1e-4 || rgba[i] > 1e6) /* avoid %e formatting */ |
---|
| 3412 | offs += gl2psPrintf("%f ", rgba[i]); |
---|
| 3413 | else |
---|
| 3414 | offs += gl2psPrintf("%g ", rgba[i]); |
---|
| 3415 | } |
---|
| 3416 | offs += gl2psPrintf("RG\n"); |
---|
| 3417 | return offs; |
---|
| 3418 | } |
---|
| 3419 | |
---|
| 3420 | static int gl2psPrintPDFFillColor(GL2PSrgba rgba) |
---|
| 3421 | { |
---|
| 3422 | int i, offs = 0; |
---|
| 3423 | |
---|
| 3424 | for(i = 0; i < 3; ++i){ |
---|
| 3425 | if(GL2PS_ZERO(rgba[i])) |
---|
| 3426 | offs += gl2psPrintf("%.0f ", 0.); |
---|
| 3427 | else if(rgba[i] < 1e-4 || rgba[i] > 1e6) /* avoid %e formatting */ |
---|
| 3428 | offs += gl2psPrintf("%f ", rgba[i]); |
---|
| 3429 | else |
---|
| 3430 | offs += gl2psPrintf("%g ", rgba[i]); |
---|
| 3431 | } |
---|
| 3432 | offs += gl2psPrintf("rg\n"); |
---|
| 3433 | return offs; |
---|
| 3434 | } |
---|
| 3435 | |
---|
| 3436 | static int gl2psPrintPDFLineWidth(GLfloat lw) |
---|
| 3437 | { |
---|
| 3438 | if(GL2PS_ZERO(lw)) |
---|
| 3439 | return gl2psPrintf("%.0f w\n", 0.); |
---|
| 3440 | else if(lw < 1e-4 || lw > 1e6) /* avoid %e formatting */ |
---|
| 3441 | return gl2psPrintf("%f w\n", lw); |
---|
| 3442 | else |
---|
| 3443 | return gl2psPrintf("%g w\n", lw); |
---|
| 3444 | } |
---|
| 3445 | |
---|
| 3446 | static void gl2psPutPDFText(GL2PSstring *text, int cnt, GLfloat x, GLfloat y) |
---|
| 3447 | { |
---|
| 3448 | gl2ps->streamlength += |
---|
| 3449 | gl2psPrintf("BT\n" |
---|
| 3450 | "/F%d %d Tf\n" |
---|
| 3451 | "%f %f Td\n" |
---|
| 3452 | "(%s) Tj\n" |
---|
| 3453 | "ET\n", |
---|
| 3454 | cnt, text->fontsize, x, y, text->str); |
---|
| 3455 | } |
---|
| 3456 | |
---|
| 3457 | static void gl2psPutPDFImage(GL2PSimage *image, int cnt, GLfloat x, GLfloat y) |
---|
| 3458 | { |
---|
| 3459 | gl2ps->streamlength += |
---|
| 3460 | gl2psPrintf("q\n" |
---|
| 3461 | "%d 0 0 %d %f %f cm\n" |
---|
| 3462 | "/Im%d Do\n" |
---|
| 3463 | "Q\n", |
---|
| 3464 | (int)image->width, (int)image->height, x, y, cnt); |
---|
| 3465 | } |
---|
| 3466 | |
---|
| 3467 | static void gl2psPDFstacksInit(void) |
---|
| 3468 | { |
---|
| 3469 | gl2ps->objects_stack = 7 /* FIXED_XREF_ENTRIES */ + 1; |
---|
| 3470 | gl2ps->extgs_stack = 0; |
---|
| 3471 | gl2ps->font_stack = 0; |
---|
| 3472 | gl2ps->im_stack = 0; |
---|
| 3473 | gl2ps->trgroupobjects_stack = 0; |
---|
| 3474 | gl2ps->shader_stack = 0; |
---|
| 3475 | gl2ps->mshader_stack = 0; |
---|
| 3476 | } |
---|
| 3477 | |
---|
| 3478 | static void gl2psPDFgroupObjectInit(GL2PSpdfgroup *gro) |
---|
| 3479 | { |
---|
| 3480 | if(!gro) |
---|
| 3481 | return; |
---|
| 3482 | |
---|
| 3483 | gro->ptrlist = NULL; |
---|
| 3484 | gro->fontno = gro->gsno = gro->imno = gro->maskshno = gro->shno |
---|
| 3485 | = gro->trgroupno = gro->fontobjno = gro->imobjno = gro->shobjno |
---|
| 3486 | = gro->maskshobjno = gro->gsobjno = gro->trgroupobjno = -1; |
---|
| 3487 | } |
---|
| 3488 | |
---|
| 3489 | /* Build up group objects and assign name and object numbers */ |
---|
| 3490 | |
---|
| 3491 | static void gl2psPDFgroupListInit(void) |
---|
| 3492 | { |
---|
| 3493 | int i; |
---|
| 3494 | GL2PSprimitive *p = NULL; |
---|
| 3495 | GL2PSpdfgroup gro; |
---|
| 3496 | int lasttype = GL2PS_NO_TYPE; |
---|
| 3497 | GL2PSrgba lastrgba = {-1.0F, -1.0F, -1.0F, -1.0F}; |
---|
| 3498 | GLushort lastpattern = 0; |
---|
| 3499 | GLint lastfactor = 0; |
---|
| 3500 | GLfloat lastwidth = 1; |
---|
| 3501 | GL2PStriangle lastt, tmpt; |
---|
| 3502 | int lastTriangleWasNotSimpleWithSameColor = 0; |
---|
| 3503 | |
---|
| 3504 | if(!gl2ps->pdfprimlist) |
---|
| 3505 | return; |
---|
| 3506 | |
---|
| 3507 | gl2ps->pdfgrouplist = gl2psListCreate(500, 500, sizeof(GL2PSpdfgroup)); |
---|
| 3508 | gl2psInitTriangle(&lastt); |
---|
| 3509 | |
---|
| 3510 | for(i = 0; i < gl2psListNbr(gl2ps->pdfprimlist); ++i){ |
---|
| 3511 | p = *(GL2PSprimitive**)gl2psListPointer(gl2ps->pdfprimlist, i); |
---|
| 3512 | switch(p->type){ |
---|
| 3513 | case GL2PS_PIXMAP: |
---|
| 3514 | gl2psPDFgroupObjectInit(&gro); |
---|
| 3515 | gro.ptrlist = gl2psListCreate(1, 2, sizeof(GL2PSprimitive*)); |
---|
| 3516 | gro.imno = gl2ps->im_stack++; |
---|
| 3517 | gl2psListAdd(gro.ptrlist, &p); |
---|
| 3518 | gl2psListAdd(gl2ps->pdfgrouplist, &gro); |
---|
| 3519 | break; |
---|
| 3520 | case GL2PS_TEXT: |
---|
| 3521 | gl2psPDFgroupObjectInit(&gro); |
---|
| 3522 | gro.ptrlist = gl2psListCreate(1, 2, sizeof(GL2PSprimitive*)); |
---|
| 3523 | gro.fontno = gl2ps->font_stack++; |
---|
| 3524 | gl2psListAdd(gro.ptrlist, &p); |
---|
| 3525 | gl2psListAdd(gl2ps->pdfgrouplist, &gro); |
---|
| 3526 | break; |
---|
| 3527 | case GL2PS_LINE: |
---|
| 3528 | if(lasttype != p->type || lastwidth != p->width || |
---|
| 3529 | lastpattern != p->pattern || lastfactor != p->factor || |
---|
| 3530 | !gl2psSameColor(p->verts[0].rgba, lastrgba)){ |
---|
| 3531 | gl2psPDFgroupObjectInit(&gro); |
---|
| 3532 | gro.ptrlist = gl2psListCreate(1, 2, sizeof(GL2PSprimitive*)); |
---|
| 3533 | gl2psListAdd(gro.ptrlist, &p); |
---|
| 3534 | gl2psListAdd(gl2ps->pdfgrouplist, &gro); |
---|
| 3535 | } |
---|
| 3536 | else{ |
---|
| 3537 | gl2psListAdd(gro.ptrlist, &p); |
---|
| 3538 | } |
---|
| 3539 | lastpattern = p->pattern; |
---|
| 3540 | lastfactor = p->factor; |
---|
| 3541 | lastwidth = p->width; |
---|
| 3542 | lastrgba[0] = p->verts[0].rgba[0]; |
---|
| 3543 | lastrgba[1] = p->verts[0].rgba[1]; |
---|
| 3544 | lastrgba[2] = p->verts[0].rgba[2]; |
---|
| 3545 | break; |
---|
| 3546 | case GL2PS_POINT: |
---|
| 3547 | if(lasttype != p->type || lastwidth != p->width || |
---|
| 3548 | !gl2psSameColor(p->verts[0].rgba, lastrgba)){ |
---|
| 3549 | gl2psPDFgroupObjectInit(&gro); |
---|
| 3550 | gro.ptrlist = gl2psListCreate(1,2,sizeof(GL2PSprimitive*)); |
---|
| 3551 | gl2psListAdd(gro.ptrlist, &p); |
---|
| 3552 | gl2psListAdd(gl2ps->pdfgrouplist, &gro); |
---|
| 3553 | } |
---|
| 3554 | else{ |
---|
| 3555 | gl2psListAdd(gro.ptrlist, &p); |
---|
| 3556 | } |
---|
| 3557 | lastwidth = p->width; |
---|
| 3558 | lastrgba[0] = p->verts[0].rgba[0]; |
---|
| 3559 | lastrgba[1] = p->verts[0].rgba[1]; |
---|
| 3560 | lastrgba[2] = p->verts[0].rgba[2]; |
---|
| 3561 | break; |
---|
| 3562 | case GL2PS_TRIANGLE: |
---|
| 3563 | gl2psFillTriangleFromPrimitive(&tmpt, p, GL_TRUE); |
---|
| 3564 | lastTriangleWasNotSimpleWithSameColor = |
---|
| 3565 | !(tmpt.prop & T_CONST_COLOR && tmpt.prop & T_ALPHA_1) || |
---|
| 3566 | !gl2psSameColor(tmpt.vertex[0].rgba, lastt.vertex[0].rgba); |
---|
| 3567 | if(lasttype == p->type && tmpt.prop == lastt.prop && |
---|
| 3568 | lastTriangleWasNotSimpleWithSameColor){ |
---|
| 3569 | /* TODO Check here for last alpha */ |
---|
| 3570 | gl2psListAdd(gro.ptrlist, &p); |
---|
| 3571 | } |
---|
| 3572 | else{ |
---|
| 3573 | gl2psPDFgroupObjectInit(&gro); |
---|
| 3574 | gro.ptrlist = gl2psListCreate(1, 2, sizeof(GL2PSprimitive*)); |
---|
| 3575 | gl2psListAdd(gro.ptrlist, &p); |
---|
| 3576 | gl2psListAdd(gl2ps->pdfgrouplist, &gro); |
---|
| 3577 | } |
---|
| 3578 | lastt = tmpt; |
---|
| 3579 | break; |
---|
| 3580 | default: |
---|
| 3581 | break; |
---|
| 3582 | } |
---|
| 3583 | lasttype = p->type; |
---|
| 3584 | } |
---|
| 3585 | } |
---|
| 3586 | |
---|
| 3587 | static void gl2psSortOutTrianglePDFgroup(GL2PSpdfgroup *gro) |
---|
| 3588 | { |
---|
| 3589 | GL2PStriangle t; |
---|
| 3590 | GL2PSprimitive *prim = NULL; |
---|
| 3591 | |
---|
| 3592 | if(!gro) |
---|
| 3593 | return; |
---|
| 3594 | |
---|
| 3595 | if(!gl2psListNbr(gro->ptrlist)) |
---|
| 3596 | return; |
---|
| 3597 | |
---|
| 3598 | prim = *(GL2PSprimitive**)gl2psListPointer(gro->ptrlist, 0); |
---|
| 3599 | |
---|
| 3600 | if(prim->type != GL2PS_TRIANGLE) |
---|
| 3601 | return; |
---|
| 3602 | |
---|
| 3603 | gl2psFillTriangleFromPrimitive(&t, prim, GL_TRUE); |
---|
| 3604 | |
---|
| 3605 | if(t.prop & T_CONST_COLOR && t.prop & T_ALPHA_LESS_1){ |
---|
| 3606 | gro->gsno = gl2ps->extgs_stack++; |
---|
| 3607 | gro->gsobjno = gl2ps->objects_stack ++; |
---|
| 3608 | } |
---|
| 3609 | else if(t.prop & T_CONST_COLOR && t.prop & T_VAR_ALPHA){ |
---|
| 3610 | gro->gsno = gl2ps->extgs_stack++; |
---|
| 3611 | gro->gsobjno = gl2ps->objects_stack++; |
---|
| 3612 | gro->trgroupno = gl2ps->trgroupobjects_stack++; |
---|
| 3613 | gro->trgroupobjno = gl2ps->objects_stack++; |
---|
| 3614 | gro->maskshno = gl2ps->mshader_stack++; |
---|
| 3615 | gro->maskshobjno = gl2ps->objects_stack++; |
---|
| 3616 | } |
---|
| 3617 | else if(t.prop & T_VAR_COLOR && t.prop & T_ALPHA_1){ |
---|
| 3618 | gro->shno = gl2ps->shader_stack++; |
---|
| 3619 | gro->shobjno = gl2ps->objects_stack++; |
---|
| 3620 | } |
---|
| 3621 | else if(t.prop & T_VAR_COLOR && t.prop & T_ALPHA_LESS_1){ |
---|
| 3622 | gro->gsno = gl2ps->extgs_stack++; |
---|
| 3623 | gro->gsobjno = gl2ps->objects_stack++; |
---|
| 3624 | gro->shno = gl2ps->shader_stack++; |
---|
| 3625 | gro->shobjno = gl2ps->objects_stack++; |
---|
| 3626 | } |
---|
| 3627 | else if(t.prop & T_VAR_COLOR && t.prop & T_VAR_ALPHA){ |
---|
| 3628 | gro->gsno = gl2ps->extgs_stack++; |
---|
| 3629 | gro->gsobjno = gl2ps->objects_stack++; |
---|
| 3630 | gro->shno = gl2ps->shader_stack++; |
---|
| 3631 | gro->shobjno = gl2ps->objects_stack++; |
---|
| 3632 | gro->trgroupno = gl2ps->trgroupobjects_stack++; |
---|
| 3633 | gro->trgroupobjno = gl2ps->objects_stack++; |
---|
| 3634 | gro->maskshno = gl2ps->mshader_stack++; |
---|
| 3635 | gro->maskshobjno = gl2ps->objects_stack++; |
---|
| 3636 | } |
---|
| 3637 | } |
---|
| 3638 | |
---|
| 3639 | /* Main stream data */ |
---|
| 3640 | |
---|
| 3641 | static void gl2psPDFgroupListWriteMainStream(void) |
---|
| 3642 | { |
---|
| 3643 | int i, j, lastel; |
---|
| 3644 | GL2PSprimitive *prim = NULL, *prev = NULL; |
---|
| 3645 | GL2PSpdfgroup *gro; |
---|
| 3646 | GL2PStriangle t; |
---|
| 3647 | |
---|
| 3648 | if(!gl2ps->pdfgrouplist) |
---|
| 3649 | return; |
---|
| 3650 | |
---|
| 3651 | for(i = 0; i < gl2psListNbr(gl2ps->pdfgrouplist); ++i){ |
---|
| 3652 | gro = (GL2PSpdfgroup*)gl2psListPointer(gl2ps->pdfgrouplist, i); |
---|
| 3653 | |
---|
| 3654 | lastel = gl2psListNbr(gro->ptrlist) - 1; |
---|
| 3655 | if(lastel < 0) |
---|
| 3656 | continue; |
---|
| 3657 | |
---|
| 3658 | prim = *(GL2PSprimitive**)gl2psListPointer(gro->ptrlist, 0); |
---|
| 3659 | |
---|
| 3660 | switch(prim->type){ |
---|
| 3661 | case GL2PS_POINT: |
---|
| 3662 | gl2ps->streamlength += gl2psPrintf("1 J\n"); |
---|
| 3663 | gl2ps->streamlength += gl2psPrintPDFLineWidth(prim->width); |
---|
| 3664 | gl2ps->streamlength += gl2psPrintPDFStrokeColor(prim->verts[0].rgba); |
---|
| 3665 | for(j = 0; j <= lastel; ++j){ |
---|
| 3666 | prim = *(GL2PSprimitive**)gl2psListPointer(gro->ptrlist, j); |
---|
| 3667 | gl2ps->streamlength += |
---|
| 3668 | gl2psPrintf("%f %f m %f %f l\n", |
---|
| 3669 | prim->verts[0].xyz[0], prim->verts[0].xyz[1], |
---|
| 3670 | prim->verts[0].xyz[0], prim->verts[0].xyz[1]); |
---|
| 3671 | } |
---|
| 3672 | gl2ps->streamlength += gl2psPrintf("S\n"); |
---|
| 3673 | gl2ps->streamlength += gl2psPrintf("0 J\n"); |
---|
| 3674 | break; |
---|
| 3675 | case GL2PS_LINE: |
---|
| 3676 | /* We try to use as few paths as possible to draw lines, in |
---|
| 3677 | order to get nice stippling even when the individual segments |
---|
| 3678 | are smaller than the stipple */ |
---|
| 3679 | gl2ps->streamlength += gl2psPrintPDFLineWidth(prim->width); |
---|
| 3680 | gl2ps->streamlength += gl2psPrintPDFStrokeColor(prim->verts[0].rgba); |
---|
| 3681 | gl2ps->streamlength += gl2psPrintPostScriptDash(prim->pattern, prim->factor, "d"); |
---|
| 3682 | /* start new path */ |
---|
| 3683 | gl2ps->streamlength += |
---|
| 3684 | gl2psPrintf("%f %f m\n", |
---|
| 3685 | prim->verts[0].xyz[0], prim->verts[0].xyz[1]); |
---|
| 3686 | |
---|
| 3687 | for(j = 1; j <= lastel; ++j){ |
---|
| 3688 | prev = prim; |
---|
| 3689 | prim = *(GL2PSprimitive**)gl2psListPointer(gro->ptrlist, j); |
---|
| 3690 | if(!gl2psSamePosition(prim->verts[0].xyz, prev->verts[1].xyz)){ |
---|
| 3691 | /* the starting point of the new segment does not match the |
---|
| 3692 | end point of the previous line, so we end the current |
---|
| 3693 | path and start a new one */ |
---|
| 3694 | gl2ps->streamlength += |
---|
| 3695 | gl2psPrintf("%f %f l\n", |
---|
| 3696 | prev->verts[1].xyz[0], prev->verts[1].xyz[1]); |
---|
| 3697 | gl2ps->streamlength += |
---|
| 3698 | gl2psPrintf("%f %f m\n", |
---|
| 3699 | prim->verts[0].xyz[0], prim->verts[0].xyz[1]); |
---|
| 3700 | } |
---|
| 3701 | else{ |
---|
| 3702 | /* the two segements are connected, so we just append to the |
---|
| 3703 | current path */ |
---|
| 3704 | gl2ps->streamlength += |
---|
| 3705 | gl2psPrintf("%f %f l\n", |
---|
| 3706 | prim->verts[0].xyz[0], prim->verts[0].xyz[1]); |
---|
| 3707 | } |
---|
| 3708 | } |
---|
| 3709 | /* end last path */ |
---|
| 3710 | gl2ps->streamlength += |
---|
| 3711 | gl2psPrintf("%f %f l\n", |
---|
| 3712 | prim->verts[1].xyz[0], prim->verts[1].xyz[1]); |
---|
| 3713 | gl2ps->streamlength += gl2psPrintf("S\n"); |
---|
| 3714 | break; |
---|
| 3715 | case GL2PS_TRIANGLE: |
---|
| 3716 | gl2psFillTriangleFromPrimitive(&t, prim, GL_TRUE); |
---|
| 3717 | gl2psSortOutTrianglePDFgroup(gro); |
---|
| 3718 | |
---|
| 3719 | /* No alpha and const color: Simple PDF draw orders */ |
---|
| 3720 | if(t.prop & T_CONST_COLOR && t.prop & T_ALPHA_1){ |
---|
| 3721 | gl2ps->streamlength += gl2psPrintPDFFillColor(t.vertex[0].rgba); |
---|
| 3722 | for(j = 0; j <= lastel; ++j){ |
---|
| 3723 | prim = *(GL2PSprimitive**)gl2psListPointer(gro->ptrlist, j); |
---|
| 3724 | gl2psFillTriangleFromPrimitive(&t, prim, GL_FALSE); |
---|
| 3725 | gl2ps->streamlength |
---|
| 3726 | += gl2psPrintf("%f %f m\n" |
---|
| 3727 | "%f %f l\n" |
---|
| 3728 | "%f %f l\n" |
---|
| 3729 | "h f\n", |
---|
| 3730 | t.vertex[0].xyz[0], t.vertex[0].xyz[1], |
---|
| 3731 | t.vertex[1].xyz[0], t.vertex[1].xyz[1], |
---|
| 3732 | t.vertex[2].xyz[0], t.vertex[2].xyz[1]); |
---|
| 3733 | } |
---|
| 3734 | } |
---|
| 3735 | /* Const alpha < 1 and const color: Simple PDF draw orders |
---|
| 3736 | and an extra extended Graphics State for the alpha const */ |
---|
| 3737 | else if(t.prop & T_CONST_COLOR && t.prop & T_ALPHA_LESS_1){ |
---|
| 3738 | gl2ps->streamlength += gl2psPrintf("q\n" |
---|
| 3739 | "/GS%d gs\n", |
---|
| 3740 | gro->gsno); |
---|
| 3741 | gl2ps->streamlength += gl2psPrintPDFFillColor(prim->verts[0].rgba); |
---|
| 3742 | for(j = 0; j <= lastel; ++j){ |
---|
| 3743 | prim = *(GL2PSprimitive**)gl2psListPointer(gro->ptrlist, j); |
---|
| 3744 | gl2psFillTriangleFromPrimitive(&t, prim, GL_FALSE); |
---|
| 3745 | gl2ps->streamlength |
---|
| 3746 | += gl2psPrintf("%f %f m\n" |
---|
| 3747 | "%f %f l\n" |
---|
| 3748 | "%f %f l\n" |
---|
| 3749 | "h f\n", |
---|
| 3750 | t.vertex[0].xyz[0], t.vertex[0].xyz[1], |
---|
| 3751 | t.vertex[1].xyz[0], t.vertex[1].xyz[1], |
---|
| 3752 | t.vertex[2].xyz[0], t.vertex[2].xyz[1]); |
---|
| 3753 | } |
---|
| 3754 | gl2ps->streamlength += gl2psPrintf("Q\n"); |
---|
| 3755 | } |
---|
| 3756 | /* Variable alpha and const color: Simple PDF draw orders |
---|
| 3757 | and an extra extended Graphics State + Xobject + Shader |
---|
| 3758 | object for the alpha mask */ |
---|
| 3759 | else if(t.prop & T_CONST_COLOR && t.prop & T_VAR_ALPHA){ |
---|
| 3760 | gl2ps->streamlength += gl2psPrintf("q\n" |
---|
| 3761 | "/GS%d gs\n" |
---|
| 3762 | "/TrG%d Do\n", |
---|
| 3763 | gro->gsno, gro->trgroupno); |
---|
| 3764 | gl2ps->streamlength += gl2psPrintPDFFillColor(prim->verts[0].rgba); |
---|
| 3765 | for(j = 0; j <= lastel; ++j){ |
---|
| 3766 | prim = *(GL2PSprimitive**)gl2psListPointer(gro->ptrlist, j); |
---|
| 3767 | gl2psFillTriangleFromPrimitive(&t, prim, GL_FALSE); |
---|
| 3768 | gl2ps->streamlength |
---|
| 3769 | += gl2psPrintf("%f %f m\n" |
---|
| 3770 | "%f %f l\n" |
---|
| 3771 | "%f %f l\n" |
---|
| 3772 | "h f\n", |
---|
| 3773 | t.vertex[0].xyz[0], t.vertex[0].xyz[1], |
---|
| 3774 | t.vertex[1].xyz[0], t.vertex[1].xyz[1], |
---|
| 3775 | t.vertex[2].xyz[0], t.vertex[2].xyz[1]); |
---|
| 3776 | } |
---|
| 3777 | gl2ps->streamlength += gl2psPrintf("Q\n"); |
---|
| 3778 | } |
---|
| 3779 | /* Variable color and no alpha: Shader Object for the colored |
---|
| 3780 | triangle(s) */ |
---|
| 3781 | else if(t.prop & T_VAR_COLOR && t.prop & T_ALPHA_1){ |
---|
| 3782 | gl2ps->streamlength += gl2psPrintf("/Sh%d sh\n", gro->shno); |
---|
| 3783 | } |
---|
| 3784 | /* Variable color and const alpha < 1: Shader Object for the |
---|
| 3785 | colored triangle(s) and an extra extended Graphics State |
---|
| 3786 | for the alpha const */ |
---|
| 3787 | else if(t.prop & T_VAR_COLOR && t.prop & T_ALPHA_LESS_1){ |
---|
| 3788 | gl2ps->streamlength += gl2psPrintf("q\n" |
---|
| 3789 | "/GS%d gs\n" |
---|
| 3790 | "/Sh%d sh\n" |
---|
| 3791 | "Q\n", |
---|
| 3792 | gro->gsno, gro->shno); |
---|
| 3793 | } |
---|
| 3794 | /* Variable alpha and color: Shader Object for the colored |
---|
| 3795 | triangle(s) and an extra extended Graphics State |
---|
| 3796 | + Xobject + Shader object for the alpha mask */ |
---|
| 3797 | else if(t.prop & T_VAR_COLOR && t.prop & T_VAR_ALPHA){ |
---|
| 3798 | gl2ps->streamlength += gl2psPrintf("q\n" |
---|
| 3799 | "/GS%d gs\n" |
---|
| 3800 | "/TrG%d Do\n" |
---|
| 3801 | "/Sh%d sh\n" |
---|
| 3802 | "Q\n", |
---|
| 3803 | gro->gsno, gro->trgroupno, gro->shno); |
---|
| 3804 | } |
---|
| 3805 | break; |
---|
| 3806 | case GL2PS_PIXMAP: |
---|
| 3807 | for(j = 0; j <= lastel; ++j){ |
---|
| 3808 | prim = *(GL2PSprimitive**)gl2psListPointer(gro->ptrlist, j); |
---|
| 3809 | gl2psPutPDFImage(prim->data.image, gro->imno, prim->verts[0].xyz[0], |
---|
| 3810 | prim->verts[0].xyz[1]); |
---|
| 3811 | } |
---|
| 3812 | break; |
---|
| 3813 | case GL2PS_TEXT: |
---|
| 3814 | for(j = 0; j <= lastel; ++j){ |
---|
| 3815 | prim = *(GL2PSprimitive**)gl2psListPointer(gro->ptrlist, j); |
---|
| 3816 | gl2ps->streamlength += gl2psPrintPDFFillColor(prim->verts[0].rgba); |
---|
| 3817 | gl2psPutPDFText(prim->data.text, gro->fontno, prim->verts[0].xyz[0], |
---|
| 3818 | prim->verts[0].xyz[1]); |
---|
| 3819 | } |
---|
| 3820 | break; |
---|
| 3821 | default: |
---|
| 3822 | break; |
---|
| 3823 | } |
---|
| 3824 | } |
---|
| 3825 | } |
---|
| 3826 | |
---|
| 3827 | /* Graphics State names */ |
---|
| 3828 | |
---|
| 3829 | static int gl2psPDFgroupListWriteGStateResources(void) |
---|
| 3830 | { |
---|
| 3831 | GL2PSpdfgroup *gro; |
---|
| 3832 | int offs = 0; |
---|
| 3833 | int i; |
---|
| 3834 | |
---|
| 3835 | offs += fprintf(gl2ps->stream, |
---|
| 3836 | "/ExtGState\n" |
---|
| 3837 | "<<\n" |
---|
| 3838 | "/GSa 7 0 R\n"); |
---|
| 3839 | for(i = 0; i < gl2psListNbr(gl2ps->pdfgrouplist); ++i){ |
---|
| 3840 | gro = (GL2PSpdfgroup*)gl2psListPointer(gl2ps->pdfgrouplist, i); |
---|
| 3841 | if(gro->gsno >= 0) |
---|
| 3842 | offs += fprintf(gl2ps->stream, "/GS%d %d 0 R\n", gro->gsno, gro->gsobjno); |
---|
| 3843 | } |
---|
| 3844 | offs += fprintf(gl2ps->stream, ">>\n"); |
---|
| 3845 | return offs; |
---|
| 3846 | } |
---|
| 3847 | |
---|
| 3848 | /* Main Shader names */ |
---|
| 3849 | |
---|
| 3850 | static int gl2psPDFgroupListWriteShaderResources(void) |
---|
| 3851 | { |
---|
| 3852 | GL2PSpdfgroup *gro; |
---|
| 3853 | int offs = 0; |
---|
| 3854 | int i; |
---|
| 3855 | |
---|
| 3856 | offs += fprintf(gl2ps->stream, |
---|
| 3857 | "/Shading\n" |
---|
| 3858 | "<<\n"); |
---|
| 3859 | for(i = 0; i < gl2psListNbr(gl2ps->pdfgrouplist); ++i){ |
---|
| 3860 | gro = (GL2PSpdfgroup*)gl2psListPointer(gl2ps->pdfgrouplist, i); |
---|
| 3861 | if(gro->shno >= 0) |
---|
| 3862 | offs += fprintf(gl2ps->stream, "/Sh%d %d 0 R\n", gro->shno, gro->shobjno); |
---|
| 3863 | if(gro->maskshno >= 0) |
---|
| 3864 | offs += fprintf(gl2ps->stream, "/TrSh%d %d 0 R\n", gro->maskshno, gro->maskshobjno); |
---|
| 3865 | } |
---|
| 3866 | offs += fprintf(gl2ps->stream,">>\n"); |
---|
| 3867 | return offs; |
---|
| 3868 | } |
---|
| 3869 | |
---|
| 3870 | /* Images & Mask Shader XObject names */ |
---|
| 3871 | |
---|
| 3872 | static int gl2psPDFgroupListWriteXObjectResources(void) |
---|
| 3873 | { |
---|
| 3874 | int i; |
---|
| 3875 | GL2PSprimitive *p = NULL; |
---|
| 3876 | GL2PSpdfgroup *gro; |
---|
| 3877 | int offs = 0; |
---|
| 3878 | |
---|
| 3879 | offs += fprintf(gl2ps->stream, |
---|
| 3880 | "/XObject\n" |
---|
| 3881 | "<<\n"); |
---|
| 3882 | |
---|
| 3883 | for(i = 0; i < gl2psListNbr(gl2ps->pdfgrouplist); ++i){ |
---|
| 3884 | gro = (GL2PSpdfgroup*)gl2psListPointer(gl2ps->pdfgrouplist, i); |
---|
| 3885 | if(!gl2psListNbr(gro->ptrlist)) |
---|
| 3886 | continue; |
---|
| 3887 | p = *(GL2PSprimitive**)gl2psListPointer(gro->ptrlist, 0); |
---|
| 3888 | switch(p->type){ |
---|
| 3889 | case GL2PS_PIXMAP: |
---|
| 3890 | gro->imobjno = gl2ps->objects_stack++; |
---|
| 3891 | if(GL_RGBA == p->data.image->format) /* reserve one object for image mask */ |
---|
| 3892 | gl2ps->objects_stack++; |
---|
| 3893 | offs += fprintf(gl2ps->stream, "/Im%d %d 0 R\n", gro->imno, gro->imobjno); |
---|
| 3894 | case GL2PS_TRIANGLE: |
---|
| 3895 | if(gro->trgroupno >=0) |
---|
| 3896 | offs += fprintf(gl2ps->stream, "/TrG%d %d 0 R\n", gro->trgroupno, gro->trgroupobjno); |
---|
| 3897 | break; |
---|
| 3898 | default: |
---|
| 3899 | break; |
---|
| 3900 | } |
---|
| 3901 | } |
---|
| 3902 | offs += fprintf(gl2ps->stream,">>\n"); |
---|
| 3903 | return offs; |
---|
| 3904 | } |
---|
| 3905 | |
---|
| 3906 | /* Font names */ |
---|
| 3907 | |
---|
| 3908 | static int gl2psPDFgroupListWriteFontResources(void) |
---|
| 3909 | { |
---|
| 3910 | int i; |
---|
| 3911 | GL2PSpdfgroup *gro; |
---|
| 3912 | int offs = 0; |
---|
| 3913 | |
---|
| 3914 | offs += fprintf(gl2ps->stream, "/Font\n<<\n"); |
---|
| 3915 | |
---|
| 3916 | for(i = 0; i < gl2psListNbr(gl2ps->pdfgrouplist); ++i){ |
---|
| 3917 | gro = (GL2PSpdfgroup*)gl2psListPointer(gl2ps->pdfgrouplist, i); |
---|
| 3918 | if(gro->fontno < 0) |
---|
| 3919 | continue; |
---|
| 3920 | gro->fontobjno = gl2ps->objects_stack++; |
---|
| 3921 | offs += fprintf(gl2ps->stream, "/F%d %d 0 R\n", gro->fontno, gro->fontobjno); |
---|
| 3922 | } |
---|
| 3923 | offs += fprintf(gl2ps->stream, ">>\n"); |
---|
| 3924 | |
---|
| 3925 | return offs; |
---|
| 3926 | } |
---|
| 3927 | |
---|
| 3928 | static void gl2psPDFgroupListDelete(void) |
---|
| 3929 | { |
---|
| 3930 | int i; |
---|
| 3931 | GL2PSpdfgroup *gro = NULL; |
---|
| 3932 | |
---|
| 3933 | if(!gl2ps->pdfgrouplist) |
---|
| 3934 | return; |
---|
| 3935 | |
---|
| 3936 | for(i = 0; i < gl2psListNbr(gl2ps->pdfgrouplist); ++i){ |
---|
| 3937 | gro = (GL2PSpdfgroup*)gl2psListPointer(gl2ps->pdfgrouplist,i); |
---|
| 3938 | gl2psListDelete(gro->ptrlist); |
---|
| 3939 | } |
---|
| 3940 | |
---|
| 3941 | gl2psListDelete(gl2ps->pdfgrouplist); |
---|
| 3942 | gl2ps->pdfgrouplist = NULL; |
---|
| 3943 | } |
---|
| 3944 | |
---|
| 3945 | /* Print 1st PDF object - file info */ |
---|
| 3946 | |
---|
| 3947 | static int gl2psPrintPDFInfo(void) |
---|
| 3948 | { |
---|
| 3949 | int offs; |
---|
| 3950 | time_t now; |
---|
| 3951 | struct tm *newtime; |
---|
| 3952 | |
---|
| 3953 | time(&now); |
---|
| 3954 | newtime = gmtime(&now); |
---|
| 3955 | |
---|
| 3956 | offs = fprintf(gl2ps->stream, |
---|
| 3957 | "1 0 obj\n" |
---|
| 3958 | "<<\n" |
---|
| 3959 | "/Title (%s)\n" |
---|
| 3960 | "/Creator (GL2PS %d.%d.%d%s, %s)\n" |
---|
| 3961 | "/Producer (%s)\n", |
---|
| 3962 | gl2ps->title, GL2PS_MAJOR_VERSION, GL2PS_MINOR_VERSION, |
---|
| 3963 | GL2PS_PATCH_VERSION, GL2PS_EXTRA_VERSION, GL2PS_COPYRIGHT, |
---|
| 3964 | gl2ps->producer); |
---|
| 3965 | |
---|
| 3966 | if(!newtime){ |
---|
| 3967 | offs += fprintf(gl2ps->stream, |
---|
| 3968 | ">>\n" |
---|
| 3969 | "endobj\n"); |
---|
| 3970 | return offs; |
---|
| 3971 | } |
---|
| 3972 | |
---|
| 3973 | offs += fprintf(gl2ps->stream, |
---|
| 3974 | "/CreationDate (D:%d%02d%02d%02d%02d%02d)\n" |
---|
| 3975 | ">>\n" |
---|
| 3976 | "endobj\n", |
---|
| 3977 | newtime->tm_year+1900, |
---|
| 3978 | newtime->tm_mon+1, |
---|
| 3979 | newtime->tm_mday, |
---|
| 3980 | newtime->tm_hour, |
---|
| 3981 | newtime->tm_min, |
---|
| 3982 | newtime->tm_sec); |
---|
| 3983 | return offs; |
---|
| 3984 | } |
---|
| 3985 | |
---|
| 3986 | /* Create catalog and page structure - 2nd and 3th PDF object */ |
---|
| 3987 | |
---|
| 3988 | static int gl2psPrintPDFCatalog(void) |
---|
| 3989 | { |
---|
| 3990 | return fprintf(gl2ps->stream, |
---|
| 3991 | "2 0 obj\n" |
---|
| 3992 | "<<\n" |
---|
| 3993 | "/Type /Catalog\n" |
---|
| 3994 | "/Pages 3 0 R\n" |
---|
| 3995 | ">>\n" |
---|
| 3996 | "endobj\n"); |
---|
| 3997 | } |
---|
| 3998 | |
---|
| 3999 | static int gl2psPrintPDFPages(void) |
---|
| 4000 | { |
---|
| 4001 | return fprintf(gl2ps->stream, |
---|
| 4002 | "3 0 obj\n" |
---|
| 4003 | "<<\n" |
---|
| 4004 | "/Type /Pages\n" |
---|
| 4005 | "/Kids [6 0 R]\n" |
---|
| 4006 | "/Count 1\n" |
---|
| 4007 | ">>\n" |
---|
| 4008 | "endobj\n"); |
---|
| 4009 | } |
---|
| 4010 | |
---|
| 4011 | /* Open stream for data - graphical objects, fonts etc. PDF object 4 */ |
---|
| 4012 | |
---|
| 4013 | static int gl2psOpenPDFDataStream(void) |
---|
| 4014 | { |
---|
| 4015 | int offs = 0; |
---|
| 4016 | |
---|
| 4017 | offs += fprintf(gl2ps->stream, |
---|
| 4018 | "4 0 obj\n" |
---|
| 4019 | "<<\n" |
---|
| 4020 | "/Length 5 0 R\n" ); |
---|
| 4021 | offs += gl2psPrintPDFCompressorType(); |
---|
| 4022 | offs += fprintf(gl2ps->stream, |
---|
| 4023 | ">>\n" |
---|
| 4024 | "stream\n"); |
---|
| 4025 | return offs; |
---|
| 4026 | } |
---|
| 4027 | |
---|
| 4028 | /* Stream setup - Graphics state, fill background if allowed */ |
---|
| 4029 | |
---|
| 4030 | static int gl2psOpenPDFDataStreamWritePreface(void) |
---|
| 4031 | { |
---|
| 4032 | int offs; |
---|
| 4033 | |
---|
| 4034 | offs = gl2psPrintf("/GSa gs\n"); |
---|
| 4035 | |
---|
| 4036 | if(gl2ps->options & GL2PS_DRAW_BACKGROUND){ |
---|
| 4037 | offs += gl2psPrintPDFFillColor(gl2ps->bgcolor); |
---|
| 4038 | offs += gl2psPrintf("%d %d %d %d re\n", |
---|
| 4039 | (int)gl2ps->viewport[0], (int)gl2ps->viewport[1], |
---|
| 4040 | (int)gl2ps->viewport[2], (int)gl2ps->viewport[3]); |
---|
| 4041 | offs += gl2psPrintf("f\n"); |
---|
| 4042 | } |
---|
| 4043 | return offs; |
---|
| 4044 | } |
---|
| 4045 | |
---|
| 4046 | /* Use the functions above to create the first part of the PDF*/ |
---|
| 4047 | |
---|
| 4048 | static void gl2psPrintPDFHeader(void) |
---|
| 4049 | { |
---|
| 4050 | int offs = 0; |
---|
| 4051 | gl2ps->pdfprimlist = gl2psListCreate(500, 500, sizeof(GL2PSprimitive*)); |
---|
| 4052 | gl2psPDFstacksInit(); |
---|
| 4053 | |
---|
| 4054 | gl2ps->xreflist = (int*)gl2psMalloc(sizeof(int) * gl2ps->objects_stack); |
---|
| 4055 | |
---|
| 4056 | #if defined(GL2PS_HAVE_ZLIB) |
---|
| 4057 | if(gl2ps->options & GL2PS_COMPRESS){ |
---|
| 4058 | gl2psSetupCompress(); |
---|
| 4059 | } |
---|
| 4060 | #endif |
---|
| 4061 | gl2ps->xreflist[0] = 0; |
---|
| 4062 | offs += fprintf(gl2ps->stream, "%%PDF-1.4\n"); |
---|
| 4063 | gl2ps->xreflist[1] = offs; |
---|
| 4064 | |
---|
| 4065 | offs += gl2psPrintPDFInfo(); |
---|
| 4066 | gl2ps->xreflist[2] = offs; |
---|
| 4067 | |
---|
| 4068 | offs += gl2psPrintPDFCatalog(); |
---|
| 4069 | gl2ps->xreflist[3] = offs; |
---|
| 4070 | |
---|
| 4071 | offs += gl2psPrintPDFPages(); |
---|
| 4072 | gl2ps->xreflist[4] = offs; |
---|
| 4073 | |
---|
| 4074 | offs += gl2psOpenPDFDataStream(); |
---|
| 4075 | gl2ps->xreflist[5] = offs; /* finished in gl2psPrintPDFFooter */ |
---|
| 4076 | gl2ps->streamlength = gl2psOpenPDFDataStreamWritePreface(); |
---|
| 4077 | } |
---|
| 4078 | |
---|
| 4079 | /* The central primitive drawing */ |
---|
| 4080 | |
---|
| 4081 | static void gl2psPrintPDFPrimitive(void *data) |
---|
| 4082 | { |
---|
| 4083 | GL2PSprimitive *prim = *(GL2PSprimitive**)data; |
---|
| 4084 | |
---|
| 4085 | if((gl2ps->options & GL2PS_OCCLUSION_CULL) && prim->culled) |
---|
| 4086 | return; |
---|
| 4087 | |
---|
| 4088 | prim = gl2psCopyPrimitive(prim); /* deep copy */ |
---|
| 4089 | gl2psListAdd(gl2ps->pdfprimlist, &prim); |
---|
| 4090 | } |
---|
| 4091 | |
---|
| 4092 | /* close stream and ... */ |
---|
| 4093 | |
---|
| 4094 | static int gl2psClosePDFDataStream(void) |
---|
| 4095 | { |
---|
| 4096 | int offs = 0; |
---|
| 4097 | |
---|
| 4098 | #if defined(GL2PS_HAVE_ZLIB) |
---|
| 4099 | if(gl2ps->options & GL2PS_COMPRESS){ |
---|
| 4100 | if(Z_OK != gl2psDeflate()) |
---|
| 4101 | gl2psMsg(GL2PS_ERROR, "Zlib deflate error"); |
---|
| 4102 | else |
---|
| 4103 | fwrite(gl2ps->compress->dest, gl2ps->compress->destLen, 1, gl2ps->stream); |
---|
| 4104 | gl2ps->streamlength += gl2ps->compress->destLen; |
---|
| 4105 | |
---|
| 4106 | offs += gl2ps->streamlength; |
---|
| 4107 | gl2psFreeCompress(); |
---|
| 4108 | } |
---|
| 4109 | #endif |
---|
| 4110 | |
---|
| 4111 | offs += fprintf(gl2ps->stream, |
---|
| 4112 | "endstream\n" |
---|
| 4113 | "endobj\n"); |
---|
| 4114 | return offs; |
---|
| 4115 | } |
---|
| 4116 | |
---|
| 4117 | /* ... write the now known length object */ |
---|
| 4118 | |
---|
| 4119 | static int gl2psPrintPDFDataStreamLength(int val) |
---|
| 4120 | { |
---|
| 4121 | return fprintf(gl2ps->stream, |
---|
| 4122 | "5 0 obj\n" |
---|
| 4123 | "%d\n" |
---|
| 4124 | "endobj\n", val); |
---|
| 4125 | } |
---|
| 4126 | |
---|
| 4127 | /* Put the info created before in PDF objects */ |
---|
| 4128 | |
---|
| 4129 | static int gl2psPrintPDFOpenPage(void) |
---|
| 4130 | { |
---|
| 4131 | int offs; |
---|
| 4132 | |
---|
| 4133 | /* Write fixed part */ |
---|
| 4134 | |
---|
| 4135 | offs = fprintf(gl2ps->stream, |
---|
| 4136 | "6 0 obj\n" |
---|
| 4137 | "<<\n" |
---|
| 4138 | "/Type /Page\n" |
---|
| 4139 | "/Parent 3 0 R\n" |
---|
| 4140 | "/MediaBox [%d %d %d %d]\n", |
---|
| 4141 | (int)gl2ps->viewport[0], (int)gl2ps->viewport[1], |
---|
| 4142 | (int)gl2ps->viewport[2], (int)gl2ps->viewport[3]); |
---|
| 4143 | |
---|
| 4144 | if(gl2ps->options & GL2PS_LANDSCAPE) |
---|
| 4145 | offs += fprintf(gl2ps->stream, "/Rotate -90\n"); |
---|
| 4146 | |
---|
| 4147 | offs += fprintf(gl2ps->stream, |
---|
| 4148 | "/Contents 4 0 R\n" |
---|
| 4149 | "/Resources\n" |
---|
| 4150 | "<<\n" |
---|
| 4151 | "/ProcSet [/PDF /Text /ImageB /ImageC] %%/ImageI\n"); |
---|
| 4152 | |
---|
| 4153 | return offs; |
---|
| 4154 | |
---|
| 4155 | /* End fixed part, proceeds in gl2psPDFgroupListWriteVariableResources() */ |
---|
| 4156 | } |
---|
| 4157 | |
---|
| 4158 | static int gl2psPDFgroupListWriteVariableResources(void) |
---|
| 4159 | { |
---|
| 4160 | int offs = 0; |
---|
| 4161 | |
---|
| 4162 | /* a) Graphics States for shader alpha masks*/ |
---|
| 4163 | offs += gl2psPDFgroupListWriteGStateResources(); |
---|
| 4164 | |
---|
| 4165 | /* b) Shader and shader masks */ |
---|
| 4166 | offs += gl2psPDFgroupListWriteShaderResources(); |
---|
| 4167 | |
---|
| 4168 | /* c) XObjects (Images & Shader Masks) */ |
---|
| 4169 | offs += gl2psPDFgroupListWriteXObjectResources(); |
---|
| 4170 | |
---|
| 4171 | /* d) Fonts */ |
---|
| 4172 | offs += gl2psPDFgroupListWriteFontResources(); |
---|
| 4173 | |
---|
| 4174 | /* End resources and page */ |
---|
| 4175 | offs += fprintf(gl2ps->stream, |
---|
| 4176 | ">>\n" |
---|
| 4177 | ">>\n" |
---|
| 4178 | "endobj\n"); |
---|
| 4179 | return offs; |
---|
| 4180 | } |
---|
| 4181 | |
---|
| 4182 | /* Standard Graphics State */ |
---|
| 4183 | |
---|
| 4184 | static int gl2psPrintPDFGSObject(void) |
---|
| 4185 | { |
---|
| 4186 | return fprintf(gl2ps->stream, |
---|
| 4187 | "7 0 obj\n" |
---|
| 4188 | "<<\n" |
---|
| 4189 | "/Type /ExtGState\n" |
---|
| 4190 | "/SA false\n" |
---|
| 4191 | "/SM 0.02\n" |
---|
| 4192 | "/OP false\n" |
---|
| 4193 | "/op false\n" |
---|
| 4194 | "/OPM 0\n" |
---|
| 4195 | "/BG2 /Default\n" |
---|
| 4196 | "/UCR2 /Default\n" |
---|
| 4197 | "/TR2 /Default\n" |
---|
| 4198 | ">>\n" |
---|
| 4199 | "endobj\n"); |
---|
| 4200 | } |
---|
| 4201 | |
---|
| 4202 | /* Put vertex' edge flag (8bit) and coordinates (32bit) in shader stream */ |
---|
| 4203 | |
---|
| 4204 | static int gl2psPrintPDFShaderStreamDataCoord(GL2PSvertex *vertex, |
---|
| 4205 | size_t (*action)(unsigned long data, |
---|
| 4206 | size_t size), |
---|
| 4207 | GLfloat dx, GLfloat dy, |
---|
| 4208 | GLfloat xmin, GLfloat ymin) |
---|
| 4209 | { |
---|
| 4210 | int offs = 0; |
---|
| 4211 | unsigned long imap; |
---|
| 4212 | GLfloat diff; |
---|
| 4213 | double dmax = ~1UL; |
---|
| 4214 | char edgeflag = 0; |
---|
| 4215 | |
---|
| 4216 | /* FIXME: temp bux fix for 64 bit archs: */ |
---|
| 4217 | if(sizeof(unsigned long) == 8) dmax = dmax - 2048.; |
---|
| 4218 | |
---|
| 4219 | offs += (*action)(edgeflag, 1); |
---|
| 4220 | |
---|
| 4221 | /* The Shader stream in PDF requires to be in a 'big-endian' |
---|
| 4222 | order */ |
---|
| 4223 | |
---|
| 4224 | if(GL2PS_ZERO(dx * dy)){ |
---|
| 4225 | offs += (*action)(0, 4); |
---|
| 4226 | offs += (*action)(0, 4); |
---|
| 4227 | } |
---|
| 4228 | else{ |
---|
| 4229 | diff = (vertex->xyz[0] - xmin) / dx; |
---|
| 4230 | if(diff > 1) |
---|
| 4231 | diff = 1.0F; |
---|
| 4232 | else if(diff < 0) |
---|
| 4233 | diff = 0.0F; |
---|
| 4234 | imap = (unsigned long)(diff * dmax); |
---|
| 4235 | offs += (*action)(imap, 4); |
---|
| 4236 | |
---|
| 4237 | diff = (vertex->xyz[1] - ymin) / dy; |
---|
| 4238 | if(diff > 1) |
---|
| 4239 | diff = 1.0F; |
---|
| 4240 | else if(diff < 0) |
---|
| 4241 | diff = 0.0F; |
---|
| 4242 | imap = (unsigned long)(diff * dmax); |
---|
| 4243 | offs += (*action)(imap, 4); |
---|
| 4244 | } |
---|
| 4245 | |
---|
| 4246 | return offs; |
---|
| 4247 | } |
---|
| 4248 | |
---|
| 4249 | /* Put vertex' rgb value (8bit for every component) in shader stream */ |
---|
| 4250 | |
---|
| 4251 | static int gl2psPrintPDFShaderStreamDataRGB(GL2PSvertex *vertex, |
---|
| 4252 | size_t (*action)(unsigned long data, |
---|
| 4253 | size_t size)) |
---|
| 4254 | { |
---|
| 4255 | int offs = 0; |
---|
| 4256 | unsigned long imap; |
---|
| 4257 | double dmax = ~1UL; |
---|
| 4258 | |
---|
| 4259 | /* FIXME: temp bux fix for 64 bit archs: */ |
---|
| 4260 | if(sizeof(unsigned long) == 8) dmax = dmax - 2048.; |
---|
| 4261 | |
---|
| 4262 | imap = (unsigned long)((vertex->rgba[0]) * dmax); |
---|
| 4263 | offs += (*action)(imap, 1); |
---|
| 4264 | |
---|
| 4265 | imap = (unsigned long)((vertex->rgba[1]) * dmax); |
---|
| 4266 | offs += (*action)(imap, 1); |
---|
| 4267 | |
---|
| 4268 | imap = (unsigned long)((vertex->rgba[2]) * dmax); |
---|
| 4269 | offs += (*action)(imap, 1); |
---|
| 4270 | |
---|
| 4271 | return offs; |
---|
| 4272 | } |
---|
| 4273 | |
---|
| 4274 | /* Put vertex' alpha (8/16bit) in shader stream */ |
---|
| 4275 | |
---|
| 4276 | static int gl2psPrintPDFShaderStreamDataAlpha(GL2PSvertex *vertex, |
---|
| 4277 | size_t (*action)(unsigned long data, |
---|
| 4278 | size_t size), |
---|
| 4279 | int sigbyte) |
---|
| 4280 | { |
---|
| 4281 | int offs = 0; |
---|
| 4282 | unsigned long imap; |
---|
| 4283 | double dmax = ~1UL; |
---|
| 4284 | |
---|
| 4285 | /* FIXME: temp bux fix for 64 bit archs: */ |
---|
| 4286 | if(sizeof(unsigned long) == 8) dmax = dmax - 2048.; |
---|
| 4287 | |
---|
| 4288 | if(sigbyte != 8 && sigbyte != 16) |
---|
| 4289 | sigbyte = 8; |
---|
| 4290 | |
---|
| 4291 | sigbyte /= 8; |
---|
| 4292 | |
---|
| 4293 | imap = (unsigned long)((vertex->rgba[3]) * dmax); |
---|
| 4294 | |
---|
| 4295 | offs += (*action)(imap, sigbyte); |
---|
| 4296 | |
---|
| 4297 | return offs; |
---|
| 4298 | } |
---|
| 4299 | |
---|
| 4300 | /* Put a triangles raw data in shader stream */ |
---|
| 4301 | |
---|
| 4302 | static int gl2psPrintPDFShaderStreamData(GL2PStriangle *triangle, |
---|
| 4303 | GLfloat dx, GLfloat dy, |
---|
| 4304 | GLfloat xmin, GLfloat ymin, |
---|
| 4305 | size_t (*action)(unsigned long data, |
---|
| 4306 | size_t size), |
---|
| 4307 | int gray) |
---|
| 4308 | { |
---|
| 4309 | int i, offs = 0; |
---|
| 4310 | GL2PSvertex v; |
---|
| 4311 | |
---|
| 4312 | if(gray && gray != 8 && gray != 16) |
---|
| 4313 | gray = 8; |
---|
| 4314 | |
---|
| 4315 | for(i = 0; i < 3; ++i){ |
---|
| 4316 | offs += gl2psPrintPDFShaderStreamDataCoord(&triangle->vertex[i], action, |
---|
| 4317 | dx, dy, xmin, ymin); |
---|
| 4318 | if(gray){ |
---|
| 4319 | v = triangle->vertex[i]; |
---|
| 4320 | offs += gl2psPrintPDFShaderStreamDataAlpha(&v, action, gray); |
---|
| 4321 | } |
---|
| 4322 | else{ |
---|
| 4323 | offs += gl2psPrintPDFShaderStreamDataRGB(&triangle->vertex[i], action); |
---|
| 4324 | } |
---|
| 4325 | } |
---|
| 4326 | |
---|
| 4327 | return offs; |
---|
| 4328 | } |
---|
| 4329 | |
---|
| 4330 | static void gl2psPDFRectHull(GLfloat *xmin, GLfloat *xmax, |
---|
| 4331 | GLfloat *ymin, GLfloat *ymax, |
---|
| 4332 | GL2PStriangle *triangles, int cnt) |
---|
| 4333 | { |
---|
| 4334 | int i, j; |
---|
| 4335 | |
---|
| 4336 | *xmin = triangles[0].vertex[0].xyz[0]; |
---|
| 4337 | *xmax = triangles[0].vertex[0].xyz[0]; |
---|
| 4338 | *ymin = triangles[0].vertex[0].xyz[1]; |
---|
| 4339 | *ymax = triangles[0].vertex[0].xyz[1]; |
---|
| 4340 | |
---|
| 4341 | for(i = 0; i < cnt; ++i){ |
---|
| 4342 | for(j = 0; j < 3; ++j){ |
---|
| 4343 | if(*xmin > triangles[i].vertex[j].xyz[0]) |
---|
| 4344 | *xmin = triangles[i].vertex[j].xyz[0]; |
---|
| 4345 | if(*xmax < triangles[i].vertex[j].xyz[0]) |
---|
| 4346 | *xmax = triangles[i].vertex[j].xyz[0]; |
---|
| 4347 | if(*ymin > triangles[i].vertex[j].xyz[1]) |
---|
| 4348 | *ymin = triangles[i].vertex[j].xyz[1]; |
---|
| 4349 | if(*ymax < triangles[i].vertex[j].xyz[1]) |
---|
| 4350 | *ymax = triangles[i].vertex[j].xyz[1]; |
---|
| 4351 | } |
---|
| 4352 | } |
---|
| 4353 | } |
---|
| 4354 | |
---|
| 4355 | /* Writes shaded triangle |
---|
| 4356 | gray == 0 means write RGB triangles |
---|
| 4357 | gray == 8 8bit-grayscale (for alpha masks) |
---|
| 4358 | gray == 16 16bit-grayscale (for alpha masks) */ |
---|
| 4359 | |
---|
| 4360 | static int gl2psPrintPDFShader(int obj, GL2PStriangle *triangles, |
---|
| 4361 | int size, int gray) |
---|
| 4362 | { |
---|
| 4363 | int i, offs = 0, vertexbytes, done = 0; |
---|
| 4364 | GLfloat xmin, xmax, ymin, ymax; |
---|
| 4365 | |
---|
| 4366 | switch(gray){ |
---|
| 4367 | case 0: |
---|
| 4368 | vertexbytes = 1+4+4+1+1+1; |
---|
| 4369 | break; |
---|
| 4370 | case 8: |
---|
| 4371 | vertexbytes = 1+4+4+1; |
---|
| 4372 | break; |
---|
| 4373 | case 16: |
---|
| 4374 | vertexbytes = 1+4+4+2; |
---|
| 4375 | break; |
---|
| 4376 | default: |
---|
| 4377 | gray = 8; |
---|
| 4378 | vertexbytes = 1+4+4+1; |
---|
| 4379 | break; |
---|
| 4380 | } |
---|
| 4381 | |
---|
| 4382 | gl2psPDFRectHull(&xmin, &xmax, &ymin, &ymax, triangles, size); |
---|
| 4383 | |
---|
| 4384 | offs += fprintf(gl2ps->stream, |
---|
| 4385 | "%d 0 obj\n" |
---|
| 4386 | "<< " |
---|
| 4387 | "/ShadingType 4 " |
---|
| 4388 | "/ColorSpace %s " |
---|
| 4389 | "/BitsPerCoordinate 32 " |
---|
| 4390 | "/BitsPerComponent %d " |
---|
| 4391 | "/BitsPerFlag 8 " |
---|
| 4392 | "/Decode [%f %f %f %f 0 1 %s] ", |
---|
| 4393 | obj, |
---|
| 4394 | (gray) ? "/DeviceGray" : "/DeviceRGB", |
---|
| 4395 | (gray) ? gray : 8, |
---|
| 4396 | xmin, xmax, ymin, ymax, |
---|
| 4397 | (gray) ? "" : "0 1 0 1"); |
---|
| 4398 | |
---|
| 4399 | #if defined(GL2PS_HAVE_ZLIB) |
---|
| 4400 | if(gl2ps->options & GL2PS_COMPRESS){ |
---|
| 4401 | gl2psAllocCompress(vertexbytes * size * 3); |
---|
| 4402 | |
---|
| 4403 | for(i = 0; i < size; ++i) |
---|
| 4404 | gl2psPrintPDFShaderStreamData(&triangles[i], |
---|
| 4405 | xmax-xmin, ymax-ymin, xmin, ymin, |
---|
| 4406 | gl2psWriteBigEndianCompress, gray); |
---|
| 4407 | |
---|
| 4408 | if(Z_OK == gl2psDeflate() && 23 + gl2ps->compress->destLen < gl2ps->compress->srcLen){ |
---|
| 4409 | offs += gl2psPrintPDFCompressorType(); |
---|
| 4410 | offs += fprintf(gl2ps->stream, |
---|
| 4411 | "/Length %d " |
---|
| 4412 | ">>\n" |
---|
| 4413 | "stream\n", |
---|
| 4414 | (int)gl2ps->compress->destLen); |
---|
| 4415 | offs += gl2ps->compress->destLen * fwrite(gl2ps->compress->dest, |
---|
| 4416 | gl2ps->compress->destLen, |
---|
| 4417 | 1, gl2ps->stream); |
---|
| 4418 | done = 1; |
---|
| 4419 | } |
---|
| 4420 | gl2psFreeCompress(); |
---|
| 4421 | } |
---|
| 4422 | #endif |
---|
| 4423 | |
---|
| 4424 | if(!done){ |
---|
| 4425 | /* no compression, or too long after compression, or compress error |
---|
| 4426 | -> write non-compressed entry */ |
---|
| 4427 | offs += fprintf(gl2ps->stream, |
---|
| 4428 | "/Length %d " |
---|
| 4429 | ">>\n" |
---|
| 4430 | "stream\n", |
---|
| 4431 | vertexbytes * 3 * size); |
---|
| 4432 | for(i = 0; i < size; ++i) |
---|
| 4433 | offs += gl2psPrintPDFShaderStreamData(&triangles[i], |
---|
| 4434 | xmax-xmin, ymax-ymin, xmin, ymin, |
---|
| 4435 | gl2psWriteBigEndian, gray); |
---|
| 4436 | } |
---|
| 4437 | |
---|
| 4438 | offs += fprintf(gl2ps->stream, |
---|
| 4439 | "\nendstream\n" |
---|
| 4440 | "endobj\n"); |
---|
| 4441 | |
---|
| 4442 | return offs; |
---|
| 4443 | } |
---|
| 4444 | |
---|
| 4445 | /* Writes a XObject for a shaded triangle mask */ |
---|
| 4446 | |
---|
| 4447 | static int gl2psPrintPDFShaderMask(int obj, int childobj) |
---|
| 4448 | { |
---|
| 4449 | int offs = 0, len; |
---|
| 4450 | |
---|
| 4451 | offs += fprintf(gl2ps->stream, |
---|
| 4452 | "%d 0 obj\n" |
---|
| 4453 | "<<\n" |
---|
| 4454 | "/Type /XObject\n" |
---|
| 4455 | "/Subtype /Form\n" |
---|
| 4456 | "/BBox [ %d %d %d %d ]\n" |
---|
| 4457 | "/Group \n<<\n/S /Transparency /CS /DeviceRGB\n" |
---|
| 4458 | ">>\n", |
---|
| 4459 | obj, |
---|
| 4460 | (int)gl2ps->viewport[0], (int)gl2ps->viewport[1], |
---|
| 4461 | (int)gl2ps->viewport[2], (int)gl2ps->viewport[3]); |
---|
| 4462 | |
---|
| 4463 | len = (childobj>0) |
---|
| 4464 | ? strlen("/TrSh sh\n") + (int)log10((double)childobj)+1 |
---|
| 4465 | : strlen("/TrSh0 sh\n"); |
---|
| 4466 | |
---|
| 4467 | offs += fprintf(gl2ps->stream, |
---|
| 4468 | "/Length %d\n" |
---|
| 4469 | ">>\n" |
---|
| 4470 | "stream\n", |
---|
| 4471 | len); |
---|
| 4472 | offs += fprintf(gl2ps->stream, |
---|
| 4473 | "/TrSh%d sh\n", |
---|
| 4474 | childobj); |
---|
| 4475 | offs += fprintf(gl2ps->stream, |
---|
| 4476 | "endstream\n" |
---|
| 4477 | "endobj\n"); |
---|
| 4478 | |
---|
| 4479 | return offs; |
---|
| 4480 | } |
---|
| 4481 | |
---|
| 4482 | /* Writes a Extended graphics state for a shaded triangle mask if |
---|
| 4483 | simplealpha ist true the childobj argument is ignored and a /ca |
---|
| 4484 | statement will be written instead */ |
---|
| 4485 | |
---|
| 4486 | static int gl2psPrintPDFShaderExtGS(int obj, int childobj) |
---|
| 4487 | { |
---|
| 4488 | int offs = 0; |
---|
| 4489 | |
---|
| 4490 | offs += fprintf(gl2ps->stream, |
---|
| 4491 | "%d 0 obj\n" |
---|
| 4492 | "<<\n", |
---|
| 4493 | obj); |
---|
| 4494 | |
---|
| 4495 | offs += fprintf(gl2ps->stream, |
---|
| 4496 | "/SMask << /S /Alpha /G %d 0 R >> ", |
---|
| 4497 | childobj); |
---|
| 4498 | |
---|
| 4499 | offs += fprintf(gl2ps->stream, |
---|
| 4500 | ">>\n" |
---|
| 4501 | "endobj\n"); |
---|
| 4502 | return offs; |
---|
| 4503 | } |
---|
| 4504 | |
---|
| 4505 | /* a simple graphics state */ |
---|
| 4506 | |
---|
| 4507 | static int gl2psPrintPDFShaderSimpleExtGS(int obj, GLfloat alpha) |
---|
| 4508 | { |
---|
| 4509 | int offs = 0; |
---|
| 4510 | |
---|
| 4511 | offs += fprintf(gl2ps->stream, |
---|
| 4512 | "%d 0 obj\n" |
---|
| 4513 | "<<\n" |
---|
| 4514 | "/ca %g" |
---|
| 4515 | ">>\n" |
---|
| 4516 | "endobj\n", |
---|
| 4517 | obj, alpha); |
---|
| 4518 | return offs; |
---|
| 4519 | } |
---|
| 4520 | |
---|
| 4521 | /* Similar groups of functions for pixmaps and text */ |
---|
| 4522 | |
---|
| 4523 | static int gl2psPrintPDFPixmapStreamData(GL2PSimage *im, |
---|
| 4524 | size_t (*action)(unsigned long data, |
---|
| 4525 | size_t size), |
---|
| 4526 | int gray) |
---|
| 4527 | { |
---|
| 4528 | int x, y; |
---|
| 4529 | GLfloat r, g, b, a; |
---|
| 4530 | |
---|
| 4531 | if(im->format != GL_RGBA && gray) |
---|
| 4532 | return 0; |
---|
| 4533 | |
---|
| 4534 | if(gray && gray !=8 && gray != 16) |
---|
| 4535 | gray = 8; |
---|
| 4536 | |
---|
| 4537 | gray /= 8; |
---|
| 4538 | |
---|
| 4539 | for(y = 0; y < im->height; ++y){ |
---|
| 4540 | for(x = 0; x < im->width; ++x){ |
---|
| 4541 | a = gl2psGetRGB(im, x, y, &r, &g, &b); |
---|
| 4542 | if(im->format == GL_RGBA && gray){ |
---|
| 4543 | (*action)((unsigned long)(a*255) << 24, gray); |
---|
| 4544 | } |
---|
| 4545 | else{ |
---|
| 4546 | (*action)((unsigned long)(r*255) << 24, 1); |
---|
| 4547 | (*action)((unsigned long)(g*255) << 24, 1); |
---|
| 4548 | (*action)((unsigned long)(b*255) << 24, 1); |
---|
| 4549 | } |
---|
| 4550 | } |
---|
| 4551 | } |
---|
| 4552 | |
---|
| 4553 | switch(gray){ |
---|
| 4554 | case 0: return 3 * im->width * im->height; |
---|
| 4555 | case 1: return im->width * im->height; |
---|
| 4556 | case 2: return 2 * im->width * im->height; |
---|
| 4557 | default: return 3 * im->width * im->height; |
---|
| 4558 | } |
---|
| 4559 | } |
---|
| 4560 | |
---|
| 4561 | static int gl2psPrintPDFPixmap(int obj, int childobj, GL2PSimage *im, int gray) |
---|
| 4562 | { |
---|
| 4563 | int offs = 0, done = 0, sigbytes = 3; |
---|
| 4564 | |
---|
| 4565 | if(gray && gray !=8 && gray != 16) |
---|
| 4566 | gray = 8; |
---|
| 4567 | |
---|
| 4568 | if(gray) |
---|
| 4569 | sigbytes = gray / 8; |
---|
| 4570 | |
---|
| 4571 | offs += fprintf(gl2ps->stream, |
---|
| 4572 | "%d 0 obj\n" |
---|
| 4573 | "<<\n" |
---|
| 4574 | "/Type /XObject\n" |
---|
| 4575 | "/Subtype /Image\n" |
---|
| 4576 | "/Width %d\n" |
---|
| 4577 | "/Height %d\n" |
---|
| 4578 | "/ColorSpace %s \n" |
---|
| 4579 | "/BitsPerComponent 8\n", |
---|
| 4580 | obj, |
---|
| 4581 | (int)im->width, (int)im->height, |
---|
| 4582 | (gray) ? "/DeviceGray" : "/DeviceRGB" ); |
---|
| 4583 | if(GL_RGBA == im->format && gray == 0){ |
---|
| 4584 | offs += fprintf(gl2ps->stream, |
---|
| 4585 | "/SMask %d 0 R\n", |
---|
| 4586 | childobj); |
---|
| 4587 | } |
---|
| 4588 | |
---|
| 4589 | #if defined(GL2PS_HAVE_ZLIB) |
---|
| 4590 | if(gl2ps->options & GL2PS_COMPRESS){ |
---|
| 4591 | gl2psAllocCompress((int)(im->width * im->height * sigbytes)); |
---|
| 4592 | |
---|
| 4593 | gl2psPrintPDFPixmapStreamData(im, gl2psWriteBigEndianCompress, gray); |
---|
| 4594 | |
---|
| 4595 | if(Z_OK == gl2psDeflate() && 23 + gl2ps->compress->destLen < gl2ps->compress->srcLen){ |
---|
| 4596 | offs += gl2psPrintPDFCompressorType(); |
---|
| 4597 | offs += fprintf(gl2ps->stream, |
---|
| 4598 | "/Length %d " |
---|
| 4599 | ">>\n" |
---|
| 4600 | "stream\n", |
---|
| 4601 | (int)gl2ps->compress->destLen); |
---|
| 4602 | offs += gl2ps->compress->destLen * fwrite(gl2ps->compress->dest, gl2ps->compress->destLen, |
---|
| 4603 | 1, gl2ps->stream); |
---|
| 4604 | done = 1; |
---|
| 4605 | } |
---|
| 4606 | gl2psFreeCompress(); |
---|
| 4607 | } |
---|
| 4608 | #endif |
---|
| 4609 | |
---|
| 4610 | if(!done){ |
---|
| 4611 | /* no compression, or too long after compression, or compress error |
---|
| 4612 | -> write non-compressed entry */ |
---|
| 4613 | offs += fprintf(gl2ps->stream, |
---|
| 4614 | "/Length %d " |
---|
| 4615 | ">>\n" |
---|
| 4616 | "stream\n", |
---|
| 4617 | (int)(im->width * im->height * sigbytes)); |
---|
| 4618 | offs += gl2psPrintPDFPixmapStreamData(im, gl2psWriteBigEndian, gray); |
---|
| 4619 | } |
---|
| 4620 | |
---|
| 4621 | offs += fprintf(gl2ps->stream, |
---|
| 4622 | "\nendstream\n" |
---|
| 4623 | "endobj\n"); |
---|
| 4624 | |
---|
| 4625 | return offs; |
---|
| 4626 | } |
---|
| 4627 | |
---|
| 4628 | static int gl2psPrintPDFText(int obj, GL2PSstring *s, int fontnumber) |
---|
| 4629 | { |
---|
| 4630 | int offs = 0; |
---|
| 4631 | |
---|
| 4632 | offs += fprintf(gl2ps->stream, |
---|
| 4633 | "%d 0 obj\n" |
---|
| 4634 | "<<\n" |
---|
| 4635 | "/Type /Font\n" |
---|
| 4636 | "/Subtype /Type1\n" |
---|
| 4637 | "/Name /F%d\n" |
---|
| 4638 | "/BaseFont /%s\n" |
---|
| 4639 | "/Encoding /MacRomanEncoding\n" |
---|
| 4640 | ">>\n" |
---|
| 4641 | "endobj\n", |
---|
| 4642 | obj, fontnumber, s->fontname); |
---|
| 4643 | return offs; |
---|
| 4644 | } |
---|
| 4645 | |
---|
| 4646 | /* Write the physical objects */ |
---|
| 4647 | |
---|
| 4648 | static int gl2psPDFgroupListWriteObjects(int entryoffs) |
---|
| 4649 | { |
---|
| 4650 | int i,j; |
---|
| 4651 | GL2PSprimitive *p = NULL; |
---|
| 4652 | GL2PSpdfgroup *gro; |
---|
| 4653 | int offs = entryoffs; |
---|
| 4654 | GL2PStriangle *triangles; |
---|
| 4655 | int size = 0; |
---|
| 4656 | |
---|
| 4657 | if(!gl2ps->pdfgrouplist) |
---|
| 4658 | return offs; |
---|
| 4659 | |
---|
| 4660 | for(i = 0; i < gl2psListNbr(gl2ps->pdfgrouplist); ++i){ |
---|
| 4661 | gro = (GL2PSpdfgroup*)gl2psListPointer(gl2ps->pdfgrouplist, i); |
---|
| 4662 | if(!gl2psListNbr(gro->ptrlist)) |
---|
| 4663 | continue; |
---|
| 4664 | p = *(GL2PSprimitive**)gl2psListPointer(gro->ptrlist, 0); |
---|
| 4665 | switch(p->type){ |
---|
| 4666 | case GL2PS_POINT: |
---|
| 4667 | break; |
---|
| 4668 | case GL2PS_LINE: |
---|
| 4669 | break; |
---|
| 4670 | case GL2PS_TRIANGLE: |
---|
| 4671 | size = gl2psListNbr(gro->ptrlist); |
---|
| 4672 | triangles = (GL2PStriangle*)gl2psMalloc(sizeof(GL2PStriangle) * size); |
---|
| 4673 | for(j = 0; j < size; ++j){ |
---|
| 4674 | p = *(GL2PSprimitive**)gl2psListPointer(gro->ptrlist, j); |
---|
| 4675 | gl2psFillTriangleFromPrimitive(&triangles[j], p, GL_TRUE); |
---|
| 4676 | } |
---|
| 4677 | if(triangles[0].prop & T_VAR_COLOR){ |
---|
| 4678 | gl2ps->xreflist[gro->shobjno] = offs; |
---|
| 4679 | offs += gl2psPrintPDFShader(gro->shobjno, triangles, size, 0); |
---|
| 4680 | } |
---|
| 4681 | if(triangles[0].prop & T_ALPHA_LESS_1){ |
---|
| 4682 | gl2ps->xreflist[gro->gsobjno] = offs; |
---|
| 4683 | offs += gl2psPrintPDFShaderSimpleExtGS(gro->gsobjno, triangles[0].vertex[0].rgba[3]); |
---|
| 4684 | } |
---|
| 4685 | if(triangles[0].prop & T_VAR_ALPHA){ |
---|
| 4686 | gl2ps->xreflist[gro->gsobjno] = offs; |
---|
| 4687 | offs += gl2psPrintPDFShaderExtGS(gro->gsobjno, gro->trgroupobjno); |
---|
| 4688 | gl2ps->xreflist[gro->trgroupobjno] = offs; |
---|
| 4689 | offs += gl2psPrintPDFShaderMask(gro->trgroupobjno, gro->maskshno); |
---|
| 4690 | gl2ps->xreflist[gro->maskshobjno] = offs; |
---|
| 4691 | offs += gl2psPrintPDFShader(gro->maskshobjno, triangles, size, 8); |
---|
| 4692 | } |
---|
| 4693 | gl2psFree(triangles); |
---|
| 4694 | break; |
---|
| 4695 | case GL2PS_PIXMAP: |
---|
| 4696 | gl2ps->xreflist[gro->imobjno] = offs; |
---|
| 4697 | offs += gl2psPrintPDFPixmap(gro->imobjno, gro->imobjno+1, p->data.image, 0); |
---|
| 4698 | if(p->data.image->format == GL_RGBA){ |
---|
| 4699 | gl2ps->xreflist[gro->imobjno+1] = offs; |
---|
| 4700 | offs += gl2psPrintPDFPixmap(gro->imobjno+1, -1, p->data.image, 8); |
---|
| 4701 | } |
---|
| 4702 | break; |
---|
| 4703 | case GL2PS_TEXT: |
---|
| 4704 | gl2ps->xreflist[gro->fontobjno] = offs; |
---|
| 4705 | offs += gl2psPrintPDFText(gro->fontobjno,p->data.text,gro->fontno); |
---|
| 4706 | break; |
---|
| 4707 | case GL2PS_SPECIAL : |
---|
| 4708 | /* alignment contains the format for which the special output text |
---|
| 4709 | is intended */ |
---|
| 4710 | if(p->data.text->alignment == GL2PS_PDF) |
---|
| 4711 | offs += fprintf(gl2ps->stream, "%s\n", p->data.text->str); |
---|
| 4712 | break; |
---|
| 4713 | default: |
---|
| 4714 | break; |
---|
| 4715 | } |
---|
| 4716 | } |
---|
| 4717 | return offs; |
---|
| 4718 | } |
---|
| 4719 | |
---|
| 4720 | /* All variable data has been written at this point and all required |
---|
| 4721 | functioninality has been gathered, so we can write now file footer |
---|
| 4722 | with cross reference table and trailer */ |
---|
| 4723 | |
---|
| 4724 | static void gl2psPrintPDFFooter(void) |
---|
| 4725 | { |
---|
| 4726 | int i, offs; |
---|
| 4727 | |
---|
| 4728 | gl2psPDFgroupListInit(); |
---|
| 4729 | gl2psPDFgroupListWriteMainStream(); |
---|
| 4730 | |
---|
| 4731 | offs = gl2ps->xreflist[5] + gl2ps->streamlength; |
---|
| 4732 | offs += gl2psClosePDFDataStream(); |
---|
| 4733 | gl2ps->xreflist[5] = offs; |
---|
| 4734 | |
---|
| 4735 | offs += gl2psPrintPDFDataStreamLength(gl2ps->streamlength); |
---|
| 4736 | gl2ps->xreflist[6] = offs; |
---|
| 4737 | gl2ps->streamlength = 0; |
---|
| 4738 | |
---|
| 4739 | offs += gl2psPrintPDFOpenPage(); |
---|
| 4740 | offs += gl2psPDFgroupListWriteVariableResources(); |
---|
| 4741 | gl2ps->xreflist = (int*)gl2psRealloc(gl2ps->xreflist, |
---|
| 4742 | sizeof(int) * (gl2ps->objects_stack + 1)); |
---|
| 4743 | gl2ps->xreflist[7] = offs; |
---|
| 4744 | |
---|
| 4745 | offs += gl2psPrintPDFGSObject(); |
---|
| 4746 | gl2ps->xreflist[8] = offs; |
---|
| 4747 | |
---|
| 4748 | gl2ps->xreflist[gl2ps->objects_stack] = |
---|
| 4749 | gl2psPDFgroupListWriteObjects(gl2ps->xreflist[8]); |
---|
| 4750 | |
---|
| 4751 | /* Start cross reference table. The file has to been opened in |
---|
| 4752 | binary mode to preserve the 20 digit string length! */ |
---|
| 4753 | fprintf(gl2ps->stream, |
---|
| 4754 | "xref\n" |
---|
| 4755 | "0 %d\n" |
---|
| 4756 | "%010d 65535 f \n", gl2ps->objects_stack, 0); |
---|
| 4757 | |
---|
| 4758 | for(i = 1; i < gl2ps->objects_stack; ++i) |
---|
| 4759 | fprintf(gl2ps->stream, "%010d 00000 n \n", gl2ps->xreflist[i]); |
---|
| 4760 | |
---|
| 4761 | fprintf(gl2ps->stream, |
---|
| 4762 | "trailer\n" |
---|
| 4763 | "<<\n" |
---|
| 4764 | "/Size %d\n" |
---|
| 4765 | "/Info 1 0 R\n" |
---|
| 4766 | "/Root 2 0 R\n" |
---|
| 4767 | ">>\n" |
---|
| 4768 | "startxref\n%d\n" |
---|
| 4769 | "%%%%EOF\n", |
---|
| 4770 | gl2ps->objects_stack, gl2ps->xreflist[gl2ps->objects_stack]); |
---|
| 4771 | |
---|
| 4772 | /* Free auxiliary lists and arrays */ |
---|
| 4773 | gl2psFree(gl2ps->xreflist); |
---|
| 4774 | gl2psListAction(gl2ps->pdfprimlist, gl2psFreePrimitive); |
---|
| 4775 | gl2psListDelete(gl2ps->pdfprimlist); |
---|
| 4776 | gl2psPDFgroupListDelete(); |
---|
| 4777 | |
---|
| 4778 | #if defined(GL2PS_HAVE_ZLIB) |
---|
| 4779 | if(gl2ps->options & GL2PS_COMPRESS){ |
---|
| 4780 | gl2psFreeCompress(); |
---|
| 4781 | gl2psFree(gl2ps->compress); |
---|
| 4782 | gl2ps->compress = NULL; |
---|
| 4783 | } |
---|
| 4784 | #endif |
---|
| 4785 | } |
---|
| 4786 | |
---|
| 4787 | /* PDF begin viewport */ |
---|
| 4788 | |
---|
| 4789 | static void gl2psPrintPDFBeginViewport(GLint viewport[4]) |
---|
| 4790 | { |
---|
| 4791 | int offs = 0; |
---|
| 4792 | GLint index; |
---|
| 4793 | GLfloat rgba[4]; |
---|
| 4794 | int x = viewport[0], y = viewport[1], w = viewport[2], h = viewport[3]; |
---|
| 4795 | |
---|
| 4796 | glRenderMode(GL_FEEDBACK); |
---|
| 4797 | |
---|
| 4798 | if(gl2ps->header){ |
---|
| 4799 | gl2psPrintPDFHeader(); |
---|
| 4800 | gl2ps->header = GL_FALSE; |
---|
| 4801 | } |
---|
| 4802 | |
---|
| 4803 | offs += gl2psPrintf("q\n"); |
---|
| 4804 | |
---|
| 4805 | if(gl2ps->options & GL2PS_DRAW_BACKGROUND){ |
---|
| 4806 | if(gl2ps->colormode == GL_RGBA || gl2ps->colorsize == 0){ |
---|
| 4807 | glGetFloatv(GL_COLOR_CLEAR_VALUE, rgba); |
---|
| 4808 | } |
---|
| 4809 | else{ |
---|
| 4810 | glGetIntegerv(GL_INDEX_CLEAR_VALUE, &index); |
---|
| 4811 | rgba[0] = gl2ps->colormap[index][0]; |
---|
| 4812 | rgba[1] = gl2ps->colormap[index][1]; |
---|
| 4813 | rgba[2] = gl2ps->colormap[index][2]; |
---|
| 4814 | rgba[3] = 1.0F; |
---|
| 4815 | } |
---|
| 4816 | offs += gl2psPrintPDFFillColor(rgba); |
---|
| 4817 | offs += gl2psPrintf("%d %d %d %d re\n" |
---|
| 4818 | "W\n" |
---|
| 4819 | "f\n", |
---|
| 4820 | x, y, w, h); |
---|
| 4821 | } |
---|
| 4822 | else{ |
---|
| 4823 | offs += gl2psPrintf("%d %d %d %d re\n" |
---|
| 4824 | "W\n" |
---|
| 4825 | "n\n", |
---|
| 4826 | x, y, w, h); |
---|
| 4827 | } |
---|
| 4828 | |
---|
| 4829 | gl2ps->streamlength += offs; |
---|
| 4830 | } |
---|
| 4831 | |
---|
| 4832 | static GLint gl2psPrintPDFEndViewport(void) |
---|
| 4833 | { |
---|
| 4834 | GLint res; |
---|
| 4835 | |
---|
| 4836 | res = gl2psPrintPrimitives(); |
---|
| 4837 | gl2ps->streamlength += gl2psPrintf("Q\n"); |
---|
| 4838 | return res; |
---|
| 4839 | } |
---|
| 4840 | |
---|
| 4841 | static void gl2psPrintPDFFinalPrimitive(void) |
---|
| 4842 | { |
---|
| 4843 | } |
---|
| 4844 | |
---|
| 4845 | /* definition of the PDF backend */ |
---|
| 4846 | |
---|
| 4847 | static GL2PSbackend gl2psPDF = { |
---|
| 4848 | gl2psPrintPDFHeader, |
---|
| 4849 | gl2psPrintPDFFooter, |
---|
| 4850 | gl2psPrintPDFBeginViewport, |
---|
| 4851 | gl2psPrintPDFEndViewport, |
---|
| 4852 | gl2psPrintPDFPrimitive, |
---|
| 4853 | gl2psPrintPDFFinalPrimitive, |
---|
| 4854 | "pdf", |
---|
| 4855 | "Portable Document Format" |
---|
| 4856 | }; |
---|
| 4857 | |
---|
| 4858 | /********************************************************************* |
---|
| 4859 | * |
---|
| 4860 | * SVG routines |
---|
| 4861 | * |
---|
| 4862 | *********************************************************************/ |
---|
| 4863 | |
---|
| 4864 | static void gl2psSVGGetCoordsAndColors(int n, GL2PSvertex *verts, |
---|
| 4865 | GL2PSxyz *xyz, GL2PSrgba *rgba) |
---|
| 4866 | { |
---|
| 4867 | int i, j; |
---|
| 4868 | |
---|
| 4869 | for(i = 0; i < n; i++){ |
---|
| 4870 | xyz[i][0] = verts[i].xyz[0]; |
---|
| 4871 | xyz[i][1] = gl2ps->viewport[3] - verts[i].xyz[1]; |
---|
| 4872 | xyz[i][2] = 0.0F; |
---|
| 4873 | for(j = 0; j < 4; j++) |
---|
| 4874 | rgba[i][j] = verts[i].rgba[j]; |
---|
| 4875 | } |
---|
| 4876 | } |
---|
| 4877 | |
---|
| 4878 | static void gl2psSVGGetColorString(GL2PSrgba rgba, char str[32]) |
---|
| 4879 | { |
---|
| 4880 | int r = (int)(255. * rgba[0]); |
---|
| 4881 | int g = (int)(255. * rgba[1]); |
---|
| 4882 | int b = (int)(255. * rgba[2]); |
---|
| 4883 | int rc = (r < 0) ? 0 : (r > 255) ? 255 : r; |
---|
| 4884 | int gc = (g < 0) ? 0 : (g > 255) ? 255 : g; |
---|
| 4885 | int bc = (b < 0) ? 0 : (b > 255) ? 255 : b; |
---|
| 4886 | sprintf(str, "#%2.2x%2.2x%2.2x", rc, gc, bc); |
---|
| 4887 | } |
---|
| 4888 | |
---|
| 4889 | static void gl2psPrintSVGHeader(void) |
---|
| 4890 | { |
---|
| 4891 | int x, y, width, height; |
---|
| 4892 | char col[32]; |
---|
| 4893 | time_t now; |
---|
| 4894 | |
---|
| 4895 | time(&now); |
---|
| 4896 | |
---|
| 4897 | if (gl2ps->options & GL2PS_LANDSCAPE){ |
---|
| 4898 | x = (int)gl2ps->viewport[1]; |
---|
| 4899 | y = (int)gl2ps->viewport[0]; |
---|
| 4900 | width = (int)gl2ps->viewport[3]; |
---|
| 4901 | height = (int)gl2ps->viewport[2]; |
---|
| 4902 | } |
---|
| 4903 | else{ |
---|
| 4904 | x = (int)gl2ps->viewport[0]; |
---|
| 4905 | y = (int)gl2ps->viewport[1]; |
---|
| 4906 | width = (int)gl2ps->viewport[2]; |
---|
| 4907 | height = (int)gl2ps->viewport[3]; |
---|
| 4908 | } |
---|
| 4909 | |
---|
| 4910 | /* Compressed SVG files (.svgz) are simply gzipped SVG files */ |
---|
| 4911 | gl2psPrintGzipHeader(); |
---|
| 4912 | |
---|
| 4913 | gl2psPrintf("<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?>\n"); |
---|
| 4914 | gl2psPrintf("<svg xmlns=\"http://www.w3.org/2000/svg\"\n"); |
---|
| 4915 | gl2psPrintf(" xmlns:xlink=\"http://www.w3.org/1999/xlink\"\n" |
---|
| 4916 | " width=\"%dpx\" height=\"%dpx\" viewBox=\"%d %d %d %d\">\n", |
---|
| 4917 | width, height, x, y, width, height); |
---|
| 4918 | gl2psPrintf("<title>%s</title>\n", gl2ps->title); |
---|
| 4919 | gl2psPrintf("<desc>\n"); |
---|
| 4920 | gl2psPrintf("Creator: GL2PS %d.%d.%d%s, %s\n" |
---|
| 4921 | "For: %s\n" |
---|
| 4922 | "CreationDate: %s", |
---|
| 4923 | GL2PS_MAJOR_VERSION, GL2PS_MINOR_VERSION, GL2PS_PATCH_VERSION, |
---|
| 4924 | GL2PS_EXTRA_VERSION, GL2PS_COPYRIGHT, gl2ps->producer, ctime(&now)); |
---|
| 4925 | gl2psPrintf("</desc>\n"); |
---|
| 4926 | gl2psPrintf("<defs>\n"); |
---|
| 4927 | gl2psPrintf("</defs>\n"); |
---|
| 4928 | |
---|
| 4929 | if(gl2ps->options & GL2PS_DRAW_BACKGROUND){ |
---|
| 4930 | gl2psSVGGetColorString(gl2ps->bgcolor, col); |
---|
| 4931 | gl2psPrintf("<polygon fill=\"%s\" points=\"%d,%d %d,%d %d,%d %d,%d\"/>\n", col, |
---|
| 4932 | (int)gl2ps->viewport[0], (int)gl2ps->viewport[1], |
---|
| 4933 | (int)gl2ps->viewport[2], (int)gl2ps->viewport[1], |
---|
| 4934 | (int)gl2ps->viewport[2], (int)gl2ps->viewport[3], |
---|
| 4935 | (int)gl2ps->viewport[0], (int)gl2ps->viewport[3]); |
---|
| 4936 | } |
---|
| 4937 | |
---|
| 4938 | /* group all the primitives and disable antialiasing */ |
---|
| 4939 | gl2psPrintf("<g shape-rendering=\"crispEdges\">\n"); |
---|
| 4940 | } |
---|
| 4941 | |
---|
| 4942 | static void gl2psPrintSVGSmoothTriangle(GL2PSxyz xyz[3], GL2PSrgba rgba[3]) |
---|
| 4943 | { |
---|
| 4944 | int i; |
---|
| 4945 | GL2PSxyz xyz2[3]; |
---|
| 4946 | GL2PSrgba rgba2[3]; |
---|
| 4947 | char col[32]; |
---|
| 4948 | |
---|
| 4949 | /* Apparently there is no easy way to do Gouraud shading in SVG |
---|
| 4950 | without explicitly pre-defining gradients, so for now we just do |
---|
| 4951 | recursive subdivision */ |
---|
| 4952 | |
---|
| 4953 | if(gl2psSameColorThreshold(3, rgba, gl2ps->threshold)){ |
---|
| 4954 | gl2psSVGGetColorString(rgba[0], col); |
---|
| 4955 | gl2psPrintf("<polygon fill=\"%s\" ", col); |
---|
| 4956 | if(rgba[0][3] < 1.0F) gl2psPrintf("fill-opacity=\"%g\" ", rgba[0][3]); |
---|
| 4957 | gl2psPrintf("points=\"%g,%g %g,%g %g,%g\"/>\n", xyz[0][0], xyz[0][1], |
---|
| 4958 | xyz[1][0], xyz[1][1], xyz[2][0], xyz[2][1]); |
---|
| 4959 | } |
---|
| 4960 | else{ |
---|
| 4961 | /* subdivide into 4 subtriangles */ |
---|
| 4962 | for(i = 0; i < 3; i++){ |
---|
| 4963 | xyz2[0][i] = xyz[0][i]; |
---|
| 4964 | xyz2[1][i] = 0.5 * (xyz[0][i] + xyz[1][i]); |
---|
| 4965 | xyz2[2][i] = 0.5 * (xyz[0][i] + xyz[2][i]); |
---|
| 4966 | } |
---|
| 4967 | for(i = 0; i < 4; i++){ |
---|
| 4968 | rgba2[0][i] = rgba[0][i]; |
---|
| 4969 | rgba2[1][i] = 0.5 * (rgba[0][i] + rgba[1][i]); |
---|
| 4970 | rgba2[2][i] = 0.5 * (rgba[0][i] + rgba[2][i]); |
---|
| 4971 | } |
---|
| 4972 | gl2psPrintSVGSmoothTriangle(xyz2, rgba2); |
---|
| 4973 | for(i = 0; i < 3; i++){ |
---|
| 4974 | xyz2[0][i] = 0.5 * (xyz[0][i] + xyz[1][i]); |
---|
| 4975 | xyz2[1][i] = xyz[1][i]; |
---|
| 4976 | xyz2[2][i] = 0.5 * (xyz[1][i] + xyz[2][i]); |
---|
| 4977 | } |
---|
| 4978 | for(i = 0; i < 4; i++){ |
---|
| 4979 | rgba2[0][i] = 0.5 * (rgba[0][i] + rgba[1][i]); |
---|
| 4980 | rgba2[1][i] = rgba[1][i]; |
---|
| 4981 | rgba2[2][i] = 0.5 * (rgba[1][i] + rgba[2][i]); |
---|
| 4982 | } |
---|
| 4983 | gl2psPrintSVGSmoothTriangle(xyz2, rgba2); |
---|
| 4984 | for(i = 0; i < 3; i++){ |
---|
| 4985 | xyz2[0][i] = 0.5 * (xyz[0][i] + xyz[2][i]); |
---|
| 4986 | xyz2[1][i] = xyz[2][i]; |
---|
| 4987 | xyz2[2][i] = 0.5 * (xyz[1][i] + xyz[2][i]); |
---|
| 4988 | } |
---|
| 4989 | for(i = 0; i < 4; i++){ |
---|
| 4990 | rgba2[0][i] = 0.5 * (rgba[0][i] + rgba[2][i]); |
---|
| 4991 | rgba2[1][i] = rgba[2][i]; |
---|
| 4992 | rgba2[2][i] = 0.5 * (rgba[1][i] + rgba[2][i]); |
---|
| 4993 | } |
---|
| 4994 | gl2psPrintSVGSmoothTriangle(xyz2, rgba2); |
---|
| 4995 | for(i = 0; i < 3; i++){ |
---|
| 4996 | xyz2[0][i] = 0.5 * (xyz[0][i] + xyz[1][i]); |
---|
| 4997 | xyz2[1][i] = 0.5 * (xyz[1][i] + xyz[2][i]); |
---|
| 4998 | xyz2[2][i] = 0.5 * (xyz[0][i] + xyz[2][i]); |
---|
| 4999 | } |
---|
| 5000 | for(i = 0; i < 4; i++){ |
---|
| 5001 | rgba2[0][i] = 0.5 * (rgba[0][i] + rgba[1][i]); |
---|
| 5002 | rgba2[1][i] = 0.5 * (rgba[1][i] + rgba[2][i]); |
---|
| 5003 | rgba2[2][i] = 0.5 * (rgba[0][i] + rgba[2][i]); |
---|
| 5004 | } |
---|
| 5005 | gl2psPrintSVGSmoothTriangle(xyz2, rgba2); |
---|
| 5006 | } |
---|
| 5007 | } |
---|
| 5008 | |
---|
| 5009 | static void gl2psPrintSVGDash(GLushort pattern, GLint factor) |
---|
| 5010 | { |
---|
| 5011 | int i, n, array[10]; |
---|
| 5012 | |
---|
| 5013 | if(!pattern || !factor) return; /* solid line */ |
---|
| 5014 | |
---|
| 5015 | gl2psParseStipplePattern(pattern, factor, &n, array); |
---|
| 5016 | gl2psPrintf("stroke-dasharray=\""); |
---|
| 5017 | for(i = 0; i < n; i++){ |
---|
| 5018 | if(i) gl2psPrintf(","); |
---|
| 5019 | gl2psPrintf("%d", array[i]); |
---|
| 5020 | } |
---|
| 5021 | gl2psPrintf("\" "); |
---|
| 5022 | } |
---|
| 5023 | |
---|
| 5024 | static void gl2psEndSVGLine(void) |
---|
| 5025 | { |
---|
| 5026 | int i; |
---|
| 5027 | if(gl2ps->lastvertex.rgba[0] >= 0.){ |
---|
| 5028 | gl2psPrintf("%g,%g\"/>\n", gl2ps->lastvertex.xyz[0], |
---|
| 5029 | gl2ps->viewport[3] - gl2ps->lastvertex.xyz[1]); |
---|
| 5030 | for(i = 0; i < 3; i++) |
---|
| 5031 | gl2ps->lastvertex.xyz[i] = -1.; |
---|
| 5032 | for(i = 0; i < 4; i++) |
---|
| 5033 | gl2ps->lastvertex.rgba[i] = -1.; |
---|
| 5034 | } |
---|
| 5035 | } |
---|
| 5036 | |
---|
| 5037 | #if defined(GL2PS_HAVE_LIBPNG) |
---|
| 5038 | static void gl2psPrintSVGPixmap(GLfloat x, GLfloat y, GL2PSimage *pixmap) |
---|
| 5039 | #else |
---|
| 5040 | static void gl2psPrintSVGPixmap(GLfloat, GLfloat, GL2PSimage *) |
---|
| 5041 | #endif |
---|
| 5042 | { |
---|
| 5043 | #if defined(GL2PS_HAVE_LIBPNG) |
---|
| 5044 | GL2PSlist *png; |
---|
| 5045 | unsigned char c; |
---|
| 5046 | int i; |
---|
| 5047 | |
---|
| 5048 | /* The only image types supported by the SVG standard are JPEG, PNG |
---|
| 5049 | and SVG. Here we choose PNG, and since we want to embed the image |
---|
| 5050 | directly in the SVG stream (and not link to an external image |
---|
| 5051 | file), we need to encode the pixmap into PNG in memory, then |
---|
| 5052 | encode it into base64. */ |
---|
| 5053 | |
---|
| 5054 | png = gl2psListCreate(pixmap->width * pixmap->height * 3, 1000, |
---|
| 5055 | sizeof(unsigned char)); |
---|
| 5056 | gl2psConvertPixmapToPNG(pixmap, png); |
---|
| 5057 | gl2psListEncodeBase64(png); |
---|
| 5058 | gl2psPrintf("<image x=\"%g\" y=\"%g\" width=\"%d\" height=\"%d\"\n", |
---|
| 5059 | x, y - pixmap->height, pixmap->width, pixmap->height); |
---|
| 5060 | gl2psPrintf("xlink:href=\"data:image/png;base64,"); |
---|
| 5061 | for(i = 0; i < gl2psListNbr(png); i++){ |
---|
| 5062 | gl2psListRead(png, i, &c); |
---|
| 5063 | gl2psPrintf("%c", c); |
---|
| 5064 | } |
---|
| 5065 | gl2psPrintf("\"/>\n"); |
---|
| 5066 | gl2psListDelete(png); |
---|
| 5067 | #else |
---|
| 5068 | gl2psMsg(GL2PS_WARNING, "GL2PS has to be compiled with PNG support in " |
---|
| 5069 | "order to embed images in SVG streams"); |
---|
| 5070 | #endif |
---|
| 5071 | } |
---|
| 5072 | |
---|
| 5073 | static void gl2psPrintSVGPrimitive(void *data) |
---|
| 5074 | { |
---|
| 5075 | GL2PSprimitive *prim; |
---|
| 5076 | GL2PSxyz xyz[4]; |
---|
| 5077 | GL2PSrgba rgba[4]; |
---|
| 5078 | char col[32]; |
---|
| 5079 | int newline; |
---|
| 5080 | |
---|
| 5081 | prim = *(GL2PSprimitive**)data; |
---|
| 5082 | |
---|
| 5083 | if((gl2ps->options & GL2PS_OCCLUSION_CULL) && prim->culled) return; |
---|
| 5084 | |
---|
| 5085 | /* We try to draw connected lines as a single path to get nice line |
---|
| 5086 | joins and correct stippling. So if the primitive to print is not |
---|
| 5087 | a line we must first finish the current line (if any): */ |
---|
| 5088 | if(prim->type != GL2PS_LINE) gl2psEndSVGLine(); |
---|
| 5089 | |
---|
| 5090 | gl2psSVGGetCoordsAndColors(prim->numverts, prim->verts, xyz, rgba); |
---|
| 5091 | |
---|
| 5092 | switch(prim->type){ |
---|
| 5093 | case GL2PS_POINT : |
---|
| 5094 | gl2psSVGGetColorString(rgba[0], col); |
---|
| 5095 | gl2psPrintf("<circle fill=\"%s\" ", col); |
---|
| 5096 | if(rgba[0][3] < 1.0F) gl2psPrintf("fill-opacity=\"%g\" ", rgba[0][3]); |
---|
| 5097 | gl2psPrintf("cx=\"%g\" cy=\"%g\" r=\"%g\"/>\n", |
---|
| 5098 | xyz[0][0], xyz[0][1], 0.5 * prim->width); |
---|
| 5099 | break; |
---|
| 5100 | case GL2PS_LINE : |
---|
| 5101 | if(!gl2psSamePosition(gl2ps->lastvertex.xyz, prim->verts[0].xyz) || |
---|
| 5102 | !gl2psSameColor(gl2ps->lastrgba, prim->verts[0].rgba) || |
---|
| 5103 | gl2ps->lastlinewidth != prim->width || |
---|
| 5104 | gl2ps->lastpattern != prim->pattern || |
---|
| 5105 | gl2ps->lastfactor != prim->factor){ |
---|
| 5106 | /* End the current line if the new segment does not start where |
---|
| 5107 | the last one ended, or if the color, the width or the |
---|
| 5108 | stippling have changed (we will need to use multi-point |
---|
| 5109 | gradients for smooth-shaded lines) */ |
---|
| 5110 | gl2psEndSVGLine(); |
---|
| 5111 | newline = 1; |
---|
| 5112 | } |
---|
| 5113 | else{ |
---|
| 5114 | newline = 0; |
---|
| 5115 | } |
---|
| 5116 | gl2ps->lastvertex = prim->verts[1]; |
---|
| 5117 | gl2psSetLastColor(prim->verts[0].rgba); |
---|
| 5118 | gl2ps->lastlinewidth = prim->width; |
---|
| 5119 | gl2ps->lastpattern = prim->pattern; |
---|
| 5120 | gl2ps->lastfactor = prim->factor; |
---|
| 5121 | if(newline){ |
---|
| 5122 | gl2psSVGGetColorString(rgba[0], col); |
---|
| 5123 | gl2psPrintf("<polyline fill=\"none\" stroke=\"%s\" stroke-width=\"%g\" ", |
---|
| 5124 | col, prim->width); |
---|
| 5125 | if(rgba[0][3] < 1.0F) gl2psPrintf("stroke-opacity=\"%g\" ", rgba[0][3]); |
---|
| 5126 | gl2psPrintSVGDash(prim->pattern, prim->factor); |
---|
| 5127 | gl2psPrintf("points=\"%g,%g ", xyz[0][0], xyz[0][1]); |
---|
| 5128 | } |
---|
| 5129 | else{ |
---|
| 5130 | gl2psPrintf("%g,%g ", xyz[0][0], xyz[0][1]); |
---|
| 5131 | } |
---|
| 5132 | break; |
---|
| 5133 | case GL2PS_TRIANGLE : |
---|
| 5134 | gl2psPrintSVGSmoothTriangle(xyz, rgba); |
---|
| 5135 | break; |
---|
| 5136 | case GL2PS_QUADRANGLE : |
---|
| 5137 | gl2psMsg(GL2PS_WARNING, "There should not be any quad left to print"); |
---|
| 5138 | break; |
---|
| 5139 | case GL2PS_PIXMAP : |
---|
| 5140 | gl2psPrintSVGPixmap(xyz[0][0], xyz[0][1], prim->data.image); |
---|
| 5141 | break; |
---|
| 5142 | case GL2PS_TEXT : |
---|
| 5143 | gl2psSVGGetColorString(prim->verts[0].rgba, col); |
---|
| 5144 | gl2psPrintf("<text fill=\"%s\" x=\"%g\" y=\"%g\" font-size=\"%d\" ", |
---|
| 5145 | col, xyz[0][0], xyz[0][1], prim->data.text->fontsize); |
---|
| 5146 | if(!strcmp(prim->data.text->fontname, "Times-Roman")) |
---|
| 5147 | gl2psPrintf("font-family=\"Times\">"); |
---|
| 5148 | else if(!strcmp(prim->data.text->fontname, "Times-Bold")) |
---|
| 5149 | gl2psPrintf("font-family=\"Times\" font-weight=\"bold\">"); |
---|
| 5150 | else if(!strcmp(prim->data.text->fontname, "Times-Italic")) |
---|
| 5151 | gl2psPrintf("font-family=\"Times\" font-style=\"italic\">"); |
---|
| 5152 | else if(!strcmp(prim->data.text->fontname, "Times-BoldItalic")) |
---|
| 5153 | gl2psPrintf("font-family=\"Times\" font-style=\"italic\" font-weight=\"bold\">"); |
---|
| 5154 | else if(!strcmp(prim->data.text->fontname, "Helvetica-Bold")) |
---|
| 5155 | gl2psPrintf("font-family=\"Helvetica\" font-weight=\"bold\">"); |
---|
| 5156 | else if(!strcmp(prim->data.text->fontname, "Helvetica-Oblique")) |
---|
| 5157 | gl2psPrintf("font-family=\"Helvetica\" font-style=\"oblique\">"); |
---|
| 5158 | else if(!strcmp(prim->data.text->fontname, "Helvetica-BoldOblique")) |
---|
| 5159 | gl2psPrintf("font-family=\"Helvetica\" font-style=\"oblique\" font-weight=\"bold\">"); |
---|
| 5160 | else if(!strcmp(prim->data.text->fontname, "Courier-Bold")) |
---|
| 5161 | gl2psPrintf("font-family=\"Courier\" font-weight=\"bold\">"); |
---|
| 5162 | else if(!strcmp(prim->data.text->fontname, "Courier-Oblique")) |
---|
| 5163 | gl2psPrintf("font-family=\"Courier\" font-style=\"oblique\">"); |
---|
| 5164 | else if(!strcmp(prim->data.text->fontname, "Courier-BoldOblique")) |
---|
| 5165 | gl2psPrintf("font-family=\"Courier\" font-style=\"oblique\" font-weight=\"bold\">"); |
---|
| 5166 | else |
---|
| 5167 | gl2psPrintf("font-family=\"%s\">", prim->data.text->fontname); |
---|
| 5168 | gl2psPrintf("%s</text>\n", prim->data.text->str); |
---|
| 5169 | break; |
---|
| 5170 | case GL2PS_SPECIAL : |
---|
| 5171 | /* alignment contains the format for which the special output text |
---|
| 5172 | is intended */ |
---|
| 5173 | if(prim->data.text->alignment == GL2PS_SVG) |
---|
| 5174 | gl2psPrintf("%s\n", prim->data.text->str); |
---|
| 5175 | break; |
---|
| 5176 | default : |
---|
| 5177 | break; |
---|
| 5178 | } |
---|
| 5179 | } |
---|
| 5180 | |
---|
| 5181 | static void gl2psPrintSVGFooter(void) |
---|
| 5182 | { |
---|
| 5183 | gl2psPrintf("</g>\n"); |
---|
| 5184 | gl2psPrintf("</svg>\n"); |
---|
| 5185 | |
---|
| 5186 | gl2psPrintGzipFooter(); |
---|
| 5187 | } |
---|
| 5188 | |
---|
| 5189 | static void gl2psPrintSVGBeginViewport(GLint viewport[4]) |
---|
| 5190 | { |
---|
| 5191 | GLint index; |
---|
| 5192 | char col[32]; |
---|
| 5193 | GLfloat rgba[4]; |
---|
| 5194 | int x = viewport[0], y = viewport[1], w = viewport[2], h = viewport[3]; |
---|
| 5195 | |
---|
| 5196 | glRenderMode(GL_FEEDBACK); |
---|
| 5197 | |
---|
| 5198 | if(gl2ps->header){ |
---|
| 5199 | gl2psPrintSVGHeader(); |
---|
| 5200 | gl2ps->header = GL_FALSE; |
---|
| 5201 | } |
---|
| 5202 | |
---|
| 5203 | if(gl2ps->options & GL2PS_DRAW_BACKGROUND){ |
---|
| 5204 | if(gl2ps->colormode == GL_RGBA || gl2ps->colorsize == 0){ |
---|
| 5205 | glGetFloatv(GL_COLOR_CLEAR_VALUE, rgba); |
---|
| 5206 | } |
---|
| 5207 | else{ |
---|
| 5208 | glGetIntegerv(GL_INDEX_CLEAR_VALUE, &index); |
---|
| 5209 | rgba[0] = gl2ps->colormap[index][0]; |
---|
| 5210 | rgba[1] = gl2ps->colormap[index][1]; |
---|
| 5211 | rgba[2] = gl2ps->colormap[index][2]; |
---|
| 5212 | rgba[3] = 1.0F; |
---|
| 5213 | } |
---|
| 5214 | gl2psSVGGetColorString(rgba, col); |
---|
| 5215 | gl2psPrintf("<polygon fill=\"%s\" points=\"%d,%d %d,%d %d,%d %d,%d\"/>\n", col, |
---|
| 5216 | x, gl2ps->viewport[3] - y, |
---|
| 5217 | x + w, gl2ps->viewport[3] - y, |
---|
| 5218 | x + w, gl2ps->viewport[3] - (y + h), |
---|
| 5219 | x, gl2ps->viewport[3] - (y + h)); |
---|
| 5220 | } |
---|
| 5221 | |
---|
| 5222 | gl2psPrintf("<clipPath id=\"cp%d%d%d%d\">\n", x, y, w, h); |
---|
| 5223 | gl2psPrintf(" <polygon points=\"%d,%d %d,%d %d,%d %d,%d\"/>\n", |
---|
| 5224 | x, gl2ps->viewport[3] - y, |
---|
| 5225 | x + w, gl2ps->viewport[3] - y, |
---|
| 5226 | x + w, gl2ps->viewport[3] - (y + h), |
---|
| 5227 | x, gl2ps->viewport[3] - (y + h)); |
---|
| 5228 | gl2psPrintf("</clipPath>\n"); |
---|
| 5229 | gl2psPrintf("<g clip-path=\"url(#cp%d%d%d%d)\">\n", x, y, w, h); |
---|
| 5230 | } |
---|
| 5231 | |
---|
| 5232 | static GLint gl2psPrintSVGEndViewport(void) |
---|
| 5233 | { |
---|
| 5234 | GLint res; |
---|
| 5235 | |
---|
| 5236 | res = gl2psPrintPrimitives(); |
---|
| 5237 | gl2psPrintf("</g>\n"); |
---|
| 5238 | return res; |
---|
| 5239 | } |
---|
| 5240 | |
---|
| 5241 | static void gl2psPrintSVGFinalPrimitive(void) |
---|
| 5242 | { |
---|
| 5243 | /* End any remaining line, if any */ |
---|
| 5244 | gl2psEndSVGLine(); |
---|
| 5245 | } |
---|
| 5246 | |
---|
| 5247 | /* definition of the SVG backend */ |
---|
| 5248 | |
---|
| 5249 | static GL2PSbackend gl2psSVG = { |
---|
| 5250 | gl2psPrintSVGHeader, |
---|
| 5251 | gl2psPrintSVGFooter, |
---|
| 5252 | gl2psPrintSVGBeginViewport, |
---|
| 5253 | gl2psPrintSVGEndViewport, |
---|
| 5254 | gl2psPrintSVGPrimitive, |
---|
| 5255 | gl2psPrintSVGFinalPrimitive, |
---|
| 5256 | "svg", |
---|
| 5257 | "Scalable Vector Graphics" |
---|
| 5258 | }; |
---|
| 5259 | |
---|
| 5260 | /********************************************************************* |
---|
| 5261 | * |
---|
| 5262 | * PGF routines |
---|
| 5263 | * |
---|
| 5264 | *********************************************************************/ |
---|
| 5265 | |
---|
| 5266 | static void gl2psPrintPGFColor(GL2PSrgba rgba) |
---|
| 5267 | { |
---|
| 5268 | if(!gl2psSameColor(gl2ps->lastrgba, rgba)){ |
---|
| 5269 | gl2psSetLastColor(rgba); |
---|
| 5270 | fprintf(gl2ps->stream, "\\color[rgb]{%f,%f,%f}\n", rgba[0], rgba[1], rgba[2]); |
---|
| 5271 | } |
---|
| 5272 | } |
---|
| 5273 | |
---|
| 5274 | static void gl2psPrintPGFHeader(void) |
---|
| 5275 | { |
---|
| 5276 | time_t now; |
---|
| 5277 | |
---|
| 5278 | time(&now); |
---|
| 5279 | |
---|
| 5280 | fprintf(gl2ps->stream, |
---|
| 5281 | "%% Title: %s\n" |
---|
| 5282 | "%% Creator: GL2PS %d.%d.%d%s, %s\n" |
---|
| 5283 | "%% For: %s\n" |
---|
| 5284 | "%% CreationDate: %s", |
---|
| 5285 | gl2ps->title, GL2PS_MAJOR_VERSION, GL2PS_MINOR_VERSION, |
---|
| 5286 | GL2PS_PATCH_VERSION, GL2PS_EXTRA_VERSION, GL2PS_COPYRIGHT, |
---|
| 5287 | gl2ps->producer, ctime(&now)); |
---|
| 5288 | |
---|
| 5289 | fprintf(gl2ps->stream, "\\begin{pgfpicture}\n"); |
---|
| 5290 | if(gl2ps->options & GL2PS_DRAW_BACKGROUND){ |
---|
| 5291 | gl2psPrintPGFColor(gl2ps->bgcolor); |
---|
| 5292 | fprintf(gl2ps->stream, |
---|
| 5293 | "\\pgfpathrectanglecorners{" |
---|
| 5294 | "\\pgfpoint{%dpt}{%dpt}}{\\pgfpoint{%dpt}{%dpt}}\n" |
---|
| 5295 | "\\pgfusepath{fill}\n", |
---|
| 5296 | (int)gl2ps->viewport[0], (int)gl2ps->viewport[1], |
---|
| 5297 | (int)gl2ps->viewport[2], (int)gl2ps->viewport[3]); |
---|
| 5298 | } |
---|
| 5299 | } |
---|
| 5300 | |
---|
| 5301 | static void gl2psPrintPGFDash(GLushort pattern, GLint factor) |
---|
| 5302 | { |
---|
| 5303 | int i, n, array[10]; |
---|
| 5304 | |
---|
| 5305 | if(pattern == gl2ps->lastpattern && factor == gl2ps->lastfactor) |
---|
| 5306 | return; |
---|
| 5307 | |
---|
| 5308 | gl2ps->lastpattern = pattern; |
---|
| 5309 | gl2ps->lastfactor = factor; |
---|
| 5310 | |
---|
| 5311 | if(!pattern || !factor){ |
---|
| 5312 | /* solid line */ |
---|
| 5313 | fprintf(gl2ps->stream, "\\pgfsetdash{}{0pt}\n"); |
---|
| 5314 | } |
---|
| 5315 | else{ |
---|
| 5316 | gl2psParseStipplePattern(pattern, factor, &n, array); |
---|
| 5317 | fprintf(gl2ps->stream, "\\pgfsetdash{"); |
---|
| 5318 | for(i = 0; i < n; i++) fprintf(gl2ps->stream, "{%dpt}", array[i]); |
---|
| 5319 | fprintf(gl2ps->stream, "}{0pt}\n"); |
---|
| 5320 | } |
---|
| 5321 | } |
---|
| 5322 | |
---|
| 5323 | static const char *gl2psPGFTextAlignment(int align) |
---|
| 5324 | { |
---|
| 5325 | switch(align){ |
---|
| 5326 | case GL2PS_TEXT_C : return "center"; |
---|
| 5327 | case GL2PS_TEXT_CL : return "west"; |
---|
| 5328 | case GL2PS_TEXT_CR : return "east"; |
---|
| 5329 | case GL2PS_TEXT_B : return "south"; |
---|
| 5330 | case GL2PS_TEXT_BR : return "south east"; |
---|
| 5331 | case GL2PS_TEXT_T : return "north"; |
---|
| 5332 | case GL2PS_TEXT_TL : return "north west"; |
---|
| 5333 | case GL2PS_TEXT_TR : return "north east"; |
---|
| 5334 | case GL2PS_TEXT_BL : |
---|
| 5335 | default : return "south west"; |
---|
| 5336 | } |
---|
| 5337 | } |
---|
| 5338 | |
---|
| 5339 | static void gl2psPrintPGFPrimitive(void *data) |
---|
| 5340 | { |
---|
| 5341 | GL2PSprimitive *prim; |
---|
| 5342 | |
---|
| 5343 | prim = *(GL2PSprimitive**)data; |
---|
| 5344 | |
---|
| 5345 | switch(prim->type){ |
---|
| 5346 | case GL2PS_POINT : |
---|
| 5347 | /* Points in openGL are rectangular */ |
---|
| 5348 | gl2psPrintPGFColor(prim->verts[0].rgba); |
---|
| 5349 | fprintf(gl2ps->stream, |
---|
| 5350 | "\\pgfpathrectangle{\\pgfpoint{%fpt}{%fpt}}" |
---|
| 5351 | "{\\pgfpoint{%fpt}{%fpt}}\n\\pgfusepath{fill}\n", |
---|
| 5352 | prim->verts[0].xyz[0]-0.5*prim->width, |
---|
| 5353 | prim->verts[0].xyz[1]-0.5*prim->width, |
---|
| 5354 | prim->width,prim->width); |
---|
| 5355 | break; |
---|
| 5356 | case GL2PS_LINE : |
---|
| 5357 | gl2psPrintPGFColor(prim->verts[0].rgba); |
---|
| 5358 | if(gl2ps->lastlinewidth != prim->width){ |
---|
| 5359 | gl2ps->lastlinewidth = prim->width; |
---|
| 5360 | fprintf(gl2ps->stream, "\\pgfsetlinewidth{%fpt}\n", gl2ps->lastlinewidth); |
---|
| 5361 | } |
---|
| 5362 | gl2psPrintPGFDash(prim->pattern, prim->factor); |
---|
| 5363 | fprintf(gl2ps->stream, |
---|
| 5364 | "\\pgfpathmoveto{\\pgfpoint{%fpt}{%fpt}}\n" |
---|
| 5365 | "\\pgflineto{\\pgfpoint{%fpt}{%fpt}}\n" |
---|
| 5366 | "\\pgfusepath{stroke}\n", |
---|
| 5367 | prim->verts[1].xyz[0], prim->verts[1].xyz[1], |
---|
| 5368 | prim->verts[0].xyz[0], prim->verts[0].xyz[1]); |
---|
| 5369 | break; |
---|
| 5370 | case GL2PS_TRIANGLE : |
---|
| 5371 | if(gl2ps->lastlinewidth != 0){ |
---|
| 5372 | gl2ps->lastlinewidth = 0; |
---|
| 5373 | fprintf(gl2ps->stream, "\\pgfsetlinewidth{0.01pt}\n"); |
---|
| 5374 | } |
---|
| 5375 | gl2psPrintPGFColor(prim->verts[0].rgba); |
---|
| 5376 | fprintf(gl2ps->stream, |
---|
| 5377 | "\\pgfpathmoveto{\\pgfpoint{%fpt}{%fpt}}\n" |
---|
| 5378 | "\\pgflineto{\\pgfpoint{%fpt}{%fpt}}\n" |
---|
| 5379 | "\\pgflineto{\\pgfpoint{%fpt}{%fpt}}\n" |
---|
| 5380 | "\\pgfpathclose\n" |
---|
| 5381 | "\\pgfusepath{fill,stroke}\n", |
---|
| 5382 | prim->verts[2].xyz[0], prim->verts[2].xyz[1], |
---|
| 5383 | prim->verts[1].xyz[0], prim->verts[1].xyz[1], |
---|
| 5384 | prim->verts[0].xyz[0], prim->verts[0].xyz[1]); |
---|
| 5385 | break; |
---|
| 5386 | case GL2PS_TEXT : |
---|
| 5387 | fprintf(gl2ps->stream, "{\n\\pgftransformshift{\\pgfpoint{%fpt}{%fpt}}\n", |
---|
| 5388 | prim->verts[0].xyz[0], prim->verts[0].xyz[1]); |
---|
| 5389 | |
---|
| 5390 | if(prim->data.text->angle) |
---|
| 5391 | fprintf(gl2ps->stream, "\\pgftransformrotate{%f}{", prim->data.text->angle); |
---|
| 5392 | |
---|
| 5393 | fprintf(gl2ps->stream, "\\pgfnode{rectangle}{%s}{\\fontsize{%d}{0}\\selectfont", |
---|
| 5394 | gl2psPGFTextAlignment(prim->data.text->alignment), |
---|
| 5395 | prim->data.text->fontsize); |
---|
| 5396 | |
---|
| 5397 | fprintf(gl2ps->stream, "\\textcolor[rgb]{%g,%g,%g}{{%s}}", |
---|
| 5398 | prim->verts[0].rgba[0], prim->verts[0].rgba[1], |
---|
| 5399 | prim->verts[0].rgba[2], prim->data.text->str); |
---|
| 5400 | |
---|
| 5401 | fprintf(gl2ps->stream, "}{}{\\pgfusepath{discard}}}\n"); |
---|
| 5402 | break; |
---|
| 5403 | case GL2PS_SPECIAL : |
---|
| 5404 | /* alignment contains the format for which the special output text |
---|
| 5405 | is intended */ |
---|
| 5406 | if (prim->data.text->alignment == GL2PS_PGF) |
---|
| 5407 | fprintf(gl2ps->stream, "%s\n", prim->data.text->str); |
---|
| 5408 | break; |
---|
| 5409 | default : |
---|
| 5410 | break; |
---|
| 5411 | } |
---|
| 5412 | } |
---|
| 5413 | |
---|
| 5414 | static void gl2psPrintPGFFooter(void) |
---|
| 5415 | { |
---|
| 5416 | fprintf(gl2ps->stream, "\\end{pgfpicture}\n"); |
---|
| 5417 | } |
---|
| 5418 | |
---|
| 5419 | static void gl2psPrintPGFBeginViewport(GLint viewport[4]) |
---|
| 5420 | { |
---|
| 5421 | GLint index; |
---|
| 5422 | GLfloat rgba[4]; |
---|
| 5423 | int x = viewport[0], y = viewport[1], w = viewport[2], h = viewport[3]; |
---|
| 5424 | |
---|
| 5425 | glRenderMode(GL_FEEDBACK); |
---|
| 5426 | |
---|
| 5427 | if(gl2ps->header){ |
---|
| 5428 | gl2psPrintPGFHeader(); |
---|
| 5429 | gl2ps->header = GL_FALSE; |
---|
| 5430 | } |
---|
| 5431 | |
---|
| 5432 | fprintf(gl2ps->stream, "\\begin{pgfscope}\n"); |
---|
| 5433 | if(gl2ps->options & GL2PS_DRAW_BACKGROUND){ |
---|
| 5434 | if(gl2ps->colormode == GL_RGBA || gl2ps->colorsize == 0){ |
---|
| 5435 | glGetFloatv(GL_COLOR_CLEAR_VALUE, rgba); |
---|
| 5436 | } |
---|
| 5437 | else{ |
---|
| 5438 | glGetIntegerv(GL_INDEX_CLEAR_VALUE, &index); |
---|
| 5439 | rgba[0] = gl2ps->colormap[index][0]; |
---|
| 5440 | rgba[1] = gl2ps->colormap[index][1]; |
---|
| 5441 | rgba[2] = gl2ps->colormap[index][2]; |
---|
| 5442 | rgba[3] = 1.0F; |
---|
| 5443 | } |
---|
| 5444 | gl2psPrintPGFColor(rgba); |
---|
| 5445 | fprintf(gl2ps->stream, |
---|
| 5446 | "\\pgfpathrectangle{\\pgfpoint{%dpt}{%dpt}}" |
---|
| 5447 | "{\\pgfpoint{%dpt}{%dpt}}\n" |
---|
| 5448 | "\\pgfusepath{fill}\n", |
---|
| 5449 | x, y, w, h); |
---|
| 5450 | } |
---|
| 5451 | |
---|
| 5452 | fprintf(gl2ps->stream, |
---|
| 5453 | "\\pgfpathrectangle{\\pgfpoint{%dpt}{%dpt}}" |
---|
| 5454 | "{\\pgfpoint{%dpt}{%dpt}}\n" |
---|
| 5455 | "\\pgfusepath{clip}\n", |
---|
| 5456 | x, y, w, h); |
---|
| 5457 | } |
---|
| 5458 | |
---|
| 5459 | static GLint gl2psPrintPGFEndViewport(void) |
---|
| 5460 | { |
---|
| 5461 | GLint res; |
---|
| 5462 | res = gl2psPrintPrimitives(); |
---|
| 5463 | fprintf(gl2ps->stream, "\\end{pgfscope}\n"); |
---|
| 5464 | return res; |
---|
| 5465 | } |
---|
| 5466 | |
---|
| 5467 | static void gl2psPrintPGFFinalPrimitive(void) |
---|
| 5468 | { |
---|
| 5469 | } |
---|
| 5470 | |
---|
| 5471 | /* definition of the PGF backend */ |
---|
| 5472 | |
---|
| 5473 | static GL2PSbackend gl2psPGF = { |
---|
| 5474 | gl2psPrintPGFHeader, |
---|
| 5475 | gl2psPrintPGFFooter, |
---|
| 5476 | gl2psPrintPGFBeginViewport, |
---|
| 5477 | gl2psPrintPGFEndViewport, |
---|
| 5478 | gl2psPrintPGFPrimitive, |
---|
| 5479 | gl2psPrintPGFFinalPrimitive, |
---|
| 5480 | "tex", |
---|
| 5481 | "PGF Latex Graphics" |
---|
| 5482 | }; |
---|
| 5483 | |
---|
| 5484 | /********************************************************************* |
---|
| 5485 | * |
---|
| 5486 | * General primitive printing routine |
---|
| 5487 | * |
---|
| 5488 | *********************************************************************/ |
---|
| 5489 | |
---|
| 5490 | /* Warning: the ordering of the backends must match the format |
---|
| 5491 | #defines in gl2ps.h */ |
---|
| 5492 | |
---|
| 5493 | static GL2PSbackend *gl2psbackends[] = { |
---|
| 5494 | &gl2psPS, /* 0 */ |
---|
| 5495 | &gl2psEPS, /* 1 */ |
---|
| 5496 | &gl2psTEX, /* 2 */ |
---|
| 5497 | &gl2psPDF, /* 3 */ |
---|
| 5498 | &gl2psSVG, /* 4 */ |
---|
| 5499 | &gl2psPGF /* 5 */ |
---|
| 5500 | }; |
---|
| 5501 | |
---|
| 5502 | static void gl2psComputeTightBoundingBox(void *data) |
---|
| 5503 | { |
---|
| 5504 | GL2PSprimitive *prim; |
---|
| 5505 | int i; |
---|
| 5506 | |
---|
| 5507 | prim = *(GL2PSprimitive**)data; |
---|
| 5508 | |
---|
| 5509 | for(i = 0; i < prim->numverts; i++){ |
---|
| 5510 | if(prim->verts[i].xyz[0] < gl2ps->viewport[0]) |
---|
| 5511 | gl2ps->viewport[0] = (GLint)prim->verts[i].xyz[0]; |
---|
| 5512 | if(prim->verts[i].xyz[0] > gl2ps->viewport[2]) |
---|
| 5513 | gl2ps->viewport[2] = (GLint)(prim->verts[i].xyz[0] + 0.5F); |
---|
| 5514 | if(prim->verts[i].xyz[1] < gl2ps->viewport[1]) |
---|
| 5515 | gl2ps->viewport[1] = (GLint)prim->verts[i].xyz[1]; |
---|
| 5516 | if(prim->verts[i].xyz[1] > gl2ps->viewport[3]) |
---|
| 5517 | gl2ps->viewport[3] = (GLint)(prim->verts[i].xyz[1] + 0.5F); |
---|
| 5518 | } |
---|
| 5519 | } |
---|
| 5520 | |
---|
| 5521 | static GLint gl2psPrintPrimitives(void) |
---|
| 5522 | { |
---|
| 5523 | GL2PSbsptree *root; |
---|
| 5524 | GL2PSxyz eye = {0.0F, 0.0F, 100.0F * GL2PS_ZSCALE}; |
---|
| 5525 | GLint used; |
---|
| 5526 | |
---|
| 5527 | used = glRenderMode(GL_RENDER); |
---|
| 5528 | |
---|
| 5529 | if(used < 0){ |
---|
| 5530 | gl2psMsg(GL2PS_INFO, "OpenGL feedback buffer overflow"); |
---|
| 5531 | return GL2PS_OVERFLOW; |
---|
| 5532 | } |
---|
| 5533 | |
---|
| 5534 | if(used > 0) |
---|
| 5535 | gl2psParseFeedbackBuffer(used); |
---|
| 5536 | |
---|
| 5537 | gl2psRescaleAndOffset(); |
---|
| 5538 | |
---|
| 5539 | if(gl2ps->header){ |
---|
| 5540 | if(gl2psListNbr(gl2ps->primitives) && |
---|
| 5541 | (gl2ps->options & GL2PS_TIGHT_BOUNDING_BOX)){ |
---|
| 5542 | gl2ps->viewport[0] = gl2ps->viewport[1] = 100000; |
---|
| 5543 | gl2ps->viewport[2] = gl2ps->viewport[3] = -100000; |
---|
| 5544 | gl2psListAction(gl2ps->primitives, gl2psComputeTightBoundingBox); |
---|
| 5545 | } |
---|
| 5546 | (gl2psbackends[gl2ps->format]->printHeader)(); |
---|
| 5547 | gl2ps->header = GL_FALSE; |
---|
| 5548 | } |
---|
| 5549 | |
---|
| 5550 | if(!gl2psListNbr(gl2ps->primitives)){ |
---|
| 5551 | /* empty feedback buffer and/or nothing else to print */ |
---|
| 5552 | return GL2PS_NO_FEEDBACK; |
---|
| 5553 | } |
---|
| 5554 | |
---|
| 5555 | switch(gl2ps->sort){ |
---|
| 5556 | case GL2PS_NO_SORT : |
---|
| 5557 | gl2psListAction(gl2ps->primitives, gl2psbackends[gl2ps->format]->printPrimitive); |
---|
| 5558 | gl2psListAction(gl2ps->primitives, gl2psFreePrimitive); |
---|
| 5559 | /* reset the primitive list, waiting for the next viewport */ |
---|
| 5560 | gl2psListReset(gl2ps->primitives); |
---|
| 5561 | break; |
---|
| 5562 | case GL2PS_SIMPLE_SORT : |
---|
| 5563 | gl2psListSort(gl2ps->primitives, gl2psCompareDepth); |
---|
| 5564 | if(gl2ps->options & GL2PS_OCCLUSION_CULL){ |
---|
| 5565 | gl2psListActionInverse(gl2ps->primitives, gl2psAddInImageTree); |
---|
| 5566 | gl2psFreeBspImageTree(&gl2ps->imagetree); |
---|
| 5567 | } |
---|
| 5568 | gl2psListAction(gl2ps->primitives, gl2psbackends[gl2ps->format]->printPrimitive); |
---|
| 5569 | gl2psListAction(gl2ps->primitives, gl2psFreePrimitive); |
---|
| 5570 | /* reset the primitive list, waiting for the next viewport */ |
---|
| 5571 | gl2psListReset(gl2ps->primitives); |
---|
| 5572 | break; |
---|
| 5573 | case GL2PS_BSP_SORT : |
---|
| 5574 | root = (GL2PSbsptree*)gl2psMalloc(sizeof(GL2PSbsptree)); |
---|
| 5575 | gl2psBuildBspTree(root, gl2ps->primitives); |
---|
| 5576 | if(GL_TRUE == gl2ps->boundary) gl2psBuildPolygonBoundary(root); |
---|
| 5577 | if(gl2ps->options & GL2PS_OCCLUSION_CULL){ |
---|
| 5578 | gl2psTraverseBspTree(root, eye, -GL2PS_EPSILON, gl2psLess, |
---|
| 5579 | gl2psAddInImageTree, 1); |
---|
| 5580 | gl2psFreeBspImageTree(&gl2ps->imagetree); |
---|
| 5581 | } |
---|
| 5582 | gl2psTraverseBspTree(root, eye, GL2PS_EPSILON, gl2psGreater, |
---|
| 5583 | gl2psbackends[gl2ps->format]->printPrimitive, 0); |
---|
| 5584 | gl2psFreeBspTree(&root); |
---|
| 5585 | /* reallocate the primitive list (it's been deleted by |
---|
| 5586 | gl2psBuildBspTree) in case there is another viewport */ |
---|
| 5587 | gl2ps->primitives = gl2psListCreate(500, 500, sizeof(GL2PSprimitive*)); |
---|
| 5588 | break; |
---|
| 5589 | } |
---|
| 5590 | gl2psbackends[gl2ps->format]->printFinalPrimitive(); |
---|
| 5591 | |
---|
| 5592 | return GL2PS_SUCCESS; |
---|
| 5593 | } |
---|
| 5594 | |
---|
| 5595 | /********************************************************************* |
---|
| 5596 | * |
---|
| 5597 | * Public routines |
---|
| 5598 | * |
---|
| 5599 | *********************************************************************/ |
---|
| 5600 | |
---|
| 5601 | GL2PSDLL_API GLint gl2psBeginPage(const char *title, const char *producer, |
---|
| 5602 | GLint viewport[4], GLint format, GLint sort, |
---|
| 5603 | GLint options, GLint colormode, |
---|
| 5604 | GLint colorsize, GL2PSrgba *colormap, |
---|
| 5605 | GLint nr, GLint ng, GLint nb, GLint buffersize, |
---|
| 5606 | FILE *stream, const char *filename) |
---|
| 5607 | { |
---|
| 5608 | GLint index; |
---|
| 5609 | int i; |
---|
| 5610 | |
---|
| 5611 | if(gl2ps){ |
---|
| 5612 | gl2psMsg(GL2PS_ERROR, "gl2psBeginPage called in wrong program state"); |
---|
| 5613 | return GL2PS_ERROR; |
---|
| 5614 | } |
---|
| 5615 | |
---|
| 5616 | gl2ps = (GL2PScontext*)gl2psMalloc(sizeof(GL2PScontext)); |
---|
| 5617 | |
---|
| 5618 | if(format >= 0 && format < (GLint)(sizeof(gl2psbackends) / sizeof(gl2psbackends[0]))){ |
---|
| 5619 | gl2ps->format = format; |
---|
| 5620 | } |
---|
| 5621 | else { |
---|
| 5622 | gl2psMsg(GL2PS_ERROR, "Unknown output format: %d", format); |
---|
| 5623 | gl2psFree(gl2ps); |
---|
| 5624 | gl2ps = NULL; |
---|
| 5625 | return GL2PS_ERROR; |
---|
| 5626 | } |
---|
| 5627 | |
---|
| 5628 | switch(sort){ |
---|
| 5629 | case GL2PS_NO_SORT : |
---|
| 5630 | case GL2PS_SIMPLE_SORT : |
---|
| 5631 | case GL2PS_BSP_SORT : |
---|
| 5632 | gl2ps->sort = sort; |
---|
| 5633 | break; |
---|
| 5634 | default : |
---|
| 5635 | gl2psMsg(GL2PS_ERROR, "Unknown sorting algorithm: %d", sort); |
---|
| 5636 | gl2psFree(gl2ps); |
---|
| 5637 | gl2ps = NULL; |
---|
| 5638 | return GL2PS_ERROR; |
---|
| 5639 | } |
---|
| 5640 | |
---|
| 5641 | if(stream){ |
---|
| 5642 | gl2ps->stream = stream; |
---|
| 5643 | } |
---|
| 5644 | else{ |
---|
| 5645 | gl2psMsg(GL2PS_ERROR, "Bad file pointer"); |
---|
| 5646 | gl2psFree(gl2ps); |
---|
| 5647 | gl2ps = NULL; |
---|
| 5648 | return GL2PS_ERROR; |
---|
| 5649 | } |
---|
| 5650 | |
---|
| 5651 | gl2ps->header = GL_TRUE; |
---|
| 5652 | gl2ps->maxbestroot = 10; |
---|
| 5653 | gl2ps->options = options; |
---|
| 5654 | gl2ps->compress = NULL; |
---|
| 5655 | gl2ps->imagemap_head = NULL; |
---|
| 5656 | gl2ps->imagemap_tail = NULL; |
---|
| 5657 | |
---|
| 5658 | if(gl2ps->options & GL2PS_USE_CURRENT_VIEWPORT){ |
---|
| 5659 | glGetIntegerv(GL_VIEWPORT, gl2ps->viewport); |
---|
| 5660 | } |
---|
| 5661 | else{ |
---|
| 5662 | for(i = 0; i < 4; i++){ |
---|
| 5663 | gl2ps->viewport[i] = viewport[i]; |
---|
| 5664 | } |
---|
| 5665 | } |
---|
| 5666 | |
---|
| 5667 | if(!gl2ps->viewport[2] || !gl2ps->viewport[3]){ |
---|
| 5668 | gl2psMsg(GL2PS_ERROR, "Incorrect viewport (x=%d, y=%d, width=%d, height=%d)", |
---|
| 5669 | gl2ps->viewport[0], gl2ps->viewport[1], |
---|
| 5670 | gl2ps->viewport[2], gl2ps->viewport[3]); |
---|
| 5671 | gl2psFree(gl2ps); |
---|
| 5672 | gl2ps = NULL; |
---|
| 5673 | return GL2PS_ERROR; |
---|
| 5674 | } |
---|
| 5675 | |
---|
| 5676 | gl2ps->threshold[0] = nr ? 1.0F / (GLfloat)nr : 0.064F; |
---|
| 5677 | gl2ps->threshold[1] = ng ? 1.0F / (GLfloat)ng : 0.034F; |
---|
| 5678 | gl2ps->threshold[2] = nb ? 1.0F / (GLfloat)nb : 0.100F; |
---|
| 5679 | gl2ps->colormode = colormode; |
---|
| 5680 | gl2ps->buffersize = buffersize > 0 ? buffersize : 2048 * 2048; |
---|
| 5681 | for(i = 0; i < 3; i++){ |
---|
| 5682 | gl2ps->lastvertex.xyz[i] = -1.0F; |
---|
| 5683 | } |
---|
| 5684 | for(i = 0; i < 4; i++){ |
---|
| 5685 | gl2ps->lastvertex.rgba[i] = -1.0F; |
---|
| 5686 | gl2ps->lastrgba[i] = -1.0F; |
---|
| 5687 | } |
---|
| 5688 | gl2ps->lastlinewidth = -1.0F; |
---|
| 5689 | gl2ps->lastpattern = 0; |
---|
| 5690 | gl2ps->lastfactor = 0; |
---|
| 5691 | gl2ps->imagetree = NULL; |
---|
| 5692 | gl2ps->primitivetoadd = NULL; |
---|
| 5693 | gl2ps->zerosurfacearea = GL_FALSE; |
---|
| 5694 | gl2ps->pdfprimlist = NULL; |
---|
| 5695 | gl2ps->pdfgrouplist = NULL; |
---|
| 5696 | gl2ps->xreflist = NULL; |
---|
| 5697 | |
---|
| 5698 | /* get default blending mode from current OpenGL state (enabled by |
---|
| 5699 | default for SVG) */ |
---|
| 5700 | gl2ps->blending = (gl2ps->format == GL2PS_SVG) ? GL_TRUE : glIsEnabled(GL_BLEND); |
---|
| 5701 | glGetIntegerv(GL_BLEND_SRC, &gl2ps->blendfunc[0]); |
---|
| 5702 | glGetIntegerv(GL_BLEND_DST, &gl2ps->blendfunc[1]); |
---|
| 5703 | |
---|
| 5704 | if(gl2ps->colormode == GL_RGBA){ |
---|
| 5705 | gl2ps->colorsize = 0; |
---|
| 5706 | gl2ps->colormap = NULL; |
---|
| 5707 | glGetFloatv(GL_COLOR_CLEAR_VALUE, gl2ps->bgcolor); |
---|
| 5708 | } |
---|
| 5709 | else if(gl2ps->colormode == GL_COLOR_INDEX){ |
---|
| 5710 | if(!colorsize || !colormap){ |
---|
| 5711 | gl2psMsg(GL2PS_ERROR, "Missing colormap for GL_COLOR_INDEX rendering"); |
---|
| 5712 | gl2psFree(gl2ps); |
---|
| 5713 | gl2ps = NULL; |
---|
| 5714 | return GL2PS_ERROR; |
---|
| 5715 | } |
---|
| 5716 | gl2ps->colorsize = colorsize; |
---|
| 5717 | gl2ps->colormap = (GL2PSrgba*)gl2psMalloc(gl2ps->colorsize * sizeof(GL2PSrgba)); |
---|
| 5718 | memcpy(gl2ps->colormap, colormap, gl2ps->colorsize * sizeof(GL2PSrgba)); |
---|
| 5719 | glGetIntegerv(GL_INDEX_CLEAR_VALUE, &index); |
---|
| 5720 | gl2ps->bgcolor[0] = gl2ps->colormap[index][0]; |
---|
| 5721 | gl2ps->bgcolor[1] = gl2ps->colormap[index][1]; |
---|
| 5722 | gl2ps->bgcolor[2] = gl2ps->colormap[index][2]; |
---|
| 5723 | gl2ps->bgcolor[3] = 1.0F; |
---|
| 5724 | } |
---|
| 5725 | else{ |
---|
| 5726 | gl2psMsg(GL2PS_ERROR, "Unknown color mode in gl2psBeginPage"); |
---|
| 5727 | gl2psFree(gl2ps); |
---|
| 5728 | gl2ps = NULL; |
---|
| 5729 | return GL2PS_ERROR; |
---|
| 5730 | } |
---|
| 5731 | |
---|
| 5732 | if(!title){ |
---|
| 5733 | gl2ps->title = (char*)gl2psMalloc(sizeof(char)); |
---|
| 5734 | gl2ps->title[0] = '\0'; |
---|
| 5735 | } |
---|
| 5736 | else{ |
---|
| 5737 | gl2ps->title = (char*)gl2psMalloc((strlen(title)+1)*sizeof(char)); |
---|
| 5738 | strcpy(gl2ps->title, title); |
---|
| 5739 | } |
---|
| 5740 | |
---|
| 5741 | if(!producer){ |
---|
| 5742 | gl2ps->producer = (char*)gl2psMalloc(sizeof(char)); |
---|
| 5743 | gl2ps->producer[0] = '\0'; |
---|
| 5744 | } |
---|
| 5745 | else{ |
---|
| 5746 | gl2ps->producer = (char*)gl2psMalloc((strlen(producer)+1)*sizeof(char)); |
---|
| 5747 | strcpy(gl2ps->producer, producer); |
---|
| 5748 | } |
---|
| 5749 | |
---|
| 5750 | if(!filename){ |
---|
| 5751 | gl2ps->filename = (char*)gl2psMalloc(sizeof(char)); |
---|
| 5752 | gl2ps->filename[0] = '\0'; |
---|
| 5753 | } |
---|
| 5754 | else{ |
---|
| 5755 | gl2ps->filename = (char*)gl2psMalloc((strlen(filename)+1)*sizeof(char)); |
---|
| 5756 | strcpy(gl2ps->filename, filename); |
---|
| 5757 | } |
---|
| 5758 | |
---|
| 5759 | gl2ps->primitives = gl2psListCreate(500, 500, sizeof(GL2PSprimitive*)); |
---|
| 5760 | gl2ps->auxprimitives = gl2psListCreate(100, 100, sizeof(GL2PSprimitive*)); |
---|
| 5761 | gl2ps->feedback = (GLfloat*)gl2psMalloc(gl2ps->buffersize * sizeof(GLfloat)); |
---|
| 5762 | glFeedbackBuffer(gl2ps->buffersize, GL_3D_COLOR, gl2ps->feedback); |
---|
| 5763 | glRenderMode(GL_FEEDBACK); |
---|
| 5764 | |
---|
| 5765 | return GL2PS_SUCCESS; |
---|
| 5766 | } |
---|
| 5767 | |
---|
| 5768 | GL2PSDLL_API GLint gl2psEndPage(void) |
---|
| 5769 | { |
---|
| 5770 | GLint res; |
---|
| 5771 | |
---|
| 5772 | if(!gl2ps) return GL2PS_UNINITIALIZED; |
---|
| 5773 | |
---|
| 5774 | res = gl2psPrintPrimitives(); |
---|
| 5775 | |
---|
| 5776 | if(res != GL2PS_OVERFLOW) |
---|
| 5777 | (gl2psbackends[gl2ps->format]->printFooter)(); |
---|
| 5778 | |
---|
| 5779 | fflush(gl2ps->stream); |
---|
| 5780 | |
---|
| 5781 | gl2psListDelete(gl2ps->primitives); |
---|
| 5782 | gl2psListDelete(gl2ps->auxprimitives); |
---|
| 5783 | gl2psFreeImagemap(gl2ps->imagemap_head); |
---|
| 5784 | gl2psFree(gl2ps->colormap); |
---|
| 5785 | gl2psFree(gl2ps->title); |
---|
| 5786 | gl2psFree(gl2ps->producer); |
---|
| 5787 | gl2psFree(gl2ps->filename); |
---|
| 5788 | gl2psFree(gl2ps->feedback); |
---|
| 5789 | gl2psFree(gl2ps); |
---|
| 5790 | gl2ps = NULL; |
---|
| 5791 | |
---|
| 5792 | return res; |
---|
| 5793 | } |
---|
| 5794 | |
---|
| 5795 | GL2PSDLL_API GLint gl2psBeginViewport(GLint viewport[4]) |
---|
| 5796 | { |
---|
| 5797 | if(!gl2ps) return GL2PS_UNINITIALIZED; |
---|
| 5798 | |
---|
| 5799 | (gl2psbackends[gl2ps->format]->beginViewport)(viewport); |
---|
| 5800 | |
---|
| 5801 | return GL2PS_SUCCESS; |
---|
| 5802 | } |
---|
| 5803 | |
---|
| 5804 | GL2PSDLL_API GLint gl2psEndViewport(void) |
---|
| 5805 | { |
---|
| 5806 | GLint res; |
---|
| 5807 | |
---|
| 5808 | if(!gl2ps) return GL2PS_UNINITIALIZED; |
---|
| 5809 | |
---|
| 5810 | res = (gl2psbackends[gl2ps->format]->endViewport)(); |
---|
| 5811 | |
---|
| 5812 | /* reset last used colors, line widths */ |
---|
| 5813 | gl2ps->lastlinewidth = -1.0F; |
---|
| 5814 | |
---|
| 5815 | return res; |
---|
| 5816 | } |
---|
| 5817 | |
---|
| 5818 | GL2PSDLL_API GLint gl2psTextOpt(const char *str, const char *fontname, |
---|
| 5819 | GLshort fontsize, GLint alignment, GLfloat angle) |
---|
| 5820 | { |
---|
| 5821 | return gl2psAddText(GL2PS_TEXT, str, fontname, fontsize, alignment, angle); |
---|
| 5822 | } |
---|
| 5823 | |
---|
| 5824 | GL2PSDLL_API GLint gl2psText(const char *str, const char *fontname, GLshort fontsize) |
---|
| 5825 | { |
---|
| 5826 | return gl2psAddText(GL2PS_TEXT, str, fontname, fontsize, GL2PS_TEXT_BL, 0.0F); |
---|
| 5827 | } |
---|
| 5828 | |
---|
| 5829 | GL2PSDLL_API GLint gl2psSpecial(GLint format, const char *str) |
---|
| 5830 | { |
---|
| 5831 | return gl2psAddText(GL2PS_SPECIAL, str, "", 0, format, 0.0F); |
---|
| 5832 | } |
---|
| 5833 | |
---|
| 5834 | GL2PSDLL_API GLint gl2psDrawPixels(GLsizei width, GLsizei height, |
---|
| 5835 | GLint xorig, GLint yorig, |
---|
| 5836 | GLenum format, GLenum type, |
---|
| 5837 | const void *pixels) |
---|
| 5838 | { |
---|
| 5839 | int size, i; |
---|
| 5840 | GLfloat pos[4], *piv; |
---|
| 5841 | GL2PSprimitive *prim; |
---|
| 5842 | GLboolean valid; |
---|
| 5843 | |
---|
| 5844 | if(!gl2ps || !pixels) return GL2PS_UNINITIALIZED; |
---|
| 5845 | |
---|
| 5846 | if((width <= 0) || (height <= 0)) return GL2PS_ERROR; |
---|
| 5847 | |
---|
| 5848 | if(gl2ps->options & GL2PS_NO_PIXMAP) return GL2PS_SUCCESS; |
---|
| 5849 | |
---|
| 5850 | if((format != GL_RGB && format != GL_RGBA) || type != GL_FLOAT){ |
---|
| 5851 | gl2psMsg(GL2PS_ERROR, "gl2psDrawPixels only implemented for " |
---|
| 5852 | "GL_RGB/GL_RGBA, GL_FLOAT pixels"); |
---|
| 5853 | return GL2PS_ERROR; |
---|
| 5854 | } |
---|
| 5855 | |
---|
| 5856 | glGetBooleanv(GL_CURRENT_RASTER_POSITION_VALID, &valid); |
---|
| 5857 | if(GL_FALSE == valid) return GL2PS_SUCCESS; /* the primitive is culled */ |
---|
| 5858 | |
---|
| 5859 | glGetFloatv(GL_CURRENT_RASTER_POSITION, pos); |
---|
| 5860 | |
---|
| 5861 | prim = (GL2PSprimitive*)gl2psMalloc(sizeof(GL2PSprimitive)); |
---|
| 5862 | prim->type = GL2PS_PIXMAP; |
---|
| 5863 | prim->boundary = 0; |
---|
| 5864 | prim->numverts = 1; |
---|
| 5865 | prim->verts = (GL2PSvertex*)gl2psMalloc(sizeof(GL2PSvertex)); |
---|
| 5866 | prim->verts[0].xyz[0] = pos[0] + xorig; |
---|
| 5867 | prim->verts[0].xyz[1] = pos[1] + yorig; |
---|
| 5868 | prim->verts[0].xyz[2] = pos[2]; |
---|
| 5869 | prim->culled = 0; |
---|
| 5870 | prim->offset = 0; |
---|
| 5871 | prim->pattern = 0; |
---|
| 5872 | prim->factor = 0; |
---|
| 5873 | prim->width = 1; |
---|
| 5874 | glGetFloatv(GL_CURRENT_RASTER_COLOR, prim->verts[0].rgba); |
---|
| 5875 | prim->data.image = (GL2PSimage*)gl2psMalloc(sizeof(GL2PSimage)); |
---|
| 5876 | prim->data.image->width = width; |
---|
| 5877 | prim->data.image->height = height; |
---|
| 5878 | prim->data.image->format = format; |
---|
| 5879 | prim->data.image->type = type; |
---|
| 5880 | |
---|
| 5881 | switch(format){ |
---|
| 5882 | case GL_RGBA: |
---|
| 5883 | if(gl2ps->options & GL2PS_NO_BLENDING || !gl2ps->blending){ |
---|
| 5884 | /* special case: blending turned off */ |
---|
| 5885 | prim->data.image->format = GL_RGB; |
---|
| 5886 | size = height * width * 3; |
---|
| 5887 | prim->data.image->pixels = (GLfloat*)gl2psMalloc(size * sizeof(GLfloat)); |
---|
| 5888 | piv = (GLfloat*)pixels; |
---|
| 5889 | for(i = 0; i < size; ++i, ++piv){ |
---|
| 5890 | prim->data.image->pixels[i] = *piv; |
---|
| 5891 | if(!((i+1)%3)) |
---|
| 5892 | ++piv; |
---|
| 5893 | } |
---|
| 5894 | } |
---|
| 5895 | else{ |
---|
| 5896 | size = height * width * 4; |
---|
| 5897 | prim->data.image->pixels = (GLfloat*)gl2psMalloc(size * sizeof(GLfloat)); |
---|
| 5898 | memcpy(prim->data.image->pixels, pixels, size * sizeof(GLfloat)); |
---|
| 5899 | } |
---|
| 5900 | break; |
---|
| 5901 | case GL_RGB: |
---|
| 5902 | default: |
---|
| 5903 | size = height * width * 3; |
---|
| 5904 | prim->data.image->pixels = (GLfloat*)gl2psMalloc(size * sizeof(GLfloat)); |
---|
| 5905 | memcpy(prim->data.image->pixels, pixels, size * sizeof(GLfloat)); |
---|
| 5906 | break; |
---|
| 5907 | } |
---|
| 5908 | |
---|
| 5909 | gl2psListAdd(gl2ps->auxprimitives, &prim); |
---|
| 5910 | glPassThrough(GL2PS_DRAW_PIXELS_TOKEN); |
---|
| 5911 | |
---|
| 5912 | return GL2PS_SUCCESS; |
---|
| 5913 | } |
---|
| 5914 | |
---|
| 5915 | GL2PSDLL_API GLint gl2psDrawImageMap(GLsizei width, GLsizei height, |
---|
| 5916 | const GLfloat position[3], |
---|
| 5917 | const unsigned char *imagemap){ |
---|
| 5918 | int size, i; |
---|
| 5919 | int sizeoffloat = sizeof(GLfloat); |
---|
| 5920 | |
---|
| 5921 | if(!gl2ps || !imagemap) return GL2PS_UNINITIALIZED; |
---|
| 5922 | |
---|
| 5923 | if((width <= 0) || (height <= 0)) return GL2PS_ERROR; |
---|
| 5924 | |
---|
| 5925 | size = height + height * ((width - 1) / 8); |
---|
| 5926 | glPassThrough(GL2PS_IMAGEMAP_TOKEN); |
---|
| 5927 | glBegin(GL_POINTS); |
---|
| 5928 | glVertex3f(position[0], position[1],position[2]); |
---|
| 5929 | glEnd(); |
---|
| 5930 | glPassThrough((GLfloat)width); |
---|
| 5931 | glPassThrough((GLfloat)height); |
---|
| 5932 | for(i = 0; i < size; i += sizeoffloat){ |
---|
| 5933 | float *value = (float*)imagemap; |
---|
| 5934 | glPassThrough(*value); |
---|
| 5935 | imagemap += sizeoffloat; |
---|
| 5936 | } |
---|
| 5937 | return GL2PS_SUCCESS; |
---|
| 5938 | } |
---|
| 5939 | |
---|
| 5940 | GL2PSDLL_API GLint gl2psEnable(GLint mode) |
---|
| 5941 | { |
---|
| 5942 | GLint tmp; |
---|
| 5943 | |
---|
| 5944 | if(!gl2ps) return GL2PS_UNINITIALIZED; |
---|
| 5945 | |
---|
| 5946 | switch(mode){ |
---|
| 5947 | case GL2PS_POLYGON_OFFSET_FILL : |
---|
| 5948 | glPassThrough(GL2PS_BEGIN_OFFSET_TOKEN); |
---|
| 5949 | glGetFloatv(GL_POLYGON_OFFSET_FACTOR, &gl2ps->offset[0]); |
---|
| 5950 | glGetFloatv(GL_POLYGON_OFFSET_UNITS, &gl2ps->offset[1]); |
---|
| 5951 | break; |
---|
| 5952 | case GL2PS_POLYGON_BOUNDARY : |
---|
| 5953 | glPassThrough(GL2PS_BEGIN_BOUNDARY_TOKEN); |
---|
| 5954 | break; |
---|
| 5955 | case GL2PS_LINE_STIPPLE : |
---|
| 5956 | glPassThrough(GL2PS_BEGIN_STIPPLE_TOKEN); |
---|
| 5957 | glGetIntegerv(GL_LINE_STIPPLE_PATTERN, &tmp); |
---|
| 5958 | glPassThrough((GLfloat)tmp); |
---|
| 5959 | glGetIntegerv(GL_LINE_STIPPLE_REPEAT, &tmp); |
---|
| 5960 | glPassThrough((GLfloat)tmp); |
---|
| 5961 | break; |
---|
| 5962 | case GL2PS_BLEND : |
---|
| 5963 | glPassThrough(GL2PS_BEGIN_BLEND_TOKEN); |
---|
| 5964 | break; |
---|
| 5965 | default : |
---|
| 5966 | gl2psMsg(GL2PS_WARNING, "Unknown mode in gl2psEnable: %d", mode); |
---|
| 5967 | return GL2PS_WARNING; |
---|
| 5968 | } |
---|
| 5969 | |
---|
| 5970 | return GL2PS_SUCCESS; |
---|
| 5971 | } |
---|
| 5972 | |
---|
| 5973 | GL2PSDLL_API GLint gl2psDisable(GLint mode) |
---|
| 5974 | { |
---|
| 5975 | if(!gl2ps) return GL2PS_UNINITIALIZED; |
---|
| 5976 | |
---|
| 5977 | switch(mode){ |
---|
| 5978 | case GL2PS_POLYGON_OFFSET_FILL : |
---|
| 5979 | glPassThrough(GL2PS_END_OFFSET_TOKEN); |
---|
| 5980 | break; |
---|
| 5981 | case GL2PS_POLYGON_BOUNDARY : |
---|
| 5982 | glPassThrough(GL2PS_END_BOUNDARY_TOKEN); |
---|
| 5983 | break; |
---|
| 5984 | case GL2PS_LINE_STIPPLE : |
---|
| 5985 | glPassThrough(GL2PS_END_STIPPLE_TOKEN); |
---|
| 5986 | break; |
---|
| 5987 | case GL2PS_BLEND : |
---|
| 5988 | glPassThrough(GL2PS_END_BLEND_TOKEN); |
---|
| 5989 | break; |
---|
| 5990 | default : |
---|
| 5991 | gl2psMsg(GL2PS_WARNING, "Unknown mode in gl2psDisable: %d", mode); |
---|
| 5992 | return GL2PS_WARNING; |
---|
| 5993 | } |
---|
| 5994 | |
---|
| 5995 | return GL2PS_SUCCESS; |
---|
| 5996 | } |
---|
| 5997 | |
---|
| 5998 | GL2PSDLL_API GLint gl2psPointSize(GLfloat value) |
---|
| 5999 | { |
---|
| 6000 | if(!gl2ps) return GL2PS_UNINITIALIZED; |
---|
| 6001 | |
---|
| 6002 | glPassThrough(GL2PS_POINT_SIZE_TOKEN); |
---|
| 6003 | glPassThrough(value); |
---|
| 6004 | |
---|
| 6005 | return GL2PS_SUCCESS; |
---|
| 6006 | } |
---|
| 6007 | |
---|
| 6008 | GL2PSDLL_API GLint gl2psLineWidth(GLfloat value) |
---|
| 6009 | { |
---|
| 6010 | if(!gl2ps) return GL2PS_UNINITIALIZED; |
---|
| 6011 | |
---|
| 6012 | glPassThrough(GL2PS_LINE_WIDTH_TOKEN); |
---|
| 6013 | glPassThrough(value); |
---|
| 6014 | |
---|
| 6015 | return GL2PS_SUCCESS; |
---|
| 6016 | } |
---|
| 6017 | |
---|
| 6018 | GL2PSDLL_API GLint gl2psBlendFunc(GLenum sfactor, GLenum dfactor) |
---|
| 6019 | { |
---|
| 6020 | if(!gl2ps) return GL2PS_UNINITIALIZED; |
---|
| 6021 | |
---|
| 6022 | if(GL_FALSE == gl2psSupportedBlendMode(sfactor, dfactor)) |
---|
| 6023 | return GL2PS_WARNING; |
---|
| 6024 | |
---|
| 6025 | glPassThrough(GL2PS_SRC_BLEND_TOKEN); |
---|
| 6026 | glPassThrough((GLfloat)sfactor); |
---|
| 6027 | glPassThrough(GL2PS_DST_BLEND_TOKEN); |
---|
| 6028 | glPassThrough((GLfloat)dfactor); |
---|
| 6029 | |
---|
| 6030 | return GL2PS_SUCCESS; |
---|
| 6031 | } |
---|
| 6032 | |
---|
| 6033 | GL2PSDLL_API GLint gl2psSetOptions(GLint options) |
---|
| 6034 | { |
---|
| 6035 | if(!gl2ps) return GL2PS_UNINITIALIZED; |
---|
| 6036 | |
---|
| 6037 | gl2ps->options = options; |
---|
| 6038 | |
---|
| 6039 | return GL2PS_SUCCESS; |
---|
| 6040 | } |
---|
| 6041 | |
---|
| 6042 | GL2PSDLL_API GLint gl2psGetOptions(GLint *options) |
---|
| 6043 | { |
---|
| 6044 | if(!gl2ps) { |
---|
| 6045 | *options = 0; |
---|
| 6046 | return GL2PS_UNINITIALIZED; |
---|
| 6047 | } |
---|
| 6048 | |
---|
| 6049 | *options = gl2ps->options; |
---|
| 6050 | |
---|
| 6051 | return GL2PS_SUCCESS; |
---|
| 6052 | } |
---|
| 6053 | |
---|
| 6054 | GL2PSDLL_API const char *gl2psGetFileExtension(GLint format) |
---|
| 6055 | { |
---|
| 6056 | if(format >= 0 && format < (GLint)(sizeof(gl2psbackends) / sizeof(gl2psbackends[0]))) |
---|
| 6057 | return gl2psbackends[format]->file_extension; |
---|
| 6058 | else |
---|
| 6059 | return "Unknown format"; |
---|
| 6060 | } |
---|
| 6061 | |
---|
| 6062 | GL2PSDLL_API const char *gl2psGetFormatDescription(GLint format) |
---|
| 6063 | { |
---|
| 6064 | if(format >= 0 && format < (GLint)(sizeof(gl2psbackends) / sizeof(gl2psbackends[0]))) |
---|
| 6065 | return gl2psbackends[format]->description; |
---|
| 6066 | else |
---|
| 6067 | return "Unknown format"; |
---|
| 6068 | } |
---|
| 6069 | #endif |
---|