[529] | 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_OI_DRIVER |
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| 27 | |
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| 28 | /* |
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| 29 | * GL2PS, an OpenGL to PostScript Printing Library |
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| 30 | * Copyright (C) 1999-2003 Christophe Geuzaine |
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| 31 | * |
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| 32 | * $Id: gl2ps.cc,v 1.11 2006/06/29 21:23:09 gunter Exp $ |
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| 33 | * |
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| 34 | * E-mail: geuz@geuz.org |
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| 35 | * URL: http://www.geuz.org/gl2ps/ |
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| 36 | * |
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| 37 | * This library is free software; you can redistribute it and/or |
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| 38 | * modify it under the terms of the GNU Library General Public |
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| 39 | * License as published by the Free Software Foundation; either |
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| 40 | * version 2 of the License, or (at your option) any later version. |
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| 41 | * |
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| 42 | * This library is distributed in the hope that it will be useful, |
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| 43 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 44 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 45 | * Library General Public License for more details. |
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| 46 | * |
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| 47 | * You should have received a copy of the GNU Library General Public |
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| 48 | * License along with this library; if not, write to the Free |
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| 49 | * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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| 50 | * |
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| 51 | */ |
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| 52 | |
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| 53 | #include <string.h> |
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| 54 | #include <sys/types.h> |
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| 55 | #include <stdarg.h> |
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| 56 | #include <time.h> |
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| 57 | #include "Geant4_gl2ps.h" |
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| 58 | |
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| 59 | /* The gl2ps context. gl2ps is not thread safe (we should create a |
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| 60 | local GL2PScontext during gl2psBeginPage). */ |
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| 61 | |
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| 62 | GL2PScontext *gl2ps = NULL; |
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| 63 | |
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| 64 | /* Some 'system' utility routines */ |
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| 65 | |
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| 66 | void gl2psMsg(GLint level, const char *fmt, ...){ |
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| 67 | va_list args; |
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| 68 | |
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| 69 | if(!(gl2ps->options & GL2PS_SILENT)){ |
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| 70 | switch(level){ |
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| 71 | case GL2PS_INFO : fprintf(stderr, "GL2PS info: "); break; |
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| 72 | case GL2PS_WARNING : fprintf(stderr, "GL2PS warning: "); break; |
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| 73 | case GL2PS_ERROR : fprintf(stderr, "GL2PS error: "); break; |
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| 74 | } |
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| 75 | va_start(args, fmt); |
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| 76 | vfprintf(stderr, fmt, args); |
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| 77 | va_end(args); |
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| 78 | fprintf(stderr, "\n"); |
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| 79 | } |
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| 80 | /* |
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| 81 | if(level == GL2PS_ERROR) exit(1); |
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| 82 | */ |
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| 83 | } |
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| 84 | |
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| 85 | void *gl2psMalloc(size_t size){ |
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| 86 | void *ptr; |
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| 87 | |
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| 88 | if(!size) return(NULL); |
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| 89 | ptr = malloc(size); |
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| 90 | if(!ptr){ |
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| 91 | gl2psMsg(GL2PS_ERROR, "Couldn't allocate requested memory"); |
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| 92 | exit(1); |
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| 93 | } |
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| 94 | return(ptr); |
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| 95 | } |
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| 96 | |
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| 97 | void *gl2psRealloc(void *ptr, size_t size){ |
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| 98 | if(!size) return(NULL); |
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| 99 | ptr = realloc(ptr, size); |
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| 100 | if(!ptr){ |
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| 101 | gl2psMsg(GL2PS_ERROR, "Couldn't reallocate requested memory"); |
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| 102 | exit(1); |
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| 103 | } |
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| 104 | return(ptr); |
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| 105 | } |
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| 106 | |
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| 107 | void gl2psFree(void *ptr){ |
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| 108 | if(!ptr) return; |
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| 109 | free(ptr); |
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| 110 | } |
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| 111 | |
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| 112 | /* The list handling routines */ |
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| 113 | |
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| 114 | void gl2psListRealloc(GL2PSlist *list, GLint n){ |
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| 115 | if(n <= 0) return; |
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| 116 | if(!list->array){ |
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| 117 | list->nmax = ((n - 1) / list->incr + 1) * list->incr; |
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| 118 | list->array = (char *)gl2psMalloc(list->nmax * list->size); |
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| 119 | } |
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| 120 | else{ |
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| 121 | if(n > list->nmax){ |
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| 122 | list->nmax = ((n - 1) / list->incr + 1) * list->incr; |
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| 123 | list->array = (char *)gl2psRealloc(list->array, |
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| 124 | list->nmax * list->size); |
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| 125 | } |
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| 126 | } |
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| 127 | } |
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| 128 | |
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| 129 | GL2PSlist *gl2psListCreate(GLint n, GLint incr, GLint size){ |
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| 130 | GL2PSlist *list; |
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| 131 | |
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| 132 | if(n < 0) n = 0; |
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| 133 | if(incr <= 0) incr = 1; |
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| 134 | list = (GL2PSlist *)gl2psMalloc(sizeof(GL2PSlist)); |
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| 135 | list->nmax = 0; |
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| 136 | list->incr = incr; |
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| 137 | list->size = size; |
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| 138 | list->n = 0; |
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| 139 | list->array = NULL; |
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| 140 | gl2psListRealloc(list, n); |
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| 141 | return(list); |
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| 142 | } |
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| 143 | |
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| 144 | void gl2psListReset(GL2PSlist *list){ |
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| 145 | list->n = 0; |
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| 146 | } |
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| 147 | |
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| 148 | void gl2psListDelete(GL2PSlist *list){ |
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| 149 | gl2psFree(list->array); |
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| 150 | gl2psFree(list); |
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| 151 | } |
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| 152 | |
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| 153 | void gl2psListAdd(GL2PSlist *list, void *data){ |
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| 154 | list->n++; |
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| 155 | gl2psListRealloc(list, list->n); |
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| 156 | memcpy(&list->array[(list->n - 1) * list->size], data, list->size); |
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| 157 | } |
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| 158 | |
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| 159 | GLint gl2psListNbr(GL2PSlist *list){ |
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| 160 | return(list->n); |
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| 161 | } |
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| 162 | |
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| 163 | void *gl2psListPointer(GL2PSlist *list, GLint index){ |
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| 164 | if((index < 0) || (index >= list->n)){ |
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| 165 | gl2psMsg(GL2PS_ERROR, "Wrong list index in gl2psListPointer"); |
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| 166 | return(&list->array[0]); |
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| 167 | } |
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| 168 | return(&list->array[index * list->size]); |
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| 169 | } |
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| 170 | |
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| 171 | void gl2psListSort(GL2PSlist *list, |
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| 172 | int (*fcmp)(const void *a, const void *b)){ |
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| 173 | qsort(list->array, list->n, list->size, fcmp); |
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| 174 | } |
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| 175 | |
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| 176 | void gl2psListAction(GL2PSlist *list, |
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| 177 | void (*action)(void *data, void *dummy)){ |
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| 178 | GLint i, dummy; |
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| 179 | |
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| 180 | for(i = 0; i < gl2psListNbr(list); i++){ |
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| 181 | (*action)(gl2psListPointer(list, i), &dummy); |
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| 182 | } |
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| 183 | } |
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| 184 | |
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| 185 | void gl2psListActionInverse(GL2PSlist *list, |
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| 186 | void (*action)(void *data, void *dummy)){ |
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| 187 | GLint i, dummy; |
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| 188 | |
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| 189 | for(i = gl2psListNbr(list); i > 0; i--){ |
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| 190 | (*action)(gl2psListPointer(list, i-1), &dummy); |
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| 191 | } |
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| 192 | } |
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| 193 | |
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| 194 | /* The 3D sorting routines */ |
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| 195 | |
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| 196 | GLfloat gl2psComparePointPlane(GL2PSxyz point, GL2PSplane plane){ |
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| 197 | return(plane[0] * point[0] + |
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| 198 | plane[1] * point[1] + |
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| 199 | plane[2] * point[2] + |
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| 200 | plane[3]); |
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| 201 | } |
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| 202 | |
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| 203 | GLfloat gl2psPsca(GLfloat *a, GLfloat *b){ |
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| 204 | return(a[0]*b[0] + a[1]*b[1] + a[2]*b[2]); |
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| 205 | } |
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| 206 | |
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| 207 | void gl2psPvec(GLfloat *a, GLfloat *b, GLfloat *c){ |
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| 208 | c[0] = a[1]*b[2] - a[2]*b[1]; |
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| 209 | c[1] = a[2]*b[0] - a[0]*b[2]; |
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| 210 | c[2] = a[0]*b[1] - a[1]*b[0]; |
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| 211 | } |
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| 212 | |
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| 213 | GLfloat gl2psNorm(GLfloat *a){ |
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| 214 | return std::sqrt(a[0]*a[0] + a[1]*a[1] + a[2]*a[2]); |
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| 215 | } |
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| 216 | |
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| 217 | void gl2psGetNormal(GLfloat *a, GLfloat *b, GLfloat *c){ |
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| 218 | GLfloat norm; |
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| 219 | |
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| 220 | gl2psPvec(a, b, c); |
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| 221 | if(!GL2PS_ZERO(norm = gl2psNorm(c))){ |
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| 222 | c[0] = c[0] / norm; |
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| 223 | c[1] = c[1] / norm; |
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| 224 | c[2] = c[2] / norm; |
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| 225 | } |
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| 226 | else{ |
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| 227 | /* The plane is still wrong, despite our tests in |
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| 228 | gl2psGetPlane... Let's return a dummy value (this is a hack: we |
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| 229 | should do more tests in GetPlane): */ |
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| 230 | c[0] = c[1] = 0.; |
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| 231 | c[2] = 1.; |
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| 232 | } |
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| 233 | } |
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| 234 | |
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| 235 | void gl2psGetPlane(GL2PSprimitive *prim, GL2PSplane plane){ |
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| 236 | GL2PSxyz v = {0., 0., 0.}, w = {0., 0., 0.}; |
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| 237 | |
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| 238 | switch(prim->type){ |
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| 239 | case GL2PS_TRIANGLE : |
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| 240 | case GL2PS_QUADRANGLE : |
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| 241 | v[0] = prim->verts[1].xyz[0] - prim->verts[0].xyz[0]; |
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| 242 | v[1] = prim->verts[1].xyz[1] - prim->verts[0].xyz[1]; |
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| 243 | v[2] = prim->verts[1].xyz[2] - prim->verts[0].xyz[2]; |
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| 244 | w[0] = prim->verts[2].xyz[0] - prim->verts[0].xyz[0]; |
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| 245 | w[1] = prim->verts[2].xyz[1] - prim->verts[0].xyz[1]; |
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| 246 | w[2] = prim->verts[2].xyz[2] - prim->verts[0].xyz[2]; |
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| 247 | if((GL2PS_ZERO(v[0]) && GL2PS_ZERO(v[1]) && GL2PS_ZERO(v[2])) || |
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| 248 | (GL2PS_ZERO(w[0]) && GL2PS_ZERO(w[1]) && GL2PS_ZERO(w[2]))){ |
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| 249 | plane[0] = plane[1] = 0.; |
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| 250 | plane[2] = 1.; |
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| 251 | plane[3] = -prim->verts[0].xyz[2]; |
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| 252 | } |
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| 253 | else{ |
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| 254 | gl2psGetNormal(v, w, plane); |
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| 255 | plane[3] = |
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| 256 | - plane[0] * prim->verts[0].xyz[0] |
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| 257 | - plane[1] * prim->verts[0].xyz[1] |
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| 258 | - plane[2] * prim->verts[0].xyz[2]; |
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| 259 | } |
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| 260 | break; |
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| 261 | case GL2PS_LINE : |
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| 262 | v[0] = prim->verts[1].xyz[0] - prim->verts[0].xyz[0]; |
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| 263 | v[1] = prim->verts[1].xyz[1] - prim->verts[0].xyz[1]; |
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| 264 | v[2] = prim->verts[1].xyz[2] - prim->verts[0].xyz[2]; |
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| 265 | if(GL2PS_ZERO(v[0]) && GL2PS_ZERO(v[1]) && GL2PS_ZERO(v[2])){ |
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| 266 | plane[0] = plane[1] = 0.; |
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| 267 | plane[2] = 1.; |
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| 268 | plane[3] = -prim->verts[0].xyz[2]; |
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| 269 | } |
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| 270 | else{ |
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| 271 | if(GL2PS_ZERO(v[0])) w[0] = 1.; |
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| 272 | else if(GL2PS_ZERO(v[1])) w[1] = 1.; |
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| 273 | else w[2] = 1.; |
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| 274 | gl2psGetNormal(v, w, plane); |
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| 275 | plane[3] = |
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| 276 | - plane[0] * prim->verts[0].xyz[0] |
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| 277 | - plane[1] * prim->verts[0].xyz[1] |
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| 278 | - plane[2] * prim->verts[0].xyz[2]; |
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| 279 | } |
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| 280 | break; |
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| 281 | case GL2PS_POINT : |
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| 282 | case GL2PS_PIXMAP : |
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| 283 | case GL2PS_TEXT : |
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| 284 | plane[0] = plane[1] = 0.; |
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| 285 | plane[2] = 1.; |
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| 286 | plane[3] = -prim->verts[0].xyz[2]; |
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| 287 | break; |
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| 288 | default : |
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| 289 | gl2psMsg(GL2PS_ERROR, "Unknown primitive type in BSP tree"); |
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| 290 | plane[0] = plane[1] = plane[3] = 0.; |
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| 291 | plane[2] = 1.; |
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| 292 | break; |
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| 293 | } |
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| 294 | } |
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| 295 | |
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| 296 | void gl2psCutEdge(GL2PSvertex *a, GL2PSvertex *b, GL2PSplane plane, |
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| 297 | GL2PSvertex *c){ |
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| 298 | GL2PSxyz v; |
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| 299 | GLfloat sect; |
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| 300 | |
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| 301 | v[0] = b->xyz[0] - a->xyz[0]; |
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| 302 | v[1] = b->xyz[1] - a->xyz[1]; |
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| 303 | v[2] = b->xyz[2] - a->xyz[2]; |
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| 304 | sect = - gl2psComparePointPlane(a->xyz, plane) / gl2psPsca(plane, v); |
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| 305 | |
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| 306 | c->xyz[0] = a->xyz[0] + v[0] * sect; |
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| 307 | c->xyz[1] = a->xyz[1] + v[1] * sect; |
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| 308 | c->xyz[2] = a->xyz[2] + v[2] * sect; |
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| 309 | |
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| 310 | c->rgba[0] = (1.-sect) * a->rgba[0] + sect * b->rgba[0]; |
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| 311 | c->rgba[1] = (1.-sect) * a->rgba[1] + sect * b->rgba[1]; |
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| 312 | c->rgba[2] = (1.-sect) * a->rgba[2] + sect * b->rgba[2]; |
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| 313 | c->rgba[3] = (1.-sect) * a->rgba[3] + sect * b->rgba[3]; |
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| 314 | } |
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| 315 | |
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| 316 | void gl2psCreateSplitPrimitive(GL2PSprimitive *parent, GL2PSplane plane, |
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| 317 | GL2PSprimitive *child, GLshort numverts, |
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| 318 | GLshort *index0, GLshort *index1){ |
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| 319 | GLshort i; |
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| 320 | |
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| 321 | if(numverts > 4){ |
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| 322 | gl2psMsg(GL2PS_WARNING, "%d vertices in polygon", numverts); |
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| 323 | numverts = 4; |
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| 324 | } |
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| 325 | |
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| 326 | switch(numverts){ |
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| 327 | case 1 : child->type = GL2PS_POINT; break; |
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| 328 | case 2 : child->type = GL2PS_LINE; break; |
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| 329 | case 3 : child->type = GL2PS_TRIANGLE; break; |
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| 330 | case 4 : child->type = GL2PS_QUADRANGLE; break; |
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| 331 | } |
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| 332 | child->boundary = 0; /* not done! */ |
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| 333 | child->depth = parent->depth; /* should not be used in this case */ |
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| 334 | child->culled = parent->culled; |
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| 335 | child->dash = parent->dash; |
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| 336 | child->width = parent->width; |
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| 337 | child->numverts = numverts; |
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| 338 | child->verts = (GL2PSvertex *)gl2psMalloc(numverts * sizeof(GL2PSvertex)); |
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| 339 | |
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| 340 | for(i = 0; i < numverts; i++){ |
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| 341 | if(index1[i] < 0){ |
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| 342 | child->verts[i] = parent->verts[index0[i]]; |
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| 343 | } |
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| 344 | else{ |
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| 345 | gl2psCutEdge(&parent->verts[index0[i]], &parent->verts[index1[i]], |
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| 346 | plane, &child->verts[i]); |
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| 347 | } |
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| 348 | } |
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| 349 | } |
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| 350 | |
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| 351 | void gl2psAddIndex(GLshort *index0, GLshort *index1, GLshort *nb, |
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| 352 | GLshort i, GLshort j){ |
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| 353 | GLint k; |
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| 354 | |
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| 355 | for(k = 0; k < *nb; k++){ |
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| 356 | if((index0[k] == i && index1[k] == j) || |
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| 357 | (index1[k] == i && index0[k] == j)) return; |
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| 358 | } |
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| 359 | index0[*nb] = i; |
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| 360 | index1[*nb] = j; |
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| 361 | (*nb)++; |
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| 362 | } |
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| 363 | |
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| 364 | GLshort gl2psGetIndex(GLshort i, GLshort num){ |
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| 365 | return(i < num-1) ? i+1 : 0; |
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| 366 | } |
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| 367 | |
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| 368 | GLint gl2psTestSplitPrimitive(GL2PSprimitive *prim, GL2PSplane plane){ |
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| 369 | GLint type = GL2PS_COINCIDENT; |
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| 370 | GLshort i, j; |
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| 371 | GLfloat d[5]; |
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| 372 | |
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| 373 | for(i = 0; i < prim->numverts; i++){ |
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| 374 | d[i] = gl2psComparePointPlane(prim->verts[i].xyz, plane); |
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| 375 | } |
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| 376 | |
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| 377 | if(prim->numverts < 2){ |
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| 378 | return 0; |
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| 379 | } |
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| 380 | else{ |
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| 381 | for(i = 0; i < prim->numverts; i++){ |
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| 382 | j = gl2psGetIndex(i, prim->numverts); |
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| 383 | if(d[j] > GL2PS_EPSILON){ |
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| 384 | if(type == GL2PS_COINCIDENT) type = GL2PS_IN_BACK_OF; |
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| 385 | else if(type != GL2PS_IN_BACK_OF) return 1; |
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| 386 | if(d[i] < -GL2PS_EPSILON) return 1; |
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| 387 | } |
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| 388 | else if(d[j] < -GL2PS_EPSILON){ |
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| 389 | if(type == GL2PS_COINCIDENT) type = GL2PS_IN_FRONT_OF; |
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| 390 | else if(type != GL2PS_IN_FRONT_OF) return 1; |
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| 391 | if(d[i] > GL2PS_EPSILON) return 1; |
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| 392 | } |
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| 393 | } |
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| 394 | } |
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| 395 | return 0; |
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| 396 | } |
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| 397 | |
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| 398 | GLint gl2psSplitPrimitive(GL2PSprimitive *prim, GL2PSplane plane, |
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| 399 | GL2PSprimitive **front, GL2PSprimitive **back){ |
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| 400 | GLshort i, j, in=0, out=0, in0[5], in1[5], out0[5], out1[5]; |
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| 401 | GLint type; |
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| 402 | GLfloat d[5]; |
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| 403 | |
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| 404 | type = GL2PS_COINCIDENT; |
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| 405 | |
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| 406 | for(i = 0; i < prim->numverts; i++){ |
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| 407 | d[i] = gl2psComparePointPlane(prim->verts[i].xyz, plane); |
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| 408 | } |
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| 409 | |
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| 410 | switch(prim->type){ |
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| 411 | case GL2PS_POINT : |
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| 412 | if(d[0] > GL2PS_EPSILON) type = GL2PS_IN_BACK_OF; |
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| 413 | else if(d[0] < -GL2PS_EPSILON) type = GL2PS_IN_FRONT_OF; |
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| 414 | else type = GL2PS_COINCIDENT; |
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| 415 | break; |
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| 416 | default : |
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| 417 | for(i = 0; i < prim->numverts; i++){ |
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| 418 | j = gl2psGetIndex(i, prim->numverts); |
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| 419 | if(d[j] > GL2PS_EPSILON){ |
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| 420 | if(type == GL2PS_COINCIDENT) type = GL2PS_IN_BACK_OF; |
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| 421 | else if(type != GL2PS_IN_BACK_OF) type = GL2PS_SPANNING; |
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| 422 | if(d[i] < -GL2PS_EPSILON){ |
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| 423 | gl2psAddIndex(in0, in1, &in, i, j); |
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| 424 | gl2psAddIndex(out0, out1, &out, i, j); |
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| 425 | type = GL2PS_SPANNING; |
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| 426 | } |
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| 427 | gl2psAddIndex(out0, out1, &out, j, -1); |
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| 428 | } |
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| 429 | else if(d[j] < -GL2PS_EPSILON){ |
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| 430 | if(type == GL2PS_COINCIDENT) type = GL2PS_IN_FRONT_OF; |
---|
| 431 | else if(type != GL2PS_IN_FRONT_OF) type = GL2PS_SPANNING; |
---|
| 432 | if(d[i] > GL2PS_EPSILON){ |
---|
| 433 | gl2psAddIndex(in0, in1, &in, i, j); |
---|
| 434 | gl2psAddIndex(out0, out1, &out, i, j); |
---|
| 435 | type = GL2PS_SPANNING; |
---|
| 436 | } |
---|
| 437 | gl2psAddIndex(in0, in1, &in, j, -1); |
---|
| 438 | } |
---|
| 439 | else{ |
---|
| 440 | gl2psAddIndex(in0, in1, &in, j, -1); |
---|
| 441 | gl2psAddIndex(out0, out1, &out, j, -1); |
---|
| 442 | } |
---|
| 443 | } |
---|
| 444 | break; |
---|
| 445 | } |
---|
| 446 | |
---|
| 447 | if(type == GL2PS_SPANNING){ |
---|
| 448 | *back = (GL2PSprimitive*)gl2psMalloc(sizeof(GL2PSprimitive)); |
---|
| 449 | *front = (GL2PSprimitive*)gl2psMalloc(sizeof(GL2PSprimitive)); |
---|
| 450 | gl2psCreateSplitPrimitive(prim, plane, *back, out, out0, out1); |
---|
| 451 | gl2psCreateSplitPrimitive(prim, plane, *front, in, in0, in1); |
---|
| 452 | } |
---|
| 453 | |
---|
| 454 | return type; |
---|
| 455 | } |
---|
| 456 | |
---|
| 457 | void gl2psDivideQuad(GL2PSprimitive *quad, |
---|
| 458 | GL2PSprimitive **t1, GL2PSprimitive **t2){ |
---|
| 459 | *t1 = (GL2PSprimitive*)gl2psMalloc(sizeof(GL2PSprimitive)); |
---|
| 460 | *t2 = (GL2PSprimitive*)gl2psMalloc(sizeof(GL2PSprimitive)); |
---|
| 461 | (*t1)->type = (*t2)->type = GL2PS_TRIANGLE; |
---|
| 462 | (*t1)->numverts = (*t2)->numverts = 3; |
---|
| 463 | (*t1)->depth = (*t2)->depth = quad->depth; |
---|
| 464 | (*t1)->culled = (*t2)->culled = quad->culled; |
---|
| 465 | (*t1)->dash = (*t2)->dash = quad->dash; |
---|
| 466 | (*t1)->width = (*t2)->width = quad->width; |
---|
| 467 | (*t1)->verts = (GL2PSvertex *)gl2psMalloc(3 * sizeof(GL2PSvertex)); |
---|
| 468 | (*t2)->verts = (GL2PSvertex *)gl2psMalloc(3 * sizeof(GL2PSvertex)); |
---|
| 469 | (*t1)->verts[0] = quad->verts[0]; |
---|
| 470 | (*t1)->verts[1] = quad->verts[1]; |
---|
| 471 | (*t1)->verts[2] = quad->verts[2]; |
---|
| 472 | (*t1)->boundary = ((quad->boundary & 1) ? 1 : 0) | ((quad->boundary & 2) ? 2 : 0); |
---|
| 473 | (*t2)->verts[0] = quad->verts[0]; |
---|
| 474 | (*t2)->verts[1] = quad->verts[2]; |
---|
| 475 | (*t2)->verts[2] = quad->verts[3]; |
---|
| 476 | (*t1)->boundary = ((quad->boundary & 4) ? 2 : 0) | ((quad->boundary & 4) ? 2 : 0); |
---|
| 477 | } |
---|
| 478 | |
---|
| 479 | int gl2psCompareDepth(const void *a, const void *b){ |
---|
| 480 | GL2PSprimitive *q, *w; |
---|
| 481 | GLfloat diff; |
---|
| 482 | |
---|
| 483 | q = *(GL2PSprimitive**)a; |
---|
| 484 | w = *(GL2PSprimitive**)b; |
---|
| 485 | diff = q->depth - w->depth; |
---|
| 486 | if(diff > 0.){ |
---|
| 487 | return 1; |
---|
| 488 | } |
---|
| 489 | else if(diff < 0.){ |
---|
| 490 | return -1; |
---|
| 491 | } |
---|
| 492 | else{ |
---|
| 493 | return 0; |
---|
| 494 | } |
---|
| 495 | } |
---|
| 496 | |
---|
| 497 | int gl2psTrianglesFirst(const void *a, const void *b){ |
---|
| 498 | GL2PSprimitive *q, *w; |
---|
| 499 | |
---|
| 500 | q = *(GL2PSprimitive**)a; |
---|
| 501 | w = *(GL2PSprimitive**)b; |
---|
| 502 | return(q->type < w->type ? 1 : -1); |
---|
| 503 | } |
---|
| 504 | |
---|
| 505 | GLint gl2psFindRoot(GL2PSlist *primitives, GL2PSprimitive **root){ |
---|
| 506 | GLint i, j, count, best = 1000000, index = 0; |
---|
| 507 | GL2PSprimitive *prim1, *prim2; |
---|
| 508 | GL2PSplane plane; |
---|
| 509 | GLint maxp; |
---|
| 510 | |
---|
| 511 | if(gl2ps->options & GL2PS_BEST_ROOT){ |
---|
| 512 | *root = *(GL2PSprimitive**)gl2psListPointer(primitives, 0); |
---|
| 513 | maxp = gl2psListNbr(primitives); |
---|
| 514 | if(maxp > gl2ps->maxbestroot){ |
---|
| 515 | maxp = gl2ps->maxbestroot; |
---|
| 516 | } |
---|
| 517 | for(i = 0; i < maxp; i++){ |
---|
| 518 | prim1 = *(GL2PSprimitive**)gl2psListPointer(primitives, i); |
---|
| 519 | gl2psGetPlane(prim1, plane); |
---|
| 520 | count = 0; |
---|
| 521 | for(j = 0; j < gl2psListNbr(primitives); j++){ |
---|
| 522 | if(j != i){ |
---|
| 523 | prim2 = *(GL2PSprimitive**)gl2psListPointer(primitives, j); |
---|
| 524 | count += gl2psTestSplitPrimitive(prim2, plane); |
---|
| 525 | } |
---|
| 526 | if(count > best) break; |
---|
| 527 | } |
---|
| 528 | if(count < best){ |
---|
| 529 | best = count; |
---|
| 530 | index = i; |
---|
| 531 | *root = prim1; |
---|
| 532 | if(!count) return index; |
---|
| 533 | } |
---|
| 534 | } |
---|
| 535 | /* if(index) gl2psMsg(GL2PS_INFO, "GL2PS_BEST_ROOT was worth it: %d", index); */ |
---|
| 536 | return index; |
---|
| 537 | } |
---|
| 538 | else{ |
---|
| 539 | *root = *(GL2PSprimitive**)gl2psListPointer(primitives, 0); |
---|
| 540 | return 0; |
---|
| 541 | } |
---|
| 542 | } |
---|
| 543 | |
---|
| 544 | void gl2psFreePrimitive(void *a, void *){ |
---|
| 545 | GL2PSprimitive *q; |
---|
| 546 | |
---|
| 547 | q = *(GL2PSprimitive**)a; |
---|
| 548 | gl2psFree(q->verts); |
---|
| 549 | if(q->type == GL2PS_TEXT){ |
---|
| 550 | gl2psFree(q->text->str); |
---|
| 551 | gl2psFree(q->text->fontname); |
---|
| 552 | gl2psFree(q->text); |
---|
| 553 | } |
---|
| 554 | if(q->type == GL2PS_PIXMAP){ |
---|
| 555 | gl2psFree(q->image->pixels); |
---|
| 556 | gl2psFree(q->image); |
---|
| 557 | } |
---|
| 558 | gl2psFree(q); |
---|
| 559 | } |
---|
| 560 | |
---|
| 561 | void gl2psAddPrimitiveInList(GL2PSprimitive *prim, GL2PSlist *list){ |
---|
| 562 | GL2PSprimitive *t1, *t2; |
---|
| 563 | |
---|
| 564 | if(prim->type != GL2PS_QUADRANGLE){ |
---|
| 565 | gl2psListAdd(list, &prim); |
---|
| 566 | } |
---|
| 567 | else{ |
---|
| 568 | gl2psDivideQuad(prim, &t1, &t2); |
---|
| 569 | gl2psListAdd(list, &t1); |
---|
| 570 | gl2psListAdd(list, &t2); |
---|
| 571 | gl2psFreePrimitive(&prim, NULL); |
---|
| 572 | } |
---|
| 573 | |
---|
| 574 | } |
---|
| 575 | |
---|
| 576 | void gl2psFreeBspTree(GL2PSbsptree **tree){ |
---|
| 577 | if(*tree){ |
---|
| 578 | if((*tree)->back) gl2psFreeBspTree(&(*tree)->back); |
---|
| 579 | if((*tree)->primitives){ |
---|
| 580 | gl2psListAction((*tree)->primitives, gl2psFreePrimitive); |
---|
| 581 | gl2psListDelete((*tree)->primitives); |
---|
| 582 | } |
---|
| 583 | if((*tree)->front) gl2psFreeBspTree(&(*tree)->front); |
---|
| 584 | gl2psFree(*tree); |
---|
| 585 | *tree = NULL; |
---|
| 586 | } |
---|
| 587 | } |
---|
| 588 | |
---|
| 589 | GLboolean gl2psGreater(GLfloat f1, GLfloat f2){ |
---|
| 590 | if(f1 > f2) return 1; |
---|
| 591 | else return 0; |
---|
| 592 | } |
---|
| 593 | |
---|
| 594 | GLboolean gl2psLess(GLfloat f1, GLfloat f2){ |
---|
| 595 | if(f1 < f2) return 1; |
---|
| 596 | else return 0; |
---|
| 597 | } |
---|
| 598 | |
---|
| 599 | void gl2psBuildBspTree(GL2PSbsptree *tree, GL2PSlist *primitives){ |
---|
| 600 | GL2PSprimitive *prim, *frontprim, *backprim; |
---|
| 601 | GL2PSlist *frontlist, *backlist; |
---|
| 602 | GLint i, index; |
---|
| 603 | |
---|
| 604 | tree->front = NULL; |
---|
| 605 | tree->back = NULL; |
---|
| 606 | tree->primitives = gl2psListCreate(1, 2, sizeof(GL2PSprimitive*)); |
---|
| 607 | index = gl2psFindRoot(primitives, &prim); |
---|
| 608 | gl2psGetPlane(prim, tree->plane); |
---|
| 609 | gl2psAddPrimitiveInList(prim, tree->primitives); |
---|
| 610 | |
---|
| 611 | frontlist = gl2psListCreate(1, 2, sizeof(GL2PSprimitive*)); |
---|
| 612 | backlist = gl2psListCreate(1, 2, sizeof(GL2PSprimitive*)); |
---|
| 613 | |
---|
| 614 | for(i = 0; i < gl2psListNbr(primitives); i++){ |
---|
| 615 | if(i != index){ |
---|
| 616 | prim = *(GL2PSprimitive**)gl2psListPointer(primitives,i); |
---|
| 617 | switch(gl2psSplitPrimitive(prim, tree->plane, &frontprim, &backprim)){ |
---|
| 618 | case GL2PS_COINCIDENT: |
---|
| 619 | gl2psAddPrimitiveInList(prim, tree->primitives); |
---|
| 620 | break; |
---|
| 621 | case GL2PS_IN_BACK_OF: |
---|
| 622 | gl2psAddPrimitiveInList(prim, backlist); |
---|
| 623 | break; |
---|
| 624 | case GL2PS_IN_FRONT_OF: |
---|
| 625 | gl2psAddPrimitiveInList(prim, frontlist); |
---|
| 626 | break; |
---|
| 627 | case GL2PS_SPANNING: |
---|
| 628 | gl2psAddPrimitiveInList(backprim, backlist); |
---|
| 629 | gl2psAddPrimitiveInList(frontprim, frontlist); |
---|
| 630 | gl2psFreePrimitive(&prim, NULL); |
---|
| 631 | break; |
---|
| 632 | } |
---|
| 633 | } |
---|
| 634 | } |
---|
| 635 | |
---|
| 636 | if(gl2psListNbr(tree->primitives)){ |
---|
| 637 | gl2psListSort(tree->primitives, gl2psTrianglesFirst); |
---|
| 638 | } |
---|
| 639 | |
---|
| 640 | if(gl2psListNbr(frontlist)){ |
---|
| 641 | gl2psListSort(frontlist, gl2psTrianglesFirst); |
---|
| 642 | tree->front = (GL2PSbsptree*)gl2psMalloc(sizeof(GL2PSbsptree)); |
---|
| 643 | gl2psBuildBspTree(tree->front, frontlist); |
---|
| 644 | } |
---|
| 645 | else{ |
---|
| 646 | gl2psListDelete(frontlist); |
---|
| 647 | } |
---|
| 648 | |
---|
| 649 | if(gl2psListNbr(backlist)){ |
---|
| 650 | gl2psListSort(backlist, gl2psTrianglesFirst); |
---|
| 651 | tree->back = (GL2PSbsptree*)gl2psMalloc(sizeof(GL2PSbsptree)); |
---|
| 652 | gl2psBuildBspTree(tree->back, backlist); |
---|
| 653 | } |
---|
| 654 | else{ |
---|
| 655 | gl2psListDelete(backlist); |
---|
| 656 | } |
---|
| 657 | |
---|
| 658 | gl2psListDelete(primitives); |
---|
| 659 | } |
---|
| 660 | |
---|
| 661 | void gl2psTraverseBspTree(GL2PSbsptree *tree, GL2PSxyz eye, GLfloat epsilon, |
---|
| 662 | GLboolean (*compare)(GLfloat f1, GLfloat f2), |
---|
| 663 | void (*action)(void *data, void *dummy)){ |
---|
| 664 | GLfloat result; |
---|
| 665 | |
---|
| 666 | if(!tree) return; |
---|
| 667 | |
---|
| 668 | result = gl2psComparePointPlane(eye, tree->plane); |
---|
| 669 | |
---|
| 670 | if(compare(result, epsilon)){ |
---|
| 671 | gl2psTraverseBspTree(tree->back, eye, epsilon, compare, action); |
---|
| 672 | gl2psListAction(tree->primitives, action); |
---|
| 673 | gl2psTraverseBspTree(tree->front, eye, epsilon, compare, action); |
---|
| 674 | } |
---|
| 675 | else if(compare(-epsilon, result)){ |
---|
| 676 | gl2psTraverseBspTree(tree->front, eye, epsilon, compare, action); |
---|
| 677 | gl2psListAction(tree->primitives, action); |
---|
| 678 | gl2psTraverseBspTree(tree->back, eye, epsilon, compare, action); |
---|
| 679 | } |
---|
| 680 | else{ |
---|
| 681 | gl2psTraverseBspTree(tree->front, eye, epsilon, compare, action); |
---|
| 682 | gl2psTraverseBspTree(tree->back, eye, epsilon, compare, action); |
---|
| 683 | } |
---|
| 684 | } |
---|
| 685 | |
---|
| 686 | /* The 2D sorting routines (for occlusion culling) */ |
---|
| 687 | |
---|
| 688 | GLint gl2psGetPlaneFromPoints(GL2PSxyz a, GL2PSxyz b, GL2PSplane plane){ |
---|
| 689 | GLfloat n; |
---|
| 690 | |
---|
| 691 | plane[0] = b[1] - a[1]; |
---|
| 692 | plane[1] = a[0] - b[0]; |
---|
| 693 | n = std::sqrt(plane[0]*plane[0] + plane[1]*plane[1]); |
---|
| 694 | plane[2]=0.; |
---|
| 695 | if(n != 0.){ |
---|
| 696 | plane[0] /= n; |
---|
| 697 | plane[1] /= n; |
---|
| 698 | plane[3] = -plane[0]*a[0]-plane[1]*a[1]; |
---|
| 699 | return 1; |
---|
| 700 | } |
---|
| 701 | else{ |
---|
| 702 | plane[0] = -1.0; |
---|
| 703 | plane[1] = 0.; |
---|
| 704 | plane[3] = a[0]; |
---|
| 705 | return 0; |
---|
| 706 | } |
---|
| 707 | } |
---|
| 708 | |
---|
| 709 | void gl2psFreeBspImageTree(GL2PSbsptree2d **tree){ |
---|
| 710 | if(*tree){ |
---|
| 711 | if((*tree)->back) gl2psFreeBspImageTree(&(*tree)->back); |
---|
| 712 | if((*tree)->front) gl2psFreeBspImageTree(&(*tree)->front); |
---|
| 713 | gl2psFree(*tree); |
---|
| 714 | *tree = NULL; |
---|
| 715 | } |
---|
| 716 | } |
---|
| 717 | |
---|
| 718 | GLint gl2psCheckPoint(GL2PSxyz point, GL2PSplane plane){ |
---|
| 719 | GLfloat pt_dis; |
---|
| 720 | |
---|
| 721 | pt_dis = gl2psComparePointPlane(point, plane); |
---|
| 722 | if(pt_dis > GL2PS_EPSILON) return GL2PS_POINT_INFRONT; |
---|
| 723 | else if(pt_dis < -GL2PS_EPSILON) return GL2PS_POINT_BACK; |
---|
| 724 | else return GL2PS_POINT_COINCIDENT; |
---|
| 725 | } |
---|
| 726 | |
---|
| 727 | void gl2psAddPlanesInBspTreeImage(GL2PSprimitive *prim, |
---|
| 728 | GL2PSbsptree2d **tree){ |
---|
| 729 | GLint ret = 0; |
---|
| 730 | GLint i; |
---|
| 731 | GLint offset = 0; |
---|
| 732 | GL2PSbsptree2d *head = NULL, *cur = NULL; |
---|
| 733 | |
---|
| 734 | if((*tree == NULL) && (prim->numverts > 2)){ |
---|
| 735 | head = (GL2PSbsptree2d*)gl2psMalloc(sizeof(GL2PSbsptree2d)); |
---|
| 736 | for(i = 0; i < prim->numverts-1; i++){ |
---|
| 737 | if(!gl2psGetPlaneFromPoints(prim->verts[i].xyz, |
---|
| 738 | prim->verts[i+1].xyz, |
---|
| 739 | head->plane)){ |
---|
| 740 | if(prim->numverts-i > 3){ |
---|
| 741 | offset++; |
---|
| 742 | } |
---|
| 743 | else{ |
---|
| 744 | gl2psFree(head); |
---|
| 745 | return; |
---|
| 746 | } |
---|
| 747 | } |
---|
| 748 | else{ |
---|
| 749 | break; |
---|
| 750 | } |
---|
| 751 | } |
---|
| 752 | head->back = NULL; |
---|
| 753 | head->front = NULL; |
---|
| 754 | for(i = 2+offset; i < prim->numverts; i++){ |
---|
| 755 | ret = gl2psCheckPoint(prim->verts[i].xyz, head->plane); |
---|
| 756 | if(ret != GL2PS_POINT_COINCIDENT) break; |
---|
| 757 | } |
---|
| 758 | switch(ret){ |
---|
| 759 | case GL2PS_POINT_INFRONT : |
---|
| 760 | cur = head; |
---|
| 761 | for(i = 1+offset; i < prim->numverts-1; i++){ |
---|
| 762 | if(cur->front == NULL){ |
---|
| 763 | cur->front = (GL2PSbsptree2d*)gl2psMalloc(sizeof(GL2PSbsptree2d)); |
---|
| 764 | } |
---|
| 765 | if(gl2psGetPlaneFromPoints(prim->verts[i].xyz, |
---|
| 766 | prim->verts[i+1].xyz, |
---|
| 767 | cur->front->plane)){ |
---|
| 768 | cur = cur->front; |
---|
| 769 | cur->front = NULL; |
---|
| 770 | cur->back = NULL; |
---|
| 771 | } |
---|
| 772 | } |
---|
| 773 | if(cur->front == NULL){ |
---|
| 774 | cur->front = (GL2PSbsptree2d*)gl2psMalloc(sizeof(GL2PSbsptree2d)); |
---|
| 775 | } |
---|
| 776 | if(gl2psGetPlaneFromPoints(prim->verts[i].xyz, |
---|
| 777 | prim->verts[offset].xyz, |
---|
| 778 | cur->front->plane)){ |
---|
| 779 | cur->front->front = NULL; |
---|
| 780 | cur->front->back = NULL; |
---|
| 781 | } |
---|
| 782 | else{ |
---|
| 783 | gl2psFree(cur->front); |
---|
| 784 | cur->front = NULL; |
---|
| 785 | } |
---|
| 786 | break; |
---|
| 787 | case GL2PS_POINT_BACK : |
---|
| 788 | for(i = 0; i < 4; i++){ |
---|
| 789 | head->plane[i] = -head->plane[i]; |
---|
| 790 | } |
---|
| 791 | cur = head; |
---|
| 792 | for(i = 1+offset; i < prim->numverts-1; i++){ |
---|
| 793 | if(cur->front == NULL){ |
---|
| 794 | cur->front = (GL2PSbsptree2d*)gl2psMalloc(sizeof(GL2PSbsptree2d)); |
---|
| 795 | } |
---|
| 796 | if(gl2psGetPlaneFromPoints(prim->verts[i+1].xyz, |
---|
| 797 | prim->verts[i].xyz, |
---|
| 798 | cur->front->plane)){ |
---|
| 799 | cur = cur->front; |
---|
| 800 | cur->front = NULL; |
---|
| 801 | cur->back = NULL; |
---|
| 802 | } |
---|
| 803 | } |
---|
| 804 | if(cur->front == NULL){ |
---|
| 805 | cur->front = (GL2PSbsptree2d*)gl2psMalloc(sizeof(GL2PSbsptree2d)); |
---|
| 806 | } |
---|
| 807 | if(gl2psGetPlaneFromPoints(prim->verts[offset].xyz, |
---|
| 808 | prim->verts[i].xyz, |
---|
| 809 | cur->front->plane)){ |
---|
| 810 | cur->front->front = NULL; |
---|
| 811 | cur->front->back = NULL; |
---|
| 812 | } |
---|
| 813 | else{ |
---|
| 814 | gl2psFree(cur->front); |
---|
| 815 | cur->front = NULL; |
---|
| 816 | } |
---|
| 817 | break; |
---|
| 818 | default: |
---|
| 819 | gl2psFree(head); |
---|
| 820 | return; |
---|
| 821 | } |
---|
| 822 | (*tree) = head; |
---|
| 823 | } |
---|
| 824 | } |
---|
| 825 | |
---|
| 826 | GLint gl2psCheckPrimitive(GL2PSprimitive *prim, GL2PSplane plane){ |
---|
| 827 | GLint i; |
---|
| 828 | GLint pos; |
---|
| 829 | |
---|
| 830 | pos = gl2psCheckPoint(prim->verts[0].xyz, plane); |
---|
| 831 | for(i = 1; i < prim->numverts; i++){ |
---|
| 832 | pos |= gl2psCheckPoint(prim->verts[i].xyz, plane); |
---|
| 833 | if(pos == (GL2PS_POINT_INFRONT | GL2PS_POINT_BACK)) return GL2PS_SPANNING; |
---|
| 834 | } |
---|
| 835 | if(pos & GL2PS_POINT_INFRONT) return GL2PS_IN_FRONT_OF; |
---|
| 836 | else if(pos & GL2PS_POINT_BACK) return GL2PS_IN_BACK_OF; |
---|
| 837 | else return GL2PS_COINCIDENT; |
---|
| 838 | } |
---|
| 839 | |
---|
| 840 | GL2PSprimitive* gl2psCreateSplitPrimitive2D(GL2PSprimitive *parent, |
---|
| 841 | GLshort numverts, |
---|
| 842 | GL2PSvertex *vertx){ |
---|
| 843 | GLint i; |
---|
| 844 | GL2PSprimitive *child = (GL2PSprimitive*)gl2psMalloc(sizeof(GL2PSprimitive)); |
---|
| 845 | |
---|
| 846 | switch(numverts){ |
---|
| 847 | case 1 : child->type = GL2PS_POINT; break; |
---|
| 848 | case 2 : child->type = GL2PS_LINE; break; |
---|
| 849 | case 3 : child->type = GL2PS_TRIANGLE; break; |
---|
| 850 | case 4 : child->type = GL2PS_QUADRANGLE; break; |
---|
| 851 | } |
---|
| 852 | child->boundary = 0; /* not done! */ |
---|
| 853 | child->depth = parent->depth; |
---|
| 854 | child->culled = parent->culled; |
---|
| 855 | child->dash = parent->dash; |
---|
| 856 | child->width = parent->width; |
---|
| 857 | child->numverts = numverts; |
---|
| 858 | child->verts = (GL2PSvertex *)gl2psMalloc(numverts * sizeof(GL2PSvertex)); |
---|
| 859 | for(i = 0; i < numverts; i++){ |
---|
| 860 | child->verts[i] = vertx[i]; |
---|
| 861 | } |
---|
| 862 | return child; |
---|
| 863 | } |
---|
| 864 | |
---|
| 865 | void gl2psSplitPrimitive2D(GL2PSprimitive *prim, |
---|
| 866 | GL2PSplane plane, |
---|
| 867 | GL2PSprimitive **front, |
---|
| 868 | GL2PSprimitive **back){ |
---|
| 869 | |
---|
| 870 | /* cur will hold the position of current vertex |
---|
| 871 | prev will holds the position of previous vertex |
---|
| 872 | prev0 will holds the position of vertex number 0 |
---|
| 873 | v1 and v2 represent the current and previous vertexs respectively |
---|
| 874 | flag will represents that should the current be checked against the plane */ |
---|
| 875 | GLint cur = -1, prev = -1, i, v1 = 0, v2 = 0, flag = 1, prev0 = -1; |
---|
| 876 | |
---|
| 877 | /* list of vertexs which will go in front and back Primitive */ |
---|
| 878 | GL2PSvertex *front_list = NULL, *back_list = NULL; |
---|
| 879 | |
---|
| 880 | /* number of vertex in front and back list */ |
---|
| 881 | GLint front_count = 0, back_count = 0; |
---|
| 882 | |
---|
| 883 | for(i = 0; i <= prim->numverts; i++){ |
---|
| 884 | v1 = i; |
---|
| 885 | if(v1 == prim->numverts){ |
---|
| 886 | if(prim->numverts < 3) break; |
---|
| 887 | v1 = 0; |
---|
| 888 | v2 = prim->numverts-1; |
---|
| 889 | cur = prev0; |
---|
| 890 | } |
---|
| 891 | else if(flag){ |
---|
| 892 | cur = gl2psCheckPoint(prim->verts[v1].xyz, plane); |
---|
| 893 | if(i == 0){ |
---|
| 894 | prev0 = cur; |
---|
| 895 | } |
---|
| 896 | } |
---|
| 897 | if(((prev == -1) || (prev == cur) || (prev == 0) || (cur == 0)) && |
---|
| 898 | (i < prim->numverts)){ |
---|
| 899 | if(cur == GL2PS_POINT_INFRONT){ |
---|
| 900 | front_count++; |
---|
| 901 | front_list = (GL2PSvertex*)gl2psRealloc(front_list, |
---|
| 902 | sizeof(GL2PSvertex)*front_count); |
---|
| 903 | front_list[front_count-1] = prim->verts[v1]; |
---|
| 904 | } |
---|
| 905 | else if(cur == GL2PS_POINT_BACK){ |
---|
| 906 | back_count++; |
---|
| 907 | back_list = (GL2PSvertex*)gl2psRealloc(back_list, |
---|
| 908 | sizeof(GL2PSvertex)*back_count); |
---|
| 909 | back_list[back_count-1] = prim->verts[v1]; |
---|
| 910 | } |
---|
| 911 | else{ |
---|
| 912 | front_count++; |
---|
| 913 | front_list = (GL2PSvertex*)gl2psRealloc(front_list, |
---|
| 914 | sizeof(GL2PSvertex)*front_count); |
---|
| 915 | front_list[front_count-1] = prim->verts[v1]; |
---|
| 916 | back_count++; |
---|
| 917 | back_list = (GL2PSvertex*)gl2psRealloc(back_list, |
---|
| 918 | sizeof(GL2PSvertex)*back_count); |
---|
| 919 | back_list[back_count-1] = prim->verts[v1]; |
---|
| 920 | } |
---|
| 921 | flag = 1; |
---|
| 922 | } |
---|
| 923 | else if((prev != cur) && (cur != 0) && (prev != 0)){ |
---|
| 924 | if(v1 != 0){ |
---|
| 925 | v2 = v1-1; |
---|
| 926 | i--; |
---|
| 927 | } |
---|
| 928 | front_count++; |
---|
| 929 | front_list = (GL2PSvertex*)gl2psRealloc(front_list, |
---|
| 930 | sizeof(GL2PSvertex)*front_count); |
---|
| 931 | gl2psCutEdge(&prim->verts[v2], |
---|
| 932 | &prim->verts[v1], |
---|
| 933 | plane, |
---|
| 934 | &front_list[front_count-1]); |
---|
| 935 | back_count++; |
---|
| 936 | back_list = (GL2PSvertex*)gl2psRealloc(back_list, |
---|
| 937 | sizeof(GL2PSvertex)*back_count); |
---|
| 938 | back_list[back_count-1] = front_list[front_count-1]; |
---|
| 939 | flag = 0; |
---|
| 940 | } |
---|
| 941 | prev = cur; |
---|
| 942 | } |
---|
| 943 | *front = gl2psCreateSplitPrimitive2D(prim, front_count, front_list); |
---|
| 944 | *back = gl2psCreateSplitPrimitive2D(prim, back_count, back_list); |
---|
| 945 | gl2psFree(front_list); |
---|
| 946 | gl2psFree(back_list); |
---|
| 947 | } |
---|
| 948 | |
---|
| 949 | GLint gl2psAddInBspImageTree(GL2PSprimitive *prim, GL2PSbsptree2d **tree){ |
---|
| 950 | GLint ret = 0; |
---|
| 951 | GL2PSprimitive *frontprim = NULL, *backprim = NULL; |
---|
| 952 | |
---|
| 953 | if(*tree == NULL){ |
---|
| 954 | gl2psAddPlanesInBspTreeImage(prim, tree); |
---|
| 955 | return 1; |
---|
| 956 | } |
---|
| 957 | else{ |
---|
| 958 | switch(gl2psCheckPrimitive(prim, (*tree)->plane)){ |
---|
| 959 | case GL2PS_IN_BACK_OF: return gl2psAddInBspImageTree(prim, &(*tree)->back); |
---|
| 960 | case GL2PS_IN_FRONT_OF: |
---|
| 961 | if((*tree)->front != NULL) return gl2psAddInBspImageTree(prim, &(*tree)->front); |
---|
| 962 | else return 0; |
---|
| 963 | case GL2PS_SPANNING: |
---|
| 964 | gl2psSplitPrimitive2D(prim, (*tree)->plane, &frontprim, &backprim); |
---|
| 965 | ret = gl2psAddInBspImageTree(backprim, &(*tree)->back); |
---|
| 966 | if((*tree)->front != NULL){ |
---|
| 967 | if(gl2psAddInBspImageTree(frontprim, &(*tree)->front)){ |
---|
| 968 | ret = 1; |
---|
| 969 | } |
---|
| 970 | } |
---|
| 971 | gl2psFree(frontprim->verts); |
---|
| 972 | gl2psFree(frontprim); |
---|
| 973 | gl2psFree(backprim->verts); |
---|
| 974 | gl2psFree(backprim); |
---|
| 975 | return ret; |
---|
| 976 | case GL2PS_COINCIDENT: |
---|
| 977 | if(prim->numverts < 3) return 1; |
---|
| 978 | else return 0; |
---|
| 979 | } |
---|
| 980 | } |
---|
| 981 | return 0; |
---|
| 982 | } |
---|
| 983 | |
---|
| 984 | void gl2psAddInImageTree(void *a, void *){ |
---|
| 985 | GL2PSprimitive *prim = *(GL2PSprimitive **)a; |
---|
| 986 | |
---|
| 987 | if(!gl2psAddInBspImageTree(prim, &gl2ps->imagetree)){ |
---|
| 988 | prim->culled = 1; |
---|
| 989 | } |
---|
| 990 | } |
---|
| 991 | |
---|
| 992 | /* Boundary contruction */ |
---|
| 993 | |
---|
| 994 | void gl2psAddBoundaryInList(GL2PSprimitive *prim, GL2PSlist *list){ |
---|
| 995 | GL2PSprimitive *b; |
---|
| 996 | GLshort i; |
---|
| 997 | GL2PSxyz c; |
---|
| 998 | |
---|
| 999 | c[0] = c[1] = c[2] = 0.; |
---|
| 1000 | for(i = 0; i < prim->numverts; i++){ |
---|
| 1001 | c[0] += prim->verts[i].xyz[0]; |
---|
| 1002 | c[1] += prim->verts[i].xyz[1]; |
---|
| 1003 | } |
---|
| 1004 | c[0] /= prim->numverts; |
---|
| 1005 | c[1] /= prim->numverts; |
---|
| 1006 | |
---|
| 1007 | for(i = 0; i < prim->numverts; i++){ |
---|
| 1008 | if(prim->boundary & (GLint)pow(2., i)){ |
---|
| 1009 | b = (GL2PSprimitive*)gl2psMalloc(sizeof(GL2PSprimitive)); |
---|
| 1010 | b->type = GL2PS_LINE; |
---|
| 1011 | b->dash = prim->dash; |
---|
| 1012 | b->depth = prim->depth; /* this is wrong */ |
---|
| 1013 | b->culled = prim->culled; |
---|
| 1014 | b->width = prim->width; |
---|
| 1015 | b->boundary = 0; |
---|
| 1016 | b->numverts = 2; |
---|
| 1017 | b->verts = (GL2PSvertex *)gl2psMalloc(2 * sizeof(GL2PSvertex)); |
---|
| 1018 | |
---|
| 1019 | #if 0 /* need to work on boundary offset... */ |
---|
| 1020 | v[0] = c[0] - prim->verts[i].xyz[0]; |
---|
| 1021 | v[1] = c[1] - prim->verts[i].xyz[1]; |
---|
| 1022 | v[2] = 0.; |
---|
| 1023 | norm = gl2psNorm(v); |
---|
| 1024 | v[0] /= norm; |
---|
| 1025 | v[1] /= norm; |
---|
| 1026 | b->verts[0].xyz[0] = prim->verts[i].xyz[0] +0.1*v[0]; |
---|
| 1027 | b->verts[0].xyz[1] = prim->verts[i].xyz[1] +0.1*v[1]; |
---|
| 1028 | b->verts[0].xyz[2] = prim->verts[i].xyz[2]; |
---|
| 1029 | v[0] = c[0] - prim->verts[gl2psGetIndex(i, prim->numverts)].xyz[0]; |
---|
| 1030 | v[1] = c[1] - prim->verts[gl2psGetIndex(i, prim->numverts)].xyz[1]; |
---|
| 1031 | norm = gl2psNorm(v); |
---|
| 1032 | v[0] /= norm; |
---|
| 1033 | v[1] /= norm; |
---|
| 1034 | b->verts[1].xyz[0] = prim->verts[gl2psGetIndex(i, prim->numverts)].xyz[0] +0.1*v[0]; |
---|
| 1035 | b->verts[1].xyz[1] = prim->verts[gl2psGetIndex(i, prim->numverts)].xyz[1] +0.1*v[1]; |
---|
| 1036 | b->verts[1].xyz[2] = prim->verts[gl2psGetIndex(i, prim->numverts)].xyz[2]; |
---|
| 1037 | #else |
---|
| 1038 | b->verts[0].xyz[0] = prim->verts[i].xyz[0]; |
---|
| 1039 | b->verts[0].xyz[1] = prim->verts[i].xyz[1]; |
---|
| 1040 | b->verts[0].xyz[2] = prim->verts[i].xyz[2]; |
---|
| 1041 | b->verts[1].xyz[0] = prim->verts[gl2psGetIndex(i, prim->numverts)].xyz[0]; |
---|
| 1042 | b->verts[1].xyz[1] = prim->verts[gl2psGetIndex(i, prim->numverts)].xyz[1]; |
---|
| 1043 | b->verts[1].xyz[2] = prim->verts[gl2psGetIndex(i, prim->numverts)].xyz[2]; |
---|
| 1044 | #endif |
---|
| 1045 | |
---|
| 1046 | b->verts[0].rgba[0] = 0.; |
---|
| 1047 | b->verts[0].rgba[1] = 0.; |
---|
| 1048 | b->verts[0].rgba[2] = 0.; |
---|
| 1049 | b->verts[0].rgba[3] = 0.; |
---|
| 1050 | b->verts[1].rgba[0] = 0.; |
---|
| 1051 | b->verts[1].rgba[1] = 0.; |
---|
| 1052 | b->verts[1].rgba[2] = 0.; |
---|
| 1053 | b->verts[1].rgba[3] = 0.; |
---|
| 1054 | gl2psListAdd(list, &b); |
---|
| 1055 | } |
---|
| 1056 | } |
---|
| 1057 | |
---|
| 1058 | } |
---|
| 1059 | |
---|
| 1060 | void gl2psBuildPolygonBoundary(GL2PSbsptree *tree){ |
---|
| 1061 | GLint i, n; |
---|
| 1062 | GL2PSprimitive *prim; |
---|
| 1063 | |
---|
| 1064 | if(!tree) return; |
---|
| 1065 | gl2psBuildPolygonBoundary(tree->back); |
---|
| 1066 | n = gl2psListNbr(tree->primitives); |
---|
| 1067 | for(i = 0; i < n; i++){ |
---|
| 1068 | prim = *(GL2PSprimitive**)gl2psListPointer(tree->primitives, i); |
---|
| 1069 | if(prim->boundary) gl2psAddBoundaryInList(prim, tree->primitives); |
---|
| 1070 | } |
---|
| 1071 | gl2psBuildPolygonBoundary(tree->front); |
---|
| 1072 | } |
---|
| 1073 | |
---|
| 1074 | /* The feedback buffer parser */ |
---|
| 1075 | |
---|
| 1076 | void gl2psAddPolyPrimitive(GLshort type, GLshort numverts, |
---|
| 1077 | GL2PSvertex *verts, GLint offset, |
---|
| 1078 | char dash, GLfloat width, |
---|
| 1079 | char boundary){ |
---|
| 1080 | GLshort i; |
---|
| 1081 | GLfloat factor, units, area, dZ, dZdX, dZdY, maxdZ; |
---|
| 1082 | GL2PSprimitive *prim; |
---|
| 1083 | |
---|
| 1084 | prim = (GL2PSprimitive *)gl2psMalloc(sizeof(GL2PSprimitive)); |
---|
| 1085 | prim->type = type; |
---|
| 1086 | prim->numverts = numverts; |
---|
| 1087 | prim->verts = (GL2PSvertex *)gl2psMalloc(numverts * sizeof(GL2PSvertex)); |
---|
| 1088 | memcpy(prim->verts, verts, numverts * sizeof(GL2PSvertex)); |
---|
| 1089 | prim->boundary = boundary; |
---|
| 1090 | prim->dash = dash; |
---|
| 1091 | prim->width = width; |
---|
| 1092 | prim->culled = 0; |
---|
| 1093 | |
---|
| 1094 | if(gl2ps->options & GL2PS_SIMPLE_LINE_OFFSET){ |
---|
| 1095 | |
---|
| 1096 | if(type == GL2PS_LINE){ |
---|
| 1097 | if(gl2ps->sort == GL2PS_SIMPLE_SORT){ |
---|
| 1098 | prim->verts[0].xyz[2] -= GL2PS_SIMPLE_OFFSET_LARGE; |
---|
| 1099 | prim->verts[1].xyz[2] -= GL2PS_SIMPLE_OFFSET_LARGE; |
---|
| 1100 | } |
---|
| 1101 | else{ |
---|
| 1102 | prim->verts[0].xyz[2] -= GL2PS_SIMPLE_OFFSET; |
---|
| 1103 | prim->verts[1].xyz[2] -= GL2PS_SIMPLE_OFFSET; |
---|
| 1104 | } |
---|
| 1105 | } |
---|
| 1106 | |
---|
| 1107 | } |
---|
| 1108 | else if(offset && type == GL2PS_TRIANGLE){ |
---|
| 1109 | |
---|
| 1110 | /* This needs some more work... */ |
---|
| 1111 | |
---|
| 1112 | if(gl2ps->sort == GL2PS_SIMPLE_SORT){ |
---|
| 1113 | factor = gl2ps->offset[0]; |
---|
| 1114 | units = gl2ps->offset[1]; |
---|
| 1115 | } |
---|
| 1116 | else{ |
---|
| 1117 | factor = gl2ps->offset[0] / 800.; |
---|
| 1118 | units = gl2ps->offset[1] / 800.; |
---|
| 1119 | } |
---|
| 1120 | |
---|
| 1121 | area = |
---|
| 1122 | (prim->verts[1].xyz[0] - prim->verts[0].xyz[0]) * |
---|
| 1123 | (prim->verts[2].xyz[1] - prim->verts[1].xyz[1]) - |
---|
| 1124 | (prim->verts[2].xyz[0] - prim->verts[1].xyz[0]) * |
---|
| 1125 | (prim->verts[1].xyz[1] - prim->verts[0].xyz[1]); |
---|
| 1126 | dZdX = |
---|
| 1127 | (prim->verts[2].xyz[1] - prim->verts[1].xyz[1]) * |
---|
| 1128 | (prim->verts[1].xyz[2] - prim->verts[0].xyz[2]) - |
---|
| 1129 | (prim->verts[1].xyz[1] - prim->verts[0].xyz[1]) * |
---|
| 1130 | (prim->verts[2].xyz[2] - prim->verts[1].xyz[2]) / area; |
---|
| 1131 | dZdY = |
---|
| 1132 | (prim->verts[1].xyz[0] - prim->verts[0].xyz[0]) * |
---|
| 1133 | (prim->verts[2].xyz[2] - prim->verts[1].xyz[2]) - |
---|
| 1134 | (prim->verts[2].xyz[0] - prim->verts[1].xyz[0]) * |
---|
| 1135 | (prim->verts[1].xyz[2] - prim->verts[0].xyz[2]) / area; |
---|
| 1136 | |
---|
| 1137 | maxdZ = std::sqrt(dZdX*dZdX + dZdY*dZdY); |
---|
| 1138 | |
---|
| 1139 | dZ = factor * maxdZ + units; |
---|
| 1140 | |
---|
| 1141 | prim->verts[0].xyz[2] += dZ; |
---|
| 1142 | prim->verts[1].xyz[2] += dZ; |
---|
| 1143 | prim->verts[2].xyz[2] += dZ; |
---|
| 1144 | } |
---|
| 1145 | |
---|
| 1146 | prim->depth = 0.; |
---|
| 1147 | if(gl2ps->sort == GL2PS_SIMPLE_SORT){ |
---|
| 1148 | for(i = 0; i < numverts; i++){ |
---|
| 1149 | prim->depth += prim->verts[i].xyz[2]; |
---|
| 1150 | } |
---|
| 1151 | prim->depth /= (GLfloat)numverts; |
---|
| 1152 | } |
---|
| 1153 | |
---|
| 1154 | gl2psListAdd(gl2ps->primitives, &prim); |
---|
| 1155 | } |
---|
| 1156 | |
---|
| 1157 | GLint gl2psGetVertex(GL2PSvertex *v, GLfloat *p){ |
---|
| 1158 | GLint i; |
---|
| 1159 | |
---|
| 1160 | v->xyz[0] = p[0]; |
---|
| 1161 | v->xyz[1] = p[1]; |
---|
| 1162 | v->xyz[2] = GL2PS_DEPTH_FACT * p[2]; |
---|
| 1163 | |
---|
| 1164 | if(gl2ps->colormode == GL_COLOR_INDEX && gl2ps->colorsize > 0){ |
---|
| 1165 | i = (GLint)(p[3] + 0.5); |
---|
| 1166 | v->rgba[0] = gl2ps->colormap[i][0]; |
---|
| 1167 | v->rgba[1] = gl2ps->colormap[i][1]; |
---|
| 1168 | v->rgba[2] = gl2ps->colormap[i][2]; |
---|
| 1169 | v->rgba[3] = gl2ps->colormap[i][3]; |
---|
| 1170 | return 4; |
---|
| 1171 | } |
---|
| 1172 | else{ |
---|
| 1173 | v->rgba[0] = p[3]; |
---|
| 1174 | v->rgba[1] = p[4]; |
---|
| 1175 | v->rgba[2] = p[5]; |
---|
| 1176 | v->rgba[3] = p[6]; |
---|
| 1177 | return 7; |
---|
| 1178 | } |
---|
| 1179 | } |
---|
| 1180 | |
---|
| 1181 | GLint gl2psParseFeedbackBuffer(void){ |
---|
| 1182 | char flag, dash = 0; |
---|
| 1183 | GLshort boundary; |
---|
| 1184 | GLint i, used, count, v, vtot, offset = 0; |
---|
| 1185 | GLfloat lwidth = 1., psize = 1.; |
---|
| 1186 | GLfloat *current; |
---|
| 1187 | GL2PSvertex vertices[3]; |
---|
| 1188 | |
---|
| 1189 | used = glRenderMode(GL_RENDER); |
---|
| 1190 | |
---|
| 1191 | if(used < 0){ |
---|
| 1192 | gl2psMsg(GL2PS_INFO, "OpenGL feedback buffer overflow"); |
---|
| 1193 | return GL2PS_OVERFLOW; |
---|
| 1194 | } |
---|
| 1195 | |
---|
| 1196 | if(used == 0){ |
---|
| 1197 | /* gl2psMsg(GL2PS_INFO, "Empty feedback buffer"); */ |
---|
| 1198 | return GL2PS_NO_FEEDBACK; |
---|
| 1199 | } |
---|
| 1200 | |
---|
| 1201 | current = gl2ps->feedback; |
---|
| 1202 | boundary = gl2ps->boundary = 0; |
---|
| 1203 | |
---|
| 1204 | while(used > 0){ |
---|
| 1205 | |
---|
| 1206 | if(boundary) gl2ps->boundary = 1; |
---|
| 1207 | |
---|
| 1208 | switch((GLint)*current){ |
---|
| 1209 | case GL_POINT_TOKEN : |
---|
| 1210 | current ++; |
---|
| 1211 | used --; |
---|
| 1212 | i = gl2psGetVertex(&vertices[0], current); |
---|
| 1213 | current += i; |
---|
| 1214 | used -= i; |
---|
| 1215 | gl2psAddPolyPrimitive(GL2PS_POINT, 1, vertices, 0, dash, psize, 0); |
---|
| 1216 | break; |
---|
| 1217 | case GL_LINE_TOKEN : |
---|
| 1218 | case GL_LINE_RESET_TOKEN : |
---|
| 1219 | current ++; |
---|
| 1220 | used --; |
---|
| 1221 | i = gl2psGetVertex(&vertices[0], current); |
---|
| 1222 | current += i; |
---|
| 1223 | used -= i; |
---|
| 1224 | i = gl2psGetVertex(&vertices[1], current); |
---|
| 1225 | current += i; |
---|
| 1226 | used -= i; |
---|
| 1227 | gl2psAddPolyPrimitive(GL2PS_LINE, 2, vertices, 0, dash, lwidth, 0); |
---|
| 1228 | break; |
---|
| 1229 | case GL_POLYGON_TOKEN : |
---|
| 1230 | count = (GLint)current[1]; |
---|
| 1231 | current += 2; |
---|
| 1232 | used -= 2; |
---|
| 1233 | v = vtot = 0; |
---|
| 1234 | while(count > 0 && used > 0){ |
---|
| 1235 | i = gl2psGetVertex(&vertices[v], current); |
---|
| 1236 | current += i; |
---|
| 1237 | used -= i; |
---|
| 1238 | count --; |
---|
| 1239 | vtot++; |
---|
| 1240 | if(v == 2){ |
---|
| 1241 | if(boundary){ |
---|
| 1242 | if(!count && vtot == 2) flag = 1|2|4; |
---|
| 1243 | else if(!count) flag = 2|4; |
---|
| 1244 | else if(vtot == 2) flag = 1|2; |
---|
| 1245 | else flag = 2; |
---|
| 1246 | } |
---|
| 1247 | else |
---|
| 1248 | flag = 0; |
---|
| 1249 | gl2psAddPolyPrimitive(GL2PS_TRIANGLE, 3, vertices, |
---|
| 1250 | offset, dash, 1, flag); |
---|
| 1251 | vertices[1] = vertices[2]; |
---|
| 1252 | } |
---|
| 1253 | else |
---|
| 1254 | v ++; |
---|
| 1255 | } |
---|
| 1256 | break; |
---|
| 1257 | case GL_BITMAP_TOKEN : |
---|
| 1258 | case GL_DRAW_PIXEL_TOKEN : |
---|
| 1259 | case GL_COPY_PIXEL_TOKEN : |
---|
| 1260 | current ++; |
---|
| 1261 | used --; |
---|
| 1262 | i = gl2psGetVertex(&vertices[0], current); |
---|
| 1263 | current += i; |
---|
| 1264 | used -= i; |
---|
| 1265 | break; |
---|
| 1266 | case GL_PASS_THROUGH_TOKEN : |
---|
| 1267 | switch((GLint)current[1]){ |
---|
| 1268 | case GL2PS_BEGIN_POLYGON_OFFSET_FILL : offset = 1; break; |
---|
| 1269 | case GL2PS_END_POLYGON_OFFSET_FILL : offset = 0; break; |
---|
| 1270 | case GL2PS_BEGIN_POLYGON_BOUNDARY : boundary = 1; break; |
---|
| 1271 | case GL2PS_END_POLYGON_BOUNDARY : boundary = 0; break; |
---|
| 1272 | case GL2PS_BEGIN_LINE_STIPPLE : dash = 4; break; |
---|
| 1273 | case GL2PS_END_LINE_STIPPLE : dash = 0; break; |
---|
| 1274 | case GL2PS_SET_POINT_SIZE : |
---|
| 1275 | current += 2; |
---|
| 1276 | used -= 2; |
---|
| 1277 | psize = current[1]; |
---|
| 1278 | break; |
---|
| 1279 | case GL2PS_SET_LINE_WIDTH : |
---|
| 1280 | current += 2; |
---|
| 1281 | used -= 2; |
---|
| 1282 | lwidth = current[1]; |
---|
| 1283 | break; |
---|
| 1284 | } |
---|
| 1285 | current += 2; |
---|
| 1286 | used -= 2; |
---|
| 1287 | break; |
---|
| 1288 | default : |
---|
| 1289 | gl2psMsg(GL2PS_WARNING, "Unknown token in buffer"); |
---|
| 1290 | current ++; |
---|
| 1291 | used --; |
---|
| 1292 | break; |
---|
| 1293 | } |
---|
| 1294 | } |
---|
| 1295 | |
---|
| 1296 | return GL2PS_SUCCESS; |
---|
| 1297 | } |
---|
| 1298 | |
---|
| 1299 | GLboolean gl2psSameColor(GL2PSrgba rgba1, GL2PSrgba rgba2){ |
---|
| 1300 | return !(rgba1[0] != rgba2[0] || |
---|
| 1301 | rgba1[1] != rgba2[1] || |
---|
| 1302 | rgba1[2] != rgba2[2]); |
---|
| 1303 | } |
---|
| 1304 | |
---|
| 1305 | GLboolean gl2psVertsSameColor(const GL2PSprimitive *prim){ |
---|
| 1306 | int i; |
---|
| 1307 | |
---|
| 1308 | for(i = 1; i < prim->numverts; i++){ |
---|
| 1309 | if(!gl2psSameColor(prim->verts[0].rgba, prim->verts[i].rgba)){ |
---|
| 1310 | return 0; |
---|
| 1311 | } |
---|
| 1312 | } |
---|
| 1313 | return 1; |
---|
| 1314 | } |
---|
| 1315 | |
---|
| 1316 | GLint gl2psPrintPrimitives(void); |
---|
| 1317 | |
---|
| 1318 | /* The PostScript routines. Other (vector) image formats should be |
---|
| 1319 | easy to generate by creating the three corresponding routines |
---|
| 1320 | (gl2psPrintXXXHeader, gl2psPrintXXXPrimitive, gl2psPrintXXXFooter, |
---|
| 1321 | gl2psPrintXXXBeginViewport and gl2psPrintXXXEndViewport) for the |
---|
| 1322 | new format. */ |
---|
| 1323 | |
---|
| 1324 | void gl2psWriteByte(FILE *stream, unsigned char byte){ |
---|
| 1325 | unsigned char h = byte / 16; |
---|
| 1326 | unsigned char l = byte % 16; |
---|
| 1327 | fprintf(stream, "%x%x", h, l); |
---|
| 1328 | } |
---|
| 1329 | |
---|
| 1330 | int gl2psGetRGB(GLfloat *pixels, GLsizei width, GLsizei height, GLuint x, GLuint y, |
---|
| 1331 | GLfloat *red, GLfloat *green, GLfloat *blue){ |
---|
| 1332 | /* OpenGL image is from down to up, PS image is up to down */ |
---|
| 1333 | GLfloat *pimag; |
---|
| 1334 | pimag = pixels + 3 * (width * (height - 1 - y) + x); |
---|
| 1335 | *red = *pimag; pimag++; |
---|
| 1336 | *green = *pimag; pimag++; |
---|
| 1337 | *blue = *pimag; pimag++; |
---|
| 1338 | return 1; |
---|
| 1339 | } |
---|
| 1340 | |
---|
| 1341 | void gl2psPrintPostScriptPixmap(GLfloat x, GLfloat y, GLsizei width, GLsizei height, |
---|
| 1342 | GLenum, GLenum, GLfloat *pixels, |
---|
| 1343 | FILE *stream){ |
---|
| 1344 | typedef unsigned char Uchar; |
---|
| 1345 | int status = 1, nbhex, nbyte; |
---|
| 1346 | int row, col, ibyte,icase; |
---|
| 1347 | float dr, dg, db, fgrey; |
---|
| 1348 | Uchar red, green, blue, b, grey; |
---|
| 1349 | /* Options */ |
---|
| 1350 | int shade = 0; |
---|
| 1351 | //int nbit = 2; |
---|
| 1352 | int nbit = 4; |
---|
| 1353 | //int nbit = 8; |
---|
| 1354 | |
---|
| 1355 | if((width <= 0) || (height <= 0)) return; |
---|
| 1356 | |
---|
| 1357 | /* Msg(INFO, "gl2psPrintPostScriptPixmap: x %g y %g w %d h %d", x, y, width, height); */ |
---|
| 1358 | |
---|
| 1359 | fprintf(stream, "gsave\n"); |
---|
| 1360 | fprintf(stream, "%.2f %.2f translate\n", x, y); |
---|
| 1361 | fprintf(stream, "%d %d scale\n", width, height); |
---|
| 1362 | |
---|
| 1363 | if(shade != 0){ /* grey */ |
---|
| 1364 | fprintf(stream, "/picstr %d string def\n", width); |
---|
| 1365 | fprintf(stream, "%d %d %d\n", width, height, 8); |
---|
| 1366 | fprintf(stream, "[ %d 0 0 -%d 0 %d ]\n", width, height, height); |
---|
| 1367 | fprintf(stream, "{ currentfile picstr readhexstring pop }\n"); |
---|
| 1368 | fprintf(stream, "image\n"); |
---|
| 1369 | for(row = 0; row < height; row++){ |
---|
| 1370 | for(col = 0; col < width; col++){ |
---|
| 1371 | status = gl2psGetRGB(pixels, width, height, |
---|
| 1372 | col, row, &dr, &dg, &db) == 0 ? 0 : status; |
---|
| 1373 | fgrey = (0.30 * dr + 0.59 * dg + 0.11 * db); |
---|
| 1374 | grey = (Uchar)(255. * fgrey); |
---|
| 1375 | gl2psWriteByte(stream, grey); |
---|
| 1376 | } |
---|
| 1377 | fprintf(stream, "\n"); |
---|
| 1378 | } |
---|
| 1379 | nbhex = width * height * 2; |
---|
| 1380 | fprintf(stream, "%%%% nbhex digit :%d\n", nbhex); |
---|
| 1381 | } |
---|
| 1382 | else if(nbit == 2){ |
---|
| 1383 | int nrgb = width * 3; |
---|
| 1384 | int nbits = nrgb * nbit; |
---|
| 1385 | nbyte = nbits/8; |
---|
| 1386 | if((nbyte*8)!=nbits) nbyte++; |
---|
| 1387 | /* 2 bit for r and g and b */ |
---|
| 1388 | /* rgbs following each other */ |
---|
| 1389 | fprintf(stream, "/rgbstr %d string def\n", nbyte); |
---|
| 1390 | fprintf(stream, "%d %d %d\n", width, height, nbit); |
---|
| 1391 | fprintf(stream, "[ %d 0 0 -%d 0 %d ]\n", width, height, height); |
---|
| 1392 | fprintf(stream, "{ currentfile rgbstr readhexstring pop }\n" ); |
---|
| 1393 | fprintf(stream, "false 3\n" ); |
---|
| 1394 | fprintf(stream, "colorimage\n" ); |
---|
| 1395 | for(row = 0; row < height; row++){ |
---|
| 1396 | icase = 1; |
---|
| 1397 | col = 0; |
---|
| 1398 | b = 0; |
---|
| 1399 | for(ibyte = 0; ibyte < nbyte; ibyte++){ |
---|
| 1400 | if(icase==1) { |
---|
| 1401 | if(col<width) { |
---|
| 1402 | status = gl2psGetRGB(pixels, width, height, |
---|
| 1403 | col, row, &dr, &dg, &db) == 0 ? 0 : status; |
---|
| 1404 | } else { |
---|
| 1405 | dr = dg = db = 0; |
---|
| 1406 | } |
---|
| 1407 | col++; |
---|
| 1408 | red = (Uchar)(3. * dr); |
---|
| 1409 | green = (Uchar)(3. * dg); |
---|
| 1410 | blue = (Uchar)(3. * db); |
---|
| 1411 | b = red; |
---|
| 1412 | b = (b<<2)+green; |
---|
| 1413 | b = (b<<2)+blue; |
---|
| 1414 | if(col<width) { |
---|
| 1415 | status = gl2psGetRGB(pixels, width, height, |
---|
| 1416 | col, row, &dr, &dg, &db) == 0 ? 0 : status; |
---|
| 1417 | } else { |
---|
| 1418 | dr = dg = db = 0; |
---|
| 1419 | } |
---|
| 1420 | col++; |
---|
| 1421 | red = (Uchar)(3. * dr); |
---|
| 1422 | green = (Uchar)(3. * dg); |
---|
| 1423 | blue = (Uchar)(3. * db); |
---|
| 1424 | b = (b<<2)+red; |
---|
| 1425 | gl2psWriteByte(stream, b); |
---|
| 1426 | b = 0; |
---|
| 1427 | icase++; |
---|
| 1428 | } else if(icase==2) { |
---|
| 1429 | b = green; |
---|
| 1430 | b = (b<<2)+blue; |
---|
| 1431 | if(col<width) { |
---|
| 1432 | status = gl2psGetRGB(pixels, width, height, |
---|
| 1433 | col, row, &dr, &dg, &db) == 0 ? 0 : status; |
---|
| 1434 | } else { |
---|
| 1435 | dr = dg = db = 0; |
---|
| 1436 | } |
---|
| 1437 | col++; |
---|
| 1438 | red = (Uchar)(3. * dr); |
---|
| 1439 | green = (Uchar)(3. * dg); |
---|
| 1440 | blue = (Uchar)(3. * db); |
---|
| 1441 | b = (b<<2)+red; |
---|
| 1442 | b = (b<<2)+green; |
---|
| 1443 | gl2psWriteByte(stream, b); |
---|
| 1444 | b = 0; |
---|
| 1445 | icase++; |
---|
| 1446 | } else if(icase==3) { |
---|
| 1447 | b = blue; |
---|
| 1448 | if(col<width) { |
---|
| 1449 | status = gl2psGetRGB(pixels,width,height, |
---|
| 1450 | col, row, &dr, &dg, &db) == 0 ? 0 : status; |
---|
| 1451 | } else { |
---|
| 1452 | dr = dg = db = 0; |
---|
| 1453 | } |
---|
| 1454 | col++; |
---|
| 1455 | red = (Uchar)(3. * dr); |
---|
| 1456 | green = (Uchar)(3. * dg); |
---|
| 1457 | blue = (Uchar)(3. * db); |
---|
| 1458 | b = (b<<2)+red; |
---|
| 1459 | b = (b<<2)+green; |
---|
| 1460 | b = (b<<2)+blue; |
---|
| 1461 | gl2psWriteByte(stream, b); |
---|
| 1462 | b = 0; |
---|
| 1463 | icase = 1; |
---|
| 1464 | } |
---|
| 1465 | } |
---|
| 1466 | fprintf(stream, "\n"); |
---|
| 1467 | } |
---|
| 1468 | } |
---|
| 1469 | else if(nbit == 4){ |
---|
| 1470 | int nrgb = width * 3; |
---|
| 1471 | int nbits = nrgb * nbit; |
---|
| 1472 | nbyte = nbits/8; |
---|
| 1473 | if((nbyte*8)!=nbits) nbyte++; |
---|
| 1474 | /* 4 bit for r and g and b */ |
---|
| 1475 | /* rgbs following each other */ |
---|
| 1476 | fprintf(stream, "/rgbstr %d string def\n", nbyte); |
---|
| 1477 | fprintf(stream, "%d %d %d\n", width, height,nbit); |
---|
| 1478 | fprintf(stream, "[ %d 0 0 -%d 0 %d ]\n", width, height, height); |
---|
| 1479 | fprintf(stream, "{ currentfile rgbstr readhexstring pop }\n"); |
---|
| 1480 | fprintf(stream, "false 3\n"); |
---|
| 1481 | fprintf(stream, "colorimage\n"); |
---|
| 1482 | for(row = 0; row < height; row++){ |
---|
| 1483 | col = 0; |
---|
| 1484 | icase = 1; |
---|
| 1485 | for(ibyte = 0; ibyte < nbyte; ibyte++){ |
---|
| 1486 | if(icase==1) { |
---|
| 1487 | if(col<width) { |
---|
| 1488 | status = gl2psGetRGB(pixels, width, height, |
---|
| 1489 | col, row, &dr, &dg, &db) == 0 ? 0 : status; |
---|
| 1490 | } else { |
---|
| 1491 | dr = dg = db = 0; |
---|
| 1492 | } |
---|
| 1493 | col++; |
---|
| 1494 | red = (Uchar)(15. * dr); |
---|
| 1495 | green = (Uchar)(15. * dg); |
---|
| 1496 | fprintf(stream, "%x%x", red, green); |
---|
| 1497 | icase++; |
---|
| 1498 | } else if(icase==2) { |
---|
| 1499 | blue = (Uchar)(15. * db); |
---|
| 1500 | if(col<width) { |
---|
| 1501 | status = gl2psGetRGB(pixels, width, height, |
---|
| 1502 | col, row, &dr, &dg, &db) == 0 ? 0 : status; |
---|
| 1503 | } else { |
---|
| 1504 | dr = dg = db = 0; |
---|
| 1505 | } |
---|
| 1506 | col++; |
---|
| 1507 | red = (Uchar)(15. * dr); |
---|
| 1508 | fprintf(stream,"%x%x",blue,red); |
---|
| 1509 | icase++; |
---|
| 1510 | } else if(icase==3) { |
---|
| 1511 | green = (Uchar)(15. * dg); |
---|
| 1512 | blue = (Uchar)(15. * db); |
---|
| 1513 | fprintf(stream, "%x%x", green, blue); |
---|
| 1514 | icase = 1; |
---|
| 1515 | } |
---|
| 1516 | } |
---|
| 1517 | fprintf(stream, "\n"); |
---|
| 1518 | } |
---|
| 1519 | } |
---|
| 1520 | else{ |
---|
| 1521 | nbyte = width * 3; |
---|
| 1522 | /* 8 bit for r and g and b */ |
---|
| 1523 | fprintf(stream, "/rgbstr %d string def\n", nbyte); |
---|
| 1524 | fprintf(stream, "%d %d %d\n", width, height, 8); |
---|
| 1525 | fprintf(stream, "[ %d 0 0 -%d 0 %d ]\n", width, height, height); |
---|
| 1526 | fprintf(stream, "{ currentfile rgbstr readhexstring pop }\n"); |
---|
| 1527 | fprintf(stream, "false 3\n"); |
---|
| 1528 | fprintf(stream, "colorimage\n"); |
---|
| 1529 | for(row = 0; row < height; row++){ |
---|
| 1530 | for(col = 0; col < width; col++){ |
---|
| 1531 | status = gl2psGetRGB(pixels, width, height, |
---|
| 1532 | col, row, &dr, &dg, &db) == 0 ? 0 : status; |
---|
| 1533 | red = (Uchar)(255. * dr); |
---|
| 1534 | gl2psWriteByte(stream, red); |
---|
| 1535 | green = (Uchar)(255. * dg); |
---|
| 1536 | gl2psWriteByte(stream, green); |
---|
| 1537 | blue = (Uchar)(255. * db); |
---|
| 1538 | gl2psWriteByte(stream, blue); |
---|
| 1539 | } |
---|
| 1540 | fprintf(stream, "\n"); |
---|
| 1541 | } |
---|
| 1542 | } |
---|
| 1543 | |
---|
| 1544 | if(status == 0){ |
---|
| 1545 | gl2psMsg(GL2PS_ERROR, "Problem to retreive some pixel rgb"); |
---|
| 1546 | } |
---|
| 1547 | fprintf(stream, "grestore\n"); |
---|
| 1548 | } |
---|
| 1549 | |
---|
| 1550 | void gl2psPrintPostScriptHeader(void){ |
---|
| 1551 | GLint index; |
---|
| 1552 | GLfloat rgba[4]; |
---|
| 1553 | time_t now; |
---|
| 1554 | |
---|
| 1555 | time(&now); |
---|
| 1556 | |
---|
| 1557 | if(gl2ps->format == GL2PS_PS){ |
---|
| 1558 | fprintf(gl2ps->stream, "%%!PS-Adobe-3.0\n"); |
---|
| 1559 | } |
---|
| 1560 | else{ |
---|
| 1561 | fprintf(gl2ps->stream, "%%!PS-Adobe-3.0 EPSF-3.0\n"); |
---|
| 1562 | } |
---|
| 1563 | |
---|
| 1564 | fprintf(gl2ps->stream, |
---|
| 1565 | "%%%%Title: %s\n" |
---|
| 1566 | "%%%%Creator: GL2PS, an OpenGL to PostScript Printing Library, v. %g\n" |
---|
| 1567 | "%%%%For: %s\n" |
---|
| 1568 | "%%%%CreationDate: %s" |
---|
| 1569 | "%%%%LanguageLevel: 3\n" |
---|
| 1570 | "%%%%DocumentData: Clean7Bit\n" |
---|
| 1571 | "%%%%Pages: 1\n", |
---|
| 1572 | gl2ps->title, GL2PS_VERSION, gl2ps->producer, ctime(&now)); |
---|
| 1573 | |
---|
| 1574 | if(gl2ps->format == GL2PS_PS){ |
---|
| 1575 | fprintf(gl2ps->stream, |
---|
| 1576 | "%%%%Orientation: %s\n" |
---|
| 1577 | "%%%%DocumentMedia: Default %d %d 0 () ()\n", |
---|
| 1578 | (gl2ps->options & GL2PS_LANDSCAPE) ? "Landscape" : "Portrait", |
---|
| 1579 | (gl2ps->options & GL2PS_LANDSCAPE) ? gl2ps->viewport[3] : gl2ps->viewport[2], |
---|
| 1580 | (gl2ps->options & GL2PS_LANDSCAPE) ? gl2ps->viewport[2] : gl2ps->viewport[3]); |
---|
| 1581 | } |
---|
| 1582 | |
---|
| 1583 | fprintf(gl2ps->stream, |
---|
| 1584 | "%%%%BoundingBox: %d %d %d %d\n" |
---|
| 1585 | "%%%%Copyright: GNU LGPL (C) 1999-2003 Christophe Geuzaine <geuz@geuz.org>\n" |
---|
| 1586 | "%%%%EndComments\n", |
---|
| 1587 | (gl2ps->options & GL2PS_LANDSCAPE) ? gl2ps->viewport[1] : gl2ps->viewport[0], |
---|
| 1588 | (gl2ps->options & GL2PS_LANDSCAPE) ? gl2ps->viewport[0] : gl2ps->viewport[1], |
---|
| 1589 | (gl2ps->options & GL2PS_LANDSCAPE) ? gl2ps->viewport[3] : gl2ps->viewport[2], |
---|
| 1590 | (gl2ps->options & GL2PS_LANDSCAPE) ? gl2ps->viewport[2] : gl2ps->viewport[3]); |
---|
| 1591 | |
---|
| 1592 | /* RGB color: r g b C (replace C by G in output to change from rgb to gray) |
---|
| 1593 | Grayscale: r g b G |
---|
| 1594 | Font choose: size fontname FC |
---|
| 1595 | String primitive: (string) x y size fontname S |
---|
| 1596 | Point primitive: x y size P |
---|
| 1597 | Line width: width W |
---|
| 1598 | Flat-shaded line: x2 y2 x1 y1 L |
---|
| 1599 | Smooth-shaded line: x2 y2 r2 g2 b2 x1 y1 r1 g1 b1 SL |
---|
| 1600 | Flat-shaded triangle: x3 y3 x2 y2 x1 y1 T |
---|
| 1601 | Smooth-shaded triangle: x3 y3 r3 g3 b3 x2 y2 r2 g2 b2 x1 y1 r1 g1 b1 ST */ |
---|
| 1602 | |
---|
| 1603 | fprintf(gl2ps->stream, |
---|
| 1604 | "%%%%BeginProlog\n" |
---|
| 1605 | "/gl2psdict 64 dict def gl2psdict begin\n" |
---|
| 1606 | "1 setlinecap 1 setlinejoin\n" |
---|
| 1607 | "/tryPS3shading %s def %% set to false to force subdivision\n" |
---|
| 1608 | "/rThreshold %g def %% red component subdivision threshold\n" |
---|
| 1609 | "/gThreshold %g def %% green component subdivision threshold\n" |
---|
| 1610 | "/bThreshold %g def %% blue component subdivision threshold\n" |
---|
| 1611 | "/BD { bind def } bind def\n" |
---|
| 1612 | "/C { setrgbcolor } BD\n" |
---|
| 1613 | "/G { 0.082 mul exch 0.6094 mul add exch 0.3086 mul add neg 1.0 add setgray } BD\n" |
---|
| 1614 | "/W { setlinewidth } BD\n" |
---|
| 1615 | "/FC { findfont exch scalefont setfont } BD\n" |
---|
| 1616 | "/S { FC moveto show } BD\n" |
---|
| 1617 | "/P { newpath 0.0 360.0 arc closepath fill } BD\n" |
---|
| 1618 | "/L { newpath moveto lineto stroke } BD\n" |
---|
| 1619 | "/SL { C moveto C lineto stroke } BD\n" |
---|
| 1620 | "/T { newpath moveto lineto lineto closepath fill } BD\n", |
---|
| 1621 | (gl2ps->options & GL2PS_NO_PS3_SHADING) ? "false" : "true", |
---|
| 1622 | gl2ps->threshold[0], gl2ps->threshold[1], gl2ps->threshold[2]); |
---|
| 1623 | |
---|
| 1624 | /* Smooth-shaded triangle with PostScript level 3 shfill operator: |
---|
| 1625 | x3 y3 r3 g3 b3 x2 y2 r2 g2 b2 x1 y1 r1 g1 b1 STshfill */ |
---|
| 1626 | |
---|
| 1627 | fprintf(gl2ps->stream, |
---|
| 1628 | "/STshfill {\n" |
---|
| 1629 | " /b1 exch def /g1 exch def /r1 exch def /y1 exch def /x1 exch def\n" |
---|
| 1630 | " /b2 exch def /g2 exch def /r2 exch def /y2 exch def /x2 exch def\n" |
---|
| 1631 | " /b3 exch def /g3 exch def /r3 exch def /y3 exch def /x3 exch def\n" |
---|
| 1632 | " gsave << /ShadingType 4 /ColorSpace [/DeviceRGB]\n" |
---|
| 1633 | " /DataSource [ 0 x1 y1 r1 g1 b1 0 x2 y2 r2 g2 b2 0 x3 y3 r3 g3 b3 ] >>\n" |
---|
| 1634 | " shfill grestore } BD\n"); |
---|
| 1635 | |
---|
| 1636 | /* Flat-shaded triangle with middle color: |
---|
| 1637 | x3 y3 r3 g3 b3 x2 y2 r2 g2 b2 x1 y1 r1 g1 b1 Tm */ |
---|
| 1638 | |
---|
| 1639 | fprintf(gl2ps->stream, |
---|
| 1640 | /* stack : x3 y3 r3 g3 b3 x2 y2 r2 g2 b2 x1 y1 r1 g1 b1 */ |
---|
| 1641 | "/Tm { 3 -1 roll 8 -1 roll 13 -1 roll add add 3 div\n" /* r = (r1+r2+r3)/3 */ |
---|
| 1642 | /* stack : x3 y3 g3 b3 x2 y2 g2 b2 x1 y1 g1 b1 r */ |
---|
| 1643 | " 3 -1 roll 7 -1 roll 11 -1 roll add add 3 div\n" /* g = (g1+g2+g3)/3 */ |
---|
| 1644 | /* stack : x3 y3 b3 x2 y2 b2 x1 y1 b1 r g b */ |
---|
| 1645 | " 3 -1 roll 6 -1 roll 9 -1 roll add add 3 div" /* b = (b1+b2+b3)/3 */ |
---|
| 1646 | /* stack : x3 y3 x2 y2 x1 y1 r g b */ |
---|
| 1647 | " C T } BD\n"); |
---|
| 1648 | |
---|
| 1649 | /* Split triangle in four sub-triangles (at sides middle points) and call the |
---|
| 1650 | STnoshfill procedure on each, interpolating the colors in RGB space: |
---|
| 1651 | x3 y3 r3 g3 b3 x2 y2 r2 g2 b2 x1 y1 r1 g1 b1 STsplit |
---|
| 1652 | (in procedure comments key: (Vi) = xi yi ri gi bi) */ |
---|
| 1653 | |
---|
| 1654 | fprintf(gl2ps->stream, |
---|
| 1655 | "/STsplit {\n" |
---|
| 1656 | " 4 index 15 index add 0.5 mul\n" /* x13 = (x1+x3)/2 */ |
---|
| 1657 | " 4 index 15 index add 0.5 mul\n" /* y13 = (y1+y3)/2 */ |
---|
| 1658 | " 4 index 15 index add 0.5 mul\n" /* r13 = (r1+r3)/2 */ |
---|
| 1659 | " 4 index 15 index add 0.5 mul\n" /* g13 = (g1+g3)/2 */ |
---|
| 1660 | " 4 index 15 index add 0.5 mul\n" /* b13 = (b1+b3)/2 */ |
---|
| 1661 | " 5 copy 5 copy 25 15 roll\n" |
---|
| 1662 | /* stack : (V3) (V13) (V13) (V13) (V2) (V1) */ |
---|
| 1663 | " 9 index 30 index add 0.5 mul\n" /* x23 = (x2+x3)/2 */ |
---|
| 1664 | " 9 index 30 index add 0.5 mul\n" /* y23 = (y2+y3)/2 */ |
---|
| 1665 | " 9 index 30 index add 0.5 mul\n" /* r23 = (r2+r3)/2 */ |
---|
| 1666 | " 9 index 30 index add 0.5 mul\n" /* g23 = (g2+g3)/2 */ |
---|
| 1667 | " 9 index 30 index add 0.5 mul\n" /* b23 = (b2+b3)/2 */ |
---|
| 1668 | " 5 copy 5 copy 35 5 roll 25 5 roll 15 5 roll\n" |
---|
| 1669 | /* stack : (V3) (V13) (V23) (V13) (V23) (V13) (V23) (V2) (V1) */ |
---|
| 1670 | " 4 index 10 index add 0.5 mul\n" /* x12 = (x1+x2)/2 */ |
---|
| 1671 | " 4 index 10 index add 0.5 mul\n" /* y12 = (y1+y2)/2 */ |
---|
| 1672 | " 4 index 10 index add 0.5 mul\n" /* r12 = (r1+r2)/2 */ |
---|
| 1673 | " 4 index 10 index add 0.5 mul\n" /* g12 = (g1+g2)/2 */ |
---|
| 1674 | " 4 index 10 index add 0.5 mul\n" /* b12 = (b1+b2)/2 */ |
---|
| 1675 | " 5 copy 5 copy 40 5 roll 25 5 roll 15 5 roll 25 5 roll\n" |
---|
| 1676 | /* stack : (V3) (V13) (V23) (V13) (V12) (V23) (V13) (V1) (V12) (V23) (V12) (V2) */ |
---|
| 1677 | " STnoshfill STnoshfill STnoshfill STnoshfill } BD\n"); |
---|
| 1678 | |
---|
| 1679 | /* Gouraud shaded triangle using recursive subdivision until the difference |
---|
| 1680 | between corner colors does not exceed the thresholds: |
---|
| 1681 | x3 y3 r3 g3 b3 x2 y2 r2 g2 b2 x1 y1 r1 g1 b1 STnoshfill */ |
---|
| 1682 | |
---|
| 1683 | fprintf(gl2ps->stream, |
---|
| 1684 | "/STnoshfill {\n" |
---|
| 1685 | " 2 index 8 index sub abs rThreshold gt\n" /* |r1-r2|>rth */ |
---|
| 1686 | " { STsplit }\n" |
---|
| 1687 | " { 1 index 7 index sub abs gThreshold gt\n" /* |g1-g2|>gth */ |
---|
| 1688 | " { STsplit }\n" |
---|
| 1689 | " { dup 6 index sub abs bThreshold gt\n" /* |b1-b2|>bth */ |
---|
| 1690 | " { STsplit }\n" |
---|
| 1691 | " { 2 index 13 index sub abs rThreshold gt\n" /* |r1-r3|>rht */ |
---|
| 1692 | " { STsplit }\n" |
---|
| 1693 | " { 1 index 12 index sub abs gThreshold gt\n" /* |g1-g3|>gth */ |
---|
| 1694 | " { STsplit }\n" |
---|
| 1695 | " { dup 11 index sub abs bThreshold gt\n" /* |b1-b3|>bth */ |
---|
| 1696 | " { STsplit }\n" |
---|
| 1697 | " { 7 index 13 index sub abs rThreshold gt\n" /* |r2-r3|>rht */ |
---|
| 1698 | " { STsplit }\n" |
---|
| 1699 | " { 6 index 12 index sub abs gThreshold gt\n" /* |g2-g3|>gth */ |
---|
| 1700 | " { STsplit }\n" |
---|
| 1701 | " { 5 index 11 index sub abs bThreshold gt\n" /* |b2-b3|>bth */ |
---|
| 1702 | " { STsplit }\n" |
---|
| 1703 | " { Tm }\n" /* all colors sufficiently similar */ |
---|
| 1704 | " ifelse }\n" |
---|
| 1705 | " ifelse }\n" |
---|
| 1706 | " ifelse }\n" |
---|
| 1707 | " ifelse }\n" |
---|
| 1708 | " ifelse }\n" |
---|
| 1709 | " ifelse }\n" |
---|
| 1710 | " ifelse }\n" |
---|
| 1711 | " ifelse }\n" |
---|
| 1712 | " ifelse } BD\n"); |
---|
| 1713 | |
---|
| 1714 | fprintf(gl2ps->stream, |
---|
| 1715 | "tryPS3shading\n" |
---|
| 1716 | "{ /shfill where\n" |
---|
| 1717 | " { /ST { STshfill } BD }\n" |
---|
| 1718 | " { /ST { STnoshfill } BD }\n" |
---|
| 1719 | " ifelse }\n" |
---|
| 1720 | "{ /ST { STnoshfill } BD }\n" |
---|
| 1721 | "ifelse\n"); |
---|
| 1722 | |
---|
| 1723 | fprintf(gl2ps->stream, |
---|
| 1724 | "end\n" |
---|
| 1725 | "%%%%EndProlog\n" |
---|
| 1726 | "%%%%BeginSetup\n" |
---|
| 1727 | "/DeviceRGB setcolorspace\n" |
---|
| 1728 | "gl2psdict begin\n" |
---|
| 1729 | "%%%%EndSetup\n" |
---|
| 1730 | "%%%%Page: 1 1\n" |
---|
| 1731 | "%%%%BeginPageSetup\n"); |
---|
| 1732 | |
---|
| 1733 | if(gl2ps->options & GL2PS_LANDSCAPE){ |
---|
| 1734 | fprintf(gl2ps->stream, |
---|
| 1735 | "%d 0 translate 90 rotate\n", |
---|
| 1736 | gl2ps->viewport[3]); |
---|
| 1737 | } |
---|
| 1738 | |
---|
| 1739 | fprintf(gl2ps->stream, |
---|
| 1740 | "%%%%EndPageSetup\n" |
---|
| 1741 | "mark\n" |
---|
| 1742 | "gsave\n" |
---|
| 1743 | "1.0 1.0 scale\n"); |
---|
| 1744 | |
---|
| 1745 | if(gl2ps->options & GL2PS_DRAW_BACKGROUND){ |
---|
| 1746 | if(gl2ps->colormode == GL_RGBA || gl2ps->colorsize == 0){ |
---|
| 1747 | glGetFloatv(GL_COLOR_CLEAR_VALUE, rgba); |
---|
| 1748 | } |
---|
| 1749 | else{ |
---|
| 1750 | glGetIntegerv(GL_INDEX_CLEAR_VALUE, &index); |
---|
| 1751 | rgba[0] = gl2ps->colormap[index][0]; |
---|
| 1752 | rgba[1] = gl2ps->colormap[index][1]; |
---|
| 1753 | rgba[2] = gl2ps->colormap[index][2]; |
---|
| 1754 | rgba[3] = 0.; |
---|
| 1755 | } |
---|
| 1756 | fprintf(gl2ps->stream, |
---|
| 1757 | "%g %g %g C\n" |
---|
| 1758 | "newpath %d %d moveto %d %d lineto %d %d lineto %d %d lineto\n" |
---|
| 1759 | "closepath fill\n", |
---|
| 1760 | rgba[0], rgba[1], rgba[2], |
---|
| 1761 | gl2ps->viewport[0], gl2ps->viewport[1], gl2ps->viewport[2], |
---|
| 1762 | gl2ps->viewport[1], gl2ps->viewport[2], gl2ps->viewport[3], |
---|
| 1763 | gl2ps->viewport[0], gl2ps->viewport[3]); |
---|
| 1764 | } |
---|
| 1765 | } |
---|
| 1766 | |
---|
| 1767 | void gl2psPrintPostScriptColor(GL2PSrgba rgba){ |
---|
| 1768 | if(!gl2psSameColor(gl2ps->lastrgba, rgba)){ |
---|
| 1769 | gl2ps->lastrgba[0] = rgba[0]; |
---|
| 1770 | gl2ps->lastrgba[1] = rgba[1]; |
---|
| 1771 | gl2ps->lastrgba[2] = rgba[2]; |
---|
| 1772 | fprintf(gl2ps->stream, "%g %g %g C\n", rgba[0], rgba[1], rgba[2]); |
---|
| 1773 | } |
---|
| 1774 | } |
---|
| 1775 | |
---|
| 1776 | void gl2psResetPostScriptColor(void){ |
---|
| 1777 | gl2ps->lastrgba[0] = gl2ps->lastrgba[1] = gl2ps->lastrgba[2] = -1.; |
---|
| 1778 | } |
---|
| 1779 | |
---|
| 1780 | void gl2psPrintPostScriptPrimitive(void *a, void *){ |
---|
| 1781 | GL2PSprimitive *prim; |
---|
| 1782 | |
---|
| 1783 | prim = *(GL2PSprimitive**)a; |
---|
| 1784 | |
---|
| 1785 | if(gl2ps->options & GL2PS_OCCLUSION_CULL && prim->culled) return; |
---|
| 1786 | |
---|
| 1787 | switch(prim->type){ |
---|
| 1788 | case GL2PS_PIXMAP : |
---|
| 1789 | gl2psPrintPostScriptPixmap(prim->verts[0].xyz[0], prim->verts[0].xyz[1], |
---|
| 1790 | prim->image->width, prim->image->height, |
---|
| 1791 | prim->image->format, prim->image->type, |
---|
| 1792 | prim->image->pixels, gl2ps->stream); |
---|
| 1793 | break; |
---|
| 1794 | case GL2PS_TEXT : |
---|
| 1795 | gl2psPrintPostScriptColor(prim->verts[0].rgba); |
---|
| 1796 | fprintf(gl2ps->stream, "(%s) %g %g %d /%s S\n", |
---|
| 1797 | prim->text->str, prim->verts[0].xyz[0], prim->verts[0].xyz[1], |
---|
| 1798 | prim->text->fontsize, prim->text->fontname); |
---|
| 1799 | break; |
---|
| 1800 | case GL2PS_POINT : |
---|
| 1801 | gl2psPrintPostScriptColor(prim->verts[0].rgba); |
---|
| 1802 | fprintf(gl2ps->stream, "%g %g %g P\n", |
---|
| 1803 | prim->verts[0].xyz[0], prim->verts[0].xyz[1], 0.5*prim->width); |
---|
| 1804 | break; |
---|
| 1805 | case GL2PS_LINE : |
---|
| 1806 | if(gl2ps->lastlinewidth != prim->width){ |
---|
| 1807 | gl2ps->lastlinewidth = prim->width; |
---|
| 1808 | fprintf(gl2ps->stream, "%g W\n", gl2ps->lastlinewidth); |
---|
| 1809 | } |
---|
| 1810 | if(prim->dash){ |
---|
| 1811 | fprintf(gl2ps->stream, "[%d] 0 setdash\n", prim->dash); |
---|
| 1812 | } |
---|
| 1813 | if(gl2ps->shade && !gl2psVertsSameColor(prim)){ |
---|
| 1814 | gl2psResetPostScriptColor(); |
---|
| 1815 | fprintf(gl2ps->stream, "%g %g %g %g %g %g %g %g %g %g SL\n", |
---|
| 1816 | prim->verts[1].xyz[0], prim->verts[1].xyz[1], |
---|
| 1817 | prim->verts[1].rgba[0], prim->verts[1].rgba[1], |
---|
| 1818 | prim->verts[1].rgba[2], prim->verts[0].xyz[0], |
---|
| 1819 | prim->verts[0].xyz[1], prim->verts[0].rgba[0], |
---|
| 1820 | prim->verts[0].rgba[1], prim->verts[0].rgba[2]); |
---|
| 1821 | } |
---|
| 1822 | else{ |
---|
| 1823 | gl2psPrintPostScriptColor(prim->verts[0].rgba); |
---|
| 1824 | fprintf(gl2ps->stream, "%g %g %g %g L\n", |
---|
| 1825 | prim->verts[1].xyz[0], prim->verts[1].xyz[1], |
---|
| 1826 | prim->verts[0].xyz[0], prim->verts[0].xyz[1]); |
---|
| 1827 | } |
---|
| 1828 | if(prim->dash){ |
---|
| 1829 | fprintf(gl2ps->stream, "[] 0 setdash\n"); |
---|
| 1830 | } |
---|
| 1831 | break; |
---|
| 1832 | case GL2PS_TRIANGLE : |
---|
| 1833 | if(gl2ps->shade && !gl2psVertsSameColor(prim)){ |
---|
| 1834 | gl2psResetPostScriptColor(); |
---|
| 1835 | fprintf(gl2ps->stream, "%g %g %g %g %g %g %g %g %g %g %g %g %g %g %g ST\n", |
---|
| 1836 | prim->verts[2].xyz[0], prim->verts[2].xyz[1], |
---|
| 1837 | prim->verts[2].rgba[0], prim->verts[2].rgba[1], |
---|
| 1838 | prim->verts[2].rgba[2], prim->verts[1].xyz[0], |
---|
| 1839 | prim->verts[1].xyz[1], prim->verts[1].rgba[0], |
---|
| 1840 | prim->verts[1].rgba[1], prim->verts[1].rgba[2], |
---|
| 1841 | prim->verts[0].xyz[0], prim->verts[0].xyz[1], |
---|
| 1842 | prim->verts[0].rgba[0], prim->verts[0].rgba[1], |
---|
| 1843 | prim->verts[0].rgba[2]); |
---|
| 1844 | } |
---|
| 1845 | else{ |
---|
| 1846 | gl2psPrintPostScriptColor(prim->verts[0].rgba); |
---|
| 1847 | fprintf(gl2ps->stream, "%g %g %g %g %g %g T\n", |
---|
| 1848 | prim->verts[2].xyz[0], prim->verts[2].xyz[1], |
---|
| 1849 | prim->verts[1].xyz[0], prim->verts[1].xyz[1], |
---|
| 1850 | prim->verts[0].xyz[0], prim->verts[0].xyz[1]); |
---|
| 1851 | } |
---|
| 1852 | break; |
---|
| 1853 | case GL2PS_QUADRANGLE : |
---|
| 1854 | gl2psMsg(GL2PS_WARNING, "There should not be any quad left to print"); |
---|
| 1855 | break; |
---|
| 1856 | default : |
---|
| 1857 | gl2psMsg(GL2PS_ERROR, "Unknown type of primitive to print"); |
---|
| 1858 | break; |
---|
| 1859 | } |
---|
| 1860 | } |
---|
| 1861 | |
---|
| 1862 | void gl2psPrintPostScriptFooter(void){ |
---|
| 1863 | fprintf(gl2ps->stream, |
---|
| 1864 | "grestore\n" |
---|
| 1865 | "showpage\n" |
---|
| 1866 | "cleartomark\n" |
---|
| 1867 | "%%%%PageTrailer\n" |
---|
| 1868 | "%%%%Trailer\n" |
---|
| 1869 | "end\n" |
---|
| 1870 | "%%%%EOF\n"); |
---|
| 1871 | } |
---|
| 1872 | |
---|
| 1873 | void gl2psPrintPostScriptBeginViewport(GLint viewport[4]){ |
---|
| 1874 | GLint index; |
---|
| 1875 | GLfloat rgba[4]; |
---|
| 1876 | int x = viewport[0], y = viewport[1], w = viewport[2], h = viewport[3]; |
---|
| 1877 | |
---|
| 1878 | glRenderMode(GL_FEEDBACK); |
---|
| 1879 | |
---|
| 1880 | fprintf(gl2ps->stream, |
---|
| 1881 | "gsave\n" |
---|
| 1882 | "1.0 1.0 scale\n"); |
---|
| 1883 | |
---|
| 1884 | if(gl2ps->options & GL2PS_DRAW_BACKGROUND){ |
---|
| 1885 | if(gl2ps->colormode == GL_RGBA || gl2ps->colorsize == 0){ |
---|
| 1886 | glGetFloatv(GL_COLOR_CLEAR_VALUE, rgba); |
---|
| 1887 | } |
---|
| 1888 | else{ |
---|
| 1889 | glGetIntegerv(GL_INDEX_CLEAR_VALUE, &index); |
---|
| 1890 | rgba[0] = gl2ps->colormap[index][0]; |
---|
| 1891 | rgba[1] = gl2ps->colormap[index][1]; |
---|
| 1892 | rgba[2] = gl2ps->colormap[index][2]; |
---|
| 1893 | rgba[3] = 0.; |
---|
| 1894 | } |
---|
| 1895 | fprintf(gl2ps->stream, |
---|
| 1896 | "%g %g %g C\n" |
---|
| 1897 | "newpath %d %d moveto %d %d lineto %d %d lineto %d %d lineto\n" |
---|
| 1898 | "closepath fill\n", |
---|
| 1899 | rgba[0], rgba[1], rgba[2], |
---|
| 1900 | x, y, x+w, y, x+w, y+h, x, y+h); |
---|
| 1901 | fprintf(gl2ps->stream, |
---|
| 1902 | "newpath %d %d moveto %d %d lineto %d %d lineto %d %d lineto\n" |
---|
| 1903 | "closepath clip\n", |
---|
| 1904 | x, y, x+w, y, x+w, y+h, x, y+h); |
---|
| 1905 | } |
---|
| 1906 | |
---|
| 1907 | } |
---|
| 1908 | |
---|
| 1909 | GLint gl2psPrintPostScriptEndViewport(void){ |
---|
| 1910 | GLint res; |
---|
| 1911 | |
---|
| 1912 | res = gl2psPrintPrimitives(); |
---|
| 1913 | fprintf(gl2ps->stream, "grestore\n"); |
---|
| 1914 | return res; |
---|
| 1915 | } |
---|
| 1916 | |
---|
| 1917 | /* The LaTeX routines */ |
---|
| 1918 | |
---|
| 1919 | void gl2psPrintTeXHeader(void){ |
---|
| 1920 | char name[256]; |
---|
| 1921 | int i; |
---|
| 1922 | |
---|
| 1923 | if(gl2ps->filename && strlen(gl2ps->filename) < 256){ |
---|
| 1924 | for(i = strlen(gl2ps->filename)-1; i >= 0; i--){ |
---|
| 1925 | if(gl2ps->filename[i] == '.'){ |
---|
| 1926 | strncpy(name, gl2ps->filename, i); |
---|
| 1927 | name[i] = '\0'; |
---|
| 1928 | break; |
---|
| 1929 | } |
---|
| 1930 | } |
---|
| 1931 | if(i <= 0) strcpy(name, gl2ps->filename); |
---|
| 1932 | } |
---|
| 1933 | else{ |
---|
| 1934 | strcpy(name, "untitled"); |
---|
| 1935 | } |
---|
| 1936 | |
---|
| 1937 | fprintf(gl2ps->stream, |
---|
| 1938 | "\\setlength{\\unitlength}{1pt}\n" |
---|
| 1939 | "\\begin{picture}(0,0)\n" |
---|
| 1940 | "\\includegraphics{%s}\n" |
---|
| 1941 | "\\end{picture}%%\n" |
---|
| 1942 | "%s\\begin{picture}(%d,%d)(0,0)\n", |
---|
| 1943 | name, (gl2ps->options & GL2PS_LANDSCAPE) ? "\\rotatebox{90}{" : "", |
---|
| 1944 | gl2ps->viewport[2], gl2ps->viewport[3]); |
---|
| 1945 | } |
---|
| 1946 | |
---|
| 1947 | void gl2psPrintTeXPrimitive(void *a, void *){ |
---|
| 1948 | GL2PSprimitive *prim; |
---|
| 1949 | |
---|
| 1950 | prim = *(GL2PSprimitive**)a; |
---|
| 1951 | |
---|
| 1952 | switch(prim->type){ |
---|
| 1953 | case GL2PS_TEXT : |
---|
| 1954 | fprintf(gl2ps->stream, "\\put(%g,%g){\\makebox(0,0)[lb]{%s}}\n", |
---|
| 1955 | prim->verts[0].xyz[0], prim->verts[0].xyz[1], prim->text->str); |
---|
| 1956 | break; |
---|
| 1957 | default : |
---|
| 1958 | break; |
---|
| 1959 | } |
---|
| 1960 | } |
---|
| 1961 | |
---|
| 1962 | void gl2psPrintTeXFooter(void){ |
---|
| 1963 | fprintf(gl2ps->stream, "\\end{picture}%s\n", |
---|
| 1964 | (gl2ps->options & GL2PS_LANDSCAPE) ? "}" : ""); |
---|
| 1965 | } |
---|
| 1966 | |
---|
| 1967 | void gl2psPrintTeXBeginViewport(GLint){ |
---|
| 1968 | } |
---|
| 1969 | |
---|
| 1970 | GLint gl2psPrintTeXEndViewport(void){ |
---|
| 1971 | return GL2PS_SUCCESS; |
---|
| 1972 | } |
---|
| 1973 | |
---|
| 1974 | /* The general primitive printing routine */ |
---|
| 1975 | |
---|
| 1976 | GLint gl2psPrintPrimitives(void){ |
---|
| 1977 | GL2PSbsptree *root; |
---|
| 1978 | GL2PSxyz eye = {0., 0., 100000.}; |
---|
| 1979 | GLint shademodel, res; |
---|
| 1980 | void (*pprim)(void *a, void *b) = 0; |
---|
| 1981 | |
---|
| 1982 | glGetIntegerv(GL_SHADE_MODEL, &shademodel); |
---|
| 1983 | gl2ps->shade = (shademodel == GL_SMOOTH); |
---|
| 1984 | |
---|
| 1985 | if(gl2ps->format == GL2PS_TEX){ |
---|
| 1986 | res = GL2PS_SUCCESS; |
---|
| 1987 | } |
---|
| 1988 | else{ |
---|
| 1989 | res = gl2psParseFeedbackBuffer(); |
---|
| 1990 | } |
---|
| 1991 | |
---|
| 1992 | if(res == GL2PS_SUCCESS){ |
---|
| 1993 | |
---|
| 1994 | switch(gl2ps->format){ |
---|
| 1995 | case GL2PS_TEX : |
---|
| 1996 | pprim = gl2psPrintTeXPrimitive; |
---|
| 1997 | break; |
---|
| 1998 | case GL2PS_PS : |
---|
| 1999 | case GL2PS_EPS : |
---|
| 2000 | pprim = gl2psPrintPostScriptPrimitive; |
---|
| 2001 | break; |
---|
| 2002 | } |
---|
| 2003 | |
---|
| 2004 | switch(gl2ps->sort){ |
---|
| 2005 | case GL2PS_NO_SORT : |
---|
| 2006 | gl2psListAction(gl2ps->primitives, pprim); |
---|
| 2007 | gl2psListAction(gl2ps->primitives, gl2psFreePrimitive); |
---|
| 2008 | /* reset the primitive list, waiting for the next viewport */ |
---|
| 2009 | gl2psListReset(gl2ps->primitives); |
---|
| 2010 | break; |
---|
| 2011 | case GL2PS_SIMPLE_SORT : |
---|
| 2012 | gl2psListSort(gl2ps->primitives, gl2psCompareDepth); |
---|
| 2013 | if(gl2ps->options & GL2PS_OCCLUSION_CULL){ |
---|
| 2014 | gl2psListAction(gl2ps->primitives, gl2psAddInImageTree); |
---|
| 2015 | gl2psFreeBspImageTree(&gl2ps->imagetree); |
---|
| 2016 | } |
---|
| 2017 | gl2psListActionInverse(gl2ps->primitives, pprim); |
---|
| 2018 | gl2psListAction(gl2ps->primitives, gl2psFreePrimitive); |
---|
| 2019 | /* reset the primitive list, waiting for the next viewport */ |
---|
| 2020 | gl2psListReset(gl2ps->primitives); |
---|
| 2021 | break; |
---|
| 2022 | case GL2PS_BSP_SORT : |
---|
| 2023 | root = (GL2PSbsptree*)gl2psMalloc(sizeof(GL2PSbsptree)); |
---|
| 2024 | gl2psBuildBspTree(root, gl2ps->primitives); |
---|
| 2025 | if(gl2ps->boundary) gl2psBuildPolygonBoundary(root); |
---|
| 2026 | if(gl2ps->options & GL2PS_OCCLUSION_CULL){ |
---|
| 2027 | gl2psTraverseBspTree(root, eye, -(float)GL2PS_EPSILON, gl2psLess, |
---|
| 2028 | gl2psAddInImageTree); |
---|
| 2029 | gl2psFreeBspImageTree(&gl2ps->imagetree); |
---|
| 2030 | } |
---|
| 2031 | gl2psTraverseBspTree(root, eye, (float)GL2PS_EPSILON, gl2psGreater, |
---|
| 2032 | pprim); |
---|
| 2033 | gl2psFreeBspTree(&root); |
---|
| 2034 | /* reallocate the primitive list (it's been deleted by |
---|
| 2035 | gl2psBuildBspTree) in case there is another viewport */ |
---|
| 2036 | gl2ps->primitives = gl2psListCreate(500, 500, sizeof(GL2PSprimitive*)); |
---|
| 2037 | break; |
---|
| 2038 | default : |
---|
| 2039 | gl2psMsg(GL2PS_ERROR, "Unknown sorting algorithm: %d", gl2ps->sort); |
---|
| 2040 | res = GL2PS_ERROR; |
---|
| 2041 | break; |
---|
| 2042 | } |
---|
| 2043 | fflush(gl2ps->stream); |
---|
| 2044 | |
---|
| 2045 | } |
---|
| 2046 | |
---|
| 2047 | return res; |
---|
| 2048 | } |
---|
| 2049 | |
---|
| 2050 | /* The public routines */ |
---|
| 2051 | |
---|
| 2052 | GL2PSDLL_API GLint gl2psBeginPage(const char *title, const char *producer, |
---|
| 2053 | GLint viewport[4], GLint format, GLint sort, |
---|
| 2054 | GLint options, GLint colormode, |
---|
| 2055 | GLint colorsize, GL2PSrgba *colormap, |
---|
| 2056 | GLint nr, GLint ng, GLint nb, GLint buffersize, |
---|
| 2057 | FILE *stream, const char *filename){ |
---|
| 2058 | int i; |
---|
| 2059 | |
---|
| 2060 | gl2ps = (GL2PScontext*)gl2psMalloc(sizeof(GL2PScontext)); |
---|
| 2061 | gl2ps->maxbestroot = 10; |
---|
| 2062 | gl2ps->format = format; |
---|
| 2063 | gl2ps->title = title; |
---|
| 2064 | gl2ps->producer = producer; |
---|
| 2065 | gl2ps->filename = filename; |
---|
| 2066 | gl2ps->sort = sort; |
---|
| 2067 | gl2ps->options = options; |
---|
| 2068 | for(i = 0; i < 4; i++){ |
---|
| 2069 | gl2ps->viewport[i] = viewport[i]; |
---|
| 2070 | } |
---|
| 2071 | gl2ps->threshold[0] = nr ? 1./(GLfloat)nr : 0.032; |
---|
| 2072 | gl2ps->threshold[1] = ng ? 1./(GLfloat)ng : 0.017; |
---|
| 2073 | gl2ps->threshold[2] = nb ? 1./(GLfloat)nb : 0.05; |
---|
| 2074 | gl2ps->colormode = colormode; |
---|
| 2075 | gl2ps->buffersize = buffersize > 0 ? buffersize : 2048 * 2048; |
---|
| 2076 | for(i = 0; i < 4; i++){ |
---|
| 2077 | gl2ps->lastrgba[i] = -1.; |
---|
| 2078 | } |
---|
| 2079 | gl2ps->lastlinewidth = -1.; |
---|
| 2080 | gl2ps->imagetree = NULL; |
---|
| 2081 | |
---|
| 2082 | if(gl2ps->colormode == GL_RGBA){ |
---|
| 2083 | gl2ps->colorsize = 0; |
---|
| 2084 | gl2ps->colormap = NULL; |
---|
| 2085 | } |
---|
| 2086 | else if(gl2ps->colormode == GL_COLOR_INDEX){ |
---|
| 2087 | if(!colorsize || !colormap){ |
---|
| 2088 | gl2psMsg(GL2PS_ERROR, "Missing colormap for GL_COLOR_INDEX rendering"); |
---|
| 2089 | gl2psFree(gl2ps); |
---|
| 2090 | gl2ps = NULL; |
---|
| 2091 | return GL2PS_ERROR; |
---|
| 2092 | } |
---|
| 2093 | gl2ps->colorsize = colorsize; |
---|
| 2094 | gl2ps->colormap = (GL2PSrgba*)gl2psMalloc(gl2ps->colorsize * sizeof(GL2PSrgba)); |
---|
| 2095 | memcpy(gl2ps->colormap, colormap, gl2ps->colorsize * sizeof(GL2PSrgba)); |
---|
| 2096 | } |
---|
| 2097 | else{ |
---|
| 2098 | gl2psMsg(GL2PS_ERROR, "Unknown color mode in gl2psBeginPage"); |
---|
| 2099 | gl2psFree(gl2ps); |
---|
| 2100 | gl2ps = NULL; |
---|
| 2101 | return GL2PS_ERROR; |
---|
| 2102 | } |
---|
| 2103 | |
---|
| 2104 | if(!stream){ |
---|
| 2105 | gl2psMsg(GL2PS_ERROR, "Bad file pointer"); |
---|
| 2106 | gl2psFree(gl2ps); |
---|
| 2107 | gl2ps = NULL; |
---|
| 2108 | return GL2PS_ERROR; |
---|
| 2109 | } |
---|
| 2110 | else{ |
---|
| 2111 | gl2ps->stream = stream; |
---|
| 2112 | /* In case gl2psEndPage failed (e.g. due to a GL2PS_OVERFLOW) and |
---|
| 2113 | we didn't reopen the stream before calling gl2psBeginPage |
---|
| 2114 | again, we need to rewind the stream */ |
---|
| 2115 | rewind(gl2ps->stream); |
---|
| 2116 | } |
---|
| 2117 | |
---|
| 2118 | switch(gl2ps->format){ |
---|
| 2119 | case GL2PS_TEX : |
---|
| 2120 | gl2psPrintTeXHeader(); |
---|
| 2121 | break; |
---|
| 2122 | case GL2PS_PS : |
---|
| 2123 | case GL2PS_EPS : |
---|
| 2124 | gl2psPrintPostScriptHeader(); |
---|
| 2125 | break; |
---|
| 2126 | default : |
---|
| 2127 | gl2psMsg(GL2PS_ERROR, "Unknown output format: %d", gl2ps->format); |
---|
| 2128 | gl2psFree(gl2ps); |
---|
| 2129 | gl2ps = NULL; |
---|
| 2130 | return GL2PS_ERROR; |
---|
| 2131 | } |
---|
| 2132 | |
---|
| 2133 | gl2ps->primitives = gl2psListCreate(500, 500, sizeof(GL2PSprimitive*)); |
---|
| 2134 | gl2ps->feedback = (GLfloat*)gl2psMalloc(gl2ps->buffersize * sizeof(GLfloat)); |
---|
| 2135 | glFeedbackBuffer(gl2ps->buffersize, GL_3D_COLOR, gl2ps->feedback); |
---|
| 2136 | glRenderMode(GL_FEEDBACK); |
---|
| 2137 | |
---|
| 2138 | return GL2PS_SUCCESS; |
---|
| 2139 | } |
---|
| 2140 | |
---|
| 2141 | GL2PSDLL_API GLint gl2psEndPage(void){ |
---|
| 2142 | GLint res; |
---|
| 2143 | |
---|
| 2144 | if(!gl2ps) return GL2PS_UNINITIALIZED; |
---|
| 2145 | |
---|
| 2146 | res = gl2psPrintPrimitives(); |
---|
| 2147 | |
---|
| 2148 | /* print the footer even if gl2psPrintPrimitives didn't succeed, so |
---|
| 2149 | that we end up with a valid file */ |
---|
| 2150 | switch(gl2ps->format){ |
---|
| 2151 | case GL2PS_TEX : |
---|
| 2152 | gl2psPrintTeXFooter(); |
---|
| 2153 | break; |
---|
| 2154 | case GL2PS_PS : |
---|
| 2155 | case GL2PS_EPS : |
---|
| 2156 | gl2psPrintPostScriptFooter(); |
---|
| 2157 | break; |
---|
| 2158 | } |
---|
| 2159 | |
---|
| 2160 | fflush(gl2ps->stream); |
---|
| 2161 | |
---|
| 2162 | gl2psListDelete(gl2ps->primitives); |
---|
| 2163 | gl2psFree(gl2ps->colormap); |
---|
| 2164 | gl2psFree(gl2ps->feedback); |
---|
| 2165 | gl2psFree(gl2ps); |
---|
| 2166 | gl2ps = NULL; |
---|
| 2167 | |
---|
| 2168 | return res; |
---|
| 2169 | } |
---|
| 2170 | |
---|
| 2171 | GL2PSDLL_API GLint gl2psBeginViewport(GLint viewport[4]){ |
---|
| 2172 | if(!gl2ps) return GL2PS_UNINITIALIZED; |
---|
| 2173 | |
---|
| 2174 | switch(gl2ps->format){ |
---|
| 2175 | case GL2PS_EPS : |
---|
| 2176 | gl2psPrintPostScriptBeginViewport(viewport); |
---|
| 2177 | break; |
---|
| 2178 | default : |
---|
| 2179 | /* FIXME: handle other formats */ |
---|
| 2180 | break; |
---|
| 2181 | } |
---|
| 2182 | |
---|
| 2183 | return GL2PS_SUCCESS; |
---|
| 2184 | } |
---|
| 2185 | |
---|
| 2186 | GL2PSDLL_API GLint gl2psEndViewport(void){ |
---|
| 2187 | GLint res; |
---|
| 2188 | |
---|
| 2189 | if(!gl2ps) return GL2PS_UNINITIALIZED; |
---|
| 2190 | |
---|
| 2191 | switch(gl2ps->format){ |
---|
| 2192 | case GL2PS_EPS : |
---|
| 2193 | res = gl2psPrintPostScriptEndViewport(); |
---|
| 2194 | break; |
---|
| 2195 | default : |
---|
| 2196 | /* FIXME: handle other formats */ |
---|
| 2197 | res = GL2PS_SUCCESS; |
---|
| 2198 | break; |
---|
| 2199 | } |
---|
| 2200 | |
---|
| 2201 | return res; |
---|
| 2202 | } |
---|
| 2203 | |
---|
| 2204 | GL2PSDLL_API GLint gl2psText(const char *str, const char *fontname, GLshort fontsize){ |
---|
| 2205 | GLfloat pos[4]; |
---|
| 2206 | GL2PSprimitive *prim; |
---|
| 2207 | GLboolean valid; |
---|
| 2208 | |
---|
| 2209 | if(!gl2ps || !str) return GL2PS_UNINITIALIZED; |
---|
| 2210 | |
---|
| 2211 | if(gl2ps->options & GL2PS_NO_TEXT) return GL2PS_SUCCESS; |
---|
| 2212 | |
---|
| 2213 | glGetBooleanv(GL_CURRENT_RASTER_POSITION_VALID, &valid); |
---|
| 2214 | if(!valid) return GL2PS_SUCCESS; /* the primitive is culled */ |
---|
| 2215 | |
---|
| 2216 | glGetFloatv(GL_CURRENT_RASTER_POSITION, pos); |
---|
| 2217 | |
---|
| 2218 | prim = (GL2PSprimitive *)gl2psMalloc(sizeof(GL2PSprimitive)); |
---|
| 2219 | prim->type = GL2PS_TEXT; |
---|
| 2220 | prim->boundary = 0; |
---|
| 2221 | prim->numverts = 1; |
---|
| 2222 | prim->verts = (GL2PSvertex *)gl2psMalloc(sizeof(GL2PSvertex)); |
---|
| 2223 | prim->verts[0].xyz[0] = pos[0]; |
---|
| 2224 | prim->verts[0].xyz[1] = pos[1]; |
---|
| 2225 | prim->verts[0].xyz[2] = GL2PS_DEPTH_FACT * pos[2]; |
---|
| 2226 | prim->depth = pos[2]; |
---|
| 2227 | prim->culled = 0; |
---|
| 2228 | prim->dash = 0; |
---|
| 2229 | prim->width = 1; |
---|
| 2230 | glGetFloatv(GL_CURRENT_RASTER_COLOR, prim->verts[0].rgba); |
---|
| 2231 | prim->text = (GL2PSstring*)gl2psMalloc(sizeof(GL2PSstring)); |
---|
| 2232 | prim->text->str = (char*)gl2psMalloc((strlen(str)+1)*sizeof(char)); |
---|
| 2233 | strcpy(prim->text->str, str); |
---|
| 2234 | prim->text->fontname = (char*)gl2psMalloc((strlen(fontname)+1)*sizeof(char)); |
---|
| 2235 | strcpy(prim->text->fontname, fontname); |
---|
| 2236 | prim->text->fontsize = fontsize; |
---|
| 2237 | |
---|
| 2238 | gl2psListAdd(gl2ps->primitives, &prim); |
---|
| 2239 | |
---|
| 2240 | return GL2PS_SUCCESS; |
---|
| 2241 | } |
---|
| 2242 | |
---|
| 2243 | GL2PSDLL_API GLint gl2psDrawPixels(GLsizei width, GLsizei height, |
---|
| 2244 | GLint xorig, GLint yorig, |
---|
| 2245 | GLenum format, GLenum type, |
---|
| 2246 | const void *pixels){ |
---|
| 2247 | int size; |
---|
| 2248 | GLfloat pos[4]; |
---|
| 2249 | GL2PSprimitive *prim; |
---|
| 2250 | GLboolean valid; |
---|
| 2251 | |
---|
| 2252 | if(!gl2ps || !pixels) return GL2PS_UNINITIALIZED; |
---|
| 2253 | |
---|
| 2254 | if((width <= 0) || (height <= 0)) return GL2PS_ERROR; |
---|
| 2255 | |
---|
| 2256 | if(gl2ps->options & GL2PS_NO_PIXMAP) return GL2PS_SUCCESS; |
---|
| 2257 | |
---|
| 2258 | if(format != GL_RGB || type != GL_FLOAT){ |
---|
| 2259 | gl2psMsg(GL2PS_ERROR, "gl2psDrawPixels only implemented for GL_RGB, GL_FLOAT pixels"); |
---|
| 2260 | return GL2PS_ERROR; |
---|
| 2261 | } |
---|
| 2262 | |
---|
| 2263 | glGetBooleanv(GL_CURRENT_RASTER_POSITION_VALID, &valid); |
---|
| 2264 | if(!valid) return GL2PS_SUCCESS; /* the primitive is culled */ |
---|
| 2265 | |
---|
| 2266 | glGetFloatv(GL_CURRENT_RASTER_POSITION, pos); |
---|
| 2267 | |
---|
| 2268 | prim = (GL2PSprimitive *)gl2psMalloc(sizeof(GL2PSprimitive)); |
---|
| 2269 | prim->type = GL2PS_PIXMAP; |
---|
| 2270 | prim->boundary = 0; |
---|
| 2271 | prim->numverts = 1; |
---|
| 2272 | prim->verts = (GL2PSvertex *)gl2psMalloc(sizeof(GL2PSvertex)); |
---|
| 2273 | prim->verts[0].xyz[0] = pos[0] + xorig; |
---|
| 2274 | prim->verts[0].xyz[1] = pos[1] + yorig; |
---|
| 2275 | prim->verts[0].xyz[2] = GL2PS_DEPTH_FACT * pos[2]; |
---|
| 2276 | prim->depth = pos[2]; |
---|
| 2277 | prim->culled = 0; |
---|
| 2278 | prim->dash = 0; |
---|
| 2279 | prim->width = 1; |
---|
| 2280 | glGetFloatv(GL_CURRENT_RASTER_COLOR, prim->verts[0].rgba); |
---|
| 2281 | prim->image = (GL2PSimage*)gl2psMalloc(sizeof(GL2PSimage)); |
---|
| 2282 | prim->image->width = width; |
---|
| 2283 | prim->image->height = height; |
---|
| 2284 | prim->image->format = format; |
---|
| 2285 | prim->image->type = type; |
---|
| 2286 | size = height*width*3*sizeof(GLfloat); /* FIXME: generalize to other types/formats */ |
---|
| 2287 | prim->image->pixels = (GLfloat*)gl2psMalloc(size); |
---|
| 2288 | memcpy(prim->image->pixels, pixels, size); |
---|
| 2289 | |
---|
| 2290 | gl2psListAdd(gl2ps->primitives, &prim); |
---|
| 2291 | |
---|
| 2292 | return GL2PS_SUCCESS; |
---|
| 2293 | } |
---|
| 2294 | |
---|
| 2295 | GL2PSDLL_API GLint gl2psEnable(GLint mode){ |
---|
| 2296 | if(!gl2ps) return GL2PS_UNINITIALIZED; |
---|
| 2297 | |
---|
| 2298 | switch(mode){ |
---|
| 2299 | case GL2PS_POLYGON_OFFSET_FILL : |
---|
| 2300 | glPassThrough(GL2PS_BEGIN_POLYGON_OFFSET_FILL); |
---|
| 2301 | glGetFloatv(GL_POLYGON_OFFSET_FACTOR, &gl2ps->offset[0]); |
---|
| 2302 | glGetFloatv(GL_POLYGON_OFFSET_UNITS, &gl2ps->offset[1]); |
---|
| 2303 | break; |
---|
| 2304 | case GL2PS_POLYGON_BOUNDARY : |
---|
| 2305 | glPassThrough(GL2PS_BEGIN_POLYGON_BOUNDARY); |
---|
| 2306 | break; |
---|
| 2307 | case GL2PS_LINE_STIPPLE : |
---|
| 2308 | glPassThrough(GL2PS_BEGIN_LINE_STIPPLE); |
---|
| 2309 | break; |
---|
| 2310 | default : |
---|
| 2311 | gl2psMsg(GL2PS_WARNING, "Unknown mode in gl2psEnable: %d", mode); |
---|
| 2312 | return GL2PS_WARNING; |
---|
| 2313 | } |
---|
| 2314 | |
---|
| 2315 | return GL2PS_SUCCESS; |
---|
| 2316 | } |
---|
| 2317 | |
---|
| 2318 | GL2PSDLL_API GLint gl2psDisable(GLint mode){ |
---|
| 2319 | if(!gl2ps) return GL2PS_UNINITIALIZED; |
---|
| 2320 | |
---|
| 2321 | switch(mode){ |
---|
| 2322 | case GL2PS_POLYGON_OFFSET_FILL : |
---|
| 2323 | glPassThrough(GL2PS_END_POLYGON_OFFSET_FILL); |
---|
| 2324 | break; |
---|
| 2325 | case GL2PS_POLYGON_BOUNDARY : |
---|
| 2326 | glPassThrough(GL2PS_END_POLYGON_BOUNDARY); |
---|
| 2327 | break; |
---|
| 2328 | case GL2PS_LINE_STIPPLE : |
---|
| 2329 | glPassThrough(GL2PS_END_LINE_STIPPLE); |
---|
| 2330 | break; |
---|
| 2331 | default : |
---|
| 2332 | gl2psMsg(GL2PS_WARNING, "Unknown mode in gl2psDisable: %d", mode); |
---|
| 2333 | return GL2PS_WARNING; |
---|
| 2334 | } |
---|
| 2335 | |
---|
| 2336 | return GL2PS_SUCCESS; |
---|
| 2337 | } |
---|
| 2338 | |
---|
| 2339 | GL2PSDLL_API GLint gl2psPointSize(GLfloat value){ |
---|
| 2340 | if(!gl2ps) return GL2PS_UNINITIALIZED; |
---|
| 2341 | |
---|
| 2342 | glPassThrough(GL2PS_SET_POINT_SIZE); |
---|
| 2343 | glPassThrough(value); |
---|
| 2344 | |
---|
| 2345 | return GL2PS_SUCCESS; |
---|
| 2346 | } |
---|
| 2347 | |
---|
| 2348 | GL2PSDLL_API GLint gl2psLineWidth(GLfloat value){ |
---|
| 2349 | if(!gl2ps) return GL2PS_UNINITIALIZED; |
---|
| 2350 | |
---|
| 2351 | glPassThrough(GL2PS_SET_LINE_WIDTH); |
---|
| 2352 | glPassThrough(value); |
---|
| 2353 | |
---|
| 2354 | return GL2PS_SUCCESS; |
---|
| 2355 | } |
---|
| 2356 | |
---|
| 2357 | #endif |
---|