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Rev | Author | Line No. | Line |
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5098 | clevermous | 1 | /* |
2 | * Texture Manager |
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3 | */ |
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4 | |||
5 | #include "zgl.h" |
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6 | |||
7 | static GLTexture *find_texture(GLContext *c,int h) |
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8 | { |
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9 | GLTexture *t; |
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10 | |||
11 | t=c->shared_state.texture_hash_table[h % TEXTURE_HASH_TABLE_SIZE]; |
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12 | while (t!=NULL) { |
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13 | if (t->handle == h) return t; |
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14 | t=t->next; |
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15 | } |
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16 | return NULL; |
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17 | } |
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18 | |||
19 | static void free_texture(GLContext *c,int h) |
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20 | { |
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21 | GLTexture *t,**ht; |
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22 | GLImage *im; |
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23 | int i; |
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24 | |||
25 | t=find_texture(c,h); |
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26 | if (t->prev==NULL) { |
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27 | ht=&c->shared_state.texture_hash_table |
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28 | [t->handle % TEXTURE_HASH_TABLE_SIZE]; |
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29 | *ht=t->next; |
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30 | } else { |
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31 | t->prev->next=t->next; |
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32 | } |
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33 | if (t->next!=NULL) t->next->prev=t->prev; |
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34 | |||
35 | for(i=0;i |
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36 | im=&t->images[i]; |
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37 | if (im->pixmap != NULL) gl_free(im->pixmap); |
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38 | } |
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39 | |||
40 | gl_free(t); |
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41 | } |
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42 | |||
43 | GLTexture *alloc_texture(GLContext *c,int h) |
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44 | { |
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45 | GLTexture *t,**ht; |
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46 | |||
47 | t=gl_zalloc(sizeof(GLTexture)); |
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48 | |||
49 | ht=&c->shared_state.texture_hash_table[h % TEXTURE_HASH_TABLE_SIZE]; |
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50 | |||
51 | t->next=*ht; |
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52 | t->prev=NULL; |
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53 | if (t->next != NULL) t->next->prev=t; |
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54 | *ht=t; |
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55 | |||
56 | t->handle=h; |
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57 | |||
58 | return t; |
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59 | } |
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60 | |||
61 | |||
62 | void glInitTextures(GLContext *c) |
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63 | { |
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64 | /* textures */ |
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65 | |||
66 | c->texture_2d_enabled=0; |
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67 | c->current_texture=find_texture(c,0); |
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68 | } |
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69 | |||
70 | void glGenTextures(int n, unsigned int *textures) |
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71 | { |
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72 | GLContext *c=gl_get_context(); |
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73 | int max,i; |
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74 | GLTexture *t; |
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75 | |||
76 | max=0; |
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77 | for(i=0;i |
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78 | t=c->shared_state.texture_hash_table[i]; |
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79 | while (t!=NULL) { |
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80 | if (t->handle>max) max=t->handle; |
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81 | t=t->next; |
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82 | } |
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83 | |||
84 | } |
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85 | for(i=0;i |
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86 | textures[i]=max+i+1; |
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87 | } |
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88 | } |
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89 | |||
90 | |||
91 | void glDeleteTextures(int n, const unsigned int *textures) |
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92 | { |
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93 | GLContext *c=gl_get_context(); |
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94 | int i; |
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95 | GLTexture *t; |
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96 | |||
97 | for(i=0;i |
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98 | t=find_texture(c,textures[i]); |
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99 | if (t!=NULL && t!=0) { |
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100 | if (t==c->current_texture) { |
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101 | glBindTexture(GL_TEXTURE_2D,0); |
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102 | } |
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103 | free_texture(c,textures[i]); |
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104 | } |
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105 | } |
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106 | } |
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107 | |||
108 | |||
109 | void glopBindTexture(GLContext *c,GLParam *p) |
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110 | { |
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111 | int target=p[1].i; |
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112 | int texture=p[2].i; |
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113 | GLTexture *t; |
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114 | |||
115 | assert(target == GL_TEXTURE_2D && texture >= 0); |
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116 | |||
117 | t=find_texture(c,texture); |
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118 | if (t==NULL) { |
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119 | t=alloc_texture(c,texture); |
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120 | } |
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121 | c->current_texture=t; |
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122 | } |
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123 | |||
124 | void glopTexImage2D(GLContext *c,GLParam *p) |
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125 | { |
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126 | int target=p[1].i; |
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127 | int level=p[2].i; |
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128 | int components=p[3].i; |
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129 | int width=p[4].i; |
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130 | int height=p[5].i; |
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131 | int border=p[6].i; |
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132 | int format=p[7].i; |
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133 | int type=p[8].i; |
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134 | void *pixels=p[9].p; |
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135 | GLImage *im; |
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136 | unsigned char *pixels1; |
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137 | int do_free; |
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138 | |||
139 | if (!(target == GL_TEXTURE_2D && level == 0 && components == 3 && |
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140 | border == 0 && format == GL_RGB && |
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141 | type == GL_UNSIGNED_BYTE)) { |
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142 | gl_fatal_error("glTexImage2D: combinaison of parameters not handled"); |
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143 | } |
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144 | |||
145 | do_free=0; |
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146 | if (width != 256 || height != 256) { |
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147 | pixels1 = gl_malloc(256 * 256 * 3); |
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148 | /* no interpolation is done here to respect the original image aliasing ! */ |
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149 | gl_resizeImageNoInterpolate(pixels1,256,256,pixels,width,height); |
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150 | do_free=1; |
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151 | width=256; |
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152 | height=256; |
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153 | } else { |
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154 | pixels1=pixels; |
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155 | } |
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156 | |||
157 | im=&c->current_texture->images[level]; |
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158 | im->xsize=width; |
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159 | im->ysize=height; |
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160 | if (im->pixmap!=NULL) gl_free(im->pixmap); |
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161 | #if TGL_FEATURE_RENDER_BITS == 24 |
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162 | im->pixmap=gl_malloc(width*height*3); |
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163 | if(im->pixmap) { |
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164 | memcpy(im->pixmap,pixels1,width*height*3); |
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165 | } |
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166 | #elif TGL_FEATURE_RENDER_BITS == 32 |
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167 | im->pixmap=gl_malloc(width*height*4); |
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168 | if(im->pixmap) { |
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169 | gl_convertRGB_to_8A8R8G8B(im->pixmap,pixels1,width,height); |
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170 | } |
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171 | #elif TGL_FEATURE_RENDER_BITS == 16 |
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172 | im->pixmap=gl_malloc(width*height*2); |
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173 | if(im->pixmap) { |
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174 | gl_convertRGB_to_5R6G5B(im->pixmap,pixels1,width,height); |
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175 | } |
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176 | #else |
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177 | #error TODO |
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178 | #endif |
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179 | if (do_free) gl_free(pixels1); |
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180 | } |
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181 | |||
182 | |||
183 | /* TODO: not all tests are done */ |
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184 | void glopTexEnv(GLContext *c,GLParam *p) |
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185 | { |
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186 | int target=p[1].i; |
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187 | int pname=p[2].i; |
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188 | int param=p[3].i; |
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189 | |||
190 | if (target != GL_TEXTURE_ENV) { |
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191 | error: |
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192 | gl_fatal_error("glTexParameter: unsupported option"); |
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193 | } |
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194 | |||
195 | if (pname != GL_TEXTURE_ENV_MODE) goto error; |
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196 | |||
197 | if (param != GL_DECAL) goto error; |
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198 | } |
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199 | |||
200 | /* TODO: not all tests are done */ |
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201 | void glopTexParameter(GLContext *c,GLParam *p) |
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202 | { |
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203 | int target=p[1].i; |
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204 | int pname=p[2].i; |
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205 | int param=p[3].i; |
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206 | |||
207 | if (target != GL_TEXTURE_2D) { |
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208 | error: |
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209 | gl_fatal_error("glTexParameter: unsupported option"); |
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210 | } |
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211 | |||
212 | switch(pname) { |
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213 | case GL_TEXTURE_WRAP_S: |
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214 | case GL_TEXTURE_WRAP_T: |
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215 | if (param != GL_REPEAT) goto error; |
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216 | break; |
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217 | } |
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218 | } |
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219 | |||
220 | void glopPixelStore(GLContext *c,GLParam *p) |
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221 | { |
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222 | int pname=p[1].i; |
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223 | int param=p[2].i; |
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224 | |||
225 | if (pname != GL_UNPACK_ALIGNMENT || |
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226 | param != 1) { |
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227 | gl_fatal_error("glPixelStore: unsupported option"); |
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228 | } |
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229 | } |