1 | /* |
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2 | * GL2PS, an OpenGL to PostScript Printing Library |
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3 | * Copyright (C) 1999-2009 C. Geuzaine |
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4 | * |
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5 | * This program is free software; you can redistribute it and/or |
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6 | * modify it under the terms of either: |
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7 | * |
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8 | * a) the GNU Library General Public License as published by the Free |
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9 | * Software Foundation, either version 2 of the License, or (at your |
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10 | * option) any later version; or |
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11 | * |
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12 | * b) the GL2PS License as published by Christophe Geuzaine, either |
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13 | * version 2 of the License, or (at your option) any later version. |
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14 | * |
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15 | * This program is distributed in the hope that it will be useful, but |
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16 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
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17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See either |
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18 | * the GNU Library General Public License or the GL2PS License for |
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19 | * more details. |
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20 | * |
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21 | * You should have received a copy of the GNU Library General Public |
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22 | * License along with this library in the file named "COPYING.LGPL"; |
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23 | * if not, write to the Free Software Foundation, Inc., 675 Mass Ave, |
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24 | * Cambridge, MA 02139, USA. |
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25 | * |
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26 | * You should have received a copy of the GL2PS License with this |
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27 | * library in the file named "COPYING.GL2PS"; if not, I will be glad |
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28 | * to provide one. |
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29 | * |
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30 | * For the latest info about gl2ps and a full list of contributors, |
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31 | * see http://www.geuz.org/gl2ps/. |
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32 | * |
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33 | * Please report all bugs and problems to <gl2ps@geuz.org>. |
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34 | */ |
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35 | |
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36 | #include "gl2ps.h" |
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37 | |
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38 | #include <math.h> |
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39 | #include <string.h> |
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40 | #include <sys/types.h> |
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41 | #include <stdarg.h> |
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42 | #include <time.h> |
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43 | #include <float.h> |
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44 | |
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45 | #if defined(GL2PS_HAVE_ZLIB) |
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46 | #include <zlib.h> |
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47 | #endif |
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48 | |
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49 | #if defined(GL2PS_HAVE_LIBPNG) |
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50 | #include <png.h> |
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51 | #endif |
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52 | |
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53 | /********************************************************************* |
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54 | * |
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55 | * Private definitions, data structures and prototypes |
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56 | * |
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57 | *********************************************************************/ |
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58 | |
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59 | /* Magic numbers (assuming that the order of magnitude of window |
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60 | coordinates is 10^3) */ |
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61 | |
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62 | #define GL2PS_EPSILON 5.0e-3F |
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63 | #define GL2PS_ZSCALE 1000.0F |
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64 | #define GL2PS_ZOFFSET 5.0e-2F |
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65 | #define GL2PS_ZOFFSET_LARGE 20.0F |
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66 | #define GL2PS_ZERO(arg) (fabs(arg) < 1.e-20) |
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67 | |
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68 | /* Primitive types */ |
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69 | |
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70 | #define GL2PS_NO_TYPE -1 |
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71 | #define GL2PS_TEXT 1 |
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72 | #define GL2PS_POINT 2 |
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73 | #define GL2PS_LINE 3 |
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74 | #define GL2PS_QUADRANGLE 4 |
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75 | #define GL2PS_TRIANGLE 5 |
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76 | #define GL2PS_PIXMAP 6 |
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77 | #define GL2PS_IMAGEMAP 7 |
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78 | #define GL2PS_IMAGEMAP_WRITTEN 8 |
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79 | #define GL2PS_IMAGEMAP_VISIBLE 9 |
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80 | #define GL2PS_SPECIAL 10 |
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81 | |
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82 | /* BSP tree primitive comparison */ |
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83 | |
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84 | #define GL2PS_COINCIDENT 1 |
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85 | #define GL2PS_IN_FRONT_OF 2 |
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86 | #define GL2PS_IN_BACK_OF 3 |
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87 | #define GL2PS_SPANNING 4 |
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88 | |
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89 | /* 2D BSP tree primitive comparison */ |
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90 | |
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91 | #define GL2PS_POINT_COINCIDENT 0 |
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92 | #define GL2PS_POINT_INFRONT 1 |
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93 | #define GL2PS_POINT_BACK 2 |
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94 | |
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95 | /* Internal feedback buffer pass-through tokens */ |
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96 | |
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97 | #define GL2PS_BEGIN_OFFSET_TOKEN 1 |
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98 | #define GL2PS_END_OFFSET_TOKEN 2 |
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99 | #define GL2PS_BEGIN_BOUNDARY_TOKEN 3 |
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100 | #define GL2PS_END_BOUNDARY_TOKEN 4 |
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101 | #define GL2PS_BEGIN_STIPPLE_TOKEN 5 |
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102 | #define GL2PS_END_STIPPLE_TOKEN 6 |
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103 | #define GL2PS_POINT_SIZE_TOKEN 7 |
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104 | #define GL2PS_LINE_WIDTH_TOKEN 8 |
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105 | #define GL2PS_BEGIN_BLEND_TOKEN 9 |
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106 | #define GL2PS_END_BLEND_TOKEN 10 |
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107 | #define GL2PS_SRC_BLEND_TOKEN 11 |
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108 | #define GL2PS_DST_BLEND_TOKEN 12 |
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109 | #define GL2PS_IMAGEMAP_TOKEN 13 |
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110 | #define GL2PS_DRAW_PIXELS_TOKEN 14 |
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111 | #define GL2PS_TEXT_TOKEN 15 |
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112 | |
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113 | typedef enum { |
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114 | T_UNDEFINED = -1, |
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115 | T_CONST_COLOR = 1, |
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116 | T_VAR_COLOR = 1<<1, |
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117 | T_ALPHA_1 = 1<<2, |
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118 | T_ALPHA_LESS_1 = 1<<3, |
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119 | T_VAR_ALPHA = 1<<4 |
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120 | } GL2PS_TRIANGLE_PROPERTY; |
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121 | |
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122 | typedef GLfloat GL2PSxyz[3]; |
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123 | typedef GLfloat GL2PSplane[4]; |
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124 | |
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125 | typedef struct _GL2PSbsptree2d GL2PSbsptree2d; |
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126 | |
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127 | struct _GL2PSbsptree2d { |
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128 | GL2PSplane plane; |
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129 | GL2PSbsptree2d *front, *back; |
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130 | }; |
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131 | |
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132 | typedef struct { |
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133 | GLint nmax, size, incr, n; |
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134 | char *array; |
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135 | } GL2PSlist; |
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136 | |
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137 | typedef struct _GL2PSbsptree GL2PSbsptree; |
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138 | |
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139 | struct _GL2PSbsptree { |
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140 | GL2PSplane plane; |
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141 | GL2PSlist *primitives; |
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142 | GL2PSbsptree *front, *back; |
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143 | }; |
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144 | |
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145 | typedef struct { |
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146 | GL2PSxyz xyz; |
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147 | GL2PSrgba rgba; |
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148 | } GL2PSvertex; |
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149 | |
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150 | typedef struct { |
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151 | GL2PSvertex vertex[3]; |
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152 | int prop; |
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153 | } GL2PStriangle; |
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154 | |
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155 | typedef struct { |
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156 | GLshort fontsize; |
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157 | char *str, *fontname; |
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158 | /* Note: for a 'special' string, 'alignment' holds the format |
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159 | (PostScript, PDF, etc.) of the special string */ |
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160 | GLint alignment; |
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161 | GLfloat angle; |
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162 | } GL2PSstring; |
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163 | |
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164 | typedef struct { |
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165 | GLsizei width, height; |
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166 | /* Note: for an imagemap, 'type' indicates if it has already been |
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167 | written to the file or not, and 'format' indicates if it is |
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168 | visible or not */ |
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169 | GLenum format, type; |
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170 | GLfloat *pixels; |
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171 | } GL2PSimage; |
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172 | |
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173 | typedef struct _GL2PSimagemap GL2PSimagemap; |
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174 | |
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175 | struct _GL2PSimagemap { |
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176 | GL2PSimage *image; |
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177 | GL2PSimagemap *next; |
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178 | }; |
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179 | |
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180 | typedef struct { |
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181 | GLshort type, numverts; |
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182 | GLushort pattern; |
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183 | char boundary, offset, culled; |
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184 | GLint factor; |
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185 | GLfloat width; |
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186 | GL2PSvertex *verts; |
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187 | union { |
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188 | GL2PSstring *text; |
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189 | GL2PSimage *image; |
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190 | } data; |
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191 | } GL2PSprimitive; |
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192 | |
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193 | typedef struct { |
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194 | #if defined(GL2PS_HAVE_ZLIB) |
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195 | Bytef *dest, *src, *start; |
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196 | uLongf destLen, srcLen; |
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197 | #else |
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198 | int dummy; |
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199 | #endif |
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200 | } GL2PScompress; |
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201 | |
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202 | typedef struct{ |
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203 | GL2PSlist* ptrlist; |
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204 | int gsno, fontno, imno, shno, maskshno, trgroupno; |
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205 | int gsobjno, fontobjno, imobjno, shobjno, maskshobjno, trgroupobjno; |
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206 | } GL2PSpdfgroup; |
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207 | |
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208 | typedef struct { |
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209 | /* General */ |
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210 | GLint format, sort, options, colorsize, colormode, buffersize; |
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211 | char *title, *producer, *filename; |
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212 | GLboolean boundary, blending; |
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213 | GLfloat *feedback, offset[2], lastlinewidth; |
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214 | GLint viewport[4], blendfunc[2], lastfactor; |
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215 | GL2PSrgba *colormap, lastrgba, threshold, bgcolor; |
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216 | GLushort lastpattern; |
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217 | GL2PSvertex lastvertex; |
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218 | GL2PSlist *primitives, *auxprimitives; |
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219 | FILE *stream; |
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220 | GL2PScompress *compress; |
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221 | GLboolean header; |
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222 | |
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223 | /* BSP-specific */ |
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224 | GLint maxbestroot; |
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225 | |
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226 | /* Occlusion culling-specific */ |
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227 | GLboolean zerosurfacearea; |
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228 | GL2PSbsptree2d *imagetree; |
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229 | GL2PSprimitive *primitivetoadd; |
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230 | |
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231 | /* PDF-specific */ |
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232 | int streamlength; |
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233 | GL2PSlist *pdfprimlist, *pdfgrouplist; |
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234 | int *xreflist; |
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235 | int objects_stack; /* available objects */ |
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236 | int extgs_stack; /* graphics state object number */ |
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237 | int font_stack; /* font object number */ |
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238 | int im_stack; /* image object number */ |
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239 | int trgroupobjects_stack; /* xobject numbers */ |
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240 | int shader_stack; /* shader object numbers */ |
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241 | int mshader_stack; /* mask shader object numbers */ |
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242 | |
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243 | /* for image map list */ |
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244 | GL2PSimagemap *imagemap_head; |
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245 | GL2PSimagemap *imagemap_tail; |
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246 | } GL2PScontext; |
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247 | |
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248 | typedef struct { |
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249 | void (*printHeader)(void); |
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250 | void (*printFooter)(void); |
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251 | void (*beginViewport)(GLint viewport[4]); |
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252 | GLint (*endViewport)(void); |
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253 | void (*printPrimitive)(void *data); |
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254 | void (*printFinalPrimitive)(void); |
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255 | const char *file_extension; |
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256 | const char *description; |
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257 | } GL2PSbackend; |
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258 | |
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259 | /* The gl2ps context. gl2ps is not thread safe (we should create a |
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260 | local GL2PScontext during gl2psBeginPage) */ |
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261 | |
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262 | static GL2PScontext *gl2ps = NULL; |
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263 | |
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264 | /* Need to forward-declare this one */ |
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265 | |
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266 | static GLint gl2psPrintPrimitives(void); |
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267 | |
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268 | /********************************************************************* |
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269 | * |
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270 | * Utility routines |
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271 | * |
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272 | *********************************************************************/ |
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273 | |
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274 | static void gl2psMsg(GLint level, const char *fmt, ...) |
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275 | { |
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276 | va_list args; |
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277 | |
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278 | if(!(gl2ps->options & GL2PS_SILENT)){ |
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279 | switch(level){ |
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280 | case GL2PS_INFO : fprintf(stderr, "GL2PS info: "); break; |
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281 | case GL2PS_WARNING : fprintf(stderr, "GL2PS warning: "); break; |
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282 | case GL2PS_ERROR : fprintf(stderr, "GL2PS error: "); break; |
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283 | } |
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284 | va_start(args, fmt); |
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285 | vfprintf(stderr, fmt, args); |
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286 | va_end(args); |
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287 | fprintf(stderr, "\n"); |
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288 | } |
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289 | /* if(level == GL2PS_ERROR) exit(1); */ |
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290 | } |
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291 | |
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292 | static void *gl2psMalloc(size_t size) |
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293 | { |
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294 | void *ptr; |
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295 | |
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296 | if(!size) return NULL; |
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297 | ptr = malloc(size); |
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298 | if(!ptr){ |
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299 | gl2psMsg(GL2PS_ERROR, "Couldn't allocate requested memory"); |
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300 | return NULL; |
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301 | } |
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302 | return ptr; |
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303 | } |
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304 | |
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305 | static void *gl2psRealloc(void *ptr, size_t size) |
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306 | { |
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307 | if(!size) return NULL; |
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308 | ptr = realloc(ptr, size); |
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309 | if(!ptr){ |
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310 | gl2psMsg(GL2PS_ERROR, "Couldn't reallocate requested memory"); |
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311 | return NULL; |
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312 | } |
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313 | return ptr; |
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314 | } |
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315 | |
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316 | static void gl2psFree(void *ptr) |
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317 | { |
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318 | if(!ptr) return; |
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319 | free(ptr); |
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320 | } |
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321 | |
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322 | static size_t gl2psWriteBigEndian(unsigned long data, size_t bytes) |
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323 | { |
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324 | size_t i; |
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325 | size_t size = sizeof(unsigned long); |
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326 | for(i = 1; i <= bytes; ++i){ |
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327 | fputc(0xff & (data >> (size-i) * 8), gl2ps->stream); |
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328 | } |
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329 | return bytes; |
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330 | } |
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331 | |
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332 | /* zlib compression helper routines */ |
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333 | |
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334 | #if defined(GL2PS_HAVE_ZLIB) |
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335 | |
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336 | static void gl2psSetupCompress(void) |
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337 | { |
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338 | gl2ps->compress = (GL2PScompress*)gl2psMalloc(sizeof(GL2PScompress)); |
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339 | gl2ps->compress->src = NULL; |
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340 | gl2ps->compress->start = NULL; |
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341 | gl2ps->compress->dest = NULL; |
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342 | gl2ps->compress->srcLen = 0; |
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343 | gl2ps->compress->destLen = 0; |
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344 | } |
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345 | |
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346 | static void gl2psFreeCompress(void) |
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347 | { |
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348 | if(!gl2ps->compress) |
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349 | return; |
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350 | gl2psFree(gl2ps->compress->start); |
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351 | gl2psFree(gl2ps->compress->dest); |
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352 | gl2ps->compress->src = NULL; |
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353 | gl2ps->compress->start = NULL; |
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354 | gl2ps->compress->dest = NULL; |
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355 | gl2ps->compress->srcLen = 0; |
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356 | gl2ps->compress->destLen = 0; |
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357 | } |
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358 | |
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359 | static int gl2psAllocCompress(unsigned int srcsize) |
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360 | { |
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361 | gl2psFreeCompress(); |
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362 | |
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363 | if(!gl2ps->compress || !srcsize) |
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364 | return GL2PS_ERROR; |
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365 | |
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366 | gl2ps->compress->srcLen = srcsize; |
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367 | gl2ps->compress->destLen = (int)ceil(1.001 * gl2ps->compress->srcLen + 12); |
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368 | gl2ps->compress->src = (Bytef*)gl2psMalloc(gl2ps->compress->srcLen); |
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369 | gl2ps->compress->start = gl2ps->compress->src; |
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370 | gl2ps->compress->dest = (Bytef*)gl2psMalloc(gl2ps->compress->destLen); |
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371 | |
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372 | return GL2PS_SUCCESS; |
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373 | } |
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374 | |
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375 | static void *gl2psReallocCompress(unsigned int srcsize) |
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376 | { |
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377 | if(!gl2ps->compress || !srcsize) |
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378 | return NULL; |
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379 | |
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380 | if(srcsize < gl2ps->compress->srcLen) |
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381 | return gl2ps->compress->start; |
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382 | |
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383 | gl2ps->compress->srcLen = srcsize; |
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384 | gl2ps->compress->destLen = (int)ceil(1.001 * gl2ps->compress->srcLen + 12); |
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385 | gl2ps->compress->src = (Bytef*)gl2psRealloc(gl2ps->compress->src, |
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386 | gl2ps->compress->srcLen); |
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387 | gl2ps->compress->start = gl2ps->compress->src; |
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388 | gl2ps->compress->dest = (Bytef*)gl2psRealloc(gl2ps->compress->dest, |
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389 | gl2ps->compress->destLen); |
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390 | |
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391 | return gl2ps->compress->start; |
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392 | } |
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393 | |
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394 | static size_t gl2psWriteBigEndianCompress(unsigned long data, size_t bytes) |
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395 | { |
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396 | size_t i; |
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397 | size_t size = sizeof(unsigned long); |
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398 | for(i = 1; i <= bytes; ++i){ |
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399 | *gl2ps->compress->src = (Bytef)(0xff & (data >> (size-i) * 8)); |
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400 | ++gl2ps->compress->src; |
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401 | } |
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402 | return bytes; |
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403 | } |
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404 | |
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405 | static int gl2psDeflate(void) |
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406 | { |
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407 | /* For compatibility with older zlib versions, we use compress(...) |
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408 | instead of compress2(..., Z_BEST_COMPRESSION) */ |
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409 | return compress(gl2ps->compress->dest, &gl2ps->compress->destLen, |
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410 | gl2ps->compress->start, gl2ps->compress->srcLen); |
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411 | } |
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412 | |
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413 | #endif |
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414 | |
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415 | static int gl2psPrintf(const char* fmt, ...) |
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416 | { |
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417 | int ret; |
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418 | va_list args; |
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419 | |
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420 | #if defined(GL2PS_HAVE_ZLIB) |
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421 | unsigned int oldsize = 0; |
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422 | static char buf[1000]; |
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423 | if(gl2ps->options & GL2PS_COMPRESS){ |
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424 | va_start(args, fmt); |
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425 | ret = vsprintf(buf, fmt, args); |
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426 | va_end(args); |
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427 | oldsize = gl2ps->compress->srcLen; |
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428 | gl2ps->compress->start = (Bytef*)gl2psReallocCompress(oldsize + ret); |
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429 | memcpy(gl2ps->compress->start+oldsize, buf, ret); |
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430 | ret = 0; |
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431 | } |
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432 | else{ |
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433 | #endif |
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434 | va_start(args, fmt); |
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435 | ret = vfprintf(gl2ps->stream, fmt, args); |
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436 | va_end(args); |
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437 | #if defined(GL2PS_HAVE_ZLIB) |
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438 | } |
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439 | #endif |
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440 | return ret; |
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441 | } |
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442 | |
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443 | static void gl2psPrintGzipHeader() |
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444 | { |
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445 | #if defined(GL2PS_HAVE_ZLIB) |
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446 | char tmp[10] = {'\x1f', '\x8b', /* magic numbers: 0x1f, 0x8b */ |
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447 | 8, /* compression method: Z_DEFLATED */ |
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448 | 0, /* flags */ |
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449 | 0, 0, 0, 0, /* time */ |
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450 | 2, /* extra flags: max compression */ |
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451 | '\x03'}; /* OS code: 0x03 (Unix) */ |
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452 | |
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453 | if(gl2ps->options & GL2PS_COMPRESS){ |
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454 | gl2psSetupCompress(); |
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455 | /* add the gzip file header */ |
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456 | fwrite(tmp, 10, 1, gl2ps->stream); |
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457 | } |
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458 | #endif |
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459 | } |
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460 | |
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461 | static void gl2psPrintGzipFooter() |
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462 | { |
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463 | #if defined(GL2PS_HAVE_ZLIB) |
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464 | int n; |
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465 | uLong crc, len; |
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466 | char tmp[8]; |
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467 | |
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468 | if(gl2ps->options & GL2PS_COMPRESS){ |
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469 | if(Z_OK != gl2psDeflate()){ |
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470 | gl2psMsg(GL2PS_ERROR, "Zlib deflate error"); |
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471 | } |
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472 | else{ |
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473 | /* determine the length of the header in the zlib stream */ |
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474 | n = 2; /* CMF+FLG */ |
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475 | if(gl2ps->compress->dest[1] & (1<<5)){ |
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476 | n += 4; /* DICTID */ |
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477 | } |
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478 | /* write the data, without the zlib header and footer */ |
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479 | fwrite(gl2ps->compress->dest+n, gl2ps->compress->destLen-(n+4), |
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480 | 1, gl2ps->stream); |
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481 | /* add the gzip file footer */ |
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482 | crc = crc32(0L, gl2ps->compress->start, gl2ps->compress->srcLen); |
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483 | for(n = 0; n < 4; ++n){ |
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484 | tmp[n] = (char)(crc & 0xff); |
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485 | crc >>= 8; |
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486 | } |
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487 | len = gl2ps->compress->srcLen; |
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488 | for(n = 4; n < 8; ++n){ |
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489 | tmp[n] = (char)(len & 0xff); |
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490 | len >>= 8; |
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491 | } |
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492 | fwrite(tmp, 8, 1, gl2ps->stream); |
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493 | } |
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494 | gl2psFreeCompress(); |
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495 | gl2psFree(gl2ps->compress); |
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496 | gl2ps->compress = NULL; |
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497 | } |
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498 | #endif |
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499 | } |
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500 | |
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501 | /* The list handling routines */ |
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502 | |
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503 | static void gl2psListRealloc(GL2PSlist *list, GLint n) |
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504 | { |
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505 | if(!list){ |
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506 | gl2psMsg(GL2PS_ERROR, "Cannot reallocate NULL list"); |
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507 | return; |
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508 | } |
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509 | if(n <= 0) return; |
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510 | if(!list->array){ |
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511 | list->nmax = n; |
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512 | list->array = (char*)gl2psMalloc(list->nmax * list->size); |
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513 | } |
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514 | else{ |
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515 | if(n > list->nmax){ |
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516 | list->nmax = ((n - 1) / list->incr + 1) * list->incr; |
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517 | list->array = (char*)gl2psRealloc(list->array, |
---|
518 | list->nmax * list->size); |
---|
519 | } |
---|
520 | } |
---|
521 | } |
---|
522 | |
---|
523 | static GL2PSlist *gl2psListCreate(GLint n, GLint incr, GLint size) |
---|
524 | { |
---|
525 | GL2PSlist *list; |
---|
526 | |
---|
527 | if(n < 0) n = 0; |
---|
528 | if(incr <= 0) incr = 1; |
---|
529 | list = (GL2PSlist*)gl2psMalloc(sizeof(GL2PSlist)); |
---|
530 | list->nmax = 0; |
---|
531 | list->incr = incr; |
---|
532 | list->size = size; |
---|
533 | list->n = 0; |
---|
534 | list->array = NULL; |
---|
535 | gl2psListRealloc(list, n); |
---|
536 | return list; |
---|
537 | } |
---|
538 | |
---|
539 | static void gl2psListReset(GL2PSlist *list) |
---|
540 | { |
---|
541 | if(!list) return; |
---|
542 | list->n = 0; |
---|
543 | } |
---|
544 | |
---|
545 | static void gl2psListDelete(GL2PSlist *list) |
---|
546 | { |
---|
547 | if(!list) return; |
---|
548 | gl2psFree(list->array); |
---|
549 | gl2psFree(list); |
---|
550 | } |
---|
551 | |
---|
552 | static void gl2psListAdd(GL2PSlist *list, void *data) |
---|
553 | { |
---|
554 | if(!list){ |
---|
555 | gl2psMsg(GL2PS_ERROR, "Cannot add into unallocated list"); |
---|
556 | return; |
---|
557 | } |
---|
558 | list->n++; |
---|
559 | gl2psListRealloc(list, list->n); |
---|
560 | memcpy(&list->array[(list->n - 1) * list->size], data, list->size); |
---|
561 | } |
---|
562 | |
---|
563 | static int gl2psListNbr(GL2PSlist *list) |
---|
564 | { |
---|
565 | if(!list) |
---|
566 | return 0; |
---|
567 | return list->n; |
---|
568 | } |
---|
569 | |
---|
570 | static void *gl2psListPointer(GL2PSlist *list, GLint index) |
---|
571 | { |
---|
572 | if(!list){ |
---|
573 | gl2psMsg(GL2PS_ERROR, "Cannot point into unallocated list"); |
---|
574 | return NULL; |
---|
575 | } |
---|
576 | if((index < 0) || (index >= list->n)){ |
---|
577 | gl2psMsg(GL2PS_ERROR, "Wrong list index in gl2psListPointer"); |
---|
578 | return NULL; |
---|
579 | } |
---|
580 | return &list->array[index * list->size]; |
---|
581 | } |
---|
582 | |
---|
583 | static void gl2psListSort(GL2PSlist *list, |
---|
584 | int (*fcmp)(const void *a, const void *b)) |
---|
585 | { |
---|
586 | if(!list) |
---|
587 | return; |
---|
588 | qsort(list->array, list->n, list->size, fcmp); |
---|
589 | } |
---|
590 | |
---|
591 | static void gl2psListAction(GL2PSlist *list, void (*action)(void *data)) |
---|
592 | { |
---|
593 | GLint i; |
---|
594 | |
---|
595 | for(i = 0; i < gl2psListNbr(list); i++){ |
---|
596 | (*action)(gl2psListPointer(list, i)); |
---|
597 | } |
---|
598 | } |
---|
599 | |
---|
600 | static void gl2psListActionInverse(GL2PSlist *list, void (*action)(void *data)) |
---|
601 | { |
---|
602 | GLint i; |
---|
603 | |
---|
604 | for(i = gl2psListNbr(list); i > 0; i--){ |
---|
605 | (*action)(gl2psListPointer(list, i-1)); |
---|
606 | } |
---|
607 | } |
---|
608 | |
---|
609 | #if defined(GL2PS_HAVE_LIBPNG) |
---|
610 | |
---|
611 | static void gl2psListRead(GL2PSlist *list, int index, void *data) |
---|
612 | { |
---|
613 | if((index < 0) || (index >= list->n)) |
---|
614 | gl2psMsg(GL2PS_ERROR, "Wrong list index in gl2psListRead"); |
---|
615 | memcpy(data, &list->array[index * list->size], list->size); |
---|
616 | } |
---|
617 | |
---|
618 | static void gl2psEncodeBase64Block(unsigned char in[3], unsigned char out[4], int len) |
---|
619 | { |
---|
620 | static const char cb64[] = |
---|
621 | "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; |
---|
622 | |
---|
623 | out[0] = cb64[ in[0] >> 2 ]; |
---|
624 | out[1] = cb64[ ((in[0] & 0x03) << 4) | ((in[1] & 0xf0) >> 4) ]; |
---|
625 | out[2] = (len > 1) ? cb64[ ((in[1] & 0x0f) << 2) | ((in[2] & 0xc0) >> 6) ] : '='; |
---|
626 | out[3] = (len > 2) ? cb64[ in[2] & 0x3f ] : '='; |
---|
627 | } |
---|
628 | |
---|
629 | static void gl2psListEncodeBase64(GL2PSlist *list) |
---|
630 | { |
---|
631 | unsigned char *buffer, in[3], out[4]; |
---|
632 | int i, n, index, len; |
---|
633 | |
---|
634 | n = list->n * list->size; |
---|
635 | buffer = (unsigned char*)gl2psMalloc(n * sizeof(unsigned char)); |
---|
636 | memcpy(buffer, list->array, n * sizeof(unsigned char)); |
---|
637 | gl2psListReset(list); |
---|
638 | |
---|
639 | index = 0; |
---|
640 | while(index < n) { |
---|
641 | len = 0; |
---|
642 | for(i = 0; i < 3; i++) { |
---|
643 | if(index < n){ |
---|
644 | in[i] = buffer[index]; |
---|
645 | len++; |
---|
646 | } |
---|
647 | else{ |
---|
648 | in[i] = 0; |
---|
649 | } |
---|
650 | index++; |
---|
651 | } |
---|
652 | if(len) { |
---|
653 | gl2psEncodeBase64Block(in, out, len); |
---|
654 | for(i = 0; i < 4; i++) |
---|
655 | gl2psListAdd(list, &out[i]); |
---|
656 | } |
---|
657 | } |
---|
658 | gl2psFree(buffer); |
---|
659 | } |
---|
660 | |
---|
661 | #endif |
---|
662 | |
---|
663 | /* Helpers for rgba colors */ |
---|
664 | |
---|
665 | static GLboolean gl2psSameColor(GL2PSrgba rgba1, GL2PSrgba rgba2) |
---|
666 | { |
---|
667 | if(!GL2PS_ZERO(rgba1[0] - rgba2[0]) || |
---|
668 | !GL2PS_ZERO(rgba1[1] - rgba2[1]) || |
---|
669 | !GL2PS_ZERO(rgba1[2] - rgba2[2])) |
---|
670 | return GL_FALSE; |
---|
671 | return GL_TRUE; |
---|
672 | } |
---|
673 | |
---|
674 | static GLboolean gl2psVertsSameColor(const GL2PSprimitive *prim) |
---|
675 | { |
---|
676 | int i; |
---|
677 | |
---|
678 | for(i = 1; i < prim->numverts; i++){ |
---|
679 | if(!gl2psSameColor(prim->verts[0].rgba, prim->verts[i].rgba)){ |
---|
680 | return GL_FALSE; |
---|
681 | } |
---|
682 | } |
---|
683 | return GL_TRUE; |
---|
684 | } |
---|
685 | |
---|
686 | static GLboolean gl2psSameColorThreshold(int n, GL2PSrgba rgba[], |
---|
687 | GL2PSrgba threshold) |
---|
688 | { |
---|
689 | int i; |
---|
690 | |
---|
691 | if(n < 2) return GL_TRUE; |
---|
692 | |
---|
693 | for(i = 1; i < n; i++){ |
---|
694 | if(fabs(rgba[0][0] - rgba[i][0]) > threshold[0] || |
---|
695 | fabs(rgba[0][1] - rgba[i][1]) > threshold[1] || |
---|
696 | fabs(rgba[0][2] - rgba[i][2]) > threshold[2]) |
---|
697 | return GL_FALSE; |
---|
698 | } |
---|
699 | |
---|
700 | return GL_TRUE; |
---|
701 | } |
---|
702 | |
---|
703 | static void gl2psSetLastColor(GL2PSrgba rgba) |
---|
704 | { |
---|
705 | int i; |
---|
706 | for(i = 0; i < 3; ++i){ |
---|
707 | gl2ps->lastrgba[i] = rgba[i]; |
---|
708 | } |
---|
709 | } |
---|
710 | |
---|
711 | static GLfloat gl2psGetRGB(GL2PSimage *im, GLuint x, GLuint y, |
---|
712 | GLfloat *red, GLfloat *green, GLfloat *blue) |
---|
713 | { |
---|
714 | |
---|
715 | GLsizei width = im->width; |
---|
716 | GLsizei height = im->height; |
---|
717 | GLfloat *pixels = im->pixels; |
---|
718 | GLfloat *pimag; |
---|
719 | |
---|
720 | /* OpenGL image is from down to up, PS image is up to down */ |
---|
721 | switch(im->format){ |
---|
722 | case GL_RGBA: |
---|
723 | pimag = pixels + 4 * (width * (height - 1 - y) + x); |
---|
724 | break; |
---|
725 | case GL_RGB: |
---|
726 | default: |
---|
727 | pimag = pixels + 3 * (width * (height - 1 - y) + x); |
---|
728 | break; |
---|
729 | } |
---|
730 | *red = *pimag; pimag++; |
---|
731 | *green = *pimag; pimag++; |
---|
732 | *blue = *pimag; pimag++; |
---|
733 | |
---|
734 | return (im->format == GL_RGBA) ? *pimag : 1.0F; |
---|
735 | } |
---|
736 | |
---|
737 | /* Helper routines for pixmaps */ |
---|
738 | |
---|
739 | static GL2PSimage *gl2psCopyPixmap(GL2PSimage *im) |
---|
740 | { |
---|
741 | int size; |
---|
742 | GL2PSimage *image = (GL2PSimage*)gl2psMalloc(sizeof(GL2PSimage)); |
---|
743 | |
---|
744 | image->width = im->width; |
---|
745 | image->height = im->height; |
---|
746 | image->format = im->format; |
---|
747 | image->type = im->type; |
---|
748 | |
---|
749 | switch(image->format){ |
---|
750 | case GL_RGBA: |
---|
751 | size = image->height * image->width * 4 * sizeof(GLfloat); |
---|
752 | break; |
---|
753 | case GL_RGB: |
---|
754 | default: |
---|
755 | size = image->height * image->width * 3 * sizeof(GLfloat); |
---|
756 | break; |
---|
757 | } |
---|
758 | |
---|
759 | image->pixels = (GLfloat*)gl2psMalloc(size); |
---|
760 | memcpy(image->pixels, im->pixels, size); |
---|
761 | |
---|
762 | return image; |
---|
763 | } |
---|
764 | |
---|
765 | static void gl2psFreePixmap(GL2PSimage *im) |
---|
766 | { |
---|
767 | if(!im) |
---|
768 | return; |
---|
769 | gl2psFree(im->pixels); |
---|
770 | gl2psFree(im); |
---|
771 | } |
---|
772 | |
---|
773 | #if defined(GL2PS_HAVE_LIBPNG) |
---|
774 | |
---|
775 | #if !defined(png_jmpbuf) |
---|
776 | # define png_jmpbuf(png_ptr) ((png_ptr)->jmpbuf) |
---|
777 | #endif |
---|
778 | |
---|
779 | static void gl2psUserWritePNG(png_structp png_ptr, png_bytep data, png_size_t length) |
---|
780 | { |
---|
781 | unsigned int i; |
---|
782 | GL2PSlist *png = (GL2PSlist*)png_get_io_ptr(png_ptr); |
---|
783 | for(i = 0; i < length; i++) |
---|
784 | gl2psListAdd(png, &data[i]); |
---|
785 | } |
---|
786 | |
---|
787 | static void gl2psUserFlushPNG(png_structp png_ptr) |
---|
788 | { |
---|
789 | } |
---|
790 | |
---|
791 | static void gl2psConvertPixmapToPNG(GL2PSimage *pixmap, GL2PSlist *png) |
---|
792 | { |
---|
793 | png_structp png_ptr; |
---|
794 | png_infop info_ptr; |
---|
795 | unsigned char *row_data; |
---|
796 | GLfloat dr, dg, db; |
---|
797 | int row, col; |
---|
798 | |
---|
799 | if(!(png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL))) |
---|
800 | return; |
---|
801 | |
---|
802 | if(!(info_ptr = png_create_info_struct(png_ptr))){ |
---|
803 | png_destroy_write_struct(&png_ptr, NULL); |
---|
804 | return; |
---|
805 | } |
---|
806 | |
---|
807 | if(setjmp(png_jmpbuf(png_ptr))) { |
---|
808 | png_destroy_write_struct(&png_ptr, &info_ptr); |
---|
809 | return; |
---|
810 | } |
---|
811 | |
---|
812 | png_set_write_fn(png_ptr, (void *)png, gl2psUserWritePNG, gl2psUserFlushPNG); |
---|
813 | png_set_compression_level(png_ptr, Z_DEFAULT_COMPRESSION); |
---|
814 | png_set_IHDR(png_ptr, info_ptr, pixmap->width, pixmap->height, 8, |
---|
815 | PNG_COLOR_TYPE_RGB, PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_BASE, |
---|
816 | PNG_FILTER_TYPE_BASE); |
---|
817 | png_write_info(png_ptr, info_ptr); |
---|
818 | |
---|
819 | row_data = (unsigned char*)gl2psMalloc(3 * pixmap->width * sizeof(unsigned char)); |
---|
820 | for(row = 0; row < pixmap->height; row++){ |
---|
821 | for(col = 0; col < pixmap->width; col++){ |
---|
822 | gl2psGetRGB(pixmap, col, row, &dr, &dg, &db); |
---|
823 | row_data[3*col] = (unsigned char)(255. * dr); |
---|
824 | row_data[3*col+1] = (unsigned char)(255. * dg); |
---|
825 | row_data[3*col+2] = (unsigned char)(255. * db); |
---|
826 | } |
---|
827 | png_write_row(png_ptr, (png_bytep)row_data); |
---|
828 | } |
---|
829 | gl2psFree(row_data); |
---|
830 | |
---|
831 | png_write_end(png_ptr, info_ptr); |
---|
832 | png_destroy_write_struct(&png_ptr, &info_ptr); |
---|
833 | } |
---|
834 | |
---|
835 | #endif |
---|
836 | |
---|
837 | /* Helper routines for text strings */ |
---|
838 | |
---|
839 | static GLint gl2psAddText(GLint type, const char *str, const char *fontname, |
---|
840 | GLshort fontsize, GLint alignment, GLfloat angle) |
---|
841 | { |
---|
842 | GLfloat pos[4]; |
---|
843 | GL2PSprimitive *prim; |
---|
844 | GLboolean valid; |
---|
845 | |
---|
846 | if(!gl2ps || !str || !fontname) return GL2PS_UNINITIALIZED; |
---|
847 | |
---|
848 | if(gl2ps->options & GL2PS_NO_TEXT) return GL2PS_SUCCESS; |
---|
849 | |
---|
850 | glGetBooleanv(GL_CURRENT_RASTER_POSITION_VALID, &valid); |
---|
851 | if(GL_FALSE == valid) return GL2PS_SUCCESS; /* the primitive is culled */ |
---|
852 | |
---|
853 | glGetFloatv(GL_CURRENT_RASTER_POSITION, pos); |
---|
854 | |
---|
855 | prim = (GL2PSprimitive*)gl2psMalloc(sizeof(GL2PSprimitive)); |
---|
856 | prim->type = type; |
---|
857 | prim->boundary = 0; |
---|
858 | prim->numverts = 1; |
---|
859 | prim->verts = (GL2PSvertex*)gl2psMalloc(sizeof(GL2PSvertex)); |
---|
860 | prim->verts[0].xyz[0] = pos[0]; |
---|
861 | prim->verts[0].xyz[1] = pos[1]; |
---|
862 | prim->verts[0].xyz[2] = pos[2]; |
---|
863 | prim->culled = 0; |
---|
864 | prim->offset = 0; |
---|
865 | prim->pattern = 0; |
---|
866 | prim->factor = 0; |
---|
867 | prim->width = 1; |
---|
868 | glGetFloatv(GL_CURRENT_RASTER_COLOR, prim->verts[0].rgba); |
---|
869 | prim->data.text = (GL2PSstring*)gl2psMalloc(sizeof(GL2PSstring)); |
---|
870 | prim->data.text->str = (char*)gl2psMalloc((strlen(str)+1)*sizeof(char)); |
---|
871 | strcpy(prim->data.text->str, str); |
---|
872 | prim->data.text->fontname = (char*)gl2psMalloc((strlen(fontname)+1)*sizeof(char)); |
---|
873 | strcpy(prim->data.text->fontname, fontname); |
---|
874 | prim->data.text->fontsize = fontsize; |
---|
875 | prim->data.text->alignment = alignment; |
---|
876 | prim->data.text->angle = angle; |
---|
877 | |
---|
878 | gl2psListAdd(gl2ps->auxprimitives, &prim); |
---|
879 | glPassThrough(GL2PS_TEXT_TOKEN); |
---|
880 | |
---|
881 | return GL2PS_SUCCESS; |
---|
882 | } |
---|
883 | |
---|
884 | static GL2PSstring *gl2psCopyText(GL2PSstring *t) |
---|
885 | { |
---|
886 | GL2PSstring *text = (GL2PSstring*)gl2psMalloc(sizeof(GL2PSstring)); |
---|
887 | text->str = (char*)gl2psMalloc((strlen(t->str)+1)*sizeof(char)); |
---|
888 | strcpy(text->str, t->str); |
---|
889 | text->fontname = (char*)gl2psMalloc((strlen(t->fontname)+1)*sizeof(char)); |
---|
890 | strcpy(text->fontname, t->fontname); |
---|
891 | text->fontsize = t->fontsize; |
---|
892 | text->alignment = t->alignment; |
---|
893 | text->angle = t->angle; |
---|
894 | |
---|
895 | return text; |
---|
896 | } |
---|
897 | |
---|
898 | static void gl2psFreeText(GL2PSstring *text) |
---|
899 | { |
---|
900 | if(!text) |
---|
901 | return; |
---|
902 | gl2psFree(text->str); |
---|
903 | gl2psFree(text->fontname); |
---|
904 | gl2psFree(text); |
---|
905 | } |
---|
906 | |
---|
907 | /* Helpers for blending modes */ |
---|
908 | |
---|
909 | static GLboolean gl2psSupportedBlendMode(GLenum sfactor, GLenum dfactor) |
---|
910 | { |
---|
911 | /* returns TRUE if gl2ps supports the argument combination: only two |
---|
912 | blending modes have been implemented so far */ |
---|
913 | |
---|
914 | if( (sfactor == GL_SRC_ALPHA && dfactor == GL_ONE_MINUS_SRC_ALPHA) || |
---|
915 | (sfactor == GL_ONE && dfactor == GL_ZERO) ) |
---|
916 | return GL_TRUE; |
---|
917 | return GL_FALSE; |
---|
918 | } |
---|
919 | |
---|
920 | static void gl2psAdaptVertexForBlending(GL2PSvertex *v) |
---|
921 | { |
---|
922 | /* Transforms vertex depending on the actual blending function - |
---|
923 | currently the vertex v is considered as source vertex and his |
---|
924 | alpha value is changed to 1.0 if source blending GL_ONE is |
---|
925 | active. This might be extended in the future */ |
---|
926 | |
---|
927 | if(!v || !gl2ps) |
---|
928 | return; |
---|
929 | |
---|
930 | if(gl2ps->options & GL2PS_NO_BLENDING || !gl2ps->blending){ |
---|
931 | v->rgba[3] = 1.0F; |
---|
932 | return; |
---|
933 | } |
---|
934 | |
---|
935 | switch(gl2ps->blendfunc[0]){ |
---|
936 | case GL_ONE: |
---|
937 | v->rgba[3] = 1.0F; |
---|
938 | break; |
---|
939 | default: |
---|
940 | break; |
---|
941 | } |
---|
942 | } |
---|
943 | |
---|
944 | static void gl2psAssignTriangleProperties(GL2PStriangle *t) |
---|
945 | { |
---|
946 | /* int i; */ |
---|
947 | |
---|
948 | t->prop = T_VAR_COLOR; |
---|
949 | |
---|
950 | /* Uncommenting the following lines activates an even more fine |
---|
951 | grained distinction between triangle types - please don't delete, |
---|
952 | a remarkable amount of PDF handling code inside this file depends |
---|
953 | on it if activated */ |
---|
954 | /* |
---|
955 | t->prop = T_CONST_COLOR; |
---|
956 | for(i = 0; i < 3; ++i){ |
---|
957 | if(!GL2PS_ZERO(t->vertex[0].rgba[i] - t->vertex[1].rgba[i]) || |
---|
958 | !GL2PS_ZERO(t->vertex[1].rgba[i] - t->vertex[2].rgba[i])){ |
---|
959 | t->prop = T_VAR_COLOR; |
---|
960 | break; |
---|
961 | } |
---|
962 | } |
---|
963 | */ |
---|
964 | |
---|
965 | if(!GL2PS_ZERO(t->vertex[0].rgba[3] - t->vertex[1].rgba[3]) || |
---|
966 | !GL2PS_ZERO(t->vertex[1].rgba[3] - t->vertex[2].rgba[3])){ |
---|
967 | t->prop |= T_VAR_ALPHA; |
---|
968 | } |
---|
969 | else{ |
---|
970 | if(t->vertex[0].rgba[3] < 1) |
---|
971 | t->prop |= T_ALPHA_LESS_1; |
---|
972 | else |
---|
973 | t->prop |= T_ALPHA_1; |
---|
974 | } |
---|
975 | } |
---|
976 | |
---|
977 | static void gl2psFillTriangleFromPrimitive(GL2PStriangle *t, GL2PSprimitive *p, |
---|
978 | GLboolean assignprops) |
---|
979 | { |
---|
980 | t->vertex[0] = p->verts[0]; |
---|
981 | t->vertex[1] = p->verts[1]; |
---|
982 | t->vertex[2] = p->verts[2]; |
---|
983 | if(GL_TRUE == assignprops) |
---|
984 | gl2psAssignTriangleProperties(t); |
---|
985 | } |
---|
986 | |
---|
987 | static void gl2psInitTriangle(GL2PStriangle *t) |
---|
988 | { |
---|
989 | int i; |
---|
990 | GL2PSvertex vertex = { {-1.0F, -1.0F, -1.0F}, {-1.0F, -1.0F, -1.0F, -1.0F} }; |
---|
991 | for(i = 0; i < 3; i++) |
---|
992 | t->vertex[i] = vertex; |
---|
993 | t->prop = T_UNDEFINED; |
---|
994 | } |
---|
995 | |
---|
996 | /* Miscellaneous helper routines */ |
---|
997 | |
---|
998 | static GL2PSprimitive *gl2psCopyPrimitive(GL2PSprimitive *p) |
---|
999 | { |
---|
1000 | GL2PSprimitive *prim; |
---|
1001 | |
---|
1002 | if(!p){ |
---|
1003 | gl2psMsg(GL2PS_ERROR, "Trying to copy an empty primitive"); |
---|
1004 | return NULL; |
---|
1005 | } |
---|
1006 | |
---|
1007 | prim = (GL2PSprimitive*)gl2psMalloc(sizeof(GL2PSprimitive)); |
---|
1008 | |
---|
1009 | prim->type = p->type; |
---|
1010 | prim->numverts = p->numverts; |
---|
1011 | prim->boundary = p->boundary; |
---|
1012 | prim->offset = p->offset; |
---|
1013 | prim->pattern = p->pattern; |
---|
1014 | prim->factor = p->factor; |
---|
1015 | prim->culled = p->culled; |
---|
1016 | prim->width = p->width; |
---|
1017 | prim->verts = (GL2PSvertex*)gl2psMalloc(p->numverts*sizeof(GL2PSvertex)); |
---|
1018 | memcpy(prim->verts, p->verts, p->numverts * sizeof(GL2PSvertex)); |
---|
1019 | |
---|
1020 | switch(prim->type){ |
---|
1021 | case GL2PS_PIXMAP : |
---|
1022 | prim->data.image = gl2psCopyPixmap(p->data.image); |
---|
1023 | break; |
---|
1024 | case GL2PS_TEXT : |
---|
1025 | case GL2PS_SPECIAL : |
---|
1026 | prim->data.text = gl2psCopyText(p->data.text); |
---|
1027 | break; |
---|
1028 | default: |
---|
1029 | break; |
---|
1030 | } |
---|
1031 | |
---|
1032 | return prim; |
---|
1033 | } |
---|
1034 | |
---|
1035 | static GLboolean gl2psSamePosition(GL2PSxyz p1, GL2PSxyz p2) |
---|
1036 | { |
---|
1037 | if(!GL2PS_ZERO(p1[0] - p2[0]) || |
---|
1038 | !GL2PS_ZERO(p1[1] - p2[1]) || |
---|
1039 | !GL2PS_ZERO(p1[2] - p2[2])) |
---|
1040 | return GL_FALSE; |
---|
1041 | return GL_TRUE; |
---|
1042 | } |
---|
1043 | |
---|
1044 | /********************************************************************* |
---|
1045 | * |
---|
1046 | * 3D sorting routines |
---|
1047 | * |
---|
1048 | *********************************************************************/ |
---|
1049 | |
---|
1050 | static GLfloat gl2psComparePointPlane(GL2PSxyz point, GL2PSplane plane) |
---|
1051 | { |
---|
1052 | return (plane[0] * point[0] + |
---|
1053 | plane[1] * point[1] + |
---|
1054 | plane[2] * point[2] + |
---|
1055 | plane[3]); |
---|
1056 | } |
---|
1057 | |
---|
1058 | static GLfloat gl2psPsca(GLfloat *a, GLfloat *b) |
---|
1059 | { |
---|
1060 | return (a[0]*b[0] + a[1]*b[1] + a[2]*b[2]); |
---|
1061 | } |
---|
1062 | |
---|
1063 | static void gl2psPvec(GLfloat *a, GLfloat *b, GLfloat *c) |
---|
1064 | { |
---|
1065 | c[0] = a[1]*b[2] - a[2]*b[1]; |
---|
1066 | c[1] = a[2]*b[0] - a[0]*b[2]; |
---|
1067 | c[2] = a[0]*b[1] - a[1]*b[0]; |
---|
1068 | } |
---|
1069 | |
---|
1070 | static GLfloat gl2psNorm(GLfloat *a) |
---|
1071 | { |
---|
1072 | return (GLfloat)sqrt(a[0]*a[0] + a[1]*a[1] + a[2]*a[2]); |
---|
1073 | } |
---|
1074 | |
---|
1075 | static void gl2psGetNormal(GLfloat *a, GLfloat *b, GLfloat *c) |
---|
1076 | { |
---|
1077 | GLfloat norm; |
---|
1078 | |
---|
1079 | gl2psPvec(a, b, c); |
---|
1080 | if(!GL2PS_ZERO(norm = gl2psNorm(c))){ |
---|
1081 | c[0] = c[0] / norm; |
---|
1082 | c[1] = c[1] / norm; |
---|
1083 | c[2] = c[2] / norm; |
---|
1084 | } |
---|
1085 | else{ |
---|
1086 | /* The plane is still wrong despite our tests in gl2psGetPlane. |
---|
1087 | Let's return a dummy value for now (this is a hack: we should |
---|
1088 | do more intelligent tests in GetPlane) */ |
---|
1089 | c[0] = c[1] = 0.0F; |
---|
1090 | c[2] = 1.0F; |
---|
1091 | } |
---|
1092 | } |
---|
1093 | |
---|
1094 | static void gl2psGetPlane(GL2PSprimitive *prim, GL2PSplane plane) |
---|
1095 | { |
---|
1096 | GL2PSxyz v = {0.0F, 0.0F, 0.0F}, w = {0.0F, 0.0F, 0.0F}; |
---|
1097 | |
---|
1098 | switch(prim->type){ |
---|
1099 | case GL2PS_TRIANGLE : |
---|
1100 | case GL2PS_QUADRANGLE : |
---|
1101 | v[0] = prim->verts[1].xyz[0] - prim->verts[0].xyz[0]; |
---|
1102 | v[1] = prim->verts[1].xyz[1] - prim->verts[0].xyz[1]; |
---|
1103 | v[2] = prim->verts[1].xyz[2] - prim->verts[0].xyz[2]; |
---|
1104 | w[0] = prim->verts[2].xyz[0] - prim->verts[0].xyz[0]; |
---|
1105 | w[1] = prim->verts[2].xyz[1] - prim->verts[0].xyz[1]; |
---|
1106 | w[2] = prim->verts[2].xyz[2] - prim->verts[0].xyz[2]; |
---|
1107 | if((GL2PS_ZERO(v[0]) && GL2PS_ZERO(v[1]) && GL2PS_ZERO(v[2])) || |
---|
1108 | (GL2PS_ZERO(w[0]) && GL2PS_ZERO(w[1]) && GL2PS_ZERO(w[2]))){ |
---|
1109 | plane[0] = plane[1] = 0.0F; |
---|
1110 | plane[2] = 1.0F; |
---|
1111 | plane[3] = -prim->verts[0].xyz[2]; |
---|
1112 | } |
---|
1113 | else{ |
---|
1114 | gl2psGetNormal(v, w, plane); |
---|
1115 | plane[3] = |
---|
1116 | - plane[0] * prim->verts[0].xyz[0] |
---|
1117 | - plane[1] * prim->verts[0].xyz[1] |
---|
1118 | - plane[2] * prim->verts[0].xyz[2]; |
---|
1119 | } |
---|
1120 | break; |
---|
1121 | case GL2PS_LINE : |
---|
1122 | v[0] = prim->verts[1].xyz[0] - prim->verts[0].xyz[0]; |
---|
1123 | v[1] = prim->verts[1].xyz[1] - prim->verts[0].xyz[1]; |
---|
1124 | v[2] = prim->verts[1].xyz[2] - prim->verts[0].xyz[2]; |
---|
1125 | if(GL2PS_ZERO(v[0]) && GL2PS_ZERO(v[1]) && GL2PS_ZERO(v[2])){ |
---|
1126 | plane[0] = plane[1] = 0.0F; |
---|
1127 | plane[2] = 1.0F; |
---|
1128 | plane[3] = -prim->verts[0].xyz[2]; |
---|
1129 | } |
---|
1130 | else{ |
---|
1131 | if(GL2PS_ZERO(v[0])) w[0] = 1.0F; |
---|
1132 | else if(GL2PS_ZERO(v[1])) w[1] = 1.0F; |
---|
1133 | else w[2] = 1.0F; |
---|
1134 | gl2psGetNormal(v, w, plane); |
---|
1135 | plane[3] = |
---|
1136 | - plane[0] * prim->verts[0].xyz[0] |
---|
1137 | - plane[1] * prim->verts[0].xyz[1] |
---|
1138 | - plane[2] * prim->verts[0].xyz[2]; |
---|
1139 | } |
---|
1140 | break; |
---|
1141 | case GL2PS_POINT : |
---|
1142 | case GL2PS_PIXMAP : |
---|
1143 | case GL2PS_TEXT : |
---|
1144 | case GL2PS_SPECIAL : |
---|
1145 | case GL2PS_IMAGEMAP: |
---|
1146 | plane[0] = plane[1] = 0.0F; |
---|
1147 | plane[2] = 1.0F; |
---|
1148 | plane[3] = -prim->verts[0].xyz[2]; |
---|
1149 | break; |
---|
1150 | default : |
---|
1151 | gl2psMsg(GL2PS_ERROR, "Unknown primitive type in BSP tree"); |
---|
1152 | plane[0] = plane[1] = plane[3] = 0.0F; |
---|
1153 | plane[2] = 1.0F; |
---|
1154 | break; |
---|
1155 | } |
---|
1156 | } |
---|
1157 | |
---|
1158 | static void gl2psCutEdge(GL2PSvertex *a, GL2PSvertex *b, GL2PSplane plane, |
---|
1159 | GL2PSvertex *c) |
---|
1160 | { |
---|
1161 | GL2PSxyz v; |
---|
1162 | GLfloat sect, psca; |
---|
1163 | |
---|
1164 | v[0] = b->xyz[0] - a->xyz[0]; |
---|
1165 | v[1] = b->xyz[1] - a->xyz[1]; |
---|
1166 | v[2] = b->xyz[2] - a->xyz[2]; |
---|
1167 | |
---|
1168 | if(!GL2PS_ZERO(psca = gl2psPsca(plane, v))) |
---|
1169 | sect = -gl2psComparePointPlane(a->xyz, plane) / psca; |
---|
1170 | else |
---|
1171 | sect = 0.0F; |
---|
1172 | |
---|
1173 | c->xyz[0] = a->xyz[0] + v[0] * sect; |
---|
1174 | c->xyz[1] = a->xyz[1] + v[1] * sect; |
---|
1175 | c->xyz[2] = a->xyz[2] + v[2] * sect; |
---|
1176 | |
---|
1177 | c->rgba[0] = (1 - sect) * a->rgba[0] + sect * b->rgba[0]; |
---|
1178 | c->rgba[1] = (1 - sect) * a->rgba[1] + sect * b->rgba[1]; |
---|
1179 | c->rgba[2] = (1 - sect) * a->rgba[2] + sect * b->rgba[2]; |
---|
1180 | c->rgba[3] = (1 - sect) * a->rgba[3] + sect * b->rgba[3]; |
---|
1181 | } |
---|
1182 | |
---|
1183 | static void gl2psCreateSplitPrimitive(GL2PSprimitive *parent, GL2PSplane plane, |
---|
1184 | GL2PSprimitive *child, GLshort numverts, |
---|
1185 | GLshort *index0, GLshort *index1) |
---|
1186 | { |
---|
1187 | GLshort i; |
---|
1188 | |
---|
1189 | if(parent->type == GL2PS_IMAGEMAP){ |
---|
1190 | child->type = GL2PS_IMAGEMAP; |
---|
1191 | child->data.image = parent->data.image; |
---|
1192 | } |
---|
1193 | else{ |
---|
1194 | if(numverts > 4){ |
---|
1195 | gl2psMsg(GL2PS_WARNING, "%d vertices in polygon", numverts); |
---|
1196 | numverts = 4; |
---|
1197 | } |
---|
1198 | switch(numverts){ |
---|
1199 | case 1 : child->type = GL2PS_POINT; break; |
---|
1200 | case 2 : child->type = GL2PS_LINE; break; |
---|
1201 | case 3 : child->type = GL2PS_TRIANGLE; break; |
---|
1202 | case 4 : child->type = GL2PS_QUADRANGLE; break; |
---|
1203 | default: child->type = GL2PS_NO_TYPE; break; |
---|
1204 | } |
---|
1205 | } |
---|
1206 | |
---|
1207 | child->boundary = 0; /* FIXME: not done! */ |
---|
1208 | child->culled = parent->culled; |
---|
1209 | child->offset = parent->offset; |
---|
1210 | child->pattern = parent->pattern; |
---|
1211 | child->factor = parent->factor; |
---|
1212 | child->width = parent->width; |
---|
1213 | child->numverts = numverts; |
---|
1214 | child->verts = (GL2PSvertex*)gl2psMalloc(numverts * sizeof(GL2PSvertex)); |
---|
1215 | |
---|
1216 | for(i = 0; i < numverts; i++){ |
---|
1217 | if(index1[i] < 0){ |
---|
1218 | child->verts[i] = parent->verts[index0[i]]; |
---|
1219 | } |
---|
1220 | else{ |
---|
1221 | gl2psCutEdge(&parent->verts[index0[i]], &parent->verts[index1[i]], |
---|
1222 | plane, &child->verts[i]); |
---|
1223 | } |
---|
1224 | } |
---|
1225 | } |
---|
1226 | |
---|
1227 | static void gl2psAddIndex(GLshort *index0, GLshort *index1, GLshort *nb, |
---|
1228 | GLshort i, GLshort j) |
---|
1229 | { |
---|
1230 | GLint k; |
---|
1231 | |
---|
1232 | for(k = 0; k < *nb; k++){ |
---|
1233 | if((index0[k] == i && index1[k] == j) || |
---|
1234 | (index1[k] == i && index0[k] == j)) return; |
---|
1235 | } |
---|
1236 | index0[*nb] = i; |
---|
1237 | index1[*nb] = j; |
---|
1238 | (*nb)++; |
---|
1239 | } |
---|
1240 | |
---|
1241 | static GLshort gl2psGetIndex(GLshort i, GLshort num) |
---|
1242 | { |
---|
1243 | return (i < num - 1) ? i + 1 : 0; |
---|
1244 | } |
---|
1245 | |
---|
1246 | static GLint gl2psTestSplitPrimitive(GL2PSprimitive *prim, GL2PSplane plane) |
---|
1247 | { |
---|
1248 | GLint type = GL2PS_COINCIDENT; |
---|
1249 | GLshort i, j; |
---|
1250 | GLfloat d[5]; |
---|
1251 | |
---|
1252 | for(i = 0; i < prim->numverts; i++){ |
---|
1253 | d[i] = gl2psComparePointPlane(prim->verts[i].xyz, plane); |
---|
1254 | } |
---|
1255 | |
---|
1256 | if(prim->numverts < 2){ |
---|
1257 | return 0; |
---|
1258 | } |
---|
1259 | else{ |
---|
1260 | for(i = 0; i < prim->numverts; i++){ |
---|
1261 | j = gl2psGetIndex(i, prim->numverts); |
---|
1262 | if(d[j] > GL2PS_EPSILON){ |
---|
1263 | if(type == GL2PS_COINCIDENT) type = GL2PS_IN_BACK_OF; |
---|
1264 | else if(type != GL2PS_IN_BACK_OF) return 1; |
---|
1265 | if(d[i] < -GL2PS_EPSILON) return 1; |
---|
1266 | } |
---|
1267 | else if(d[j] < -GL2PS_EPSILON){ |
---|
1268 | if(type == GL2PS_COINCIDENT) type = GL2PS_IN_FRONT_OF; |
---|
1269 | else if(type != GL2PS_IN_FRONT_OF) return 1; |
---|
1270 | if(d[i] > GL2PS_EPSILON) return 1; |
---|
1271 | } |
---|
1272 | } |
---|
1273 | } |
---|
1274 | return 0; |
---|
1275 | } |
---|
1276 | |
---|
1277 | static GLint gl2psSplitPrimitive(GL2PSprimitive *prim, GL2PSplane plane, |
---|
1278 | GL2PSprimitive **front, GL2PSprimitive **back) |
---|
1279 | { |
---|
1280 | GLshort i, j, in = 0, out = 0, in0[5], in1[5], out0[5], out1[5]; |
---|
1281 | GLint type; |
---|
1282 | GLfloat d[5]; |
---|
1283 | |
---|
1284 | type = GL2PS_COINCIDENT; |
---|
1285 | |
---|
1286 | for(i = 0; i < prim->numverts; i++){ |
---|
1287 | d[i] = gl2psComparePointPlane(prim->verts[i].xyz, plane); |
---|
1288 | } |
---|
1289 | |
---|
1290 | switch(prim->type){ |
---|
1291 | case GL2PS_POINT : |
---|
1292 | if(d[0] > GL2PS_EPSILON) type = GL2PS_IN_BACK_OF; |
---|
1293 | else if(d[0] < -GL2PS_EPSILON) type = GL2PS_IN_FRONT_OF; |
---|
1294 | else type = GL2PS_COINCIDENT; |
---|
1295 | break; |
---|
1296 | default : |
---|
1297 | for(i = 0; i < prim->numverts; i++){ |
---|
1298 | j = gl2psGetIndex(i, prim->numverts); |
---|
1299 | if(d[j] > GL2PS_EPSILON){ |
---|
1300 | if(type == GL2PS_COINCIDENT) type = GL2PS_IN_BACK_OF; |
---|
1301 | else if(type != GL2PS_IN_BACK_OF) type = GL2PS_SPANNING; |
---|
1302 | if(d[i] < -GL2PS_EPSILON){ |
---|
1303 | gl2psAddIndex(in0, in1, &in, i, j); |
---|
1304 | gl2psAddIndex(out0, out1, &out, i, j); |
---|
1305 | type = GL2PS_SPANNING; |
---|
1306 | } |
---|
1307 | gl2psAddIndex(out0, out1, &out, j, -1); |
---|
1308 | } |
---|
1309 | else if(d[j] < -GL2PS_EPSILON){ |
---|
1310 | if(type == GL2PS_COINCIDENT) type = GL2PS_IN_FRONT_OF; |
---|
1311 | else if(type != GL2PS_IN_FRONT_OF) type = GL2PS_SPANNING; |
---|
1312 | if(d[i] > GL2PS_EPSILON){ |
---|
1313 | gl2psAddIndex(in0, in1, &in, i, j); |
---|
1314 | gl2psAddIndex(out0, out1, &out, i, j); |
---|
1315 | type = GL2PS_SPANNING; |
---|
1316 | } |
---|
1317 | gl2psAddIndex(in0, in1, &in, j, -1); |
---|
1318 | } |
---|
1319 | else{ |
---|
1320 | gl2psAddIndex(in0, in1, &in, j, -1); |
---|
1321 | gl2psAddIndex(out0, out1, &out, j, -1); |
---|
1322 | } |
---|
1323 | } |
---|
1324 | break; |
---|
1325 | } |
---|
1326 | |
---|
1327 | if(type == GL2PS_SPANNING){ |
---|
1328 | *back = (GL2PSprimitive*)gl2psMalloc(sizeof(GL2PSprimitive)); |
---|
1329 | *front = (GL2PSprimitive*)gl2psMalloc(sizeof(GL2PSprimitive)); |
---|
1330 | gl2psCreateSplitPrimitive(prim, plane, *back, out, out0, out1); |
---|
1331 | gl2psCreateSplitPrimitive(prim, plane, *front, in, in0, in1); |
---|
1332 | } |
---|
1333 | |
---|
1334 | return type; |
---|
1335 | } |
---|
1336 | |
---|
1337 | static void gl2psDivideQuad(GL2PSprimitive *quad, |
---|
1338 | GL2PSprimitive **t1, GL2PSprimitive **t2) |
---|
1339 | { |
---|
1340 | *t1 = (GL2PSprimitive*)gl2psMalloc(sizeof(GL2PSprimitive)); |
---|
1341 | *t2 = (GL2PSprimitive*)gl2psMalloc(sizeof(GL2PSprimitive)); |
---|
1342 | (*t1)->type = (*t2)->type = GL2PS_TRIANGLE; |
---|
1343 | (*t1)->numverts = (*t2)->numverts = 3; |
---|
1344 | (*t1)->culled = (*t2)->culled = quad->culled; |
---|
1345 | (*t1)->offset = (*t2)->offset = quad->offset; |
---|
1346 | (*t1)->pattern = (*t2)->pattern = quad->pattern; |
---|
1347 | (*t1)->factor = (*t2)->factor = quad->factor; |
---|
1348 | (*t1)->width = (*t2)->width = quad->width; |
---|
1349 | (*t1)->verts = (GL2PSvertex*)gl2psMalloc(3 * sizeof(GL2PSvertex)); |
---|
1350 | (*t2)->verts = (GL2PSvertex*)gl2psMalloc(3 * sizeof(GL2PSvertex)); |
---|
1351 | (*t1)->verts[0] = quad->verts[0]; |
---|
1352 | (*t1)->verts[1] = quad->verts[1]; |
---|
1353 | (*t1)->verts[2] = quad->verts[2]; |
---|
1354 | (*t1)->boundary = ((quad->boundary & 1) ? 1 : 0) | ((quad->boundary & 2) ? 2 : 0); |
---|
1355 | (*t2)->verts[0] = quad->verts[0]; |
---|
1356 | (*t2)->verts[1] = quad->verts[2]; |
---|
1357 | (*t2)->verts[2] = quad->verts[3]; |
---|
1358 | (*t2)->boundary = ((quad->boundary & 4) ? 2 : 0) | ((quad->boundary & 4) ? 2 : 0); |
---|
1359 | } |
---|
1360 | |
---|
1361 | static int gl2psCompareDepth(const void *a, const void *b) |
---|
1362 | { |
---|
1363 | GL2PSprimitive *q, *w; |
---|
1364 | GLfloat dq = 0.0F, dw = 0.0F, diff; |
---|
1365 | int i; |
---|
1366 | |
---|
1367 | q = *(GL2PSprimitive**)a; |
---|
1368 | w = *(GL2PSprimitive**)b; |
---|
1369 | |
---|
1370 | for(i = 0; i < q->numverts; i++){ |
---|
1371 | dq += q->verts[i].xyz[2]; |
---|
1372 | } |
---|
1373 | dq /= (GLfloat)q->numverts; |
---|
1374 | |
---|
1375 | for(i = 0; i < w->numverts; i++){ |
---|
1376 | dw += w->verts[i].xyz[2]; |
---|
1377 | } |
---|
1378 | dw /= (GLfloat)w->numverts; |
---|
1379 | |
---|
1380 | diff = dq - dw; |
---|
1381 | if(diff > 0.){ |
---|
1382 | return -1; |
---|
1383 | } |
---|
1384 | else if(diff < 0.){ |
---|
1385 | return 1; |
---|
1386 | } |
---|
1387 | else{ |
---|
1388 | return 0; |
---|
1389 | } |
---|
1390 | } |
---|
1391 | |
---|
1392 | static int gl2psTrianglesFirst(const void *a, const void *b) |
---|
1393 | { |
---|
1394 | GL2PSprimitive *q, *w; |
---|
1395 | |
---|
1396 | q = *(GL2PSprimitive**)a; |
---|
1397 | w = *(GL2PSprimitive**)b; |
---|
1398 | return (q->type < w->type ? 1 : -1); |
---|
1399 | } |
---|
1400 | |
---|
1401 | static GLint gl2psFindRoot(GL2PSlist *primitives, GL2PSprimitive **root) |
---|
1402 | { |
---|
1403 | GLint i, j, count, best = 1000000, index = 0; |
---|
1404 | GL2PSprimitive *prim1, *prim2; |
---|
1405 | GL2PSplane plane; |
---|
1406 | GLint maxp; |
---|
1407 | |
---|
1408 | if(!gl2psListNbr(primitives)){ |
---|
1409 | gl2psMsg(GL2PS_ERROR, "Cannot fint root in empty primitive list"); |
---|
1410 | return 0; |
---|
1411 | } |
---|
1412 | |
---|
1413 | *root = *(GL2PSprimitive**)gl2psListPointer(primitives, 0); |
---|
1414 | |
---|
1415 | if(gl2ps->options & GL2PS_BEST_ROOT){ |
---|
1416 | maxp = gl2psListNbr(primitives); |
---|
1417 | if(maxp > gl2ps->maxbestroot){ |
---|
1418 | maxp = gl2ps->maxbestroot; |
---|
1419 | } |
---|
1420 | for(i = 0; i < maxp; i++){ |
---|
1421 | prim1 = *(GL2PSprimitive**)gl2psListPointer(primitives, i); |
---|
1422 | gl2psGetPlane(prim1, plane); |
---|
1423 | count = 0; |
---|
1424 | for(j = 0; j < gl2psListNbr(primitives); j++){ |
---|
1425 | if(j != i){ |
---|
1426 | prim2 = *(GL2PSprimitive**)gl2psListPointer(primitives, j); |
---|
1427 | count += gl2psTestSplitPrimitive(prim2, plane); |
---|
1428 | } |
---|
1429 | if(count > best) break; |
---|
1430 | } |
---|
1431 | if(count < best){ |
---|
1432 | best = count; |
---|
1433 | index = i; |
---|
1434 | *root = prim1; |
---|
1435 | if(!count) return index; |
---|
1436 | } |
---|
1437 | } |
---|
1438 | /* if(index) gl2psMsg(GL2PS_INFO, "GL2PS_BEST_ROOT was worth it: %d", index); */ |
---|
1439 | return index; |
---|
1440 | } |
---|
1441 | else{ |
---|
1442 | return 0; |
---|
1443 | } |
---|
1444 | } |
---|
1445 | |
---|
1446 | static void gl2psFreeImagemap(GL2PSimagemap *list) |
---|
1447 | { |
---|
1448 | GL2PSimagemap *next; |
---|
1449 | while(list != NULL){ |
---|
1450 | next = list->next; |
---|
1451 | gl2psFree(list->image->pixels); |
---|
1452 | gl2psFree(list->image); |
---|
1453 | gl2psFree(list); |
---|
1454 | list = next; |
---|
1455 | } |
---|
1456 | } |
---|
1457 | |
---|
1458 | static void gl2psFreePrimitive(void *data) |
---|
1459 | { |
---|
1460 | GL2PSprimitive *q; |
---|
1461 | |
---|
1462 | q = *(GL2PSprimitive**)data; |
---|
1463 | gl2psFree(q->verts); |
---|
1464 | if(q->type == GL2PS_TEXT || q->type == GL2PS_SPECIAL){ |
---|
1465 | gl2psFreeText(q->data.text); |
---|
1466 | } |
---|
1467 | else if(q->type == GL2PS_PIXMAP){ |
---|
1468 | gl2psFreePixmap(q->data.image); |
---|
1469 | } |
---|
1470 | gl2psFree(q); |
---|
1471 | } |
---|
1472 | |
---|
1473 | static void gl2psAddPrimitiveInList(GL2PSprimitive *prim, GL2PSlist *list) |
---|
1474 | { |
---|
1475 | GL2PSprimitive *t1, *t2; |
---|
1476 | |
---|
1477 | if(prim->type != GL2PS_QUADRANGLE){ |
---|
1478 | gl2psListAdd(list, &prim); |
---|
1479 | } |
---|
1480 | else{ |
---|
1481 | gl2psDivideQuad(prim, &t1, &t2); |
---|
1482 | gl2psListAdd(list, &t1); |
---|
1483 | gl2psListAdd(list, &t2); |
---|
1484 | gl2psFreePrimitive(&prim); |
---|
1485 | } |
---|
1486 | |
---|
1487 | } |
---|
1488 | |
---|
1489 | static void gl2psFreeBspTree(GL2PSbsptree **tree) |
---|
1490 | { |
---|
1491 | if(*tree){ |
---|
1492 | if((*tree)->back) gl2psFreeBspTree(&(*tree)->back); |
---|
1493 | if((*tree)->primitives){ |
---|
1494 | gl2psListAction((*tree)->primitives, gl2psFreePrimitive); |
---|
1495 | gl2psListDelete((*tree)->primitives); |
---|
1496 | } |
---|
1497 | if((*tree)->front) gl2psFreeBspTree(&(*tree)->front); |
---|
1498 | gl2psFree(*tree); |
---|
1499 | *tree = NULL; |
---|
1500 | } |
---|
1501 | } |
---|
1502 | |
---|
1503 | static GLboolean gl2psGreater(GLfloat f1, GLfloat f2) |
---|
1504 | { |
---|
1505 | if(f1 > f2) return GL_TRUE; |
---|
1506 | else return GL_FALSE; |
---|
1507 | } |
---|
1508 | |
---|
1509 | static GLboolean gl2psLess(GLfloat f1, GLfloat f2) |
---|
1510 | { |
---|
1511 | if(f1 < f2) return GL_TRUE; |
---|
1512 | else return GL_FALSE; |
---|
1513 | } |
---|
1514 | |
---|
1515 | static void gl2psBuildBspTree(GL2PSbsptree *tree, GL2PSlist *primitives) |
---|
1516 | { |
---|
1517 | GL2PSprimitive *prim, *frontprim = NULL, *backprim = NULL; |
---|
1518 | GL2PSlist *frontlist, *backlist; |
---|
1519 | GLint i, index; |
---|
1520 | |
---|
1521 | tree->front = NULL; |
---|
1522 | tree->back = NULL; |
---|
1523 | tree->primitives = gl2psListCreate(1, 2, sizeof(GL2PSprimitive*)); |
---|
1524 | index = gl2psFindRoot(primitives, &prim); |
---|
1525 | gl2psGetPlane(prim, tree->plane); |
---|
1526 | gl2psAddPrimitiveInList(prim, tree->primitives); |
---|
1527 | |
---|
1528 | frontlist = gl2psListCreate(1, 2, sizeof(GL2PSprimitive*)); |
---|
1529 | backlist = gl2psListCreate(1, 2, sizeof(GL2PSprimitive*)); |
---|
1530 | |
---|
1531 | for(i = 0; i < gl2psListNbr(primitives); i++){ |
---|
1532 | if(i != index){ |
---|
1533 | prim = *(GL2PSprimitive**)gl2psListPointer(primitives,i); |
---|
1534 | switch(gl2psSplitPrimitive(prim, tree->plane, &frontprim, &backprim)){ |
---|
1535 | case GL2PS_COINCIDENT: |
---|
1536 | gl2psAddPrimitiveInList(prim, tree->primitives); |
---|
1537 | break; |
---|
1538 | case GL2PS_IN_BACK_OF: |
---|
1539 | gl2psAddPrimitiveInList(prim, backlist); |
---|
1540 | break; |
---|
1541 | case GL2PS_IN_FRONT_OF: |
---|
1542 | gl2psAddPrimitiveInList(prim, frontlist); |
---|
1543 | break; |
---|
1544 | case GL2PS_SPANNING: |
---|
1545 | gl2psAddPrimitiveInList(backprim, backlist); |
---|
1546 | gl2psAddPrimitiveInList(frontprim, frontlist); |
---|
1547 | gl2psFreePrimitive(&prim); |
---|
1548 | break; |
---|
1549 | } |
---|
1550 | } |
---|
1551 | } |
---|
1552 | |
---|
1553 | if(gl2psListNbr(tree->primitives)){ |
---|
1554 | gl2psListSort(tree->primitives, gl2psTrianglesFirst); |
---|
1555 | } |
---|
1556 | |
---|
1557 | if(gl2psListNbr(frontlist)){ |
---|
1558 | gl2psListSort(frontlist, gl2psTrianglesFirst); |
---|
1559 | tree->front = (GL2PSbsptree*)gl2psMalloc(sizeof(GL2PSbsptree)); |
---|
1560 | gl2psBuildBspTree(tree->front, frontlist); |
---|
1561 | } |
---|
1562 | else{ |
---|
1563 | gl2psListDelete(frontlist); |
---|
1564 | } |
---|
1565 | |
---|
1566 | if(gl2psListNbr(backlist)){ |
---|
1567 | gl2psListSort(backlist, gl2psTrianglesFirst); |
---|
1568 | tree->back = (GL2PSbsptree*)gl2psMalloc(sizeof(GL2PSbsptree)); |
---|
1569 | gl2psBuildBspTree(tree->back, backlist); |
---|
1570 | } |
---|
1571 | else{ |
---|
1572 | gl2psListDelete(backlist); |
---|
1573 | } |
---|
1574 | |
---|
1575 | gl2psListDelete(primitives); |
---|
1576 | } |
---|
1577 | |
---|
1578 | static void gl2psTraverseBspTree(GL2PSbsptree *tree, GL2PSxyz eye, GLfloat epsilon, |
---|
1579 | GLboolean (*compare)(GLfloat f1, GLfloat f2), |
---|
1580 | void (*action)(void *data), int inverse) |
---|
1581 | { |
---|
1582 | GLfloat result; |
---|
1583 | |
---|
1584 | if(!tree) return; |
---|
1585 | |
---|
1586 | result = gl2psComparePointPlane(eye, tree->plane); |
---|
1587 | |
---|
1588 | if(GL_TRUE == compare(result, epsilon)){ |
---|
1589 | gl2psTraverseBspTree(tree->back, eye, epsilon, compare, action, inverse); |
---|
1590 | if(inverse){ |
---|
1591 | gl2psListActionInverse(tree->primitives, action); |
---|
1592 | } |
---|
1593 | else{ |
---|
1594 | gl2psListAction(tree->primitives, action); |
---|
1595 | } |
---|
1596 | gl2psTraverseBspTree(tree->front, eye, epsilon, compare, action, inverse); |
---|
1597 | } |
---|
1598 | else if(GL_TRUE == compare(-epsilon, result)){ |
---|
1599 | gl2psTraverseBspTree(tree->front, eye, epsilon, compare, action, inverse); |
---|
1600 | if(inverse){ |
---|
1601 | gl2psListActionInverse(tree->primitives, action); |
---|
1602 | } |
---|
1603 | else{ |
---|
1604 | gl2psListAction(tree->primitives, action); |
---|
1605 | } |
---|
1606 | gl2psTraverseBspTree(tree->back, eye, epsilon, compare, action, inverse); |
---|
1607 | } |
---|
1608 | else{ |
---|
1609 | gl2psTraverseBspTree(tree->front, eye, epsilon, compare, action, inverse); |
---|
1610 | gl2psTraverseBspTree(tree->back, eye, epsilon, compare, action, inverse); |
---|
1611 | } |
---|
1612 | } |
---|
1613 | |
---|
1614 | static void gl2psRescaleAndOffset() |
---|
1615 | { |
---|
1616 | GL2PSprimitive *prim; |
---|
1617 | GLfloat minZ, maxZ, rangeZ, scaleZ; |
---|
1618 | GLfloat factor, units, area, dZ, dZdX, dZdY, maxdZ; |
---|
1619 | int i, j; |
---|
1620 | |
---|
1621 | if(!gl2psListNbr(gl2ps->primitives)) |
---|
1622 | return; |
---|
1623 | |
---|
1624 | /* get z-buffer range */ |
---|
1625 | prim = *(GL2PSprimitive**)gl2psListPointer(gl2ps->primitives, 0); |
---|
1626 | minZ = maxZ = prim->verts[0].xyz[2]; |
---|
1627 | for(i = 1; i < prim->numverts; i++){ |
---|
1628 | if(prim->verts[i].xyz[2] < minZ) minZ = prim->verts[i].xyz[2]; |
---|
1629 | if(prim->verts[i].xyz[2] > maxZ) maxZ = prim->verts[i].xyz[2]; |
---|
1630 | } |
---|
1631 | for(i = 1; i < gl2psListNbr(gl2ps->primitives); i++){ |
---|
1632 | prim = *(GL2PSprimitive**)gl2psListPointer(gl2ps->primitives, i); |
---|
1633 | for(j = 0; j < prim->numverts; j++){ |
---|
1634 | if(prim->verts[j].xyz[2] < minZ) minZ = prim->verts[j].xyz[2]; |
---|
1635 | if(prim->verts[j].xyz[2] > maxZ) maxZ = prim->verts[j].xyz[2]; |
---|
1636 | } |
---|
1637 | } |
---|
1638 | rangeZ = (maxZ - minZ); |
---|
1639 | |
---|
1640 | /* rescale z-buffer coordinate in [0,GL2PS_ZSCALE], to make it of |
---|
1641 | the same order of magnitude as the x and y coordinates */ |
---|
1642 | scaleZ = GL2PS_ZERO(rangeZ) ? GL2PS_ZSCALE : (GL2PS_ZSCALE / rangeZ); |
---|
1643 | /* avoid precision loss (we use floats!) */ |
---|
1644 | if(scaleZ > 100000.F) scaleZ = 100000.F; |
---|
1645 | |
---|
1646 | /* apply offsets */ |
---|
1647 | for(i = 0; i < gl2psListNbr(gl2ps->primitives); i++){ |
---|
1648 | prim = *(GL2PSprimitive**)gl2psListPointer(gl2ps->primitives, i); |
---|
1649 | for(j = 0; j < prim->numverts; j++){ |
---|
1650 | prim->verts[j].xyz[2] = (prim->verts[j].xyz[2] - minZ) * scaleZ; |
---|
1651 | } |
---|
1652 | if((gl2ps->options & GL2PS_SIMPLE_LINE_OFFSET) && |
---|
1653 | (prim->type == GL2PS_LINE)){ |
---|
1654 | if(gl2ps->sort == GL2PS_SIMPLE_SORT){ |
---|
1655 | prim->verts[0].xyz[2] -= GL2PS_ZOFFSET_LARGE; |
---|
1656 | prim->verts[1].xyz[2] -= GL2PS_ZOFFSET_LARGE; |
---|
1657 | } |
---|
1658 | else{ |
---|
1659 | prim->verts[0].xyz[2] -= GL2PS_ZOFFSET; |
---|
1660 | prim->verts[1].xyz[2] -= GL2PS_ZOFFSET; |
---|
1661 | } |
---|
1662 | } |
---|
1663 | else if(prim->offset && (prim->type == GL2PS_TRIANGLE)){ |
---|
1664 | factor = gl2ps->offset[0]; |
---|
1665 | units = gl2ps->offset[1]; |
---|
1666 | area = |
---|
1667 | (prim->verts[1].xyz[0] - prim->verts[0].xyz[0]) * |
---|
1668 | (prim->verts[2].xyz[1] - prim->verts[1].xyz[1]) - |
---|
1669 | (prim->verts[2].xyz[0] - prim->verts[1].xyz[0]) * |
---|
1670 | (prim->verts[1].xyz[1] - prim->verts[0].xyz[1]); |
---|
1671 | if(!GL2PS_ZERO(area)){ |
---|
1672 | dZdX = |
---|
1673 | ((prim->verts[2].xyz[1] - prim->verts[1].xyz[1]) * |
---|
1674 | (prim->verts[1].xyz[2] - prim->verts[0].xyz[2]) - |
---|
1675 | (prim->verts[1].xyz[1] - prim->verts[0].xyz[1]) * |
---|
1676 | (prim->verts[2].xyz[2] - prim->verts[1].xyz[2])) / area; |
---|
1677 | dZdY = |
---|
1678 | ((prim->verts[1].xyz[0] - prim->verts[0].xyz[0]) * |
---|
1679 | (prim->verts[2].xyz[2] - prim->verts[1].xyz[2]) - |
---|
1680 | (prim->verts[2].xyz[0] - prim->verts[1].xyz[0]) * |
---|
1681 | (prim->verts[1].xyz[2] - prim->verts[0].xyz[2])) / area; |
---|
1682 | maxdZ = (GLfloat)sqrt(dZdX * dZdX + dZdY * dZdY); |
---|
1683 | } |
---|
1684 | else{ |
---|
1685 | maxdZ = 0.0F; |
---|
1686 | } |
---|
1687 | dZ = factor * maxdZ + units; |
---|
1688 | prim->verts[0].xyz[2] += dZ; |
---|
1689 | prim->verts[1].xyz[2] += dZ; |
---|
1690 | prim->verts[2].xyz[2] += dZ; |
---|
1691 | } |
---|
1692 | } |
---|
1693 | } |
---|
1694 | |
---|
1695 | /********************************************************************* |
---|
1696 | * |
---|
1697 | * 2D sorting routines (for occlusion culling) |
---|
1698 | * |
---|
1699 | *********************************************************************/ |
---|
1700 | |
---|
1701 | static GLint gl2psGetPlaneFromPoints(GL2PSxyz a, GL2PSxyz b, GL2PSplane plane) |
---|
1702 | { |
---|
1703 | GLfloat n; |
---|
1704 | |
---|
1705 | plane[0] = b[1] - a[1]; |
---|
1706 | plane[1] = a[0] - b[0]; |
---|
1707 | n = (GLfloat)sqrt(plane[0]*plane[0] + plane[1]*plane[1]); |
---|
1708 | plane[2] = 0.0F; |
---|
1709 | if(!GL2PS_ZERO(n)){ |
---|
1710 | plane[0] /= n; |
---|
1711 | plane[1] /= n; |
---|
1712 | plane[3] = -plane[0]*a[0]-plane[1]*a[1]; |
---|
1713 | return 1; |
---|
1714 | } |
---|
1715 | else{ |
---|
1716 | plane[0] = -1.0F; |
---|
1717 | plane[1] = 0.0F; |
---|
1718 | plane[3] = a[0]; |
---|
1719 | return 0; |
---|
1720 | } |
---|
1721 | } |
---|
1722 | |
---|
1723 | static void gl2psFreeBspImageTree(GL2PSbsptree2d **tree) |
---|
1724 | { |
---|
1725 | if(*tree){ |
---|
1726 | if((*tree)->back) gl2psFreeBspImageTree(&(*tree)->back); |
---|
1727 | if((*tree)->front) gl2psFreeBspImageTree(&(*tree)->front); |
---|
1728 | gl2psFree(*tree); |
---|
1729 | *tree = NULL; |
---|
1730 | } |
---|
1731 | } |
---|
1732 | |
---|
1733 | static GLint gl2psCheckPoint(GL2PSxyz point, GL2PSplane plane) |
---|
1734 | { |
---|
1735 | GLfloat pt_dis; |
---|
1736 | |
---|
1737 | pt_dis = gl2psComparePointPlane(point, plane); |
---|
1738 | if(pt_dis > GL2PS_EPSILON) return GL2PS_POINT_INFRONT; |
---|
1739 | else if(pt_dis < -GL2PS_EPSILON) return GL2PS_POINT_BACK; |
---|
1740 | else return GL2PS_POINT_COINCIDENT; |
---|
1741 | } |
---|
1742 | |
---|
1743 | static void gl2psAddPlanesInBspTreeImage(GL2PSprimitive *prim, |
---|
1744 | GL2PSbsptree2d **tree) |
---|
1745 | { |
---|
1746 | GLint ret = 0; |
---|
1747 | GLint i; |
---|
1748 | GLint offset = 0; |
---|
1749 | GL2PSbsptree2d *head = NULL, *cur = NULL; |
---|
1750 | |
---|
1751 | if((*tree == NULL) && (prim->numverts > 2)){ |
---|
1752 | /* don't cull if transparent |
---|
1753 | for(i = 0; i < prim->numverts - 1; i++) |
---|
1754 | if(prim->verts[i].rgba[3] < 1.0F) return; |
---|
1755 | */ |
---|
1756 | head = (GL2PSbsptree2d*)gl2psMalloc(sizeof(GL2PSbsptree2d)); |
---|
1757 | for(i = 0; i < prim->numverts-1; i++){ |
---|
1758 | if(!gl2psGetPlaneFromPoints(prim->verts[i].xyz, |
---|
1759 | prim->verts[i+1].xyz, |
---|
1760 | head->plane)){ |
---|
1761 | if(prim->numverts-i > 3){ |
---|
1762 | offset++; |
---|
1763 | } |
---|
1764 | else{ |
---|
1765 | gl2psFree(head); |
---|
1766 | return; |
---|
1767 | } |
---|
1768 | } |
---|
1769 | else{ |
---|
1770 | break; |
---|
1771 | } |
---|
1772 | } |
---|
1773 | head->back = NULL; |
---|
1774 | head->front = NULL; |
---|
1775 | for(i = 2+offset; i < prim->numverts; i++){ |
---|
1776 | ret = gl2psCheckPoint(prim->verts[i].xyz, head->plane); |
---|
1777 | if(ret != GL2PS_POINT_COINCIDENT) break; |
---|
1778 | } |
---|
1779 | switch(ret){ |
---|
1780 | case GL2PS_POINT_INFRONT : |
---|
1781 | cur = head; |
---|
1782 | for(i = 1+offset; i < prim->numverts-1; i++){ |
---|
1783 | if(cur->front == NULL){ |
---|
1784 | cur->front = (GL2PSbsptree2d*)gl2psMalloc(sizeof(GL2PSbsptree2d)); |
---|
1785 | } |
---|
1786 | if(gl2psGetPlaneFromPoints(prim->verts[i].xyz, |
---|
1787 | prim->verts[i+1].xyz, |
---|
1788 | cur->front->plane)){ |
---|
1789 | cur = cur->front; |
---|
1790 | cur->front = NULL; |
---|
1791 | cur->back = NULL; |
---|
1792 | } |
---|
1793 | } |
---|
1794 | if(cur->front == NULL){ |
---|
1795 | cur->front = (GL2PSbsptree2d*)gl2psMalloc(sizeof(GL2PSbsptree2d)); |
---|
1796 | } |
---|
1797 | if(gl2psGetPlaneFromPoints(prim->verts[i].xyz, |
---|
1798 | prim->verts[offset].xyz, |
---|
1799 | cur->front->plane)){ |
---|
1800 | cur->front->front = NULL; |
---|
1801 | cur->front->back = NULL; |
---|
1802 | } |
---|
1803 | else{ |
---|
1804 | gl2psFree(cur->front); |
---|
1805 | cur->front = NULL; |
---|
1806 | } |
---|
1807 | break; |
---|
1808 | case GL2PS_POINT_BACK : |
---|
1809 | for(i = 0; i < 4; i++){ |
---|
1810 | head->plane[i] = -head->plane[i]; |
---|
1811 | } |
---|
1812 | cur = head; |
---|
1813 | for(i = 1+offset; i < prim->numverts-1; i++){ |
---|
1814 | if(cur->front == NULL){ |
---|
1815 | cur->front = (GL2PSbsptree2d*)gl2psMalloc(sizeof(GL2PSbsptree2d)); |
---|
1816 | } |
---|
1817 | if(gl2psGetPlaneFromPoints(prim->verts[i+1].xyz, |
---|
1818 | prim->verts[i].xyz, |
---|
1819 | cur->front->plane)){ |
---|
1820 | cur = cur->front; |
---|
1821 | cur->front = NULL; |
---|
1822 | cur->back = NULL; |
---|
1823 | } |
---|
1824 | } |
---|
1825 | if(cur->front == NULL){ |
---|
1826 | cur->front = (GL2PSbsptree2d*)gl2psMalloc(sizeof(GL2PSbsptree2d)); |
---|
1827 | } |
---|
1828 | if(gl2psGetPlaneFromPoints(prim->verts[offset].xyz, |
---|
1829 | prim->verts[i].xyz, |
---|
1830 | cur->front->plane)){ |
---|
1831 | cur->front->front = NULL; |
---|
1832 | cur->front->back = NULL; |
---|
1833 | } |
---|
1834 | else{ |
---|
1835 | gl2psFree(cur->front); |
---|
1836 | cur->front = NULL; |
---|
1837 | } |
---|
1838 | break; |
---|
1839 | default: |
---|
1840 | gl2psFree(head); |
---|
1841 | return; |
---|
1842 | } |
---|
1843 | (*tree) = head; |
---|
1844 | } |
---|
1845 | } |
---|
1846 | |
---|
1847 | static GLint gl2psCheckPrimitive(GL2PSprimitive *prim, GL2PSplane plane) |
---|
1848 | { |
---|
1849 | GLint i; |
---|
1850 | GLint pos; |
---|
1851 | |
---|
1852 | pos = gl2psCheckPoint(prim->verts[0].xyz, plane); |
---|
1853 | for(i = 1; i < prim->numverts; i++){ |
---|
1854 | pos |= gl2psCheckPoint(prim->verts[i].xyz, plane); |
---|
1855 | if(pos == (GL2PS_POINT_INFRONT | GL2PS_POINT_BACK)) return GL2PS_SPANNING; |
---|
1856 | } |
---|
1857 | if(pos & GL2PS_POINT_INFRONT) return GL2PS_IN_FRONT_OF; |
---|
1858 | else if(pos & GL2PS_POINT_BACK) return GL2PS_IN_BACK_OF; |
---|
1859 | else return GL2PS_COINCIDENT; |
---|
1860 | } |
---|
1861 | |
---|
1862 | static GL2PSprimitive *gl2psCreateSplitPrimitive2D(GL2PSprimitive *parent, |
---|
1863 | GLshort numverts, |
---|
1864 | GL2PSvertex *vertx) |
---|
1865 | { |
---|
1866 | GLint i; |
---|
1867 | GL2PSprimitive *child = (GL2PSprimitive*)gl2psMalloc(sizeof(GL2PSprimitive)); |
---|
1868 | |
---|
1869 | if(parent->type == GL2PS_IMAGEMAP){ |
---|
1870 | child->type = GL2PS_IMAGEMAP; |
---|
1871 | child->data.image = parent->data.image; |
---|
1872 | } |
---|
1873 | else { |
---|
1874 | switch(numverts){ |
---|
1875 | case 1 : child->type = GL2PS_POINT; break; |
---|
1876 | case 2 : child->type = GL2PS_LINE; break; |
---|
1877 | case 3 : child->type = GL2PS_TRIANGLE; break; |
---|
1878 | case 4 : child->type = GL2PS_QUADRANGLE; break; |
---|
1879 | default: child->type = GL2PS_NO_TYPE; break; /* FIXME */ |
---|
1880 | } |
---|
1881 | } |
---|
1882 | child->boundary = 0; /* FIXME: not done! */ |
---|
1883 | child->culled = parent->culled; |
---|
1884 | child->offset = parent->offset; |
---|
1885 | child->pattern = parent->pattern; |
---|
1886 | child->factor = parent->factor; |
---|
1887 | child->width = parent->width; |
---|
1888 | child->numverts = numverts; |
---|
1889 | child->verts = (GL2PSvertex*)gl2psMalloc(numverts * sizeof(GL2PSvertex)); |
---|
1890 | for(i = 0; i < numverts; i++){ |
---|
1891 | child->verts[i] = vertx[i]; |
---|
1892 | } |
---|
1893 | return child; |
---|
1894 | } |
---|
1895 | |
---|
1896 | static void gl2psSplitPrimitive2D(GL2PSprimitive *prim, |
---|
1897 | GL2PSplane plane, |
---|
1898 | GL2PSprimitive **front, |
---|
1899 | GL2PSprimitive **back) |
---|
1900 | { |
---|
1901 | /* cur will hold the position of the current vertex |
---|
1902 | prev will hold the position of the previous vertex |
---|
1903 | prev0 will hold the position of the vertex number 0 |
---|
1904 | v1 and v2 represent the current and previous vertices, respectively |
---|
1905 | flag is set if the current vertex should be checked against the plane */ |
---|
1906 | GLint cur = -1, prev = -1, i, v1 = 0, v2 = 0, flag = 1, prev0 = -1; |
---|
1907 | |
---|
1908 | /* list of vertices that will go in front and back primitive */ |
---|
1909 | GL2PSvertex *front_list = NULL, *back_list = NULL; |
---|
1910 | |
---|
1911 | /* number of vertices in front and back list */ |
---|
1912 | GLshort front_count = 0, back_count = 0; |
---|
1913 | |
---|
1914 | for(i = 0; i <= prim->numverts; i++){ |
---|
1915 | v1 = i; |
---|
1916 | if(v1 == prim->numverts){ |
---|
1917 | if(prim->numverts < 3) break; |
---|
1918 | v1 = 0; |
---|
1919 | v2 = prim->numverts - 1; |
---|
1920 | cur = prev0; |
---|
1921 | } |
---|
1922 | else if(flag){ |
---|
1923 | cur = gl2psCheckPoint(prim->verts[v1].xyz, plane); |
---|
1924 | if(i == 0){ |
---|
1925 | prev0 = cur; |
---|
1926 | } |
---|
1927 | } |
---|
1928 | if(((prev == -1) || (prev == cur) || (prev == 0) || (cur == 0)) && |
---|
1929 | (i < prim->numverts)){ |
---|
1930 | if(cur == GL2PS_POINT_INFRONT){ |
---|
1931 | front_count++; |
---|
1932 | front_list = (GL2PSvertex*)gl2psRealloc(front_list, |
---|
1933 | sizeof(GL2PSvertex)*front_count); |
---|
1934 | front_list[front_count-1] = prim->verts[v1]; |
---|
1935 | } |
---|
1936 | else if(cur == GL2PS_POINT_BACK){ |
---|
1937 | back_count++; |
---|
1938 | back_list = (GL2PSvertex*)gl2psRealloc(back_list, |
---|
1939 | sizeof(GL2PSvertex)*back_count); |
---|
1940 | back_list[back_count-1] = prim->verts[v1]; |
---|
1941 | } |
---|
1942 | else{ |
---|
1943 | front_count++; |
---|
1944 | front_list = (GL2PSvertex*)gl2psRealloc(front_list, |
---|
1945 | sizeof(GL2PSvertex)*front_count); |
---|
1946 | front_list[front_count-1] = prim->verts[v1]; |
---|
1947 | back_count++; |
---|
1948 | back_list = (GL2PSvertex*)gl2psRealloc(back_list, |
---|
1949 | sizeof(GL2PSvertex)*back_count); |
---|
1950 | back_list[back_count-1] = prim->verts[v1]; |
---|
1951 | } |
---|
1952 | flag = 1; |
---|
1953 | } |
---|
1954 | else if((prev != cur) && (cur != 0) && (prev != 0)){ |
---|
1955 | if(v1 != 0){ |
---|
1956 | v2 = v1-1; |
---|
1957 | i--; |
---|
1958 | } |
---|
1959 | front_count++; |
---|
1960 | front_list = (GL2PSvertex*)gl2psRealloc(front_list, |
---|
1961 | sizeof(GL2PSvertex)*front_count); |
---|
1962 | gl2psCutEdge(&prim->verts[v2], &prim->verts[v1], |
---|
1963 | plane, &front_list[front_count-1]); |
---|
1964 | back_count++; |
---|
1965 | back_list = (GL2PSvertex*)gl2psRealloc(back_list, |
---|
1966 | sizeof(GL2PSvertex)*back_count); |
---|
1967 | back_list[back_count-1] = front_list[front_count-1]; |
---|
1968 | flag = 0; |
---|
1969 | } |
---|
1970 | prev = cur; |
---|
1971 | } |
---|
1972 | *front = gl2psCreateSplitPrimitive2D(prim, front_count, front_list); |
---|
1973 | *back = gl2psCreateSplitPrimitive2D(prim, back_count, back_list); |
---|
1974 | gl2psFree(front_list); |
---|
1975 | gl2psFree(back_list); |
---|
1976 | } |
---|
1977 | |
---|
1978 | static GLint gl2psAddInBspImageTree(GL2PSprimitive *prim, GL2PSbsptree2d **tree) |
---|
1979 | { |
---|
1980 | GLint ret = 0; |
---|
1981 | GL2PSprimitive *frontprim = NULL, *backprim = NULL; |
---|
1982 | |
---|
1983 | /* FIXME: until we consider the actual extent of text strings and |
---|
1984 | pixmaps, never cull them. Otherwise the whole string/pixmap gets |
---|
1985 | culled as soon as the reference point is hidden */ |
---|
1986 | if(prim->type == GL2PS_PIXMAP || |
---|
1987 | prim->type == GL2PS_TEXT || |
---|
1988 | prim->type == GL2PS_SPECIAL){ |
---|
1989 | return 1; |
---|
1990 | } |
---|
1991 | |
---|
1992 | if(*tree == NULL){ |
---|
1993 | if((prim->type != GL2PS_IMAGEMAP) && (GL_FALSE == gl2ps->zerosurfacearea)){ |
---|
1994 | gl2psAddPlanesInBspTreeImage(gl2ps->primitivetoadd, tree); |
---|
1995 | } |
---|
1996 | return 1; |
---|
1997 | } |
---|
1998 | else{ |
---|
1999 | switch(gl2psCheckPrimitive(prim, (*tree)->plane)){ |
---|
2000 | case GL2PS_IN_BACK_OF: return gl2psAddInBspImageTree(prim, &(*tree)->back); |
---|
2001 | case GL2PS_IN_FRONT_OF: |
---|
2002 | if((*tree)->front != NULL) return gl2psAddInBspImageTree(prim, &(*tree)->front); |
---|
2003 | else return 0; |
---|
2004 | case GL2PS_SPANNING: |
---|
2005 | gl2psSplitPrimitive2D(prim, (*tree)->plane, &frontprim, &backprim); |
---|
2006 | ret = gl2psAddInBspImageTree(backprim, &(*tree)->back); |
---|
2007 | if((*tree)->front != NULL){ |
---|
2008 | if(gl2psAddInBspImageTree(frontprim, &(*tree)->front)){ |
---|
2009 | ret = 1; |
---|
2010 | } |
---|
2011 | } |
---|
2012 | gl2psFree(frontprim->verts); |
---|
2013 | gl2psFree(frontprim); |
---|
2014 | gl2psFree(backprim->verts); |
---|
2015 | gl2psFree(backprim); |
---|
2016 | return ret; |
---|
2017 | case GL2PS_COINCIDENT: |
---|
2018 | if((*tree)->back != NULL){ |
---|
2019 | gl2ps->zerosurfacearea = GL_TRUE; |
---|
2020 | ret = gl2psAddInBspImageTree(prim, &(*tree)->back); |
---|
2021 | gl2ps->zerosurfacearea = GL_FALSE; |
---|
2022 | if(ret) return ret; |
---|
2023 | } |
---|
2024 | if((*tree)->front != NULL){ |
---|
2025 | gl2ps->zerosurfacearea = GL_TRUE; |
---|
2026 | ret = gl2psAddInBspImageTree(prim, &(*tree)->front); |
---|
2027 | gl2ps->zerosurfacearea = GL_FALSE; |
---|
2028 | if(ret) return ret; |
---|
2029 | } |
---|
2030 | if(prim->type == GL2PS_LINE) return 1; |
---|
2031 | else return 0; |
---|
2032 | } |
---|
2033 | } |
---|
2034 | return 0; |
---|
2035 | } |
---|
2036 | |
---|
2037 | static void gl2psAddInImageTree(void *data) |
---|
2038 | { |
---|
2039 | GL2PSprimitive *prim = *(GL2PSprimitive **)data; |
---|
2040 | gl2ps->primitivetoadd = prim; |
---|
2041 | if(prim->type == GL2PS_IMAGEMAP && prim->data.image->format == GL2PS_IMAGEMAP_VISIBLE){ |
---|
2042 | prim->culled = 1; |
---|
2043 | } |
---|
2044 | else if(!gl2psAddInBspImageTree(prim, &gl2ps->imagetree)){ |
---|
2045 | prim->culled = 1; |
---|
2046 | } |
---|
2047 | else if(prim->type == GL2PS_IMAGEMAP){ |
---|
2048 | prim->data.image->format = GL2PS_IMAGEMAP_VISIBLE; |
---|
2049 | } |
---|
2050 | } |
---|
2051 | |
---|
2052 | /* Boundary construction */ |
---|
2053 | |
---|
2054 | static void gl2psAddBoundaryInList(GL2PSprimitive *prim, GL2PSlist *list) |
---|
2055 | { |
---|
2056 | GL2PSprimitive *b; |
---|
2057 | GLshort i; |
---|
2058 | GL2PSxyz c; |
---|
2059 | |
---|
2060 | c[0] = c[1] = c[2] = 0.0F; |
---|
2061 | for(i = 0; i < prim->numverts; i++){ |
---|
2062 | c[0] += prim->verts[i].xyz[0]; |
---|
2063 | c[1] += prim->verts[i].xyz[1]; |
---|
2064 | } |
---|
2065 | c[0] /= prim->numverts; |
---|
2066 | c[1] /= prim->numverts; |
---|
2067 | |
---|
2068 | for(i = 0; i < prim->numverts; i++){ |
---|
2069 | if(prim->boundary & (GLint)pow(2., i)){ |
---|
2070 | b = (GL2PSprimitive*)gl2psMalloc(sizeof(GL2PSprimitive)); |
---|
2071 | b->type = GL2PS_LINE; |
---|
2072 | b->offset = prim->offset; |
---|
2073 | b->pattern = prim->pattern; |
---|
2074 | b->factor = prim->factor; |
---|
2075 | b->culled = prim->culled; |
---|
2076 | b->width = prim->width; |
---|
2077 | b->boundary = 0; |
---|
2078 | b->numverts = 2; |
---|
2079 | b->verts = (GL2PSvertex*)gl2psMalloc(2 * sizeof(GL2PSvertex)); |
---|
2080 | |
---|
2081 | #if 0 /* FIXME: need to work on boundary offset... */ |
---|
2082 | v[0] = c[0] - prim->verts[i].xyz[0]; |
---|
2083 | v[1] = c[1] - prim->verts[i].xyz[1]; |
---|
2084 | v[2] = 0.0F; |
---|
2085 | norm = gl2psNorm(v); |
---|
2086 | v[0] /= norm; |
---|
2087 | v[1] /= norm; |
---|
2088 | b->verts[0].xyz[0] = prim->verts[i].xyz[0] +0.1*v[0]; |
---|
2089 | b->verts[0].xyz[1] = prim->verts[i].xyz[1] +0.1*v[1]; |
---|
2090 | b->verts[0].xyz[2] = prim->verts[i].xyz[2]; |
---|
2091 | v[0] = c[0] - prim->verts[gl2psGetIndex(i, prim->numverts)].xyz[0]; |
---|
2092 | v[1] = c[1] - prim->verts[gl2psGetIndex(i, prim->numverts)].xyz[1]; |
---|
2093 | norm = gl2psNorm(v); |
---|
2094 | v[0] /= norm; |
---|
2095 | v[1] /= norm; |
---|
2096 | b->verts[1].xyz[0] = prim->verts[gl2psGetIndex(i, prim->numverts)].xyz[0] +0.1*v[0]; |
---|
2097 | b->verts[1].xyz[1] = prim->verts[gl2psGetIndex(i, prim->numverts)].xyz[1] +0.1*v[1]; |
---|
2098 | b->verts[1].xyz[2] = prim->verts[gl2psGetIndex(i, prim->numverts)].xyz[2]; |
---|
2099 | #else |
---|
2100 | b->verts[0].xyz[0] = prim->verts[i].xyz[0]; |
---|
2101 | b->verts[0].xyz[1] = prim->verts[i].xyz[1]; |
---|
2102 | b->verts[0].xyz[2] = prim->verts[i].xyz[2]; |
---|
2103 | b->verts[1].xyz[0] = prim->verts[gl2psGetIndex(i, prim->numverts)].xyz[0]; |
---|
2104 | b->verts[1].xyz[1] = prim->verts[gl2psGetIndex(i, prim->numverts)].xyz[1]; |
---|
2105 | b->verts[1].xyz[2] = prim->verts[gl2psGetIndex(i, prim->numverts)].xyz[2]; |
---|
2106 | #endif |
---|
2107 | |
---|
2108 | b->verts[0].rgba[0] = 0.0F; |
---|
2109 | b->verts[0].rgba[1] = 0.0F; |
---|
2110 | b->verts[0].rgba[2] = 0.0F; |
---|
2111 | b->verts[0].rgba[3] = 0.0F; |
---|
2112 | b->verts[1].rgba[0] = 0.0F; |
---|
2113 | b->verts[1].rgba[1] = 0.0F; |
---|
2114 | b->verts[1].rgba[2] = 0.0F; |
---|
2115 | b->verts[1].rgba[3] = 0.0F; |
---|
2116 | gl2psListAdd(list, &b); |
---|
2117 | } |
---|
2118 | } |
---|
2119 | |
---|
2120 | } |
---|
2121 | |
---|
2122 | static void gl2psBuildPolygonBoundary(GL2PSbsptree *tree) |
---|
2123 | { |
---|
2124 | GLint i; |
---|
2125 | GL2PSprimitive *prim; |
---|
2126 | |
---|
2127 | if(!tree) return; |
---|
2128 | gl2psBuildPolygonBoundary(tree->back); |
---|
2129 | for(i = 0; i < gl2psListNbr(tree->primitives); i++){ |
---|
2130 | prim = *(GL2PSprimitive**)gl2psListPointer(tree->primitives, i); |
---|
2131 | if(prim->boundary) gl2psAddBoundaryInList(prim, tree->primitives); |
---|
2132 | } |
---|
2133 | gl2psBuildPolygonBoundary(tree->front); |
---|
2134 | } |
---|
2135 | |
---|
2136 | /********************************************************************* |
---|
2137 | * |
---|
2138 | * Feedback buffer parser |
---|
2139 | * |
---|
2140 | *********************************************************************/ |
---|
2141 | |
---|
2142 | static void gl2psAddPolyPrimitive(GLshort type, GLshort numverts, |
---|
2143 | GL2PSvertex *verts, GLint offset, |
---|
2144 | GLushort pattern, GLint factor, |
---|
2145 | GLfloat width, char boundary) |
---|
2146 | { |
---|
2147 | GL2PSprimitive *prim; |
---|
2148 | |
---|
2149 | prim = (GL2PSprimitive*)gl2psMalloc(sizeof(GL2PSprimitive)); |
---|
2150 | prim->type = type; |
---|
2151 | prim->numverts = numverts; |
---|
2152 | prim->verts = (GL2PSvertex*)gl2psMalloc(numverts * sizeof(GL2PSvertex)); |
---|
2153 | memcpy(prim->verts, verts, numverts * sizeof(GL2PSvertex)); |
---|
2154 | prim->boundary = boundary; |
---|
2155 | prim->offset = offset; |
---|
2156 | prim->pattern = pattern; |
---|
2157 | prim->factor = factor; |
---|
2158 | prim->width = width; |
---|
2159 | prim->culled = 0; |
---|
2160 | |
---|
2161 | /* FIXME: here we should have an option to split stretched |
---|
2162 | tris/quads to enhance SIMPLE_SORT */ |
---|
2163 | |
---|
2164 | gl2psListAdd(gl2ps->primitives, &prim); |
---|
2165 | } |
---|
2166 | |
---|
2167 | static GLint gl2psGetVertex(GL2PSvertex *v, GLfloat *p) |
---|
2168 | { |
---|
2169 | GLint i; |
---|
2170 | |
---|
2171 | v->xyz[0] = p[0]; |
---|
2172 | v->xyz[1] = p[1]; |
---|
2173 | v->xyz[2] = p[2]; |
---|
2174 | |
---|
2175 | if(gl2ps->colormode == GL_COLOR_INDEX && gl2ps->colorsize > 0){ |
---|
2176 | i = (GLint)(p[3] + 0.5); |
---|
2177 | v->rgba[0] = gl2ps->colormap[i][0]; |
---|
2178 | v->rgba[1] = gl2ps->colormap[i][1]; |
---|
2179 | v->rgba[2] = gl2ps->colormap[i][2]; |
---|
2180 | v->rgba[3] = gl2ps->colormap[i][3]; |
---|
2181 | return 4; |
---|
2182 | } |
---|
2183 | else{ |
---|
2184 | v->rgba[0] = p[3]; |
---|
2185 | v->rgba[1] = p[4]; |
---|
2186 | v->rgba[2] = p[5]; |
---|
2187 | v->rgba[3] = p[6]; |
---|
2188 | return 7; |
---|
2189 | } |
---|
2190 | } |
---|
2191 | |
---|
2192 | static void gl2psParseFeedbackBuffer(GLint used) |
---|
2193 | { |
---|
2194 | char flag; |
---|
2195 | GLushort pattern = 0; |
---|
2196 | GLboolean boundary; |
---|
2197 | GLint i, sizeoffloat, count, v, vtot, offset = 0, factor = 0, auxindex = 0; |
---|
2198 | GLfloat lwidth = 1.0F, psize = 1.0F; |
---|
2199 | GLfloat *current; |
---|
2200 | GL2PSvertex vertices[3]; |
---|
2201 | GL2PSprimitive *prim; |
---|
2202 | GL2PSimagemap *node; |
---|
2203 | |
---|
2204 | current = gl2ps->feedback; |
---|
2205 | boundary = gl2ps->boundary = GL_FALSE; |
---|
2206 | |
---|
2207 | while(used > 0){ |
---|
2208 | |
---|
2209 | if(GL_TRUE == boundary) gl2ps->boundary = GL_TRUE; |
---|
2210 | |
---|
2211 | switch((GLint)*current){ |
---|
2212 | case GL_POINT_TOKEN : |
---|
2213 | current ++; |
---|
2214 | used --; |
---|
2215 | i = gl2psGetVertex(&vertices[0], current); |
---|
2216 | current += i; |
---|
2217 | used -= i; |
---|
2218 | gl2psAddPolyPrimitive(GL2PS_POINT, 1, vertices, 0, |
---|
2219 | pattern, factor, psize, 0); |
---|
2220 | break; |
---|
2221 | case GL_LINE_TOKEN : |
---|
2222 | case GL_LINE_RESET_TOKEN : |
---|
2223 | current ++; |
---|
2224 | used --; |
---|
2225 | i = gl2psGetVertex(&vertices[0], current); |
---|
2226 | current += i; |
---|
2227 | used -= i; |
---|
2228 | i = gl2psGetVertex(&vertices[1], current); |
---|
2229 | current += i; |
---|
2230 | used -= i; |
---|
2231 | gl2psAddPolyPrimitive(GL2PS_LINE, 2, vertices, 0, |
---|
2232 | pattern, factor, lwidth, 0); |
---|
2233 | break; |
---|
2234 | case GL_POLYGON_TOKEN : |
---|
2235 | count = (GLint)current[1]; |
---|
2236 | current += 2; |
---|
2237 | used -= 2; |
---|
2238 | v = vtot = 0; |
---|
2239 | while(count > 0 && used > 0){ |
---|
2240 | i = gl2psGetVertex(&vertices[v], current); |
---|
2241 | gl2psAdaptVertexForBlending(&vertices[v]); |
---|
2242 | current += i; |
---|
2243 | used -= i; |
---|
2244 | count --; |
---|
2245 | vtot++; |
---|
2246 | if(v == 2){ |
---|
2247 | if(GL_TRUE == boundary){ |
---|
2248 | if(!count && vtot == 2) flag = 1|2|4; |
---|
2249 | else if(!count) flag = 2|4; |
---|
2250 | else if(vtot == 2) flag = 1|2; |
---|
2251 | else flag = 2; |
---|
2252 | } |
---|
2253 | else |
---|
2254 | flag = 0; |
---|
2255 | gl2psAddPolyPrimitive(GL2PS_TRIANGLE, 3, vertices, offset, |
---|
2256 | pattern, factor, 1, flag); |
---|
2257 | vertices[1] = vertices[2]; |
---|
2258 | } |
---|
2259 | else |
---|
2260 | v ++; |
---|
2261 | } |
---|
2262 | break; |
---|
2263 | case GL_BITMAP_TOKEN : |
---|
2264 | case GL_DRAW_PIXEL_TOKEN : |
---|
2265 | case GL_COPY_PIXEL_TOKEN : |
---|
2266 | current ++; |
---|
2267 | used --; |
---|
2268 | i = gl2psGetVertex(&vertices[0], current); |
---|
2269 | current += i; |
---|
2270 | used -= i; |
---|
2271 | break; |
---|
2272 | case GL_PASS_THROUGH_TOKEN : |
---|
2273 | switch((GLint)current[1]){ |
---|
2274 | case GL2PS_BEGIN_OFFSET_TOKEN : offset = 1; break; |
---|
2275 | case GL2PS_END_OFFSET_TOKEN : offset = 0; break; |
---|
2276 | case GL2PS_BEGIN_BOUNDARY_TOKEN : boundary = GL_TRUE; break; |
---|
2277 | case GL2PS_END_BOUNDARY_TOKEN : boundary = GL_FALSE; break; |
---|
2278 | case GL2PS_END_STIPPLE_TOKEN : pattern = factor = 0; break; |
---|
2279 | case GL2PS_BEGIN_BLEND_TOKEN : gl2ps->blending = GL_TRUE; break; |
---|
2280 | case GL2PS_END_BLEND_TOKEN : gl2ps->blending = GL_FALSE; break; |
---|
2281 | case GL2PS_BEGIN_STIPPLE_TOKEN : |
---|
2282 | current += 2; |
---|
2283 | used -= 2; |
---|
2284 | pattern = (GLushort)current[1]; |
---|
2285 | current += 2; |
---|
2286 | used -= 2; |
---|
2287 | factor = (GLint)current[1]; |
---|
2288 | break; |
---|
2289 | case GL2PS_SRC_BLEND_TOKEN : |
---|
2290 | current += 2; |
---|
2291 | used -= 2; |
---|
2292 | gl2ps->blendfunc[0] = (GLint)current[1]; |
---|
2293 | break; |
---|
2294 | case GL2PS_DST_BLEND_TOKEN : |
---|
2295 | current += 2; |
---|
2296 | used -= 2; |
---|
2297 | gl2ps->blendfunc[1] = (GLint)current[1]; |
---|
2298 | break; |
---|
2299 | case GL2PS_POINT_SIZE_TOKEN : |
---|
2300 | current += 2; |
---|
2301 | used -= 2; |
---|
2302 | psize = current[1]; |
---|
2303 | break; |
---|
2304 | case GL2PS_LINE_WIDTH_TOKEN : |
---|
2305 | current += 2; |
---|
2306 | used -= 2; |
---|
2307 | lwidth = current[1]; |
---|
2308 | break; |
---|
2309 | case GL2PS_IMAGEMAP_TOKEN : |
---|
2310 | prim = (GL2PSprimitive *)gl2psMalloc(sizeof(GL2PSprimitive)); |
---|
2311 | prim->type = GL2PS_IMAGEMAP; |
---|
2312 | prim->boundary = 0; |
---|
2313 | prim->numverts = 4; |
---|
2314 | prim->verts = (GL2PSvertex *)gl2psMalloc(4 * sizeof(GL2PSvertex)); |
---|
2315 | prim->culled = 0; |
---|
2316 | prim->offset = 0; |
---|
2317 | prim->pattern = 0; |
---|
2318 | prim->factor = 0; |
---|
2319 | prim->width = 1; |
---|
2320 | |
---|
2321 | node = (GL2PSimagemap*)gl2psMalloc(sizeof(GL2PSimagemap)); |
---|
2322 | node->image = (GL2PSimage*)gl2psMalloc(sizeof(GL2PSimage)); |
---|
2323 | node->image->type = 0; |
---|
2324 | node->image->format = 0; |
---|
2325 | node->next = NULL; |
---|
2326 | |
---|
2327 | if(gl2ps->imagemap_head == NULL) |
---|
2328 | gl2ps->imagemap_head = node; |
---|
2329 | else |
---|
2330 | gl2ps->imagemap_tail->next = node; |
---|
2331 | gl2ps->imagemap_tail = node; |
---|
2332 | prim->data.image = node->image; |
---|
2333 | |
---|
2334 | current += 2; used -= 2; |
---|
2335 | i = gl2psGetVertex(&prim->verts[0], ¤t[1]); |
---|
2336 | current += i; used -= i; |
---|
2337 | |
---|
2338 | node->image->width = (GLint)current[2]; |
---|
2339 | current += 2; used -= 2; |
---|
2340 | node->image->height = (GLint)current[2]; |
---|
2341 | prim->verts[0].xyz[0] = prim->verts[0].xyz[0] - (int)(node->image->width / 2) + 0.5F; |
---|
2342 | prim->verts[0].xyz[1] = prim->verts[0].xyz[1] - (int)(node->image->height / 2) + 0.5F; |
---|
2343 | for(i = 1; i < 4; i++){ |
---|
2344 | for(v = 0; v < 3; v++){ |
---|
2345 | prim->verts[i].xyz[v] = prim->verts[0].xyz[v]; |
---|
2346 | prim->verts[i].rgba[v] = prim->verts[0].rgba[v]; |
---|
2347 | } |
---|
2348 | prim->verts[i].rgba[v] = prim->verts[0].rgba[v]; |
---|
2349 | } |
---|
2350 | prim->verts[1].xyz[0] = prim->verts[1].xyz[0] + node->image->width; |
---|
2351 | prim->verts[2].xyz[0] = prim->verts[1].xyz[0]; |
---|
2352 | prim->verts[2].xyz[1] = prim->verts[2].xyz[1] + node->image->height; |
---|
2353 | prim->verts[3].xyz[1] = prim->verts[2].xyz[1]; |
---|
2354 | |
---|
2355 | sizeoffloat = sizeof(GLfloat); |
---|
2356 | v = 2 * sizeoffloat; |
---|
2357 | vtot = node->image->height + node->image->height * |
---|
2358 | ((node->image->width - 1) / 8); |
---|
2359 | node->image->pixels = (GLfloat*)gl2psMalloc(v + vtot); |
---|
2360 | node->image->pixels[0] = prim->verts[0].xyz[0]; |
---|
2361 | node->image->pixels[1] = prim->verts[0].xyz[1]; |
---|
2362 | |
---|
2363 | for(i = 0; i < vtot; i += sizeoffloat){ |
---|
2364 | current += 2; used -= 2; |
---|
2365 | if((vtot - i) >= 4) |
---|
2366 | memcpy(&(((char*)(node->image->pixels))[i + v]), &(current[2]), sizeoffloat); |
---|
2367 | else |
---|
2368 | memcpy(&(((char*)(node->image->pixels))[i + v]), &(current[2]), vtot - i); |
---|
2369 | } |
---|
2370 | current++; used--; |
---|
2371 | gl2psListAdd(gl2ps->primitives, &prim); |
---|
2372 | break; |
---|
2373 | case GL2PS_DRAW_PIXELS_TOKEN : |
---|
2374 | case GL2PS_TEXT_TOKEN : |
---|
2375 | if(auxindex < gl2psListNbr(gl2ps->auxprimitives)) |
---|
2376 | gl2psListAdd(gl2ps->primitives, |
---|
2377 | gl2psListPointer(gl2ps->auxprimitives, auxindex++)); |
---|
2378 | else |
---|
2379 | gl2psMsg(GL2PS_ERROR, "Wrong number of auxiliary tokens in buffer"); |
---|
2380 | break; |
---|
2381 | } |
---|
2382 | current += 2; |
---|
2383 | used -= 2; |
---|
2384 | break; |
---|
2385 | default : |
---|
2386 | gl2psMsg(GL2PS_WARNING, "Unknown token in buffer"); |
---|
2387 | current ++; |
---|
2388 | used --; |
---|
2389 | break; |
---|
2390 | } |
---|
2391 | } |
---|
2392 | |
---|
2393 | gl2psListReset(gl2ps->auxprimitives); |
---|
2394 | } |
---|
2395 | |
---|
2396 | /********************************************************************* |
---|
2397 | * |
---|
2398 | * PostScript routines |
---|
2399 | * |
---|
2400 | *********************************************************************/ |
---|
2401 | |
---|
2402 | static void gl2psWriteByte(unsigned char byte) |
---|
2403 | { |
---|
2404 | unsigned char h = byte / 16; |
---|
2405 | unsigned char l = byte % 16; |
---|
2406 | gl2psPrintf("%x%x", h, l); |
---|
2407 | } |
---|
2408 | |
---|
2409 | static void gl2psPrintPostScriptPixmap(GLfloat x, GLfloat y, GL2PSimage *im) |
---|
2410 | { |
---|
2411 | GLuint nbhex, nbyte, nrgb, nbits; |
---|
2412 | GLuint row, col, ibyte, icase; |
---|
2413 | GLfloat dr, dg, db, fgrey; |
---|
2414 | unsigned char red = 0, green = 0, blue = 0, b, grey; |
---|
2415 | GLuint width = (GLuint)im->width; |
---|
2416 | GLuint height = (GLuint)im->height; |
---|
2417 | |
---|
2418 | /* FIXME: should we define an option for these? Or just keep the |
---|
2419 | 8-bit per component case? */ |
---|
2420 | int greyscale = 0; /* set to 1 to output greyscale image */ |
---|
2421 | int nbit = 8; /* number of bits per color compoment (2, 4 or 8) */ |
---|
2422 | |
---|
2423 | if((width <= 0) || (height <= 0)) return; |
---|
2424 | |
---|
2425 | gl2psPrintf("gsave\n"); |
---|
2426 | gl2psPrintf("%.2f %.2f translate\n", x, y); |
---|
2427 | gl2psPrintf("%d %d scale\n", width, height); |
---|
2428 | |
---|
2429 | if(greyscale){ /* greyscale */ |
---|
2430 | gl2psPrintf("/picstr %d string def\n", width); |
---|
2431 | gl2psPrintf("%d %d %d\n", width, height, 8); |
---|
2432 | gl2psPrintf("[ %d 0 0 -%d 0 %d ]\n", width, height, height); |
---|
2433 | gl2psPrintf("{ currentfile picstr readhexstring pop }\n"); |
---|
2434 | gl2psPrintf("image\n"); |
---|
2435 | for(row = 0; row < height; row++){ |
---|
2436 | for(col = 0; col < width; col++){ |
---|
2437 | gl2psGetRGB(im, col, row, &dr, &dg, &db); |
---|
2438 | fgrey = (0.30F * dr + 0.59F * dg + 0.11F * db); |
---|
2439 | grey = (unsigned char)(255. * fgrey); |
---|
2440 | gl2psWriteByte(grey); |
---|
2441 | } |
---|
2442 | gl2psPrintf("\n"); |
---|
2443 | } |
---|
2444 | nbhex = width * height * 2; |
---|
2445 | gl2psPrintf("%%%% nbhex digit :%d\n", nbhex); |
---|
2446 | } |
---|
2447 | else if(nbit == 2){ /* color, 2 bits for r and g and b; rgbs following each other */ |
---|
2448 | nrgb = width * 3; |
---|
2449 | nbits = nrgb * nbit; |
---|
2450 | nbyte = nbits / 8; |
---|
2451 | if((nbyte * 8) != nbits) nbyte++; |
---|
2452 | gl2psPrintf("/rgbstr %d string def\n", nbyte); |
---|
2453 | gl2psPrintf("%d %d %d\n", width, height, nbit); |
---|
2454 | gl2psPrintf("[ %d 0 0 -%d 0 %d ]\n", width, height, height); |
---|
2455 | gl2psPrintf("{ currentfile rgbstr readhexstring pop }\n"); |
---|
2456 | gl2psPrintf("false 3\n"); |
---|
2457 | gl2psPrintf("colorimage\n"); |
---|
2458 | for(row = 0; row < height; row++){ |
---|
2459 | icase = 1; |
---|
2460 | col = 0; |
---|
2461 | b = 0; |
---|
2462 | for(ibyte = 0; ibyte < nbyte; ibyte++){ |
---|
2463 | if(icase == 1) { |
---|
2464 | if(col < width) { |
---|
2465 | gl2psGetRGB(im, col, row, &dr, &dg, &db); |
---|
2466 | } |
---|
2467 | else { |
---|
2468 | dr = dg = db = 0; |
---|
2469 | } |
---|
2470 | col++; |
---|
2471 | red = (unsigned char)(3. * dr); |
---|
2472 | green = (unsigned char)(3. * dg); |
---|
2473 | blue = (unsigned char)(3. * db); |
---|
2474 | b = red; |
---|
2475 | b = (b<<2) + green; |
---|
2476 | b = (b<<2) + blue; |
---|
2477 | if(col < width) { |
---|
2478 | gl2psGetRGB(im, col, row, &dr, &dg, &db); |
---|
2479 | } |
---|
2480 | else { |
---|
2481 | dr = dg = db = 0; |
---|
2482 | } |
---|
2483 | col++; |
---|
2484 | red = (unsigned char)(3. * dr); |
---|
2485 | green = (unsigned char)(3. * dg); |
---|
2486 | blue = (unsigned char)(3. * db); |
---|
2487 | b = (b<<2) + red; |
---|
2488 | gl2psWriteByte(b); |
---|
2489 | b = 0; |
---|
2490 | icase++; |
---|
2491 | } |
---|
2492 | else if(icase == 2) { |
---|
2493 | b = green; |
---|
2494 | b = (b<<2) + blue; |
---|
2495 | if(col < width) { |
---|
2496 | gl2psGetRGB(im, col, row, &dr, &dg, &db); |
---|
2497 | } |
---|
2498 | else { |
---|
2499 | dr = dg = db = 0; |
---|
2500 | } |
---|
2501 | col++; |
---|
2502 | red = (unsigned char)(3. * dr); |
---|
2503 | green = (unsigned char)(3. * dg); |
---|
2504 | blue = (unsigned char)(3. * db); |
---|
2505 | b = (b<<2) + red; |
---|
2506 | b = (b<<2) + green; |
---|
2507 | gl2psWriteByte(b); |
---|
2508 | b = 0; |
---|
2509 | icase++; |
---|
2510 | } |
---|
2511 | else if(icase == 3) { |
---|
2512 | b = blue; |
---|
2513 | if(col < width) { |
---|
2514 | gl2psGetRGB(im, col, row, &dr, &dg, &db); |
---|
2515 | } |
---|
2516 | else { |
---|
2517 | dr = dg = db = 0; |
---|
2518 | } |
---|
2519 | col++; |
---|
2520 | red = (unsigned char)(3. * dr); |
---|
2521 | green = (unsigned char)(3. * dg); |
---|
2522 | blue = (unsigned char)(3. * db); |
---|
2523 | b = (b<<2) + red; |
---|
2524 | b = (b<<2) + green; |
---|
2525 | b = (b<<2) + blue; |
---|
2526 | gl2psWriteByte(b); |
---|
2527 | b = 0; |
---|
2528 | icase = 1; |
---|
2529 | } |
---|
2530 | } |
---|
2531 | gl2psPrintf("\n"); |
---|
2532 | } |
---|
2533 | } |
---|
2534 | else if(nbit == 4){ /* color, 4 bits for r and g and b; rgbs following each other */ |
---|
2535 | nrgb = width * 3; |
---|
2536 | nbits = nrgb * nbit; |
---|
2537 | nbyte = nbits / 8; |
---|
2538 | if((nbyte * 8) != nbits) nbyte++; |
---|
2539 | gl2psPrintf("/rgbstr %d string def\n", nbyte); |
---|
2540 | gl2psPrintf("%d %d %d\n", width, height, nbit); |
---|
2541 | gl2psPrintf("[ %d 0 0 -%d 0 %d ]\n", width, height, height); |
---|
2542 | gl2psPrintf("{ currentfile rgbstr readhexstring pop }\n"); |
---|
2543 | gl2psPrintf("false 3\n"); |
---|
2544 | gl2psPrintf("colorimage\n"); |
---|
2545 | for(row = 0; row < height; row++){ |
---|
2546 | col = 0; |
---|
2547 | icase = 1; |
---|
2548 | for(ibyte = 0; ibyte < nbyte; ibyte++){ |
---|
2549 | if(icase == 1) { |
---|
2550 | if(col < width) { |
---|
2551 | gl2psGetRGB(im, col, row, &dr, &dg, &db); |
---|
2552 | } |
---|
2553 | else { |
---|
2554 | dr = dg = db = 0; |
---|
2555 | } |
---|
2556 | col++; |
---|
2557 | red = (unsigned char)(15. * dr); |
---|
2558 | green = (unsigned char)(15. * dg); |
---|
2559 | gl2psPrintf("%x%x", red, green); |
---|
2560 | icase++; |
---|
2561 | } |
---|
2562 | else if(icase == 2) { |
---|
2563 | blue = (unsigned char)(15. * db); |
---|
2564 | if(col < width) { |
---|
2565 | gl2psGetRGB(im, col, row, &dr, &dg, &db); |
---|
2566 | } |
---|
2567 | else { |
---|
2568 | dr = dg = db = 0; |
---|
2569 | } |
---|
2570 | col++; |
---|
2571 | red = (unsigned char)(15. * dr); |
---|
2572 | gl2psPrintf("%x%x", blue, red); |
---|
2573 | icase++; |
---|
2574 | } |
---|
2575 | else if(icase == 3) { |
---|
2576 | green = (unsigned char)(15. * dg); |
---|
2577 | blue = (unsigned char)(15. * db); |
---|
2578 | gl2psPrintf("%x%x", green, blue); |
---|
2579 | icase = 1; |
---|
2580 | } |
---|
2581 | } |
---|
2582 | gl2psPrintf("\n"); |
---|
2583 | } |
---|
2584 | } |
---|
2585 | else{ /* 8 bit for r and g and b */ |
---|
2586 | nbyte = width * 3; |
---|
2587 | gl2psPrintf("/rgbstr %d string def\n", nbyte); |
---|
2588 | gl2psPrintf("%d %d %d\n", width, height, 8); |
---|
2589 | gl2psPrintf("[ %d 0 0 -%d 0 %d ]\n", width, height, height); |
---|
2590 | gl2psPrintf("{ currentfile rgbstr readhexstring pop }\n"); |
---|
2591 | gl2psPrintf("false 3\n"); |
---|
2592 | gl2psPrintf("colorimage\n"); |
---|
2593 | for(row = 0; row < height; row++){ |
---|
2594 | for(col = 0; col < width; col++){ |
---|
2595 | gl2psGetRGB(im, col, row, &dr, &dg, &db); |
---|
2596 | red = (unsigned char)(255. * dr); |
---|
2597 | gl2psWriteByte(red); |
---|
2598 | green = (unsigned char)(255. * dg); |
---|
2599 | gl2psWriteByte(green); |
---|
2600 | blue = (unsigned char)(255. * db); |
---|
2601 | gl2psWriteByte(blue); |
---|
2602 | } |
---|
2603 | gl2psPrintf("\n"); |
---|
2604 | } |
---|
2605 | } |
---|
2606 | |
---|
2607 | gl2psPrintf("grestore\n"); |
---|
2608 | } |
---|
2609 | |
---|
2610 | static void gl2psPrintPostScriptImagemap(GLfloat x, GLfloat y, |
---|
2611 | GLsizei width, GLsizei height, |
---|
2612 | const unsigned char *imagemap){ |
---|
2613 | int i, size; |
---|
2614 | |
---|
2615 | if((width <= 0) || (height <= 0)) return; |
---|
2616 | |
---|
2617 | size = height + height * (width - 1) / 8; |
---|
2618 | |
---|
2619 | gl2psPrintf("gsave\n"); |
---|
2620 | gl2psPrintf("%.2f %.2f translate\n", x, y); |
---|
2621 | gl2psPrintf("%d %d scale\n%d %d\ntrue\n", width, height,width, height); |
---|
2622 | gl2psPrintf("[ %d 0 0 -%d 0 %d ] {<", width, height); |
---|
2623 | for(i = 0; i < size; i++){ |
---|
2624 | gl2psWriteByte(*imagemap); |
---|
2625 | imagemap++; |
---|
2626 | } |
---|
2627 | gl2psPrintf(">} imagemask\ngrestore\n"); |
---|
2628 | } |
---|
2629 | |
---|
2630 | static void gl2psPrintPostScriptHeader(void) |
---|
2631 | { |
---|
2632 | time_t now; |
---|
2633 | |
---|
2634 | /* Since compression is not part of the PostScript standard, |
---|
2635 | compressed PostScript files are just gzipped PostScript files |
---|
2636 | ("ps.gz" or "eps.gz") */ |
---|
2637 | gl2psPrintGzipHeader(); |
---|
2638 | |
---|
2639 | time(&now); |
---|
2640 | |
---|
2641 | if(gl2ps->format == GL2PS_PS){ |
---|
2642 | gl2psPrintf("%%!PS-Adobe-3.0\n"); |
---|
2643 | } |
---|
2644 | else{ |
---|
2645 | gl2psPrintf("%%!PS-Adobe-3.0 EPSF-3.0\n"); |
---|
2646 | } |
---|
2647 | |
---|
2648 | gl2psPrintf("%%%%Title: %s\n" |
---|
2649 | "%%%%Creator: GL2PS %d.%d.%d%s, %s\n" |
---|
2650 | "%%%%For: %s\n" |
---|
2651 | "%%%%CreationDate: %s" |
---|
2652 | "%%%%LanguageLevel: 3\n" |
---|
2653 | "%%%%DocumentData: Clean7Bit\n" |
---|
2654 | "%%%%Pages: 1\n", |
---|
2655 | gl2ps->title, GL2PS_MAJOR_VERSION, GL2PS_MINOR_VERSION, |
---|
2656 | GL2PS_PATCH_VERSION, GL2PS_EXTRA_VERSION, GL2PS_COPYRIGHT, |
---|
2657 | gl2ps->producer, ctime(&now)); |
---|
2658 | |
---|
2659 | if(gl2ps->format == GL2PS_PS){ |
---|
2660 | gl2psPrintf("%%%%Orientation: %s\n" |
---|
2661 | "%%%%DocumentMedia: Default %d %d 0 () ()\n", |
---|
2662 | (gl2ps->options & GL2PS_LANDSCAPE) ? "Landscape" : "Portrait", |
---|
2663 | (gl2ps->options & GL2PS_LANDSCAPE) ? (int)gl2ps->viewport[3] : |
---|
2664 | (int)gl2ps->viewport[2], |
---|
2665 | (gl2ps->options & GL2PS_LANDSCAPE) ? (int)gl2ps->viewport[2] : |
---|
2666 | (int)gl2ps->viewport[3]); |
---|
2667 | } |
---|
2668 | |
---|
2669 | gl2psPrintf("%%%%BoundingBox: %d %d %d %d\n" |
---|
2670 | "%%%%EndComments\n", |
---|
2671 | (gl2ps->options & GL2PS_LANDSCAPE) ? (int)gl2ps->viewport[1] : |
---|
2672 | (int)gl2ps->viewport[0], |
---|
2673 | (gl2ps->options & GL2PS_LANDSCAPE) ? (int)gl2ps->viewport[0] : |
---|
2674 | (int)gl2ps->viewport[1], |
---|
2675 | (gl2ps->options & GL2PS_LANDSCAPE) ? (int)gl2ps->viewport[3] : |
---|
2676 | (int)gl2ps->viewport[2], |
---|
2677 | (gl2ps->options & GL2PS_LANDSCAPE) ? (int)gl2ps->viewport[2] : |
---|
2678 | (int)gl2ps->viewport[3]); |
---|
2679 | |
---|
2680 | /* RGB color: r g b C (replace C by G in output to change from rgb to gray) |
---|
2681 | Grayscale: r g b G |
---|
2682 | Font choose: size fontname FC |
---|
2683 | Text string: (string) x y size fontname S?? |
---|
2684 | Rotated text string: (string) angle x y size fontname S??R |
---|
2685 | Point primitive: x y size P |
---|
2686 | Line width: width W |
---|
2687 | Line start: x y LS |
---|
2688 | Line joining last point: x y L |
---|
2689 | Line end: x y LE |
---|
2690 | Flat-shaded triangle: x3 y3 x2 y2 x1 y1 T |
---|
2691 | Smooth-shaded triangle: x3 y3 r3 g3 b3 x2 y2 r2 g2 b2 x1 y1 r1 g1 b1 ST */ |
---|
2692 | |
---|
2693 | gl2psPrintf("%%%%BeginProlog\n" |
---|
2694 | "/gl2psdict 64 dict def gl2psdict begin\n" |
---|
2695 | "0 setlinecap 0 setlinejoin\n" |
---|
2696 | "/tryPS3shading %s def %% set to false to force subdivision\n" |
---|
2697 | "/rThreshold %g def %% red component subdivision threshold\n" |
---|
2698 | "/gThreshold %g def %% green component subdivision threshold\n" |
---|
2699 | "/bThreshold %g def %% blue component subdivision threshold\n", |
---|
2700 | (gl2ps->options & GL2PS_NO_PS3_SHADING) ? "false" : "true", |
---|
2701 | gl2ps->threshold[0], gl2ps->threshold[1], gl2ps->threshold[2]); |
---|
2702 | |
---|
2703 | gl2psPrintf("/BD { bind def } bind def\n" |
---|
2704 | "/C { setrgbcolor } BD\n" |
---|
2705 | "/G { 0.082 mul exch 0.6094 mul add exch 0.3086 mul add neg 1.0 add setgray } BD\n" |
---|
2706 | "/W { setlinewidth } BD\n"); |
---|
2707 | |
---|
2708 | gl2psPrintf("/FC { findfont exch /SH exch def SH scalefont setfont } BD\n" |
---|
2709 | "/SW { dup stringwidth pop } BD\n" |
---|
2710 | "/S { FC moveto show } BD\n" |
---|
2711 | "/SBC{ FC moveto SW -2 div 0 rmoveto show } BD\n" |
---|
2712 | "/SBR{ FC moveto SW neg 0 rmoveto show } BD\n" |
---|
2713 | "/SCL{ FC moveto 0 SH -2 div rmoveto show } BD\n" |
---|
2714 | "/SCC{ FC moveto SW -2 div SH -2 div rmoveto show } BD\n" |
---|
2715 | "/SCR{ FC moveto SW neg SH -2 div rmoveto show } BD\n" |
---|
2716 | "/STL{ FC moveto 0 SH neg rmoveto show } BD\n" |
---|
2717 | "/STC{ FC moveto SW -2 div SH neg rmoveto show } BD\n" |
---|
2718 | "/STR{ FC moveto SW neg SH neg rmoveto show } BD\n"); |
---|
2719 | |
---|
2720 | /* rotated text routines: same nameanem with R appended */ |
---|
2721 | |
---|
2722 | gl2psPrintf("/FCT { FC translate 0 0 } BD\n" |
---|
2723 | "/SR { gsave FCT moveto rotate show grestore } BD\n" |
---|
2724 | "/SBCR{ gsave FCT moveto rotate SW -2 div 0 rmoveto show grestore } BD\n" |
---|
2725 | "/SBRR{ gsave FCT moveto rotate SW neg 0 rmoveto show grestore } BD\n" |
---|
2726 | "/SCLR{ gsave FCT moveto rotate 0 SH -2 div rmoveto show grestore} BD\n"); |
---|
2727 | gl2psPrintf("/SCCR{ gsave FCT moveto rotate SW -2 div SH -2 div rmoveto show grestore} BD\n" |
---|
2728 | "/SCRR{ gsave FCT moveto rotate SW neg SH -2 div rmoveto show grestore} BD\n" |
---|
2729 | "/STLR{ gsave FCT moveto rotate 0 SH neg rmoveto show grestore } BD\n" |
---|
2730 | "/STCR{ gsave FCT moveto rotate SW -2 div SH neg rmoveto show grestore } BD\n" |
---|
2731 | "/STRR{ gsave FCT moveto rotate SW neg SH neg rmoveto show grestore } BD\n"); |
---|
2732 | |
---|
2733 | gl2psPrintf("/P { newpath 0.0 360.0 arc closepath fill } BD\n" |
---|
2734 | "/LS { newpath moveto } BD\n" |
---|
2735 | "/L { lineto } BD\n" |
---|
2736 | "/LE { lineto stroke } BD\n" |
---|
2737 | "/T { newpath moveto lineto lineto closepath fill } BD\n"); |
---|
2738 | |
---|
2739 | /* Smooth-shaded triangle with PostScript level 3 shfill operator: |
---|
2740 | x3 y3 r3 g3 b3 x2 y2 r2 g2 b2 x1 y1 r1 g1 b1 STshfill */ |
---|
2741 | |
---|
2742 | gl2psPrintf("/STshfill {\n" |
---|
2743 | " /b1 exch def /g1 exch def /r1 exch def /y1 exch def /x1 exch def\n" |
---|
2744 | " /b2 exch def /g2 exch def /r2 exch def /y2 exch def /x2 exch def\n" |
---|
2745 | " /b3 exch def /g3 exch def /r3 exch def /y3 exch def /x3 exch def\n" |
---|
2746 | " gsave << /ShadingType 4 /ColorSpace [/DeviceRGB]\n" |
---|
2747 | " /DataSource [ 0 x1 y1 r1 g1 b1 0 x2 y2 r2 g2 b2 0 x3 y3 r3 g3 b3 ] >>\n" |
---|
2748 | " shfill grestore } BD\n"); |
---|
2749 | |
---|
2750 | /* Flat-shaded triangle with middle color: |
---|
2751 | x3 y3 r3 g3 b3 x2 y2 r2 g2 b2 x1 y1 r1 g1 b1 Tm */ |
---|
2752 | |
---|
2753 | gl2psPrintf(/* stack : x3 y3 r3 g3 b3 x2 y2 r2 g2 b2 x1 y1 r1 g1 b1 */ |
---|
2754 | "/Tm { 3 -1 roll 8 -1 roll 13 -1 roll add add 3 div\n" /* r = (r1+r2+r3)/3 */ |
---|
2755 | /* stack : x3 y3 g3 b3 x2 y2 g2 b2 x1 y1 g1 b1 r */ |
---|
2756 | " 3 -1 roll 7 -1 roll 11 -1 roll add add 3 div\n" /* g = (g1+g2+g3)/3 */ |
---|
2757 | /* stack : x3 y3 b3 x2 y2 b2 x1 y1 b1 r g b */ |
---|
2758 | " 3 -1 roll 6 -1 roll 9 -1 roll add add 3 div" /* b = (b1+b2+b3)/3 */ |
---|
2759 | /* stack : x3 y3 x2 y2 x1 y1 r g b */ |
---|
2760 | " C T } BD\n"); |
---|
2761 | |
---|
2762 | /* Split triangle in four sub-triangles (at sides middle points) and call the |
---|
2763 | STnoshfill procedure on each, interpolating the colors in RGB space: |
---|
2764 | x3 y3 r3 g3 b3 x2 y2 r2 g2 b2 x1 y1 r1 g1 b1 STsplit |
---|
2765 | (in procedure comments key: (Vi) = xi yi ri gi bi) */ |
---|
2766 | |
---|
2767 | gl2psPrintf("/STsplit {\n" |
---|
2768 | " 4 index 15 index add 0.5 mul\n" /* x13 = (x1+x3)/2 */ |
---|
2769 | " 4 index 15 index add 0.5 mul\n" /* y13 = (y1+y3)/2 */ |
---|
2770 | " 4 index 15 index add 0.5 mul\n" /* r13 = (r1+r3)/2 */ |
---|
2771 | " 4 index 15 index add 0.5 mul\n" /* g13 = (g1+g3)/2 */ |
---|
2772 | " 4 index 15 index add 0.5 mul\n" /* b13 = (b1+b3)/2 */ |
---|
2773 | " 5 copy 5 copy 25 15 roll\n"); |
---|
2774 | |
---|
2775 | /* at his point, stack = (V3) (V13) (V13) (V13) (V2) (V1) */ |
---|
2776 | |
---|
2777 | gl2psPrintf(" 9 index 30 index add 0.5 mul\n" /* x23 = (x2+x3)/2 */ |
---|
2778 | " 9 index 30 index add 0.5 mul\n" /* y23 = (y2+y3)/2 */ |
---|
2779 | " 9 index 30 index add 0.5 mul\n" /* r23 = (r2+r3)/2 */ |
---|
2780 | " 9 index 30 index add 0.5 mul\n" /* g23 = (g2+g3)/2 */ |
---|
2781 | " 9 index 30 index add 0.5 mul\n" /* b23 = (b2+b3)/2 */ |
---|
2782 | " 5 copy 5 copy 35 5 roll 25 5 roll 15 5 roll\n"); |
---|
2783 | |
---|
2784 | /* stack = (V3) (V13) (V23) (V13) (V23) (V13) (V23) (V2) (V1) */ |
---|
2785 | |
---|
2786 | gl2psPrintf(" 4 index 10 index add 0.5 mul\n" /* x12 = (x1+x2)/2 */ |
---|
2787 | " 4 index 10 index add 0.5 mul\n" /* y12 = (y1+y2)/2 */ |
---|
2788 | " 4 index 10 index add 0.5 mul\n" /* r12 = (r1+r2)/2 */ |
---|
2789 | " 4 index 10 index add 0.5 mul\n" /* g12 = (g1+g2)/2 */ |
---|
2790 | " 4 index 10 index add 0.5 mul\n" /* b12 = (b1+b2)/2 */ |
---|
2791 | " 5 copy 5 copy 40 5 roll 25 5 roll 15 5 roll 25 5 roll\n"); |
---|
2792 | |
---|
2793 | /* stack = (V3) (V13) (V23) (V13) (V12) (V23) (V13) (V1) (V12) (V23) (V12) (V2) */ |
---|
2794 | |
---|
2795 | gl2psPrintf(" STnoshfill STnoshfill STnoshfill STnoshfill } BD\n"); |
---|
2796 | |
---|
2797 | /* Gouraud shaded triangle using recursive subdivision until the difference |
---|
2798 | between corner colors does not exceed the thresholds: |
---|
2799 | x3 y3 r3 g3 b3 x2 y2 r2 g2 b2 x1 y1 r1 g1 b1 STnoshfill */ |
---|
2800 | |
---|
2801 | gl2psPrintf("/STnoshfill {\n" |
---|
2802 | " 2 index 8 index sub abs rThreshold gt\n" /* |r1-r2|>rth */ |
---|
2803 | " { STsplit }\n" |
---|
2804 | " { 1 index 7 index sub abs gThreshold gt\n" /* |g1-g2|>gth */ |
---|
2805 | " { STsplit }\n" |
---|
2806 | " { dup 6 index sub abs bThreshold gt\n" /* |b1-b2|>bth */ |
---|
2807 | " { STsplit }\n" |
---|
2808 | " { 2 index 13 index sub abs rThreshold gt\n" /* |r1-r3|>rht */ |
---|
2809 | " { STsplit }\n" |
---|
2810 | " { 1 index 12 index sub abs gThreshold gt\n" /* |g1-g3|>gth */ |
---|
2811 | " { STsplit }\n" |
---|
2812 | " { dup 11 index sub abs bThreshold gt\n" /* |b1-b3|>bth */ |
---|
2813 | " { STsplit }\n" |
---|
2814 | " { 7 index 13 index sub abs rThreshold gt\n"); /* |r2-r3|>rht */ |
---|
2815 | gl2psPrintf(" { STsplit }\n" |
---|
2816 | " { 6 index 12 index sub abs gThreshold gt\n" /* |g2-g3|>gth */ |
---|
2817 | " { STsplit }\n" |
---|
2818 | " { 5 index 11 index sub abs bThreshold gt\n" /* |b2-b3|>bth */ |
---|
2819 | " { STsplit }\n" |
---|
2820 | " { Tm }\n" /* all colors sufficiently similar */ |
---|
2821 | " ifelse }\n" |
---|
2822 | " ifelse }\n" |
---|
2823 | " ifelse }\n" |
---|
2824 | " ifelse }\n" |
---|
2825 | " ifelse }\n" |
---|
2826 | " ifelse }\n" |
---|
2827 | " ifelse }\n" |
---|
2828 | " ifelse }\n" |
---|
2829 | " ifelse } BD\n"); |
---|
2830 | |
---|
2831 | gl2psPrintf("tryPS3shading\n" |
---|
2832 | "{ /shfill where\n" |
---|
2833 | " { /ST { STshfill } BD }\n" |
---|
2834 | " { /ST { STnoshfill } BD }\n" |
---|
2835 | " ifelse }\n" |
---|
2836 | "{ /ST { STnoshfill } BD }\n" |
---|
2837 | "ifelse\n"); |
---|
2838 | |
---|
2839 | gl2psPrintf("end\n" |
---|
2840 | "%%%%EndProlog\n" |
---|
2841 | "%%%%BeginSetup\n" |
---|
2842 | "/DeviceRGB setcolorspace\n" |
---|
2843 | "gl2psdict begin\n" |
---|
2844 | "%%%%EndSetup\n" |
---|
2845 | "%%%%Page: 1 1\n" |
---|
2846 | "%%%%BeginPageSetup\n"); |
---|
2847 | |
---|
2848 | if(gl2ps->options & GL2PS_LANDSCAPE){ |
---|
2849 | gl2psPrintf("%d 0 translate 90 rotate\n", |
---|
2850 | (int)gl2ps->viewport[3]); |
---|
2851 | } |
---|
2852 | |
---|
2853 | gl2psPrintf("%%%%EndPageSetup\n" |
---|
2854 | "mark\n" |
---|
2855 | "gsave\n" |
---|
2856 | "1.0 1.0 scale\n"); |
---|
2857 | |
---|
2858 | if(gl2ps->options & GL2PS_DRAW_BACKGROUND){ |
---|
2859 | gl2psPrintf("%g %g %g C\n" |
---|
2860 | "newpath %d %d moveto %d %d lineto %d %d lineto %d %d lineto\n" |
---|
2861 | "closepath fill\n", |
---|
2862 | gl2ps->bgcolor[0], gl2ps->bgcolor[1], gl2ps->bgcolor[2], |
---|
2863 | (int)gl2ps->viewport[0], (int)gl2ps->viewport[1], (int)gl2ps->viewport[2], |
---|
2864 | (int)gl2ps->viewport[1], (int)gl2ps->viewport[2], (int)gl2ps->viewport[3], |
---|
2865 | (int)gl2ps->viewport[0], (int)gl2ps->viewport[3]); |
---|
2866 | } |
---|
2867 | } |
---|
2868 | |
---|
2869 | static void gl2psPrintPostScriptColor(GL2PSrgba rgba) |
---|
2870 | { |
---|
2871 | if(!gl2psSameColor(gl2ps->lastrgba, rgba)){ |
---|
2872 | gl2psSetLastColor(rgba); |
---|
2873 | gl2psPrintf("%g %g %g C\n", rgba[0], rgba[1], rgba[2]); |
---|
2874 | } |
---|
2875 | } |
---|
2876 | |
---|
2877 | static void gl2psResetPostScriptColor(void) |
---|
2878 | { |
---|
2879 | gl2ps->lastrgba[0] = gl2ps->lastrgba[1] = gl2ps->lastrgba[2] = -1.; |
---|
2880 | } |
---|
2881 | |
---|
2882 | static void gl2psEndPostScriptLine(void) |
---|
2883 | { |
---|
2884 | int i; |
---|
2885 | if(gl2ps->lastvertex.rgba[0] >= 0.){ |
---|
2886 | gl2psPrintf("%g %g LE\n", gl2ps->lastvertex.xyz[0], gl2ps->lastvertex.xyz[1]); |
---|
2887 | for(i = 0; i < 3; i++) |
---|
2888 | gl2ps->lastvertex.xyz[i] = -1.; |
---|
2889 | for(i = 0; i < 4; i++) |
---|
2890 | gl2ps->lastvertex.rgba[i] = -1.; |
---|
2891 | } |
---|
2892 | } |
---|
2893 | |
---|
2894 | static void gl2psParseStipplePattern(GLushort pattern, GLint factor, |
---|
2895 | int *nb, int array[10]) |
---|
2896 | { |
---|
2897 | int i, n; |
---|
2898 | int on[8] = {0, 0, 0, 0, 0, 0, 0, 0}; |
---|
2899 | int off[8] = {0, 0, 0, 0, 0, 0, 0, 0}; |
---|
2900 | char tmp[16]; |
---|
2901 | |
---|
2902 | /* extract the 16 bits from the OpenGL stipple pattern */ |
---|
2903 | for(n = 15; n >= 0; n--){ |
---|
2904 | tmp[n] = (char)(pattern & 0x01); |
---|
2905 | pattern >>= 1; |
---|
2906 | } |
---|
2907 | /* compute the on/off pixel sequence */ |
---|
2908 | n = 0; |
---|
2909 | for(i = 0; i < 8; i++){ |
---|
2910 | while(n < 16 && !tmp[n]){ off[i]++; n++; } |
---|
2911 | while(n < 16 && tmp[n]){ on[i]++; n++; } |
---|
2912 | if(n >= 15){ i++; break; } |
---|
2913 | } |
---|
2914 | |
---|
2915 | /* store the on/off array from right to left, starting with off |
---|
2916 | pixels. The PostScript specification allows for at most 11 |
---|
2917 | elements in the on/off array, so we limit ourselves to 5 on/off |
---|
2918 | couples (our longest possible array is thus [on4 off4 on3 off3 |
---|
2919 | on2 off2 on1 off1 on0 off0]) */ |
---|
2920 | *nb = 0; |
---|
2921 | for(n = i - 1; n >= 0; n--){ |
---|
2922 | array[(*nb)++] = factor * on[n]; |
---|
2923 | array[(*nb)++] = factor * off[n]; |
---|
2924 | if(*nb == 10) break; |
---|
2925 | } |
---|
2926 | } |
---|
2927 | |
---|
2928 | static int gl2psPrintPostScriptDash(GLushort pattern, GLint factor, const char *str) |
---|
2929 | { |
---|
2930 | int len = 0, i, n, array[10]; |
---|
2931 | |
---|
2932 | if(pattern == gl2ps->lastpattern && factor == gl2ps->lastfactor) |
---|
2933 | return 0; |
---|
2934 | |
---|
2935 | gl2ps->lastpattern = pattern; |
---|
2936 | gl2ps->lastfactor = factor; |
---|
2937 | |
---|
2938 | if(!pattern || !factor){ |
---|
2939 | /* solid line */ |
---|
2940 | len += gl2psPrintf("[] 0 %s\n", str); |
---|
2941 | } |
---|
2942 | else{ |
---|
2943 | gl2psParseStipplePattern(pattern, factor, &n, array); |
---|
2944 | len += gl2psPrintf("["); |
---|
2945 | for(i = 0; i < n; i++){ |
---|
2946 | if(i) len += gl2psPrintf(" "); |
---|
2947 | len += gl2psPrintf("%d", array[i]); |
---|
2948 | } |
---|
2949 | len += gl2psPrintf("] 0 %s\n", str); |
---|
2950 | } |
---|
2951 | |
---|
2952 | return len; |
---|
2953 | } |
---|
2954 | |
---|
2955 | static void gl2psPrintPostScriptPrimitive(void *data) |
---|
2956 | { |
---|
2957 | int newline; |
---|
2958 | GL2PSprimitive *prim; |
---|
2959 | |
---|
2960 | prim = *(GL2PSprimitive**)data; |
---|
2961 | |
---|
2962 | if((gl2ps->options & GL2PS_OCCLUSION_CULL) && prim->culled) return; |
---|
2963 | |
---|
2964 | /* Every effort is made to draw lines as connected segments (i.e., |
---|
2965 | using a single PostScript path): this is the only way to get nice |
---|
2966 | line joins and to not restart the stippling for every line |
---|
2967 | segment. So if the primitive to print is not a line we must first |
---|
2968 | finish the current line (if any): */ |
---|
2969 | if(prim->type != GL2PS_LINE) gl2psEndPostScriptLine(); |
---|
2970 | |
---|
2971 | switch(prim->type){ |
---|
2972 | case GL2PS_POINT : |
---|
2973 | gl2psPrintPostScriptColor(prim->verts[0].rgba); |
---|
2974 | gl2psPrintf("%g %g %g P\n", |
---|
2975 | prim->verts[0].xyz[0], prim->verts[0].xyz[1], 0.5 * prim->width); |
---|
2976 | break; |
---|
2977 | case GL2PS_LINE : |
---|
2978 | if(!gl2psSamePosition(gl2ps->lastvertex.xyz, prim->verts[0].xyz) || |
---|
2979 | !gl2psSameColor(gl2ps->lastrgba, prim->verts[0].rgba) || |
---|
2980 | gl2ps->lastlinewidth != prim->width || |
---|
2981 | gl2ps->lastpattern != prim->pattern || |
---|
2982 | gl2ps->lastfactor != prim->factor){ |
---|
2983 | /* End the current line if the new segment does not start where |
---|
2984 | the last one ended, or if the color, the width or the |
---|
2985 | stippling have changed (multi-stroking lines with changing |
---|
2986 | colors is necessary until we use /shfill for lines; |
---|
2987 | unfortunately this means that at the moment we can screw up |
---|
2988 | line stippling for smooth-shaded lines) */ |
---|
2989 | gl2psEndPostScriptLine(); |
---|
2990 | newline = 1; |
---|
2991 | } |
---|
2992 | else{ |
---|
2993 | newline = 0; |
---|
2994 | } |
---|
2995 | if(gl2ps->lastlinewidth != prim->width){ |
---|
2996 | gl2ps->lastlinewidth = prim->width; |
---|
2997 | gl2psPrintf("%g W\n", gl2ps->lastlinewidth); |
---|
2998 | } |
---|
2999 | gl2psPrintPostScriptDash(prim->pattern, prim->factor, "setdash"); |
---|
3000 | gl2psPrintPostScriptColor(prim->verts[0].rgba); |
---|
3001 | gl2psPrintf("%g %g %s\n", prim->verts[0].xyz[0], prim->verts[0].xyz[1], |
---|
3002 | newline ? "LS" : "L"); |
---|
3003 | gl2ps->lastvertex = prim->verts[1]; |
---|
3004 | break; |
---|
3005 | case GL2PS_TRIANGLE : |
---|
3006 | if(!gl2psVertsSameColor(prim)){ |
---|
3007 | gl2psResetPostScriptColor(); |
---|
3008 | gl2psPrintf("%g %g %g %g %g %g %g %g %g %g %g %g %g %g %g ST\n", |
---|
3009 | prim->verts[2].xyz[0], prim->verts[2].xyz[1], |
---|
3010 | prim->verts[2].rgba[0], prim->verts[2].rgba[1], |
---|
3011 | prim->verts[2].rgba[2], prim->verts[1].xyz[0], |
---|
3012 | prim->verts[1].xyz[1], prim->verts[1].rgba[0], |
---|
3013 | prim->verts[1].rgba[1], prim->verts[1].rgba[2], |
---|
3014 | prim->verts[0].xyz[0], prim->verts[0].xyz[1], |
---|
3015 | prim->verts[0].rgba[0], prim->verts[0].rgba[1], |
---|
3016 | prim->verts[0].rgba[2]); |
---|
3017 | } |
---|
3018 | else{ |
---|
3019 | gl2psPrintPostScriptColor(prim->verts[0].rgba); |
---|
3020 | gl2psPrintf("%g %g %g %g %g %g T\n", |
---|
3021 | prim->verts[2].xyz[0], prim->verts[2].xyz[1], |
---|
3022 | prim->verts[1].xyz[0], prim->verts[1].xyz[1], |
---|
3023 | prim->verts[0].xyz[0], prim->verts[0].xyz[1]); |
---|
3024 | } |
---|
3025 | break; |
---|
3026 | case GL2PS_QUADRANGLE : |
---|
3027 | gl2psMsg(GL2PS_WARNING, "There should not be any quad left to print"); |
---|
3028 | break; |
---|
3029 | case GL2PS_PIXMAP : |
---|
3030 | gl2psPrintPostScriptPixmap(prim->verts[0].xyz[0], prim->verts[0].xyz[1], |
---|
3031 | prim->data.image); |
---|
3032 | break; |
---|
3033 | case GL2PS_IMAGEMAP : |
---|
3034 | if(prim->data.image->type != GL2PS_IMAGEMAP_WRITTEN){ |
---|
3035 | gl2psPrintPostScriptColor(prim->verts[0].rgba); |
---|
3036 | gl2psPrintPostScriptImagemap(prim->data.image->pixels[0], |
---|
3037 | prim->data.image->pixels[1], |
---|
3038 | prim->data.image->width, prim->data.image->height, |
---|
3039 | (const unsigned char*)(&(prim->data.image->pixels[2]))); |
---|
3040 | prim->data.image->type = GL2PS_IMAGEMAP_WRITTEN; |
---|
3041 | } |
---|
3042 | break; |
---|
3043 | case GL2PS_TEXT : |
---|
3044 | gl2psPrintPostScriptColor(prim->verts[0].rgba); |
---|
3045 | gl2psPrintf("(%s) ", prim->data.text->str); |
---|
3046 | if(prim->data.text->angle) |
---|
3047 | gl2psPrintf("%g ", prim->data.text->angle); |
---|
3048 | gl2psPrintf("%g %g %d /%s ", |
---|
3049 | prim->verts[0].xyz[0], prim->verts[0].xyz[1], |
---|
3050 | prim->data.text->fontsize, prim->data.text->fontname); |
---|
3051 | switch(prim->data.text->alignment){ |
---|
3052 | case GL2PS_TEXT_C: |
---|
3053 | gl2psPrintf(prim->data.text->angle ? "SCCR\n" : "SCC\n"); |
---|
3054 | break; |
---|
3055 | case GL2PS_TEXT_CL: |
---|
3056 | gl2psPrintf(prim->data.text->angle ? "SCLR\n" : "SCL\n"); |
---|
3057 | break; |
---|
3058 | case GL2PS_TEXT_CR: |
---|
3059 | gl2psPrintf(prim->data.text->angle ? "SCRR\n" : "SCR\n"); |
---|
3060 | break; |
---|
3061 | case GL2PS_TEXT_B: |
---|
3062 | gl2psPrintf(prim->data.text->angle ? "SBCR\n" : "SBC\n"); |
---|
3063 | break; |
---|
3064 | case GL2PS_TEXT_BR: |
---|
3065 | gl2psPrintf(prim->data.text->angle ? "SBRR\n" : "SBR\n"); |
---|
3066 | break; |
---|
3067 | case GL2PS_TEXT_T: |
---|
3068 | gl2psPrintf(prim->data.text->angle ? "STCR\n" : "STC\n"); |
---|
3069 | break; |
---|
3070 | case GL2PS_TEXT_TL: |
---|
3071 | gl2psPrintf(prim->data.text->angle ? "STLR\n" : "STL\n"); |
---|
3072 | break; |
---|
3073 | case GL2PS_TEXT_TR: |
---|
3074 | gl2psPrintf(prim->data.text->angle ? "STRR\n" : "STR\n"); |
---|
3075 | break; |
---|
3076 | case GL2PS_TEXT_BL: |
---|
3077 | default: |
---|
3078 | gl2psPrintf(prim->data.text->angle ? "SR\n" : "S\n"); |
---|
3079 | break; |
---|
3080 | } |
---|
3081 | break; |
---|
3082 | case GL2PS_SPECIAL : |
---|
3083 | /* alignment contains the format for which the special output text |
---|
3084 | is intended */ |
---|
3085 | if(prim->data.text->alignment == GL2PS_PS || |
---|
3086 | prim->data.text->alignment == GL2PS_EPS) |
---|
3087 | gl2psPrintf("%s\n", prim->data.text->str); |
---|
3088 | break; |
---|
3089 | default : |
---|
3090 | break; |
---|
3091 | } |
---|
3092 | } |
---|
3093 | |
---|
3094 | static void gl2psPrintPostScriptFooter(void) |
---|
3095 | { |
---|
3096 | gl2psPrintf("grestore\n" |
---|
3097 | "showpage\n" |
---|
3098 | "cleartomark\n" |
---|
3099 | "%%%%PageTrailer\n" |
---|
3100 | "%%%%Trailer\n" |
---|
3101 | "end\n" |
---|
3102 | "%%%%EOF\n"); |
---|
3103 | |
---|
3104 | gl2psPrintGzipFooter(); |
---|
3105 | } |
---|
3106 | |
---|
3107 | static void gl2psPrintPostScriptBeginViewport(GLint viewport[4]) |
---|
3108 | { |
---|
3109 | GLint index; |
---|
3110 | GLfloat rgba[4]; |
---|
3111 | int x = viewport[0], y = viewport[1], w = viewport[2], h = viewport[3]; |
---|
3112 | |
---|
3113 | glRenderMode(GL_FEEDBACK); |
---|
3114 | |
---|
3115 | if(gl2ps->header){ |
---|
3116 | gl2psPrintPostScriptHeader(); |
---|
3117 | gl2ps->header = GL_FALSE; |
---|
3118 | } |
---|
3119 | |
---|
3120 | gl2psPrintf("gsave\n" |
---|
3121 | "1.0 1.0 scale\n"); |
---|
3122 | |
---|
3123 | if(gl2ps->options & GL2PS_DRAW_BACKGROUND){ |
---|
3124 | if(gl2ps->colormode == GL_RGBA || gl2ps->colorsize == 0){ |
---|
3125 | glGetFloatv(GL_COLOR_CLEAR_VALUE, rgba); |
---|
3126 | } |
---|
3127 | else{ |
---|
3128 | glGetIntegerv(GL_INDEX_CLEAR_VALUE, &index); |
---|
3129 | rgba[0] = gl2ps->colormap[index][0]; |
---|
3130 | rgba[1] = gl2ps->colormap[index][1]; |
---|
3131 | rgba[2] = gl2ps->colormap[index][2]; |
---|
3132 | rgba[3] = 1.0F; |
---|
3133 | } |
---|
3134 | gl2psPrintf("%g %g %g C\n" |
---|
3135 | "newpath %d %d moveto %d %d lineto %d %d lineto %d %d lineto\n" |
---|
3136 | "closepath fill\n", |
---|
3137 | rgba[0], rgba[1], rgba[2], |
---|
3138 | x, y, x+w, y, x+w, y+h, x, y+h); |
---|
3139 | } |
---|
3140 | |
---|
3141 | gl2psPrintf("newpath %d %d moveto %d %d lineto %d %d lineto %d %d lineto\n" |
---|
3142 | "closepath clip\n", |
---|
3143 | x, y, x+w, y, x+w, y+h, x, y+h); |
---|
3144 | |
---|
3145 | } |
---|
3146 | |
---|
3147 | static GLint gl2psPrintPostScriptEndViewport(void) |
---|
3148 | { |
---|
3149 | GLint res; |
---|
3150 | |
---|
3151 | res = gl2psPrintPrimitives(); |
---|
3152 | gl2psPrintf("grestore\n"); |
---|
3153 | return res; |
---|
3154 | } |
---|
3155 | |
---|
3156 | static void gl2psPrintPostScriptFinalPrimitive(void) |
---|
3157 | { |
---|
3158 | /* End any remaining line, if any */ |
---|
3159 | gl2psEndPostScriptLine(); |
---|
3160 | } |
---|
3161 | |
---|
3162 | /* definition of the PostScript and Encapsulated PostScript backends */ |
---|
3163 | |
---|
3164 | static GL2PSbackend gl2psPS = { |
---|
3165 | gl2psPrintPostScriptHeader, |
---|
3166 | gl2psPrintPostScriptFooter, |
---|
3167 | gl2psPrintPostScriptBeginViewport, |
---|
3168 | gl2psPrintPostScriptEndViewport, |
---|
3169 | gl2psPrintPostScriptPrimitive, |
---|
3170 | gl2psPrintPostScriptFinalPrimitive, |
---|
3171 | "ps", |
---|
3172 | "Postscript" |
---|
3173 | }; |
---|
3174 | |
---|
3175 | static GL2PSbackend gl2psEPS = { |
---|
3176 | gl2psPrintPostScriptHeader, |
---|
3177 | gl2psPrintPostScriptFooter, |
---|
3178 | gl2psPrintPostScriptBeginViewport, |
---|
3179 | gl2psPrintPostScriptEndViewport, |
---|
3180 | gl2psPrintPostScriptPrimitive, |
---|
3181 | gl2psPrintPostScriptFinalPrimitive, |
---|
3182 | "eps", |
---|
3183 | "Encapsulated Postscript" |
---|
3184 | }; |
---|
3185 | |
---|
3186 | /********************************************************************* |
---|
3187 | * |
---|
3188 | * LaTeX routines |
---|
3189 | * |
---|
3190 | *********************************************************************/ |
---|
3191 | |
---|
3192 | static void gl2psPrintTeXHeader(void) |
---|
3193 | { |
---|
3194 | char name[256]; |
---|
3195 | time_t now; |
---|
3196 | int i; |
---|
3197 | |
---|
3198 | if(gl2ps->filename && strlen(gl2ps->filename) < 256){ |
---|
3199 | for(i = strlen(gl2ps->filename)-1; i >= 0; i--){ |
---|
3200 | if(gl2ps->filename[i] == '.'){ |
---|
3201 | strncpy(name, gl2ps->filename, i); |
---|
3202 | name[i] = '\0'; |
---|
3203 | break; |
---|
3204 | } |
---|
3205 | } |
---|
3206 | if(i <= 0) strcpy(name, gl2ps->filename); |
---|
3207 | } |
---|
3208 | else{ |
---|
3209 | strcpy(name, "untitled"); |
---|
3210 | } |
---|
3211 | |
---|
3212 | time(&now); |
---|
3213 | |
---|
3214 | fprintf(gl2ps->stream, |
---|
3215 | "%% Title: %s\n" |
---|
3216 | "%% Creator: GL2PS %d.%d.%d%s, %s\n" |
---|
3217 | "%% For: %s\n" |
---|
3218 | "%% CreationDate: %s", |
---|
3219 | gl2ps->title, GL2PS_MAJOR_VERSION, GL2PS_MINOR_VERSION, |
---|
3220 | GL2PS_PATCH_VERSION, GL2PS_EXTRA_VERSION, GL2PS_COPYRIGHT, |
---|
3221 | gl2ps->producer, ctime(&now)); |
---|
3222 | |
---|
3223 | fprintf(gl2ps->stream, |
---|
3224 | "\\setlength{\\unitlength}{1pt}\n" |
---|
3225 | "\\begin{picture}(0,0)\n" |
---|
3226 | "\\includegraphics{%s}\n" |
---|
3227 | "\\end{picture}%%\n" |
---|
3228 | "%s\\begin{picture}(%d,%d)(0,0)\n", |
---|
3229 | name, (gl2ps->options & GL2PS_LANDSCAPE) ? "\\rotatebox{90}{" : "", |
---|
3230 | (int)gl2ps->viewport[2], (int)gl2ps->viewport[3]); |
---|
3231 | } |
---|
3232 | |
---|
3233 | static void gl2psPrintTeXPrimitive(void *data) |
---|
3234 | { |
---|
3235 | GL2PSprimitive *prim; |
---|
3236 | |
---|
3237 | prim = *(GL2PSprimitive**)data; |
---|
3238 | |
---|
3239 | switch(prim->type){ |
---|
3240 | case GL2PS_TEXT : |
---|
3241 | fprintf(gl2ps->stream, "\\fontsize{%d}{0}\n\\selectfont", |
---|
3242 | prim->data.text->fontsize); |
---|
3243 | fprintf(gl2ps->stream, "\\put(%g,%g){\\makebox(0,0)", |
---|
3244 | prim->verts[0].xyz[0], prim->verts[0].xyz[1]); |
---|
3245 | switch(prim->data.text->alignment){ |
---|
3246 | case GL2PS_TEXT_C: |
---|
3247 | fprintf(gl2ps->stream, "{"); |
---|
3248 | break; |
---|
3249 | case GL2PS_TEXT_CL: |
---|
3250 | fprintf(gl2ps->stream, "[l]{"); |
---|
3251 | break; |
---|
3252 | case GL2PS_TEXT_CR: |
---|
3253 | fprintf(gl2ps->stream, "[r]{"); |
---|
3254 | break; |
---|
3255 | case GL2PS_TEXT_B: |
---|
3256 | fprintf(gl2ps->stream, "[b]{"); |
---|
3257 | break; |
---|
3258 | case GL2PS_TEXT_BR: |
---|
3259 | fprintf(gl2ps->stream, "[br]{"); |
---|
3260 | break; |
---|
3261 | case GL2PS_TEXT_T: |
---|
3262 | fprintf(gl2ps->stream, "[t]{"); |
---|
3263 | break; |
---|
3264 | case GL2PS_TEXT_TL: |
---|
3265 | fprintf(gl2ps->stream, "[tl]{"); |
---|
3266 | break; |
---|
3267 | case GL2PS_TEXT_TR: |
---|
3268 | fprintf(gl2ps->stream, "[tr]{"); |
---|
3269 | break; |
---|
3270 | case GL2PS_TEXT_BL: |
---|
3271 | default: |
---|
3272 | fprintf(gl2ps->stream, "[bl]{"); |
---|
3273 | break; |
---|
3274 | } |
---|
3275 | if(prim->data.text->angle) |
---|
3276 | fprintf(gl2ps->stream, "\\rotatebox{%g}{", prim->data.text->angle); |
---|
3277 | fprintf(gl2ps->stream, "\\textcolor[rgb]{%g,%g,%g}{{%s}}", |
---|
3278 | prim->verts[0].rgba[0], prim->verts[0].rgba[1], prim->verts[0].rgba[2], |
---|
3279 | prim->data.text->str); |
---|
3280 | if(prim->data.text->angle) |
---|
3281 | fprintf(gl2ps->stream, "}"); |
---|
3282 | fprintf(gl2ps->stream, "}}\n"); |
---|
3283 | break; |
---|
3284 | case GL2PS_SPECIAL : |
---|
3285 | /* alignment contains the format for which the special output text |
---|
3286 | is intended */ |
---|
3287 | if (prim->data.text->alignment == GL2PS_TEX) |
---|
3288 | fprintf(gl2ps->stream, "%s\n", prim->data.text->str); |
---|
3289 | break; |
---|
3290 | default : |
---|
3291 | break; |
---|
3292 | } |
---|
3293 | } |
---|
3294 | |
---|
3295 | static void gl2psPrintTeXFooter(void) |
---|
3296 | { |
---|
3297 | fprintf(gl2ps->stream, "\\end{picture}%s\n", |
---|
3298 | (gl2ps->options & GL2PS_LANDSCAPE) ? "}" : ""); |
---|
3299 | } |
---|
3300 | |
---|
3301 | static void gl2psPrintTeXBeginViewport(GLint viewport[4]) |
---|
3302 | { |
---|
3303 | glRenderMode(GL_FEEDBACK); |
---|
3304 | |
---|
3305 | if(gl2ps->header){ |
---|
3306 | gl2psPrintTeXHeader(); |
---|
3307 | gl2ps->header = GL_FALSE; |
---|
3308 | } |
---|
3309 | } |
---|
3310 | |
---|
3311 | static GLint gl2psPrintTeXEndViewport(void) |
---|
3312 | { |
---|
3313 | return gl2psPrintPrimitives(); |
---|
3314 | } |
---|
3315 | |
---|
3316 | static void gl2psPrintTeXFinalPrimitive(void) |
---|
3317 | { |
---|
3318 | } |
---|
3319 | |
---|
3320 | /* definition of the LaTeX backend */ |
---|
3321 | |
---|
3322 | static GL2PSbackend gl2psTEX = { |
---|
3323 | gl2psPrintTeXHeader, |
---|
3324 | gl2psPrintTeXFooter, |
---|
3325 | gl2psPrintTeXBeginViewport, |
---|
3326 | gl2psPrintTeXEndViewport, |
---|
3327 | gl2psPrintTeXPrimitive, |
---|
3328 | gl2psPrintTeXFinalPrimitive, |
---|
3329 | "tex", |
---|
3330 | "LaTeX text" |
---|
3331 | }; |
---|
3332 | |
---|
3333 | /********************************************************************* |
---|
3334 | * |
---|
3335 | * PDF routines |
---|
3336 | * |
---|
3337 | *********************************************************************/ |
---|
3338 | |
---|
3339 | static int gl2psPrintPDFCompressorType(void) |
---|
3340 | { |
---|
3341 | #if defined(GL2PS_HAVE_ZLIB) |
---|
3342 | if(gl2ps->options & GL2PS_COMPRESS){ |
---|
3343 | return fprintf(gl2ps->stream, "/Filter [/FlateDecode]\n"); |
---|
3344 | } |
---|
3345 | #endif |
---|
3346 | return 0; |
---|
3347 | } |
---|
3348 | |
---|
3349 | static int gl2psPrintPDFStrokeColor(GL2PSrgba rgba) |
---|
3350 | { |
---|
3351 | int i, offs = 0; |
---|
3352 | |
---|
3353 | gl2psSetLastColor(rgba); |
---|
3354 | for(i = 0; i < 3; ++i){ |
---|
3355 | if(GL2PS_ZERO(rgba[i])) |
---|
3356 | offs += gl2psPrintf("%.0f ", 0.); |
---|
3357 | else if(rgba[i] < 1e-4 || rgba[i] > 1e6) /* avoid %e formatting */ |
---|
3358 | offs += gl2psPrintf("%f ", rgba[i]); |
---|
3359 | else |
---|
3360 | offs += gl2psPrintf("%g ", rgba[i]); |
---|
3361 | } |
---|
3362 | offs += gl2psPrintf("RG\n"); |
---|
3363 | return offs; |
---|
3364 | } |
---|
3365 | |
---|
3366 | static int gl2psPrintPDFFillColor(GL2PSrgba rgba) |
---|
3367 | { |
---|
3368 | int i, offs = 0; |
---|
3369 | |
---|
3370 | for(i = 0; i < 3; ++i){ |
---|
3371 | if(GL2PS_ZERO(rgba[i])) |
---|
3372 | offs += gl2psPrintf("%.0f ", 0.); |
---|
3373 | else if(rgba[i] < 1e-4 || rgba[i] > 1e6) /* avoid %e formatting */ |
---|
3374 | offs += gl2psPrintf("%f ", rgba[i]); |
---|
3375 | else |
---|
3376 | offs += gl2psPrintf("%g ", rgba[i]); |
---|
3377 | } |
---|
3378 | offs += gl2psPrintf("rg\n"); |
---|
3379 | return offs; |
---|
3380 | } |
---|
3381 | |
---|
3382 | static int gl2psPrintPDFLineWidth(GLfloat lw) |
---|
3383 | { |
---|
3384 | if(GL2PS_ZERO(lw)) |
---|
3385 | return gl2psPrintf("%.0f w\n", 0.); |
---|
3386 | else if(lw < 1e-4 || lw > 1e6) /* avoid %e formatting */ |
---|
3387 | return gl2psPrintf("%f w\n", lw); |
---|
3388 | else |
---|
3389 | return gl2psPrintf("%g w\n", lw); |
---|
3390 | } |
---|
3391 | |
---|
3392 | static void gl2psPutPDFText(GL2PSstring *text, int cnt, GLfloat x, GLfloat y) |
---|
3393 | { |
---|
3394 | GLfloat rad, crad, srad; |
---|
3395 | |
---|
3396 | if(text->angle == 0.0F){ |
---|
3397 | gl2ps->streamlength += gl2psPrintf |
---|
3398 | ("BT\n" |
---|
3399 | "/F%d %d Tf\n" |
---|
3400 | "%f %f Td\n" |
---|
3401 | "(%s) Tj\n" |
---|
3402 | "ET\n", |
---|
3403 | cnt, text->fontsize, x, y, text->str); |
---|
3404 | } |
---|
3405 | else{ |
---|
3406 | rad = M_PI * text->angle / 180.0F; |
---|
3407 | srad = (GLfloat)sin(rad); |
---|
3408 | crad = (GLfloat)cos(rad); |
---|
3409 | gl2ps->streamlength += gl2psPrintf |
---|
3410 | ("BT\n" |
---|
3411 | "/F%d %d Tf\n" |
---|
3412 | "%f %f %f %f %f %f Tm\n" |
---|
3413 | "(%s) Tj\n" |
---|
3414 | "ET\n", |
---|
3415 | cnt, text->fontsize, crad, srad, -srad, crad, x, y, text->str); |
---|
3416 | } |
---|
3417 | } |
---|
3418 | |
---|
3419 | static void gl2psPutPDFImage(GL2PSimage *image, int cnt, GLfloat x, GLfloat y) |
---|
3420 | { |
---|
3421 | gl2ps->streamlength += gl2psPrintf |
---|
3422 | ("q\n" |
---|
3423 | "%d 0 0 %d %f %f cm\n" |
---|
3424 | "/Im%d Do\n" |
---|
3425 | "Q\n", |
---|
3426 | (int)image->width, (int)image->height, x, y, cnt); |
---|
3427 | } |
---|
3428 | |
---|
3429 | static void gl2psPDFstacksInit(void) |
---|
3430 | { |
---|
3431 | gl2ps->objects_stack = 7 /* FIXED_XREF_ENTRIES */ + 1; |
---|
3432 | gl2ps->extgs_stack = 0; |
---|
3433 | gl2ps->font_stack = 0; |
---|
3434 | gl2ps->im_stack = 0; |
---|
3435 | gl2ps->trgroupobjects_stack = 0; |
---|
3436 | gl2ps->shader_stack = 0; |
---|
3437 | gl2ps->mshader_stack = 0; |
---|
3438 | } |
---|
3439 | |
---|
3440 | static void gl2psPDFgroupObjectInit(GL2PSpdfgroup *gro) |
---|
3441 | { |
---|
3442 | if(!gro) |
---|
3443 | return; |
---|
3444 | |
---|
3445 | gro->ptrlist = NULL; |
---|
3446 | gro->fontno = gro->gsno = gro->imno = gro->maskshno = gro->shno |
---|
3447 | = gro->trgroupno = gro->fontobjno = gro->imobjno = gro->shobjno |
---|
3448 | = gro->maskshobjno = gro->gsobjno = gro->trgroupobjno = -1; |
---|
3449 | } |
---|
3450 | |
---|
3451 | /* Build up group objects and assign name and object numbers */ |
---|
3452 | |
---|
3453 | static void gl2psPDFgroupListInit(void) |
---|
3454 | { |
---|
3455 | int i; |
---|
3456 | GL2PSprimitive *p = NULL; |
---|
3457 | GL2PSpdfgroup gro; |
---|
3458 | int lasttype = GL2PS_NO_TYPE; |
---|
3459 | GL2PSrgba lastrgba = {-1.0F, -1.0F, -1.0F, -1.0F}; |
---|
3460 | GLushort lastpattern = 0; |
---|
3461 | GLint lastfactor = 0; |
---|
3462 | GLfloat lastwidth = 1; |
---|
3463 | GL2PStriangle lastt, tmpt; |
---|
3464 | int lastTriangleWasNotSimpleWithSameColor = 0; |
---|
3465 | |
---|
3466 | if(!gl2ps->pdfprimlist) |
---|
3467 | return; |
---|
3468 | |
---|
3469 | gl2ps->pdfgrouplist = gl2psListCreate(500, 500, sizeof(GL2PSpdfgroup)); |
---|
3470 | gl2psInitTriangle(&lastt); |
---|
3471 | |
---|
3472 | for(i = 0; i < gl2psListNbr(gl2ps->pdfprimlist); ++i){ |
---|
3473 | p = *(GL2PSprimitive**)gl2psListPointer(gl2ps->pdfprimlist, i); |
---|
3474 | switch(p->type){ |
---|
3475 | case GL2PS_PIXMAP: |
---|
3476 | gl2psPDFgroupObjectInit(&gro); |
---|
3477 | gro.ptrlist = gl2psListCreate(1, 2, sizeof(GL2PSprimitive*)); |
---|
3478 | gro.imno = gl2ps->im_stack++; |
---|
3479 | gl2psListAdd(gro.ptrlist, &p); |
---|
3480 | gl2psListAdd(gl2ps->pdfgrouplist, &gro); |
---|
3481 | break; |
---|
3482 | case GL2PS_TEXT: |
---|
3483 | gl2psPDFgroupObjectInit(&gro); |
---|
3484 | gro.ptrlist = gl2psListCreate(1, 2, sizeof(GL2PSprimitive*)); |
---|
3485 | gro.fontno = gl2ps->font_stack++; |
---|
3486 | gl2psListAdd(gro.ptrlist, &p); |
---|
3487 | gl2psListAdd(gl2ps->pdfgrouplist, &gro); |
---|
3488 | break; |
---|
3489 | case GL2PS_LINE: |
---|
3490 | if(lasttype != p->type || lastwidth != p->width || |
---|
3491 | lastpattern != p->pattern || lastfactor != p->factor || |
---|
3492 | !gl2psSameColor(p->verts[0].rgba, lastrgba)){ |
---|
3493 | gl2psPDFgroupObjectInit(&gro); |
---|
3494 | gro.ptrlist = gl2psListCreate(1, 2, sizeof(GL2PSprimitive*)); |
---|
3495 | gl2psListAdd(gro.ptrlist, &p); |
---|
3496 | gl2psListAdd(gl2ps->pdfgrouplist, &gro); |
---|
3497 | } |
---|
3498 | else{ |
---|
3499 | gl2psListAdd(gro.ptrlist, &p); |
---|
3500 | } |
---|
3501 | lastpattern = p->pattern; |
---|
3502 | lastfactor = p->factor; |
---|
3503 | lastwidth = p->width; |
---|
3504 | lastrgba[0] = p->verts[0].rgba[0]; |
---|
3505 | lastrgba[1] = p->verts[0].rgba[1]; |
---|
3506 | lastrgba[2] = p->verts[0].rgba[2]; |
---|
3507 | break; |
---|
3508 | case GL2PS_POINT: |
---|
3509 | if(lasttype != p->type || lastwidth != p->width || |
---|
3510 | !gl2psSameColor(p->verts[0].rgba, lastrgba)){ |
---|
3511 | gl2psPDFgroupObjectInit(&gro); |
---|
3512 | gro.ptrlist = gl2psListCreate(1,2,sizeof(GL2PSprimitive*)); |
---|
3513 | gl2psListAdd(gro.ptrlist, &p); |
---|
3514 | gl2psListAdd(gl2ps->pdfgrouplist, &gro); |
---|
3515 | } |
---|
3516 | else{ |
---|
3517 | gl2psListAdd(gro.ptrlist, &p); |
---|
3518 | } |
---|
3519 | lastwidth = p->width; |
---|
3520 | lastrgba[0] = p->verts[0].rgba[0]; |
---|
3521 | lastrgba[1] = p->verts[0].rgba[1]; |
---|
3522 | lastrgba[2] = p->verts[0].rgba[2]; |
---|
3523 | break; |
---|
3524 | case GL2PS_TRIANGLE: |
---|
3525 | gl2psFillTriangleFromPrimitive(&tmpt, p, GL_TRUE); |
---|
3526 | lastTriangleWasNotSimpleWithSameColor = |
---|
3527 | !(tmpt.prop & T_CONST_COLOR && tmpt.prop & T_ALPHA_1) || |
---|
3528 | !gl2psSameColor(tmpt.vertex[0].rgba, lastt.vertex[0].rgba); |
---|
3529 | if(lasttype == p->type && tmpt.prop == lastt.prop && |
---|
3530 | lastTriangleWasNotSimpleWithSameColor){ |
---|
3531 | /* TODO Check here for last alpha */ |
---|
3532 | gl2psListAdd(gro.ptrlist, &p); |
---|
3533 | } |
---|
3534 | else{ |
---|
3535 | gl2psPDFgroupObjectInit(&gro); |
---|
3536 | gro.ptrlist = gl2psListCreate(1, 2, sizeof(GL2PSprimitive*)); |
---|
3537 | gl2psListAdd(gro.ptrlist, &p); |
---|
3538 | gl2psListAdd(gl2ps->pdfgrouplist, &gro); |
---|
3539 | } |
---|
3540 | lastt = tmpt; |
---|
3541 | break; |
---|
3542 | default: |
---|
3543 | break; |
---|
3544 | } |
---|
3545 | lasttype = p->type; |
---|
3546 | } |
---|
3547 | } |
---|
3548 | |
---|
3549 | static void gl2psSortOutTrianglePDFgroup(GL2PSpdfgroup *gro) |
---|
3550 | { |
---|
3551 | GL2PStriangle t; |
---|
3552 | GL2PSprimitive *prim = NULL; |
---|
3553 | |
---|
3554 | if(!gro) |
---|
3555 | return; |
---|
3556 | |
---|
3557 | if(!gl2psListNbr(gro->ptrlist)) |
---|
3558 | return; |
---|
3559 | |
---|
3560 | prim = *(GL2PSprimitive**)gl2psListPointer(gro->ptrlist, 0); |
---|
3561 | |
---|
3562 | if(prim->type != GL2PS_TRIANGLE) |
---|
3563 | return; |
---|
3564 | |
---|
3565 | gl2psFillTriangleFromPrimitive(&t, prim, GL_TRUE); |
---|
3566 | |
---|
3567 | if(t.prop & T_CONST_COLOR && t.prop & T_ALPHA_LESS_1){ |
---|
3568 | gro->gsno = gl2ps->extgs_stack++; |
---|
3569 | gro->gsobjno = gl2ps->objects_stack ++; |
---|
3570 | } |
---|
3571 | else if(t.prop & T_CONST_COLOR && t.prop & T_VAR_ALPHA){ |
---|
3572 | gro->gsno = gl2ps->extgs_stack++; |
---|
3573 | gro->gsobjno = gl2ps->objects_stack++; |
---|
3574 | gro->trgroupno = gl2ps->trgroupobjects_stack++; |
---|
3575 | gro->trgroupobjno = gl2ps->objects_stack++; |
---|
3576 | gro->maskshno = gl2ps->mshader_stack++; |
---|
3577 | gro->maskshobjno = gl2ps->objects_stack++; |
---|
3578 | } |
---|
3579 | else if(t.prop & T_VAR_COLOR && t.prop & T_ALPHA_1){ |
---|
3580 | gro->shno = gl2ps->shader_stack++; |
---|
3581 | gro->shobjno = gl2ps->objects_stack++; |
---|
3582 | } |
---|
3583 | else if(t.prop & T_VAR_COLOR && t.prop & T_ALPHA_LESS_1){ |
---|
3584 | gro->gsno = gl2ps->extgs_stack++; |
---|
3585 | gro->gsobjno = gl2ps->objects_stack++; |
---|
3586 | gro->shno = gl2ps->shader_stack++; |
---|
3587 | gro->shobjno = gl2ps->objects_stack++; |
---|
3588 | } |
---|
3589 | else if(t.prop & T_VAR_COLOR && t.prop & T_VAR_ALPHA){ |
---|
3590 | gro->gsno = gl2ps->extgs_stack++; |
---|
3591 | gro->gsobjno = gl2ps->objects_stack++; |
---|
3592 | gro->shno = gl2ps->shader_stack++; |
---|
3593 | gro->shobjno = gl2ps->objects_stack++; |
---|
3594 | gro->trgroupno = gl2ps->trgroupobjects_stack++; |
---|
3595 | gro->trgroupobjno = gl2ps->objects_stack++; |
---|
3596 | gro->maskshno = gl2ps->mshader_stack++; |
---|
3597 | gro->maskshobjno = gl2ps->objects_stack++; |
---|
3598 | } |
---|
3599 | } |
---|
3600 | |
---|
3601 | /* Main stream data */ |
---|
3602 | |
---|
3603 | static void gl2psPDFgroupListWriteMainStream(void) |
---|
3604 | { |
---|
3605 | int i, j, lastel; |
---|
3606 | GL2PSprimitive *prim = NULL, *prev = NULL; |
---|
3607 | GL2PSpdfgroup *gro; |
---|
3608 | GL2PStriangle t; |
---|
3609 | |
---|
3610 | if(!gl2ps->pdfgrouplist) |
---|
3611 | return; |
---|
3612 | |
---|
3613 | for(i = 0; i < gl2psListNbr(gl2ps->pdfgrouplist); ++i){ |
---|
3614 | gro = (GL2PSpdfgroup*)gl2psListPointer(gl2ps->pdfgrouplist, i); |
---|
3615 | |
---|
3616 | lastel = gl2psListNbr(gro->ptrlist) - 1; |
---|
3617 | if(lastel < 0) |
---|
3618 | continue; |
---|
3619 | |
---|
3620 | prim = *(GL2PSprimitive**)gl2psListPointer(gro->ptrlist, 0); |
---|
3621 | |
---|
3622 | switch(prim->type){ |
---|
3623 | case GL2PS_POINT: |
---|
3624 | gl2ps->streamlength += gl2psPrintf("1 J\n"); |
---|
3625 | gl2ps->streamlength += gl2psPrintPDFLineWidth(prim->width); |
---|
3626 | gl2ps->streamlength += gl2psPrintPDFStrokeColor(prim->verts[0].rgba); |
---|
3627 | for(j = 0; j <= lastel; ++j){ |
---|
3628 | prim = *(GL2PSprimitive**)gl2psListPointer(gro->ptrlist, j); |
---|
3629 | gl2ps->streamlength += |
---|
3630 | gl2psPrintf("%f %f m %f %f l\n", |
---|
3631 | prim->verts[0].xyz[0], prim->verts[0].xyz[1], |
---|
3632 | prim->verts[0].xyz[0], prim->verts[0].xyz[1]); |
---|
3633 | } |
---|
3634 | gl2ps->streamlength += gl2psPrintf("S\n"); |
---|
3635 | gl2ps->streamlength += gl2psPrintf("0 J\n"); |
---|
3636 | break; |
---|
3637 | case GL2PS_LINE: |
---|
3638 | /* We try to use as few paths as possible to draw lines, in |
---|
3639 | order to get nice stippling even when the individual segments |
---|
3640 | are smaller than the stipple */ |
---|
3641 | gl2ps->streamlength += gl2psPrintPDFLineWidth(prim->width); |
---|
3642 | gl2ps->streamlength += gl2psPrintPDFStrokeColor(prim->verts[0].rgba); |
---|
3643 | gl2ps->streamlength += gl2psPrintPostScriptDash(prim->pattern, prim->factor, "d"); |
---|
3644 | /* start new path */ |
---|
3645 | gl2ps->streamlength += |
---|
3646 | gl2psPrintf("%f %f m\n", |
---|
3647 | prim->verts[0].xyz[0], prim->verts[0].xyz[1]); |
---|
3648 | |
---|
3649 | for(j = 1; j <= lastel; ++j){ |
---|
3650 | prev = prim; |
---|
3651 | prim = *(GL2PSprimitive**)gl2psListPointer(gro->ptrlist, j); |
---|
3652 | if(!gl2psSamePosition(prim->verts[0].xyz, prev->verts[1].xyz)){ |
---|
3653 | /* the starting point of the new segment does not match the |
---|
3654 | end point of the previous line, so we end the current |
---|
3655 | path and start a new one */ |
---|
3656 | gl2ps->streamlength += |
---|
3657 | gl2psPrintf("%f %f l\n", |
---|
3658 | prev->verts[1].xyz[0], prev->verts[1].xyz[1]); |
---|
3659 | gl2ps->streamlength += |
---|
3660 | gl2psPrintf("%f %f m\n", |
---|
3661 | prim->verts[0].xyz[0], prim->verts[0].xyz[1]); |
---|
3662 | } |
---|
3663 | else{ |
---|
3664 | /* the two segements are connected, so we just append to the |
---|
3665 | current path */ |
---|
3666 | gl2ps->streamlength += |
---|
3667 | gl2psPrintf("%f %f l\n", |
---|
3668 | prim->verts[0].xyz[0], prim->verts[0].xyz[1]); |
---|
3669 | } |
---|
3670 | } |
---|
3671 | /* end last path */ |
---|
3672 | gl2ps->streamlength += |
---|
3673 | gl2psPrintf("%f %f l\n", |
---|
3674 | prim->verts[1].xyz[0], prim->verts[1].xyz[1]); |
---|
3675 | gl2ps->streamlength += gl2psPrintf("S\n"); |
---|
3676 | break; |
---|
3677 | case GL2PS_TRIANGLE: |
---|
3678 | gl2psFillTriangleFromPrimitive(&t, prim, GL_TRUE); |
---|
3679 | gl2psSortOutTrianglePDFgroup(gro); |
---|
3680 | |
---|
3681 | /* No alpha and const color: Simple PDF draw orders */ |
---|
3682 | if(t.prop & T_CONST_COLOR && t.prop & T_ALPHA_1){ |
---|
3683 | gl2ps->streamlength += gl2psPrintPDFFillColor(t.vertex[0].rgba); |
---|
3684 | for(j = 0; j <= lastel; ++j){ |
---|
3685 | prim = *(GL2PSprimitive**)gl2psListPointer(gro->ptrlist, j); |
---|
3686 | gl2psFillTriangleFromPrimitive(&t, prim, GL_FALSE); |
---|
3687 | gl2ps->streamlength |
---|
3688 | += gl2psPrintf("%f %f m\n" |
---|
3689 | "%f %f l\n" |
---|
3690 | "%f %f l\n" |
---|
3691 | "h f\n", |
---|
3692 | t.vertex[0].xyz[0], t.vertex[0].xyz[1], |
---|
3693 | t.vertex[1].xyz[0], t.vertex[1].xyz[1], |
---|
3694 | t.vertex[2].xyz[0], t.vertex[2].xyz[1]); |
---|
3695 | } |
---|
3696 | } |
---|
3697 | /* Const alpha < 1 and const color: Simple PDF draw orders |
---|
3698 | and an extra extended Graphics State for the alpha const */ |
---|
3699 | else if(t.prop & T_CONST_COLOR && t.prop & T_ALPHA_LESS_1){ |
---|
3700 | gl2ps->streamlength += gl2psPrintf("q\n" |
---|
3701 | "/GS%d gs\n", |
---|
3702 | gro->gsno); |
---|
3703 | gl2ps->streamlength += gl2psPrintPDFFillColor(prim->verts[0].rgba); |
---|
3704 | for(j = 0; j <= lastel; ++j){ |
---|
3705 | prim = *(GL2PSprimitive**)gl2psListPointer(gro->ptrlist, j); |
---|
3706 | gl2psFillTriangleFromPrimitive(&t, prim, GL_FALSE); |
---|
3707 | gl2ps->streamlength |
---|
3708 | += gl2psPrintf("%f %f m\n" |
---|
3709 | "%f %f l\n" |
---|
3710 | "%f %f l\n" |
---|
3711 | "h f\n", |
---|
3712 | t.vertex[0].xyz[0], t.vertex[0].xyz[1], |
---|
3713 | t.vertex[1].xyz[0], t.vertex[1].xyz[1], |
---|
3714 | t.vertex[2].xyz[0], t.vertex[2].xyz[1]); |
---|
3715 | } |
---|
3716 | gl2ps->streamlength += gl2psPrintf("Q\n"); |
---|
3717 | } |
---|
3718 | /* Variable alpha and const color: Simple PDF draw orders |
---|
3719 | and an extra extended Graphics State + Xobject + Shader |
---|
3720 | object for the alpha mask */ |
---|
3721 | else if(t.prop & T_CONST_COLOR && t.prop & T_VAR_ALPHA){ |
---|
3722 | gl2ps->streamlength += gl2psPrintf("q\n" |
---|
3723 | "/GS%d gs\n" |
---|
3724 | "/TrG%d Do\n", |
---|
3725 | gro->gsno, gro->trgroupno); |
---|
3726 | gl2ps->streamlength += gl2psPrintPDFFillColor(prim->verts[0].rgba); |
---|
3727 | for(j = 0; j <= lastel; ++j){ |
---|
3728 | prim = *(GL2PSprimitive**)gl2psListPointer(gro->ptrlist, j); |
---|
3729 | gl2psFillTriangleFromPrimitive(&t, prim, GL_FALSE); |
---|
3730 | gl2ps->streamlength |
---|
3731 | += gl2psPrintf("%f %f m\n" |
---|
3732 | "%f %f l\n" |
---|
3733 | "%f %f l\n" |
---|
3734 | "h f\n", |
---|
3735 | t.vertex[0].xyz[0], t.vertex[0].xyz[1], |
---|
3736 | t.vertex[1].xyz[0], t.vertex[1].xyz[1], |
---|
3737 | t.vertex[2].xyz[0], t.vertex[2].xyz[1]); |
---|
3738 | } |
---|
3739 | gl2ps->streamlength += gl2psPrintf("Q\n"); |
---|
3740 | } |
---|
3741 | /* Variable color and no alpha: Shader Object for the colored |
---|
3742 | triangle(s) */ |
---|
3743 | else if(t.prop & T_VAR_COLOR && t.prop & T_ALPHA_1){ |
---|
3744 | gl2ps->streamlength += gl2psPrintf("/Sh%d sh\n", gro->shno); |
---|
3745 | } |
---|
3746 | /* Variable color and const alpha < 1: Shader Object for the |
---|
3747 | colored triangle(s) and an extra extended Graphics State |
---|
3748 | for the alpha const */ |
---|
3749 | else if(t.prop & T_VAR_COLOR && t.prop & T_ALPHA_LESS_1){ |
---|
3750 | gl2ps->streamlength += gl2psPrintf("q\n" |
---|
3751 | "/GS%d gs\n" |
---|
3752 | "/Sh%d sh\n" |
---|
3753 | "Q\n", |
---|
3754 | gro->gsno, gro->shno); |
---|
3755 | } |
---|
3756 | /* Variable alpha and color: Shader Object for the colored |
---|
3757 | triangle(s) and an extra extended Graphics State |
---|
3758 | + Xobject + Shader object for the alpha mask */ |
---|
3759 | else if(t.prop & T_VAR_COLOR && t.prop & T_VAR_ALPHA){ |
---|
3760 | gl2ps->streamlength += gl2psPrintf("q\n" |
---|
3761 | "/GS%d gs\n" |
---|
3762 | "/TrG%d Do\n" |
---|
3763 | "/Sh%d sh\n" |
---|
3764 | "Q\n", |
---|
3765 | gro->gsno, gro->trgroupno, gro->shno); |
---|
3766 | } |
---|
3767 | break; |
---|
3768 | case GL2PS_PIXMAP: |
---|
3769 | for(j = 0; j <= lastel; ++j){ |
---|
3770 | prim = *(GL2PSprimitive**)gl2psListPointer(gro->ptrlist, j); |
---|
3771 | gl2psPutPDFImage(prim->data.image, gro->imno, prim->verts[0].xyz[0], |
---|
3772 | prim->verts[0].xyz[1]); |
---|
3773 | } |
---|
3774 | break; |
---|
3775 | case GL2PS_TEXT: |
---|
3776 | for(j = 0; j <= lastel; ++j){ |
---|
3777 | prim = *(GL2PSprimitive**)gl2psListPointer(gro->ptrlist, j); |
---|
3778 | gl2ps->streamlength += gl2psPrintPDFFillColor(prim->verts[0].rgba); |
---|
3779 | gl2psPutPDFText(prim->data.text, gro->fontno, prim->verts[0].xyz[0], |
---|
3780 | prim->verts[0].xyz[1]); |
---|
3781 | } |
---|
3782 | break; |
---|
3783 | default: |
---|
3784 | break; |
---|
3785 | } |
---|
3786 | } |
---|
3787 | } |
---|
3788 | |
---|
3789 | /* Graphics State names */ |
---|
3790 | |
---|
3791 | static int gl2psPDFgroupListWriteGStateResources(void) |
---|
3792 | { |
---|
3793 | GL2PSpdfgroup *gro; |
---|
3794 | int offs = 0; |
---|
3795 | int i; |
---|
3796 | |
---|
3797 | offs += fprintf(gl2ps->stream, |
---|
3798 | "/ExtGState\n" |
---|
3799 | "<<\n" |
---|
3800 | "/GSa 7 0 R\n"); |
---|
3801 | for(i = 0; i < gl2psListNbr(gl2ps->pdfgrouplist); ++i){ |
---|
3802 | gro = (GL2PSpdfgroup*)gl2psListPointer(gl2ps->pdfgrouplist, i); |
---|
3803 | if(gro->gsno >= 0) |
---|
3804 | offs += fprintf(gl2ps->stream, "/GS%d %d 0 R\n", gro->gsno, gro->gsobjno); |
---|
3805 | } |
---|
3806 | offs += fprintf(gl2ps->stream, ">>\n"); |
---|
3807 | return offs; |
---|
3808 | } |
---|
3809 | |
---|
3810 | /* Main Shader names */ |
---|
3811 | |
---|
3812 | static int gl2psPDFgroupListWriteShaderResources(void) |
---|
3813 | { |
---|
3814 | GL2PSpdfgroup *gro; |
---|
3815 | int offs = 0; |
---|
3816 | int i; |
---|
3817 | |
---|
3818 | offs += fprintf(gl2ps->stream, |
---|
3819 | "/Shading\n" |
---|
3820 | "<<\n"); |
---|
3821 | for(i = 0; i < gl2psListNbr(gl2ps->pdfgrouplist); ++i){ |
---|
3822 | gro = (GL2PSpdfgroup*)gl2psListPointer(gl2ps->pdfgrouplist, i); |
---|
3823 | if(gro->shno >= 0) |
---|
3824 | offs += fprintf(gl2ps->stream, "/Sh%d %d 0 R\n", gro->shno, gro->shobjno); |
---|
3825 | if(gro->maskshno >= 0) |
---|
3826 | offs += fprintf(gl2ps->stream, "/TrSh%d %d 0 R\n", gro->maskshno, gro->maskshobjno); |
---|
3827 | } |
---|
3828 | offs += fprintf(gl2ps->stream,">>\n"); |
---|
3829 | return offs; |
---|
3830 | } |
---|
3831 | |
---|
3832 | /* Images & Mask Shader XObject names */ |
---|
3833 | |
---|
3834 | static int gl2psPDFgroupListWriteXObjectResources(void) |
---|
3835 | { |
---|
3836 | int i; |
---|
3837 | GL2PSprimitive *p = NULL; |
---|
3838 | GL2PSpdfgroup *gro; |
---|
3839 | int offs = 0; |
---|
3840 | |
---|
3841 | offs += fprintf(gl2ps->stream, |
---|
3842 | "/XObject\n" |
---|
3843 | "<<\n"); |
---|
3844 | |
---|
3845 | for(i = 0; i < gl2psListNbr(gl2ps->pdfgrouplist); ++i){ |
---|
3846 | gro = (GL2PSpdfgroup*)gl2psListPointer(gl2ps->pdfgrouplist, i); |
---|
3847 | if(!gl2psListNbr(gro->ptrlist)) |
---|
3848 | continue; |
---|
3849 | p = *(GL2PSprimitive**)gl2psListPointer(gro->ptrlist, 0); |
---|
3850 | switch(p->type){ |
---|
3851 | case GL2PS_PIXMAP: |
---|
3852 | gro->imobjno = gl2ps->objects_stack++; |
---|
3853 | if(GL_RGBA == p->data.image->format) /* reserve one object for image mask */ |
---|
3854 | gl2ps->objects_stack++; |
---|
3855 | offs += fprintf(gl2ps->stream, "/Im%d %d 0 R\n", gro->imno, gro->imobjno); |
---|
3856 | case GL2PS_TRIANGLE: |
---|
3857 | if(gro->trgroupno >=0) |
---|
3858 | offs += fprintf(gl2ps->stream, "/TrG%d %d 0 R\n", gro->trgroupno, gro->trgroupobjno); |
---|
3859 | break; |
---|
3860 | default: |
---|
3861 | break; |
---|
3862 | } |
---|
3863 | } |
---|
3864 | offs += fprintf(gl2ps->stream,">>\n"); |
---|
3865 | return offs; |
---|
3866 | } |
---|
3867 | |
---|
3868 | /* Font names */ |
---|
3869 | |
---|
3870 | static int gl2psPDFgroupListWriteFontResources(void) |
---|
3871 | { |
---|
3872 | int i; |
---|
3873 | GL2PSpdfgroup *gro; |
---|
3874 | int offs = 0; |
---|
3875 | |
---|
3876 | offs += fprintf(gl2ps->stream, "/Font\n<<\n"); |
---|
3877 | |
---|
3878 | for(i = 0; i < gl2psListNbr(gl2ps->pdfgrouplist); ++i){ |
---|
3879 | gro = (GL2PSpdfgroup*)gl2psListPointer(gl2ps->pdfgrouplist, i); |
---|
3880 | if(gro->fontno < 0) |
---|
3881 | continue; |
---|
3882 | gro->fontobjno = gl2ps->objects_stack++; |
---|
3883 | offs += fprintf(gl2ps->stream, "/F%d %d 0 R\n", gro->fontno, gro->fontobjno); |
---|
3884 | } |
---|
3885 | offs += fprintf(gl2ps->stream, ">>\n"); |
---|
3886 | |
---|
3887 | return offs; |
---|
3888 | } |
---|
3889 | |
---|
3890 | static void gl2psPDFgroupListDelete(void) |
---|
3891 | { |
---|
3892 | int i; |
---|
3893 | GL2PSpdfgroup *gro = NULL; |
---|
3894 | |
---|
3895 | if(!gl2ps->pdfgrouplist) |
---|
3896 | return; |
---|
3897 | |
---|
3898 | for(i = 0; i < gl2psListNbr(gl2ps->pdfgrouplist); ++i){ |
---|
3899 | gro = (GL2PSpdfgroup*)gl2psListPointer(gl2ps->pdfgrouplist,i); |
---|
3900 | gl2psListDelete(gro->ptrlist); |
---|
3901 | } |
---|
3902 | |
---|
3903 | gl2psListDelete(gl2ps->pdfgrouplist); |
---|
3904 | gl2ps->pdfgrouplist = NULL; |
---|
3905 | } |
---|
3906 | |
---|
3907 | /* Print 1st PDF object - file info */ |
---|
3908 | |
---|
3909 | static int gl2psPrintPDFInfo(void) |
---|
3910 | { |
---|
3911 | int offs; |
---|
3912 | time_t now; |
---|
3913 | struct tm *newtime; |
---|
3914 | |
---|
3915 | time(&now); |
---|
3916 | newtime = gmtime(&now); |
---|
3917 | |
---|
3918 | offs = fprintf(gl2ps->stream, |
---|
3919 | "1 0 obj\n" |
---|
3920 | "<<\n" |
---|
3921 | "/Title (%s)\n" |
---|
3922 | "/Creator (GL2PS %d.%d.%d%s, %s)\n" |
---|
3923 | "/Producer (%s)\n", |
---|
3924 | gl2ps->title, GL2PS_MAJOR_VERSION, GL2PS_MINOR_VERSION, |
---|
3925 | GL2PS_PATCH_VERSION, GL2PS_EXTRA_VERSION, GL2PS_COPYRIGHT, |
---|
3926 | gl2ps->producer); |
---|
3927 | |
---|
3928 | if(!newtime){ |
---|
3929 | offs += fprintf(gl2ps->stream, |
---|
3930 | ">>\n" |
---|
3931 | "endobj\n"); |
---|
3932 | return offs; |
---|
3933 | } |
---|
3934 | |
---|
3935 | offs += fprintf(gl2ps->stream, |
---|
3936 | "/CreationDate (D:%d%02d%02d%02d%02d%02d)\n" |
---|
3937 | ">>\n" |
---|
3938 | "endobj\n", |
---|
3939 | newtime->tm_year+1900, |
---|
3940 | newtime->tm_mon+1, |
---|
3941 | newtime->tm_mday, |
---|
3942 | newtime->tm_hour, |
---|
3943 | newtime->tm_min, |
---|
3944 | newtime->tm_sec); |
---|
3945 | return offs; |
---|
3946 | } |
---|
3947 | |
---|
3948 | /* Create catalog and page structure - 2nd and 3th PDF object */ |
---|
3949 | |
---|
3950 | static int gl2psPrintPDFCatalog(void) |
---|
3951 | { |
---|
3952 | return fprintf(gl2ps->stream, |
---|
3953 | "2 0 obj\n" |
---|
3954 | "<<\n" |
---|
3955 | "/Type /Catalog\n" |
---|
3956 | "/Pages 3 0 R\n" |
---|
3957 | ">>\n" |
---|
3958 | "endobj\n"); |
---|
3959 | } |
---|
3960 | |
---|
3961 | static int gl2psPrintPDFPages(void) |
---|
3962 | { |
---|
3963 | return fprintf(gl2ps->stream, |
---|
3964 | "3 0 obj\n" |
---|
3965 | "<<\n" |
---|
3966 | "/Type /Pages\n" |
---|
3967 | "/Kids [6 0 R]\n" |
---|
3968 | "/Count 1\n" |
---|
3969 | ">>\n" |
---|
3970 | "endobj\n"); |
---|
3971 | } |
---|
3972 | |
---|
3973 | /* Open stream for data - graphical objects, fonts etc. PDF object 4 */ |
---|
3974 | |
---|
3975 | static int gl2psOpenPDFDataStream(void) |
---|
3976 | { |
---|
3977 | int offs = 0; |
---|
3978 | |
---|
3979 | offs += fprintf(gl2ps->stream, |
---|
3980 | "4 0 obj\n" |
---|
3981 | "<<\n" |
---|
3982 | "/Length 5 0 R\n" ); |
---|
3983 | offs += gl2psPrintPDFCompressorType(); |
---|
3984 | offs += fprintf(gl2ps->stream, |
---|
3985 | ">>\n" |
---|
3986 | "stream\n"); |
---|
3987 | return offs; |
---|
3988 | } |
---|
3989 | |
---|
3990 | /* Stream setup - Graphics state, fill background if allowed */ |
---|
3991 | |
---|
3992 | static int gl2psOpenPDFDataStreamWritePreface(void) |
---|
3993 | { |
---|
3994 | int offs; |
---|
3995 | |
---|
3996 | offs = gl2psPrintf("/GSa gs\n"); |
---|
3997 | |
---|
3998 | if(gl2ps->options & GL2PS_DRAW_BACKGROUND){ |
---|
3999 | offs += gl2psPrintPDFFillColor(gl2ps->bgcolor); |
---|
4000 | offs += gl2psPrintf("%d %d %d %d re\n", |
---|
4001 | (int)gl2ps->viewport[0], (int)gl2ps->viewport[1], |
---|
4002 | (int)gl2ps->viewport[2], (int)gl2ps->viewport[3]); |
---|
4003 | offs += gl2psPrintf("f\n"); |
---|
4004 | } |
---|
4005 | return offs; |
---|
4006 | } |
---|
4007 | |
---|
4008 | /* Use the functions above to create the first part of the PDF*/ |
---|
4009 | |
---|
4010 | static void gl2psPrintPDFHeader(void) |
---|
4011 | { |
---|
4012 | int offs = 0; |
---|
4013 | gl2ps->pdfprimlist = gl2psListCreate(500, 500, sizeof(GL2PSprimitive*)); |
---|
4014 | gl2psPDFstacksInit(); |
---|
4015 | |
---|
4016 | gl2ps->xreflist = (int*)gl2psMalloc(sizeof(int) * gl2ps->objects_stack); |
---|
4017 | |
---|
4018 | #if defined(GL2PS_HAVE_ZLIB) |
---|
4019 | if(gl2ps->options & GL2PS_COMPRESS){ |
---|
4020 | gl2psSetupCompress(); |
---|
4021 | } |
---|
4022 | #endif |
---|
4023 | gl2ps->xreflist[0] = 0; |
---|
4024 | offs += fprintf(gl2ps->stream, "%%PDF-1.4\n"); |
---|
4025 | gl2ps->xreflist[1] = offs; |
---|
4026 | |
---|
4027 | offs += gl2psPrintPDFInfo(); |
---|
4028 | gl2ps->xreflist[2] = offs; |
---|
4029 | |
---|
4030 | offs += gl2psPrintPDFCatalog(); |
---|
4031 | gl2ps->xreflist[3] = offs; |
---|
4032 | |
---|
4033 | offs += gl2psPrintPDFPages(); |
---|
4034 | gl2ps->xreflist[4] = offs; |
---|
4035 | |
---|
4036 | offs += gl2psOpenPDFDataStream(); |
---|
4037 | gl2ps->xreflist[5] = offs; /* finished in gl2psPrintPDFFooter */ |
---|
4038 | gl2ps->streamlength = gl2psOpenPDFDataStreamWritePreface(); |
---|
4039 | } |
---|
4040 | |
---|
4041 | /* The central primitive drawing */ |
---|
4042 | |
---|
4043 | static void gl2psPrintPDFPrimitive(void *data) |
---|
4044 | { |
---|
4045 | GL2PSprimitive *prim = *(GL2PSprimitive**)data; |
---|
4046 | |
---|
4047 | if((gl2ps->options & GL2PS_OCCLUSION_CULL) && prim->culled) |
---|
4048 | return; |
---|
4049 | |
---|
4050 | prim = gl2psCopyPrimitive(prim); /* deep copy */ |
---|
4051 | gl2psListAdd(gl2ps->pdfprimlist, &prim); |
---|
4052 | } |
---|
4053 | |
---|
4054 | /* close stream and ... */ |
---|
4055 | |
---|
4056 | static int gl2psClosePDFDataStream(void) |
---|
4057 | { |
---|
4058 | int offs = 0; |
---|
4059 | |
---|
4060 | #if defined(GL2PS_HAVE_ZLIB) |
---|
4061 | if(gl2ps->options & GL2PS_COMPRESS){ |
---|
4062 | if(Z_OK != gl2psDeflate()) |
---|
4063 | gl2psMsg(GL2PS_ERROR, "Zlib deflate error"); |
---|
4064 | else |
---|
4065 | fwrite(gl2ps->compress->dest, gl2ps->compress->destLen, 1, gl2ps->stream); |
---|
4066 | gl2ps->streamlength += gl2ps->compress->destLen; |
---|
4067 | |
---|
4068 | offs += gl2ps->streamlength; |
---|
4069 | gl2psFreeCompress(); |
---|
4070 | } |
---|
4071 | #endif |
---|
4072 | |
---|
4073 | offs += fprintf(gl2ps->stream, |
---|
4074 | "endstream\n" |
---|
4075 | "endobj\n"); |
---|
4076 | return offs; |
---|
4077 | } |
---|
4078 | |
---|
4079 | /* ... write the now known length object */ |
---|
4080 | |
---|
4081 | static int gl2psPrintPDFDataStreamLength(int val) |
---|
4082 | { |
---|
4083 | return fprintf(gl2ps->stream, |
---|
4084 | "5 0 obj\n" |
---|
4085 | "%d\n" |
---|
4086 | "endobj\n", val); |
---|
4087 | } |
---|
4088 | |
---|
4089 | /* Put the info created before in PDF objects */ |
---|
4090 | |
---|
4091 | static int gl2psPrintPDFOpenPage(void) |
---|
4092 | { |
---|
4093 | int offs; |
---|
4094 | |
---|
4095 | /* Write fixed part */ |
---|
4096 | |
---|
4097 | offs = fprintf(gl2ps->stream, |
---|
4098 | "6 0 obj\n" |
---|
4099 | "<<\n" |
---|
4100 | "/Type /Page\n" |
---|
4101 | "/Parent 3 0 R\n" |
---|
4102 | "/MediaBox [%d %d %d %d]\n", |
---|
4103 | (int)gl2ps->viewport[0], (int)gl2ps->viewport[1], |
---|
4104 | (int)gl2ps->viewport[2], (int)gl2ps->viewport[3]); |
---|
4105 | |
---|
4106 | if(gl2ps->options & GL2PS_LANDSCAPE) |
---|
4107 | offs += fprintf(gl2ps->stream, "/Rotate -90\n"); |
---|
4108 | |
---|
4109 | offs += fprintf(gl2ps->stream, |
---|
4110 | "/Contents 4 0 R\n" |
---|
4111 | "/Resources\n" |
---|
4112 | "<<\n" |
---|
4113 | "/ProcSet [/PDF /Text /ImageB /ImageC] %%/ImageI\n"); |
---|
4114 | |
---|
4115 | return offs; |
---|
4116 | |
---|
4117 | /* End fixed part, proceeds in gl2psPDFgroupListWriteVariableResources() */ |
---|
4118 | } |
---|
4119 | |
---|
4120 | static int gl2psPDFgroupListWriteVariableResources(void) |
---|
4121 | { |
---|
4122 | int offs = 0; |
---|
4123 | |
---|
4124 | /* a) Graphics States for shader alpha masks*/ |
---|
4125 | offs += gl2psPDFgroupListWriteGStateResources(); |
---|
4126 | |
---|
4127 | /* b) Shader and shader masks */ |
---|
4128 | offs += gl2psPDFgroupListWriteShaderResources(); |
---|
4129 | |
---|
4130 | /* c) XObjects (Images & Shader Masks) */ |
---|
4131 | offs += gl2psPDFgroupListWriteXObjectResources(); |
---|
4132 | |
---|
4133 | /* d) Fonts */ |
---|
4134 | offs += gl2psPDFgroupListWriteFontResources(); |
---|
4135 | |
---|
4136 | /* End resources and page */ |
---|
4137 | offs += fprintf(gl2ps->stream, |
---|
4138 | ">>\n" |
---|
4139 | ">>\n" |
---|
4140 | "endobj\n"); |
---|
4141 | return offs; |
---|
4142 | } |
---|
4143 | |
---|
4144 | /* Standard Graphics State */ |
---|
4145 | |
---|
4146 | static int gl2psPrintPDFGSObject(void) |
---|
4147 | { |
---|
4148 | return fprintf(gl2ps->stream, |
---|
4149 | "7 0 obj\n" |
---|
4150 | "<<\n" |
---|
4151 | "/Type /ExtGState\n" |
---|
4152 | "/SA false\n" |
---|
4153 | "/SM 0.02\n" |
---|
4154 | "/OP false\n" |
---|
4155 | "/op false\n" |
---|
4156 | "/OPM 0\n" |
---|
4157 | "/BG2 /Default\n" |
---|
4158 | "/UCR2 /Default\n" |
---|
4159 | "/TR2 /Default\n" |
---|
4160 | ">>\n" |
---|
4161 | "endobj\n"); |
---|
4162 | } |
---|
4163 | |
---|
4164 | /* Put vertex' edge flag (8bit) and coordinates (32bit) in shader stream */ |
---|
4165 | |
---|
4166 | static int gl2psPrintPDFShaderStreamDataCoord(GL2PSvertex *vertex, |
---|
4167 | size_t (*action)(unsigned long data, |
---|
4168 | size_t size), |
---|
4169 | GLfloat dx, GLfloat dy, |
---|
4170 | GLfloat xmin, GLfloat ymin) |
---|
4171 | { |
---|
4172 | int offs = 0; |
---|
4173 | unsigned long imap; |
---|
4174 | GLfloat diff; |
---|
4175 | double dmax = ~1UL; |
---|
4176 | char edgeflag = 0; |
---|
4177 | |
---|
4178 | /* FIXME: temp bux fix for 64 bit archs: */ |
---|
4179 | if(sizeof(unsigned long) == 8) dmax = dmax - 2048.; |
---|
4180 | |
---|
4181 | offs += (*action)(edgeflag, 1); |
---|
4182 | |
---|
4183 | /* The Shader stream in PDF requires to be in a 'big-endian' |
---|
4184 | order */ |
---|
4185 | |
---|
4186 | if(GL2PS_ZERO(dx * dy)){ |
---|
4187 | offs += (*action)(0, 4); |
---|
4188 | offs += (*action)(0, 4); |
---|
4189 | } |
---|
4190 | else{ |
---|
4191 | diff = (vertex->xyz[0] - xmin) / dx; |
---|
4192 | if(diff > 1) |
---|
4193 | diff = 1.0F; |
---|
4194 | else if(diff < 0) |
---|
4195 | diff = 0.0F; |
---|
4196 | imap = (unsigned long)(diff * dmax); |
---|
4197 | offs += (*action)(imap, 4); |
---|
4198 | |
---|
4199 | diff = (vertex->xyz[1] - ymin) / dy; |
---|
4200 | if(diff > 1) |
---|
4201 | diff = 1.0F; |
---|
4202 | else if(diff < 0) |
---|
4203 | diff = 0.0F; |
---|
4204 | imap = (unsigned long)(diff * dmax); |
---|
4205 | offs += (*action)(imap, 4); |
---|
4206 | } |
---|
4207 | |
---|
4208 | return offs; |
---|
4209 | } |
---|
4210 | |
---|
4211 | /* Put vertex' rgb value (8bit for every component) in shader stream */ |
---|
4212 | |
---|
4213 | static int gl2psPrintPDFShaderStreamDataRGB(GL2PSvertex *vertex, |
---|
4214 | size_t (*action)(unsigned long data, |
---|
4215 | size_t size)) |
---|
4216 | { |
---|
4217 | int offs = 0; |
---|
4218 | unsigned long imap; |
---|
4219 | double dmax = ~1UL; |
---|
4220 | |
---|
4221 | /* FIXME: temp bux fix for 64 bit archs: */ |
---|
4222 | if(sizeof(unsigned long) == 8) dmax = dmax - 2048.; |
---|
4223 | |
---|
4224 | imap = (unsigned long)((vertex->rgba[0]) * dmax); |
---|
4225 | offs += (*action)(imap, 1); |
---|
4226 | |
---|
4227 | imap = (unsigned long)((vertex->rgba[1]) * dmax); |
---|
4228 | offs += (*action)(imap, 1); |
---|
4229 | |
---|
4230 | imap = (unsigned long)((vertex->rgba[2]) * dmax); |
---|
4231 | offs += (*action)(imap, 1); |
---|
4232 | |
---|
4233 | return offs; |
---|
4234 | } |
---|
4235 | |
---|
4236 | /* Put vertex' alpha (8/16bit) in shader stream */ |
---|
4237 | |
---|
4238 | static int gl2psPrintPDFShaderStreamDataAlpha(GL2PSvertex *vertex, |
---|
4239 | size_t (*action)(unsigned long data, |
---|
4240 | size_t size), |
---|
4241 | int sigbyte) |
---|
4242 | { |
---|
4243 | int offs = 0; |
---|
4244 | unsigned long imap; |
---|
4245 | double dmax = ~1UL; |
---|
4246 | |
---|
4247 | /* FIXME: temp bux fix for 64 bit archs: */ |
---|
4248 | if(sizeof(unsigned long) == 8) dmax = dmax - 2048.; |
---|
4249 | |
---|
4250 | if(sigbyte != 8 && sigbyte != 16) |
---|
4251 | sigbyte = 8; |
---|
4252 | |
---|
4253 | sigbyte /= 8; |
---|
4254 | |
---|
4255 | imap = (unsigned long)((vertex->rgba[3]) * dmax); |
---|
4256 | |
---|
4257 | offs += (*action)(imap, sigbyte); |
---|
4258 | |
---|
4259 | return offs; |
---|
4260 | } |
---|
4261 | |
---|
4262 | /* Put a triangles raw data in shader stream */ |
---|
4263 | |
---|
4264 | static int gl2psPrintPDFShaderStreamData(GL2PStriangle *triangle, |
---|
4265 | GLfloat dx, GLfloat dy, |
---|
4266 | GLfloat xmin, GLfloat ymin, |
---|
4267 | size_t (*action)(unsigned long data, |
---|
4268 | size_t size), |
---|
4269 | int gray) |
---|
4270 | { |
---|
4271 | int i, offs = 0; |
---|
4272 | GL2PSvertex v; |
---|
4273 | |
---|
4274 | if(gray && gray != 8 && gray != 16) |
---|
4275 | gray = 8; |
---|
4276 | |
---|
4277 | for(i = 0; i < 3; ++i){ |
---|
4278 | offs += gl2psPrintPDFShaderStreamDataCoord(&triangle->vertex[i], action, |
---|
4279 | dx, dy, xmin, ymin); |
---|
4280 | if(gray){ |
---|
4281 | v = triangle->vertex[i]; |
---|
4282 | offs += gl2psPrintPDFShaderStreamDataAlpha(&v, action, gray); |
---|
4283 | } |
---|
4284 | else{ |
---|
4285 | offs += gl2psPrintPDFShaderStreamDataRGB(&triangle->vertex[i], action); |
---|
4286 | } |
---|
4287 | } |
---|
4288 | |
---|
4289 | return offs; |
---|
4290 | } |
---|
4291 | |
---|
4292 | static void gl2psPDFRectHull(GLfloat *xmin, GLfloat *xmax, |
---|
4293 | GLfloat *ymin, GLfloat *ymax, |
---|
4294 | GL2PStriangle *triangles, int cnt) |
---|
4295 | { |
---|
4296 | int i, j; |
---|
4297 | |
---|
4298 | *xmin = triangles[0].vertex[0].xyz[0]; |
---|
4299 | *xmax = triangles[0].vertex[0].xyz[0]; |
---|
4300 | *ymin = triangles[0].vertex[0].xyz[1]; |
---|
4301 | *ymax = triangles[0].vertex[0].xyz[1]; |
---|
4302 | |
---|
4303 | for(i = 0; i < cnt; ++i){ |
---|
4304 | for(j = 0; j < 3; ++j){ |
---|
4305 | if(*xmin > triangles[i].vertex[j].xyz[0]) |
---|
4306 | *xmin = triangles[i].vertex[j].xyz[0]; |
---|
4307 | if(*xmax < triangles[i].vertex[j].xyz[0]) |
---|
4308 | *xmax = triangles[i].vertex[j].xyz[0]; |
---|
4309 | if(*ymin > triangles[i].vertex[j].xyz[1]) |
---|
4310 | *ymin = triangles[i].vertex[j].xyz[1]; |
---|
4311 | if(*ymax < triangles[i].vertex[j].xyz[1]) |
---|
4312 | *ymax = triangles[i].vertex[j].xyz[1]; |
---|
4313 | } |
---|
4314 | } |
---|
4315 | } |
---|
4316 | |
---|
4317 | /* Writes shaded triangle |
---|
4318 | gray == 0 means write RGB triangles |
---|
4319 | gray == 8 8bit-grayscale (for alpha masks) |
---|
4320 | gray == 16 16bit-grayscale (for alpha masks) */ |
---|
4321 | |
---|
4322 | static int gl2psPrintPDFShader(int obj, GL2PStriangle *triangles, |
---|
4323 | int size, int gray) |
---|
4324 | { |
---|
4325 | int i, offs = 0, vertexbytes, done = 0; |
---|
4326 | GLfloat xmin, xmax, ymin, ymax; |
---|
4327 | |
---|
4328 | switch(gray){ |
---|
4329 | case 0: |
---|
4330 | vertexbytes = 1+4+4+1+1+1; |
---|
4331 | break; |
---|
4332 | case 8: |
---|
4333 | vertexbytes = 1+4+4+1; |
---|
4334 | break; |
---|
4335 | case 16: |
---|
4336 | vertexbytes = 1+4+4+2; |
---|
4337 | break; |
---|
4338 | default: |
---|
4339 | gray = 8; |
---|
4340 | vertexbytes = 1+4+4+1; |
---|
4341 | break; |
---|
4342 | } |
---|
4343 | |
---|
4344 | gl2psPDFRectHull(&xmin, &xmax, &ymin, &ymax, triangles, size); |
---|
4345 | |
---|
4346 | offs += fprintf(gl2ps->stream, |
---|
4347 | "%d 0 obj\n" |
---|
4348 | "<< " |
---|
4349 | "/ShadingType 4 " |
---|
4350 | "/ColorSpace %s " |
---|
4351 | "/BitsPerCoordinate 32 " |
---|
4352 | "/BitsPerComponent %d " |
---|
4353 | "/BitsPerFlag 8 " |
---|
4354 | "/Decode [%f %f %f %f 0 1 %s] ", |
---|
4355 | obj, |
---|
4356 | (gray) ? "/DeviceGray" : "/DeviceRGB", |
---|
4357 | (gray) ? gray : 8, |
---|
4358 | xmin, xmax, ymin, ymax, |
---|
4359 | (gray) ? "" : "0 1 0 1"); |
---|
4360 | |
---|
4361 | #if defined(GL2PS_HAVE_ZLIB) |
---|
4362 | if(gl2ps->options & GL2PS_COMPRESS){ |
---|
4363 | gl2psAllocCompress(vertexbytes * size * 3); |
---|
4364 | |
---|
4365 | for(i = 0; i < size; ++i) |
---|
4366 | gl2psPrintPDFShaderStreamData(&triangles[i], |
---|
4367 | xmax-xmin, ymax-ymin, xmin, ymin, |
---|
4368 | gl2psWriteBigEndianCompress, gray); |
---|
4369 | |
---|
4370 | if(Z_OK == gl2psDeflate() && 23 + gl2ps->compress->destLen < gl2ps->compress->srcLen){ |
---|
4371 | offs += gl2psPrintPDFCompressorType(); |
---|
4372 | offs += fprintf(gl2ps->stream, |
---|
4373 | "/Length %d " |
---|
4374 | ">>\n" |
---|
4375 | "stream\n", |
---|
4376 | (int)gl2ps->compress->destLen); |
---|
4377 | offs += gl2ps->compress->destLen * fwrite(gl2ps->compress->dest, |
---|
4378 | gl2ps->compress->destLen, |
---|
4379 | 1, gl2ps->stream); |
---|
4380 | done = 1; |
---|
4381 | } |
---|
4382 | gl2psFreeCompress(); |
---|
4383 | } |
---|
4384 | #endif |
---|
4385 | |
---|
4386 | if(!done){ |
---|
4387 | /* no compression, or too long after compression, or compress error |
---|
4388 | -> write non-compressed entry */ |
---|
4389 | offs += fprintf(gl2ps->stream, |
---|
4390 | "/Length %d " |
---|
4391 | ">>\n" |
---|
4392 | "stream\n", |
---|
4393 | vertexbytes * 3 * size); |
---|
4394 | for(i = 0; i < size; ++i) |
---|
4395 | offs += gl2psPrintPDFShaderStreamData(&triangles[i], |
---|
4396 | xmax-xmin, ymax-ymin, xmin, ymin, |
---|
4397 | gl2psWriteBigEndian, gray); |
---|
4398 | } |
---|
4399 | |
---|
4400 | offs += fprintf(gl2ps->stream, |
---|
4401 | "\nendstream\n" |
---|
4402 | "endobj\n"); |
---|
4403 | |
---|
4404 | return offs; |
---|
4405 | } |
---|
4406 | |
---|
4407 | /* Writes a XObject for a shaded triangle mask */ |
---|
4408 | |
---|
4409 | static int gl2psPrintPDFShaderMask(int obj, int childobj) |
---|
4410 | { |
---|
4411 | int offs = 0, len; |
---|
4412 | |
---|
4413 | offs += fprintf(gl2ps->stream, |
---|
4414 | "%d 0 obj\n" |
---|
4415 | "<<\n" |
---|
4416 | "/Type /XObject\n" |
---|
4417 | "/Subtype /Form\n" |
---|
4418 | "/BBox [ %d %d %d %d ]\n" |
---|
4419 | "/Group \n<<\n/S /Transparency /CS /DeviceRGB\n" |
---|
4420 | ">>\n", |
---|
4421 | obj, |
---|
4422 | (int)gl2ps->viewport[0], (int)gl2ps->viewport[1], |
---|
4423 | (int)gl2ps->viewport[2], (int)gl2ps->viewport[3]); |
---|
4424 | |
---|
4425 | len = (childobj>0) |
---|
4426 | ? strlen("/TrSh sh\n") + (int)log10((double)childobj)+1 |
---|
4427 | : strlen("/TrSh0 sh\n"); |
---|
4428 | |
---|
4429 | offs += fprintf(gl2ps->stream, |
---|
4430 | "/Length %d\n" |
---|
4431 | ">>\n" |
---|
4432 | "stream\n", |
---|
4433 | len); |
---|
4434 | offs += fprintf(gl2ps->stream, |
---|
4435 | "/TrSh%d sh\n", |
---|
4436 | childobj); |
---|
4437 | offs += fprintf(gl2ps->stream, |
---|
4438 | "endstream\n" |
---|
4439 | "endobj\n"); |
---|
4440 | |
---|
4441 | return offs; |
---|
4442 | } |
---|
4443 | |
---|
4444 | /* Writes a Extended graphics state for a shaded triangle mask if |
---|
4445 | simplealpha ist true the childobj argument is ignored and a /ca |
---|
4446 | statement will be written instead */ |
---|
4447 | |
---|
4448 | static int gl2psPrintPDFShaderExtGS(int obj, int childobj) |
---|
4449 | { |
---|
4450 | int offs = 0; |
---|
4451 | |
---|
4452 | offs += fprintf(gl2ps->stream, |
---|
4453 | "%d 0 obj\n" |
---|
4454 | "<<\n", |
---|
4455 | obj); |
---|
4456 | |
---|
4457 | offs += fprintf(gl2ps->stream, |
---|
4458 | "/SMask << /S /Alpha /G %d 0 R >> ", |
---|
4459 | childobj); |
---|
4460 | |
---|
4461 | offs += fprintf(gl2ps->stream, |
---|
4462 | ">>\n" |
---|
4463 | "endobj\n"); |
---|
4464 | return offs; |
---|
4465 | } |
---|
4466 | |
---|
4467 | /* a simple graphics state */ |
---|
4468 | |
---|
4469 | static int gl2psPrintPDFShaderSimpleExtGS(int obj, GLfloat alpha) |
---|
4470 | { |
---|
4471 | int offs = 0; |
---|
4472 | |
---|
4473 | offs += fprintf(gl2ps->stream, |
---|
4474 | "%d 0 obj\n" |
---|
4475 | "<<\n" |
---|
4476 | "/ca %g" |
---|
4477 | ">>\n" |
---|
4478 | "endobj\n", |
---|
4479 | obj, alpha); |
---|
4480 | return offs; |
---|
4481 | } |
---|
4482 | |
---|
4483 | /* Similar groups of functions for pixmaps and text */ |
---|
4484 | |
---|
4485 | static int gl2psPrintPDFPixmapStreamData(GL2PSimage *im, |
---|
4486 | size_t (*action)(unsigned long data, |
---|
4487 | size_t size), |
---|
4488 | int gray) |
---|
4489 | { |
---|
4490 | int x, y, shift; |
---|
4491 | GLfloat r, g, b, a; |
---|
4492 | |
---|
4493 | if(im->format != GL_RGBA && gray) |
---|
4494 | return 0; |
---|
4495 | |
---|
4496 | if(gray && gray != 8 && gray != 16) |
---|
4497 | gray = 8; |
---|
4498 | |
---|
4499 | gray /= 8; |
---|
4500 | |
---|
4501 | shift = (sizeof(unsigned long) - 1) * 8; |
---|
4502 | |
---|
4503 | for(y = 0; y < im->height; ++y){ |
---|
4504 | for(x = 0; x < im->width; ++x){ |
---|
4505 | a = gl2psGetRGB(im, x, y, &r, &g, &b); |
---|
4506 | if(im->format == GL_RGBA && gray){ |
---|
4507 | (*action)((unsigned long)(a * 255) << shift, gray); |
---|
4508 | } |
---|
4509 | else{ |
---|
4510 | (*action)((unsigned long)(r * 255) << shift, 1); |
---|
4511 | (*action)((unsigned long)(g * 255) << shift, 1); |
---|
4512 | (*action)((unsigned long)(b * 255) << shift, 1); |
---|
4513 | } |
---|
4514 | } |
---|
4515 | } |
---|
4516 | |
---|
4517 | switch(gray){ |
---|
4518 | case 0: return 3 * im->width * im->height; |
---|
4519 | case 1: return im->width * im->height; |
---|
4520 | case 2: return 2 * im->width * im->height; |
---|
4521 | default: return 3 * im->width * im->height; |
---|
4522 | } |
---|
4523 | } |
---|
4524 | |
---|
4525 | static int gl2psPrintPDFPixmap(int obj, int childobj, GL2PSimage *im, int gray) |
---|
4526 | { |
---|
4527 | int offs = 0, done = 0, sigbytes = 3; |
---|
4528 | |
---|
4529 | if(gray && gray !=8 && gray != 16) |
---|
4530 | gray = 8; |
---|
4531 | |
---|
4532 | if(gray) |
---|
4533 | sigbytes = gray / 8; |
---|
4534 | |
---|
4535 | offs += fprintf(gl2ps->stream, |
---|
4536 | "%d 0 obj\n" |
---|
4537 | "<<\n" |
---|
4538 | "/Type /XObject\n" |
---|
4539 | "/Subtype /Image\n" |
---|
4540 | "/Width %d\n" |
---|
4541 | "/Height %d\n" |
---|
4542 | "/ColorSpace %s \n" |
---|
4543 | "/BitsPerComponent 8\n", |
---|
4544 | obj, |
---|
4545 | (int)im->width, (int)im->height, |
---|
4546 | (gray) ? "/DeviceGray" : "/DeviceRGB" ); |
---|
4547 | if(GL_RGBA == im->format && gray == 0){ |
---|
4548 | offs += fprintf(gl2ps->stream, |
---|
4549 | "/SMask %d 0 R\n", |
---|
4550 | childobj); |
---|
4551 | } |
---|
4552 | |
---|
4553 | #if defined(GL2PS_HAVE_ZLIB) |
---|
4554 | if(gl2ps->options & GL2PS_COMPRESS){ |
---|
4555 | gl2psAllocCompress((int)(im->width * im->height * sigbytes)); |
---|
4556 | |
---|
4557 | gl2psPrintPDFPixmapStreamData(im, gl2psWriteBigEndianCompress, gray); |
---|
4558 | |
---|
4559 | if(Z_OK == gl2psDeflate() && 23 + gl2ps->compress->destLen < gl2ps->compress->srcLen){ |
---|
4560 | offs += gl2psPrintPDFCompressorType(); |
---|
4561 | offs += fprintf(gl2ps->stream, |
---|
4562 | "/Length %d " |
---|
4563 | ">>\n" |
---|
4564 | "stream\n", |
---|
4565 | (int)gl2ps->compress->destLen); |
---|
4566 | offs += gl2ps->compress->destLen * fwrite(gl2ps->compress->dest, gl2ps->compress->destLen, |
---|
4567 | 1, gl2ps->stream); |
---|
4568 | done = 1; |
---|
4569 | } |
---|
4570 | gl2psFreeCompress(); |
---|
4571 | } |
---|
4572 | #endif |
---|
4573 | |
---|
4574 | if(!done){ |
---|
4575 | /* no compression, or too long after compression, or compress error |
---|
4576 | -> write non-compressed entry */ |
---|
4577 | offs += fprintf(gl2ps->stream, |
---|
4578 | "/Length %d " |
---|
4579 | ">>\n" |
---|
4580 | "stream\n", |
---|
4581 | (int)(im->width * im->height * sigbytes)); |
---|
4582 | offs += gl2psPrintPDFPixmapStreamData(im, gl2psWriteBigEndian, gray); |
---|
4583 | } |
---|
4584 | |
---|
4585 | offs += fprintf(gl2ps->stream, |
---|
4586 | "\nendstream\n" |
---|
4587 | "endobj\n"); |
---|
4588 | |
---|
4589 | return offs; |
---|
4590 | } |
---|
4591 | |
---|
4592 | static int gl2psPrintPDFText(int obj, GL2PSstring *s, int fontnumber) |
---|
4593 | { |
---|
4594 | int offs = 0; |
---|
4595 | |
---|
4596 | offs += fprintf(gl2ps->stream, |
---|
4597 | "%d 0 obj\n" |
---|
4598 | "<<\n" |
---|
4599 | "/Type /Font\n" |
---|
4600 | "/Subtype /Type1\n" |
---|
4601 | "/Name /F%d\n" |
---|
4602 | "/BaseFont /%s\n" |
---|
4603 | "/Encoding /MacRomanEncoding\n" |
---|
4604 | ">>\n" |
---|
4605 | "endobj\n", |
---|
4606 | obj, fontnumber, s->fontname); |
---|
4607 | return offs; |
---|
4608 | } |
---|
4609 | |
---|
4610 | /* Write the physical objects */ |
---|
4611 | |
---|
4612 | static int gl2psPDFgroupListWriteObjects(int entryoffs) |
---|
4613 | { |
---|
4614 | int i,j; |
---|
4615 | GL2PSprimitive *p = NULL; |
---|
4616 | GL2PSpdfgroup *gro; |
---|
4617 | int offs = entryoffs; |
---|
4618 | GL2PStriangle *triangles; |
---|
4619 | int size = 0; |
---|
4620 | |
---|
4621 | if(!gl2ps->pdfgrouplist) |
---|
4622 | return offs; |
---|
4623 | |
---|
4624 | for(i = 0; i < gl2psListNbr(gl2ps->pdfgrouplist); ++i){ |
---|
4625 | gro = (GL2PSpdfgroup*)gl2psListPointer(gl2ps->pdfgrouplist, i); |
---|
4626 | if(!gl2psListNbr(gro->ptrlist)) |
---|
4627 | continue; |
---|
4628 | p = *(GL2PSprimitive**)gl2psListPointer(gro->ptrlist, 0); |
---|
4629 | switch(p->type){ |
---|
4630 | case GL2PS_POINT: |
---|
4631 | break; |
---|
4632 | case GL2PS_LINE: |
---|
4633 | break; |
---|
4634 | case GL2PS_TRIANGLE: |
---|
4635 | size = gl2psListNbr(gro->ptrlist); |
---|
4636 | triangles = (GL2PStriangle*)gl2psMalloc(sizeof(GL2PStriangle) * size); |
---|
4637 | for(j = 0; j < size; ++j){ |
---|
4638 | p = *(GL2PSprimitive**)gl2psListPointer(gro->ptrlist, j); |
---|
4639 | gl2psFillTriangleFromPrimitive(&triangles[j], p, GL_TRUE); |
---|
4640 | } |
---|
4641 | if(triangles[0].prop & T_VAR_COLOR){ |
---|
4642 | gl2ps->xreflist[gro->shobjno] = offs; |
---|
4643 | offs += gl2psPrintPDFShader(gro->shobjno, triangles, size, 0); |
---|
4644 | } |
---|
4645 | if(triangles[0].prop & T_ALPHA_LESS_1){ |
---|
4646 | gl2ps->xreflist[gro->gsobjno] = offs; |
---|
4647 | offs += gl2psPrintPDFShaderSimpleExtGS(gro->gsobjno, triangles[0].vertex[0].rgba[3]); |
---|
4648 | } |
---|
4649 | if(triangles[0].prop & T_VAR_ALPHA){ |
---|
4650 | gl2ps->xreflist[gro->gsobjno] = offs; |
---|
4651 | offs += gl2psPrintPDFShaderExtGS(gro->gsobjno, gro->trgroupobjno); |
---|
4652 | gl2ps->xreflist[gro->trgroupobjno] = offs; |
---|
4653 | offs += gl2psPrintPDFShaderMask(gro->trgroupobjno, gro->maskshno); |
---|
4654 | gl2ps->xreflist[gro->maskshobjno] = offs; |
---|
4655 | offs += gl2psPrintPDFShader(gro->maskshobjno, triangles, size, 8); |
---|
4656 | } |
---|
4657 | gl2psFree(triangles); |
---|
4658 | break; |
---|
4659 | case GL2PS_PIXMAP: |
---|
4660 | gl2ps->xreflist[gro->imobjno] = offs; |
---|
4661 | offs += gl2psPrintPDFPixmap(gro->imobjno, gro->imobjno+1, p->data.image, 0); |
---|
4662 | if(p->data.image->format == GL_RGBA){ |
---|
4663 | gl2ps->xreflist[gro->imobjno+1] = offs; |
---|
4664 | offs += gl2psPrintPDFPixmap(gro->imobjno+1, -1, p->data.image, 8); |
---|
4665 | } |
---|
4666 | break; |
---|
4667 | case GL2PS_TEXT: |
---|
4668 | gl2ps->xreflist[gro->fontobjno] = offs; |
---|
4669 | offs += gl2psPrintPDFText(gro->fontobjno,p->data.text,gro->fontno); |
---|
4670 | break; |
---|
4671 | case GL2PS_SPECIAL : |
---|
4672 | /* alignment contains the format for which the special output text |
---|
4673 | is intended */ |
---|
4674 | if(p->data.text->alignment == GL2PS_PDF) |
---|
4675 | offs += fprintf(gl2ps->stream, "%s\n", p->data.text->str); |
---|
4676 | break; |
---|
4677 | default: |
---|
4678 | break; |
---|
4679 | } |
---|
4680 | } |
---|
4681 | return offs; |
---|
4682 | } |
---|
4683 | |
---|
4684 | /* All variable data has been written at this point and all required |
---|
4685 | functioninality has been gathered, so we can write now file footer |
---|
4686 | with cross reference table and trailer */ |
---|
4687 | |
---|
4688 | static void gl2psPrintPDFFooter(void) |
---|
4689 | { |
---|
4690 | int i, offs; |
---|
4691 | |
---|
4692 | gl2psPDFgroupListInit(); |
---|
4693 | gl2psPDFgroupListWriteMainStream(); |
---|
4694 | |
---|
4695 | offs = gl2ps->xreflist[5] + gl2ps->streamlength; |
---|
4696 | offs += gl2psClosePDFDataStream(); |
---|
4697 | gl2ps->xreflist[5] = offs; |
---|
4698 | |
---|
4699 | offs += gl2psPrintPDFDataStreamLength(gl2ps->streamlength); |
---|
4700 | gl2ps->xreflist[6] = offs; |
---|
4701 | gl2ps->streamlength = 0; |
---|
4702 | |
---|
4703 | offs += gl2psPrintPDFOpenPage(); |
---|
4704 | offs += gl2psPDFgroupListWriteVariableResources(); |
---|
4705 | gl2ps->xreflist = (int*)gl2psRealloc(gl2ps->xreflist, |
---|
4706 | sizeof(int) * (gl2ps->objects_stack + 1)); |
---|
4707 | gl2ps->xreflist[7] = offs; |
---|
4708 | |
---|
4709 | offs += gl2psPrintPDFGSObject(); |
---|
4710 | gl2ps->xreflist[8] = offs; |
---|
4711 | |
---|
4712 | gl2ps->xreflist[gl2ps->objects_stack] = |
---|
4713 | gl2psPDFgroupListWriteObjects(gl2ps->xreflist[8]); |
---|
4714 | |
---|
4715 | /* Start cross reference table. The file has to been opened in |
---|
4716 | binary mode to preserve the 20 digit string length! */ |
---|
4717 | fprintf(gl2ps->stream, |
---|
4718 | "xref\n" |
---|
4719 | "0 %d\n" |
---|
4720 | "%010d 65535 f \n", gl2ps->objects_stack, 0); |
---|
4721 | |
---|
4722 | for(i = 1; i < gl2ps->objects_stack; ++i) |
---|
4723 | fprintf(gl2ps->stream, "%010d 00000 n \n", gl2ps->xreflist[i]); |
---|
4724 | |
---|
4725 | fprintf(gl2ps->stream, |
---|
4726 | "trailer\n" |
---|
4727 | "<<\n" |
---|
4728 | "/Size %d\n" |
---|
4729 | "/Info 1 0 R\n" |
---|
4730 | "/Root 2 0 R\n" |
---|
4731 | ">>\n" |
---|
4732 | "startxref\n%d\n" |
---|
4733 | "%%%%EOF\n", |
---|
4734 | gl2ps->objects_stack, gl2ps->xreflist[gl2ps->objects_stack]); |
---|
4735 | |
---|
4736 | /* Free auxiliary lists and arrays */ |
---|
4737 | gl2psFree(gl2ps->xreflist); |
---|
4738 | gl2psListAction(gl2ps->pdfprimlist, gl2psFreePrimitive); |
---|
4739 | gl2psListDelete(gl2ps->pdfprimlist); |
---|
4740 | gl2psPDFgroupListDelete(); |
---|
4741 | |
---|
4742 | #if defined(GL2PS_HAVE_ZLIB) |
---|
4743 | if(gl2ps->options & GL2PS_COMPRESS){ |
---|
4744 | gl2psFreeCompress(); |
---|
4745 | gl2psFree(gl2ps->compress); |
---|
4746 | gl2ps->compress = NULL; |
---|
4747 | } |
---|
4748 | #endif |
---|
4749 | } |
---|
4750 | |
---|
4751 | /* PDF begin viewport */ |
---|
4752 | |
---|
4753 | static void gl2psPrintPDFBeginViewport(GLint viewport[4]) |
---|
4754 | { |
---|
4755 | int offs = 0; |
---|
4756 | GLint index; |
---|
4757 | GLfloat rgba[4]; |
---|
4758 | int x = viewport[0], y = viewport[1], w = viewport[2], h = viewport[3]; |
---|
4759 | |
---|
4760 | glRenderMode(GL_FEEDBACK); |
---|
4761 | |
---|
4762 | if(gl2ps->header){ |
---|
4763 | gl2psPrintPDFHeader(); |
---|
4764 | gl2ps->header = GL_FALSE; |
---|
4765 | } |
---|
4766 | |
---|
4767 | offs += gl2psPrintf("q\n"); |
---|
4768 | |
---|
4769 | if(gl2ps->options & GL2PS_DRAW_BACKGROUND){ |
---|
4770 | if(gl2ps->colormode == GL_RGBA || gl2ps->colorsize == 0){ |
---|
4771 | glGetFloatv(GL_COLOR_CLEAR_VALUE, rgba); |
---|
4772 | } |
---|
4773 | else{ |
---|
4774 | glGetIntegerv(GL_INDEX_CLEAR_VALUE, &index); |
---|
4775 | rgba[0] = gl2ps->colormap[index][0]; |
---|
4776 | rgba[1] = gl2ps->colormap[index][1]; |
---|
4777 | rgba[2] = gl2ps->colormap[index][2]; |
---|
4778 | rgba[3] = 1.0F; |
---|
4779 | } |
---|
4780 | offs += gl2psPrintPDFFillColor(rgba); |
---|
4781 | offs += gl2psPrintf("%d %d %d %d re\n" |
---|
4782 | "W\n" |
---|
4783 | "f\n", |
---|
4784 | x, y, w, h); |
---|
4785 | } |
---|
4786 | else{ |
---|
4787 | offs += gl2psPrintf("%d %d %d %d re\n" |
---|
4788 | "W\n" |
---|
4789 | "n\n", |
---|
4790 | x, y, w, h); |
---|
4791 | } |
---|
4792 | |
---|
4793 | gl2ps->streamlength += offs; |
---|
4794 | } |
---|
4795 | |
---|
4796 | static GLint gl2psPrintPDFEndViewport(void) |
---|
4797 | { |
---|
4798 | GLint res; |
---|
4799 | |
---|
4800 | res = gl2psPrintPrimitives(); |
---|
4801 | gl2ps->streamlength += gl2psPrintf("Q\n"); |
---|
4802 | return res; |
---|
4803 | } |
---|
4804 | |
---|
4805 | static void gl2psPrintPDFFinalPrimitive(void) |
---|
4806 | { |
---|
4807 | } |
---|
4808 | |
---|
4809 | /* definition of the PDF backend */ |
---|
4810 | |
---|
4811 | static GL2PSbackend gl2psPDF = { |
---|
4812 | gl2psPrintPDFHeader, |
---|
4813 | gl2psPrintPDFFooter, |
---|
4814 | gl2psPrintPDFBeginViewport, |
---|
4815 | gl2psPrintPDFEndViewport, |
---|
4816 | gl2psPrintPDFPrimitive, |
---|
4817 | gl2psPrintPDFFinalPrimitive, |
---|
4818 | "pdf", |
---|
4819 | "Portable Document Format" |
---|
4820 | }; |
---|
4821 | |
---|
4822 | /********************************************************************* |
---|
4823 | * |
---|
4824 | * SVG routines |
---|
4825 | * |
---|
4826 | *********************************************************************/ |
---|
4827 | |
---|
4828 | static void gl2psSVGGetCoordsAndColors(int n, GL2PSvertex *verts, |
---|
4829 | GL2PSxyz *xyz, GL2PSrgba *rgba) |
---|
4830 | { |
---|
4831 | int i, j; |
---|
4832 | |
---|
4833 | for(i = 0; i < n; i++){ |
---|
4834 | xyz[i][0] = verts[i].xyz[0]; |
---|
4835 | xyz[i][1] = gl2ps->viewport[3] - verts[i].xyz[1]; |
---|
4836 | xyz[i][2] = 0.0F; |
---|
4837 | for(j = 0; j < 4; j++) |
---|
4838 | rgba[i][j] = verts[i].rgba[j]; |
---|
4839 | } |
---|
4840 | } |
---|
4841 | |
---|
4842 | static void gl2psSVGGetColorString(GL2PSrgba rgba, char str[32]) |
---|
4843 | { |
---|
4844 | int r = (int)(255. * rgba[0]); |
---|
4845 | int g = (int)(255. * rgba[1]); |
---|
4846 | int b = (int)(255. * rgba[2]); |
---|
4847 | int rc = (r < 0) ? 0 : (r > 255) ? 255 : r; |
---|
4848 | int gc = (g < 0) ? 0 : (g > 255) ? 255 : g; |
---|
4849 | int bc = (b < 0) ? 0 : (b > 255) ? 255 : b; |
---|
4850 | sprintf(str, "#%2.2x%2.2x%2.2x", rc, gc, bc); |
---|
4851 | } |
---|
4852 | |
---|
4853 | static void gl2psPrintSVGHeader(void) |
---|
4854 | { |
---|
4855 | int x, y, width, height; |
---|
4856 | char col[32]; |
---|
4857 | time_t now; |
---|
4858 | |
---|
4859 | time(&now); |
---|
4860 | |
---|
4861 | if (gl2ps->options & GL2PS_LANDSCAPE){ |
---|
4862 | x = (int)gl2ps->viewport[1]; |
---|
4863 | y = (int)gl2ps->viewport[0]; |
---|
4864 | width = (int)gl2ps->viewport[3]; |
---|
4865 | height = (int)gl2ps->viewport[2]; |
---|
4866 | } |
---|
4867 | else{ |
---|
4868 | x = (int)gl2ps->viewport[0]; |
---|
4869 | y = (int)gl2ps->viewport[1]; |
---|
4870 | width = (int)gl2ps->viewport[2]; |
---|
4871 | height = (int)gl2ps->viewport[3]; |
---|
4872 | } |
---|
4873 | |
---|
4874 | /* Compressed SVG files (.svgz) are simply gzipped SVG files */ |
---|
4875 | gl2psPrintGzipHeader(); |
---|
4876 | |
---|
4877 | gl2psPrintf("<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?>\n"); |
---|
4878 | gl2psPrintf("<svg xmlns=\"http://www.w3.org/2000/svg\"\n"); |
---|
4879 | gl2psPrintf(" xmlns:xlink=\"http://www.w3.org/1999/xlink\"\n" |
---|
4880 | " width=\"%dpx\" height=\"%dpx\" viewBox=\"%d %d %d %d\">\n", |
---|
4881 | width, height, x, y, width, height); |
---|
4882 | gl2psPrintf("<title>%s</title>\n", gl2ps->title); |
---|
4883 | gl2psPrintf("<desc>\n"); |
---|
4884 | gl2psPrintf("Creator: GL2PS %d.%d.%d%s, %s\n" |
---|
4885 | "For: %s\n" |
---|
4886 | "CreationDate: %s", |
---|
4887 | GL2PS_MAJOR_VERSION, GL2PS_MINOR_VERSION, GL2PS_PATCH_VERSION, |
---|
4888 | GL2PS_EXTRA_VERSION, GL2PS_COPYRIGHT, gl2ps->producer, ctime(&now)); |
---|
4889 | gl2psPrintf("</desc>\n"); |
---|
4890 | gl2psPrintf("<defs>\n"); |
---|
4891 | gl2psPrintf("</defs>\n"); |
---|
4892 | |
---|
4893 | if(gl2ps->options & GL2PS_DRAW_BACKGROUND){ |
---|
4894 | gl2psSVGGetColorString(gl2ps->bgcolor, col); |
---|
4895 | gl2psPrintf("<polygon fill=\"%s\" points=\"%d,%d %d,%d %d,%d %d,%d\"/>\n", col, |
---|
4896 | (int)gl2ps->viewport[0], (int)gl2ps->viewport[1], |
---|
4897 | (int)gl2ps->viewport[2], (int)gl2ps->viewport[1], |
---|
4898 | (int)gl2ps->viewport[2], (int)gl2ps->viewport[3], |
---|
4899 | (int)gl2ps->viewport[0], (int)gl2ps->viewport[3]); |
---|
4900 | } |
---|
4901 | |
---|
4902 | /* group all the primitives and disable antialiasing */ |
---|
4903 | gl2psPrintf("<g shape-rendering=\"crispEdges\">\n"); |
---|
4904 | } |
---|
4905 | |
---|
4906 | static void gl2psPrintSVGSmoothTriangle(GL2PSxyz xyz[3], GL2PSrgba rgba[3]) |
---|
4907 | { |
---|
4908 | int i; |
---|
4909 | GL2PSxyz xyz2[3]; |
---|
4910 | GL2PSrgba rgba2[3]; |
---|
4911 | char col[32]; |
---|
4912 | |
---|
4913 | /* Apparently there is no easy way to do Gouraud shading in SVG |
---|
4914 | without explicitly pre-defining gradients, so for now we just do |
---|
4915 | recursive subdivision */ |
---|
4916 | |
---|
4917 | if(gl2psSameColorThreshold(3, rgba, gl2ps->threshold)){ |
---|
4918 | gl2psSVGGetColorString(rgba[0], col); |
---|
4919 | gl2psPrintf("<polygon fill=\"%s\" ", col); |
---|
4920 | if(rgba[0][3] < 1.0F) gl2psPrintf("fill-opacity=\"%g\" ", rgba[0][3]); |
---|
4921 | gl2psPrintf("points=\"%g,%g %g,%g %g,%g\"/>\n", xyz[0][0], xyz[0][1], |
---|
4922 | xyz[1][0], xyz[1][1], xyz[2][0], xyz[2][1]); |
---|
4923 | } |
---|
4924 | else{ |
---|
4925 | /* subdivide into 4 subtriangles */ |
---|
4926 | for(i = 0; i < 3; i++){ |
---|
4927 | xyz2[0][i] = xyz[0][i]; |
---|
4928 | xyz2[1][i] = 0.5F * (xyz[0][i] + xyz[1][i]); |
---|
4929 | xyz2[2][i] = 0.5F * (xyz[0][i] + xyz[2][i]); |
---|
4930 | } |
---|
4931 | for(i = 0; i < 4; i++){ |
---|
4932 | rgba2[0][i] = rgba[0][i]; |
---|
4933 | rgba2[1][i] = 0.5F * (rgba[0][i] + rgba[1][i]); |
---|
4934 | rgba2[2][i] = 0.5F * (rgba[0][i] + rgba[2][i]); |
---|
4935 | } |
---|
4936 | gl2psPrintSVGSmoothTriangle(xyz2, rgba2); |
---|
4937 | for(i = 0; i < 3; i++){ |
---|
4938 | xyz2[0][i] = 0.5F * (xyz[0][i] + xyz[1][i]); |
---|
4939 | xyz2[1][i] = xyz[1][i]; |
---|
4940 | xyz2[2][i] = 0.5F * (xyz[1][i] + xyz[2][i]); |
---|
4941 | } |
---|
4942 | for(i = 0; i < 4; i++){ |
---|
4943 | rgba2[0][i] = 0.5F * (rgba[0][i] + rgba[1][i]); |
---|
4944 | rgba2[1][i] = rgba[1][i]; |
---|
4945 | rgba2[2][i] = 0.5F * (rgba[1][i] + rgba[2][i]); |
---|
4946 | } |
---|
4947 | gl2psPrintSVGSmoothTriangle(xyz2, rgba2); |
---|
4948 | for(i = 0; i < 3; i++){ |
---|
4949 | xyz2[0][i] = 0.5F * (xyz[0][i] + xyz[2][i]); |
---|
4950 | xyz2[1][i] = xyz[2][i]; |
---|
4951 | xyz2[2][i] = 0.5F * (xyz[1][i] + xyz[2][i]); |
---|
4952 | } |
---|
4953 | for(i = 0; i < 4; i++){ |
---|
4954 | rgba2[0][i] = 0.5F * (rgba[0][i] + rgba[2][i]); |
---|
4955 | rgba2[1][i] = rgba[2][i]; |
---|
4956 | rgba2[2][i] = 0.5F * (rgba[1][i] + rgba[2][i]); |
---|
4957 | } |
---|
4958 | gl2psPrintSVGSmoothTriangle(xyz2, rgba2); |
---|
4959 | for(i = 0; i < 3; i++){ |
---|
4960 | xyz2[0][i] = 0.5F * (xyz[0][i] + xyz[1][i]); |
---|
4961 | xyz2[1][i] = 0.5F * (xyz[1][i] + xyz[2][i]); |
---|
4962 | xyz2[2][i] = 0.5F * (xyz[0][i] + xyz[2][i]); |
---|
4963 | } |
---|
4964 | for(i = 0; i < 4; i++){ |
---|
4965 | rgba2[0][i] = 0.5F * (rgba[0][i] + rgba[1][i]); |
---|
4966 | rgba2[1][i] = 0.5F * (rgba[1][i] + rgba[2][i]); |
---|
4967 | rgba2[2][i] = 0.5F * (rgba[0][i] + rgba[2][i]); |
---|
4968 | } |
---|
4969 | gl2psPrintSVGSmoothTriangle(xyz2, rgba2); |
---|
4970 | } |
---|
4971 | } |
---|
4972 | |
---|
4973 | static void gl2psPrintSVGDash(GLushort pattern, GLint factor) |
---|
4974 | { |
---|
4975 | int i, n, array[10]; |
---|
4976 | |
---|
4977 | if(!pattern || !factor) return; /* solid line */ |
---|
4978 | |
---|
4979 | gl2psParseStipplePattern(pattern, factor, &n, array); |
---|
4980 | gl2psPrintf("stroke-dasharray=\""); |
---|
4981 | for(i = 0; i < n; i++){ |
---|
4982 | if(i) gl2psPrintf(","); |
---|
4983 | gl2psPrintf("%d", array[i]); |
---|
4984 | } |
---|
4985 | gl2psPrintf("\" "); |
---|
4986 | } |
---|
4987 | |
---|
4988 | static void gl2psEndSVGLine(void) |
---|
4989 | { |
---|
4990 | int i; |
---|
4991 | if(gl2ps->lastvertex.rgba[0] >= 0.){ |
---|
4992 | gl2psPrintf("%g,%g\"/>\n", gl2ps->lastvertex.xyz[0], |
---|
4993 | gl2ps->viewport[3] - gl2ps->lastvertex.xyz[1]); |
---|
4994 | for(i = 0; i < 3; i++) |
---|
4995 | gl2ps->lastvertex.xyz[i] = -1.; |
---|
4996 | for(i = 0; i < 4; i++) |
---|
4997 | gl2ps->lastvertex.rgba[i] = -1.; |
---|
4998 | } |
---|
4999 | } |
---|
5000 | |
---|
5001 | static void gl2psPrintSVGPixmap(GLfloat x, GLfloat y, GL2PSimage *pixmap) |
---|
5002 | { |
---|
5003 | #if defined(GL2PS_HAVE_LIBPNG) |
---|
5004 | GL2PSlist *png; |
---|
5005 | unsigned char c; |
---|
5006 | int i; |
---|
5007 | |
---|
5008 | /* The only image types supported by the SVG standard are JPEG, PNG |
---|
5009 | and SVG. Here we choose PNG, and since we want to embed the image |
---|
5010 | directly in the SVG stream (and not link to an external image |
---|
5011 | file), we need to encode the pixmap into PNG in memory, then |
---|
5012 | encode it into base64. */ |
---|
5013 | |
---|
5014 | png = gl2psListCreate(pixmap->width * pixmap->height * 3, 1000, |
---|
5015 | sizeof(unsigned char)); |
---|
5016 | gl2psConvertPixmapToPNG(pixmap, png); |
---|
5017 | gl2psListEncodeBase64(png); |
---|
5018 | gl2psPrintf("<image x=\"%g\" y=\"%g\" width=\"%d\" height=\"%d\"\n", |
---|
5019 | x, y - pixmap->height, pixmap->width, pixmap->height); |
---|
5020 | gl2psPrintf("xlink:href=\"data:image/png;base64,"); |
---|
5021 | for(i = 0; i < gl2psListNbr(png); i++){ |
---|
5022 | gl2psListRead(png, i, &c); |
---|
5023 | gl2psPrintf("%c", c); |
---|
5024 | } |
---|
5025 | gl2psPrintf("\"/>\n"); |
---|
5026 | gl2psListDelete(png); |
---|
5027 | #else |
---|
5028 | gl2psMsg(GL2PS_WARNING, "GL2PS must be compiled with PNG support in " |
---|
5029 | "order to embed images in SVG streams"); |
---|
5030 | #endif |
---|
5031 | } |
---|
5032 | |
---|
5033 | static void gl2psPrintSVGPrimitive(void *data) |
---|
5034 | { |
---|
5035 | GL2PSprimitive *prim; |
---|
5036 | GL2PSxyz xyz[4]; |
---|
5037 | GL2PSrgba rgba[4]; |
---|
5038 | char col[32]; |
---|
5039 | int newline; |
---|
5040 | |
---|
5041 | prim = *(GL2PSprimitive**)data; |
---|
5042 | |
---|
5043 | if((gl2ps->options & GL2PS_OCCLUSION_CULL) && prim->culled) return; |
---|
5044 | |
---|
5045 | /* We try to draw connected lines as a single path to get nice line |
---|
5046 | joins and correct stippling. So if the primitive to print is not |
---|
5047 | a line we must first finish the current line (if any): */ |
---|
5048 | if(prim->type != GL2PS_LINE) gl2psEndSVGLine(); |
---|
5049 | |
---|
5050 | gl2psSVGGetCoordsAndColors(prim->numverts, prim->verts, xyz, rgba); |
---|
5051 | |
---|
5052 | switch(prim->type){ |
---|
5053 | case GL2PS_POINT : |
---|
5054 | gl2psSVGGetColorString(rgba[0], col); |
---|
5055 | gl2psPrintf("<circle fill=\"%s\" ", col); |
---|
5056 | if(rgba[0][3] < 1.0F) gl2psPrintf("fill-opacity=\"%g\" ", rgba[0][3]); |
---|
5057 | gl2psPrintf("cx=\"%g\" cy=\"%g\" r=\"%g\"/>\n", |
---|
5058 | xyz[0][0], xyz[0][1], 0.5 * prim->width); |
---|
5059 | break; |
---|
5060 | case GL2PS_LINE : |
---|
5061 | if(!gl2psSamePosition(gl2ps->lastvertex.xyz, prim->verts[0].xyz) || |
---|
5062 | !gl2psSameColor(gl2ps->lastrgba, prim->verts[0].rgba) || |
---|
5063 | gl2ps->lastlinewidth != prim->width || |
---|
5064 | gl2ps->lastpattern != prim->pattern || |
---|
5065 | gl2ps->lastfactor != prim->factor){ |
---|
5066 | /* End the current line if the new segment does not start where |
---|
5067 | the last one ended, or if the color, the width or the |
---|
5068 | stippling have changed (we will need to use multi-point |
---|
5069 | gradients for smooth-shaded lines) */ |
---|
5070 | gl2psEndSVGLine(); |
---|
5071 | newline = 1; |
---|
5072 | } |
---|
5073 | else{ |
---|
5074 | newline = 0; |
---|
5075 | } |
---|
5076 | gl2ps->lastvertex = prim->verts[1]; |
---|
5077 | gl2psSetLastColor(prim->verts[0].rgba); |
---|
5078 | gl2ps->lastlinewidth = prim->width; |
---|
5079 | gl2ps->lastpattern = prim->pattern; |
---|
5080 | gl2ps->lastfactor = prim->factor; |
---|
5081 | if(newline){ |
---|
5082 | gl2psSVGGetColorString(rgba[0], col); |
---|
5083 | gl2psPrintf("<polyline fill=\"none\" stroke=\"%s\" stroke-width=\"%g\" ", |
---|
5084 | col, prim->width); |
---|
5085 | if(rgba[0][3] < 1.0F) gl2psPrintf("stroke-opacity=\"%g\" ", rgba[0][3]); |
---|
5086 | gl2psPrintSVGDash(prim->pattern, prim->factor); |
---|
5087 | gl2psPrintf("points=\"%g,%g ", xyz[0][0], xyz[0][1]); |
---|
5088 | } |
---|
5089 | else{ |
---|
5090 | gl2psPrintf("%g,%g ", xyz[0][0], xyz[0][1]); |
---|
5091 | } |
---|
5092 | break; |
---|
5093 | case GL2PS_TRIANGLE : |
---|
5094 | gl2psPrintSVGSmoothTriangle(xyz, rgba); |
---|
5095 | break; |
---|
5096 | case GL2PS_QUADRANGLE : |
---|
5097 | gl2psMsg(GL2PS_WARNING, "There should not be any quad left to print"); |
---|
5098 | break; |
---|
5099 | case GL2PS_PIXMAP : |
---|
5100 | gl2psPrintSVGPixmap(xyz[0][0], xyz[0][1], prim->data.image); |
---|
5101 | break; |
---|
5102 | case GL2PS_TEXT : |
---|
5103 | gl2psSVGGetColorString(prim->verts[0].rgba, col); |
---|
5104 | gl2psPrintf("<text fill=\"%s\" x=\"%g\" y=\"%g\" font-size=\"%d\" ", |
---|
5105 | col, xyz[0][0], xyz[0][1], prim->data.text->fontsize); |
---|
5106 | if(prim->data.text->angle) |
---|
5107 | gl2psPrintf("transform=\"rotate(%g, %g, %g)\" ", |
---|
5108 | -prim->data.text->angle, xyz[0][0], xyz[0][1]); |
---|
5109 | if(!strcmp(prim->data.text->fontname, "Times-Roman")) |
---|
5110 | gl2psPrintf("font-family=\"Times\">"); |
---|
5111 | else if(!strcmp(prim->data.text->fontname, "Times-Bold")) |
---|
5112 | gl2psPrintf("font-family=\"Times\" font-weight=\"bold\">"); |
---|
5113 | else if(!strcmp(prim->data.text->fontname, "Times-Italic")) |
---|
5114 | gl2psPrintf("font-family=\"Times\" font-style=\"italic\">"); |
---|
5115 | else if(!strcmp(prim->data.text->fontname, "Times-BoldItalic")) |
---|
5116 | gl2psPrintf("font-family=\"Times\" font-style=\"italic\" font-weight=\"bold\">"); |
---|
5117 | else if(!strcmp(prim->data.text->fontname, "Helvetica-Bold")) |
---|
5118 | gl2psPrintf("font-family=\"Helvetica\" font-weight=\"bold\">"); |
---|
5119 | else if(!strcmp(prim->data.text->fontname, "Helvetica-Oblique")) |
---|
5120 | gl2psPrintf("font-family=\"Helvetica\" font-style=\"oblique\">"); |
---|
5121 | else if(!strcmp(prim->data.text->fontname, "Helvetica-BoldOblique")) |
---|
5122 | gl2psPrintf("font-family=\"Helvetica\" font-style=\"oblique\" font-weight=\"bold\">"); |
---|
5123 | else if(!strcmp(prim->data.text->fontname, "Courier-Bold")) |
---|
5124 | gl2psPrintf("font-family=\"Courier\" font-weight=\"bold\">"); |
---|
5125 | else if(!strcmp(prim->data.text->fontname, "Courier-Oblique")) |
---|
5126 | gl2psPrintf("font-family=\"Courier\" font-style=\"oblique\">"); |
---|
5127 | else if(!strcmp(prim->data.text->fontname, "Courier-BoldOblique")) |
---|
5128 | gl2psPrintf("font-family=\"Courier\" font-style=\"oblique\" font-weight=\"bold\">"); |
---|
5129 | else |
---|
5130 | gl2psPrintf("font-family=\"%s\">", prim->data.text->fontname); |
---|
5131 | gl2psPrintf("%s</text>\n", prim->data.text->str); |
---|
5132 | break; |
---|
5133 | case GL2PS_SPECIAL : |
---|
5134 | /* alignment contains the format for which the special output text |
---|
5135 | is intended */ |
---|
5136 | if(prim->data.text->alignment == GL2PS_SVG) |
---|
5137 | gl2psPrintf("%s\n", prim->data.text->str); |
---|
5138 | break; |
---|
5139 | default : |
---|
5140 | break; |
---|
5141 | } |
---|
5142 | } |
---|
5143 | |
---|
5144 | static void gl2psPrintSVGFooter(void) |
---|
5145 | { |
---|
5146 | gl2psPrintf("</g>\n"); |
---|
5147 | gl2psPrintf("</svg>\n"); |
---|
5148 | |
---|
5149 | gl2psPrintGzipFooter(); |
---|
5150 | } |
---|
5151 | |
---|
5152 | static void gl2psPrintSVGBeginViewport(GLint viewport[4]) |
---|
5153 | { |
---|
5154 | GLint index; |
---|
5155 | char col[32]; |
---|
5156 | GLfloat rgba[4]; |
---|
5157 | int x = viewport[0], y = viewport[1], w = viewport[2], h = viewport[3]; |
---|
5158 | |
---|
5159 | glRenderMode(GL_FEEDBACK); |
---|
5160 | |
---|
5161 | if(gl2ps->header){ |
---|
5162 | gl2psPrintSVGHeader(); |
---|
5163 | gl2ps->header = GL_FALSE; |
---|
5164 | } |
---|
5165 | |
---|
5166 | if(gl2ps->options & GL2PS_DRAW_BACKGROUND){ |
---|
5167 | if(gl2ps->colormode == GL_RGBA || gl2ps->colorsize == 0){ |
---|
5168 | glGetFloatv(GL_COLOR_CLEAR_VALUE, rgba); |
---|
5169 | } |
---|
5170 | else{ |
---|
5171 | glGetIntegerv(GL_INDEX_CLEAR_VALUE, &index); |
---|
5172 | rgba[0] = gl2ps->colormap[index][0]; |
---|
5173 | rgba[1] = gl2ps->colormap[index][1]; |
---|
5174 | rgba[2] = gl2ps->colormap[index][2]; |
---|
5175 | rgba[3] = 1.0F; |
---|
5176 | } |
---|
5177 | gl2psSVGGetColorString(rgba, col); |
---|
5178 | gl2psPrintf("<polygon fill=\"%s\" points=\"%d,%d %d,%d %d,%d %d,%d\"/>\n", col, |
---|
5179 | x, gl2ps->viewport[3] - y, |
---|
5180 | x + w, gl2ps->viewport[3] - y, |
---|
5181 | x + w, gl2ps->viewport[3] - (y + h), |
---|
5182 | x, gl2ps->viewport[3] - (y + h)); |
---|
5183 | } |
---|
5184 | |
---|
5185 | gl2psPrintf("<clipPath id=\"cp%d%d%d%d\">\n", x, y, w, h); |
---|
5186 | gl2psPrintf(" <polygon points=\"%d,%d %d,%d %d,%d %d,%d\"/>\n", |
---|
5187 | x, gl2ps->viewport[3] - y, |
---|
5188 | x + w, gl2ps->viewport[3] - y, |
---|
5189 | x + w, gl2ps->viewport[3] - (y + h), |
---|
5190 | x, gl2ps->viewport[3] - (y + h)); |
---|
5191 | gl2psPrintf("</clipPath>\n"); |
---|
5192 | gl2psPrintf("<g clip-path=\"url(#cp%d%d%d%d)\">\n", x, y, w, h); |
---|
5193 | } |
---|
5194 | |
---|
5195 | static GLint gl2psPrintSVGEndViewport(void) |
---|
5196 | { |
---|
5197 | GLint res; |
---|
5198 | |
---|
5199 | res = gl2psPrintPrimitives(); |
---|
5200 | gl2psPrintf("</g>\n"); |
---|
5201 | return res; |
---|
5202 | } |
---|
5203 | |
---|
5204 | static void gl2psPrintSVGFinalPrimitive(void) |
---|
5205 | { |
---|
5206 | /* End any remaining line, if any */ |
---|
5207 | gl2psEndSVGLine(); |
---|
5208 | } |
---|
5209 | |
---|
5210 | /* definition of the SVG backend */ |
---|
5211 | |
---|
5212 | static GL2PSbackend gl2psSVG = { |
---|
5213 | gl2psPrintSVGHeader, |
---|
5214 | gl2psPrintSVGFooter, |
---|
5215 | gl2psPrintSVGBeginViewport, |
---|
5216 | gl2psPrintSVGEndViewport, |
---|
5217 | gl2psPrintSVGPrimitive, |
---|
5218 | gl2psPrintSVGFinalPrimitive, |
---|
5219 | "svg", |
---|
5220 | "Scalable Vector Graphics" |
---|
5221 | }; |
---|
5222 | |
---|
5223 | /********************************************************************* |
---|
5224 | * |
---|
5225 | * PGF routines |
---|
5226 | * |
---|
5227 | *********************************************************************/ |
---|
5228 | |
---|
5229 | static void gl2psPrintPGFColor(GL2PSrgba rgba) |
---|
5230 | { |
---|
5231 | if(!gl2psSameColor(gl2ps->lastrgba, rgba)){ |
---|
5232 | gl2psSetLastColor(rgba); |
---|
5233 | fprintf(gl2ps->stream, "\\color[rgb]{%f,%f,%f}\n", rgba[0], rgba[1], rgba[2]); |
---|
5234 | } |
---|
5235 | } |
---|
5236 | |
---|
5237 | static void gl2psPrintPGFHeader(void) |
---|
5238 | { |
---|
5239 | time_t now; |
---|
5240 | |
---|
5241 | time(&now); |
---|
5242 | |
---|
5243 | fprintf(gl2ps->stream, |
---|
5244 | "%% Title: %s\n" |
---|
5245 | "%% Creator: GL2PS %d.%d.%d%s, %s\n" |
---|
5246 | "%% For: %s\n" |
---|
5247 | "%% CreationDate: %s", |
---|
5248 | gl2ps->title, GL2PS_MAJOR_VERSION, GL2PS_MINOR_VERSION, |
---|
5249 | GL2PS_PATCH_VERSION, GL2PS_EXTRA_VERSION, GL2PS_COPYRIGHT, |
---|
5250 | gl2ps->producer, ctime(&now)); |
---|
5251 | |
---|
5252 | fprintf(gl2ps->stream, "\\begin{pgfpicture}\n"); |
---|
5253 | if(gl2ps->options & GL2PS_DRAW_BACKGROUND){ |
---|
5254 | gl2psPrintPGFColor(gl2ps->bgcolor); |
---|
5255 | fprintf(gl2ps->stream, |
---|
5256 | "\\pgfpathrectanglecorners{" |
---|
5257 | "\\pgfpoint{%dpt}{%dpt}}{\\pgfpoint{%dpt}{%dpt}}\n" |
---|
5258 | "\\pgfusepath{fill}\n", |
---|
5259 | (int)gl2ps->viewport[0], (int)gl2ps->viewport[1], |
---|
5260 | (int)gl2ps->viewport[2], (int)gl2ps->viewport[3]); |
---|
5261 | } |
---|
5262 | } |
---|
5263 | |
---|
5264 | static void gl2psPrintPGFDash(GLushort pattern, GLint factor) |
---|
5265 | { |
---|
5266 | int i, n, array[10]; |
---|
5267 | |
---|
5268 | if(pattern == gl2ps->lastpattern && factor == gl2ps->lastfactor) |
---|
5269 | return; |
---|
5270 | |
---|
5271 | gl2ps->lastpattern = pattern; |
---|
5272 | gl2ps->lastfactor = factor; |
---|
5273 | |
---|
5274 | if(!pattern || !factor){ |
---|
5275 | /* solid line */ |
---|
5276 | fprintf(gl2ps->stream, "\\pgfsetdash{}{0pt}\n"); |
---|
5277 | } |
---|
5278 | else{ |
---|
5279 | gl2psParseStipplePattern(pattern, factor, &n, array); |
---|
5280 | fprintf(gl2ps->stream, "\\pgfsetdash{"); |
---|
5281 | for(i = 0; i < n; i++) fprintf(gl2ps->stream, "{%dpt}", array[i]); |
---|
5282 | fprintf(gl2ps->stream, "}{0pt}\n"); |
---|
5283 | } |
---|
5284 | } |
---|
5285 | |
---|
5286 | static const char *gl2psPGFTextAlignment(int align) |
---|
5287 | { |
---|
5288 | switch(align){ |
---|
5289 | case GL2PS_TEXT_C : return "center"; |
---|
5290 | case GL2PS_TEXT_CL : return "west"; |
---|
5291 | case GL2PS_TEXT_CR : return "east"; |
---|
5292 | case GL2PS_TEXT_B : return "south"; |
---|
5293 | case GL2PS_TEXT_BR : return "south east"; |
---|
5294 | case GL2PS_TEXT_T : return "north"; |
---|
5295 | case GL2PS_TEXT_TL : return "north west"; |
---|
5296 | case GL2PS_TEXT_TR : return "north east"; |
---|
5297 | case GL2PS_TEXT_BL : |
---|
5298 | default : return "south west"; |
---|
5299 | } |
---|
5300 | } |
---|
5301 | |
---|
5302 | static void gl2psPrintPGFPrimitive(void *data) |
---|
5303 | { |
---|
5304 | GL2PSprimitive *prim; |
---|
5305 | |
---|
5306 | prim = *(GL2PSprimitive**)data; |
---|
5307 | |
---|
5308 | switch(prim->type){ |
---|
5309 | case GL2PS_POINT : |
---|
5310 | /* Points in openGL are rectangular */ |
---|
5311 | gl2psPrintPGFColor(prim->verts[0].rgba); |
---|
5312 | fprintf(gl2ps->stream, |
---|
5313 | "\\pgfpathrectangle{\\pgfpoint{%fpt}{%fpt}}" |
---|
5314 | "{\\pgfpoint{%fpt}{%fpt}}\n\\pgfusepath{fill}\n", |
---|
5315 | prim->verts[0].xyz[0]-0.5*prim->width, |
---|
5316 | prim->verts[0].xyz[1]-0.5*prim->width, |
---|
5317 | prim->width,prim->width); |
---|
5318 | break; |
---|
5319 | case GL2PS_LINE : |
---|
5320 | gl2psPrintPGFColor(prim->verts[0].rgba); |
---|
5321 | if(gl2ps->lastlinewidth != prim->width){ |
---|
5322 | gl2ps->lastlinewidth = prim->width; |
---|
5323 | fprintf(gl2ps->stream, "\\pgfsetlinewidth{%fpt}\n", gl2ps->lastlinewidth); |
---|
5324 | } |
---|
5325 | gl2psPrintPGFDash(prim->pattern, prim->factor); |
---|
5326 | fprintf(gl2ps->stream, |
---|
5327 | "\\pgfpathmoveto{\\pgfpoint{%fpt}{%fpt}}\n" |
---|
5328 | "\\pgflineto{\\pgfpoint{%fpt}{%fpt}}\n" |
---|
5329 | "\\pgfusepath{stroke}\n", |
---|
5330 | prim->verts[1].xyz[0], prim->verts[1].xyz[1], |
---|
5331 | prim->verts[0].xyz[0], prim->verts[0].xyz[1]); |
---|
5332 | break; |
---|
5333 | case GL2PS_TRIANGLE : |
---|
5334 | if(gl2ps->lastlinewidth != 0){ |
---|
5335 | gl2ps->lastlinewidth = 0; |
---|
5336 | fprintf(gl2ps->stream, "\\pgfsetlinewidth{0.01pt}\n"); |
---|
5337 | } |
---|
5338 | gl2psPrintPGFColor(prim->verts[0].rgba); |
---|
5339 | fprintf(gl2ps->stream, |
---|
5340 | "\\pgfpathmoveto{\\pgfpoint{%fpt}{%fpt}}\n" |
---|
5341 | "\\pgflineto{\\pgfpoint{%fpt}{%fpt}}\n" |
---|
5342 | "\\pgflineto{\\pgfpoint{%fpt}{%fpt}}\n" |
---|
5343 | "\\pgfpathclose\n" |
---|
5344 | "\\pgfusepath{fill,stroke}\n", |
---|
5345 | prim->verts[2].xyz[0], prim->verts[2].xyz[1], |
---|
5346 | prim->verts[1].xyz[0], prim->verts[1].xyz[1], |
---|
5347 | prim->verts[0].xyz[0], prim->verts[0].xyz[1]); |
---|
5348 | break; |
---|
5349 | case GL2PS_TEXT : |
---|
5350 | fprintf(gl2ps->stream, "{\n\\pgftransformshift{\\pgfpoint{%fpt}{%fpt}}\n", |
---|
5351 | prim->verts[0].xyz[0], prim->verts[0].xyz[1]); |
---|
5352 | |
---|
5353 | if(prim->data.text->angle) |
---|
5354 | fprintf(gl2ps->stream, "\\pgftransformrotate{%f}{", prim->data.text->angle); |
---|
5355 | |
---|
5356 | fprintf(gl2ps->stream, "\\pgfnode{rectangle}{%s}{\\fontsize{%d}{0}\\selectfont", |
---|
5357 | gl2psPGFTextAlignment(prim->data.text->alignment), |
---|
5358 | prim->data.text->fontsize); |
---|
5359 | |
---|
5360 | fprintf(gl2ps->stream, "\\textcolor[rgb]{%g,%g,%g}{{%s}}", |
---|
5361 | prim->verts[0].rgba[0], prim->verts[0].rgba[1], |
---|
5362 | prim->verts[0].rgba[2], prim->data.text->str); |
---|
5363 | |
---|
5364 | fprintf(gl2ps->stream, "}{}{\\pgfusepath{discard}}}\n"); |
---|
5365 | break; |
---|
5366 | case GL2PS_SPECIAL : |
---|
5367 | /* alignment contains the format for which the special output text |
---|
5368 | is intended */ |
---|
5369 | if (prim->data.text->alignment == GL2PS_PGF) |
---|
5370 | fprintf(gl2ps->stream, "%s\n", prim->data.text->str); |
---|
5371 | break; |
---|
5372 | default : |
---|
5373 | break; |
---|
5374 | } |
---|
5375 | } |
---|
5376 | |
---|
5377 | static void gl2psPrintPGFFooter(void) |
---|
5378 | { |
---|
5379 | fprintf(gl2ps->stream, "\\end{pgfpicture}\n"); |
---|
5380 | } |
---|
5381 | |
---|
5382 | static void gl2psPrintPGFBeginViewport(GLint viewport[4]) |
---|
5383 | { |
---|
5384 | GLint index; |
---|
5385 | GLfloat rgba[4]; |
---|
5386 | int x = viewport[0], y = viewport[1], w = viewport[2], h = viewport[3]; |
---|
5387 | |
---|
5388 | glRenderMode(GL_FEEDBACK); |
---|
5389 | |
---|
5390 | if(gl2ps->header){ |
---|
5391 | gl2psPrintPGFHeader(); |
---|
5392 | gl2ps->header = GL_FALSE; |
---|
5393 | } |
---|
5394 | |
---|
5395 | fprintf(gl2ps->stream, "\\begin{pgfscope}\n"); |
---|
5396 | if(gl2ps->options & GL2PS_DRAW_BACKGROUND){ |
---|
5397 | if(gl2ps->colormode == GL_RGBA || gl2ps->colorsize == 0){ |
---|
5398 | glGetFloatv(GL_COLOR_CLEAR_VALUE, rgba); |
---|
5399 | } |
---|
5400 | else{ |
---|
5401 | glGetIntegerv(GL_INDEX_CLEAR_VALUE, &index); |
---|
5402 | rgba[0] = gl2ps->colormap[index][0]; |
---|
5403 | rgba[1] = gl2ps->colormap[index][1]; |
---|
5404 | rgba[2] = gl2ps->colormap[index][2]; |
---|
5405 | rgba[3] = 1.0F; |
---|
5406 | } |
---|
5407 | gl2psPrintPGFColor(rgba); |
---|
5408 | fprintf(gl2ps->stream, |
---|
5409 | "\\pgfpathrectangle{\\pgfpoint{%dpt}{%dpt}}" |
---|
5410 | "{\\pgfpoint{%dpt}{%dpt}}\n" |
---|
5411 | "\\pgfusepath{fill}\n", |
---|
5412 | x, y, w, h); |
---|
5413 | } |
---|
5414 | |
---|
5415 | fprintf(gl2ps->stream, |
---|
5416 | "\\pgfpathrectangle{\\pgfpoint{%dpt}{%dpt}}" |
---|
5417 | "{\\pgfpoint{%dpt}{%dpt}}\n" |
---|
5418 | "\\pgfusepath{clip}\n", |
---|
5419 | x, y, w, h); |
---|
5420 | } |
---|
5421 | |
---|
5422 | static GLint gl2psPrintPGFEndViewport(void) |
---|
5423 | { |
---|
5424 | GLint res; |
---|
5425 | res = gl2psPrintPrimitives(); |
---|
5426 | fprintf(gl2ps->stream, "\\end{pgfscope}\n"); |
---|
5427 | return res; |
---|
5428 | } |
---|
5429 | |
---|
5430 | static void gl2psPrintPGFFinalPrimitive(void) |
---|
5431 | { |
---|
5432 | } |
---|
5433 | |
---|
5434 | /* definition of the PGF backend */ |
---|
5435 | |
---|
5436 | static GL2PSbackend gl2psPGF = { |
---|
5437 | gl2psPrintPGFHeader, |
---|
5438 | gl2psPrintPGFFooter, |
---|
5439 | gl2psPrintPGFBeginViewport, |
---|
5440 | gl2psPrintPGFEndViewport, |
---|
5441 | gl2psPrintPGFPrimitive, |
---|
5442 | gl2psPrintPGFFinalPrimitive, |
---|
5443 | "tex", |
---|
5444 | "PGF Latex Graphics" |
---|
5445 | }; |
---|
5446 | |
---|
5447 | /********************************************************************* |
---|
5448 | * |
---|
5449 | * General primitive printing routine |
---|
5450 | * |
---|
5451 | *********************************************************************/ |
---|
5452 | |
---|
5453 | /* Warning: the ordering of the backends must match the format |
---|
5454 | #defines in gl2ps.h */ |
---|
5455 | |
---|
5456 | static GL2PSbackend *gl2psbackends[] = { |
---|
5457 | &gl2psPS, /* 0 */ |
---|
5458 | &gl2psEPS, /* 1 */ |
---|
5459 | &gl2psTEX, /* 2 */ |
---|
5460 | &gl2psPDF, /* 3 */ |
---|
5461 | &gl2psSVG, /* 4 */ |
---|
5462 | &gl2psPGF /* 5 */ |
---|
5463 | }; |
---|
5464 | |
---|
5465 | static void gl2psComputeTightBoundingBox(void *data) |
---|
5466 | { |
---|
5467 | GL2PSprimitive *prim; |
---|
5468 | int i; |
---|
5469 | |
---|
5470 | prim = *(GL2PSprimitive**)data; |
---|
5471 | |
---|
5472 | for(i = 0; i < prim->numverts; i++){ |
---|
5473 | if(prim->verts[i].xyz[0] < gl2ps->viewport[0]) |
---|
5474 | gl2ps->viewport[0] = (GLint)prim->verts[i].xyz[0]; |
---|
5475 | if(prim->verts[i].xyz[0] > gl2ps->viewport[2]) |
---|
5476 | gl2ps->viewport[2] = (GLint)(prim->verts[i].xyz[0] + 0.5F); |
---|
5477 | if(prim->verts[i].xyz[1] < gl2ps->viewport[1]) |
---|
5478 | gl2ps->viewport[1] = (GLint)prim->verts[i].xyz[1]; |
---|
5479 | if(prim->verts[i].xyz[1] > gl2ps->viewport[3]) |
---|
5480 | gl2ps->viewport[3] = (GLint)(prim->verts[i].xyz[1] + 0.5F); |
---|
5481 | } |
---|
5482 | } |
---|
5483 | |
---|
5484 | static GLint gl2psPrintPrimitives(void) |
---|
5485 | { |
---|
5486 | GL2PSbsptree *root; |
---|
5487 | GL2PSxyz eye = {0.0F, 0.0F, 100.0F * GL2PS_ZSCALE}; |
---|
5488 | GLint used; |
---|
5489 | |
---|
5490 | used = glRenderMode(GL_RENDER); |
---|
5491 | |
---|
5492 | if(used < 0){ |
---|
5493 | gl2psMsg(GL2PS_INFO, "OpenGL feedback buffer overflow"); |
---|
5494 | return GL2PS_OVERFLOW; |
---|
5495 | } |
---|
5496 | |
---|
5497 | if(used > 0) |
---|
5498 | gl2psParseFeedbackBuffer(used); |
---|
5499 | |
---|
5500 | gl2psRescaleAndOffset(); |
---|
5501 | |
---|
5502 | if(gl2ps->header){ |
---|
5503 | if(gl2psListNbr(gl2ps->primitives) && |
---|
5504 | (gl2ps->options & GL2PS_TIGHT_BOUNDING_BOX)){ |
---|
5505 | gl2ps->viewport[0] = gl2ps->viewport[1] = 100000; |
---|
5506 | gl2ps->viewport[2] = gl2ps->viewport[3] = -100000; |
---|
5507 | gl2psListAction(gl2ps->primitives, gl2psComputeTightBoundingBox); |
---|
5508 | } |
---|
5509 | (gl2psbackends[gl2ps->format]->printHeader)(); |
---|
5510 | gl2ps->header = GL_FALSE; |
---|
5511 | } |
---|
5512 | |
---|
5513 | if(!gl2psListNbr(gl2ps->primitives)){ |
---|
5514 | /* empty feedback buffer and/or nothing else to print */ |
---|
5515 | return GL2PS_NO_FEEDBACK; |
---|
5516 | } |
---|
5517 | |
---|
5518 | switch(gl2ps->sort){ |
---|
5519 | case GL2PS_NO_SORT : |
---|
5520 | gl2psListAction(gl2ps->primitives, gl2psbackends[gl2ps->format]->printPrimitive); |
---|
5521 | gl2psListAction(gl2ps->primitives, gl2psFreePrimitive); |
---|
5522 | /* reset the primitive list, waiting for the next viewport */ |
---|
5523 | gl2psListReset(gl2ps->primitives); |
---|
5524 | break; |
---|
5525 | case GL2PS_SIMPLE_SORT : |
---|
5526 | gl2psListSort(gl2ps->primitives, gl2psCompareDepth); |
---|
5527 | if(gl2ps->options & GL2PS_OCCLUSION_CULL){ |
---|
5528 | gl2psListActionInverse(gl2ps->primitives, gl2psAddInImageTree); |
---|
5529 | gl2psFreeBspImageTree(&gl2ps->imagetree); |
---|
5530 | } |
---|
5531 | gl2psListAction(gl2ps->primitives, gl2psbackends[gl2ps->format]->printPrimitive); |
---|
5532 | gl2psListAction(gl2ps->primitives, gl2psFreePrimitive); |
---|
5533 | /* reset the primitive list, waiting for the next viewport */ |
---|
5534 | gl2psListReset(gl2ps->primitives); |
---|
5535 | break; |
---|
5536 | case GL2PS_BSP_SORT : |
---|
5537 | root = (GL2PSbsptree*)gl2psMalloc(sizeof(GL2PSbsptree)); |
---|
5538 | gl2psBuildBspTree(root, gl2ps->primitives); |
---|
5539 | if(GL_TRUE == gl2ps->boundary) gl2psBuildPolygonBoundary(root); |
---|
5540 | if(gl2ps->options & GL2PS_OCCLUSION_CULL){ |
---|
5541 | gl2psTraverseBspTree(root, eye, -GL2PS_EPSILON, gl2psLess, |
---|
5542 | gl2psAddInImageTree, 1); |
---|
5543 | gl2psFreeBspImageTree(&gl2ps->imagetree); |
---|
5544 | } |
---|
5545 | gl2psTraverseBspTree(root, eye, GL2PS_EPSILON, gl2psGreater, |
---|
5546 | gl2psbackends[gl2ps->format]->printPrimitive, 0); |
---|
5547 | gl2psFreeBspTree(&root); |
---|
5548 | /* reallocate the primitive list (it's been deleted by |
---|
5549 | gl2psBuildBspTree) in case there is another viewport */ |
---|
5550 | gl2ps->primitives = gl2psListCreate(500, 500, sizeof(GL2PSprimitive*)); |
---|
5551 | break; |
---|
5552 | } |
---|
5553 | gl2psbackends[gl2ps->format]->printFinalPrimitive(); |
---|
5554 | |
---|
5555 | return GL2PS_SUCCESS; |
---|
5556 | } |
---|
5557 | |
---|
5558 | /********************************************************************* |
---|
5559 | * |
---|
5560 | * Public routines |
---|
5561 | * |
---|
5562 | *********************************************************************/ |
---|
5563 | |
---|
5564 | GL2PSDLL_API GLint gl2psBeginPage(const char *title, const char *producer, |
---|
5565 | GLint viewport[4], GLint format, GLint sort, |
---|
5566 | GLint options, GLint colormode, |
---|
5567 | GLint colorsize, GL2PSrgba *colormap, |
---|
5568 | GLint nr, GLint ng, GLint nb, GLint buffersize, |
---|
5569 | FILE *stream, const char *filename) |
---|
5570 | { |
---|
5571 | GLint index; |
---|
5572 | int i; |
---|
5573 | |
---|
5574 | if(gl2ps){ |
---|
5575 | gl2psMsg(GL2PS_ERROR, "gl2psBeginPage called in wrong program state"); |
---|
5576 | return GL2PS_ERROR; |
---|
5577 | } |
---|
5578 | |
---|
5579 | gl2ps = (GL2PScontext*)gl2psMalloc(sizeof(GL2PScontext)); |
---|
5580 | |
---|
5581 | if(format >= 0 && format < (GLint)(sizeof(gl2psbackends) / sizeof(gl2psbackends[0]))){ |
---|
5582 | gl2ps->format = format; |
---|
5583 | } |
---|
5584 | else { |
---|
5585 | gl2psMsg(GL2PS_ERROR, "Unknown output format: %d", format); |
---|
5586 | gl2psFree(gl2ps); |
---|
5587 | gl2ps = NULL; |
---|
5588 | return GL2PS_ERROR; |
---|
5589 | } |
---|
5590 | |
---|
5591 | switch(sort){ |
---|
5592 | case GL2PS_NO_SORT : |
---|
5593 | case GL2PS_SIMPLE_SORT : |
---|
5594 | case GL2PS_BSP_SORT : |
---|
5595 | gl2ps->sort = sort; |
---|
5596 | break; |
---|
5597 | default : |
---|
5598 | gl2psMsg(GL2PS_ERROR, "Unknown sorting algorithm: %d", sort); |
---|
5599 | gl2psFree(gl2ps); |
---|
5600 | gl2ps = NULL; |
---|
5601 | return GL2PS_ERROR; |
---|
5602 | } |
---|
5603 | |
---|
5604 | if(stream){ |
---|
5605 | gl2ps->stream = stream; |
---|
5606 | } |
---|
5607 | else{ |
---|
5608 | gl2psMsg(GL2PS_ERROR, "Bad file pointer"); |
---|
5609 | gl2psFree(gl2ps); |
---|
5610 | gl2ps = NULL; |
---|
5611 | return GL2PS_ERROR; |
---|
5612 | } |
---|
5613 | |
---|
5614 | gl2ps->header = GL_TRUE; |
---|
5615 | gl2ps->maxbestroot = 10; |
---|
5616 | gl2ps->options = options; |
---|
5617 | gl2ps->compress = NULL; |
---|
5618 | gl2ps->imagemap_head = NULL; |
---|
5619 | gl2ps->imagemap_tail = NULL; |
---|
5620 | |
---|
5621 | if(gl2ps->options & GL2PS_USE_CURRENT_VIEWPORT){ |
---|
5622 | glGetIntegerv(GL_VIEWPORT, gl2ps->viewport); |
---|
5623 | } |
---|
5624 | else{ |
---|
5625 | for(i = 0; i < 4; i++){ |
---|
5626 | gl2ps->viewport[i] = viewport[i]; |
---|
5627 | } |
---|
5628 | } |
---|
5629 | |
---|
5630 | if(!gl2ps->viewport[2] || !gl2ps->viewport[3]){ |
---|
5631 | gl2psMsg(GL2PS_ERROR, "Incorrect viewport (x=%d, y=%d, width=%d, height=%d)", |
---|
5632 | gl2ps->viewport[0], gl2ps->viewport[1], |
---|
5633 | gl2ps->viewport[2], gl2ps->viewport[3]); |
---|
5634 | gl2psFree(gl2ps); |
---|
5635 | gl2ps = NULL; |
---|
5636 | return GL2PS_ERROR; |
---|
5637 | } |
---|
5638 | |
---|
5639 | gl2ps->threshold[0] = nr ? 1.0F / (GLfloat)nr : 0.064F; |
---|
5640 | gl2ps->threshold[1] = ng ? 1.0F / (GLfloat)ng : 0.034F; |
---|
5641 | gl2ps->threshold[2] = nb ? 1.0F / (GLfloat)nb : 0.100F; |
---|
5642 | gl2ps->colormode = colormode; |
---|
5643 | gl2ps->buffersize = buffersize > 0 ? buffersize : 2048 * 2048; |
---|
5644 | for(i = 0; i < 3; i++){ |
---|
5645 | gl2ps->lastvertex.xyz[i] = -1.0F; |
---|
5646 | } |
---|
5647 | for(i = 0; i < 4; i++){ |
---|
5648 | gl2ps->lastvertex.rgba[i] = -1.0F; |
---|
5649 | gl2ps->lastrgba[i] = -1.0F; |
---|
5650 | } |
---|
5651 | gl2ps->lastlinewidth = -1.0F; |
---|
5652 | gl2ps->lastpattern = 0; |
---|
5653 | gl2ps->lastfactor = 0; |
---|
5654 | gl2ps->imagetree = NULL; |
---|
5655 | gl2ps->primitivetoadd = NULL; |
---|
5656 | gl2ps->zerosurfacearea = GL_FALSE; |
---|
5657 | gl2ps->pdfprimlist = NULL; |
---|
5658 | gl2ps->pdfgrouplist = NULL; |
---|
5659 | gl2ps->xreflist = NULL; |
---|
5660 | |
---|
5661 | /* get default blending mode from current OpenGL state (enabled by |
---|
5662 | default for SVG) */ |
---|
5663 | gl2ps->blending = (gl2ps->format == GL2PS_SVG) ? GL_TRUE : glIsEnabled(GL_BLEND); |
---|
5664 | glGetIntegerv(GL_BLEND_SRC, &gl2ps->blendfunc[0]); |
---|
5665 | glGetIntegerv(GL_BLEND_DST, &gl2ps->blendfunc[1]); |
---|
5666 | |
---|
5667 | if(gl2ps->colormode == GL_RGBA){ |
---|
5668 | gl2ps->colorsize = 0; |
---|
5669 | gl2ps->colormap = NULL; |
---|
5670 | glGetFloatv(GL_COLOR_CLEAR_VALUE, gl2ps->bgcolor); |
---|
5671 | } |
---|
5672 | else if(gl2ps->colormode == GL_COLOR_INDEX){ |
---|
5673 | if(!colorsize || !colormap){ |
---|
5674 | gl2psMsg(GL2PS_ERROR, "Missing colormap for GL_COLOR_INDEX rendering"); |
---|
5675 | gl2psFree(gl2ps); |
---|
5676 | gl2ps = NULL; |
---|
5677 | return GL2PS_ERROR; |
---|
5678 | } |
---|
5679 | gl2ps->colorsize = colorsize; |
---|
5680 | gl2ps->colormap = (GL2PSrgba*)gl2psMalloc(gl2ps->colorsize * sizeof(GL2PSrgba)); |
---|
5681 | memcpy(gl2ps->colormap, colormap, gl2ps->colorsize * sizeof(GL2PSrgba)); |
---|
5682 | glGetIntegerv(GL_INDEX_CLEAR_VALUE, &index); |
---|
5683 | gl2ps->bgcolor[0] = gl2ps->colormap[index][0]; |
---|
5684 | gl2ps->bgcolor[1] = gl2ps->colormap[index][1]; |
---|
5685 | gl2ps->bgcolor[2] = gl2ps->colormap[index][2]; |
---|
5686 | gl2ps->bgcolor[3] = 1.0F; |
---|
5687 | } |
---|
5688 | else{ |
---|
5689 | gl2psMsg(GL2PS_ERROR, "Unknown color mode in gl2psBeginPage"); |
---|
5690 | gl2psFree(gl2ps); |
---|
5691 | gl2ps = NULL; |
---|
5692 | return GL2PS_ERROR; |
---|
5693 | } |
---|
5694 | |
---|
5695 | if(!title){ |
---|
5696 | gl2ps->title = (char*)gl2psMalloc(sizeof(char)); |
---|
5697 | gl2ps->title[0] = '\0'; |
---|
5698 | } |
---|
5699 | else{ |
---|
5700 | gl2ps->title = (char*)gl2psMalloc((strlen(title)+1)*sizeof(char)); |
---|
5701 | strcpy(gl2ps->title, title); |
---|
5702 | } |
---|
5703 | |
---|
5704 | if(!producer){ |
---|
5705 | gl2ps->producer = (char*)gl2psMalloc(sizeof(char)); |
---|
5706 | gl2ps->producer[0] = '\0'; |
---|
5707 | } |
---|
5708 | else{ |
---|
5709 | gl2ps->producer = (char*)gl2psMalloc((strlen(producer)+1)*sizeof(char)); |
---|
5710 | strcpy(gl2ps->producer, producer); |
---|
5711 | } |
---|
5712 | |
---|
5713 | if(!filename){ |
---|
5714 | gl2ps->filename = (char*)gl2psMalloc(sizeof(char)); |
---|
5715 | gl2ps->filename[0] = '\0'; |
---|
5716 | } |
---|
5717 | else{ |
---|
5718 | gl2ps->filename = (char*)gl2psMalloc((strlen(filename)+1)*sizeof(char)); |
---|
5719 | strcpy(gl2ps->filename, filename); |
---|
5720 | } |
---|
5721 | |
---|
5722 | gl2ps->primitives = gl2psListCreate(500, 500, sizeof(GL2PSprimitive*)); |
---|
5723 | gl2ps->auxprimitives = gl2psListCreate(100, 100, sizeof(GL2PSprimitive*)); |
---|
5724 | gl2ps->feedback = (GLfloat*)gl2psMalloc(gl2ps->buffersize * sizeof(GLfloat)); |
---|
5725 | glFeedbackBuffer(gl2ps->buffersize, GL_3D_COLOR, gl2ps->feedback); |
---|
5726 | glRenderMode(GL_FEEDBACK); |
---|
5727 | |
---|
5728 | return GL2PS_SUCCESS; |
---|
5729 | } |
---|
5730 | |
---|
5731 | GL2PSDLL_API GLint gl2psEndPage(void) |
---|
5732 | { |
---|
5733 | GLint res; |
---|
5734 | |
---|
5735 | if(!gl2ps) return GL2PS_UNINITIALIZED; |
---|
5736 | |
---|
5737 | res = gl2psPrintPrimitives(); |
---|
5738 | |
---|
5739 | if(res != GL2PS_OVERFLOW) |
---|
5740 | (gl2psbackends[gl2ps->format]->printFooter)(); |
---|
5741 | |
---|
5742 | fflush(gl2ps->stream); |
---|
5743 | |
---|
5744 | gl2psListDelete(gl2ps->primitives); |
---|
5745 | gl2psListDelete(gl2ps->auxprimitives); |
---|
5746 | gl2psFreeImagemap(gl2ps->imagemap_head); |
---|
5747 | gl2psFree(gl2ps->colormap); |
---|
5748 | gl2psFree(gl2ps->title); |
---|
5749 | gl2psFree(gl2ps->producer); |
---|
5750 | gl2psFree(gl2ps->filename); |
---|
5751 | gl2psFree(gl2ps->feedback); |
---|
5752 | gl2psFree(gl2ps); |
---|
5753 | gl2ps = NULL; |
---|
5754 | |
---|
5755 | return res; |
---|
5756 | } |
---|
5757 | |
---|
5758 | GL2PSDLL_API GLint gl2psBeginViewport(GLint viewport[4]) |
---|
5759 | { |
---|
5760 | if(!gl2ps) return GL2PS_UNINITIALIZED; |
---|
5761 | |
---|
5762 | (gl2psbackends[gl2ps->format]->beginViewport)(viewport); |
---|
5763 | |
---|
5764 | return GL2PS_SUCCESS; |
---|
5765 | } |
---|
5766 | |
---|
5767 | GL2PSDLL_API GLint gl2psEndViewport(void) |
---|
5768 | { |
---|
5769 | GLint res; |
---|
5770 | |
---|
5771 | if(!gl2ps) return GL2PS_UNINITIALIZED; |
---|
5772 | |
---|
5773 | res = (gl2psbackends[gl2ps->format]->endViewport)(); |
---|
5774 | |
---|
5775 | /* reset last used colors, line widths */ |
---|
5776 | gl2ps->lastlinewidth = -1.0F; |
---|
5777 | |
---|
5778 | return res; |
---|
5779 | } |
---|
5780 | |
---|
5781 | GL2PSDLL_API GLint gl2psTextOpt(const char *str, const char *fontname, |
---|
5782 | GLshort fontsize, GLint alignment, GLfloat angle) |
---|
5783 | { |
---|
5784 | return gl2psAddText(GL2PS_TEXT, str, fontname, fontsize, alignment, angle); |
---|
5785 | } |
---|
5786 | |
---|
5787 | GL2PSDLL_API GLint gl2psText(const char *str, const char *fontname, GLshort fontsize) |
---|
5788 | { |
---|
5789 | return gl2psAddText(GL2PS_TEXT, str, fontname, fontsize, GL2PS_TEXT_BL, 0.0F); |
---|
5790 | } |
---|
5791 | |
---|
5792 | GL2PSDLL_API GLint gl2psSpecial(GLint format, const char *str) |
---|
5793 | { |
---|
5794 | return gl2psAddText(GL2PS_SPECIAL, str, "", 0, format, 0.0F); |
---|
5795 | } |
---|
5796 | |
---|
5797 | GL2PSDLL_API GLint gl2psDrawPixels(GLsizei width, GLsizei height, |
---|
5798 | GLint xorig, GLint yorig, |
---|
5799 | GLenum format, GLenum type, |
---|
5800 | const void *pixels) |
---|
5801 | { |
---|
5802 | int size, i; |
---|
5803 | GLfloat pos[4], *piv; |
---|
5804 | GL2PSprimitive *prim; |
---|
5805 | GLboolean valid; |
---|
5806 | |
---|
5807 | if(!gl2ps || !pixels) return GL2PS_UNINITIALIZED; |
---|
5808 | |
---|
5809 | if((width <= 0) || (height <= 0)) return GL2PS_ERROR; |
---|
5810 | |
---|
5811 | if(gl2ps->options & GL2PS_NO_PIXMAP) return GL2PS_SUCCESS; |
---|
5812 | |
---|
5813 | if((format != GL_RGB && format != GL_RGBA) || type != GL_FLOAT){ |
---|
5814 | gl2psMsg(GL2PS_ERROR, "gl2psDrawPixels only implemented for " |
---|
5815 | "GL_RGB/GL_RGBA, GL_FLOAT pixels"); |
---|
5816 | return GL2PS_ERROR; |
---|
5817 | } |
---|
5818 | |
---|
5819 | glGetBooleanv(GL_CURRENT_RASTER_POSITION_VALID, &valid); |
---|
5820 | if(GL_FALSE == valid) return GL2PS_SUCCESS; /* the primitive is culled */ |
---|
5821 | |
---|
5822 | glGetFloatv(GL_CURRENT_RASTER_POSITION, pos); |
---|
5823 | |
---|
5824 | prim = (GL2PSprimitive*)gl2psMalloc(sizeof(GL2PSprimitive)); |
---|
5825 | prim->type = GL2PS_PIXMAP; |
---|
5826 | prim->boundary = 0; |
---|
5827 | prim->numverts = 1; |
---|
5828 | prim->verts = (GL2PSvertex*)gl2psMalloc(sizeof(GL2PSvertex)); |
---|
5829 | prim->verts[0].xyz[0] = pos[0] + xorig; |
---|
5830 | prim->verts[0].xyz[1] = pos[1] + yorig; |
---|
5831 | prim->verts[0].xyz[2] = pos[2]; |
---|
5832 | prim->culled = 0; |
---|
5833 | prim->offset = 0; |
---|
5834 | prim->pattern = 0; |
---|
5835 | prim->factor = 0; |
---|
5836 | prim->width = 1; |
---|
5837 | glGetFloatv(GL_CURRENT_RASTER_COLOR, prim->verts[0].rgba); |
---|
5838 | prim->data.image = (GL2PSimage*)gl2psMalloc(sizeof(GL2PSimage)); |
---|
5839 | prim->data.image->width = width; |
---|
5840 | prim->data.image->height = height; |
---|
5841 | prim->data.image->format = format; |
---|
5842 | prim->data.image->type = type; |
---|
5843 | |
---|
5844 | switch(format){ |
---|
5845 | case GL_RGBA: |
---|
5846 | if(gl2ps->options & GL2PS_NO_BLENDING || !gl2ps->blending){ |
---|
5847 | /* special case: blending turned off */ |
---|
5848 | prim->data.image->format = GL_RGB; |
---|
5849 | size = height * width * 3; |
---|
5850 | prim->data.image->pixels = (GLfloat*)gl2psMalloc(size * sizeof(GLfloat)); |
---|
5851 | piv = (GLfloat*)pixels; |
---|
5852 | for(i = 0; i < size; ++i, ++piv){ |
---|
5853 | prim->data.image->pixels[i] = *piv; |
---|
5854 | if(!((i+1)%3)) |
---|
5855 | ++piv; |
---|
5856 | } |
---|
5857 | } |
---|
5858 | else{ |
---|
5859 | size = height * width * 4; |
---|
5860 | prim->data.image->pixels = (GLfloat*)gl2psMalloc(size * sizeof(GLfloat)); |
---|
5861 | memcpy(prim->data.image->pixels, pixels, size * sizeof(GLfloat)); |
---|
5862 | } |
---|
5863 | break; |
---|
5864 | case GL_RGB: |
---|
5865 | default: |
---|
5866 | size = height * width * 3; |
---|
5867 | prim->data.image->pixels = (GLfloat*)gl2psMalloc(size * sizeof(GLfloat)); |
---|
5868 | memcpy(prim->data.image->pixels, pixels, size * sizeof(GLfloat)); |
---|
5869 | break; |
---|
5870 | } |
---|
5871 | |
---|
5872 | gl2psListAdd(gl2ps->auxprimitives, &prim); |
---|
5873 | glPassThrough(GL2PS_DRAW_PIXELS_TOKEN); |
---|
5874 | |
---|
5875 | return GL2PS_SUCCESS; |
---|
5876 | } |
---|
5877 | |
---|
5878 | GL2PSDLL_API GLint gl2psDrawImageMap(GLsizei width, GLsizei height, |
---|
5879 | const GLfloat position[3], |
---|
5880 | const unsigned char *imagemap){ |
---|
5881 | int size, i; |
---|
5882 | int sizeoffloat = sizeof(GLfloat); |
---|
5883 | |
---|
5884 | if(!gl2ps || !imagemap) return GL2PS_UNINITIALIZED; |
---|
5885 | |
---|
5886 | if((width <= 0) || (height <= 0)) return GL2PS_ERROR; |
---|
5887 | |
---|
5888 | size = height + height * ((width - 1) / 8); |
---|
5889 | glPassThrough(GL2PS_IMAGEMAP_TOKEN); |
---|
5890 | glBegin(GL_POINTS); |
---|
5891 | glVertex3f(position[0], position[1],position[2]); |
---|
5892 | glEnd(); |
---|
5893 | glPassThrough((GLfloat)width); |
---|
5894 | glPassThrough((GLfloat)height); |
---|
5895 | for(i = 0; i < size; i += sizeoffloat){ |
---|
5896 | float *value = (float*)imagemap; |
---|
5897 | glPassThrough(*value); |
---|
5898 | imagemap += sizeoffloat; |
---|
5899 | } |
---|
5900 | return GL2PS_SUCCESS; |
---|
5901 | } |
---|
5902 | |
---|
5903 | GL2PSDLL_API GLint gl2psEnable(GLint mode) |
---|
5904 | { |
---|
5905 | GLint tmp; |
---|
5906 | |
---|
5907 | if(!gl2ps) return GL2PS_UNINITIALIZED; |
---|
5908 | |
---|
5909 | switch(mode){ |
---|
5910 | case GL2PS_POLYGON_OFFSET_FILL : |
---|
5911 | glPassThrough(GL2PS_BEGIN_OFFSET_TOKEN); |
---|
5912 | glGetFloatv(GL_POLYGON_OFFSET_FACTOR, &gl2ps->offset[0]); |
---|
5913 | glGetFloatv(GL_POLYGON_OFFSET_UNITS, &gl2ps->offset[1]); |
---|
5914 | break; |
---|
5915 | case GL2PS_POLYGON_BOUNDARY : |
---|
5916 | glPassThrough(GL2PS_BEGIN_BOUNDARY_TOKEN); |
---|
5917 | break; |
---|
5918 | case GL2PS_LINE_STIPPLE : |
---|
5919 | glPassThrough(GL2PS_BEGIN_STIPPLE_TOKEN); |
---|
5920 | glGetIntegerv(GL_LINE_STIPPLE_PATTERN, &tmp); |
---|
5921 | glPassThrough((GLfloat)tmp); |
---|
5922 | glGetIntegerv(GL_LINE_STIPPLE_REPEAT, &tmp); |
---|
5923 | glPassThrough((GLfloat)tmp); |
---|
5924 | break; |
---|
5925 | case GL2PS_BLEND : |
---|
5926 | glPassThrough(GL2PS_BEGIN_BLEND_TOKEN); |
---|
5927 | break; |
---|
5928 | default : |
---|
5929 | gl2psMsg(GL2PS_WARNING, "Unknown mode in gl2psEnable: %d", mode); |
---|
5930 | return GL2PS_WARNING; |
---|
5931 | } |
---|
5932 | |
---|
5933 | return GL2PS_SUCCESS; |
---|
5934 | } |
---|
5935 | |
---|
5936 | GL2PSDLL_API GLint gl2psDisable(GLint mode) |
---|
5937 | { |
---|
5938 | if(!gl2ps) return GL2PS_UNINITIALIZED; |
---|
5939 | |
---|
5940 | switch(mode){ |
---|
5941 | case GL2PS_POLYGON_OFFSET_FILL : |
---|
5942 | glPassThrough(GL2PS_END_OFFSET_TOKEN); |
---|
5943 | break; |
---|
5944 | case GL2PS_POLYGON_BOUNDARY : |
---|
5945 | glPassThrough(GL2PS_END_BOUNDARY_TOKEN); |
---|
5946 | break; |
---|
5947 | case GL2PS_LINE_STIPPLE : |
---|
5948 | glPassThrough(GL2PS_END_STIPPLE_TOKEN); |
---|
5949 | break; |
---|
5950 | case GL2PS_BLEND : |
---|
5951 | glPassThrough(GL2PS_END_BLEND_TOKEN); |
---|
5952 | break; |
---|
5953 | default : |
---|
5954 | gl2psMsg(GL2PS_WARNING, "Unknown mode in gl2psDisable: %d", mode); |
---|
5955 | return GL2PS_WARNING; |
---|
5956 | } |
---|
5957 | |
---|
5958 | return GL2PS_SUCCESS; |
---|
5959 | } |
---|
5960 | |
---|
5961 | GL2PSDLL_API GLint gl2psPointSize(GLfloat value) |
---|
5962 | { |
---|
5963 | if(!gl2ps) return GL2PS_UNINITIALIZED; |
---|
5964 | |
---|
5965 | glPassThrough(GL2PS_POINT_SIZE_TOKEN); |
---|
5966 | glPassThrough(value); |
---|
5967 | |
---|
5968 | return GL2PS_SUCCESS; |
---|
5969 | } |
---|
5970 | |
---|
5971 | GL2PSDLL_API GLint gl2psLineWidth(GLfloat value) |
---|
5972 | { |
---|
5973 | if(!gl2ps) return GL2PS_UNINITIALIZED; |
---|
5974 | |
---|
5975 | glPassThrough(GL2PS_LINE_WIDTH_TOKEN); |
---|
5976 | glPassThrough(value); |
---|
5977 | |
---|
5978 | return GL2PS_SUCCESS; |
---|
5979 | } |
---|
5980 | |
---|
5981 | GL2PSDLL_API GLint gl2psBlendFunc(GLenum sfactor, GLenum dfactor) |
---|
5982 | { |
---|
5983 | if(!gl2ps) return GL2PS_UNINITIALIZED; |
---|
5984 | |
---|
5985 | if(GL_FALSE == gl2psSupportedBlendMode(sfactor, dfactor)) |
---|
5986 | return GL2PS_WARNING; |
---|
5987 | |
---|
5988 | glPassThrough(GL2PS_SRC_BLEND_TOKEN); |
---|
5989 | glPassThrough((GLfloat)sfactor); |
---|
5990 | glPassThrough(GL2PS_DST_BLEND_TOKEN); |
---|
5991 | glPassThrough((GLfloat)dfactor); |
---|
5992 | |
---|
5993 | return GL2PS_SUCCESS; |
---|
5994 | } |
---|
5995 | |
---|
5996 | GL2PSDLL_API GLint gl2psSetOptions(GLint options) |
---|
5997 | { |
---|
5998 | if(!gl2ps) return GL2PS_UNINITIALIZED; |
---|
5999 | |
---|
6000 | gl2ps->options = options; |
---|
6001 | |
---|
6002 | return GL2PS_SUCCESS; |
---|
6003 | } |
---|
6004 | |
---|
6005 | GL2PSDLL_API GLint gl2psGetOptions(GLint *options) |
---|
6006 | { |
---|
6007 | if(!gl2ps) { |
---|
6008 | *options = 0; |
---|
6009 | return GL2PS_UNINITIALIZED; |
---|
6010 | } |
---|
6011 | |
---|
6012 | *options = gl2ps->options; |
---|
6013 | |
---|
6014 | return GL2PS_SUCCESS; |
---|
6015 | } |
---|
6016 | |
---|
6017 | GL2PSDLL_API const char *gl2psGetFileExtension(GLint format) |
---|
6018 | { |
---|
6019 | if(format >= 0 && format < (GLint)(sizeof(gl2psbackends) / sizeof(gl2psbackends[0]))) |
---|
6020 | return gl2psbackends[format]->file_extension; |
---|
6021 | else |
---|
6022 | return "Unknown format"; |
---|
6023 | } |
---|
6024 | |
---|
6025 | GL2PSDLL_API const char *gl2psGetFormatDescription(GLint format) |
---|
6026 | { |
---|
6027 | if(format >= 0 && format < (GLint)(sizeof(gl2psbackends) / sizeof(gl2psbackends[0]))) |
---|
6028 | return gl2psbackends[format]->description; |
---|
6029 | else |
---|
6030 | return "Unknown format"; |
---|
6031 | } |
---|