1 | // |
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2 | // ******************************************************************** |
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3 | // * License and Disclaimer * |
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4 | // * * |
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5 | // * The Geant4 software is copyright of the Copyright Holders of * |
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6 | // * the Geant4 Collaboration. It is provided under the terms and * |
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7 | // * conditions of the Geant4 Software License, included in the file * |
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8 | // * LICENSE and available at http://cern.ch/geant4/license . These * |
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9 | // * include a list of copyright holders. * |
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10 | // * * |
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11 | // * Neither the authors of this software system, nor their employing * |
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12 | // * institutes,nor the agencies providing financial support for this * |
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13 | // * work make any representation or warranty, express or implied, * |
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14 | // * regarding this software system or assume any liability for its * |
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15 | // * use. Please see the license in the file LICENSE and URL above * |
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16 | // * for the full disclaimer and the limitation of liability. * |
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17 | // * * |
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18 | // * This code implementation is the result of the scientific and * |
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19 | // * technical work of the GEANT4 collaboration. * |
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20 | // * By using, copying, modifying or distributing the software (or * |
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21 | // * any work based on the software) you agree to acknowledge its * |
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22 | // * use in resulting scientific publications, and indicate your * |
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23 | // * acceptance of all terms of the Geant4 Software license. * |
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24 | // ******************************************************************** |
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25 | // |
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26 | #ifdef G4VIS_BUILD_OI_DRIVER |
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27 | |
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28 | /* |
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29 | * GL2PS, an OpenGL to PostScript Printing Library |
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30 | * Copyright (C) 1999-2003 Christophe Geuzaine |
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31 | * |
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32 | * $Id: gl2ps.cc,v 1.12 2008/04/30 10:05:31 allison Exp $ |
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33 | * |
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34 | * E-mail: geuz@geuz.org |
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35 | * URL: http://www.geuz.org/gl2ps/ |
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36 | * |
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37 | * This library is free software; you can redistribute it and/or |
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38 | * modify it under the terms of the GNU Library General Public |
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39 | * License as published by the Free Software Foundation; either |
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40 | * version 2 of the License, or (at your option) any later version. |
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41 | * |
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42 | * This library is distributed in the hope that it will be useful, |
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43 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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44 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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45 | * Library General Public License for more details. |
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46 | * |
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47 | * You should have received a copy of the GNU Library General Public |
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48 | * License along with this library; if not, write to the Free |
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49 | * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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50 | * |
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51 | */ |
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52 | |
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53 | #include <string.h> |
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54 | #include <sys/types.h> |
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55 | #include <stdarg.h> |
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56 | #include <time.h> |
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57 | #include "Geant4_gl2ps.h" |
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58 | |
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59 | /* The gl2ps context. gl2ps is not thread safe (we should create a |
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60 | local GL2PScontext during gl2psBeginPage). */ |
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61 | |
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62 | GL2PScontext *gl2ps = NULL; |
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63 | |
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64 | /* Some 'system' utility routines */ |
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65 | |
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66 | void gl2psMsg(GLint level, const char *fmt, ...){ |
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67 | va_list args; |
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68 | |
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69 | if(!(gl2ps->options & GL2PS_SILENT)){ |
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70 | switch(level){ |
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71 | case GL2PS_INFO : fprintf(stderr, "GL2PS info: "); break; |
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72 | case GL2PS_WARNING : fprintf(stderr, "GL2PS warning: "); break; |
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73 | case GL2PS_ERROR : fprintf(stderr, "GL2PS error: "); break; |
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74 | } |
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75 | va_start(args, fmt); |
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76 | vfprintf(stderr, fmt, args); |
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77 | va_end(args); |
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78 | fprintf(stderr, "\n"); |
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79 | } |
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80 | /* |
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81 | if(level == GL2PS_ERROR) exit(1); |
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82 | */ |
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83 | } |
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84 | |
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85 | void *gl2psMalloc(size_t size){ |
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86 | void *ptr; |
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87 | |
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88 | if(!size) return(NULL); |
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89 | ptr = malloc(size); |
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90 | if(!ptr){ |
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91 | gl2psMsg(GL2PS_ERROR, "Couldn't allocate requested memory"); |
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92 | exit(1); |
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93 | } |
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94 | return(ptr); |
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95 | } |
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96 | |
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97 | void *gl2psRealloc(void *ptr, size_t size){ |
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98 | if(!size) return(NULL); |
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99 | ptr = realloc(ptr, size); |
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100 | if(!ptr){ |
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101 | gl2psMsg(GL2PS_ERROR, "Couldn't reallocate requested memory"); |
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102 | exit(1); |
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103 | } |
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104 | return(ptr); |
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105 | } |
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106 | |
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107 | void gl2psFree(void *ptr){ |
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108 | if(!ptr) return; |
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109 | free(ptr); |
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110 | } |
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111 | |
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112 | /* The list handling routines */ |
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113 | |
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114 | void gl2psListRealloc(GL2PSlist *list, GLint n){ |
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115 | if(n <= 0) return; |
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116 | if(!list->array){ |
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117 | list->nmax = ((n - 1) / list->incr + 1) * list->incr; |
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118 | list->array = (char *)gl2psMalloc(list->nmax * list->size); |
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119 | } |
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120 | else{ |
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121 | if(n > list->nmax){ |
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122 | list->nmax = ((n - 1) / list->incr + 1) * list->incr; |
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123 | list->array = (char *)gl2psRealloc(list->array, |
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124 | list->nmax * list->size); |
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125 | } |
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126 | } |
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127 | } |
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128 | |
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129 | GL2PSlist *gl2psListCreate(GLint n, GLint incr, GLint size){ |
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130 | GL2PSlist *list; |
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131 | |
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132 | if(n < 0) n = 0; |
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133 | if(incr <= 0) incr = 1; |
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134 | list = (GL2PSlist *)gl2psMalloc(sizeof(GL2PSlist)); |
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135 | list->nmax = 0; |
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136 | list->incr = incr; |
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137 | list->size = size; |
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138 | list->n = 0; |
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139 | list->array = NULL; |
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140 | gl2psListRealloc(list, n); |
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141 | return(list); |
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142 | } |
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143 | |
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144 | void gl2psListReset(GL2PSlist *list){ |
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145 | list->n = 0; |
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146 | } |
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147 | |
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148 | void gl2psListDelete(GL2PSlist *list){ |
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149 | gl2psFree(list->array); |
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150 | gl2psFree(list); |
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151 | } |
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152 | |
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153 | void gl2psListAdd(GL2PSlist *list, void *data){ |
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154 | list->n++; |
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155 | gl2psListRealloc(list, list->n); |
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156 | memcpy(&list->array[(list->n - 1) * list->size], data, list->size); |
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157 | } |
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158 | |
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159 | GLint gl2psListNbr(GL2PSlist *list){ |
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160 | return(list->n); |
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161 | } |
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162 | |
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163 | void *gl2psListPointer(GL2PSlist *list, GLint index){ |
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164 | if((index < 0) || (index >= list->n)){ |
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165 | gl2psMsg(GL2PS_ERROR, "Wrong list index in gl2psListPointer"); |
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166 | return(&list->array[0]); |
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167 | } |
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168 | return(&list->array[index * list->size]); |
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169 | } |
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170 | |
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171 | void gl2psListSort(GL2PSlist *list, |
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172 | int (*fcmp)(const void *a, const void *b)){ |
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173 | qsort(list->array, list->n, list->size, fcmp); |
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174 | } |
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175 | |
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176 | void gl2psListAction(GL2PSlist *list, |
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177 | void (*action)(void *data, void *dummy)){ |
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178 | GLint i, dummy; |
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179 | |
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180 | for(i = 0; i < gl2psListNbr(list); i++){ |
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181 | (*action)(gl2psListPointer(list, i), &dummy); |
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182 | } |
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183 | } |
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184 | |
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185 | void gl2psListActionInverse(GL2PSlist *list, |
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186 | void (*action)(void *data, void *dummy)){ |
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187 | GLint i, dummy; |
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188 | |
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189 | for(i = gl2psListNbr(list); i > 0; i--){ |
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190 | (*action)(gl2psListPointer(list, i-1), &dummy); |
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191 | } |
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192 | } |
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193 | |
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194 | /* The 3D sorting routines */ |
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195 | |
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196 | GLfloat gl2psComparePointPlane(GL2PSxyz point, GL2PSplane plane){ |
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197 | return(plane[0] * point[0] + |
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198 | plane[1] * point[1] + |
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199 | plane[2] * point[2] + |
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200 | plane[3]); |
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201 | } |
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202 | |
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203 | GLfloat gl2psPsca(GLfloat *a, GLfloat *b){ |
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204 | return(a[0]*b[0] + a[1]*b[1] + a[2]*b[2]); |
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205 | } |
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206 | |
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207 | void gl2psPvec(GLfloat *a, GLfloat *b, GLfloat *c){ |
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208 | c[0] = a[1]*b[2] - a[2]*b[1]; |
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209 | c[1] = a[2]*b[0] - a[0]*b[2]; |
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210 | c[2] = a[0]*b[1] - a[1]*b[0]; |
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211 | } |
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212 | |
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213 | GLfloat gl2psNorm(GLfloat *a){ |
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214 | return std::sqrt(a[0]*a[0] + a[1]*a[1] + a[2]*a[2]); |
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215 | } |
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216 | |
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217 | void gl2psGetNormal(GLfloat *a, GLfloat *b, GLfloat *c){ |
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218 | GLfloat norm; |
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219 | |
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220 | gl2psPvec(a, b, c); |
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221 | if(!GL2PS_ZERO(norm = gl2psNorm(c))){ |
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222 | c[0] = c[0] / norm; |
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223 | c[1] = c[1] / norm; |
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224 | c[2] = c[2] / norm; |
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225 | } |
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226 | else{ |
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227 | /* The plane is still wrong, despite our tests in |
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228 | gl2psGetPlane... Let's return a dummy value (this is a hack: we |
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229 | should do more tests in GetPlane): */ |
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230 | c[0] = c[1] = 0.; |
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231 | c[2] = 1.; |
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232 | } |
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233 | } |
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234 | |
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235 | void gl2psGetPlane(GL2PSprimitive *prim, GL2PSplane plane){ |
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236 | GL2PSxyz v = {0., 0., 0.}, w = {0., 0., 0.}; |
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237 | |
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238 | switch(prim->type){ |
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239 | case GL2PS_TRIANGLE : |
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240 | case GL2PS_QUADRANGLE : |
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241 | v[0] = prim->verts[1].xyz[0] - prim->verts[0].xyz[0]; |
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242 | v[1] = prim->verts[1].xyz[1] - prim->verts[0].xyz[1]; |
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243 | v[2] = prim->verts[1].xyz[2] - prim->verts[0].xyz[2]; |
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244 | w[0] = prim->verts[2].xyz[0] - prim->verts[0].xyz[0]; |
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245 | w[1] = prim->verts[2].xyz[1] - prim->verts[0].xyz[1]; |
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246 | w[2] = prim->verts[2].xyz[2] - prim->verts[0].xyz[2]; |
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247 | if((GL2PS_ZERO(v[0]) && GL2PS_ZERO(v[1]) && GL2PS_ZERO(v[2])) || |
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248 | (GL2PS_ZERO(w[0]) && GL2PS_ZERO(w[1]) && GL2PS_ZERO(w[2]))){ |
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249 | plane[0] = plane[1] = 0.; |
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250 | plane[2] = 1.; |
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251 | plane[3] = -prim->verts[0].xyz[2]; |
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252 | } |
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253 | else{ |
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254 | gl2psGetNormal(v, w, plane); |
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255 | plane[3] = |
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256 | - plane[0] * prim->verts[0].xyz[0] |
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257 | - plane[1] * prim->verts[0].xyz[1] |
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258 | - plane[2] * prim->verts[0].xyz[2]; |
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259 | } |
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260 | break; |
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261 | case GL2PS_LINE : |
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262 | v[0] = prim->verts[1].xyz[0] - prim->verts[0].xyz[0]; |
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263 | v[1] = prim->verts[1].xyz[1] - prim->verts[0].xyz[1]; |
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264 | v[2] = prim->verts[1].xyz[2] - prim->verts[0].xyz[2]; |
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265 | if(GL2PS_ZERO(v[0]) && GL2PS_ZERO(v[1]) && GL2PS_ZERO(v[2])){ |
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266 | plane[0] = plane[1] = 0.; |
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267 | plane[2] = 1.; |
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268 | plane[3] = -prim->verts[0].xyz[2]; |
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269 | } |
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270 | else{ |
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271 | if(GL2PS_ZERO(v[0])) w[0] = 1.; |
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272 | else if(GL2PS_ZERO(v[1])) w[1] = 1.; |
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273 | else w[2] = 1.; |
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274 | gl2psGetNormal(v, w, plane); |
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275 | plane[3] = |
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276 | - plane[0] * prim->verts[0].xyz[0] |
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277 | - plane[1] * prim->verts[0].xyz[1] |
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278 | - plane[2] * prim->verts[0].xyz[2]; |
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279 | } |
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280 | break; |
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281 | case GL2PS_POINT : |
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282 | case GL2PS_PIXMAP : |
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283 | case GL2PS_TEXT : |
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284 | plane[0] = plane[1] = 0.; |
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285 | plane[2] = 1.; |
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286 | plane[3] = -prim->verts[0].xyz[2]; |
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287 | break; |
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288 | default : |
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289 | gl2psMsg(GL2PS_ERROR, "Unknown primitive type in BSP tree"); |
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290 | plane[0] = plane[1] = plane[3] = 0.; |
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291 | plane[2] = 1.; |
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292 | break; |
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293 | } |
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294 | } |
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295 | |
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296 | void gl2psCutEdge(GL2PSvertex *a, GL2PSvertex *b, GL2PSplane plane, |
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297 | GL2PSvertex *c){ |
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298 | GL2PSxyz v; |
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299 | GLfloat sect; |
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300 | |
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301 | v[0] = b->xyz[0] - a->xyz[0]; |
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302 | v[1] = b->xyz[1] - a->xyz[1]; |
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303 | v[2] = b->xyz[2] - a->xyz[2]; |
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304 | sect = - gl2psComparePointPlane(a->xyz, plane) / gl2psPsca(plane, v); |
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305 | |
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306 | c->xyz[0] = a->xyz[0] + v[0] * sect; |
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307 | c->xyz[1] = a->xyz[1] + v[1] * sect; |
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308 | c->xyz[2] = a->xyz[2] + v[2] * sect; |
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309 | |
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310 | c->rgba[0] = (1.-sect) * a->rgba[0] + sect * b->rgba[0]; |
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311 | c->rgba[1] = (1.-sect) * a->rgba[1] + sect * b->rgba[1]; |
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312 | c->rgba[2] = (1.-sect) * a->rgba[2] + sect * b->rgba[2]; |
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313 | c->rgba[3] = (1.-sect) * a->rgba[3] + sect * b->rgba[3]; |
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314 | } |
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315 | |
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316 | void gl2psCreateSplitPrimitive(GL2PSprimitive *parent, GL2PSplane plane, |
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317 | GL2PSprimitive *child, GLshort numverts, |
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318 | GLshort *index0, GLshort *index1){ |
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319 | GLshort i; |
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320 | |
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321 | if(numverts > 4){ |
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322 | gl2psMsg(GL2PS_WARNING, "%d vertices in polygon", numverts); |
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323 | numverts = 4; |
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324 | } |
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325 | |
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326 | switch(numverts){ |
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327 | case 1 : child->type = GL2PS_POINT; break; |
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328 | case 2 : child->type = GL2PS_LINE; break; |
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329 | case 3 : child->type = GL2PS_TRIANGLE; break; |
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330 | case 4 : child->type = GL2PS_QUADRANGLE; break; |
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331 | } |
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332 | child->boundary = 0; /* not done! */ |
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333 | child->depth = parent->depth; /* should not be used in this case */ |
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334 | child->culled = parent->culled; |
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335 | child->dash = parent->dash; |
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336 | child->width = parent->width; |
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337 | child->numverts = numverts; |
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338 | child->verts = (GL2PSvertex *)gl2psMalloc(numverts * sizeof(GL2PSvertex)); |
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339 | |
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340 | for(i = 0; i < numverts; i++){ |
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341 | if(index1[i] < 0){ |
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342 | child->verts[i] = parent->verts[index0[i]]; |
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343 | } |
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344 | else{ |
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345 | gl2psCutEdge(&parent->verts[index0[i]], &parent->verts[index1[i]], |
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346 | plane, &child->verts[i]); |
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347 | } |
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348 | } |
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349 | } |
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350 | |
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351 | void gl2psAddIndex(GLshort *index0, GLshort *index1, GLshort *nb, |
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352 | GLshort i, GLshort j){ |
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353 | GLint k; |
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354 | |
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355 | for(k = 0; k < *nb; k++){ |
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356 | if((index0[k] == i && index1[k] == j) || |
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357 | (index1[k] == i && index0[k] == j)) return; |
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358 | } |
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359 | index0[*nb] = i; |
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360 | index1[*nb] = j; |
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361 | (*nb)++; |
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362 | } |
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363 | |
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364 | GLshort gl2psGetIndex(GLshort i, GLshort num){ |
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365 | return(i < num-1) ? i+1 : 0; |
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366 | } |
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367 | |
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368 | GLint gl2psTestSplitPrimitive(GL2PSprimitive *prim, GL2PSplane plane){ |
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369 | GLint type = GL2PS_COINCIDENT; |
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370 | GLshort i, j; |
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371 | GLfloat d[5]; |
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372 | |
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373 | for(i = 0; i < prim->numverts; i++){ |
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374 | d[i] = gl2psComparePointPlane(prim->verts[i].xyz, plane); |
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375 | } |
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376 | |
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377 | if(prim->numverts < 2){ |
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378 | return 0; |
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379 | } |
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380 | else{ |
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381 | for(i = 0; i < prim->numverts; i++){ |
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382 | j = gl2psGetIndex(i, prim->numverts); |
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383 | if(d[j] > GL2PS_EPSILON){ |
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384 | if(type == GL2PS_COINCIDENT) type = GL2PS_IN_BACK_OF; |
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385 | else if(type != GL2PS_IN_BACK_OF) return 1; |
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386 | if(d[i] < -GL2PS_EPSILON) return 1; |
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387 | } |
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388 | else if(d[j] < -GL2PS_EPSILON){ |
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389 | if(type == GL2PS_COINCIDENT) type = GL2PS_IN_FRONT_OF; |
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390 | else if(type != GL2PS_IN_FRONT_OF) return 1; |
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391 | if(d[i] > GL2PS_EPSILON) return 1; |
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392 | } |
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393 | } |
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394 | } |
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395 | return 0; |
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396 | } |
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397 | |
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398 | GLint gl2psSplitPrimitive(GL2PSprimitive *prim, GL2PSplane plane, |
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399 | GL2PSprimitive **front, GL2PSprimitive **back){ |
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400 | GLshort i, j, in=0, out=0, in0[5], in1[5], out0[5], out1[5]; |
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401 | GLint type; |
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402 | GLfloat d[5]; |
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403 | |
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404 | type = GL2PS_COINCIDENT; |
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405 | |
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406 | for(i = 0; i < prim->numverts; i++){ |
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407 | d[i] = gl2psComparePointPlane(prim->verts[i].xyz, plane); |
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408 | } |
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409 | |
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410 | switch(prim->type){ |
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411 | case GL2PS_POINT : |
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412 | if(d[0] > GL2PS_EPSILON) type = GL2PS_IN_BACK_OF; |
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413 | else if(d[0] < -GL2PS_EPSILON) type = GL2PS_IN_FRONT_OF; |
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414 | else type = GL2PS_COINCIDENT; |
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415 | break; |
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416 | default : |
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417 | for(i = 0; i < prim->numverts; i++){ |
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418 | j = gl2psGetIndex(i, prim->numverts); |
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419 | if(d[j] > GL2PS_EPSILON){ |
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420 | if(type == GL2PS_COINCIDENT) type = GL2PS_IN_BACK_OF; |
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421 | else if(type != GL2PS_IN_BACK_OF) type = GL2PS_SPANNING; |
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422 | if(d[i] < -GL2PS_EPSILON){ |
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423 | gl2psAddIndex(in0, in1, &in, i, j); |
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424 | gl2psAddIndex(out0, out1, &out, i, j); |
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425 | type = GL2PS_SPANNING; |
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426 | } |
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427 | gl2psAddIndex(out0, out1, &out, j, -1); |
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428 | } |
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429 | else if(d[j] < -GL2PS_EPSILON){ |
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430 | if(type == GL2PS_COINCIDENT) type = GL2PS_IN_FRONT_OF; |
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431 | else if(type != GL2PS_IN_FRONT_OF) type = GL2PS_SPANNING; |
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432 | if(d[i] > GL2PS_EPSILON){ |
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433 | gl2psAddIndex(in0, in1, &in, i, j); |
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434 | gl2psAddIndex(out0, out1, &out, i, j); |
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435 | type = GL2PS_SPANNING; |
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436 | } |
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437 | gl2psAddIndex(in0, in1, &in, j, -1); |
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438 | } |
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439 | else{ |
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440 | gl2psAddIndex(in0, in1, &in, j, -1); |
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441 | gl2psAddIndex(out0, out1, &out, j, -1); |
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442 | } |
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443 | } |
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444 | break; |
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445 | } |
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446 | |
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447 | if(type == GL2PS_SPANNING){ |
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448 | *back = (GL2PSprimitive*)gl2psMalloc(sizeof(GL2PSprimitive)); |
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449 | *front = (GL2PSprimitive*)gl2psMalloc(sizeof(GL2PSprimitive)); |
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450 | gl2psCreateSplitPrimitive(prim, plane, *back, out, out0, out1); |
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451 | gl2psCreateSplitPrimitive(prim, plane, *front, in, in0, in1); |
---|
452 | } |
---|
453 | |
---|
454 | return type; |
---|
455 | } |
---|
456 | |
---|
457 | void gl2psDivideQuad(GL2PSprimitive *quad, |
---|
458 | GL2PSprimitive **t1, GL2PSprimitive **t2){ |
---|
459 | *t1 = (GL2PSprimitive*)gl2psMalloc(sizeof(GL2PSprimitive)); |
---|
460 | *t2 = (GL2PSprimitive*)gl2psMalloc(sizeof(GL2PSprimitive)); |
---|
461 | (*t1)->type = (*t2)->type = GL2PS_TRIANGLE; |
---|
462 | (*t1)->numverts = (*t2)->numverts = 3; |
---|
463 | (*t1)->depth = (*t2)->depth = quad->depth; |
---|
464 | (*t1)->culled = (*t2)->culled = quad->culled; |
---|
465 | (*t1)->dash = (*t2)->dash = quad->dash; |
---|
466 | (*t1)->width = (*t2)->width = quad->width; |
---|
467 | (*t1)->verts = (GL2PSvertex *)gl2psMalloc(3 * sizeof(GL2PSvertex)); |
---|
468 | (*t2)->verts = (GL2PSvertex *)gl2psMalloc(3 * sizeof(GL2PSvertex)); |
---|
469 | (*t1)->verts[0] = quad->verts[0]; |
---|
470 | (*t1)->verts[1] = quad->verts[1]; |
---|
471 | (*t1)->verts[2] = quad->verts[2]; |
---|
472 | (*t1)->boundary = ((quad->boundary & 1) ? 1 : 0) | ((quad->boundary & 2) ? 2 : 0); |
---|
473 | (*t2)->verts[0] = quad->verts[0]; |
---|
474 | (*t2)->verts[1] = quad->verts[2]; |
---|
475 | (*t2)->verts[2] = quad->verts[3]; |
---|
476 | (*t1)->boundary = ((quad->boundary & 4) ? 2 : 0) | ((quad->boundary & 4) ? 2 : 0); |
---|
477 | } |
---|
478 | |
---|
479 | int gl2psCompareDepth(const void *a, const void *b){ |
---|
480 | GL2PSprimitive *q, *w; |
---|
481 | GLfloat diff; |
---|
482 | |
---|
483 | q = *(GL2PSprimitive**)a; |
---|
484 | w = *(GL2PSprimitive**)b; |
---|
485 | diff = q->depth - w->depth; |
---|
486 | if(diff > 0.){ |
---|
487 | return 1; |
---|
488 | } |
---|
489 | else if(diff < 0.){ |
---|
490 | return -1; |
---|
491 | } |
---|
492 | else{ |
---|
493 | return 0; |
---|
494 | } |
---|
495 | } |
---|
496 | |
---|
497 | int gl2psTrianglesFirst(const void *a, const void *b){ |
---|
498 | GL2PSprimitive *q, *w; |
---|
499 | |
---|
500 | q = *(GL2PSprimitive**)a; |
---|
501 | w = *(GL2PSprimitive**)b; |
---|
502 | return(q->type < w->type ? 1 : -1); |
---|
503 | } |
---|
504 | |
---|
505 | GLint gl2psFindRoot(GL2PSlist *primitives, GL2PSprimitive **root){ |
---|
506 | GLint i, j, count, best = 1000000, index = 0; |
---|
507 | GL2PSprimitive *prim1, *prim2; |
---|
508 | GL2PSplane plane; |
---|
509 | GLint maxp; |
---|
510 | |
---|
511 | if(gl2ps->options & GL2PS_BEST_ROOT){ |
---|
512 | *root = *(GL2PSprimitive**)gl2psListPointer(primitives, 0); |
---|
513 | maxp = gl2psListNbr(primitives); |
---|
514 | if(maxp > gl2ps->maxbestroot){ |
---|
515 | maxp = gl2ps->maxbestroot; |
---|
516 | } |
---|
517 | for(i = 0; i < maxp; i++){ |
---|
518 | prim1 = *(GL2PSprimitive**)gl2psListPointer(primitives, i); |
---|
519 | gl2psGetPlane(prim1, plane); |
---|
520 | count = 0; |
---|
521 | for(j = 0; j < gl2psListNbr(primitives); j++){ |
---|
522 | if(j != i){ |
---|
523 | prim2 = *(GL2PSprimitive**)gl2psListPointer(primitives, j); |
---|
524 | count += gl2psTestSplitPrimitive(prim2, plane); |
---|
525 | } |
---|
526 | if(count > best) break; |
---|
527 | } |
---|
528 | if(count < best){ |
---|
529 | best = count; |
---|
530 | index = i; |
---|
531 | *root = prim1; |
---|
532 | if(!count) return index; |
---|
533 | } |
---|
534 | } |
---|
535 | /* if(index) gl2psMsg(GL2PS_INFO, "GL2PS_BEST_ROOT was worth it: %d", index); */ |
---|
536 | return index; |
---|
537 | } |
---|
538 | else{ |
---|
539 | *root = *(GL2PSprimitive**)gl2psListPointer(primitives, 0); |
---|
540 | return 0; |
---|
541 | } |
---|
542 | } |
---|
543 | |
---|
544 | void gl2psFreePrimitive(void *a, void *){ |
---|
545 | GL2PSprimitive *q; |
---|
546 | |
---|
547 | q = *(GL2PSprimitive**)a; |
---|
548 | gl2psFree(q->verts); |
---|
549 | if(q->type == GL2PS_TEXT){ |
---|
550 | gl2psFree(q->text->str); |
---|
551 | gl2psFree(q->text->fontname); |
---|
552 | gl2psFree(q->text); |
---|
553 | } |
---|
554 | if(q->type == GL2PS_PIXMAP){ |
---|
555 | gl2psFree(q->image->pixels); |
---|
556 | gl2psFree(q->image); |
---|
557 | } |
---|
558 | gl2psFree(q); |
---|
559 | } |
---|
560 | |
---|
561 | void gl2psAddPrimitiveInList(GL2PSprimitive *prim, GL2PSlist *list){ |
---|
562 | GL2PSprimitive *t1, *t2; |
---|
563 | |
---|
564 | if(prim->type != GL2PS_QUADRANGLE){ |
---|
565 | gl2psListAdd(list, &prim); |
---|
566 | } |
---|
567 | else{ |
---|
568 | gl2psDivideQuad(prim, &t1, &t2); |
---|
569 | gl2psListAdd(list, &t1); |
---|
570 | gl2psListAdd(list, &t2); |
---|
571 | gl2psFreePrimitive(&prim, NULL); |
---|
572 | } |
---|
573 | |
---|
574 | } |
---|
575 | |
---|
576 | void gl2psFreeBspTree(GL2PSbsptree **tree){ |
---|
577 | if(*tree){ |
---|
578 | if((*tree)->back) gl2psFreeBspTree(&(*tree)->back); |
---|
579 | if((*tree)->primitives){ |
---|
580 | gl2psListAction((*tree)->primitives, gl2psFreePrimitive); |
---|
581 | gl2psListDelete((*tree)->primitives); |
---|
582 | } |
---|
583 | if((*tree)->front) gl2psFreeBspTree(&(*tree)->front); |
---|
584 | gl2psFree(*tree); |
---|
585 | *tree = NULL; |
---|
586 | } |
---|
587 | } |
---|
588 | |
---|
589 | GLboolean gl2psGreater(GLfloat f1, GLfloat f2){ |
---|
590 | if(f1 > f2) return 1; |
---|
591 | else return 0; |
---|
592 | } |
---|
593 | |
---|
594 | GLboolean gl2psLess(GLfloat f1, GLfloat f2){ |
---|
595 | if(f1 < f2) return 1; |
---|
596 | else return 0; |
---|
597 | } |
---|
598 | |
---|
599 | void gl2psBuildBspTree(GL2PSbsptree *tree, GL2PSlist *primitives){ |
---|
600 | GL2PSprimitive *prim, *frontprim, *backprim; |
---|
601 | GL2PSlist *frontlist, *backlist; |
---|
602 | GLint i, index; |
---|
603 | |
---|
604 | tree->front = NULL; |
---|
605 | tree->back = NULL; |
---|
606 | tree->primitives = gl2psListCreate(1, 2, sizeof(GL2PSprimitive*)); |
---|
607 | index = gl2psFindRoot(primitives, &prim); |
---|
608 | gl2psGetPlane(prim, tree->plane); |
---|
609 | gl2psAddPrimitiveInList(prim, tree->primitives); |
---|
610 | |
---|
611 | frontlist = gl2psListCreate(1, 2, sizeof(GL2PSprimitive*)); |
---|
612 | backlist = gl2psListCreate(1, 2, sizeof(GL2PSprimitive*)); |
---|
613 | |
---|
614 | for(i = 0; i < gl2psListNbr(primitives); i++){ |
---|
615 | if(i != index){ |
---|
616 | prim = *(GL2PSprimitive**)gl2psListPointer(primitives,i); |
---|
617 | switch(gl2psSplitPrimitive(prim, tree->plane, &frontprim, &backprim)){ |
---|
618 | case GL2PS_COINCIDENT: |
---|
619 | gl2psAddPrimitiveInList(prim, tree->primitives); |
---|
620 | break; |
---|
621 | case GL2PS_IN_BACK_OF: |
---|
622 | gl2psAddPrimitiveInList(prim, backlist); |
---|
623 | break; |
---|
624 | case GL2PS_IN_FRONT_OF: |
---|
625 | gl2psAddPrimitiveInList(prim, frontlist); |
---|
626 | break; |
---|
627 | case GL2PS_SPANNING: |
---|
628 | gl2psAddPrimitiveInList(backprim, backlist); |
---|
629 | gl2psAddPrimitiveInList(frontprim, frontlist); |
---|
630 | gl2psFreePrimitive(&prim, NULL); |
---|
631 | break; |
---|
632 | } |
---|
633 | } |
---|
634 | } |
---|
635 | |
---|
636 | if(gl2psListNbr(tree->primitives)){ |
---|
637 | gl2psListSort(tree->primitives, gl2psTrianglesFirst); |
---|
638 | } |
---|
639 | |
---|
640 | if(gl2psListNbr(frontlist)){ |
---|
641 | gl2psListSort(frontlist, gl2psTrianglesFirst); |
---|
642 | tree->front = (GL2PSbsptree*)gl2psMalloc(sizeof(GL2PSbsptree)); |
---|
643 | gl2psBuildBspTree(tree->front, frontlist); |
---|
644 | } |
---|
645 | else{ |
---|
646 | gl2psListDelete(frontlist); |
---|
647 | } |
---|
648 | |
---|
649 | if(gl2psListNbr(backlist)){ |
---|
650 | gl2psListSort(backlist, gl2psTrianglesFirst); |
---|
651 | tree->back = (GL2PSbsptree*)gl2psMalloc(sizeof(GL2PSbsptree)); |
---|
652 | gl2psBuildBspTree(tree->back, backlist); |
---|
653 | } |
---|
654 | else{ |
---|
655 | gl2psListDelete(backlist); |
---|
656 | } |
---|
657 | |
---|
658 | gl2psListDelete(primitives); |
---|
659 | } |
---|
660 | |
---|
661 | void gl2psTraverseBspTree(GL2PSbsptree *tree, GL2PSxyz eye, GLfloat epsilon, |
---|
662 | GLboolean (*compare)(GLfloat f1, GLfloat f2), |
---|
663 | void (*action)(void *data, void *dummy)){ |
---|
664 | GLfloat result; |
---|
665 | |
---|
666 | if(!tree) return; |
---|
667 | |
---|
668 | result = gl2psComparePointPlane(eye, tree->plane); |
---|
669 | |
---|
670 | if(compare(result, epsilon)){ |
---|
671 | gl2psTraverseBspTree(tree->back, eye, epsilon, compare, action); |
---|
672 | gl2psListAction(tree->primitives, action); |
---|
673 | gl2psTraverseBspTree(tree->front, eye, epsilon, compare, action); |
---|
674 | } |
---|
675 | else if(compare(-epsilon, result)){ |
---|
676 | gl2psTraverseBspTree(tree->front, eye, epsilon, compare, action); |
---|
677 | gl2psListAction(tree->primitives, action); |
---|
678 | gl2psTraverseBspTree(tree->back, eye, epsilon, compare, action); |
---|
679 | } |
---|
680 | else{ |
---|
681 | gl2psTraverseBspTree(tree->front, eye, epsilon, compare, action); |
---|
682 | gl2psTraverseBspTree(tree->back, eye, epsilon, compare, action); |
---|
683 | } |
---|
684 | } |
---|
685 | |
---|
686 | /* The 2D sorting routines (for occlusion culling) */ |
---|
687 | |
---|
688 | GLint gl2psGetPlaneFromPoints(GL2PSxyz a, GL2PSxyz b, GL2PSplane plane){ |
---|
689 | GLfloat n; |
---|
690 | |
---|
691 | plane[0] = b[1] - a[1]; |
---|
692 | plane[1] = a[0] - b[0]; |
---|
693 | n = std::sqrt(plane[0]*plane[0] + plane[1]*plane[1]); |
---|
694 | plane[2]=0.; |
---|
695 | if(n != 0.){ |
---|
696 | plane[0] /= n; |
---|
697 | plane[1] /= n; |
---|
698 | plane[3] = -plane[0]*a[0]-plane[1]*a[1]; |
---|
699 | return 1; |
---|
700 | } |
---|
701 | else{ |
---|
702 | plane[0] = -1.0; |
---|
703 | plane[1] = 0.; |
---|
704 | plane[3] = a[0]; |
---|
705 | return 0; |
---|
706 | } |
---|
707 | } |
---|
708 | |
---|
709 | void gl2psFreeBspImageTree(GL2PSbsptree2d **tree){ |
---|
710 | if(*tree){ |
---|
711 | if((*tree)->back) gl2psFreeBspImageTree(&(*tree)->back); |
---|
712 | if((*tree)->front) gl2psFreeBspImageTree(&(*tree)->front); |
---|
713 | gl2psFree(*tree); |
---|
714 | *tree = NULL; |
---|
715 | } |
---|
716 | } |
---|
717 | |
---|
718 | GLint gl2psCheckPoint(GL2PSxyz point, GL2PSplane plane){ |
---|
719 | GLfloat pt_dis; |
---|
720 | |
---|
721 | pt_dis = gl2psComparePointPlane(point, plane); |
---|
722 | if(pt_dis > GL2PS_EPSILON) return GL2PS_POINT_INFRONT; |
---|
723 | else if(pt_dis < -GL2PS_EPSILON) return GL2PS_POINT_BACK; |
---|
724 | else return GL2PS_POINT_COINCIDENT; |
---|
725 | } |
---|
726 | |
---|
727 | void gl2psAddPlanesInBspTreeImage(GL2PSprimitive *prim, |
---|
728 | GL2PSbsptree2d **tree){ |
---|
729 | GLint ret = 0; |
---|
730 | GLint i; |
---|
731 | GLint offset = 0; |
---|
732 | GL2PSbsptree2d *head = NULL, *cur = NULL; |
---|
733 | |
---|
734 | if((*tree == NULL) && (prim->numverts > 2)){ |
---|
735 | head = (GL2PSbsptree2d*)gl2psMalloc(sizeof(GL2PSbsptree2d)); |
---|
736 | for(i = 0; i < prim->numverts-1; i++){ |
---|
737 | if(!gl2psGetPlaneFromPoints(prim->verts[i].xyz, |
---|
738 | prim->verts[i+1].xyz, |
---|
739 | head->plane)){ |
---|
740 | if(prim->numverts-i > 3){ |
---|
741 | offset++; |
---|
742 | } |
---|
743 | else{ |
---|
744 | gl2psFree(head); |
---|
745 | return; |
---|
746 | } |
---|
747 | } |
---|
748 | else{ |
---|
749 | break; |
---|
750 | } |
---|
751 | } |
---|
752 | head->back = NULL; |
---|
753 | head->front = NULL; |
---|
754 | for(i = 2+offset; i < prim->numverts; i++){ |
---|
755 | ret = gl2psCheckPoint(prim->verts[i].xyz, head->plane); |
---|
756 | if(ret != GL2PS_POINT_COINCIDENT) break; |
---|
757 | } |
---|
758 | switch(ret){ |
---|
759 | case GL2PS_POINT_INFRONT : |
---|
760 | cur = head; |
---|
761 | for(i = 1+offset; i < prim->numverts-1; i++){ |
---|
762 | if(cur->front == NULL){ |
---|
763 | cur->front = (GL2PSbsptree2d*)gl2psMalloc(sizeof(GL2PSbsptree2d)); |
---|
764 | } |
---|
765 | if(gl2psGetPlaneFromPoints(prim->verts[i].xyz, |
---|
766 | prim->verts[i+1].xyz, |
---|
767 | cur->front->plane)){ |
---|
768 | cur = cur->front; |
---|
769 | cur->front = NULL; |
---|
770 | cur->back = NULL; |
---|
771 | } |
---|
772 | } |
---|
773 | if(cur->front == NULL){ |
---|
774 | cur->front = (GL2PSbsptree2d*)gl2psMalloc(sizeof(GL2PSbsptree2d)); |
---|
775 | } |
---|
776 | if(gl2psGetPlaneFromPoints(prim->verts[i].xyz, |
---|
777 | prim->verts[offset].xyz, |
---|
778 | cur->front->plane)){ |
---|
779 | cur->front->front = NULL; |
---|
780 | cur->front->back = NULL; |
---|
781 | } |
---|
782 | else{ |
---|
783 | gl2psFree(cur->front); |
---|
784 | cur->front = NULL; |
---|
785 | } |
---|
786 | break; |
---|
787 | case GL2PS_POINT_BACK : |
---|
788 | for(i = 0; i < 4; i++){ |
---|
789 | head->plane[i] = -head->plane[i]; |
---|
790 | } |
---|
791 | cur = head; |
---|
792 | for(i = 1+offset; i < prim->numverts-1; i++){ |
---|
793 | if(cur->front == NULL){ |
---|
794 | cur->front = (GL2PSbsptree2d*)gl2psMalloc(sizeof(GL2PSbsptree2d)); |
---|
795 | } |
---|
796 | if(gl2psGetPlaneFromPoints(prim->verts[i+1].xyz, |
---|
797 | prim->verts[i].xyz, |
---|
798 | cur->front->plane)){ |
---|
799 | cur = cur->front; |
---|
800 | cur->front = NULL; |
---|
801 | cur->back = NULL; |
---|
802 | } |
---|
803 | } |
---|
804 | if(cur->front == NULL){ |
---|
805 | cur->front = (GL2PSbsptree2d*)gl2psMalloc(sizeof(GL2PSbsptree2d)); |
---|
806 | } |
---|
807 | if(gl2psGetPlaneFromPoints(prim->verts[offset].xyz, |
---|
808 | prim->verts[i].xyz, |
---|
809 | cur->front->plane)){ |
---|
810 | cur->front->front = NULL; |
---|
811 | cur->front->back = NULL; |
---|
812 | } |
---|
813 | else{ |
---|
814 | gl2psFree(cur->front); |
---|
815 | cur->front = NULL; |
---|
816 | } |
---|
817 | break; |
---|
818 | default: |
---|
819 | gl2psFree(head); |
---|
820 | return; |
---|
821 | } |
---|
822 | (*tree) = head; |
---|
823 | } |
---|
824 | } |
---|
825 | |
---|
826 | GLint gl2psCheckPrimitive(GL2PSprimitive *prim, GL2PSplane plane){ |
---|
827 | GLint i; |
---|
828 | GLint pos; |
---|
829 | |
---|
830 | pos = gl2psCheckPoint(prim->verts[0].xyz, plane); |
---|
831 | for(i = 1; i < prim->numverts; i++){ |
---|
832 | pos |= gl2psCheckPoint(prim->verts[i].xyz, plane); |
---|
833 | if(pos == (GL2PS_POINT_INFRONT | GL2PS_POINT_BACK)) return GL2PS_SPANNING; |
---|
834 | } |
---|
835 | if(pos & GL2PS_POINT_INFRONT) return GL2PS_IN_FRONT_OF; |
---|
836 | else if(pos & GL2PS_POINT_BACK) return GL2PS_IN_BACK_OF; |
---|
837 | else return GL2PS_COINCIDENT; |
---|
838 | } |
---|
839 | |
---|
840 | GL2PSprimitive* gl2psCreateSplitPrimitive2D(GL2PSprimitive *parent, |
---|
841 | GLshort numverts, |
---|
842 | GL2PSvertex *vertx){ |
---|
843 | GLint i; |
---|
844 | GL2PSprimitive *child = (GL2PSprimitive*)gl2psMalloc(sizeof(GL2PSprimitive)); |
---|
845 | |
---|
846 | switch(numverts){ |
---|
847 | case 1 : child->type = GL2PS_POINT; break; |
---|
848 | case 2 : child->type = GL2PS_LINE; break; |
---|
849 | case 3 : child->type = GL2PS_TRIANGLE; break; |
---|
850 | case 4 : child->type = GL2PS_QUADRANGLE; break; |
---|
851 | } |
---|
852 | child->boundary = 0; /* not done! */ |
---|
853 | child->depth = parent->depth; |
---|
854 | child->culled = parent->culled; |
---|
855 | child->dash = parent->dash; |
---|
856 | child->width = parent->width; |
---|
857 | child->numverts = numverts; |
---|
858 | child->verts = (GL2PSvertex *)gl2psMalloc(numverts * sizeof(GL2PSvertex)); |
---|
859 | for(i = 0; i < numverts; i++){ |
---|
860 | child->verts[i] = vertx[i]; |
---|
861 | } |
---|
862 | return child; |
---|
863 | } |
---|
864 | |
---|
865 | void gl2psSplitPrimitive2D(GL2PSprimitive *prim, |
---|
866 | GL2PSplane plane, |
---|
867 | GL2PSprimitive **front, |
---|
868 | GL2PSprimitive **back){ |
---|
869 | |
---|
870 | /* cur will hold the position of current vertex |
---|
871 | prev will holds the position of previous vertex |
---|
872 | prev0 will holds the position of vertex number 0 |
---|
873 | v1 and v2 represent the current and previous vertexs respectively |
---|
874 | flag will represents that should the current be checked against the plane */ |
---|
875 | GLint cur = -1, prev = -1, i, v1 = 0, v2 = 0, flag = 1, prev0 = -1; |
---|
876 | |
---|
877 | /* list of vertexs which will go in front and back Primitive */ |
---|
878 | GL2PSvertex *front_list = NULL, *back_list = NULL; |
---|
879 | |
---|
880 | /* number of vertex in front and back list */ |
---|
881 | GLint front_count = 0, back_count = 0; |
---|
882 | |
---|
883 | for(i = 0; i <= prim->numverts; i++){ |
---|
884 | v1 = i; |
---|
885 | if(v1 == prim->numverts){ |
---|
886 | if(prim->numverts < 3) break; |
---|
887 | v1 = 0; |
---|
888 | v2 = prim->numverts-1; |
---|
889 | cur = prev0; |
---|
890 | } |
---|
891 | else if(flag){ |
---|
892 | cur = gl2psCheckPoint(prim->verts[v1].xyz, plane); |
---|
893 | if(i == 0){ |
---|
894 | prev0 = cur; |
---|
895 | } |
---|
896 | } |
---|
897 | if(((prev == -1) || (prev == cur) || (prev == 0) || (cur == 0)) && |
---|
898 | (i < prim->numverts)){ |
---|
899 | if(cur == GL2PS_POINT_INFRONT){ |
---|
900 | front_count++; |
---|
901 | front_list = (GL2PSvertex*)gl2psRealloc(front_list, |
---|
902 | sizeof(GL2PSvertex)*front_count); |
---|
903 | front_list[front_count-1] = prim->verts[v1]; |
---|
904 | } |
---|
905 | else if(cur == GL2PS_POINT_BACK){ |
---|
906 | back_count++; |
---|
907 | back_list = (GL2PSvertex*)gl2psRealloc(back_list, |
---|
908 | sizeof(GL2PSvertex)*back_count); |
---|
909 | back_list[back_count-1] = prim->verts[v1]; |
---|
910 | } |
---|
911 | else{ |
---|
912 | front_count++; |
---|
913 | front_list = (GL2PSvertex*)gl2psRealloc(front_list, |
---|
914 | sizeof(GL2PSvertex)*front_count); |
---|
915 | front_list[front_count-1] = prim->verts[v1]; |
---|
916 | back_count++; |
---|
917 | back_list = (GL2PSvertex*)gl2psRealloc(back_list, |
---|
918 | sizeof(GL2PSvertex)*back_count); |
---|
919 | back_list[back_count-1] = prim->verts[v1]; |
---|
920 | } |
---|
921 | flag = 1; |
---|
922 | } |
---|
923 | else if((prev != cur) && (cur != 0) && (prev != 0)){ |
---|
924 | if(v1 != 0){ |
---|
925 | v2 = v1-1; |
---|
926 | i--; |
---|
927 | } |
---|
928 | front_count++; |
---|
929 | front_list = (GL2PSvertex*)gl2psRealloc(front_list, |
---|
930 | sizeof(GL2PSvertex)*front_count); |
---|
931 | gl2psCutEdge(&prim->verts[v2], |
---|
932 | &prim->verts[v1], |
---|
933 | plane, |
---|
934 | &front_list[front_count-1]); |
---|
935 | back_count++; |
---|
936 | back_list = (GL2PSvertex*)gl2psRealloc(back_list, |
---|
937 | sizeof(GL2PSvertex)*back_count); |
---|
938 | back_list[back_count-1] = front_list[front_count-1]; |
---|
939 | flag = 0; |
---|
940 | } |
---|
941 | prev = cur; |
---|
942 | } |
---|
943 | *front = gl2psCreateSplitPrimitive2D(prim, front_count, front_list); |
---|
944 | *back = gl2psCreateSplitPrimitive2D(prim, back_count, back_list); |
---|
945 | gl2psFree(front_list); |
---|
946 | gl2psFree(back_list); |
---|
947 | } |
---|
948 | |
---|
949 | GLint gl2psAddInBspImageTree(GL2PSprimitive *prim, GL2PSbsptree2d **tree){ |
---|
950 | GLint ret = 0; |
---|
951 | GL2PSprimitive *frontprim = NULL, *backprim = NULL; |
---|
952 | |
---|
953 | if(*tree == NULL){ |
---|
954 | gl2psAddPlanesInBspTreeImage(prim, tree); |
---|
955 | return 1; |
---|
956 | } |
---|
957 | else{ |
---|
958 | switch(gl2psCheckPrimitive(prim, (*tree)->plane)){ |
---|
959 | case GL2PS_IN_BACK_OF: return gl2psAddInBspImageTree(prim, &(*tree)->back); |
---|
960 | case GL2PS_IN_FRONT_OF: |
---|
961 | if((*tree)->front != NULL) return gl2psAddInBspImageTree(prim, &(*tree)->front); |
---|
962 | else return 0; |
---|
963 | case GL2PS_SPANNING: |
---|
964 | gl2psSplitPrimitive2D(prim, (*tree)->plane, &frontprim, &backprim); |
---|
965 | ret = gl2psAddInBspImageTree(backprim, &(*tree)->back); |
---|
966 | if((*tree)->front != NULL){ |
---|
967 | if(gl2psAddInBspImageTree(frontprim, &(*tree)->front)){ |
---|
968 | ret = 1; |
---|
969 | } |
---|
970 | } |
---|
971 | gl2psFree(frontprim->verts); |
---|
972 | gl2psFree(frontprim); |
---|
973 | gl2psFree(backprim->verts); |
---|
974 | gl2psFree(backprim); |
---|
975 | return ret; |
---|
976 | case GL2PS_COINCIDENT: |
---|
977 | if(prim->numverts < 3) return 1; |
---|
978 | else return 0; |
---|
979 | } |
---|
980 | } |
---|
981 | return 0; |
---|
982 | } |
---|
983 | |
---|
984 | void gl2psAddInImageTree(void *a, void *){ |
---|
985 | GL2PSprimitive *prim = *(GL2PSprimitive **)a; |
---|
986 | |
---|
987 | if(!gl2psAddInBspImageTree(prim, &gl2ps->imagetree)){ |
---|
988 | prim->culled = 1; |
---|
989 | } |
---|
990 | } |
---|
991 | |
---|
992 | /* Boundary contruction */ |
---|
993 | |
---|
994 | void gl2psAddBoundaryInList(GL2PSprimitive *prim, GL2PSlist *list){ |
---|
995 | GL2PSprimitive *b; |
---|
996 | GLshort i; |
---|
997 | GL2PSxyz c; |
---|
998 | |
---|
999 | c[0] = c[1] = c[2] = 0.; |
---|
1000 | for(i = 0; i < prim->numverts; i++){ |
---|
1001 | c[0] += prim->verts[i].xyz[0]; |
---|
1002 | c[1] += prim->verts[i].xyz[1]; |
---|
1003 | } |
---|
1004 | c[0] /= prim->numverts; |
---|
1005 | c[1] /= prim->numverts; |
---|
1006 | |
---|
1007 | for(i = 0; i < prim->numverts; i++){ |
---|
1008 | if(prim->boundary & (GLint)pow(2., i)){ |
---|
1009 | b = (GL2PSprimitive*)gl2psMalloc(sizeof(GL2PSprimitive)); |
---|
1010 | b->type = GL2PS_LINE; |
---|
1011 | b->dash = prim->dash; |
---|
1012 | b->depth = prim->depth; /* this is wrong */ |
---|
1013 | b->culled = prim->culled; |
---|
1014 | b->width = prim->width; |
---|
1015 | b->boundary = 0; |
---|
1016 | b->numverts = 2; |
---|
1017 | b->verts = (GL2PSvertex *)gl2psMalloc(2 * sizeof(GL2PSvertex)); |
---|
1018 | |
---|
1019 | #if 0 /* need to work on boundary offset... */ |
---|
1020 | v[0] = c[0] - prim->verts[i].xyz[0]; |
---|
1021 | v[1] = c[1] - prim->verts[i].xyz[1]; |
---|
1022 | v[2] = 0.; |
---|
1023 | norm = gl2psNorm(v); |
---|
1024 | v[0] /= norm; |
---|
1025 | v[1] /= norm; |
---|
1026 | b->verts[0].xyz[0] = prim->verts[i].xyz[0] +0.1*v[0]; |
---|
1027 | b->verts[0].xyz[1] = prim->verts[i].xyz[1] +0.1*v[1]; |
---|
1028 | b->verts[0].xyz[2] = prim->verts[i].xyz[2]; |
---|
1029 | v[0] = c[0] - prim->verts[gl2psGetIndex(i, prim->numverts)].xyz[0]; |
---|
1030 | v[1] = c[1] - prim->verts[gl2psGetIndex(i, prim->numverts)].xyz[1]; |
---|
1031 | norm = gl2psNorm(v); |
---|
1032 | v[0] /= norm; |
---|
1033 | v[1] /= norm; |
---|
1034 | b->verts[1].xyz[0] = prim->verts[gl2psGetIndex(i, prim->numverts)].xyz[0] +0.1*v[0]; |
---|
1035 | b->verts[1].xyz[1] = prim->verts[gl2psGetIndex(i, prim->numverts)].xyz[1] +0.1*v[1]; |
---|
1036 | b->verts[1].xyz[2] = prim->verts[gl2psGetIndex(i, prim->numverts)].xyz[2]; |
---|
1037 | #else |
---|
1038 | b->verts[0].xyz[0] = prim->verts[i].xyz[0]; |
---|
1039 | b->verts[0].xyz[1] = prim->verts[i].xyz[1]; |
---|
1040 | b->verts[0].xyz[2] = prim->verts[i].xyz[2]; |
---|
1041 | b->verts[1].xyz[0] = prim->verts[gl2psGetIndex(i, prim->numverts)].xyz[0]; |
---|
1042 | b->verts[1].xyz[1] = prim->verts[gl2psGetIndex(i, prim->numverts)].xyz[1]; |
---|
1043 | b->verts[1].xyz[2] = prim->verts[gl2psGetIndex(i, prim->numverts)].xyz[2]; |
---|
1044 | #endif |
---|
1045 | |
---|
1046 | b->verts[0].rgba[0] = 0.; |
---|
1047 | b->verts[0].rgba[1] = 0.; |
---|
1048 | b->verts[0].rgba[2] = 0.; |
---|
1049 | b->verts[0].rgba[3] = 0.; |
---|
1050 | b->verts[1].rgba[0] = 0.; |
---|
1051 | b->verts[1].rgba[1] = 0.; |
---|
1052 | b->verts[1].rgba[2] = 0.; |
---|
1053 | b->verts[1].rgba[3] = 0.; |
---|
1054 | gl2psListAdd(list, &b); |
---|
1055 | } |
---|
1056 | } |
---|
1057 | |
---|
1058 | } |
---|
1059 | |
---|
1060 | void gl2psBuildPolygonBoundary(GL2PSbsptree *tree){ |
---|
1061 | GLint i, n; |
---|
1062 | GL2PSprimitive *prim; |
---|
1063 | |
---|
1064 | if(!tree) return; |
---|
1065 | gl2psBuildPolygonBoundary(tree->back); |
---|
1066 | n = gl2psListNbr(tree->primitives); |
---|
1067 | for(i = 0; i < n; i++){ |
---|
1068 | prim = *(GL2PSprimitive**)gl2psListPointer(tree->primitives, i); |
---|
1069 | if(prim->boundary) gl2psAddBoundaryInList(prim, tree->primitives); |
---|
1070 | } |
---|
1071 | gl2psBuildPolygonBoundary(tree->front); |
---|
1072 | } |
---|
1073 | |
---|
1074 | /* The feedback buffer parser */ |
---|
1075 | |
---|
1076 | void gl2psAddPolyPrimitive(GLshort type, GLshort numverts, |
---|
1077 | GL2PSvertex *verts, GLint offset, |
---|
1078 | char dash, GLfloat width, |
---|
1079 | char boundary){ |
---|
1080 | GLshort i; |
---|
1081 | GLfloat factor, units, area, dZ, dZdX, dZdY, maxdZ; |
---|
1082 | GL2PSprimitive *prim; |
---|
1083 | |
---|
1084 | prim = (GL2PSprimitive *)gl2psMalloc(sizeof(GL2PSprimitive)); |
---|
1085 | prim->type = type; |
---|
1086 | prim->numverts = numverts; |
---|
1087 | prim->verts = (GL2PSvertex *)gl2psMalloc(numverts * sizeof(GL2PSvertex)); |
---|
1088 | memcpy(prim->verts, verts, numverts * sizeof(GL2PSvertex)); |
---|
1089 | prim->boundary = boundary; |
---|
1090 | prim->dash = dash; |
---|
1091 | prim->width = width; |
---|
1092 | prim->culled = 0; |
---|
1093 | |
---|
1094 | if(gl2ps->options & GL2PS_SIMPLE_LINE_OFFSET){ |
---|
1095 | |
---|
1096 | if(type == GL2PS_LINE){ |
---|
1097 | if(gl2ps->sort == GL2PS_SIMPLE_SORT){ |
---|
1098 | prim->verts[0].xyz[2] -= GL2PS_SIMPLE_OFFSET_LARGE; |
---|
1099 | prim->verts[1].xyz[2] -= GL2PS_SIMPLE_OFFSET_LARGE; |
---|
1100 | } |
---|
1101 | else{ |
---|
1102 | prim->verts[0].xyz[2] -= GL2PS_SIMPLE_OFFSET; |
---|
1103 | prim->verts[1].xyz[2] -= GL2PS_SIMPLE_OFFSET; |
---|
1104 | } |
---|
1105 | } |
---|
1106 | |
---|
1107 | } |
---|
1108 | else if(offset && type == GL2PS_TRIANGLE){ |
---|
1109 | |
---|
1110 | /* This needs some more work... */ |
---|
1111 | |
---|
1112 | if(gl2ps->sort == GL2PS_SIMPLE_SORT){ |
---|
1113 | factor = gl2ps->offset[0]; |
---|
1114 | units = gl2ps->offset[1]; |
---|
1115 | } |
---|
1116 | else{ |
---|
1117 | factor = gl2ps->offset[0] / 800.; |
---|
1118 | units = gl2ps->offset[1] / 800.; |
---|
1119 | } |
---|
1120 | |
---|
1121 | area = |
---|
1122 | (prim->verts[1].xyz[0] - prim->verts[0].xyz[0]) * |
---|
1123 | (prim->verts[2].xyz[1] - prim->verts[1].xyz[1]) - |
---|
1124 | (prim->verts[2].xyz[0] - prim->verts[1].xyz[0]) * |
---|
1125 | (prim->verts[1].xyz[1] - prim->verts[0].xyz[1]); |
---|
1126 | dZdX = |
---|
1127 | (prim->verts[2].xyz[1] - prim->verts[1].xyz[1]) * |
---|
1128 | (prim->verts[1].xyz[2] - prim->verts[0].xyz[2]) - |
---|
1129 | (prim->verts[1].xyz[1] - prim->verts[0].xyz[1]) * |
---|
1130 | (prim->verts[2].xyz[2] - prim->verts[1].xyz[2]) / area; |
---|
1131 | dZdY = |
---|
1132 | (prim->verts[1].xyz[0] - prim->verts[0].xyz[0]) * |
---|
1133 | (prim->verts[2].xyz[2] - prim->verts[1].xyz[2]) - |
---|
1134 | (prim->verts[2].xyz[0] - prim->verts[1].xyz[0]) * |
---|
1135 | (prim->verts[1].xyz[2] - prim->verts[0].xyz[2]) / area; |
---|
1136 | |
---|
1137 | maxdZ = std::sqrt(dZdX*dZdX + dZdY*dZdY); |
---|
1138 | |
---|
1139 | dZ = factor * maxdZ + units; |
---|
1140 | |
---|
1141 | prim->verts[0].xyz[2] += dZ; |
---|
1142 | prim->verts[1].xyz[2] += dZ; |
---|
1143 | prim->verts[2].xyz[2] += dZ; |
---|
1144 | } |
---|
1145 | |
---|
1146 | prim->depth = 0.; |
---|
1147 | if(gl2ps->sort == GL2PS_SIMPLE_SORT){ |
---|
1148 | for(i = 0; i < numverts; i++){ |
---|
1149 | prim->depth += prim->verts[i].xyz[2]; |
---|
1150 | } |
---|
1151 | prim->depth /= (GLfloat)numverts; |
---|
1152 | } |
---|
1153 | |
---|
1154 | gl2psListAdd(gl2ps->primitives, &prim); |
---|
1155 | } |
---|
1156 | |
---|
1157 | GLint gl2psGetVertex(GL2PSvertex *v, GLfloat *p){ |
---|
1158 | GLint i; |
---|
1159 | |
---|
1160 | v->xyz[0] = p[0]; |
---|
1161 | v->xyz[1] = p[1]; |
---|
1162 | v->xyz[2] = GL2PS_DEPTH_FACT * p[2]; |
---|
1163 | |
---|
1164 | if(gl2ps->colormode == GL_COLOR_INDEX && gl2ps->colorsize > 0){ |
---|
1165 | i = (GLint)(p[3] + 0.5); |
---|
1166 | v->rgba[0] = gl2ps->colormap[i][0]; |
---|
1167 | v->rgba[1] = gl2ps->colormap[i][1]; |
---|
1168 | v->rgba[2] = gl2ps->colormap[i][2]; |
---|
1169 | v->rgba[3] = gl2ps->colormap[i][3]; |
---|
1170 | return 4; |
---|
1171 | } |
---|
1172 | else{ |
---|
1173 | v->rgba[0] = p[3]; |
---|
1174 | v->rgba[1] = p[4]; |
---|
1175 | v->rgba[2] = p[5]; |
---|
1176 | v->rgba[3] = p[6]; |
---|
1177 | return 7; |
---|
1178 | } |
---|
1179 | } |
---|
1180 | |
---|
1181 | GLint gl2psParseFeedbackBuffer(void){ |
---|
1182 | char flag, dash = 0; |
---|
1183 | GLshort boundary; |
---|
1184 | GLint i, used, count, v, vtot, offset = 0; |
---|
1185 | GLfloat lwidth = 1., psize = 1.; |
---|
1186 | GLfloat *current; |
---|
1187 | GL2PSvertex vertices[3]; |
---|
1188 | |
---|
1189 | used = glRenderMode(GL_RENDER); |
---|
1190 | |
---|
1191 | if(used < 0){ |
---|
1192 | gl2psMsg(GL2PS_INFO, "OpenGL feedback buffer overflow"); |
---|
1193 | return GL2PS_OVERFLOW; |
---|
1194 | } |
---|
1195 | |
---|
1196 | if(used == 0){ |
---|
1197 | /* gl2psMsg(GL2PS_INFO, "Empty feedback buffer"); */ |
---|
1198 | return GL2PS_NO_FEEDBACK; |
---|
1199 | } |
---|
1200 | |
---|
1201 | current = gl2ps->feedback; |
---|
1202 | boundary = gl2ps->boundary = 0; |
---|
1203 | |
---|
1204 | while(used > 0){ |
---|
1205 | |
---|
1206 | if(boundary) gl2ps->boundary = 1; |
---|
1207 | |
---|
1208 | switch((GLint)*current){ |
---|
1209 | case GL_POINT_TOKEN : |
---|
1210 | current ++; |
---|
1211 | used --; |
---|
1212 | i = gl2psGetVertex(&vertices[0], current); |
---|
1213 | current += i; |
---|
1214 | used -= i; |
---|
1215 | gl2psAddPolyPrimitive(GL2PS_POINT, 1, vertices, 0, dash, psize, 0); |
---|
1216 | break; |
---|
1217 | case GL_LINE_TOKEN : |
---|
1218 | case GL_LINE_RESET_TOKEN : |
---|
1219 | current ++; |
---|
1220 | used --; |
---|
1221 | i = gl2psGetVertex(&vertices[0], current); |
---|
1222 | current += i; |
---|
1223 | used -= i; |
---|
1224 | i = gl2psGetVertex(&vertices[1], current); |
---|
1225 | current += i; |
---|
1226 | used -= i; |
---|
1227 | gl2psAddPolyPrimitive(GL2PS_LINE, 2, vertices, 0, dash, lwidth, 0); |
---|
1228 | break; |
---|
1229 | case GL_POLYGON_TOKEN : |
---|
1230 | count = (GLint)current[1]; |
---|
1231 | current += 2; |
---|
1232 | used -= 2; |
---|
1233 | v = vtot = 0; |
---|
1234 | while(count > 0 && used > 0){ |
---|
1235 | i = gl2psGetVertex(&vertices[v], current); |
---|
1236 | current += i; |
---|
1237 | used -= i; |
---|
1238 | count --; |
---|
1239 | vtot++; |
---|
1240 | if(v == 2){ |
---|
1241 | if(boundary){ |
---|
1242 | if(!count && vtot == 2) flag = 1|2|4; |
---|
1243 | else if(!count) flag = 2|4; |
---|
1244 | else if(vtot == 2) flag = 1|2; |
---|
1245 | else flag = 2; |
---|
1246 | } |
---|
1247 | else |
---|
1248 | flag = 0; |
---|
1249 | gl2psAddPolyPrimitive(GL2PS_TRIANGLE, 3, vertices, |
---|
1250 | offset, dash, 1, flag); |
---|
1251 | vertices[1] = vertices[2]; |
---|
1252 | } |
---|
1253 | else |
---|
1254 | v ++; |
---|
1255 | } |
---|
1256 | break; |
---|
1257 | case GL_BITMAP_TOKEN : |
---|
1258 | case GL_DRAW_PIXEL_TOKEN : |
---|
1259 | case GL_COPY_PIXEL_TOKEN : |
---|
1260 | current ++; |
---|
1261 | used --; |
---|
1262 | i = gl2psGetVertex(&vertices[0], current); |
---|
1263 | current += i; |
---|
1264 | used -= i; |
---|
1265 | break; |
---|
1266 | case GL_PASS_THROUGH_TOKEN : |
---|
1267 | switch((GLint)current[1]){ |
---|
1268 | case GL2PS_BEGIN_POLYGON_OFFSET_FILL : offset = 1; break; |
---|
1269 | case GL2PS_END_POLYGON_OFFSET_FILL : offset = 0; break; |
---|
1270 | case GL2PS_BEGIN_POLYGON_BOUNDARY : boundary = 1; break; |
---|
1271 | case GL2PS_END_POLYGON_BOUNDARY : boundary = 0; break; |
---|
1272 | case GL2PS_BEGIN_LINE_STIPPLE : dash = 4; break; |
---|
1273 | case GL2PS_END_LINE_STIPPLE : dash = 0; break; |
---|
1274 | case GL2PS_SET_POINT_SIZE : |
---|
1275 | current += 2; |
---|
1276 | used -= 2; |
---|
1277 | psize = current[1]; |
---|
1278 | break; |
---|
1279 | case GL2PS_SET_LINE_WIDTH : |
---|
1280 | current += 2; |
---|
1281 | used -= 2; |
---|
1282 | lwidth = current[1]; |
---|
1283 | break; |
---|
1284 | } |
---|
1285 | current += 2; |
---|
1286 | used -= 2; |
---|
1287 | break; |
---|
1288 | default : |
---|
1289 | gl2psMsg(GL2PS_WARNING, "Unknown token in buffer"); |
---|
1290 | current ++; |
---|
1291 | used --; |
---|
1292 | break; |
---|
1293 | } |
---|
1294 | } |
---|
1295 | |
---|
1296 | return GL2PS_SUCCESS; |
---|
1297 | } |
---|
1298 | |
---|
1299 | GLboolean gl2psSameColor(GL2PSrgba rgba1, GL2PSrgba rgba2){ |
---|
1300 | return !(rgba1[0] != rgba2[0] || |
---|
1301 | rgba1[1] != rgba2[1] || |
---|
1302 | rgba1[2] != rgba2[2]); |
---|
1303 | } |
---|
1304 | |
---|
1305 | GLboolean gl2psVertsSameColor(const GL2PSprimitive *prim){ |
---|
1306 | int i; |
---|
1307 | |
---|
1308 | for(i = 1; i < prim->numverts; i++){ |
---|
1309 | if(!gl2psSameColor(prim->verts[0].rgba, prim->verts[i].rgba)){ |
---|
1310 | return 0; |
---|
1311 | } |
---|
1312 | } |
---|
1313 | return 1; |
---|
1314 | } |
---|
1315 | |
---|
1316 | GLint gl2psPrintPrimitives(void); |
---|
1317 | |
---|
1318 | /* The PostScript routines. Other (vector) image formats should be |
---|
1319 | easy to generate by creating the three corresponding routines |
---|
1320 | (gl2psPrintXXXHeader, gl2psPrintXXXPrimitive, gl2psPrintXXXFooter, |
---|
1321 | gl2psPrintXXXBeginViewport and gl2psPrintXXXEndViewport) for the |
---|
1322 | new format. */ |
---|
1323 | |
---|
1324 | void gl2psWriteByte(FILE *stream, unsigned char byte){ |
---|
1325 | unsigned char h = byte / 16; |
---|
1326 | unsigned char l = byte % 16; |
---|
1327 | fprintf(stream, "%x%x", h, l); |
---|
1328 | } |
---|
1329 | |
---|
1330 | int gl2psGetRGB(GLfloat *pixels, GLsizei width, GLsizei height, GLuint x, GLuint y, |
---|
1331 | GLfloat *red, GLfloat *green, GLfloat *blue){ |
---|
1332 | /* OpenGL image is from down to up, PS image is up to down */ |
---|
1333 | GLfloat *pimag; |
---|
1334 | pimag = pixels + 3 * (width * (height - 1 - y) + x); |
---|
1335 | *red = *pimag; pimag++; |
---|
1336 | *green = *pimag; pimag++; |
---|
1337 | *blue = *pimag; pimag++; |
---|
1338 | return 1; |
---|
1339 | } |
---|
1340 | |
---|
1341 | void gl2psPrintPostScriptPixmap(GLfloat x, GLfloat y, GLsizei width, GLsizei height, |
---|
1342 | GLenum, GLenum, GLfloat *pixels, |
---|
1343 | FILE *stream){ |
---|
1344 | typedef unsigned char Uchar; |
---|
1345 | int status = 1, nbhex, nbyte; |
---|
1346 | int row, col, ibyte,icase; |
---|
1347 | float dr = 0, dg = 0, db = 0, fgrey = 0; |
---|
1348 | Uchar red, green, blue, b, grey; |
---|
1349 | /* Options */ |
---|
1350 | int shade = 0; |
---|
1351 | //int nbit = 2; |
---|
1352 | int nbit = 4; |
---|
1353 | //int nbit = 8; |
---|
1354 | |
---|
1355 | if((width <= 0) || (height <= 0)) return; |
---|
1356 | |
---|
1357 | /* Msg(INFO, "gl2psPrintPostScriptPixmap: x %g y %g w %d h %d", x, y, width, height); */ |
---|
1358 | |
---|
1359 | fprintf(stream, "gsave\n"); |
---|
1360 | fprintf(stream, "%.2f %.2f translate\n", x, y); |
---|
1361 | fprintf(stream, "%d %d scale\n", width, height); |
---|
1362 | |
---|
1363 | if(shade != 0){ /* grey */ |
---|
1364 | fprintf(stream, "/picstr %d string def\n", width); |
---|
1365 | fprintf(stream, "%d %d %d\n", width, height, 8); |
---|
1366 | fprintf(stream, "[ %d 0 0 -%d 0 %d ]\n", width, height, height); |
---|
1367 | fprintf(stream, "{ currentfile picstr readhexstring pop }\n"); |
---|
1368 | fprintf(stream, "image\n"); |
---|
1369 | for(row = 0; row < height; row++){ |
---|
1370 | for(col = 0; col < width; col++){ |
---|
1371 | status = gl2psGetRGB(pixels, width, height, |
---|
1372 | col, row, &dr, &dg, &db) == 0 ? 0 : status; |
---|
1373 | fgrey = (0.30 * dr + 0.59 * dg + 0.11 * db); |
---|
1374 | grey = (Uchar)(255. * fgrey); |
---|
1375 | gl2psWriteByte(stream, grey); |
---|
1376 | } |
---|
1377 | fprintf(stream, "\n"); |
---|
1378 | } |
---|
1379 | nbhex = width * height * 2; |
---|
1380 | fprintf(stream, "%%%% nbhex digit :%d\n", nbhex); |
---|
1381 | } |
---|
1382 | else if(nbit == 2){ |
---|
1383 | int nrgb = width * 3; |
---|
1384 | int nbits = nrgb * nbit; |
---|
1385 | nbyte = nbits/8; |
---|
1386 | if((nbyte*8)!=nbits) nbyte++; |
---|
1387 | /* 2 bit for r and g and b */ |
---|
1388 | /* rgbs following each other */ |
---|
1389 | fprintf(stream, "/rgbstr %d string def\n", nbyte); |
---|
1390 | fprintf(stream, "%d %d %d\n", width, height, nbit); |
---|
1391 | fprintf(stream, "[ %d 0 0 -%d 0 %d ]\n", width, height, height); |
---|
1392 | fprintf(stream, "{ currentfile rgbstr readhexstring pop }\n" ); |
---|
1393 | fprintf(stream, "false 3\n" ); |
---|
1394 | fprintf(stream, "colorimage\n" ); |
---|
1395 | for(row = 0; row < height; row++){ |
---|
1396 | icase = 1; |
---|
1397 | col = 0; |
---|
1398 | b = 0; |
---|
1399 | for(ibyte = 0; ibyte < nbyte; ibyte++){ |
---|
1400 | if(icase==1) { |
---|
1401 | if(col<width) { |
---|
1402 | status = gl2psGetRGB(pixels, width, height, |
---|
1403 | col, row, &dr, &dg, &db) == 0 ? 0 : status; |
---|
1404 | } else { |
---|
1405 | dr = dg = db = 0; |
---|
1406 | } |
---|
1407 | col++; |
---|
1408 | red = (Uchar)(3. * dr); |
---|
1409 | green = (Uchar)(3. * dg); |
---|
1410 | blue = (Uchar)(3. * db); |
---|
1411 | b = red; |
---|
1412 | b = (b<<2)+green; |
---|
1413 | b = (b<<2)+blue; |
---|
1414 | if(col<width) { |
---|
1415 | status = gl2psGetRGB(pixels, width, height, |
---|
1416 | col, row, &dr, &dg, &db) == 0 ? 0 : status; |
---|
1417 | } else { |
---|
1418 | dr = dg = db = 0; |
---|
1419 | } |
---|
1420 | col++; |
---|
1421 | red = (Uchar)(3. * dr); |
---|
1422 | green = (Uchar)(3. * dg); |
---|
1423 | blue = (Uchar)(3. * db); |
---|
1424 | b = (b<<2)+red; |
---|
1425 | gl2psWriteByte(stream, b); |
---|
1426 | b = 0; |
---|
1427 | icase++; |
---|
1428 | } else if(icase==2) { |
---|
1429 | b = green; |
---|
1430 | b = (b<<2)+blue; |
---|
1431 | if(col<width) { |
---|
1432 | status = gl2psGetRGB(pixels, width, height, |
---|
1433 | col, row, &dr, &dg, &db) == 0 ? 0 : status; |
---|
1434 | } else { |
---|
1435 | dr = dg = db = 0; |
---|
1436 | } |
---|
1437 | col++; |
---|
1438 | red = (Uchar)(3. * dr); |
---|
1439 | green = (Uchar)(3. * dg); |
---|
1440 | blue = (Uchar)(3. * db); |
---|
1441 | b = (b<<2)+red; |
---|
1442 | b = (b<<2)+green; |
---|
1443 | gl2psWriteByte(stream, b); |
---|
1444 | b = 0; |
---|
1445 | icase++; |
---|
1446 | } else if(icase==3) { |
---|
1447 | b = blue; |
---|
1448 | if(col<width) { |
---|
1449 | status = gl2psGetRGB(pixels,width,height, |
---|
1450 | col, row, &dr, &dg, &db) == 0 ? 0 : status; |
---|
1451 | } else { |
---|
1452 | dr = dg = db = 0; |
---|
1453 | } |
---|
1454 | col++; |
---|
1455 | red = (Uchar)(3. * dr); |
---|
1456 | green = (Uchar)(3. * dg); |
---|
1457 | blue = (Uchar)(3. * db); |
---|
1458 | b = (b<<2)+red; |
---|
1459 | b = (b<<2)+green; |
---|
1460 | b = (b<<2)+blue; |
---|
1461 | gl2psWriteByte(stream, b); |
---|
1462 | b = 0; |
---|
1463 | icase = 1; |
---|
1464 | } |
---|
1465 | } |
---|
1466 | fprintf(stream, "\n"); |
---|
1467 | } |
---|
1468 | } |
---|
1469 | else if(nbit == 4){ |
---|
1470 | int nrgb = width * 3; |
---|
1471 | int nbits = nrgb * nbit; |
---|
1472 | nbyte = nbits/8; |
---|
1473 | if((nbyte*8)!=nbits) nbyte++; |
---|
1474 | /* 4 bit for r and g and b */ |
---|
1475 | /* rgbs following each other */ |
---|
1476 | fprintf(stream, "/rgbstr %d string def\n", nbyte); |
---|
1477 | fprintf(stream, "%d %d %d\n", width, height,nbit); |
---|
1478 | fprintf(stream, "[ %d 0 0 -%d 0 %d ]\n", width, height, height); |
---|
1479 | fprintf(stream, "{ currentfile rgbstr readhexstring pop }\n"); |
---|
1480 | fprintf(stream, "false 3\n"); |
---|
1481 | fprintf(stream, "colorimage\n"); |
---|
1482 | for(row = 0; row < height; row++){ |
---|
1483 | col = 0; |
---|
1484 | icase = 1; |
---|
1485 | for(ibyte = 0; ibyte < nbyte; ibyte++){ |
---|
1486 | if(icase==1) { |
---|
1487 | if(col<width) { |
---|
1488 | status = gl2psGetRGB(pixels, width, height, |
---|
1489 | col, row, &dr, &dg, &db) == 0 ? 0 : status; |
---|
1490 | } else { |
---|
1491 | dr = dg = db = 0; |
---|
1492 | } |
---|
1493 | col++; |
---|
1494 | red = (Uchar)(15. * dr); |
---|
1495 | green = (Uchar)(15. * dg); |
---|
1496 | fprintf(stream, "%x%x", red, green); |
---|
1497 | icase++; |
---|
1498 | } else if(icase==2) { |
---|
1499 | blue = (Uchar)(15. * db); |
---|
1500 | if(col<width) { |
---|
1501 | status = gl2psGetRGB(pixels, width, height, |
---|
1502 | col, row, &dr, &dg, &db) == 0 ? 0 : status; |
---|
1503 | } else { |
---|
1504 | dr = dg = db = 0; |
---|
1505 | } |
---|
1506 | col++; |
---|
1507 | red = (Uchar)(15. * dr); |
---|
1508 | fprintf(stream,"%x%x",blue,red); |
---|
1509 | icase++; |
---|
1510 | } else if(icase==3) { |
---|
1511 | green = (Uchar)(15. * dg); |
---|
1512 | blue = (Uchar)(15. * db); |
---|
1513 | fprintf(stream, "%x%x", green, blue); |
---|
1514 | icase = 1; |
---|
1515 | } |
---|
1516 | } |
---|
1517 | fprintf(stream, "\n"); |
---|
1518 | } |
---|
1519 | } |
---|
1520 | else{ |
---|
1521 | nbyte = width * 3; |
---|
1522 | /* 8 bit for r and g and b */ |
---|
1523 | fprintf(stream, "/rgbstr %d string def\n", nbyte); |
---|
1524 | fprintf(stream, "%d %d %d\n", width, height, 8); |
---|
1525 | fprintf(stream, "[ %d 0 0 -%d 0 %d ]\n", width, height, height); |
---|
1526 | fprintf(stream, "{ currentfile rgbstr readhexstring pop }\n"); |
---|
1527 | fprintf(stream, "false 3\n"); |
---|
1528 | fprintf(stream, "colorimage\n"); |
---|
1529 | for(row = 0; row < height; row++){ |
---|
1530 | for(col = 0; col < width; col++){ |
---|
1531 | status = gl2psGetRGB(pixels, width, height, |
---|
1532 | col, row, &dr, &dg, &db) == 0 ? 0 : status; |
---|
1533 | red = (Uchar)(255. * dr); |
---|
1534 | gl2psWriteByte(stream, red); |
---|
1535 | green = (Uchar)(255. * dg); |
---|
1536 | gl2psWriteByte(stream, green); |
---|
1537 | blue = (Uchar)(255. * db); |
---|
1538 | gl2psWriteByte(stream, blue); |
---|
1539 | } |
---|
1540 | fprintf(stream, "\n"); |
---|
1541 | } |
---|
1542 | } |
---|
1543 | |
---|
1544 | if(status == 0){ |
---|
1545 | gl2psMsg(GL2PS_ERROR, "Problem to retreive some pixel rgb"); |
---|
1546 | } |
---|
1547 | fprintf(stream, "grestore\n"); |
---|
1548 | } |
---|
1549 | |
---|
1550 | void gl2psPrintPostScriptHeader(void){ |
---|
1551 | GLint index; |
---|
1552 | GLfloat rgba[4]; |
---|
1553 | time_t now; |
---|
1554 | |
---|
1555 | time(&now); |
---|
1556 | |
---|
1557 | if(gl2ps->format == GL2PS_PS){ |
---|
1558 | fprintf(gl2ps->stream, "%%!PS-Adobe-3.0\n"); |
---|
1559 | } |
---|
1560 | else{ |
---|
1561 | fprintf(gl2ps->stream, "%%!PS-Adobe-3.0 EPSF-3.0\n"); |
---|
1562 | } |
---|
1563 | |
---|
1564 | fprintf(gl2ps->stream, |
---|
1565 | "%%%%Title: %s\n" |
---|
1566 | "%%%%Creator: GL2PS, an OpenGL to PostScript Printing Library, v. %g\n" |
---|
1567 | "%%%%For: %s\n" |
---|
1568 | "%%%%CreationDate: %s" |
---|
1569 | "%%%%LanguageLevel: 3\n" |
---|
1570 | "%%%%DocumentData: Clean7Bit\n" |
---|
1571 | "%%%%Pages: 1\n", |
---|
1572 | gl2ps->title, GL2PS_VERSION, gl2ps->producer, ctime(&now)); |
---|
1573 | |
---|
1574 | if(gl2ps->format == GL2PS_PS){ |
---|
1575 | fprintf(gl2ps->stream, |
---|
1576 | "%%%%Orientation: %s\n" |
---|
1577 | "%%%%DocumentMedia: Default %d %d 0 () ()\n", |
---|
1578 | (gl2ps->options & GL2PS_LANDSCAPE) ? "Landscape" : "Portrait", |
---|
1579 | (gl2ps->options & GL2PS_LANDSCAPE) ? gl2ps->viewport[3] : gl2ps->viewport[2], |
---|
1580 | (gl2ps->options & GL2PS_LANDSCAPE) ? gl2ps->viewport[2] : gl2ps->viewport[3]); |
---|
1581 | } |
---|
1582 | |
---|
1583 | fprintf(gl2ps->stream, |
---|
1584 | "%%%%BoundingBox: %d %d %d %d\n" |
---|
1585 | "%%%%Copyright: GNU LGPL (C) 1999-2003 Christophe Geuzaine <geuz@geuz.org>\n" |
---|
1586 | "%%%%EndComments\n", |
---|
1587 | (gl2ps->options & GL2PS_LANDSCAPE) ? gl2ps->viewport[1] : gl2ps->viewport[0], |
---|
1588 | (gl2ps->options & GL2PS_LANDSCAPE) ? gl2ps->viewport[0] : gl2ps->viewport[1], |
---|
1589 | (gl2ps->options & GL2PS_LANDSCAPE) ? gl2ps->viewport[3] : gl2ps->viewport[2], |
---|
1590 | (gl2ps->options & GL2PS_LANDSCAPE) ? gl2ps->viewport[2] : gl2ps->viewport[3]); |
---|
1591 | |
---|
1592 | /* RGB color: r g b C (replace C by G in output to change from rgb to gray) |
---|
1593 | Grayscale: r g b G |
---|
1594 | Font choose: size fontname FC |
---|
1595 | String primitive: (string) x y size fontname S |
---|
1596 | Point primitive: x y size P |
---|
1597 | Line width: width W |
---|
1598 | Flat-shaded line: x2 y2 x1 y1 L |
---|
1599 | Smooth-shaded line: x2 y2 r2 g2 b2 x1 y1 r1 g1 b1 SL |
---|
1600 | Flat-shaded triangle: x3 y3 x2 y2 x1 y1 T |
---|
1601 | Smooth-shaded triangle: x3 y3 r3 g3 b3 x2 y2 r2 g2 b2 x1 y1 r1 g1 b1 ST */ |
---|
1602 | |
---|
1603 | fprintf(gl2ps->stream, |
---|
1604 | "%%%%BeginProlog\n" |
---|
1605 | "/gl2psdict 64 dict def gl2psdict begin\n" |
---|
1606 | "1 setlinecap 1 setlinejoin\n" |
---|
1607 | "/tryPS3shading %s def %% set to false to force subdivision\n" |
---|
1608 | "/rThreshold %g def %% red component subdivision threshold\n" |
---|
1609 | "/gThreshold %g def %% green component subdivision threshold\n" |
---|
1610 | "/bThreshold %g def %% blue component subdivision threshold\n" |
---|
1611 | "/BD { bind def } bind def\n" |
---|
1612 | "/C { setrgbcolor } BD\n" |
---|
1613 | "/G { 0.082 mul exch 0.6094 mul add exch 0.3086 mul add neg 1.0 add setgray } BD\n" |
---|
1614 | "/W { setlinewidth } BD\n" |
---|
1615 | "/FC { findfont exch scalefont setfont } BD\n" |
---|
1616 | "/S { FC moveto show } BD\n" |
---|
1617 | "/P { newpath 0.0 360.0 arc closepath fill } BD\n" |
---|
1618 | "/L { newpath moveto lineto stroke } BD\n" |
---|
1619 | "/SL { C moveto C lineto stroke } BD\n" |
---|
1620 | "/T { newpath moveto lineto lineto closepath fill } BD\n", |
---|
1621 | (gl2ps->options & GL2PS_NO_PS3_SHADING) ? "false" : "true", |
---|
1622 | gl2ps->threshold[0], gl2ps->threshold[1], gl2ps->threshold[2]); |
---|
1623 | |
---|
1624 | /* Smooth-shaded triangle with PostScript level 3 shfill operator: |
---|
1625 | x3 y3 r3 g3 b3 x2 y2 r2 g2 b2 x1 y1 r1 g1 b1 STshfill */ |
---|
1626 | |
---|
1627 | fprintf(gl2ps->stream, |
---|
1628 | "/STshfill {\n" |
---|
1629 | " /b1 exch def /g1 exch def /r1 exch def /y1 exch def /x1 exch def\n" |
---|
1630 | " /b2 exch def /g2 exch def /r2 exch def /y2 exch def /x2 exch def\n" |
---|
1631 | " /b3 exch def /g3 exch def /r3 exch def /y3 exch def /x3 exch def\n" |
---|
1632 | " gsave << /ShadingType 4 /ColorSpace [/DeviceRGB]\n" |
---|
1633 | " /DataSource [ 0 x1 y1 r1 g1 b1 0 x2 y2 r2 g2 b2 0 x3 y3 r3 g3 b3 ] >>\n" |
---|
1634 | " shfill grestore } BD\n"); |
---|
1635 | |
---|
1636 | /* Flat-shaded triangle with middle color: |
---|
1637 | x3 y3 r3 g3 b3 x2 y2 r2 g2 b2 x1 y1 r1 g1 b1 Tm */ |
---|
1638 | |
---|
1639 | fprintf(gl2ps->stream, |
---|
1640 | /* stack : x3 y3 r3 g3 b3 x2 y2 r2 g2 b2 x1 y1 r1 g1 b1 */ |
---|
1641 | "/Tm { 3 -1 roll 8 -1 roll 13 -1 roll add add 3 div\n" /* r = (r1+r2+r3)/3 */ |
---|
1642 | /* stack : x3 y3 g3 b3 x2 y2 g2 b2 x1 y1 g1 b1 r */ |
---|
1643 | " 3 -1 roll 7 -1 roll 11 -1 roll add add 3 div\n" /* g = (g1+g2+g3)/3 */ |
---|
1644 | /* stack : x3 y3 b3 x2 y2 b2 x1 y1 b1 r g b */ |
---|
1645 | " 3 -1 roll 6 -1 roll 9 -1 roll add add 3 div" /* b = (b1+b2+b3)/3 */ |
---|
1646 | /* stack : x3 y3 x2 y2 x1 y1 r g b */ |
---|
1647 | " C T } BD\n"); |
---|
1648 | |
---|
1649 | /* Split triangle in four sub-triangles (at sides middle points) and call the |
---|
1650 | STnoshfill procedure on each, interpolating the colors in RGB space: |
---|
1651 | x3 y3 r3 g3 b3 x2 y2 r2 g2 b2 x1 y1 r1 g1 b1 STsplit |
---|
1652 | (in procedure comments key: (Vi) = xi yi ri gi bi) */ |
---|
1653 | |
---|
1654 | fprintf(gl2ps->stream, |
---|
1655 | "/STsplit {\n" |
---|
1656 | " 4 index 15 index add 0.5 mul\n" /* x13 = (x1+x3)/2 */ |
---|
1657 | " 4 index 15 index add 0.5 mul\n" /* y13 = (y1+y3)/2 */ |
---|
1658 | " 4 index 15 index add 0.5 mul\n" /* r13 = (r1+r3)/2 */ |
---|
1659 | " 4 index 15 index add 0.5 mul\n" /* g13 = (g1+g3)/2 */ |
---|
1660 | " 4 index 15 index add 0.5 mul\n" /* b13 = (b1+b3)/2 */ |
---|
1661 | " 5 copy 5 copy 25 15 roll\n" |
---|
1662 | /* stack : (V3) (V13) (V13) (V13) (V2) (V1) */ |
---|
1663 | " 9 index 30 index add 0.5 mul\n" /* x23 = (x2+x3)/2 */ |
---|
1664 | " 9 index 30 index add 0.5 mul\n" /* y23 = (y2+y3)/2 */ |
---|
1665 | " 9 index 30 index add 0.5 mul\n" /* r23 = (r2+r3)/2 */ |
---|
1666 | " 9 index 30 index add 0.5 mul\n" /* g23 = (g2+g3)/2 */ |
---|
1667 | " 9 index 30 index add 0.5 mul\n" /* b23 = (b2+b3)/2 */ |
---|
1668 | " 5 copy 5 copy 35 5 roll 25 5 roll 15 5 roll\n" |
---|
1669 | /* stack : (V3) (V13) (V23) (V13) (V23) (V13) (V23) (V2) (V1) */ |
---|
1670 | " 4 index 10 index add 0.5 mul\n" /* x12 = (x1+x2)/2 */ |
---|
1671 | " 4 index 10 index add 0.5 mul\n" /* y12 = (y1+y2)/2 */ |
---|
1672 | " 4 index 10 index add 0.5 mul\n" /* r12 = (r1+r2)/2 */ |
---|
1673 | " 4 index 10 index add 0.5 mul\n" /* g12 = (g1+g2)/2 */ |
---|
1674 | " 4 index 10 index add 0.5 mul\n" /* b12 = (b1+b2)/2 */ |
---|
1675 | " 5 copy 5 copy 40 5 roll 25 5 roll 15 5 roll 25 5 roll\n" |
---|
1676 | /* stack : (V3) (V13) (V23) (V13) (V12) (V23) (V13) (V1) (V12) (V23) (V12) (V2) */ |
---|
1677 | " STnoshfill STnoshfill STnoshfill STnoshfill } BD\n"); |
---|
1678 | |
---|
1679 | /* Gouraud shaded triangle using recursive subdivision until the difference |
---|
1680 | between corner colors does not exceed the thresholds: |
---|
1681 | x3 y3 r3 g3 b3 x2 y2 r2 g2 b2 x1 y1 r1 g1 b1 STnoshfill */ |
---|
1682 | |
---|
1683 | fprintf(gl2ps->stream, |
---|
1684 | "/STnoshfill {\n" |
---|
1685 | " 2 index 8 index sub abs rThreshold gt\n" /* |r1-r2|>rth */ |
---|
1686 | " { STsplit }\n" |
---|
1687 | " { 1 index 7 index sub abs gThreshold gt\n" /* |g1-g2|>gth */ |
---|
1688 | " { STsplit }\n" |
---|
1689 | " { dup 6 index sub abs bThreshold gt\n" /* |b1-b2|>bth */ |
---|
1690 | " { STsplit }\n" |
---|
1691 | " { 2 index 13 index sub abs rThreshold gt\n" /* |r1-r3|>rht */ |
---|
1692 | " { STsplit }\n" |
---|
1693 | " { 1 index 12 index sub abs gThreshold gt\n" /* |g1-g3|>gth */ |
---|
1694 | " { STsplit }\n" |
---|
1695 | " { dup 11 index sub abs bThreshold gt\n" /* |b1-b3|>bth */ |
---|
1696 | " { STsplit }\n" |
---|
1697 | " { 7 index 13 index sub abs rThreshold gt\n" /* |r2-r3|>rht */ |
---|
1698 | " { STsplit }\n" |
---|
1699 | " { 6 index 12 index sub abs gThreshold gt\n" /* |g2-g3|>gth */ |
---|
1700 | " { STsplit }\n" |
---|
1701 | " { 5 index 11 index sub abs bThreshold gt\n" /* |b2-b3|>bth */ |
---|
1702 | " { STsplit }\n" |
---|
1703 | " { Tm }\n" /* all colors sufficiently similar */ |
---|
1704 | " ifelse }\n" |
---|
1705 | " ifelse }\n" |
---|
1706 | " ifelse }\n" |
---|
1707 | " ifelse }\n" |
---|
1708 | " ifelse }\n" |
---|
1709 | " ifelse }\n" |
---|
1710 | " ifelse }\n" |
---|
1711 | " ifelse }\n" |
---|
1712 | " ifelse } BD\n"); |
---|
1713 | |
---|
1714 | fprintf(gl2ps->stream, |
---|
1715 | "tryPS3shading\n" |
---|
1716 | "{ /shfill where\n" |
---|
1717 | " { /ST { STshfill } BD }\n" |
---|
1718 | " { /ST { STnoshfill } BD }\n" |
---|
1719 | " ifelse }\n" |
---|
1720 | "{ /ST { STnoshfill } BD }\n" |
---|
1721 | "ifelse\n"); |
---|
1722 | |
---|
1723 | fprintf(gl2ps->stream, |
---|
1724 | "end\n" |
---|
1725 | "%%%%EndProlog\n" |
---|
1726 | "%%%%BeginSetup\n" |
---|
1727 | "/DeviceRGB setcolorspace\n" |
---|
1728 | "gl2psdict begin\n" |
---|
1729 | "%%%%EndSetup\n" |
---|
1730 | "%%%%Page: 1 1\n" |
---|
1731 | "%%%%BeginPageSetup\n"); |
---|
1732 | |
---|
1733 | if(gl2ps->options & GL2PS_LANDSCAPE){ |
---|
1734 | fprintf(gl2ps->stream, |
---|
1735 | "%d 0 translate 90 rotate\n", |
---|
1736 | gl2ps->viewport[3]); |
---|
1737 | } |
---|
1738 | |
---|
1739 | fprintf(gl2ps->stream, |
---|
1740 | "%%%%EndPageSetup\n" |
---|
1741 | "mark\n" |
---|
1742 | "gsave\n" |
---|
1743 | "1.0 1.0 scale\n"); |
---|
1744 | |
---|
1745 | if(gl2ps->options & GL2PS_DRAW_BACKGROUND){ |
---|
1746 | if(gl2ps->colormode == GL_RGBA || gl2ps->colorsize == 0){ |
---|
1747 | glGetFloatv(GL_COLOR_CLEAR_VALUE, rgba); |
---|
1748 | } |
---|
1749 | else{ |
---|
1750 | glGetIntegerv(GL_INDEX_CLEAR_VALUE, &index); |
---|
1751 | rgba[0] = gl2ps->colormap[index][0]; |
---|
1752 | rgba[1] = gl2ps->colormap[index][1]; |
---|
1753 | rgba[2] = gl2ps->colormap[index][2]; |
---|
1754 | rgba[3] = 0.; |
---|
1755 | } |
---|
1756 | fprintf(gl2ps->stream, |
---|
1757 | "%g %g %g C\n" |
---|
1758 | "newpath %d %d moveto %d %d lineto %d %d lineto %d %d lineto\n" |
---|
1759 | "closepath fill\n", |
---|
1760 | rgba[0], rgba[1], rgba[2], |
---|
1761 | gl2ps->viewport[0], gl2ps->viewport[1], gl2ps->viewport[2], |
---|
1762 | gl2ps->viewport[1], gl2ps->viewport[2], gl2ps->viewport[3], |
---|
1763 | gl2ps->viewport[0], gl2ps->viewport[3]); |
---|
1764 | } |
---|
1765 | } |
---|
1766 | |
---|
1767 | void gl2psPrintPostScriptColor(GL2PSrgba rgba){ |
---|
1768 | if(!gl2psSameColor(gl2ps->lastrgba, rgba)){ |
---|
1769 | gl2ps->lastrgba[0] = rgba[0]; |
---|
1770 | gl2ps->lastrgba[1] = rgba[1]; |
---|
1771 | gl2ps->lastrgba[2] = rgba[2]; |
---|
1772 | fprintf(gl2ps->stream, "%g %g %g C\n", rgba[0], rgba[1], rgba[2]); |
---|
1773 | } |
---|
1774 | } |
---|
1775 | |
---|
1776 | void gl2psResetPostScriptColor(void){ |
---|
1777 | gl2ps->lastrgba[0] = gl2ps->lastrgba[1] = gl2ps->lastrgba[2] = -1.; |
---|
1778 | } |
---|
1779 | |
---|
1780 | void gl2psPrintPostScriptPrimitive(void *a, void *){ |
---|
1781 | GL2PSprimitive *prim; |
---|
1782 | |
---|
1783 | prim = *(GL2PSprimitive**)a; |
---|
1784 | |
---|
1785 | if(gl2ps->options & GL2PS_OCCLUSION_CULL && prim->culled) return; |
---|
1786 | |
---|
1787 | switch(prim->type){ |
---|
1788 | case GL2PS_PIXMAP : |
---|
1789 | gl2psPrintPostScriptPixmap(prim->verts[0].xyz[0], prim->verts[0].xyz[1], |
---|
1790 | prim->image->width, prim->image->height, |
---|
1791 | prim->image->format, prim->image->type, |
---|
1792 | prim->image->pixels, gl2ps->stream); |
---|
1793 | break; |
---|
1794 | case GL2PS_TEXT : |
---|
1795 | gl2psPrintPostScriptColor(prim->verts[0].rgba); |
---|
1796 | fprintf(gl2ps->stream, "(%s) %g %g %d /%s S\n", |
---|
1797 | prim->text->str, prim->verts[0].xyz[0], prim->verts[0].xyz[1], |
---|
1798 | prim->text->fontsize, prim->text->fontname); |
---|
1799 | break; |
---|
1800 | case GL2PS_POINT : |
---|
1801 | gl2psPrintPostScriptColor(prim->verts[0].rgba); |
---|
1802 | fprintf(gl2ps->stream, "%g %g %g P\n", |
---|
1803 | prim->verts[0].xyz[0], prim->verts[0].xyz[1], 0.5*prim->width); |
---|
1804 | break; |
---|
1805 | case GL2PS_LINE : |
---|
1806 | if(gl2ps->lastlinewidth != prim->width){ |
---|
1807 | gl2ps->lastlinewidth = prim->width; |
---|
1808 | fprintf(gl2ps->stream, "%g W\n", gl2ps->lastlinewidth); |
---|
1809 | } |
---|
1810 | if(prim->dash){ |
---|
1811 | fprintf(gl2ps->stream, "[%d] 0 setdash\n", prim->dash); |
---|
1812 | } |
---|
1813 | if(gl2ps->shade && !gl2psVertsSameColor(prim)){ |
---|
1814 | gl2psResetPostScriptColor(); |
---|
1815 | fprintf(gl2ps->stream, "%g %g %g %g %g %g %g %g %g %g SL\n", |
---|
1816 | prim->verts[1].xyz[0], prim->verts[1].xyz[1], |
---|
1817 | prim->verts[1].rgba[0], prim->verts[1].rgba[1], |
---|
1818 | prim->verts[1].rgba[2], prim->verts[0].xyz[0], |
---|
1819 | prim->verts[0].xyz[1], prim->verts[0].rgba[0], |
---|
1820 | prim->verts[0].rgba[1], prim->verts[0].rgba[2]); |
---|
1821 | } |
---|
1822 | else{ |
---|
1823 | gl2psPrintPostScriptColor(prim->verts[0].rgba); |
---|
1824 | fprintf(gl2ps->stream, "%g %g %g %g L\n", |
---|
1825 | prim->verts[1].xyz[0], prim->verts[1].xyz[1], |
---|
1826 | prim->verts[0].xyz[0], prim->verts[0].xyz[1]); |
---|
1827 | } |
---|
1828 | if(prim->dash){ |
---|
1829 | fprintf(gl2ps->stream, "[] 0 setdash\n"); |
---|
1830 | } |
---|
1831 | break; |
---|
1832 | case GL2PS_TRIANGLE : |
---|
1833 | if(gl2ps->shade && !gl2psVertsSameColor(prim)){ |
---|
1834 | gl2psResetPostScriptColor(); |
---|
1835 | fprintf(gl2ps->stream, "%g %g %g %g %g %g %g %g %g %g %g %g %g %g %g ST\n", |
---|
1836 | prim->verts[2].xyz[0], prim->verts[2].xyz[1], |
---|
1837 | prim->verts[2].rgba[0], prim->verts[2].rgba[1], |
---|
1838 | prim->verts[2].rgba[2], prim->verts[1].xyz[0], |
---|
1839 | prim->verts[1].xyz[1], prim->verts[1].rgba[0], |
---|
1840 | prim->verts[1].rgba[1], prim->verts[1].rgba[2], |
---|
1841 | prim->verts[0].xyz[0], prim->verts[0].xyz[1], |
---|
1842 | prim->verts[0].rgba[0], prim->verts[0].rgba[1], |
---|
1843 | prim->verts[0].rgba[2]); |
---|
1844 | } |
---|
1845 | else{ |
---|
1846 | gl2psPrintPostScriptColor(prim->verts[0].rgba); |
---|
1847 | fprintf(gl2ps->stream, "%g %g %g %g %g %g T\n", |
---|
1848 | prim->verts[2].xyz[0], prim->verts[2].xyz[1], |
---|
1849 | prim->verts[1].xyz[0], prim->verts[1].xyz[1], |
---|
1850 | prim->verts[0].xyz[0], prim->verts[0].xyz[1]); |
---|
1851 | } |
---|
1852 | break; |
---|
1853 | case GL2PS_QUADRANGLE : |
---|
1854 | gl2psMsg(GL2PS_WARNING, "There should not be any quad left to print"); |
---|
1855 | break; |
---|
1856 | default : |
---|
1857 | gl2psMsg(GL2PS_ERROR, "Unknown type of primitive to print"); |
---|
1858 | break; |
---|
1859 | } |
---|
1860 | } |
---|
1861 | |
---|
1862 | void gl2psPrintPostScriptFooter(void){ |
---|
1863 | fprintf(gl2ps->stream, |
---|
1864 | "grestore\n" |
---|
1865 | "showpage\n" |
---|
1866 | "cleartomark\n" |
---|
1867 | "%%%%PageTrailer\n" |
---|
1868 | "%%%%Trailer\n" |
---|
1869 | "end\n" |
---|
1870 | "%%%%EOF\n"); |
---|
1871 | } |
---|
1872 | |
---|
1873 | void gl2psPrintPostScriptBeginViewport(GLint viewport[4]){ |
---|
1874 | GLint index; |
---|
1875 | GLfloat rgba[4]; |
---|
1876 | int x = viewport[0], y = viewport[1], w = viewport[2], h = viewport[3]; |
---|
1877 | |
---|
1878 | glRenderMode(GL_FEEDBACK); |
---|
1879 | |
---|
1880 | fprintf(gl2ps->stream, |
---|
1881 | "gsave\n" |
---|
1882 | "1.0 1.0 scale\n"); |
---|
1883 | |
---|
1884 | if(gl2ps->options & GL2PS_DRAW_BACKGROUND){ |
---|
1885 | if(gl2ps->colormode == GL_RGBA || gl2ps->colorsize == 0){ |
---|
1886 | glGetFloatv(GL_COLOR_CLEAR_VALUE, rgba); |
---|
1887 | } |
---|
1888 | else{ |
---|
1889 | glGetIntegerv(GL_INDEX_CLEAR_VALUE, &index); |
---|
1890 | rgba[0] = gl2ps->colormap[index][0]; |
---|
1891 | rgba[1] = gl2ps->colormap[index][1]; |
---|
1892 | rgba[2] = gl2ps->colormap[index][2]; |
---|
1893 | rgba[3] = 0.; |
---|
1894 | } |
---|
1895 | fprintf(gl2ps->stream, |
---|
1896 | "%g %g %g C\n" |
---|
1897 | "newpath %d %d moveto %d %d lineto %d %d lineto %d %d lineto\n" |
---|
1898 | "closepath fill\n", |
---|
1899 | rgba[0], rgba[1], rgba[2], |
---|
1900 | x, y, x+w, y, x+w, y+h, x, y+h); |
---|
1901 | fprintf(gl2ps->stream, |
---|
1902 | "newpath %d %d moveto %d %d lineto %d %d lineto %d %d lineto\n" |
---|
1903 | "closepath clip\n", |
---|
1904 | x, y, x+w, y, x+w, y+h, x, y+h); |
---|
1905 | } |
---|
1906 | |
---|
1907 | } |
---|
1908 | |
---|
1909 | GLint gl2psPrintPostScriptEndViewport(void){ |
---|
1910 | GLint res; |
---|
1911 | |
---|
1912 | res = gl2psPrintPrimitives(); |
---|
1913 | fprintf(gl2ps->stream, "grestore\n"); |
---|
1914 | return res; |
---|
1915 | } |
---|
1916 | |
---|
1917 | /* The LaTeX routines */ |
---|
1918 | |
---|
1919 | void gl2psPrintTeXHeader(void){ |
---|
1920 | char name[256]; |
---|
1921 | int i; |
---|
1922 | |
---|
1923 | if(gl2ps->filename && strlen(gl2ps->filename) < 256){ |
---|
1924 | for(i = strlen(gl2ps->filename)-1; i >= 0; i--){ |
---|
1925 | if(gl2ps->filename[i] == '.'){ |
---|
1926 | strncpy(name, gl2ps->filename, i); |
---|
1927 | name[i] = '\0'; |
---|
1928 | break; |
---|
1929 | } |
---|
1930 | } |
---|
1931 | if(i <= 0) strcpy(name, gl2ps->filename); |
---|
1932 | } |
---|
1933 | else{ |
---|
1934 | strcpy(name, "untitled"); |
---|
1935 | } |
---|
1936 | |
---|
1937 | fprintf(gl2ps->stream, |
---|
1938 | "\\setlength{\\unitlength}{1pt}\n" |
---|
1939 | "\\begin{picture}(0,0)\n" |
---|
1940 | "\\includegraphics{%s}\n" |
---|
1941 | "\\end{picture}%%\n" |
---|
1942 | "%s\\begin{picture}(%d,%d)(0,0)\n", |
---|
1943 | name, (gl2ps->options & GL2PS_LANDSCAPE) ? "\\rotatebox{90}{" : "", |
---|
1944 | gl2ps->viewport[2], gl2ps->viewport[3]); |
---|
1945 | } |
---|
1946 | |
---|
1947 | void gl2psPrintTeXPrimitive(void *a, void *){ |
---|
1948 | GL2PSprimitive *prim; |
---|
1949 | |
---|
1950 | prim = *(GL2PSprimitive**)a; |
---|
1951 | |
---|
1952 | switch(prim->type){ |
---|
1953 | case GL2PS_TEXT : |
---|
1954 | fprintf(gl2ps->stream, "\\put(%g,%g){\\makebox(0,0)[lb]{%s}}\n", |
---|
1955 | prim->verts[0].xyz[0], prim->verts[0].xyz[1], prim->text->str); |
---|
1956 | break; |
---|
1957 | default : |
---|
1958 | break; |
---|
1959 | } |
---|
1960 | } |
---|
1961 | |
---|
1962 | void gl2psPrintTeXFooter(void){ |
---|
1963 | fprintf(gl2ps->stream, "\\end{picture}%s\n", |
---|
1964 | (gl2ps->options & GL2PS_LANDSCAPE) ? "}" : ""); |
---|
1965 | } |
---|
1966 | |
---|
1967 | void gl2psPrintTeXBeginViewport(GLint){ |
---|
1968 | } |
---|
1969 | |
---|
1970 | GLint gl2psPrintTeXEndViewport(void){ |
---|
1971 | return GL2PS_SUCCESS; |
---|
1972 | } |
---|
1973 | |
---|
1974 | /* The general primitive printing routine */ |
---|
1975 | |
---|
1976 | GLint gl2psPrintPrimitives(void){ |
---|
1977 | GL2PSbsptree *root; |
---|
1978 | GL2PSxyz eye = {0., 0., 100000.}; |
---|
1979 | GLint shademodel, res; |
---|
1980 | void (*pprim)(void *a, void *b) = 0; |
---|
1981 | |
---|
1982 | glGetIntegerv(GL_SHADE_MODEL, &shademodel); |
---|
1983 | gl2ps->shade = (shademodel == GL_SMOOTH); |
---|
1984 | |
---|
1985 | if(gl2ps->format == GL2PS_TEX){ |
---|
1986 | res = GL2PS_SUCCESS; |
---|
1987 | } |
---|
1988 | else{ |
---|
1989 | res = gl2psParseFeedbackBuffer(); |
---|
1990 | } |
---|
1991 | |
---|
1992 | if(res == GL2PS_SUCCESS){ |
---|
1993 | |
---|
1994 | switch(gl2ps->format){ |
---|
1995 | case GL2PS_TEX : |
---|
1996 | pprim = gl2psPrintTeXPrimitive; |
---|
1997 | break; |
---|
1998 | case GL2PS_PS : |
---|
1999 | case GL2PS_EPS : |
---|
2000 | pprim = gl2psPrintPostScriptPrimitive; |
---|
2001 | break; |
---|
2002 | } |
---|
2003 | |
---|
2004 | switch(gl2ps->sort){ |
---|
2005 | case GL2PS_NO_SORT : |
---|
2006 | gl2psListAction(gl2ps->primitives, pprim); |
---|
2007 | gl2psListAction(gl2ps->primitives, gl2psFreePrimitive); |
---|
2008 | /* reset the primitive list, waiting for the next viewport */ |
---|
2009 | gl2psListReset(gl2ps->primitives); |
---|
2010 | break; |
---|
2011 | case GL2PS_SIMPLE_SORT : |
---|
2012 | gl2psListSort(gl2ps->primitives, gl2psCompareDepth); |
---|
2013 | if(gl2ps->options & GL2PS_OCCLUSION_CULL){ |
---|
2014 | gl2psListAction(gl2ps->primitives, gl2psAddInImageTree); |
---|
2015 | gl2psFreeBspImageTree(&gl2ps->imagetree); |
---|
2016 | } |
---|
2017 | gl2psListActionInverse(gl2ps->primitives, pprim); |
---|
2018 | gl2psListAction(gl2ps->primitives, gl2psFreePrimitive); |
---|
2019 | /* reset the primitive list, waiting for the next viewport */ |
---|
2020 | gl2psListReset(gl2ps->primitives); |
---|
2021 | break; |
---|
2022 | case GL2PS_BSP_SORT : |
---|
2023 | root = (GL2PSbsptree*)gl2psMalloc(sizeof(GL2PSbsptree)); |
---|
2024 | gl2psBuildBspTree(root, gl2ps->primitives); |
---|
2025 | if(gl2ps->boundary) gl2psBuildPolygonBoundary(root); |
---|
2026 | if(gl2ps->options & GL2PS_OCCLUSION_CULL){ |
---|
2027 | gl2psTraverseBspTree(root, eye, -(float)GL2PS_EPSILON, gl2psLess, |
---|
2028 | gl2psAddInImageTree); |
---|
2029 | gl2psFreeBspImageTree(&gl2ps->imagetree); |
---|
2030 | } |
---|
2031 | gl2psTraverseBspTree(root, eye, (float)GL2PS_EPSILON, gl2psGreater, |
---|
2032 | pprim); |
---|
2033 | gl2psFreeBspTree(&root); |
---|
2034 | /* reallocate the primitive list (it's been deleted by |
---|
2035 | gl2psBuildBspTree) in case there is another viewport */ |
---|
2036 | gl2ps->primitives = gl2psListCreate(500, 500, sizeof(GL2PSprimitive*)); |
---|
2037 | break; |
---|
2038 | default : |
---|
2039 | gl2psMsg(GL2PS_ERROR, "Unknown sorting algorithm: %d", gl2ps->sort); |
---|
2040 | res = GL2PS_ERROR; |
---|
2041 | break; |
---|
2042 | } |
---|
2043 | fflush(gl2ps->stream); |
---|
2044 | |
---|
2045 | } |
---|
2046 | |
---|
2047 | return res; |
---|
2048 | } |
---|
2049 | |
---|
2050 | /* The public routines */ |
---|
2051 | |
---|
2052 | GL2PSDLL_API GLint gl2psBeginPage(const char *title, const char *producer, |
---|
2053 | GLint viewport[4], GLint format, GLint sort, |
---|
2054 | GLint options, GLint colormode, |
---|
2055 | GLint colorsize, GL2PSrgba *colormap, |
---|
2056 | GLint nr, GLint ng, GLint nb, GLint buffersize, |
---|
2057 | FILE *stream, const char *filename){ |
---|
2058 | int i; |
---|
2059 | |
---|
2060 | gl2ps = (GL2PScontext*)gl2psMalloc(sizeof(GL2PScontext)); |
---|
2061 | gl2ps->maxbestroot = 10; |
---|
2062 | gl2ps->format = format; |
---|
2063 | gl2ps->title = title; |
---|
2064 | gl2ps->producer = producer; |
---|
2065 | gl2ps->filename = filename; |
---|
2066 | gl2ps->sort = sort; |
---|
2067 | gl2ps->options = options; |
---|
2068 | for(i = 0; i < 4; i++){ |
---|
2069 | gl2ps->viewport[i] = viewport[i]; |
---|
2070 | } |
---|
2071 | gl2ps->threshold[0] = nr ? 1./(GLfloat)nr : 0.032; |
---|
2072 | gl2ps->threshold[1] = ng ? 1./(GLfloat)ng : 0.017; |
---|
2073 | gl2ps->threshold[2] = nb ? 1./(GLfloat)nb : 0.05; |
---|
2074 | gl2ps->colormode = colormode; |
---|
2075 | gl2ps->buffersize = buffersize > 0 ? buffersize : 2048 * 2048; |
---|
2076 | for(i = 0; i < 4; i++){ |
---|
2077 | gl2ps->lastrgba[i] = -1.; |
---|
2078 | } |
---|
2079 | gl2ps->lastlinewidth = -1.; |
---|
2080 | gl2ps->imagetree = NULL; |
---|
2081 | |
---|
2082 | if(gl2ps->colormode == GL_RGBA){ |
---|
2083 | gl2ps->colorsize = 0; |
---|
2084 | gl2ps->colormap = NULL; |
---|
2085 | } |
---|
2086 | else if(gl2ps->colormode == GL_COLOR_INDEX){ |
---|
2087 | if(!colorsize || !colormap){ |
---|
2088 | gl2psMsg(GL2PS_ERROR, "Missing colormap for GL_COLOR_INDEX rendering"); |
---|
2089 | gl2psFree(gl2ps); |
---|
2090 | gl2ps = NULL; |
---|
2091 | return GL2PS_ERROR; |
---|
2092 | } |
---|
2093 | gl2ps->colorsize = colorsize; |
---|
2094 | gl2ps->colormap = (GL2PSrgba*)gl2psMalloc(gl2ps->colorsize * sizeof(GL2PSrgba)); |
---|
2095 | memcpy(gl2ps->colormap, colormap, gl2ps->colorsize * sizeof(GL2PSrgba)); |
---|
2096 | } |
---|
2097 | else{ |
---|
2098 | gl2psMsg(GL2PS_ERROR, "Unknown color mode in gl2psBeginPage"); |
---|
2099 | gl2psFree(gl2ps); |
---|
2100 | gl2ps = NULL; |
---|
2101 | return GL2PS_ERROR; |
---|
2102 | } |
---|
2103 | |
---|
2104 | if(!stream){ |
---|
2105 | gl2psMsg(GL2PS_ERROR, "Bad file pointer"); |
---|
2106 | gl2psFree(gl2ps); |
---|
2107 | gl2ps = NULL; |
---|
2108 | return GL2PS_ERROR; |
---|
2109 | } |
---|
2110 | else{ |
---|
2111 | gl2ps->stream = stream; |
---|
2112 | /* In case gl2psEndPage failed (e.g. due to a GL2PS_OVERFLOW) and |
---|
2113 | we didn't reopen the stream before calling gl2psBeginPage |
---|
2114 | again, we need to rewind the stream */ |
---|
2115 | rewind(gl2ps->stream); |
---|
2116 | } |
---|
2117 | |
---|
2118 | switch(gl2ps->format){ |
---|
2119 | case GL2PS_TEX : |
---|
2120 | gl2psPrintTeXHeader(); |
---|
2121 | break; |
---|
2122 | case GL2PS_PS : |
---|
2123 | case GL2PS_EPS : |
---|
2124 | gl2psPrintPostScriptHeader(); |
---|
2125 | break; |
---|
2126 | default : |
---|
2127 | gl2psMsg(GL2PS_ERROR, "Unknown output format: %d", gl2ps->format); |
---|
2128 | gl2psFree(gl2ps); |
---|
2129 | gl2ps = NULL; |
---|
2130 | return GL2PS_ERROR; |
---|
2131 | } |
---|
2132 | |
---|
2133 | gl2ps->primitives = gl2psListCreate(500, 500, sizeof(GL2PSprimitive*)); |
---|
2134 | gl2ps->feedback = (GLfloat*)gl2psMalloc(gl2ps->buffersize * sizeof(GLfloat)); |
---|
2135 | glFeedbackBuffer(gl2ps->buffersize, GL_3D_COLOR, gl2ps->feedback); |
---|
2136 | glRenderMode(GL_FEEDBACK); |
---|
2137 | |
---|
2138 | return GL2PS_SUCCESS; |
---|
2139 | } |
---|
2140 | |
---|
2141 | GL2PSDLL_API GLint gl2psEndPage(void){ |
---|
2142 | GLint res; |
---|
2143 | |
---|
2144 | if(!gl2ps) return GL2PS_UNINITIALIZED; |
---|
2145 | |
---|
2146 | res = gl2psPrintPrimitives(); |
---|
2147 | |
---|
2148 | /* print the footer even if gl2psPrintPrimitives didn't succeed, so |
---|
2149 | that we end up with a valid file */ |
---|
2150 | switch(gl2ps->format){ |
---|
2151 | case GL2PS_TEX : |
---|
2152 | gl2psPrintTeXFooter(); |
---|
2153 | break; |
---|
2154 | case GL2PS_PS : |
---|
2155 | case GL2PS_EPS : |
---|
2156 | gl2psPrintPostScriptFooter(); |
---|
2157 | break; |
---|
2158 | } |
---|
2159 | |
---|
2160 | fflush(gl2ps->stream); |
---|
2161 | |
---|
2162 | gl2psListDelete(gl2ps->primitives); |
---|
2163 | gl2psFree(gl2ps->colormap); |
---|
2164 | gl2psFree(gl2ps->feedback); |
---|
2165 | gl2psFree(gl2ps); |
---|
2166 | gl2ps = NULL; |
---|
2167 | |
---|
2168 | return res; |
---|
2169 | } |
---|
2170 | |
---|
2171 | GL2PSDLL_API GLint gl2psBeginViewport(GLint viewport[4]){ |
---|
2172 | if(!gl2ps) return GL2PS_UNINITIALIZED; |
---|
2173 | |
---|
2174 | switch(gl2ps->format){ |
---|
2175 | case GL2PS_EPS : |
---|
2176 | gl2psPrintPostScriptBeginViewport(viewport); |
---|
2177 | break; |
---|
2178 | default : |
---|
2179 | /* FIXME: handle other formats */ |
---|
2180 | break; |
---|
2181 | } |
---|
2182 | |
---|
2183 | return GL2PS_SUCCESS; |
---|
2184 | } |
---|
2185 | |
---|
2186 | GL2PSDLL_API GLint gl2psEndViewport(void){ |
---|
2187 | GLint res; |
---|
2188 | |
---|
2189 | if(!gl2ps) return GL2PS_UNINITIALIZED; |
---|
2190 | |
---|
2191 | switch(gl2ps->format){ |
---|
2192 | case GL2PS_EPS : |
---|
2193 | res = gl2psPrintPostScriptEndViewport(); |
---|
2194 | break; |
---|
2195 | default : |
---|
2196 | /* FIXME: handle other formats */ |
---|
2197 | res = GL2PS_SUCCESS; |
---|
2198 | break; |
---|
2199 | } |
---|
2200 | |
---|
2201 | return res; |
---|
2202 | } |
---|
2203 | |
---|
2204 | GL2PSDLL_API GLint gl2psText(const char *str, const char *fontname, GLshort fontsize){ |
---|
2205 | GLfloat pos[4]; |
---|
2206 | GL2PSprimitive *prim; |
---|
2207 | GLboolean valid; |
---|
2208 | |
---|
2209 | if(!gl2ps || !str) return GL2PS_UNINITIALIZED; |
---|
2210 | |
---|
2211 | if(gl2ps->options & GL2PS_NO_TEXT) return GL2PS_SUCCESS; |
---|
2212 | |
---|
2213 | glGetBooleanv(GL_CURRENT_RASTER_POSITION_VALID, &valid); |
---|
2214 | if(!valid) return GL2PS_SUCCESS; /* the primitive is culled */ |
---|
2215 | |
---|
2216 | glGetFloatv(GL_CURRENT_RASTER_POSITION, pos); |
---|
2217 | |
---|
2218 | prim = (GL2PSprimitive *)gl2psMalloc(sizeof(GL2PSprimitive)); |
---|
2219 | prim->type = GL2PS_TEXT; |
---|
2220 | prim->boundary = 0; |
---|
2221 | prim->numverts = 1; |
---|
2222 | prim->verts = (GL2PSvertex *)gl2psMalloc(sizeof(GL2PSvertex)); |
---|
2223 | prim->verts[0].xyz[0] = pos[0]; |
---|
2224 | prim->verts[0].xyz[1] = pos[1]; |
---|
2225 | prim->verts[0].xyz[2] = GL2PS_DEPTH_FACT * pos[2]; |
---|
2226 | prim->depth = pos[2]; |
---|
2227 | prim->culled = 0; |
---|
2228 | prim->dash = 0; |
---|
2229 | prim->width = 1; |
---|
2230 | glGetFloatv(GL_CURRENT_RASTER_COLOR, prim->verts[0].rgba); |
---|
2231 | prim->text = (GL2PSstring*)gl2psMalloc(sizeof(GL2PSstring)); |
---|
2232 | prim->text->str = (char*)gl2psMalloc((strlen(str)+1)*sizeof(char)); |
---|
2233 | strcpy(prim->text->str, str); |
---|
2234 | prim->text->fontname = (char*)gl2psMalloc((strlen(fontname)+1)*sizeof(char)); |
---|
2235 | strcpy(prim->text->fontname, fontname); |
---|
2236 | prim->text->fontsize = fontsize; |
---|
2237 | |
---|
2238 | gl2psListAdd(gl2ps->primitives, &prim); |
---|
2239 | |
---|
2240 | return GL2PS_SUCCESS; |
---|
2241 | } |
---|
2242 | |
---|
2243 | GL2PSDLL_API GLint gl2psDrawPixels(GLsizei width, GLsizei height, |
---|
2244 | GLint xorig, GLint yorig, |
---|
2245 | GLenum format, GLenum type, |
---|
2246 | const void *pixels){ |
---|
2247 | int size; |
---|
2248 | GLfloat pos[4]; |
---|
2249 | GL2PSprimitive *prim; |
---|
2250 | GLboolean valid; |
---|
2251 | |
---|
2252 | if(!gl2ps || !pixels) return GL2PS_UNINITIALIZED; |
---|
2253 | |
---|
2254 | if((width <= 0) || (height <= 0)) return GL2PS_ERROR; |
---|
2255 | |
---|
2256 | if(gl2ps->options & GL2PS_NO_PIXMAP) return GL2PS_SUCCESS; |
---|
2257 | |
---|
2258 | if(format != GL_RGB || type != GL_FLOAT){ |
---|
2259 | gl2psMsg(GL2PS_ERROR, "gl2psDrawPixels only implemented for GL_RGB, GL_FLOAT pixels"); |
---|
2260 | return GL2PS_ERROR; |
---|
2261 | } |
---|
2262 | |
---|
2263 | glGetBooleanv(GL_CURRENT_RASTER_POSITION_VALID, &valid); |
---|
2264 | if(!valid) return GL2PS_SUCCESS; /* the primitive is culled */ |
---|
2265 | |
---|
2266 | glGetFloatv(GL_CURRENT_RASTER_POSITION, pos); |
---|
2267 | |
---|
2268 | prim = (GL2PSprimitive *)gl2psMalloc(sizeof(GL2PSprimitive)); |
---|
2269 | prim->type = GL2PS_PIXMAP; |
---|
2270 | prim->boundary = 0; |
---|
2271 | prim->numverts = 1; |
---|
2272 | prim->verts = (GL2PSvertex *)gl2psMalloc(sizeof(GL2PSvertex)); |
---|
2273 | prim->verts[0].xyz[0] = pos[0] + xorig; |
---|
2274 | prim->verts[0].xyz[1] = pos[1] + yorig; |
---|
2275 | prim->verts[0].xyz[2] = GL2PS_DEPTH_FACT * pos[2]; |
---|
2276 | prim->depth = pos[2]; |
---|
2277 | prim->culled = 0; |
---|
2278 | prim->dash = 0; |
---|
2279 | prim->width = 1; |
---|
2280 | glGetFloatv(GL_CURRENT_RASTER_COLOR, prim->verts[0].rgba); |
---|
2281 | prim->image = (GL2PSimage*)gl2psMalloc(sizeof(GL2PSimage)); |
---|
2282 | prim->image->width = width; |
---|
2283 | prim->image->height = height; |
---|
2284 | prim->image->format = format; |
---|
2285 | prim->image->type = type; |
---|
2286 | size = height*width*3*sizeof(GLfloat); /* FIXME: generalize to other types/formats */ |
---|
2287 | prim->image->pixels = (GLfloat*)gl2psMalloc(size); |
---|
2288 | memcpy(prim->image->pixels, pixels, size); |
---|
2289 | |
---|
2290 | gl2psListAdd(gl2ps->primitives, &prim); |
---|
2291 | |
---|
2292 | return GL2PS_SUCCESS; |
---|
2293 | } |
---|
2294 | |
---|
2295 | GL2PSDLL_API GLint gl2psEnable(GLint mode){ |
---|
2296 | if(!gl2ps) return GL2PS_UNINITIALIZED; |
---|
2297 | |
---|
2298 | switch(mode){ |
---|
2299 | case GL2PS_POLYGON_OFFSET_FILL : |
---|
2300 | glPassThrough(GL2PS_BEGIN_POLYGON_OFFSET_FILL); |
---|
2301 | glGetFloatv(GL_POLYGON_OFFSET_FACTOR, &gl2ps->offset[0]); |
---|
2302 | glGetFloatv(GL_POLYGON_OFFSET_UNITS, &gl2ps->offset[1]); |
---|
2303 | break; |
---|
2304 | case GL2PS_POLYGON_BOUNDARY : |
---|
2305 | glPassThrough(GL2PS_BEGIN_POLYGON_BOUNDARY); |
---|
2306 | break; |
---|
2307 | case GL2PS_LINE_STIPPLE : |
---|
2308 | glPassThrough(GL2PS_BEGIN_LINE_STIPPLE); |
---|
2309 | break; |
---|
2310 | default : |
---|
2311 | gl2psMsg(GL2PS_WARNING, "Unknown mode in gl2psEnable: %d", mode); |
---|
2312 | return GL2PS_WARNING; |
---|
2313 | } |
---|
2314 | |
---|
2315 | return GL2PS_SUCCESS; |
---|
2316 | } |
---|
2317 | |
---|
2318 | GL2PSDLL_API GLint gl2psDisable(GLint mode){ |
---|
2319 | if(!gl2ps) return GL2PS_UNINITIALIZED; |
---|
2320 | |
---|
2321 | switch(mode){ |
---|
2322 | case GL2PS_POLYGON_OFFSET_FILL : |
---|
2323 | glPassThrough(GL2PS_END_POLYGON_OFFSET_FILL); |
---|
2324 | break; |
---|
2325 | case GL2PS_POLYGON_BOUNDARY : |
---|
2326 | glPassThrough(GL2PS_END_POLYGON_BOUNDARY); |
---|
2327 | break; |
---|
2328 | case GL2PS_LINE_STIPPLE : |
---|
2329 | glPassThrough(GL2PS_END_LINE_STIPPLE); |
---|
2330 | break; |
---|
2331 | default : |
---|
2332 | gl2psMsg(GL2PS_WARNING, "Unknown mode in gl2psDisable: %d", mode); |
---|
2333 | return GL2PS_WARNING; |
---|
2334 | } |
---|
2335 | |
---|
2336 | return GL2PS_SUCCESS; |
---|
2337 | } |
---|
2338 | |
---|
2339 | GL2PSDLL_API GLint gl2psPointSize(GLfloat value){ |
---|
2340 | if(!gl2ps) return GL2PS_UNINITIALIZED; |
---|
2341 | |
---|
2342 | glPassThrough(GL2PS_SET_POINT_SIZE); |
---|
2343 | glPassThrough(value); |
---|
2344 | |
---|
2345 | return GL2PS_SUCCESS; |
---|
2346 | } |
---|
2347 | |
---|
2348 | GL2PSDLL_API GLint gl2psLineWidth(GLfloat value){ |
---|
2349 | if(!gl2ps) return GL2PS_UNINITIALIZED; |
---|
2350 | |
---|
2351 | glPassThrough(GL2PS_SET_LINE_WIDTH); |
---|
2352 | glPassThrough(value); |
---|
2353 | |
---|
2354 | return GL2PS_SUCCESS; |
---|
2355 | } |
---|
2356 | |
---|
2357 | #endif |
---|