avoid a memory allocation on each directly uploaded texture
[divverent/darkplaces.git] / gl_textures.c
1
2 #include "quakedef.h"
3 #include "image.h"
4 #include "jpeg.h"
5 #include "image_png.h"
6
7 cvar_t gl_max_size = {CVAR_SAVE, "gl_max_size", "2048", "maximum allowed texture size, can be used to reduce video memory usage, note: this is automatically reduced to match video card capabilities (such as 256 on 3Dfx cards before Voodoo4/5)"};
8 cvar_t gl_picmip = {CVAR_SAVE, "gl_picmip", "0", "reduces resolution of textures by powers of 2, for example 1 will halve width/height, reducing texture memory usage by 75%"};
9 cvar_t r_lerpimages = {CVAR_SAVE, "r_lerpimages", "1", "bilinear filters images when scaling them up to power of 2 size (mode 1), looks better than glquake (mode 0)"};
10 cvar_t r_precachetextures = {CVAR_SAVE, "r_precachetextures", "1", "0 = never upload textures until used, 1 = upload most textures before use (exceptions: rarely used skin colormap layers), 2 = upload all textures before use (can increase texture memory usage significantly)"};
11 cvar_t gl_texture_anisotropy = {CVAR_SAVE, "gl_texture_anisotropy", "1", "anisotropic filtering quality (if supported by hardware), 1 sample (no anisotropy) and 8 sample (8 tap anisotropy) are recommended values"};
12 cvar_t gl_texturecompression = {CVAR_SAVE, "gl_texturecompression", "0", "whether to compress textures, a value of 0 disables compression (even if the individual cvars are 1), 1 enables fast (low quality) compression at startup, 2 enables slow (high quality) compression at startup"};
13 cvar_t gl_texturecompression_color = {CVAR_SAVE, "gl_texturecompression_color", "1", "whether to compress colormap (diffuse) textures"};
14 cvar_t gl_texturecompression_normal = {CVAR_SAVE, "gl_texturecompression_normal", "0", "whether to compress normalmap (normalmap) textures"};
15 cvar_t gl_texturecompression_gloss = {CVAR_SAVE, "gl_texturecompression_gloss", "1", "whether to compress glossmap (specular) textures"};
16 cvar_t gl_texturecompression_glow = {CVAR_SAVE, "gl_texturecompression_glow", "1", "whether to compress glowmap (luma) textures"};
17 cvar_t gl_texturecompression_2d = {CVAR_SAVE, "gl_texturecompression_2d", "0", "whether to compress 2d (hud/menu) textures other than the font"};
18 cvar_t gl_texturecompression_q3bsplightmaps = {CVAR_SAVE, "gl_texturecompression_q3bsplightmaps", "0", "whether to compress lightmaps in q3bsp format levels"};
19 cvar_t gl_texturecompression_q3bspdeluxemaps = {CVAR_SAVE, "gl_texturecompression_q3bspdeluxemaps", "0", "whether to compress deluxemaps in q3bsp format levels (only levels compiled with q3map2 -deluxe have these)"};
20 cvar_t gl_texturecompression_sky = {CVAR_SAVE, "gl_texturecompression_sky", "0", "whether to compress sky textures"};
21 cvar_t gl_texturecompression_lightcubemaps = {CVAR_SAVE, "gl_texturecompression_lightcubemaps", "1", "whether to compress light cubemaps (spotlights and other light projection images)"};
22
23 int             gl_filter_min = GL_LINEAR_MIPMAP_LINEAR;
24 int             gl_filter_mag = GL_LINEAR;
25
26
27 static mempool_t *texturemempool;
28
29 // note: this must not conflict with TEXF_ flags in r_textures.h
30 // cleared when a texture is uploaded
31 #define GLTEXF_UPLOAD           0x00010000
32 // bitmask for mismatch checking
33 #define GLTEXF_IMPORTANTBITS (0)
34 // set when image is uploaded and freed
35 #define GLTEXF_DESTROYED        0x00040000
36 // dynamic texture (treat texnum == 0 differently)
37 #define GLTEXF_DYNAMIC          0x00080000
38
39 typedef struct textypeinfo_s
40 {
41         textype_t textype;
42         int inputbytesperpixel;
43         int internalbytesperpixel;
44         float glinternalbytesperpixel;
45         int glformat;
46         int glinternalformat;
47         int gltype;
48 }
49 textypeinfo_t;
50
51 static textypeinfo_t textype_palette                = {TEXTYPE_PALETTE, 1, 4, 4.0f, GL_BGRA   , 3, GL_UNSIGNED_BYTE};
52 static textypeinfo_t textype_palette_alpha          = {TEXTYPE_PALETTE, 1, 4, 4.0f, GL_BGRA   , 4, GL_UNSIGNED_BYTE};
53 static textypeinfo_t textype_palette_compress       = {TEXTYPE_PALETTE, 1, 4, 0.5f, GL_BGRA   , GL_COMPRESSED_RGB_ARB, GL_UNSIGNED_BYTE};
54 static textypeinfo_t textype_palette_alpha_compress = {TEXTYPE_PALETTE, 1, 4, 1.0f, GL_BGRA   , GL_COMPRESSED_RGBA_ARB, GL_UNSIGNED_BYTE};
55 static textypeinfo_t textype_rgba                   = {TEXTYPE_RGBA   , 4, 4, 4.0f, GL_RGBA   , 3, GL_UNSIGNED_BYTE};
56 static textypeinfo_t textype_rgba_alpha             = {TEXTYPE_RGBA   , 4, 4, 4.0f, GL_RGBA   , 4, GL_UNSIGNED_BYTE};
57 static textypeinfo_t textype_rgba_compress          = {TEXTYPE_RGBA   , 4, 4, 0.5f, GL_RGBA   , GL_COMPRESSED_RGB_ARB, GL_UNSIGNED_BYTE};
58 static textypeinfo_t textype_rgba_alpha_compress    = {TEXTYPE_RGBA   , 4, 4, 1.0f, GL_RGBA   , GL_COMPRESSED_RGBA_ARB, GL_UNSIGNED_BYTE};
59 static textypeinfo_t textype_bgra                   = {TEXTYPE_BGRA   , 4, 4, 4.0f, GL_BGRA   , 3, GL_UNSIGNED_BYTE};
60 static textypeinfo_t textype_bgra_alpha             = {TEXTYPE_BGRA   , 4, 4, 4.0f, GL_BGRA   , 4, GL_UNSIGNED_BYTE};
61 static textypeinfo_t textype_bgra_compress          = {TEXTYPE_BGRA   , 4, 4, 0.5f, GL_BGRA   , GL_COMPRESSED_RGB_ARB, GL_UNSIGNED_BYTE};
62 static textypeinfo_t textype_bgra_alpha_compress    = {TEXTYPE_BGRA   , 4, 4, 1.0f, GL_BGRA   , GL_COMPRESSED_RGBA_ARB, GL_UNSIGNED_BYTE};
63 static textypeinfo_t textype_shadowmap16            = {TEXTYPE_SHADOWMAP,2,2, 2.0f, GL_DEPTH_COMPONENT, GL_DEPTH_COMPONENT16_ARB, GL_UNSIGNED_SHORT};
64 static textypeinfo_t textype_shadowmap24            = {TEXTYPE_SHADOWMAP,4,4, 4.0f, GL_DEPTH_COMPONENT, GL_DEPTH_COMPONENT24_ARB, GL_UNSIGNED_INT};
65
66 typedef enum gltexturetype_e
67 {
68         GLTEXTURETYPE_1D,
69         GLTEXTURETYPE_2D,
70         GLTEXTURETYPE_3D,
71         GLTEXTURETYPE_CUBEMAP,
72         GLTEXTURETYPE_RECTANGLE,
73         GLTEXTURETYPE_TOTAL
74 }
75 gltexturetype_t;
76
77 static int gltexturetypeenums[GLTEXTURETYPE_TOTAL] = {GL_TEXTURE_1D, GL_TEXTURE_2D, GL_TEXTURE_3D, GL_TEXTURE_CUBE_MAP_ARB, GL_TEXTURE_RECTANGLE_ARB};
78 static int gltexturetypebindingenums[GLTEXTURETYPE_TOTAL] = {GL_TEXTURE_BINDING_1D, GL_TEXTURE_BINDING_2D, GL_TEXTURE_BINDING_3D, GL_TEXTURE_BINDING_CUBE_MAP_ARB, GL_TEXTURE_BINDING_RECTANGLE_ARB};
79 static int gltexturetypedimensions[GLTEXTURETYPE_TOTAL] = {1, 2, 3, 2, 2};
80 static int cubemapside[6] =
81 {
82         GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB,
83         GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB,
84         GL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB,
85         GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB,
86         GL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB,
87         GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB
88 };
89
90 typedef struct gltexture_s
91 {
92         // this field is exposed to the R_GetTexture macro, for speed reasons
93         // (must be identical in rtexture_t)
94         int texnum; // GL texture slot number
95
96         // dynamic texture stuff [11/22/2007 Black]
97         // used to hold the texture number of dirty textures   
98         int dirtytexnum;
99         updatecallback_t updatecallback;
100         void *updatacallback_data;
101         // --- [11/22/2007 Black]
102
103         // pointer to texturepool (check this to see if the texture is allocated)
104         struct gltexturepool_s *pool;
105         // pointer to next texture in texturepool chain
106         struct gltexture_s *chain;
107         // name of the texture (this might be removed someday), no duplicates
108         char identifier[MAX_QPATH + 32];
109         // original data size in *inputtexels
110         int inputwidth, inputheight, inputdepth;
111         // copy of the original texture(s) supplied to the upload function, for
112         // delayed uploads (non-precached)
113         unsigned char *inputtexels;
114         // original data size in *inputtexels
115         int inputdatasize;
116         // flags supplied to the LoadTexture function
117         // (might be altered to remove TEXF_ALPHA), and GLTEXF_ private flags
118         int flags;
119         // pointer to one of the textype_ structs
120         textypeinfo_t *textype;
121         // one of the GLTEXTURETYPE_ values
122         int texturetype;
123         // palette if the texture is TEXTYPE_PALETTE
124         const unsigned int *palette;
125         // actual stored texture size after gl_picmip and gl_max_size are applied
126         // (power of 2 if gl_support_arb_texture_non_power_of_two is not supported)
127         int tilewidth, tileheight, tiledepth;
128         // 1 or 6 depending on texturetype
129         int sides;
130         // bytes per pixel
131         int bytesperpixel;
132         // GL_RGB or GL_RGBA or GL_DEPTH_COMPONENT
133         int glformat;
134         // 3 or 4
135         int glinternalformat;
136         // GL_UNSIGNED_BYTE or GL_UNSIGNED_INT or GL_UNSIGNED_SHORT or GL_FLOAT
137         int gltype;
138 }
139 gltexture_t;
140
141 #define TEXTUREPOOL_SENTINEL 0xC0DEDBAD
142
143 typedef struct gltexturepool_s
144 {
145         unsigned int sentinel;
146         struct gltexture_s *gltchain;
147         struct gltexturepool_s *next;
148 }
149 gltexturepool_t;
150
151 static gltexturepool_t *gltexturepoolchain = NULL;
152
153 static unsigned char *resizebuffer = NULL, *colorconvertbuffer;
154 static int resizebuffersize = 0;
155 static const unsigned char *texturebuffer;
156 static int texturebuffersize = 0;
157
158 static textypeinfo_t *R_GetTexTypeInfo(textype_t textype, int flags)
159 {
160         if ((flags & TEXF_COMPRESS) && gl_texturecompression.integer >= 1 && gl_support_texture_compression)
161         {
162                 if (flags & TEXF_ALPHA)
163                 {
164                         switch(textype)
165                         {
166                         case TEXTYPE_PALETTE:
167                                 return &textype_palette_alpha_compress;
168                         case TEXTYPE_RGBA:
169                                 return &textype_rgba_alpha_compress;
170                         case TEXTYPE_BGRA:
171                                 return &textype_bgra_alpha_compress;
172                         default:
173                                 Host_Error("R_GetTexTypeInfo: unknown texture format");
174                                 return NULL;
175                         }
176                 }
177                 else
178                 {
179                         switch(textype)
180                         {
181                         case TEXTYPE_PALETTE:
182                                 return &textype_palette_compress;
183                         case TEXTYPE_RGBA:
184                                 return &textype_rgba_compress;
185                         case TEXTYPE_BGRA:
186                                 return &textype_bgra_compress;
187                         default:
188                                 Host_Error("R_GetTexTypeInfo: unknown texture format");
189                                 return NULL;
190                         }
191                 }
192         }
193         else
194         {
195                 if (flags & TEXF_ALPHA)
196                 {
197                         switch(textype)
198                         {
199                         case TEXTYPE_PALETTE:
200                                 return &textype_palette_alpha;
201                         case TEXTYPE_RGBA:
202                                 return &textype_rgba_alpha;
203                         case TEXTYPE_BGRA:
204                                 return &textype_bgra_alpha;
205                         default:
206                                 Host_Error("R_GetTexTypeInfo: unknown texture format");
207                                 return NULL;
208                         }
209                 }
210                 else
211                 {
212                         switch(textype)
213                         {
214                         case TEXTYPE_PALETTE:
215                                 return &textype_palette;
216                         case TEXTYPE_RGBA:
217                                 return &textype_rgba;
218                         case TEXTYPE_BGRA:
219                                 return &textype_bgra;
220                         case TEXTYPE_SHADOWMAP:
221                                 return (flags & TEXF_LOWPRECISION) ? &textype_shadowmap16 : &textype_shadowmap24;
222                         default:
223                                 Host_Error("R_GetTexTypeInfo: unknown texture format");
224                                 return NULL;
225                         }
226                 }
227         }
228         return NULL; // this line only to hush compiler warnings
229 }
230
231 // dynamic texture code [11/22/2007 Black]
232 void R_MarkDirtyTexture(rtexture_t *rt) {
233         gltexture_t *glt = (gltexture_t*) rt;
234         if( !glt ) {
235                 return;
236         }
237
238         // dont do anything if the texture is already dirty (and make sure this *is* a dynamic texture after all!)
239         if( !glt->dirtytexnum && glt->flags & GLTEXF_DYNAMIC ) {
240                 glt->dirtytexnum = glt->texnum;
241                 // mark it as dirty, so R_RealGetTexture gets called
242                 glt->texnum = 0;
243         }
244 }
245
246 void R_MakeTextureDynamic(rtexture_t *rt, updatecallback_t updatecallback, void *data) {
247         gltexture_t *glt = (gltexture_t*) rt;
248         if( !glt ) {
249                 return;
250         }
251
252         glt->flags |= GLTEXF_DYNAMIC;
253         glt->updatecallback = updatecallback;
254         glt->updatacallback_data = data;
255         glt->dirtytexnum = 0;
256 }
257
258 static void R_UpdateDynamicTexture(gltexture_t *glt) {
259         glt->texnum = glt->dirtytexnum;
260         // reset dirtytexnum again (not dirty anymore)
261         glt->dirtytexnum = 0;
262         // TODO: now assert that t->texnum != 0 ?
263         if( glt->updatecallback ) {
264                 glt->updatecallback( (rtexture_t*) glt, glt->updatacallback_data );
265         }
266 }
267
268 void R_PurgeTexture(rtexture_t *rt)
269 {
270         if(rt && !(((gltexture_t*) rt)->flags & TEXF_PERSISTENT)) {
271                 R_FreeTexture(rt);
272         }
273 }
274
275 void R_FreeTexture(rtexture_t *rt)
276 {
277         gltexture_t *glt, **gltpointer;
278
279         glt = (gltexture_t *)rt;
280         if (glt == NULL)
281                 Host_Error("R_FreeTexture: texture == NULL");
282
283         for (gltpointer = &glt->pool->gltchain;*gltpointer && *gltpointer != glt;gltpointer = &(*gltpointer)->chain);
284         if (*gltpointer == glt)
285                 *gltpointer = glt->chain;
286         else
287                 Host_Error("R_FreeTexture: texture \"%s\" not linked in pool", glt->identifier);
288
289         if (!(glt->flags & GLTEXF_UPLOAD))
290         {
291                 CHECKGLERROR
292                 qglDeleteTextures(1, (GLuint *)&glt->texnum);CHECKGLERROR
293         }
294
295         if (glt->inputtexels)
296                 Mem_Free(glt->inputtexels);
297         Mem_Free(glt);
298 }
299
300 rtexturepool_t *R_AllocTexturePool(void)
301 {
302         gltexturepool_t *pool;
303         if (texturemempool == NULL)
304                 return NULL;
305         pool = (gltexturepool_t *)Mem_Alloc(texturemempool, sizeof(gltexturepool_t));
306         if (pool == NULL)
307                 return NULL;
308         pool->next = gltexturepoolchain;
309         gltexturepoolchain = pool;
310         pool->sentinel = TEXTUREPOOL_SENTINEL;
311         return (rtexturepool_t *)pool;
312 }
313
314 void R_FreeTexturePool(rtexturepool_t **rtexturepool)
315 {
316         gltexturepool_t *pool, **poolpointer;
317         if (rtexturepool == NULL)
318                 return;
319         if (*rtexturepool == NULL)
320                 return;
321         pool = (gltexturepool_t *)(*rtexturepool);
322         *rtexturepool = NULL;
323         if (pool->sentinel != TEXTUREPOOL_SENTINEL)
324                 Host_Error("R_FreeTexturePool: pool already freed");
325         for (poolpointer = &gltexturepoolchain;*poolpointer && *poolpointer != pool;poolpointer = &(*poolpointer)->next);
326         if (*poolpointer == pool)
327                 *poolpointer = pool->next;
328         else
329                 Host_Error("R_FreeTexturePool: pool not linked");
330         while (pool->gltchain)
331                 R_FreeTexture((rtexture_t *)pool->gltchain);
332         Mem_Free(pool);
333 }
334
335
336 typedef struct glmode_s
337 {
338         char *name;
339         int minification, magnification;
340 }
341 glmode_t;
342
343 static glmode_t modes[6] =
344 {
345         {"GL_NEAREST", GL_NEAREST, GL_NEAREST},
346         {"GL_LINEAR", GL_LINEAR, GL_LINEAR},
347         {"GL_NEAREST_MIPMAP_NEAREST", GL_NEAREST_MIPMAP_NEAREST, GL_NEAREST},
348         {"GL_LINEAR_MIPMAP_NEAREST", GL_LINEAR_MIPMAP_NEAREST, GL_LINEAR},
349         {"GL_NEAREST_MIPMAP_LINEAR", GL_NEAREST_MIPMAP_LINEAR, GL_NEAREST},
350         {"GL_LINEAR_MIPMAP_LINEAR", GL_LINEAR_MIPMAP_LINEAR, GL_LINEAR}
351 };
352
353 static void GL_TextureMode_f (void)
354 {
355         int i;
356         GLint oldbindtexnum;
357         gltexture_t *glt;
358         gltexturepool_t *pool;
359
360         if (Cmd_Argc() == 1)
361         {
362                 for (i = 0;i < 6;i++)
363                 {
364                         if (gl_filter_min == modes[i].minification)
365                         {
366                                 Con_Printf("%s\n", modes[i].name);
367                                 return;
368                         }
369                 }
370                 Con_Print("current filter is unknown???\n");
371                 return;
372         }
373
374         for (i = 0;i < 6;i++)
375                 if (!strcasecmp (modes[i].name, Cmd_Argv(1) ) )
376                         break;
377         if (i == 6)
378         {
379                 Con_Print("bad filter name\n");
380                 return;
381         }
382
383         gl_filter_min = modes[i].minification;
384         gl_filter_mag = modes[i].magnification;
385
386         // change all the existing mipmap texture objects
387         // FIXME: force renderer(/client/something?) restart instead?
388         CHECKGLERROR
389         for (pool = gltexturepoolchain;pool;pool = pool->next)
390         {
391                 for (glt = pool->gltchain;glt;glt = glt->chain)
392                 {
393                         // only update already uploaded images
394                         if (!(glt->flags & (GLTEXF_UPLOAD | TEXF_FORCENEAREST | TEXF_FORCELINEAR)))
395                         {
396                                 qglGetIntegerv(gltexturetypebindingenums[glt->texturetype], &oldbindtexnum);CHECKGLERROR
397                                 qglBindTexture(gltexturetypeenums[glt->texturetype], glt->texnum);CHECKGLERROR
398                                 if (glt->flags & TEXF_MIPMAP)
399                                 {
400                                         qglTexParameteri(gltexturetypeenums[glt->texturetype], GL_TEXTURE_MIN_FILTER, gl_filter_min);CHECKGLERROR
401                                 }
402                                 else
403                                 {
404                                         qglTexParameteri(gltexturetypeenums[glt->texturetype], GL_TEXTURE_MIN_FILTER, gl_filter_mag);CHECKGLERROR
405                                 }
406                                 qglTexParameteri(gltexturetypeenums[glt->texturetype], GL_TEXTURE_MAG_FILTER, gl_filter_mag);CHECKGLERROR
407                                 qglBindTexture(gltexturetypeenums[glt->texturetype], oldbindtexnum);CHECKGLERROR
408                         }
409                 }
410         }
411 }
412
413 static void GL_Texture_CalcImageSize(int texturetype, int flags, int inwidth, int inheight, int indepth, int *outwidth, int *outheight, int *outdepth)
414 {
415         int picmip = 0, maxsize = 0, width2 = 1, height2 = 1, depth2 = 1;
416
417         if (gl_max_size.integer > gl_max_texture_size)
418                 Cvar_SetValue("gl_max_size", gl_max_texture_size);
419
420         switch (texturetype)
421         {
422         default:
423         case GLTEXTURETYPE_1D:
424         case GLTEXTURETYPE_2D:
425                 maxsize = gl_max_texture_size;
426                 break;
427         case GLTEXTURETYPE_3D:
428                 maxsize = gl_max_3d_texture_size;
429                 break;
430         case GLTEXTURETYPE_CUBEMAP:
431                 maxsize = gl_max_cube_map_texture_size;
432                 break;
433         }
434
435         if (flags & TEXF_PICMIP)
436         {
437                 maxsize = min(maxsize, gl_max_size.integer);
438                 picmip = gl_picmip.integer;
439         }
440
441         if (outwidth)
442         {
443                 if (gl_support_arb_texture_non_power_of_two)
444                         width2 = min(inwidth >> picmip, maxsize);
445                 else
446                 {
447                         for (width2 = 1;width2 < inwidth;width2 <<= 1);
448                         for (width2 >>= picmip;width2 > maxsize;width2 >>= 1);
449                 }
450                 *outwidth = max(1, width2);
451         }
452         if (outheight)
453         {
454                 if (gl_support_arb_texture_non_power_of_two)
455                         height2 = min(inheight >> picmip, maxsize);
456                 else
457                 {
458                         for (height2 = 1;height2 < inheight;height2 <<= 1);
459                         for (height2 >>= picmip;height2 > maxsize;height2 >>= 1);
460                 }
461                 *outheight = max(1, height2);
462         }
463         if (outdepth)
464         {
465                 if (gl_support_arb_texture_non_power_of_two)
466                         depth2 = min(indepth >> picmip, maxsize);
467                 else
468                 {
469                         for (depth2 = 1;depth2 < indepth;depth2 <<= 1);
470                         for (depth2 >>= picmip;depth2 > maxsize;depth2 >>= 1);
471                 }
472                 *outdepth = max(1, depth2);
473         }
474 }
475
476
477 static int R_CalcTexelDataSize (gltexture_t *glt)
478 {
479         int width2, height2, depth2, size;
480
481         GL_Texture_CalcImageSize(glt->texturetype, glt->flags, glt->inputwidth, glt->inputheight, glt->inputdepth, &width2, &height2, &depth2);
482
483         size = width2 * height2 * depth2;
484
485         if (glt->flags & TEXF_MIPMAP)
486         {
487                 while (width2 > 1 || height2 > 1 || depth2 > 1)
488                 {
489                         if (width2 > 1)
490                                 width2 >>= 1;
491                         if (height2 > 1)
492                                 height2 >>= 1;
493                         if (depth2 > 1)
494                                 depth2 >>= 1;
495                         size += width2 * height2 * depth2;
496                 }
497         }
498
499         return (int)(size * glt->textype->glinternalbytesperpixel) * glt->sides;
500 }
501
502 void R_TextureStats_Print(qboolean printeach, qboolean printpool, qboolean printtotal)
503 {
504         int glsize;
505         int isloaded;
506         int pooltotal = 0, pooltotalt = 0, pooltotalp = 0, poolloaded = 0, poolloadedt = 0, poolloadedp = 0;
507         int sumtotal = 0, sumtotalt = 0, sumtotalp = 0, sumloaded = 0, sumloadedt = 0, sumloadedp = 0;
508         gltexture_t *glt;
509         gltexturepool_t *pool;
510         if (printeach)
511                 Con_Print("glsize input loaded mip alpha name\n");
512         for (pool = gltexturepoolchain;pool;pool = pool->next)
513         {
514                 pooltotal = 0;
515                 pooltotalt = 0;
516                 pooltotalp = 0;
517                 poolloaded = 0;
518                 poolloadedt = 0;
519                 poolloadedp = 0;
520                 for (glt = pool->gltchain;glt;glt = glt->chain)
521                 {
522                         glsize = R_CalcTexelDataSize(glt);
523                         isloaded = !(glt->flags & GLTEXF_UPLOAD);
524                         pooltotal++;
525                         pooltotalt += glsize;
526                         pooltotalp += glt->inputdatasize;
527                         if (isloaded)
528                         {
529                                 poolloaded++;
530                                 poolloadedt += glsize;
531                                 poolloadedp += glt->inputdatasize;
532                         }
533                         if (printeach)
534                                 Con_Printf("%c%4i%c%c%4i%c %s %s %s %s\n", isloaded ? '[' : ' ', (glsize + 1023) / 1024, isloaded ? ']' : ' ', glt->inputtexels ? '[' : ' ', (glt->inputdatasize + 1023) / 1024, glt->inputtexels ? ']' : ' ', isloaded ? "loaded" : "      ", (glt->flags & TEXF_MIPMAP) ? "mip" : "   ", (glt->flags & TEXF_ALPHA) ? "alpha" : "     ", glt->identifier);
535                 }
536                 if (printpool)
537                         Con_Printf("texturepool %10p total: %i (%.3fMB, %.3fMB original), uploaded %i (%.3fMB, %.3fMB original), upload on demand %i (%.3fMB, %.3fMB original)\n", (void *)pool, pooltotal, pooltotalt / 1048576.0, pooltotalp / 1048576.0, poolloaded, poolloadedt / 1048576.0, poolloadedp / 1048576.0, pooltotal - poolloaded, (pooltotalt - poolloadedt) / 1048576.0, (pooltotalp - poolloadedp) / 1048576.0);
538                 sumtotal += pooltotal;
539                 sumtotalt += pooltotalt;
540                 sumtotalp += pooltotalp;
541                 sumloaded += poolloaded;
542                 sumloadedt += poolloadedt;
543                 sumloadedp += poolloadedp;
544         }
545         if (printtotal)
546                 Con_Printf("textures total: %i (%.3fMB, %.3fMB original), uploaded %i (%.3fMB, %.3fMB original), upload on demand %i (%.3fMB, %.3fMB original)\n", sumtotal, sumtotalt / 1048576.0, sumtotalp / 1048576.0, sumloaded, sumloadedt / 1048576.0, sumloadedp / 1048576.0, sumtotal - sumloaded, (sumtotalt - sumloadedt) / 1048576.0, (sumtotalp - sumloadedp) / 1048576.0);
547 }
548
549 static void R_TextureStats_f(void)
550 {
551         R_TextureStats_Print(true, true, true);
552 }
553
554 static void r_textures_start(void)
555 {
556         // LordHavoc: allow any alignment
557         CHECKGLERROR
558         qglPixelStorei(GL_UNPACK_ALIGNMENT, 1);CHECKGLERROR
559         qglPixelStorei(GL_PACK_ALIGNMENT, 1);CHECKGLERROR
560
561         texturemempool = Mem_AllocPool("texture management", 0, NULL);
562
563         // Disable JPEG screenshots if the DLL isn't loaded
564         if (! JPEG_OpenLibrary ())
565                 Cvar_SetValueQuick (&scr_screenshot_jpeg, 0);
566         // TODO: support png screenshots?
567         PNG_OpenLibrary ();
568 }
569
570 static void r_textures_shutdown(void)
571 {
572         rtexturepool_t *temp;
573
574         JPEG_CloseLibrary ();
575
576         while(gltexturepoolchain)
577         {
578                 temp = (rtexturepool_t *) gltexturepoolchain;
579                 R_FreeTexturePool(&temp);
580         }
581
582         resizebuffersize = 0;
583         texturebuffersize = 0;
584         resizebuffer = NULL;
585         colorconvertbuffer = NULL;
586         texturebuffer = NULL;
587         Mem_FreePool(&texturemempool);
588 }
589
590 static void r_textures_newmap(void)
591 {
592 }
593
594 void R_Textures_Init (void)
595 {
596         Cmd_AddCommand("gl_texturemode", &GL_TextureMode_f, "set texture filtering mode (GL_NEAREST, GL_LINEAR, GL_LINEAR_MIPMAP_LINEAR, etc)");
597         Cmd_AddCommand("r_texturestats", R_TextureStats_f, "print information about all loaded textures and some statistics");
598         Cvar_RegisterVariable (&gl_max_size);
599         Cvar_RegisterVariable (&gl_picmip);
600         Cvar_RegisterVariable (&r_lerpimages);
601         Cvar_RegisterVariable (&r_precachetextures);
602         Cvar_RegisterVariable (&gl_texture_anisotropy);
603         Cvar_RegisterVariable (&gl_texturecompression);
604         Cvar_RegisterVariable (&gl_texturecompression_color);
605         Cvar_RegisterVariable (&gl_texturecompression_normal);
606         Cvar_RegisterVariable (&gl_texturecompression_gloss);
607         Cvar_RegisterVariable (&gl_texturecompression_glow);
608         Cvar_RegisterVariable (&gl_texturecompression_2d);
609         Cvar_RegisterVariable (&gl_texturecompression_q3bsplightmaps);
610         Cvar_RegisterVariable (&gl_texturecompression_q3bspdeluxemaps);
611         Cvar_RegisterVariable (&gl_texturecompression_sky);
612         Cvar_RegisterVariable (&gl_texturecompression_lightcubemaps);
613
614         R_RegisterModule("R_Textures", r_textures_start, r_textures_shutdown, r_textures_newmap);
615 }
616
617 void R_Textures_Frame (void)
618 {
619         static int old_aniso = 0;
620
621         // could do procedural texture animation here, if we keep track of which
622         // textures were accessed this frame...
623
624         // free the resize buffers
625         resizebuffersize = 0;
626         if (resizebuffer)
627         {
628                 Mem_Free(resizebuffer);
629                 resizebuffer = NULL;
630         }
631         if (colorconvertbuffer)
632         {
633                 Mem_Free(colorconvertbuffer);
634                 colorconvertbuffer = NULL;
635         }
636
637         if (old_aniso != gl_texture_anisotropy.integer)
638         {
639                 gltexture_t *glt;
640                 gltexturepool_t *pool;
641                 GLint oldbindtexnum;
642
643                 old_aniso = bound(1, gl_texture_anisotropy.integer, gl_max_anisotropy);
644
645                 Cvar_SetValueQuick(&gl_texture_anisotropy, old_aniso);
646
647                 CHECKGLERROR
648                 for (pool = gltexturepoolchain;pool;pool = pool->next)
649                 {
650                         for (glt = pool->gltchain;glt;glt = glt->chain)
651                         {
652                                 // only update already uploaded images
653                                 if ((glt->flags & (GLTEXF_UPLOAD | TEXF_MIPMAP)) == TEXF_MIPMAP)
654                                 {
655                                         qglGetIntegerv(gltexturetypebindingenums[glt->texturetype], &oldbindtexnum);CHECKGLERROR
656
657                                         qglBindTexture(gltexturetypeenums[glt->texturetype], glt->texnum);CHECKGLERROR
658                                         qglTexParameteri(gltexturetypeenums[glt->texturetype], GL_TEXTURE_MAX_ANISOTROPY_EXT, old_aniso);CHECKGLERROR
659
660                                         qglBindTexture(gltexturetypeenums[glt->texturetype], oldbindtexnum);CHECKGLERROR
661                                 }
662                         }
663                 }
664         }
665 }
666
667 void R_MakeResizeBufferBigger(int size)
668 {
669         if (resizebuffersize < size)
670         {
671                 resizebuffersize = size;
672                 if (resizebuffer)
673                         Mem_Free(resizebuffer);
674                 if (colorconvertbuffer)
675                         Mem_Free(colorconvertbuffer);
676                 resizebuffer = (unsigned char *)Mem_Alloc(texturemempool, resizebuffersize);
677                 colorconvertbuffer = (unsigned char *)Mem_Alloc(texturemempool, resizebuffersize);
678                 if (!resizebuffer || !colorconvertbuffer)
679                         Host_Error("R_Upload: out of memory");
680         }
681 }
682
683 static void GL_SetupTextureParameters(int flags, textype_t textype, int texturetype)
684 {
685         int textureenum = gltexturetypeenums[texturetype];
686         int wrapmode = ((flags & TEXF_CLAMP) && gl_support_clamptoedge) ? GL_CLAMP_TO_EDGE : GL_REPEAT;
687
688         CHECKGLERROR
689
690         if (gl_support_anisotropy && (flags & TEXF_MIPMAP))
691         {
692                 int aniso = bound(1, gl_texture_anisotropy.integer, gl_max_anisotropy);
693                 if (gl_texture_anisotropy.integer != aniso)
694                         Cvar_SetValueQuick(&gl_texture_anisotropy, aniso);
695                 qglTexParameteri(textureenum, GL_TEXTURE_MAX_ANISOTROPY_EXT, aniso);CHECKGLERROR
696         }
697         qglTexParameteri(textureenum, GL_TEXTURE_WRAP_S, wrapmode);CHECKGLERROR
698         qglTexParameteri(textureenum, GL_TEXTURE_WRAP_T, wrapmode);CHECKGLERROR
699         if (gltexturetypedimensions[texturetype] >= 3)
700         {
701                 qglTexParameteri(textureenum, GL_TEXTURE_WRAP_R, wrapmode);CHECKGLERROR
702         }
703
704         CHECKGLERROR
705         if (flags & TEXF_FORCENEAREST)
706         {
707                 if (flags & TEXF_MIPMAP)
708                 {
709                         qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, GL_NEAREST_MIPMAP_NEAREST);CHECKGLERROR
710                 }
711                 else
712                 {
713                         qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, GL_NEAREST);CHECKGLERROR
714                 }
715                 qglTexParameteri(textureenum, GL_TEXTURE_MAG_FILTER, GL_NEAREST);CHECKGLERROR
716         }
717         else if (flags & TEXF_FORCELINEAR)
718         {
719                 if (flags & TEXF_MIPMAP)
720                 {
721                         if (gl_filter_min == GL_NEAREST_MIPMAP_LINEAR || gl_filter_min == GL_LINEAR_MIPMAP_LINEAR)
722                         {
723                                 qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);CHECKGLERROR
724                         }
725                         else
726                         {
727                                 qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_NEAREST);CHECKGLERROR
728                         }
729                 }
730                 else
731                 {
732                         qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, GL_LINEAR);CHECKGLERROR
733                 }
734                 qglTexParameteri(textureenum, GL_TEXTURE_MAG_FILTER, GL_LINEAR);CHECKGLERROR
735         }
736         else
737         {
738                 if (flags & TEXF_MIPMAP)
739                 {
740                         qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, gl_filter_min);CHECKGLERROR
741                 }
742                 else
743                 {
744                         qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, gl_filter_mag);CHECKGLERROR
745                 }
746                 qglTexParameteri(textureenum, GL_TEXTURE_MAG_FILTER, gl_filter_mag);CHECKGLERROR
747         }
748
749         if (textype == TEXTYPE_SHADOWMAP)
750         {
751                 if (gl_support_arb_shadow)
752                 {
753                         if (flags & TEXF_COMPARE)
754                         {
755                                 qglTexParameteri(textureenum, GL_TEXTURE_COMPARE_MODE_ARB, GL_COMPARE_R_TO_TEXTURE_ARB);CHECKGLERROR
756                         }
757                         else
758                         {
759                                 qglTexParameteri(textureenum, GL_TEXTURE_COMPARE_MODE_ARB, GL_NONE);CHECKGLERROR
760                         }
761                         qglTexParameteri(textureenum, GL_TEXTURE_COMPARE_FUNC_ARB, GL_LEQUAL);CHECKGLERROR
762                 }
763                 qglTexParameteri(textureenum, GL_DEPTH_TEXTURE_MODE_ARB, GL_LUMINANCE);CHECKGLERROR
764         }
765
766         CHECKGLERROR
767 }
768
769 static void R_Upload(gltexture_t *glt, const unsigned char *data, int fragx, int fragy, int fragz, int fragwidth, int fragheight, int fragdepth)
770 {
771         int i, mip, width, height, depth;
772         GLint oldbindtexnum;
773         const unsigned char *prevbuffer;
774         prevbuffer = data;
775
776         CHECKGLERROR
777
778         // we need to restore the texture binding after finishing the upload
779         qglGetIntegerv(gltexturetypebindingenums[glt->texturetype], &oldbindtexnum);CHECKGLERROR
780         qglBindTexture(gltexturetypeenums[glt->texturetype], glt->texnum);CHECKGLERROR
781
782         // these are rounded up versions of the size to do better resampling
783         if (gl_support_arb_texture_non_power_of_two || glt->texturetype == GLTEXTURETYPE_RECTANGLE)
784         {
785                 width = glt->inputwidth;
786                 height = glt->inputheight;
787                 depth = glt->inputdepth;
788         }
789         else
790         {
791                 for (width  = 1;width  < glt->inputwidth ;width  <<= 1);
792                 for (height = 1;height < glt->inputheight;height <<= 1);
793                 for (depth  = 1;depth  < glt->inputdepth ;depth  <<= 1);
794         }
795
796         R_MakeResizeBufferBigger(width * height * depth * glt->sides * glt->bytesperpixel);
797         R_MakeResizeBufferBigger(fragwidth * fragheight * fragdepth * glt->sides * glt->bytesperpixel);
798
799         if (prevbuffer == NULL)
800         {
801                 memset(resizebuffer, 0, fragwidth * fragheight * fragdepth * glt->bytesperpixel);
802                 prevbuffer = resizebuffer;
803         }
804         else if (glt->textype->textype == TEXTYPE_PALETTE)
805         {
806                 // promote paletted to BGRA, so we only have to worry about BGRA in the rest of this code
807                 Image_Copy8bitBGRA(prevbuffer, colorconvertbuffer, fragwidth * fragheight * fragdepth * glt->sides, glt->palette);
808                 prevbuffer = colorconvertbuffer;
809         }
810
811         if ((glt->flags & (TEXF_MIPMAP | TEXF_PICMIP | GLTEXF_UPLOAD)) == 0 && glt->inputwidth == glt->tilewidth && glt->inputheight == glt->tileheight && glt->inputdepth == glt->tiledepth)
812         {
813                 // update a portion of the image
814                 switch(glt->texturetype)
815                 {
816                 case GLTEXTURETYPE_1D:
817                         qglTexSubImage1D(GL_TEXTURE_1D, 0, fragx, fragwidth, glt->glformat, glt->gltype, prevbuffer);CHECKGLERROR
818                         break;
819                 case GLTEXTURETYPE_2D:
820                         qglTexSubImage2D(GL_TEXTURE_2D, 0, fragx, fragy, fragwidth, fragheight, glt->glformat, glt->gltype, prevbuffer);CHECKGLERROR
821                         break;
822                 case GLTEXTURETYPE_3D:
823                         qglTexSubImage3D(GL_TEXTURE_3D, 0, fragx, fragy, fragz, fragwidth, fragheight, fragdepth, glt->glformat, glt->gltype, prevbuffer);CHECKGLERROR
824                         break;
825                 default:
826                         Host_Error("R_Upload: partial update of type other than 1D, 2D, or 3D");
827                         break;
828                 }
829         }
830         else
831         {
832                 if (fragx || fragy || fragz || glt->inputwidth != fragwidth || glt->inputheight != fragheight || glt->inputdepth != fragdepth)
833                         Host_Error("R_Upload: partial update not allowed on initial upload or in combination with PICMIP or MIPMAP\n");
834
835                 // upload the image for the first time
836                 glt->flags &= ~GLTEXF_UPLOAD;
837
838                 // cubemaps contain multiple images and thus get processed a bit differently
839                 if (glt->texturetype != GLTEXTURETYPE_CUBEMAP)
840                 {
841                         if (glt->inputwidth != width || glt->inputheight != height || glt->inputdepth != depth)
842                         {
843                                 Image_Resample32(prevbuffer, glt->inputwidth, glt->inputheight, glt->inputdepth, resizebuffer, width, height, depth, r_lerpimages.integer);
844                                 prevbuffer = resizebuffer;
845                         }
846                         // picmip/max_size
847                         while (width > glt->tilewidth || height > glt->tileheight || depth > glt->tiledepth)
848                         {
849                                 Image_MipReduce32(prevbuffer, resizebuffer, &width, &height, &depth, glt->tilewidth, glt->tileheight, glt->tiledepth);
850                                 prevbuffer = resizebuffer;
851                         }
852                 }
853                 mip = 0;
854                 if (gl_support_texture_compression)
855                 {
856                         if (gl_texturecompression.integer >= 2)
857                                 qglHint(GL_TEXTURE_COMPRESSION_HINT_ARB, GL_NICEST);
858                         else
859                                 qglHint(GL_TEXTURE_COMPRESSION_HINT_ARB, GL_FASTEST);
860                         CHECKGLERROR
861                 }
862                 switch(glt->texturetype)
863                 {
864                 case GLTEXTURETYPE_1D:
865                         qglTexImage1D(GL_TEXTURE_1D, mip++, glt->glinternalformat, width, 0, glt->glformat, glt->gltype, prevbuffer);CHECKGLERROR
866                         if (glt->flags & TEXF_MIPMAP)
867                         {
868                                 while (width > 1 || height > 1 || depth > 1)
869                                 {
870                                         Image_MipReduce32(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1);
871                                         prevbuffer = resizebuffer;
872                                         qglTexImage1D(GL_TEXTURE_1D, mip++, glt->glinternalformat, width, 0, glt->glformat, glt->gltype, prevbuffer);CHECKGLERROR
873                                 }
874                         }
875                         break;
876                 case GLTEXTURETYPE_2D:
877                         qglTexImage2D(GL_TEXTURE_2D, mip++, glt->glinternalformat, width, height, 0, glt->glformat, glt->gltype, prevbuffer);CHECKGLERROR
878                         if (glt->flags & TEXF_MIPMAP)
879                         {
880                                 while (width > 1 || height > 1 || depth > 1)
881                                 {
882                                         Image_MipReduce32(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1);
883                                         prevbuffer = resizebuffer;
884                                         qglTexImage2D(GL_TEXTURE_2D, mip++, glt->glinternalformat, width, height, 0, glt->glformat, glt->gltype, prevbuffer);CHECKGLERROR
885                                 }
886                         }
887                         break;
888                 case GLTEXTURETYPE_3D:
889                         qglTexImage3D(GL_TEXTURE_3D, mip++, glt->glinternalformat, width, height, depth, 0, glt->glformat, glt->gltype, prevbuffer);CHECKGLERROR
890                         if (glt->flags & TEXF_MIPMAP)
891                         {
892                                 while (width > 1 || height > 1 || depth > 1)
893                                 {
894                                         Image_MipReduce32(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1);
895                                         prevbuffer = resizebuffer;
896                                         qglTexImage3D(GL_TEXTURE_3D, mip++, glt->glinternalformat, width, height, depth, 0, glt->glformat, glt->gltype, prevbuffer);CHECKGLERROR
897                                 }
898                         }
899                         break;
900                 case GLTEXTURETYPE_CUBEMAP:
901                         // convert and upload each side in turn,
902                         // from a continuous block of input texels
903                         texturebuffer = (unsigned char *)prevbuffer;
904                         for (i = 0;i < 6;i++)
905                         {
906                                 prevbuffer = texturebuffer;
907                                 texturebuffer += glt->inputwidth * glt->inputheight * glt->inputdepth * glt->textype->inputbytesperpixel;
908                                 if (glt->inputwidth != width || glt->inputheight != height || glt->inputdepth != depth)
909                                 {
910                                         Image_Resample32(prevbuffer, glt->inputwidth, glt->inputheight, glt->inputdepth, resizebuffer, width, height, depth, r_lerpimages.integer);
911                                         prevbuffer = resizebuffer;
912                                 }
913                                 // picmip/max_size
914                                 while (width > glt->tilewidth || height > glt->tileheight || depth > glt->tiledepth)
915                                 {
916                                         Image_MipReduce32(prevbuffer, resizebuffer, &width, &height, &depth, glt->tilewidth, glt->tileheight, glt->tiledepth);
917                                         prevbuffer = resizebuffer;
918                                 }
919                                 mip = 0;
920                                 qglTexImage2D(cubemapside[i], mip++, glt->glinternalformat, width, height, 0, glt->glformat, glt->gltype, prevbuffer);CHECKGLERROR
921                                 if (glt->flags & TEXF_MIPMAP)
922                                 {
923                                         while (width > 1 || height > 1 || depth > 1)
924                                         {
925                                                 Image_MipReduce32(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1);
926                                                 prevbuffer = resizebuffer;
927                                                 qglTexImage2D(cubemapside[i], mip++, glt->glinternalformat, width, height, 0, glt->glformat, glt->gltype, prevbuffer);CHECKGLERROR
928                                         }
929                                 }
930                         }
931                         break;
932                 case GLTEXTURETYPE_RECTANGLE:
933                         qglTexImage2D(GL_TEXTURE_RECTANGLE_ARB, mip++, glt->glinternalformat, width, height, 0, glt->glformat, glt->gltype, NULL);CHECKGLERROR
934                         break;
935                 }
936                 GL_SetupTextureParameters(glt->flags, glt->textype->textype, glt->texturetype);
937         }
938         qglBindTexture(gltexturetypeenums[glt->texturetype], oldbindtexnum);CHECKGLERROR
939 }
940
941 int R_RealGetTexture(rtexture_t *rt)
942 {
943         if (rt)
944         {
945                 gltexture_t *glt;
946                 glt = (gltexture_t *)rt;
947                 if (glt->flags & GLTEXF_DYNAMIC)
948                         R_UpdateDynamicTexture(glt);
949                 if (glt->flags & GLTEXF_UPLOAD)
950                 {
951                         CHECKGLERROR
952                         qglGenTextures(1, (GLuint *)&glt->texnum);CHECKGLERROR
953                         R_Upload(glt, glt->inputtexels, 0, 0, 0, glt->inputwidth, glt->inputheight, glt->inputdepth);
954                         if (glt->inputtexels)
955                         {
956                                 Mem_Free(glt->inputtexels);
957                                 glt->inputtexels = NULL;
958                                 glt->flags |= GLTEXF_DESTROYED;
959                         }
960                         else if (glt->flags & GLTEXF_DESTROYED)
961                                 Con_Printf("R_GetTexture: Texture %s already uploaded and destroyed.  Can not upload original image again.  Uploaded blank texture.\n", glt->identifier);
962                 }
963
964                 return glt->texnum;
965         }
966         else
967                 return 0;
968 }
969
970 static rtexture_t *R_SetupTexture(rtexturepool_t *rtexturepool, const char *identifier, int width, int height, int depth, int sides, int flags, textype_t textype, int texturetype, const unsigned char *data, const unsigned int *palette)
971 {
972         int i, size;
973         gltexture_t *glt;
974         gltexturepool_t *pool = (gltexturepool_t *)rtexturepool;
975         textypeinfo_t *texinfo;
976         int precache;
977
978         if (cls.state == ca_dedicated)
979                 return NULL;
980
981         if (texturetype == GLTEXTURETYPE_RECTANGLE && !gl_texturerectangle)
982         {
983                 Con_Printf ("R_LoadTexture: rectangle texture not supported by driver\n");
984                 return NULL;
985         }
986         if (texturetype == GLTEXTURETYPE_CUBEMAP && !gl_texturecubemap)
987         {
988                 Con_Printf ("R_LoadTexture: cubemap texture not supported by driver\n");
989                 return NULL;
990         }
991         if (texturetype == GLTEXTURETYPE_3D && !gl_texture3d)
992         {
993                 Con_Printf ("R_LoadTexture: 3d texture not supported by driver\n");
994                 return NULL;
995         }
996
997         texinfo = R_GetTexTypeInfo(textype, flags);
998         size = width * height * depth * sides * texinfo->inputbytesperpixel;
999         if (size < 1)
1000         {
1001                 Con_Printf ("R_LoadTexture: bogus texture size (%dx%dx%dx%dbppx%dsides = %d bytes)\n", width, height, depth, texinfo->inputbytesperpixel * 8, sides, size);
1002                 return NULL;
1003         }
1004
1005         // clear the alpha flag if the texture has no transparent pixels
1006         switch(textype)
1007         {
1008         case TEXTYPE_PALETTE:
1009                 if (flags & TEXF_ALPHA)
1010                 {
1011                         flags &= ~TEXF_ALPHA;
1012                         if (data)
1013                         {
1014                                 for (i = 0;i < size;i++)
1015                                 {
1016                                         if (((unsigned char *)&palette[data[i]])[3] < 255)
1017                                         {
1018                                                 flags |= TEXF_ALPHA;
1019                                                 break;
1020                                         }
1021                                 }
1022                         }
1023                 }
1024                 break;
1025         case TEXTYPE_RGBA:
1026         case TEXTYPE_BGRA:
1027                 if (flags & TEXF_ALPHA)
1028                 {
1029                         flags &= ~TEXF_ALPHA;
1030                         if (data)
1031                         {
1032                                 for (i = 3;i < size;i += 4)
1033                                 {
1034                                         if (data[i] < 255)
1035                                         {
1036                                                 flags |= TEXF_ALPHA;
1037                                                 break;
1038                                         }
1039                                 }
1040                         }
1041                 }
1042                 break;
1043         case TEXTYPE_SHADOWMAP:
1044                 break;
1045         default:
1046                 Host_Error("R_LoadTexture: unknown texture type");
1047         }
1048
1049         glt = (gltexture_t *)Mem_Alloc(texturemempool, sizeof(gltexture_t));
1050         if (identifier)
1051                 strlcpy (glt->identifier, identifier, sizeof(glt->identifier));
1052         glt->pool = pool;
1053         glt->chain = pool->gltchain;
1054         pool->gltchain = glt;
1055         glt->inputwidth = width;
1056         glt->inputheight = height;
1057         glt->inputdepth = depth;
1058         glt->flags = flags | GLTEXF_UPLOAD;
1059         glt->textype = texinfo;
1060         glt->texturetype = texturetype;
1061         glt->inputdatasize = size;
1062         glt->palette = palette;
1063         glt->glinternalformat = texinfo->glinternalformat;
1064         glt->glformat = texinfo->glformat;
1065         glt->gltype = texinfo->gltype;
1066         glt->bytesperpixel = texinfo->internalbytesperpixel;
1067         glt->sides = glt->texturetype == GLTEXTURETYPE_CUBEMAP ? 6 : 1;
1068         glt->texnum = 0;
1069         // init the dynamic texture attributes, too [11/22/2007 Black]
1070         glt->dirtytexnum = 0;
1071         glt->updatecallback = NULL;
1072         glt->updatacallback_data = NULL;
1073
1074         GL_Texture_CalcImageSize(glt->texturetype, glt->flags, glt->inputwidth, glt->inputheight, glt->inputdepth, &glt->tilewidth, &glt->tileheight, &glt->tiledepth);
1075
1076         precache = false;
1077         if (glt->flags & TEXF_ALWAYSPRECACHE)
1078                 precache = true;
1079         else if (r_precachetextures.integer >= 2)
1080                 precache = true;
1081         else if (r_precachetextures.integer >= 1)
1082                 if (glt->flags & TEXF_PRECACHE)
1083                         precache = true;
1084
1085         if (precache)
1086         {
1087                 // immediate upload (most common case)
1088                 // data may be NULL (blank texture for dynamic rendering)
1089                 CHECKGLERROR
1090                 qglGenTextures(1, (GLuint *)&glt->texnum);CHECKGLERROR
1091                 R_Upload(glt, data, 0, 0, 0, glt->inputwidth, glt->inputheight, glt->inputdepth);
1092         }
1093         else if (data)
1094         {
1095                 // deferred texture upload (menu graphics)
1096                 // optimize first if possible
1097                 if ((textype == TEXTYPE_BGRA || textype == TEXTYPE_RGBA) && glt->inputwidth * glt->inputheight * glt->inputdepth > glt->tilewidth * glt->tileheight * glt->tiledepth)
1098                 {
1099                         glt->inputtexels = (unsigned char *)Mem_Alloc(texturemempool, glt->tilewidth*glt->tileheight*glt->tiledepth*glt->sides*glt->bytesperpixel);
1100                         Image_Resample32(data, glt->inputwidth, glt->inputheight, glt->inputdepth, glt->inputtexels, glt->tilewidth, glt->tileheight, glt->tiledepth, r_lerpimages.integer);
1101                         // change texture size accordingly
1102                         glt->inputwidth = glt->tilewidth;
1103                         glt->inputheight = glt->tileheight;
1104                         glt->inputdepth = glt->tiledepth;
1105                         GL_Texture_CalcImageSize(glt->texturetype, glt->flags, glt->inputwidth, glt->inputheight, glt->inputdepth, &glt->tilewidth, &glt->tileheight, &glt->tiledepth);
1106                 }
1107                 else
1108                 {
1109                         glt->inputtexels = (unsigned char *)Mem_Alloc(texturemempool, size);
1110                         memcpy(glt->inputtexels, data, size);
1111                 }
1112         }
1113
1114         // texture converting and uploading can take a while, so make sure we're sending keepalives
1115         CL_KeepaliveMessage(false);
1116
1117         return (rtexture_t *)glt;
1118 }
1119
1120 rtexture_t *R_LoadTexture1D(rtexturepool_t *rtexturepool, const char *identifier, int width, const unsigned char *data, textype_t textype, int flags, const unsigned int *palette)
1121 {
1122         return R_SetupTexture(rtexturepool, identifier, width, 1, 1, 1, flags, textype, GLTEXTURETYPE_1D, data, palette);
1123 }
1124
1125 rtexture_t *R_LoadTexture2D(rtexturepool_t *rtexturepool, const char *identifier, int width, int height, const unsigned char *data, textype_t textype, int flags, const unsigned int *palette)
1126 {
1127         return R_SetupTexture(rtexturepool, identifier, width, height, 1, 1, flags, textype, GLTEXTURETYPE_2D, data, palette);
1128 }
1129
1130 rtexture_t *R_LoadTexture3D(rtexturepool_t *rtexturepool, const char *identifier, int width, int height, int depth, const unsigned char *data, textype_t textype, int flags, const unsigned int *palette)
1131 {
1132         return R_SetupTexture(rtexturepool, identifier, width, height, depth, 1, flags, textype, GLTEXTURETYPE_3D, data, palette);
1133 }
1134
1135 rtexture_t *R_LoadTextureCubeMap(rtexturepool_t *rtexturepool, const char *identifier, int width, const unsigned char *data, textype_t textype, int flags, const unsigned int *palette)
1136 {
1137         return R_SetupTexture(rtexturepool, identifier, width, width, 1, 6, flags, textype, GLTEXTURETYPE_CUBEMAP, data, palette);
1138 }
1139
1140 static int R_ShadowMapTextureFlags(int precision, qboolean filter)
1141 {
1142         int flags = TEXF_ALWAYSPRECACHE | TEXF_CLAMP;
1143         if (filter)
1144                 flags |= TEXF_FORCELINEAR | TEXF_COMPARE;
1145         else
1146                 flags |= TEXF_FORCENEAREST;
1147         if (precision <= 16)
1148                 flags |= TEXF_LOWPRECISION;
1149         return flags;
1150 }
1151
1152 rtexture_t *R_LoadTextureShadowMapRectangle(rtexturepool_t *rtexturepool, const char *identifier, int width, int height, int precision, qboolean filter)
1153 {
1154         return R_SetupTexture(rtexturepool, identifier, width, height, 1, 1, R_ShadowMapTextureFlags(precision, filter), TEXTYPE_SHADOWMAP, GLTEXTURETYPE_RECTANGLE, NULL, NULL);
1155 }
1156
1157 rtexture_t *R_LoadTextureShadowMap2D(rtexturepool_t *rtexturepool, const char *identifier, int width, int height, int precision, qboolean filter)
1158 {
1159         return R_SetupTexture(rtexturepool, identifier, width, height, 1, 1, R_ShadowMapTextureFlags(precision, filter), TEXTYPE_SHADOWMAP, GLTEXTURETYPE_2D, NULL, NULL);
1160 }
1161
1162 rtexture_t *R_LoadTextureShadowMapCube(rtexturepool_t *rtexturepool, const char *identifier, int width, int precision, qboolean filter)
1163 {
1164     return R_SetupTexture(rtexturepool, identifier, width, width, 1, 6, R_ShadowMapTextureFlags(precision, filter), TEXTYPE_SHADOWMAP, GLTEXTURETYPE_CUBEMAP, NULL, NULL);
1165 }
1166
1167 int R_TextureHasAlpha(rtexture_t *rt)
1168 {
1169         return rt ? (((gltexture_t *)rt)->flags & TEXF_ALPHA) != 0 : false;
1170 }
1171
1172 int R_TextureWidth(rtexture_t *rt)
1173 {
1174         return rt ? ((gltexture_t *)rt)->inputwidth : 0;
1175 }
1176
1177 int R_TextureHeight(rtexture_t *rt)
1178 {
1179         return rt ? ((gltexture_t *)rt)->inputheight : 0;
1180 }
1181
1182 void R_UpdateTexture(rtexture_t *rt, const unsigned char *data, int x, int y, int width, int height)
1183 {
1184         gltexture_t *glt;
1185         if (rt == NULL)
1186                 Host_Error("R_UpdateTexture: no texture supplied");
1187         if (data == NULL)
1188                 Host_Error("R_UpdateTexture: no data supplied");
1189
1190         // we need it to be uploaded before we can update a part of it
1191         R_RealGetTexture(rt);
1192
1193         // update part of the texture
1194         glt = (gltexture_t *)rt;
1195         R_Upload(glt, data, x, y, 0, width, height, 1);
1196 }
1197
1198 void R_ClearTexture (rtexture_t *rt)
1199 {
1200         gltexture_t *glt = (gltexture_t *)rt;
1201
1202         R_Upload( glt, NULL, 0, 0, 0, glt->tilewidth, glt->tileheight, glt->tiledepth );
1203 }