Elric's changes:
[divverent/darkplaces.git] / gl_textures.c
1
2 #include "quakedef.h"
3 #include "image.h"
4 #include "jpeg.h"
5
6 cvar_t  r_max_size = {CVAR_SAVE, "r_max_size", "2048"};
7 cvar_t  r_max_scrapsize = {CVAR_SAVE, "r_max_scrapsize", "256"};
8 cvar_t  r_picmip = {CVAR_SAVE, "r_picmip", "0"};
9 cvar_t  r_lerpimages = {CVAR_SAVE, "r_lerpimages", "1"};
10 cvar_t  r_precachetextures = {CVAR_SAVE, "r_precachetextures", "1"};
11
12 int             gl_filter_min = GL_LINEAR_MIPMAP_LINEAR;
13 int             gl_filter_mag = GL_LINEAR;
14
15
16 static mempool_t *texturemempool;
17 static mempool_t *texturedatamempool;
18 static mempool_t *textureprocessingmempool;
19
20 // note: this must not conflict with TEXF_ flags in r_textures.h
21 // cleared when a texture is uploaded
22 #define GLTEXF_UPLOAD 0x00010000
23 // bitmask for mismatch checking
24 #define GLTEXF_IMPORTANTBITS (0)
25 // set when image is uploaded and freed
26 #define GLTEXF_DESTROYED 0x00040000
27
28 // size of images which hold fragment textures, ignores picmip and max_size
29 static int block_size;
30
31 typedef struct
32 {
33         int textype;
34         int inputbytesperpixel;
35         int internalbytesperpixel;
36         int glformat;
37         int glinternalformat;
38 }
39 textypeinfo_t;
40
41 static textypeinfo_t textype_palette       = {TEXTYPE_PALETTE, 1, 4, GL_RGBA, 3};
42 static textypeinfo_t textype_rgb           = {TEXTYPE_RGB    , 3, 3, GL_RGB , 3};
43 static textypeinfo_t textype_rgba          = {TEXTYPE_RGBA   , 4, 4, GL_RGBA, 3};
44 static textypeinfo_t textype_palette_alpha = {TEXTYPE_PALETTE, 1, 4, GL_RGBA, 4};
45 static textypeinfo_t textype_rgba_alpha    = {TEXTYPE_RGBA   , 4, 4, GL_RGBA, 4};
46
47 // a tiling texture (most common type)
48 #define GLIMAGETYPE_TILE 0
49 // a fragments texture (contains one or more fragment textures)
50 #define GLIMAGETYPE_FRAGMENTS 1
51
52 #define GLTEXTURETYPE_1D 0
53 #define GLTEXTURETYPE_2D 1
54 #define GLTEXTURETYPE_3D 2
55 #define GLTEXTURETYPE_CUBEMAP 3
56
57 static int gltexturetypeenums[4] = {GL_TEXTURE_1D, GL_TEXTURE_2D, GL_TEXTURE_3D, GL_TEXTURE_CUBE_MAP_ARB};
58 static int gltexturetypedimensions[4] = {1, 2, 3, 2};
59 static int cubemapside[6] =
60 {
61         GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB,
62         GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB,
63         GL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB,
64         GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB,
65         GL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB,
66         GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB
67 };
68
69 // a gltextureimage can have one (or more if fragments) gltextures inside
70 typedef struct gltextureimage_s
71 {
72         struct gltextureimage_s *imagechain;
73         int texturecount;
74         int type; // one of the GLIMAGETYPE_ values
75         int texturetype; // one of the GLTEXTURETYPE_ values
76         int sides; // 1 or 6 depending on texturetype
77         int texnum; // GL texture slot number
78         int width, height, depth; // 3D texture support
79         int bytesperpixel; // bytes per pixel
80         int glformat; // GL_RGB or GL_RGBA
81         int glinternalformat; // 3 or 4
82         int flags;
83         short *blockallocation; // fragment allocation (2D only)
84 }
85 gltextureimage_t;
86
87 typedef struct gltexture_s
88 {
89         // this field is exposed to the R_GetTexture macro, for speed reasons
90         // (must be identical in rtexture_t)
91         int texnum; // GL texture slot number
92
93         // pointer to texturepool (check this to see if the texture is allocated)
94         struct gltexturepool_s *pool;
95         // pointer to next texture in texturepool chain
96         struct gltexture_s *chain;
97         // pointer into gltextureimage array
98         gltextureimage_t *image;
99         // name of the texture (this might be removed someday), no duplicates
100         char *identifier;
101         // location in the image, and size
102         int x, y, z, width, height, depth;
103         // copy of the original texture(s) supplied to the upload function, for
104         // delayed uploads (non-precached)
105         qbyte *inputtexels;
106         // original data size in *inputtexels
107         int inputdatasize;
108         // flags supplied to the LoadTexture function
109         // (might be altered to remove TEXF_ALPHA), and GLTEXF_ private flags
110         int flags;
111         // pointer to one of the textype_ structs
112         textypeinfo_t *textype;
113         // one of the GLTEXTURETYPE_ values
114         int texturetype;
115         // palette if the texture is TEXTYPE_PALETTE
116         const unsigned int *palette;
117 }
118 gltexture_t;
119
120 #define TEXTUREPOOL_SENTINEL 0xC0DEDBAD
121
122 typedef struct gltexturepool_s
123 {
124         unsigned int sentinel;
125         struct gltextureimage_s *imagechain;
126         struct gltexture_s *gltchain;
127         struct gltexturepool_s *next;
128 }
129 gltexturepool_t;
130
131 static gltexturepool_t *gltexturepoolchain = NULL;
132
133 static qbyte *resizebuffer = NULL, *colorconvertbuffer;
134 static int resizebuffersize = 0;
135 static qbyte *texturebuffer;
136 static int texturebuffersize = 0;
137
138 static int realmaxsize = 0;
139
140 static textypeinfo_t *R_GetTexTypeInfo(int textype, int flags)
141 {
142         if (flags & TEXF_ALPHA)
143         {
144                 switch(textype)
145                 {
146                 case TEXTYPE_PALETTE:
147                         return &textype_palette_alpha;
148                 case TEXTYPE_RGB:
149                         Host_Error("R_GetTexTypeInfo: RGB format has no alpha, TEXF_ALPHA not allowed\n");
150                         return NULL;
151                 case TEXTYPE_RGBA:
152                         return &textype_rgba_alpha;
153                 default:
154                         Host_Error("R_GetTexTypeInfo: unknown texture format\n");
155                         return NULL;
156                 }
157         }
158         else
159         {
160                 switch(textype)
161                 {
162                 case TEXTYPE_PALETTE:
163                         return &textype_palette;
164                 case TEXTYPE_RGB:
165                         return &textype_rgb;
166                 case TEXTYPE_RGBA:
167                         return &textype_rgba;
168                 default:
169                         Host_Error("R_GetTexTypeInfo: unknown texture format\n");
170                         return NULL;
171                 }
172         }
173 }
174
175 static void R_UploadTexture(gltexture_t *t);
176
177 static void R_PrecacheTexture(gltexture_t *glt)
178 {
179         int precache;
180         precache = false;
181         if (glt->flags & TEXF_ALWAYSPRECACHE)
182                 precache = true;
183         else if (r_precachetextures.integer >= 2)
184                 precache = true;
185         else if (r_precachetextures.integer >= 1)
186                 if (glt->flags & TEXF_PRECACHE)
187                         precache = true;
188
189         if (precache)
190                 R_UploadTexture(glt);
191 }
192
193 int R_RealGetTexture(rtexture_t *rt)
194 {
195         if (rt)
196         {
197                 gltexture_t *glt;
198                 glt = (gltexture_t *)rt;
199                 if (glt->flags & GLTEXF_UPLOAD)
200                         R_UploadTexture(glt);
201                 glt->texnum = glt->image->texnum;
202                 return glt->image->texnum;
203         }
204         else
205                 return 0;
206 }
207
208 void R_FreeTexture(rtexture_t *rt)
209 {
210         gltexture_t *glt, **gltpointer;
211         gltextureimage_t *image, **gltimagepointer;
212
213         glt = (gltexture_t *)rt;
214         if (glt == NULL)
215                 Host_Error("R_FreeTexture: texture == NULL\n");
216
217         for (gltpointer = &glt->pool->gltchain;*gltpointer && *gltpointer != glt;gltpointer = &(*gltpointer)->chain);
218         if (*gltpointer == glt)
219                 *gltpointer = glt->chain;
220         else
221                 Host_Error("R_FreeTexture: texture \"%s\" not linked in pool\n", glt->identifier);
222
223         // note: if freeing a fragment texture, this will not make the claimed
224         // space available for new textures unless all other fragments in the
225         // image are also freed
226         if (glt->image)
227         {
228                 image = glt->image;
229                 image->texturecount--;
230                 if (image->texturecount < 1)
231                 {
232                         for (gltimagepointer = &glt->pool->imagechain;*gltimagepointer && *gltimagepointer != image;gltimagepointer = &(*gltimagepointer)->imagechain);
233                         if (*gltimagepointer == image)
234                                 *gltimagepointer = image->imagechain;
235                         else
236                                 Host_Error("R_FreeTexture: image not linked in pool\n");
237                         if (image->texnum)
238                                 qglDeleteTextures(1, &image->texnum);
239                         if (image->blockallocation)
240                                 Mem_Free(image->blockallocation);
241                         Mem_Free(image);
242                 }
243         }
244
245         if (glt->identifier)
246                 Mem_Free(glt->identifier);
247         if (glt->inputtexels)
248                 Mem_Free(glt->inputtexels);
249         Mem_Free(glt);
250 }
251
252 /*
253 static gltexture_t *R_FindTexture (gltexturepool_t *pool, char *identifier)
254 {
255         gltexture_t     *glt;
256
257         if (!identifier)
258                 return NULL;
259
260         for (glt = pool->gltchain;glt;glt = glt->chain)
261                 if (glt->identifier && !strcmp (identifier, glt->identifier))
262                         return glt;
263
264         return NULL;
265 }
266 */
267
268 rtexturepool_t *R_AllocTexturePool(void)
269 {
270         gltexturepool_t *pool;
271         if (texturemempool == NULL)
272                 return NULL;
273         pool = Mem_Alloc(texturemempool, sizeof(gltexturepool_t));
274         if (pool == NULL)
275                 return NULL;
276         pool->next = gltexturepoolchain;
277         gltexturepoolchain = pool;
278         pool->sentinel = TEXTUREPOOL_SENTINEL;
279         return (rtexturepool_t *)pool;
280 }
281
282 void R_FreeTexturePool(rtexturepool_t **rtexturepool)
283 {
284         gltexturepool_t *pool, **poolpointer;
285         if (rtexturepool == NULL)
286                 return;
287         if (*rtexturepool == NULL)
288                 return;
289         pool = (gltexturepool_t *)(*rtexturepool);
290         *rtexturepool = NULL;
291         if (pool->sentinel != TEXTUREPOOL_SENTINEL)
292                 Host_Error("R_FreeTexturePool: pool already freed\n");
293         for (poolpointer = &gltexturepoolchain;*poolpointer && *poolpointer != pool;poolpointer = &(*poolpointer)->next);
294         if (*poolpointer == pool)
295                 *poolpointer = pool->next;
296         else
297                 Host_Error("R_FreeTexturePool: pool not linked\n");
298         while (pool->gltchain)
299                 R_FreeTexture((rtexture_t *)pool->gltchain);
300         if (pool->imagechain)
301                 Sys_Error("R_FreeTexturePool: not all images freed\n");
302         Mem_Free(pool);
303 }
304
305
306 typedef struct
307 {
308         char *name;
309         int minification, magnification;
310 }
311 glmode_t;
312
313 static glmode_t modes[] =
314 {
315         {"GL_NEAREST", GL_NEAREST, GL_NEAREST},
316         {"GL_LINEAR", GL_LINEAR, GL_LINEAR},
317         {"GL_NEAREST_MIPMAP_NEAREST", GL_NEAREST_MIPMAP_NEAREST, GL_NEAREST},
318         {"GL_LINEAR_MIPMAP_NEAREST", GL_LINEAR_MIPMAP_NEAREST, GL_LINEAR},
319         {"GL_NEAREST_MIPMAP_LINEAR", GL_NEAREST_MIPMAP_LINEAR, GL_NEAREST},
320         {"GL_LINEAR_MIPMAP_LINEAR", GL_LINEAR_MIPMAP_LINEAR, GL_LINEAR}
321 };
322
323 extern int gl_backend_rebindtextures;
324
325 static void GL_TextureMode_f (void)
326 {
327         int i;
328         gltextureimage_t *image;
329         gltexturepool_t *pool;
330
331         if (Cmd_Argc() == 1)
332         {
333                 for (i = 0;i < 6;i++)
334                 {
335                         if (gl_filter_min == modes[i].minification)
336                         {
337                                 Con_Printf ("%s\n", modes[i].name);
338                                 return;
339                         }
340                 }
341                 Con_Printf ("current filter is unknown???\n");
342                 return;
343         }
344
345         for (i = 0;i < 6;i++)
346                 if (!Q_strcasecmp (modes[i].name, Cmd_Argv(1) ) )
347                         break;
348         if (i == 6)
349         {
350                 Con_Printf ("bad filter name\n");
351                 return;
352         }
353
354         gl_filter_min = modes[i].minification;
355         gl_filter_mag = modes[i].magnification;
356
357         // change all the existing mipmap texture objects
358         // FIXME: force renderer(/client/something?) restart instead?
359         for (pool = gltexturepoolchain;pool;pool = pool->next)
360         {
361                 for (image = pool->imagechain;image;image = image->imagechain)
362                 {
363                         // only update already uploaded images
364                         if (!(image->flags & GLTEXF_UPLOAD))
365                         {
366                                 qglBindTexture(GL_TEXTURE_2D, image->texnum);
367                                 if (image->flags & TEXF_MIPMAP)
368                                         qglTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl_filter_min);
369                                 else
370                                         qglTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl_filter_mag);
371                                 qglTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, gl_filter_mag);
372                         }
373                 }
374         }
375         gl_backend_rebindtextures = true;
376 }
377
378 static int R_CalcTexelDataSize (gltexture_t *glt)
379 {
380         int width2, height2, depth2, size;
381         if (glt->flags & TEXF_FRAGMENT)
382                 size = glt->width * glt->height * glt->depth;
383         else
384         {
385                 if (r_max_size.integer > realmaxsize)
386                         Cvar_SetValue("r_max_size", realmaxsize);
387                 // calculate final size
388                 for (width2 = 1;width2 < glt->width;width2 <<= 1);
389                 for (height2 = 1;height2 < glt->height;height2 <<= 1);
390                 for (depth2 = 1;depth2 < glt->depth;depth2 <<= 1);
391                 for (width2 >>= r_picmip.integer;width2 > r_max_size.integer;width2 >>= 1);
392                 for (height2 >>= r_picmip.integer;height2 > r_max_size.integer;height2 >>= 1);
393                 for (depth2 >>= r_picmip.integer;depth2 > r_max_size.integer;depth2 >>= 1);
394                 if (width2 < 1) width2 = 1;
395                 if (height2 < 1) height2 = 1;
396                 if (depth2 < 1) depth2 = 1;
397
398                 size = 0;
399                 if (glt->flags & TEXF_MIPMAP)
400                 {
401                         while (width2 > 1 || height2 > 1 || depth2 > 1)
402                         {
403                                 size += width2 * height2 * depth2;
404                                 if (width2 > 1)
405                                         width2 >>= 1;
406                                 if (height2 > 1)
407                                         height2 >>= 1;
408                                 if (depth2 > 1)
409                                         depth2 >>= 1;
410                         }
411                         size++; // count the last 1x1 mipmap
412                 }
413                 else
414                         size = width2 * height2 * depth2;
415         }
416         size *= glt->textype->internalbytesperpixel * glt->image->sides;
417
418         return size;
419 }
420
421 void R_TextureStats_PrintTotal(void)
422 {
423         int glsize, total = 0, totalt = 0, totalp = 0, loaded = 0, loadedt = 0, loadedp = 0;
424         gltexture_t *glt;
425         gltexturepool_t *pool;
426         for (pool = gltexturepoolchain;pool;pool = pool->next)
427         {
428                 for (glt = pool->gltchain;glt;glt = glt->chain)
429                 {
430                         glsize = R_CalcTexelDataSize(glt);
431                         total++;
432                         totalt += glsize;
433                         totalp += glt->inputdatasize;
434                         if (!(glt->flags & GLTEXF_UPLOAD))
435                         {
436                                 loaded++;
437                                 loadedt += glsize;
438                                 loadedp += glt->inputdatasize;
439                         }
440                 }
441         }
442         Con_Printf("total: %i (%.3fMB, %.3fMB original), uploaded %i (%.3fMB, %.3fMB original), upload on demand %i (%.3fMB, %.3fMB original)\n", total, totalt / 1048576.0, totalp / 1048576.0, loaded, loadedt / 1048576.0, loadedp / 1048576.0, total - loaded, (totalt - loadedt) / 1048576.0, (totalp - loadedp) / 1048576.0);
443 }
444
445 static void R_TextureStats_f(void)
446 {
447         int loaded;
448         gltexture_t *glt;
449         gltexturepool_t *pool;
450         Con_Printf("glsize input loaded mip alpha name\n");
451         for (pool = gltexturepoolchain;pool;pool = pool->next)
452         {
453                 for (glt = pool->gltchain;glt;glt = glt->chain)
454                 {
455                         loaded = !(glt->flags & GLTEXF_UPLOAD);
456                         Con_Printf("%c%4i%c%c%4i%c %s %s %s %s\n", loaded ? '[' : ' ', (R_CalcTexelDataSize(glt) + 1023) / 1024, loaded ? ']' : ' ', glt->inputtexels ? '[' : ' ', (glt->inputdatasize + 1023) / 1024, glt->inputtexels ? ']' : ' ', loaded ? "loaded" : "      ", (glt->flags & TEXF_MIPMAP) ? "mip" : "   ", (glt->flags & TEXF_ALPHA) ? "alpha" : "     ", glt->identifier ? glt->identifier : "<unnamed>");
457                 }
458                 Con_Printf("pool %10p\n", pool);
459         }
460         R_TextureStats_PrintTotal();
461 }
462
463 char engineversion[40];
464
465 static void r_textures_start(void)
466 {
467         // deal with size limits of various drivers (3dfx in particular)
468         qglGetIntegerv(GL_MAX_TEXTURE_SIZE, &realmaxsize);
469         CHECKGLERROR
470         // LordHavoc: allow any alignment
471         qglPixelStorei(GL_UNPACK_ALIGNMENT, 1);
472         CHECKGLERROR
473
474         // use the largest scrap texture size we can (not sure if this is really a good idea)
475         for (block_size = 1;block_size < realmaxsize && block_size < r_max_scrapsize.integer;block_size <<= 1);
476
477         texturemempool = Mem_AllocPool("Texture Info");
478         texturedatamempool = Mem_AllocPool("Texture Storage (not yet uploaded)");
479         textureprocessingmempool = Mem_AllocPool("Texture Processing Buffers");
480
481         JPEG_OpenLibrary ();
482 }
483
484 static void r_textures_shutdown(void)
485 {
486         rtexturepool_t *temp;
487
488         JPEG_CloseLibrary ();
489
490         while(gltexturepoolchain)
491         {
492                 temp = (rtexturepool_t *) gltexturepoolchain;
493                 R_FreeTexturePool(&temp);
494         }
495
496         resizebuffersize = 0;
497         texturebuffersize = 0;
498         resizebuffer = NULL;
499         colorconvertbuffer = NULL;
500         texturebuffer = NULL;
501         Mem_FreePool(&texturemempool);
502         Mem_FreePool(&texturedatamempool);
503         Mem_FreePool(&textureprocessingmempool);
504 }
505
506 static void r_textures_newmap(void)
507 {
508 }
509
510 void R_Textures_Init (void)
511 {
512         Cmd_AddCommand("gl_texturemode", &GL_TextureMode_f);
513         Cmd_AddCommand("r_texturestats", R_TextureStats_f);
514         Cvar_RegisterVariable (&r_max_scrapsize);
515         Cvar_RegisterVariable (&r_max_size);
516         Cvar_RegisterVariable (&r_picmip);
517         Cvar_RegisterVariable (&r_lerpimages);
518         Cvar_RegisterVariable (&r_precachetextures);
519
520         R_RegisterModule("R_Textures", r_textures_start, r_textures_shutdown, r_textures_newmap);
521 }
522
523 void R_Textures_Frame (void)
524 {
525         // could do procedural texture animation here, if we keep track of which
526         // textures were accessed this frame...
527
528         // free the resize buffers
529         resizebuffersize = 0;
530         if (resizebuffer)
531         {
532                 Mem_Free(resizebuffer);
533                 resizebuffer = NULL;
534         }
535         if (colorconvertbuffer)
536         {
537                 Mem_Free(colorconvertbuffer);
538                 colorconvertbuffer = NULL;
539         }
540 }
541
542 void R_MakeResizeBufferBigger(int size)
543 {
544         if (resizebuffersize < size)
545         {
546                 resizebuffersize = size;
547                 if (resizebuffer)
548                         Mem_Free(resizebuffer);
549                 if (colorconvertbuffer)
550                         Mem_Free(colorconvertbuffer);
551                 resizebuffer = Mem_Alloc(textureprocessingmempool, resizebuffersize);
552                 colorconvertbuffer = Mem_Alloc(textureprocessingmempool, resizebuffersize);
553                 if (!resizebuffer || !colorconvertbuffer)
554                         Host_Error("R_Upload: out of memory\n");
555         }
556 }
557
558 static void GL_SetupTextureParameters(int flags, int texturetype)
559 {
560         int textureenum = gltexturetypeenums[texturetype];
561         int wrapmode = (flags & TEXF_CLAMP) ? GL_CLAMP : GL_REPEAT;
562
563         CHECKGLERROR
564
565         qglTexParameteri(textureenum, GL_TEXTURE_WRAP_S, wrapmode);
566         qglTexParameteri(textureenum, GL_TEXTURE_WRAP_T, wrapmode);
567         if (gltexturetypedimensions[texturetype] >= 3)
568                 qglTexParameteri(textureenum, GL_TEXTURE_WRAP_R, wrapmode);
569
570         if (flags & TEXF_MIPMAP)
571                 qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, gl_filter_min);
572         else
573                 qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, gl_filter_mag);
574         qglTexParameteri(textureenum, GL_TEXTURE_MAG_FILTER, gl_filter_mag);
575
576         CHECKGLERROR
577 }
578
579 static void R_Upload(gltexture_t *glt, qbyte *data)
580 {
581         int i, mip, width, height, depth, internalformat;
582         qbyte *prevbuffer;
583         prevbuffer = data;
584
585         CHECKGLERROR
586
587         glt->texnum = glt->image->texnum;
588         qglBindTexture(gltexturetypeenums[glt->image->texturetype], glt->image->texnum);
589         CHECKGLERROR
590         glt->flags &= ~GLTEXF_UPLOAD;
591         gl_backend_rebindtextures = true;
592
593         if (glt->flags & TEXF_FRAGMENT)
594         {
595                 if (glt->image->flags & GLTEXF_UPLOAD)
596                 {
597                         glt->image->flags &= ~GLTEXF_UPLOAD;
598                         Con_DPrintf("uploaded new fragments image\n");
599                         R_MakeResizeBufferBigger(glt->image->width * glt->image->height * glt->image->depth * glt->image->bytesperpixel);
600                         memset(resizebuffer, 255, glt->image->width * glt->image->height * glt->image->depth * glt->image->bytesperpixel);
601                         switch(glt->image->texturetype)
602                         {
603                         case GLTEXTURETYPE_1D:
604                                 qglTexImage1D(GL_TEXTURE_1D, 0, glt->image->glinternalformat, glt->image->width, 0, glt->image->glformat, GL_UNSIGNED_BYTE, resizebuffer);
605                                 CHECKGLERROR
606                                 break;
607                         case GLTEXTURETYPE_2D:
608                                 qglTexImage2D(GL_TEXTURE_2D, 0, glt->image->glinternalformat, glt->image->width, glt->image->height, 0, glt->image->glformat, GL_UNSIGNED_BYTE, resizebuffer);
609                                 CHECKGLERROR
610                                 break;
611                         case GLTEXTURETYPE_3D:
612                                 qglTexImage3D(GL_TEXTURE_3D, 0, glt->image->glinternalformat, glt->image->width, glt->image->height, glt->image->depth, 0, glt->image->glformat, GL_UNSIGNED_BYTE, resizebuffer);
613                                 CHECKGLERROR
614                                 break;
615                         default:
616                                 Host_Error("R_Upload: fragment texture of type other than 1D, 2D, or 3D\n");
617                                 break;
618                         }
619                         GL_SetupTextureParameters(glt->image->flags, glt->image->texturetype);
620                 }
621
622                 if (prevbuffer == NULL)
623                 {
624                         R_MakeResizeBufferBigger(glt->image->width * glt->image->height * glt->image->depth * glt->image->bytesperpixel);
625                         memset(resizebuffer, 255, glt->width * glt->height * glt->image->depth * glt->image->bytesperpixel);
626                         prevbuffer = resizebuffer;
627                 }
628                 else if (glt->textype->textype == TEXTYPE_PALETTE)
629                 {
630                         // promote paletted to RGBA, so we only have to worry about RGB and
631                         // RGBA in the rest of this code
632                         R_MakeResizeBufferBigger(glt->image->width * glt->image->height * glt->image->depth * glt->image->sides * glt->image->bytesperpixel);
633                         Image_Copy8bitRGBA(prevbuffer, colorconvertbuffer, glt->width * glt->height * glt->depth, glt->palette);
634                         prevbuffer = colorconvertbuffer;
635                 }
636
637                 switch(glt->image->texturetype)
638                 {
639                 case GLTEXTURETYPE_1D:
640                         qglTexSubImage1D(GL_TEXTURE_1D, 0, glt->x, glt->width, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
641                         CHECKGLERROR
642                         break;
643                 case GLTEXTURETYPE_2D:
644                         qglTexSubImage2D(GL_TEXTURE_2D, 0, glt->x, glt->y, glt->width, glt->height, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
645                         CHECKGLERROR
646                         break;
647                 case GLTEXTURETYPE_3D:
648                         qglTexSubImage3D(GL_TEXTURE_3D, 0, glt->x, glt->y, glt->z, glt->width, glt->height, glt->depth, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
649                         CHECKGLERROR
650                         break;
651                 default:
652                         Host_Error("R_Upload: fragment texture of type other than 1D, 2D, or 3D\n");
653                         break;
654                 }
655                 glt->texnum = glt->image->texnum;
656                 return;
657         }
658
659         glt->image->flags &= ~GLTEXF_UPLOAD;
660
661         // these are rounded up versions of the size to do better resampling
662         for (width  = 1;width  < glt->width ;width  <<= 1);
663         for (height = 1;height < glt->height;height <<= 1);
664         for (depth  = 1;depth  < glt->depth ;depth  <<= 1);
665
666         R_MakeResizeBufferBigger(width * height * depth * glt->image->sides * glt->image->bytesperpixel);
667
668         if (prevbuffer == NULL)
669         {
670                 width = glt->image->width;
671                 height = glt->image->height;
672                 depth = glt->image->depth;
673                 memset(resizebuffer, 255, width * height * depth * glt->image->bytesperpixel);
674                 prevbuffer = resizebuffer;
675         }
676         else
677         {
678                 if (glt->textype->textype == TEXTYPE_PALETTE)
679                 {
680                         // promote paletted to RGBA, so we only have to worry about RGB and
681                         // RGBA in the rest of this code
682                         Image_Copy8bitRGBA(prevbuffer, colorconvertbuffer, glt->width * glt->height * glt->depth * glt->image->sides, glt->palette);
683                         prevbuffer = colorconvertbuffer;
684                 }
685         }
686
687         // 3 and 4 are converted by the driver to it's preferred format for the current display mode
688         internalformat = 3;
689         if (glt->flags & TEXF_ALPHA)
690                 internalformat = 4;
691
692         // cubemaps contain multiple images and thus get processed a bit differently
693         if (glt->image->texturetype != GLTEXTURETYPE_CUBEMAP)
694         {
695                 if (glt->width != width || glt->height != height || glt->depth != depth)
696                 {
697                         Image_Resample(prevbuffer, glt->width, glt->height, glt->depth, resizebuffer, width, height, depth, glt->image->bytesperpixel, r_lerpimages.integer);
698                         prevbuffer = resizebuffer;
699                 }
700                 // picmip/max_size
701                 while (width > glt->image->width || height > glt->image->height || depth > glt->image->depth)
702                 {
703                         Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, glt->image->width, glt->image->height, glt->image->depth, glt->image->bytesperpixel);
704                         prevbuffer = resizebuffer;
705                 }
706         }
707         mip = 0;
708         switch(glt->image->texturetype)
709         {
710         case GLTEXTURETYPE_1D:
711                 qglTexImage1D(GL_TEXTURE_1D, mip++, internalformat, width, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
712                 CHECKGLERROR
713                 if (glt->flags & TEXF_MIPMAP)
714                 {
715                         while (width > 1 || height > 1 || depth > 1)
716                         {
717                                 Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1, glt->image->bytesperpixel);
718                                 prevbuffer = resizebuffer;
719                                 qglTexImage1D(GL_TEXTURE_1D, mip++, internalformat, width, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
720                                 CHECKGLERROR
721                         }
722                 }
723                 break;
724         case GLTEXTURETYPE_2D:
725                 qglTexImage2D(GL_TEXTURE_2D, mip++, internalformat, width, height, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
726                 CHECKGLERROR
727                 if (glt->flags & TEXF_MIPMAP)
728                 {
729                         while (width > 1 || height > 1 || depth > 1)
730                         {
731                                 Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1, glt->image->bytesperpixel);
732                                 prevbuffer = resizebuffer;
733                                 qglTexImage2D(GL_TEXTURE_2D, mip++, internalformat, width, height, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
734                                 CHECKGLERROR
735                         }
736                 }
737                 break;
738         case GLTEXTURETYPE_3D:
739                 qglTexImage3D(GL_TEXTURE_3D, mip++, internalformat, width, height, depth, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
740                 CHECKGLERROR
741                 if (glt->flags & TEXF_MIPMAP)
742                 {
743                         while (width > 1 || height > 1 || depth > 1)
744                         {
745                                 Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1, glt->image->bytesperpixel);
746                                 prevbuffer = resizebuffer;
747                                 qglTexImage3D(GL_TEXTURE_3D, mip++, internalformat, width, height, depth, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
748                                 CHECKGLERROR
749                         }
750                 }
751                 break;
752         case GLTEXTURETYPE_CUBEMAP:
753                 // convert and upload each side in turn,
754                 // from a continuous block of input texels
755                 texturebuffer = prevbuffer;
756                 for (i = 0;i < 6;i++)
757                 {
758                         prevbuffer = texturebuffer;
759                         texturebuffer += width * height * depth * glt->textype->inputbytesperpixel;
760                         if (glt->width != width || glt->height != height || glt->depth != depth)
761                         {
762                                 Image_Resample(prevbuffer, glt->width, glt->height, glt->depth, resizebuffer, width, height, depth, glt->image->bytesperpixel, r_lerpimages.integer);
763                                 prevbuffer = resizebuffer;
764                         }
765                         // picmip/max_size
766                         while (width > glt->image->width || height > glt->image->height || depth > glt->image->depth)
767                         {
768                                 Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, glt->image->width, glt->image->height, glt->image->depth, glt->image->bytesperpixel);
769                                 prevbuffer = resizebuffer;
770                         }
771                         mip = 0;
772                         qglTexImage2D(cubemapside[i], mip++, internalformat, width, height, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
773                         CHECKGLERROR
774                         if (glt->flags & TEXF_MIPMAP)
775                         {
776                                 while (width > 1 || height > 1 || depth > 1)
777                                 {
778                                         Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1, glt->image->bytesperpixel);
779                                         prevbuffer = resizebuffer;
780                                         qglTexImage2D(cubemapside[i], mip++, internalformat, width, height, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
781                                         CHECKGLERROR
782                                 }
783                         }
784                 }
785                 break;
786         }
787         GL_SetupTextureParameters(glt->image->flags, glt->image->texturetype);
788 }
789
790 static void R_FindImageForTexture(gltexture_t *glt)
791 {
792         int i, j, best, best2, x, y, z, w, h, d;
793         textypeinfo_t *texinfo;
794         gltexturepool_t *pool;
795         gltextureimage_t *image, **imagechainpointer;
796         texinfo = glt->textype;
797         pool = glt->pool;
798
799         // remains -1 until uploaded
800         glt->texnum = -1;
801
802         x = 0;
803         y = 0;
804         z = 0;
805         w = glt->width;
806         h = glt->height;
807         d = glt->depth;
808         if (glt->flags & TEXF_FRAGMENT)
809         {
810                 for (imagechainpointer = &pool->imagechain;*imagechainpointer;imagechainpointer = &(*imagechainpointer)->imagechain)
811                 {
812                         image = *imagechainpointer;
813                         if (image->type != GLIMAGETYPE_FRAGMENTS)
814                                 continue;
815                         if (image->texturetype != glt->texturetype)
816                                 continue;
817                         if ((image->flags ^ glt->flags) & (TEXF_MIPMAP | TEXF_ALPHA | TEXF_CLAMP))
818                                 continue;
819                         if (image->glformat != texinfo->glformat || image->glinternalformat != texinfo->glinternalformat)
820                                 continue;
821                         if (glt->width > image->width || glt->height > image->height || glt->depth > image->depth)
822                                 continue;
823
824                         // got a fragments texture, find a place in it if we can
825                         for (best = image->width, i = 0;i < image->width - w;i++)
826                         {
827                                 for (best2 = 0, j = 0;j < w;j++)
828                                 {
829                                         if (image->blockallocation[i+j] >= best)
830                                                 break;
831                                         if (best2 < image->blockallocation[i+j])
832                                                 best2 = image->blockallocation[i+j];
833                                 }
834                                 if (j == w)
835                                 {
836                                         // this is a valid spot
837                                         x = i;
838                                         y = best = best2;
839                                 }
840                         }
841
842                         if (best + h > image->height)
843                                 continue;
844
845                         for (i = 0;i < w;i++)
846                                 image->blockallocation[x + i] = best + h;
847
848                         glt->x = x;
849                         glt->y = y;
850                         glt->z = 0;
851                         glt->image = image;
852                         image->texturecount++;
853                         return;
854                 }
855
856                 image = Mem_Alloc(texturemempool, sizeof(gltextureimage_t));
857                 if (image == NULL)
858                         Sys_Error("R_FindImageForTexture: ran out of memory\n");
859                 image->type = GLIMAGETYPE_FRAGMENTS;
860                 // make sure the created image is big enough for the fragment
861                 for (image->width = block_size;image->width < glt->width;image->width <<= 1);
862                 image->height = 1;
863                 if (gltexturetypedimensions[glt->texturetype] >= 2)
864                         for (image->height = block_size;image->height < glt->height;image->height <<= 1);
865                 image->depth = 1;
866                 if (gltexturetypedimensions[glt->texturetype] >= 3)
867                         for (image->depth = block_size;image->depth < glt->depth;image->depth <<= 1);
868                 image->blockallocation = Mem_Alloc(texturemempool, image->width * sizeof(short));
869                 memset(image->blockallocation, 0, image->width * sizeof(short));
870
871                 x = 0;
872                 y = 0;
873                 z = 0;
874                 for (i = 0;i < w;i++)
875                         image->blockallocation[x + i] = y + h;
876         }
877         else
878         {
879                 for (imagechainpointer = &pool->imagechain;*imagechainpointer;imagechainpointer = &(*imagechainpointer)->imagechain);
880
881                 image = Mem_Alloc(texturemempool, sizeof(gltextureimage_t));
882                 if (image == NULL)
883                         Sys_Error("R_FindImageForTexture: ran out of memory\n");
884                 image->type = GLIMAGETYPE_TILE;
885                 image->blockallocation = NULL;
886
887                 // calculate final size
888                 if (r_max_size.integer > realmaxsize)
889                         Cvar_SetValue("r_max_size", realmaxsize);
890                 for (image->width = 1;image->width < glt->width;image->width <<= 1);
891                 for (image->height = 1;image->height < glt->height;image->height <<= 1);
892                 for (image->depth = 1;image->depth < glt->depth;image->depth <<= 1);
893                 for (image->width >>= r_picmip.integer;image->width > r_max_size.integer;image->width >>= 1);
894                 for (image->height >>= r_picmip.integer;image->height > r_max_size.integer;image->height >>= 1);
895                 for (image->depth >>= r_picmip.integer;image->depth > r_max_size.integer;image->depth >>= 1);
896                 if (image->width < 1) image->width = 1;
897                 if (image->height < 1) image->height = 1;
898                 if (image->depth < 1) image->depth = 1;
899         }
900         image->texturetype = glt->texturetype;
901         image->glinternalformat = texinfo->glinternalformat;
902         image->glformat = texinfo->glformat;
903         image->flags = (glt->flags & (TEXF_MIPMAP | TEXF_ALPHA | TEXF_CLAMP)) | GLTEXF_UPLOAD;
904         image->bytesperpixel = texinfo->internalbytesperpixel;
905         image->sides = image->texturetype == GLTEXTURETYPE_CUBEMAP ? 6 : 1;
906         // get a texture number to use
907         qglGenTextures(1, &image->texnum);
908         *imagechainpointer = image;
909         image->texturecount++;
910
911         glt->x = x;
912         glt->y = y;
913         glt->y = z;
914         glt->image = image;
915 }
916
917 // note: R_FindImageForTexture must be called before this
918 static void R_UploadTexture (gltexture_t *glt)
919 {
920         if (!(glt->flags & GLTEXF_UPLOAD))
921                 return;
922
923         R_Upload(glt, glt->inputtexels);
924         if (glt->inputtexels)
925         {
926                 Mem_Free(glt->inputtexels);
927                 glt->inputtexels = NULL;
928                 glt->flags |= GLTEXF_DESTROYED;
929         }
930         else if (glt->flags & GLTEXF_DESTROYED)
931                 Con_Printf("R_UploadTexture: Texture %s already uploaded and destroyed.  Can not upload original image again.  Uploaded blank texture.\n", glt->identifier);
932 }
933
934 static rtexture_t *R_SetupTexture(rtexturepool_t *rtexturepool, const char *identifier, int width, int height, int depth, int sides, int flags, int textype, int texturetype, const qbyte *data, const unsigned int *palette)
935 {
936         int i, size;
937         gltexture_t *glt;
938         gltexturepool_t *pool = (gltexturepool_t *)rtexturepool;
939         textypeinfo_t *texinfo;
940
941         if (cls.state == ca_dedicated)
942                 return NULL;
943
944         if (flags & TEXF_FRAGMENT && texturetype != GLTEXTURETYPE_2D)
945                 Sys_Error("R_LoadTexture: only 2D fragment textures implemented\n");
946         if (texturetype == GLTEXTURETYPE_CUBEMAP && !gl_texturecubemap)
947                 Sys_Error("R_LoadTexture: cubemap texture not supported by driver\n");
948         if (texturetype == GLTEXTURETYPE_3D && !gl_texture3d)
949                 Sys_Error("R_LoadTexture: 3d texture not supported by driver\n");
950
951         /*
952         glt = R_FindTexture (pool, identifier);
953         if (glt)
954         {
955                 Con_Printf("R_LoadTexture: replacing existing texture %s\n", identifier);
956                 R_FreeTexture((rtexture_t *)glt);
957         }
958         */
959
960         texinfo = R_GetTexTypeInfo(textype, flags);
961         size = width * height * depth * sides * texinfo->inputbytesperpixel;
962
963         // clear the alpha flag if the texture has no transparent pixels
964         switch(textype)
965         {
966         case TEXTYPE_PALETTE:
967                 if (flags & TEXF_ALPHA)
968                 {
969                         flags &= ~TEXF_ALPHA;
970                         if (data)
971                         {
972                                 for (i = 0;i < size;i++)
973                                 {
974                                         if (((qbyte *)&palette[data[i]])[3] == 255)
975                                         {
976                                                 flags |= TEXF_ALPHA;
977                                                 break;
978                                         }
979                                 }
980                         }
981                 }
982                 break;
983         case TEXTYPE_RGB:
984                 if (flags & TEXF_ALPHA)
985                         Host_Error("R_LoadTexture: RGB has no alpha, don't specify TEXF_ALPHA\n");
986                 break;
987         case TEXTYPE_RGBA:
988                 if (flags & TEXF_ALPHA)
989                 {
990                         flags &= ~TEXF_ALPHA;
991                         if (data)
992                         {
993                                 for (i = 3;i < size;i += 4)
994                                 {
995                                         if (data[i] < 255)
996                                         {
997                                                 flags |= TEXF_ALPHA;
998                                                 break;
999                                         }
1000                                 }
1001                         }
1002                 }
1003                 break;
1004         default:
1005                 Host_Error("R_LoadTexture: unknown texture type\n");
1006         }
1007
1008         glt = Mem_Alloc(texturemempool, sizeof(gltexture_t));
1009         if (identifier)
1010         {
1011                 glt->identifier = Mem_Alloc(texturemempool, strlen(identifier)+1);
1012                 strcpy (glt->identifier, identifier);
1013         }
1014         else
1015                 glt->identifier = NULL;
1016         glt->pool = pool;
1017         glt->chain = pool->gltchain;
1018         pool->gltchain = glt;
1019         glt->width = width;
1020         glt->height = height;
1021         glt->depth = depth;
1022         glt->flags = flags | GLTEXF_UPLOAD;
1023         glt->textype = texinfo;
1024         glt->texturetype = texturetype;
1025         glt->inputdatasize = size;
1026         glt->palette = palette;
1027
1028         if (data)
1029         {
1030                 glt->inputtexels = Mem_Alloc(texturedatamempool, size);
1031                 if (glt->inputtexels == NULL)
1032                         Sys_Error("R_SetupTexture: out of memory\n");
1033                 memcpy(glt->inputtexels, data, size);
1034         }
1035         else
1036                 glt->inputtexels = NULL;
1037
1038         R_FindImageForTexture(glt);
1039         R_PrecacheTexture(glt);
1040
1041         return (rtexture_t *)glt;
1042 }
1043
1044 rtexture_t *R_LoadTexture1D(rtexturepool_t *rtexturepool, const char *identifier, int width, const qbyte *data, int textype, int flags, const unsigned int *palette)
1045 {
1046         return R_SetupTexture(rtexturepool, identifier, width, 1, 1, 1, flags, textype, GLTEXTURETYPE_1D, data, palette);
1047 }
1048
1049 rtexture_t *R_LoadTexture2D(rtexturepool_t *rtexturepool, const char *identifier, int width, int height, const qbyte *data, int textype, int flags, const unsigned int *palette)
1050 {
1051         return R_SetupTexture(rtexturepool, identifier, width, height, 1, 1, flags, textype, GLTEXTURETYPE_2D, data, palette);
1052 }
1053
1054 rtexture_t *R_LoadTexture3D(rtexturepool_t *rtexturepool, const char *identifier, int width, int height, int depth, const qbyte *data, int textype, int flags, const unsigned int *palette)
1055 {
1056         return R_SetupTexture(rtexturepool, identifier, width, height, depth, 1, flags, textype, GLTEXTURETYPE_3D, data, palette);
1057 }
1058
1059 rtexture_t *R_LoadTextureCubeMap(rtexturepool_t *rtexturepool, const char *identifier, int width, const qbyte *data, int textype, int flags, const unsigned int *palette)
1060 {
1061         return R_SetupTexture(rtexturepool, identifier, width, width, 1, 6, flags, textype, GLTEXTURETYPE_CUBEMAP, data, palette);
1062 }
1063
1064 int R_TextureHasAlpha(rtexture_t *rt)
1065 {
1066         return rt ? (((gltexture_t *)rt)->flags & TEXF_ALPHA) != 0 : false;
1067 }
1068
1069 int R_TextureWidth(rtexture_t *rt)
1070 {
1071         return rt ? ((gltexture_t *)rt)->width : 0;
1072 }
1073
1074 int R_TextureHeight(rtexture_t *rt)
1075 {
1076         return rt ? ((gltexture_t *)rt)->height : 0;
1077 }
1078
1079 void R_FragmentLocation3D(rtexture_t *rt, int *x, int *y, int *z, float *fx1, float *fy1, float *fz1, float *fx2, float *fy2, float *fz2)
1080 {
1081         gltexture_t *glt;
1082         float iwidth, iheight, idepth;
1083         if (cls.state == ca_dedicated)
1084         {
1085                 if (x)
1086                         *x = 0;
1087                 if (y)
1088                         *y = 0;
1089                 if (z)
1090                         *z = 0;
1091                 if (fx1 || fy1 || fx2 || fy2)
1092                 {
1093                         if (fx1)
1094                                 *fx1 = 0;
1095                         if (fy1)
1096                                 *fy1 = 0;
1097                         if (fz1)
1098                                 *fz1 = 0;
1099                         if (fx2)
1100                                 *fx2 = 1;
1101                         if (fy2)
1102                                 *fy2 = 1;
1103                         if (fz2)
1104                                 *fz2 = 1;
1105                 }
1106                 return;
1107         }
1108         if (!rt)
1109                 Host_Error("R_FragmentLocation: no texture supplied\n");
1110         glt = (gltexture_t *)rt;
1111         if (glt->flags & TEXF_FRAGMENT)
1112         {
1113                 if (x)
1114                         *x = glt->x;
1115                 if (y)
1116                         *y = glt->y;
1117                 if (fx1 || fy1 || fx2 || fy2)
1118                 {
1119                         iwidth = 1.0f / glt->image->width;
1120                         iheight = 1.0f / glt->image->height;
1121                         idepth = 1.0f / glt->image->depth;
1122                         if (fx1)
1123                                 *fx1 = glt->x * iwidth;
1124                         if (fy1)
1125                                 *fy1 = glt->y * iheight;
1126                         if (fz1)
1127                                 *fz1 = glt->z * idepth;
1128                         if (fx2)
1129                                 *fx2 = (glt->x + glt->width) * iwidth;
1130                         if (fy2)
1131                                 *fy2 = (glt->y + glt->height) * iheight;
1132                         if (fz2)
1133                                 *fz2 = (glt->z + glt->depth) * idepth;
1134                 }
1135         }
1136         else
1137         {
1138                 if (x)
1139                         *x = 0;
1140                 if (y)
1141                         *y = 0;
1142                 if (z)
1143                         *z = 0;
1144                 if (fx1 || fy1 || fx2 || fy2)
1145                 {
1146                         if (fx1)
1147                                 *fx1 = 0;
1148                         if (fy1)
1149                                 *fy1 = 0;
1150                         if (fz1)
1151                                 *fz1 = 0;
1152                         if (fx2)
1153                                 *fx2 = 1;
1154                         if (fy2)
1155                                 *fy2 = 1;
1156                         if (fz2)
1157                                 *fz2 = 1;
1158                 }
1159         }
1160 }
1161
1162 void R_FragmentLocation(rtexture_t *rt, int *x, int *y, float *fx1, float *fy1, float *fx2, float *fy2)
1163 {
1164         R_FragmentLocation3D(rt, x, y, NULL, fx1, fy1, NULL, fx2, fy2, NULL);
1165 }
1166
1167 int R_CompatibleFragmentWidth(int width, int textype, int flags)
1168 {
1169         return width;
1170 }
1171
1172 void R_UpdateTexture(rtexture_t *rt, qbyte *data)
1173 {
1174         gltexture_t *glt;
1175         if (rt == NULL)
1176                 Host_Error("R_UpdateTexture: no texture supplied\n");
1177         if (data == NULL)
1178                 Host_Error("R_UpdateTexture: no data supplied\n");
1179         glt = (gltexture_t *)rt;
1180
1181         // if it has not been uploaded yet, update the data that will be used when it is
1182         if (glt->inputtexels)
1183                 memcpy(glt->inputtexels, data, glt->inputdatasize);
1184         else
1185                 R_Upload(glt, data);
1186 }
1187