added R_ScrollTexCoord2f (copies while texture coordinates with an offset)
[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 (!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 }
376
377 static int R_CalcTexelDataSize (gltexture_t *glt)
378 {
379         int width2, height2, depth2, size;
380         if (glt->flags & TEXF_FRAGMENT)
381                 size = glt->width * glt->height * glt->depth;
382         else
383         {
384                 if (r_max_size.integer > realmaxsize)
385                         Cvar_SetValue("r_max_size", realmaxsize);
386                 // calculate final size
387                 for (width2 = 1;width2 < glt->width;width2 <<= 1);
388                 for (height2 = 1;height2 < glt->height;height2 <<= 1);
389                 for (depth2 = 1;depth2 < glt->depth;depth2 <<= 1);
390                 for (width2 >>= r_picmip.integer;width2 > r_max_size.integer;width2 >>= 1);
391                 for (height2 >>= r_picmip.integer;height2 > r_max_size.integer;height2 >>= 1);
392                 for (depth2 >>= r_picmip.integer;depth2 > r_max_size.integer;depth2 >>= 1);
393                 if (width2 < 1) width2 = 1;
394                 if (height2 < 1) height2 = 1;
395                 if (depth2 < 1) depth2 = 1;
396
397                 size = 0;
398                 if (glt->flags & TEXF_MIPMAP)
399                 {
400                         while (width2 > 1 || height2 > 1 || depth2 > 1)
401                         {
402                                 size += width2 * height2 * depth2;
403                                 if (width2 > 1)
404                                         width2 >>= 1;
405                                 if (height2 > 1)
406                                         height2 >>= 1;
407                                 if (depth2 > 1)
408                                         depth2 >>= 1;
409                         }
410                         size++; // count the last 1x1 mipmap
411                 }
412                 else
413                         size = width2 * height2 * depth2;
414         }
415         size *= glt->textype->internalbytesperpixel * glt->image->sides;
416
417         return size;
418 }
419
420 void R_TextureStats_PrintTotal(void)
421 {
422         int glsize, total = 0, totalt = 0, totalp = 0, loaded = 0, loadedt = 0, loadedp = 0;
423         gltexture_t *glt;
424         gltexturepool_t *pool;
425         for (pool = gltexturepoolchain;pool;pool = pool->next)
426         {
427                 for (glt = pool->gltchain;glt;glt = glt->chain)
428                 {
429                         glsize = R_CalcTexelDataSize(glt);
430                         total++;
431                         totalt += glsize;
432                         totalp += glt->inputdatasize;
433                         if (!(glt->flags & GLTEXF_UPLOAD))
434                         {
435                                 loaded++;
436                                 loadedt += glsize;
437                                 loadedp += glt->inputdatasize;
438                         }
439                 }
440         }
441         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);
442 }
443
444 static void R_TextureStats_f(void)
445 {
446         int loaded;
447         gltexture_t *glt;
448         gltexturepool_t *pool;
449         Con_Printf("glsize input loaded mip alpha name\n");
450         for (pool = gltexturepoolchain;pool;pool = pool->next)
451         {
452                 for (glt = pool->gltchain;glt;glt = glt->chain)
453                 {
454                         loaded = !(glt->flags & GLTEXF_UPLOAD);
455                         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>");
456                 }
457                 Con_Printf("pool %10p\n", pool);
458         }
459         R_TextureStats_PrintTotal();
460 }
461
462 char engineversion[40];
463
464 static void r_textures_start(void)
465 {
466         // deal with size limits of various drivers (3dfx in particular)
467         qglGetIntegerv(GL_MAX_TEXTURE_SIZE, &realmaxsize);
468         CHECKGLERROR
469         // LordHavoc: allow any alignment
470         qglPixelStorei(GL_UNPACK_ALIGNMENT, 1);
471         CHECKGLERROR
472
473         // use the largest scrap texture size we can (not sure if this is really a good idea)
474         for (block_size = 1;block_size < realmaxsize && block_size < r_max_scrapsize.integer;block_size <<= 1);
475
476         texturemempool = Mem_AllocPool("Texture Info");
477         texturedatamempool = Mem_AllocPool("Texture Storage (not yet uploaded)");
478         textureprocessingmempool = Mem_AllocPool("Texture Processing Buffers");
479
480         // Disable JPEG screenshots if the DLL isn't loaded
481         if (! JPEG_OpenLibrary ())
482                 Cvar_SetValueQuick (&scr_screenshot_jpeg, 0);
483 }
484
485 static void r_textures_shutdown(void)
486 {
487         rtexturepool_t *temp;
488
489         JPEG_CloseLibrary ();
490
491         while(gltexturepoolchain)
492         {
493                 temp = (rtexturepool_t *) gltexturepoolchain;
494                 R_FreeTexturePool(&temp);
495         }
496
497         resizebuffersize = 0;
498         texturebuffersize = 0;
499         resizebuffer = NULL;
500         colorconvertbuffer = NULL;
501         texturebuffer = NULL;
502         Mem_FreePool(&texturemempool);
503         Mem_FreePool(&texturedatamempool);
504         Mem_FreePool(&textureprocessingmempool);
505 }
506
507 static void r_textures_newmap(void)
508 {
509 }
510
511 void R_Textures_Init (void)
512 {
513         Cmd_AddCommand("gl_texturemode", &GL_TextureMode_f);
514         Cmd_AddCommand("r_texturestats", R_TextureStats_f);
515         Cvar_RegisterVariable (&r_max_scrapsize);
516         Cvar_RegisterVariable (&r_max_size);
517         Cvar_RegisterVariable (&r_picmip);
518         Cvar_RegisterVariable (&r_lerpimages);
519         Cvar_RegisterVariable (&r_precachetextures);
520
521         R_RegisterModule("R_Textures", r_textures_start, r_textures_shutdown, r_textures_newmap);
522 }
523
524 void R_Textures_Frame (void)
525 {
526         // could do procedural texture animation here, if we keep track of which
527         // textures were accessed this frame...
528
529         // free the resize buffers
530         resizebuffersize = 0;
531         if (resizebuffer)
532         {
533                 Mem_Free(resizebuffer);
534                 resizebuffer = NULL;
535         }
536         if (colorconvertbuffer)
537         {
538                 Mem_Free(colorconvertbuffer);
539                 colorconvertbuffer = NULL;
540         }
541 }
542
543 void R_MakeResizeBufferBigger(int size)
544 {
545         if (resizebuffersize < size)
546         {
547                 resizebuffersize = size;
548                 if (resizebuffer)
549                         Mem_Free(resizebuffer);
550                 if (colorconvertbuffer)
551                         Mem_Free(colorconvertbuffer);
552                 resizebuffer = Mem_Alloc(textureprocessingmempool, resizebuffersize);
553                 colorconvertbuffer = Mem_Alloc(textureprocessingmempool, resizebuffersize);
554                 if (!resizebuffer || !colorconvertbuffer)
555                         Host_Error("R_Upload: out of memory\n");
556         }
557 }
558
559 static void GL_SetupTextureParameters(int flags, int texturetype)
560 {
561         int textureenum = gltexturetypeenums[texturetype];
562         int wrapmode = ((flags & TEXF_CLAMP) && gl_support_clamptoedge) ? GL_CLAMP_TO_EDGE : GL_REPEAT;
563
564         CHECKGLERROR
565
566         qglTexParameteri(textureenum, GL_TEXTURE_WRAP_S, wrapmode);
567         qglTexParameteri(textureenum, GL_TEXTURE_WRAP_T, wrapmode);
568         if (gltexturetypedimensions[texturetype] >= 3)
569                 qglTexParameteri(textureenum, GL_TEXTURE_WRAP_R, wrapmode);
570
571         if (flags & TEXF_FORCENEAREST)
572         {
573                 if (flags & TEXF_MIPMAP)
574                         qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, GL_NEAREST_MIPMAP_NEAREST);
575                 else
576                         qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
577                 qglTexParameteri(textureenum, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
578         }
579         else if (flags & TEXF_FORCELINEAR)
580         {
581                 if (flags & TEXF_MIPMAP)
582                 {
583                         if (gl_filter_min == GL_NEAREST_MIPMAP_LINEAR || gl_filter_min == GL_LINEAR_MIPMAP_LINEAR)
584                                 qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
585                         else
586                                 qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_NEAREST);
587                 }
588                 else
589                         qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
590                 qglTexParameteri(textureenum, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
591         }
592         else
593         {
594                 if (flags & TEXF_MIPMAP)
595                         qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, gl_filter_min);
596                 else
597                         qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, gl_filter_mag);
598                 qglTexParameteri(textureenum, GL_TEXTURE_MAG_FILTER, gl_filter_mag);
599         }
600
601         CHECKGLERROR
602 }
603
604 static void R_Upload(gltexture_t *glt, qbyte *data)
605 {
606         int i, mip, width, height, depth, internalformat;
607         qbyte *prevbuffer;
608         prevbuffer = data;
609
610         R_Mesh_EndBatch();
611
612         CHECKGLERROR
613
614         glt->texnum = glt->image->texnum;
615         qglBindTexture(gltexturetypeenums[glt->image->texturetype], glt->image->texnum);
616         CHECKGLERROR
617         glt->flags &= ~GLTEXF_UPLOAD;
618         gl_backend_rebindtextures = true;
619
620         if (glt->flags & TEXF_FRAGMENT)
621         {
622                 if (glt->image->flags & GLTEXF_UPLOAD)
623                 {
624                         glt->image->flags &= ~GLTEXF_UPLOAD;
625                         Con_DPrintf("uploaded new fragments image\n");
626                         R_MakeResizeBufferBigger(glt->image->width * glt->image->height * glt->image->depth * glt->image->bytesperpixel);
627                         memset(resizebuffer, 255, glt->image->width * glt->image->height * glt->image->depth * glt->image->bytesperpixel);
628                         switch(glt->image->texturetype)
629                         {
630                         case GLTEXTURETYPE_1D:
631                                 qglTexImage1D(GL_TEXTURE_1D, 0, glt->image->glinternalformat, glt->image->width, 0, glt->image->glformat, GL_UNSIGNED_BYTE, resizebuffer);
632                                 CHECKGLERROR
633                                 break;
634                         case GLTEXTURETYPE_2D:
635                                 qglTexImage2D(GL_TEXTURE_2D, 0, glt->image->glinternalformat, glt->image->width, glt->image->height, 0, glt->image->glformat, GL_UNSIGNED_BYTE, resizebuffer);
636                                 CHECKGLERROR
637                                 break;
638                         case GLTEXTURETYPE_3D:
639                                 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);
640                                 CHECKGLERROR
641                                 break;
642                         default:
643                                 Host_Error("R_Upload: fragment texture of type other than 1D, 2D, or 3D\n");
644                                 break;
645                         }
646                         GL_SetupTextureParameters(glt->image->flags, glt->image->texturetype);
647                 }
648
649                 if (prevbuffer == NULL)
650                 {
651                         R_MakeResizeBufferBigger(glt->image->width * glt->image->height * glt->image->depth * glt->image->bytesperpixel);
652                         memset(resizebuffer, 255, glt->width * glt->height * glt->image->depth * glt->image->bytesperpixel);
653                         prevbuffer = resizebuffer;
654                 }
655                 else if (glt->textype->textype == TEXTYPE_PALETTE)
656                 {
657                         // promote paletted to RGBA, so we only have to worry about RGB and
658                         // RGBA in the rest of this code
659                         R_MakeResizeBufferBigger(glt->image->width * glt->image->height * glt->image->depth * glt->image->sides * glt->image->bytesperpixel);
660                         Image_Copy8bitRGBA(prevbuffer, colorconvertbuffer, glt->width * glt->height * glt->depth, glt->palette);
661                         prevbuffer = colorconvertbuffer;
662                 }
663
664                 switch(glt->image->texturetype)
665                 {
666                 case GLTEXTURETYPE_1D:
667                         qglTexSubImage1D(GL_TEXTURE_1D, 0, glt->x, glt->width, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
668                         CHECKGLERROR
669                         break;
670                 case GLTEXTURETYPE_2D:
671                         qglTexSubImage2D(GL_TEXTURE_2D, 0, glt->x, glt->y, glt->width, glt->height, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
672                         CHECKGLERROR
673                         break;
674                 case GLTEXTURETYPE_3D:
675                         qglTexSubImage3D(GL_TEXTURE_3D, 0, glt->x, glt->y, glt->z, glt->width, glt->height, glt->depth, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
676                         CHECKGLERROR
677                         break;
678                 default:
679                         Host_Error("R_Upload: fragment texture of type other than 1D, 2D, or 3D\n");
680                         break;
681                 }
682                 glt->texnum = glt->image->texnum;
683                 return;
684         }
685
686         glt->image->flags &= ~GLTEXF_UPLOAD;
687
688         // these are rounded up versions of the size to do better resampling
689         for (width  = 1;width  < glt->width ;width  <<= 1);
690         for (height = 1;height < glt->height;height <<= 1);
691         for (depth  = 1;depth  < glt->depth ;depth  <<= 1);
692
693         R_MakeResizeBufferBigger(width * height * depth * glt->image->sides * glt->image->bytesperpixel);
694
695         if (prevbuffer == NULL)
696         {
697                 width = glt->image->width;
698                 height = glt->image->height;
699                 depth = glt->image->depth;
700                 memset(resizebuffer, 255, width * height * depth * glt->image->bytesperpixel);
701                 prevbuffer = resizebuffer;
702         }
703         else
704         {
705                 if (glt->textype->textype == TEXTYPE_PALETTE)
706                 {
707                         // promote paletted to RGBA, so we only have to worry about RGB and
708                         // RGBA in the rest of this code
709                         Image_Copy8bitRGBA(prevbuffer, colorconvertbuffer, glt->width * glt->height * glt->depth * glt->image->sides, glt->palette);
710                         prevbuffer = colorconvertbuffer;
711                 }
712         }
713
714         // 3 and 4 are converted by the driver to it's preferred format for the current display mode
715         internalformat = 3;
716         if (glt->flags & TEXF_ALPHA)
717                 internalformat = 4;
718
719         // cubemaps contain multiple images and thus get processed a bit differently
720         if (glt->image->texturetype != GLTEXTURETYPE_CUBEMAP)
721         {
722                 if (glt->width != width || glt->height != height || glt->depth != depth)
723                 {
724                         Image_Resample(prevbuffer, glt->width, glt->height, glt->depth, resizebuffer, width, height, depth, glt->image->bytesperpixel, r_lerpimages.integer);
725                         prevbuffer = resizebuffer;
726                 }
727                 // picmip/max_size
728                 while (width > glt->image->width || height > glt->image->height || depth > glt->image->depth)
729                 {
730                         Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, glt->image->width, glt->image->height, glt->image->depth, glt->image->bytesperpixel);
731                         prevbuffer = resizebuffer;
732                 }
733         }
734         mip = 0;
735         switch(glt->image->texturetype)
736         {
737         case GLTEXTURETYPE_1D:
738                 qglTexImage1D(GL_TEXTURE_1D, mip++, internalformat, width, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
739                 CHECKGLERROR
740                 if (glt->flags & TEXF_MIPMAP)
741                 {
742                         while (width > 1 || height > 1 || depth > 1)
743                         {
744                                 Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1, glt->image->bytesperpixel);
745                                 prevbuffer = resizebuffer;
746                                 qglTexImage1D(GL_TEXTURE_1D, mip++, internalformat, width, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
747                                 CHECKGLERROR
748                         }
749                 }
750                 break;
751         case GLTEXTURETYPE_2D:
752                 qglTexImage2D(GL_TEXTURE_2D, mip++, internalformat, width, height, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
753                 CHECKGLERROR
754                 if (glt->flags & TEXF_MIPMAP)
755                 {
756                         while (width > 1 || height > 1 || depth > 1)
757                         {
758                                 Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1, glt->image->bytesperpixel);
759                                 prevbuffer = resizebuffer;
760                                 qglTexImage2D(GL_TEXTURE_2D, mip++, internalformat, width, height, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
761                                 CHECKGLERROR
762                         }
763                 }
764                 break;
765         case GLTEXTURETYPE_3D:
766                 qglTexImage3D(GL_TEXTURE_3D, mip++, internalformat, width, height, depth, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
767                 CHECKGLERROR
768                 if (glt->flags & TEXF_MIPMAP)
769                 {
770                         while (width > 1 || height > 1 || depth > 1)
771                         {
772                                 Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1, glt->image->bytesperpixel);
773                                 prevbuffer = resizebuffer;
774                                 qglTexImage3D(GL_TEXTURE_3D, mip++, internalformat, width, height, depth, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
775                                 CHECKGLERROR
776                         }
777                 }
778                 break;
779         case GLTEXTURETYPE_CUBEMAP:
780                 // convert and upload each side in turn,
781                 // from a continuous block of input texels
782                 texturebuffer = prevbuffer;
783                 for (i = 0;i < 6;i++)
784                 {
785                         prevbuffer = texturebuffer;
786                         texturebuffer += width * height * depth * glt->textype->inputbytesperpixel;
787                         if (glt->width != width || glt->height != height || glt->depth != depth)
788                         {
789                                 Image_Resample(prevbuffer, glt->width, glt->height, glt->depth, resizebuffer, width, height, depth, glt->image->bytesperpixel, r_lerpimages.integer);
790                                 prevbuffer = resizebuffer;
791                         }
792                         // picmip/max_size
793                         while (width > glt->image->width || height > glt->image->height || depth > glt->image->depth)
794                         {
795                                 Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, glt->image->width, glt->image->height, glt->image->depth, glt->image->bytesperpixel);
796                                 prevbuffer = resizebuffer;
797                         }
798                         mip = 0;
799                         qglTexImage2D(cubemapside[i], mip++, internalformat, width, height, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
800                         CHECKGLERROR
801                         if (glt->flags & TEXF_MIPMAP)
802                         {
803                                 while (width > 1 || height > 1 || depth > 1)
804                                 {
805                                         Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1, glt->image->bytesperpixel);
806                                         prevbuffer = resizebuffer;
807                                         qglTexImage2D(cubemapside[i], mip++, internalformat, width, height, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
808                                         CHECKGLERROR
809                                 }
810                         }
811                 }
812                 break;
813         }
814         GL_SetupTextureParameters(glt->image->flags, glt->image->texturetype);
815 }
816
817 static void R_FindImageForTexture(gltexture_t *glt)
818 {
819         int i, j, best, best2, x, y, z, w, h, d;
820         textypeinfo_t *texinfo;
821         gltexturepool_t *pool;
822         gltextureimage_t *image, **imagechainpointer;
823         texinfo = glt->textype;
824         pool = glt->pool;
825
826         // remains -1 until uploaded
827         glt->texnum = -1;
828
829         x = 0;
830         y = 0;
831         z = 0;
832         w = glt->width;
833         h = glt->height;
834         d = glt->depth;
835         if (glt->flags & TEXF_FRAGMENT)
836         {
837                 for (imagechainpointer = &pool->imagechain;*imagechainpointer;imagechainpointer = &(*imagechainpointer)->imagechain)
838                 {
839                         image = *imagechainpointer;
840                         if (image->type != GLIMAGETYPE_FRAGMENTS)
841                                 continue;
842                         if (image->texturetype != glt->texturetype)
843                                 continue;
844                         if ((image->flags ^ glt->flags) & (TEXF_MIPMAP | TEXF_ALPHA | TEXF_CLAMP))
845                                 continue;
846                         if (image->glformat != texinfo->glformat || image->glinternalformat != texinfo->glinternalformat)
847                                 continue;
848                         if (glt->width > image->width || glt->height > image->height || glt->depth > image->depth)
849                                 continue;
850
851                         // got a fragments texture, find a place in it if we can
852                         for (best = image->width, i = 0;i < image->width - w;i++)
853                         {
854                                 for (best2 = 0, j = 0;j < w;j++)
855                                 {
856                                         if (image->blockallocation[i+j] >= best)
857                                                 break;
858                                         if (best2 < image->blockallocation[i+j])
859                                                 best2 = image->blockallocation[i+j];
860                                 }
861                                 if (j == w)
862                                 {
863                                         // this is a valid spot
864                                         x = i;
865                                         y = best = best2;
866                                 }
867                         }
868
869                         if (best + h > image->height)
870                                 continue;
871
872                         for (i = 0;i < w;i++)
873                                 image->blockallocation[x + i] = best + h;
874
875                         glt->x = x;
876                         glt->y = y;
877                         glt->z = 0;
878                         glt->image = image;
879                         image->texturecount++;
880                         return;
881                 }
882
883                 image = Mem_Alloc(texturemempool, sizeof(gltextureimage_t));
884                 if (image == NULL)
885                         Sys_Error("R_FindImageForTexture: ran out of memory\n");
886                 image->type = GLIMAGETYPE_FRAGMENTS;
887                 // make sure the created image is big enough for the fragment
888                 for (image->width = block_size;image->width < glt->width;image->width <<= 1);
889                 image->height = 1;
890                 if (gltexturetypedimensions[glt->texturetype] >= 2)
891                         for (image->height = block_size;image->height < glt->height;image->height <<= 1);
892                 image->depth = 1;
893                 if (gltexturetypedimensions[glt->texturetype] >= 3)
894                         for (image->depth = block_size;image->depth < glt->depth;image->depth <<= 1);
895                 image->blockallocation = Mem_Alloc(texturemempool, image->width * sizeof(short));
896                 memset(image->blockallocation, 0, image->width * sizeof(short));
897
898                 x = 0;
899                 y = 0;
900                 z = 0;
901                 for (i = 0;i < w;i++)
902                         image->blockallocation[x + i] = y + h;
903         }
904         else
905         {
906                 for (imagechainpointer = &pool->imagechain;*imagechainpointer;imagechainpointer = &(*imagechainpointer)->imagechain);
907
908                 image = Mem_Alloc(texturemempool, sizeof(gltextureimage_t));
909                 if (image == NULL)
910                         Sys_Error("R_FindImageForTexture: ran out of memory\n");
911                 image->type = GLIMAGETYPE_TILE;
912                 image->blockallocation = NULL;
913
914                 // calculate final size
915                 if (r_max_size.integer > realmaxsize)
916                         Cvar_SetValue("r_max_size", realmaxsize);
917                 for (image->width = 1;image->width < glt->width;image->width <<= 1);
918                 for (image->height = 1;image->height < glt->height;image->height <<= 1);
919                 for (image->depth = 1;image->depth < glt->depth;image->depth <<= 1);
920                 for (image->width >>= r_picmip.integer;image->width > r_max_size.integer;image->width >>= 1);
921                 for (image->height >>= r_picmip.integer;image->height > r_max_size.integer;image->height >>= 1);
922                 for (image->depth >>= r_picmip.integer;image->depth > r_max_size.integer;image->depth >>= 1);
923                 if (image->width < 1) image->width = 1;
924                 if (image->height < 1) image->height = 1;
925                 if (image->depth < 1) image->depth = 1;
926         }
927         image->texturetype = glt->texturetype;
928         image->glinternalformat = texinfo->glinternalformat;
929         image->glformat = texinfo->glformat;
930         image->flags = (glt->flags & (TEXF_MIPMAP | TEXF_ALPHA | TEXF_CLAMP)) | GLTEXF_UPLOAD;
931         image->bytesperpixel = texinfo->internalbytesperpixel;
932         image->sides = image->texturetype == GLTEXTURETYPE_CUBEMAP ? 6 : 1;
933         // get a texture number to use
934         qglGenTextures(1, &image->texnum);
935         *imagechainpointer = image;
936         image->texturecount++;
937
938         glt->x = x;
939         glt->y = y;
940         glt->y = z;
941         glt->image = image;
942 }
943
944 // note: R_FindImageForTexture must be called before this
945 static void R_UploadTexture (gltexture_t *glt)
946 {
947         if (!(glt->flags & GLTEXF_UPLOAD))
948                 return;
949
950         R_Upload(glt, glt->inputtexels);
951         if (glt->inputtexels)
952         {
953                 Mem_Free(glt->inputtexels);
954                 glt->inputtexels = NULL;
955                 glt->flags |= GLTEXF_DESTROYED;
956         }
957         else if (glt->flags & GLTEXF_DESTROYED)
958                 Con_Printf("R_UploadTexture: Texture %s already uploaded and destroyed.  Can not upload original image again.  Uploaded blank texture.\n", glt->identifier);
959 }
960
961 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)
962 {
963         int i, size;
964         gltexture_t *glt;
965         gltexturepool_t *pool = (gltexturepool_t *)rtexturepool;
966         textypeinfo_t *texinfo;
967
968         if (cls.state == ca_dedicated)
969                 return NULL;
970
971         if (flags & TEXF_FRAGMENT && texturetype != GLTEXTURETYPE_2D)
972                 Sys_Error("R_LoadTexture: only 2D fragment textures implemented\n");
973         if (texturetype == GLTEXTURETYPE_CUBEMAP && !gl_texturecubemap)
974                 Sys_Error("R_LoadTexture: cubemap texture not supported by driver\n");
975         if (texturetype == GLTEXTURETYPE_3D && !gl_texture3d)
976                 Sys_Error("R_LoadTexture: 3d texture not supported by driver\n");
977
978         /*
979         glt = R_FindTexture (pool, identifier);
980         if (glt)
981         {
982                 Con_Printf("R_LoadTexture: replacing existing texture %s\n", identifier);
983                 R_FreeTexture((rtexture_t *)glt);
984         }
985         */
986
987         texinfo = R_GetTexTypeInfo(textype, flags);
988         size = width * height * depth * sides * texinfo->inputbytesperpixel;
989         if (size < 1)
990                 Sys_Error("R_LoadTexture: bogus texture size (%dx%dx%dx%dbppx%dsides = %d bytes)\n", width, height, depth, texinfo->inputbytesperpixel * 8, sides);
991
992         // clear the alpha flag if the texture has no transparent pixels
993         switch(textype)
994         {
995         case TEXTYPE_PALETTE:
996                 if (flags & TEXF_ALPHA)
997                 {
998                         flags &= ~TEXF_ALPHA;
999                         if (data)
1000                         {
1001                                 for (i = 0;i < size;i++)
1002                                 {
1003                                         if (((qbyte *)&palette[data[i]])[3] < 255)
1004                                         {
1005                                                 flags |= TEXF_ALPHA;
1006                                                 break;
1007                                         }
1008                                 }
1009                         }
1010                 }
1011                 break;
1012         case TEXTYPE_RGB:
1013                 if (flags & TEXF_ALPHA)
1014                         Host_Error("R_LoadTexture: RGB has no alpha, don't specify TEXF_ALPHA\n");
1015                 break;
1016         case TEXTYPE_RGBA:
1017                 if (flags & TEXF_ALPHA)
1018                 {
1019                         flags &= ~TEXF_ALPHA;
1020                         if (data)
1021                         {
1022                                 for (i = 3;i < size;i += 4)
1023                                 {
1024                                         if (data[i] < 255)
1025                                         {
1026                                                 flags |= TEXF_ALPHA;
1027                                                 break;
1028                                         }
1029                                 }
1030                         }
1031                 }
1032                 break;
1033         default:
1034                 Host_Error("R_LoadTexture: unknown texture type\n");
1035         }
1036
1037         glt = Mem_Alloc(texturemempool, sizeof(gltexture_t));
1038         if (identifier)
1039         {
1040                 glt->identifier = Mem_Alloc(texturemempool, strlen(identifier)+1);
1041                 strcpy (glt->identifier, identifier);
1042         }
1043         else
1044                 glt->identifier = NULL;
1045         glt->pool = pool;
1046         glt->chain = pool->gltchain;
1047         pool->gltchain = glt;
1048         glt->width = width;
1049         glt->height = height;
1050         glt->depth = depth;
1051         glt->flags = flags | GLTEXF_UPLOAD;
1052         glt->textype = texinfo;
1053         glt->texturetype = texturetype;
1054         glt->inputdatasize = size;
1055         glt->palette = palette;
1056
1057         if (data)
1058         {
1059                 glt->inputtexels = Mem_Alloc(texturedatamempool, size);
1060                 if (glt->inputtexels == NULL)
1061                         Sys_Error("R_LoadTexture: out of memory\n");
1062                 memcpy(glt->inputtexels, data, size);
1063         }
1064         else
1065                 glt->inputtexels = NULL;
1066
1067         R_FindImageForTexture(glt);
1068         R_PrecacheTexture(glt);
1069
1070         return (rtexture_t *)glt;
1071 }
1072
1073 rtexture_t *R_LoadTexture1D(rtexturepool_t *rtexturepool, const char *identifier, int width, const qbyte *data, int textype, int flags, const unsigned int *palette)
1074 {
1075         return R_SetupTexture(rtexturepool, identifier, width, 1, 1, 1, flags, textype, GLTEXTURETYPE_1D, data, palette);
1076 }
1077
1078 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)
1079 {
1080         return R_SetupTexture(rtexturepool, identifier, width, height, 1, 1, flags, textype, GLTEXTURETYPE_2D, data, palette);
1081 }
1082
1083 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)
1084 {
1085         return R_SetupTexture(rtexturepool, identifier, width, height, depth, 1, flags, textype, GLTEXTURETYPE_3D, data, palette);
1086 }
1087
1088 rtexture_t *R_LoadTextureCubeMap(rtexturepool_t *rtexturepool, const char *identifier, int width, const qbyte *data, int textype, int flags, const unsigned int *palette)
1089 {
1090         return R_SetupTexture(rtexturepool, identifier, width, width, 1, 6, flags, textype, GLTEXTURETYPE_CUBEMAP, data, palette);
1091 }
1092
1093 int R_TextureHasAlpha(rtexture_t *rt)
1094 {
1095         return rt ? (((gltexture_t *)rt)->flags & TEXF_ALPHA) != 0 : false;
1096 }
1097
1098 int R_TextureWidth(rtexture_t *rt)
1099 {
1100         return rt ? ((gltexture_t *)rt)->width : 0;
1101 }
1102
1103 int R_TextureHeight(rtexture_t *rt)
1104 {
1105         return rt ? ((gltexture_t *)rt)->height : 0;
1106 }
1107
1108 void R_FragmentLocation3D(rtexture_t *rt, int *x, int *y, int *z, float *fx1, float *fy1, float *fz1, float *fx2, float *fy2, float *fz2)
1109 {
1110         gltexture_t *glt;
1111         float iwidth, iheight, idepth;
1112         if (cls.state == ca_dedicated)
1113         {
1114                 if (x)
1115                         *x = 0;
1116                 if (y)
1117                         *y = 0;
1118                 if (z)
1119                         *z = 0;
1120                 if (fx1 || fy1 || fx2 || fy2)
1121                 {
1122                         if (fx1)
1123                                 *fx1 = 0;
1124                         if (fy1)
1125                                 *fy1 = 0;
1126                         if (fz1)
1127                                 *fz1 = 0;
1128                         if (fx2)
1129                                 *fx2 = 1;
1130                         if (fy2)
1131                                 *fy2 = 1;
1132                         if (fz2)
1133                                 *fz2 = 1;
1134                 }
1135                 return;
1136         }
1137         if (!rt)
1138                 Host_Error("R_FragmentLocation: no texture supplied\n");
1139         glt = (gltexture_t *)rt;
1140         if (glt->flags & TEXF_FRAGMENT)
1141         {
1142                 if (x)
1143                         *x = glt->x;
1144                 if (y)
1145                         *y = glt->y;
1146                 if (fx1 || fy1 || fx2 || fy2)
1147                 {
1148                         iwidth = 1.0f / glt->image->width;
1149                         iheight = 1.0f / glt->image->height;
1150                         idepth = 1.0f / glt->image->depth;
1151                         if (fx1)
1152                                 *fx1 = glt->x * iwidth;
1153                         if (fy1)
1154                                 *fy1 = glt->y * iheight;
1155                         if (fz1)
1156                                 *fz1 = glt->z * idepth;
1157                         if (fx2)
1158                                 *fx2 = (glt->x + glt->width) * iwidth;
1159                         if (fy2)
1160                                 *fy2 = (glt->y + glt->height) * iheight;
1161                         if (fz2)
1162                                 *fz2 = (glt->z + glt->depth) * idepth;
1163                 }
1164         }
1165         else
1166         {
1167                 if (x)
1168                         *x = 0;
1169                 if (y)
1170                         *y = 0;
1171                 if (z)
1172                         *z = 0;
1173                 if (fx1 || fy1 || fx2 || fy2)
1174                 {
1175                         if (fx1)
1176                                 *fx1 = 0;
1177                         if (fy1)
1178                                 *fy1 = 0;
1179                         if (fz1)
1180                                 *fz1 = 0;
1181                         if (fx2)
1182                                 *fx2 = 1;
1183                         if (fy2)
1184                                 *fy2 = 1;
1185                         if (fz2)
1186                                 *fz2 = 1;
1187                 }
1188         }
1189 }
1190
1191 void R_FragmentLocation(rtexture_t *rt, int *x, int *y, float *fx1, float *fy1, float *fx2, float *fy2)
1192 {
1193         R_FragmentLocation3D(rt, x, y, NULL, fx1, fy1, NULL, fx2, fy2, NULL);
1194 }
1195
1196 int R_CompatibleFragmentWidth(int width, int textype, int flags)
1197 {
1198         return width;
1199 }
1200
1201 void R_UpdateTexture(rtexture_t *rt, qbyte *data)
1202 {
1203         gltexture_t *glt;
1204         if (rt == NULL)
1205                 Host_Error("R_UpdateTexture: no texture supplied\n");
1206         if (data == NULL)
1207                 Host_Error("R_UpdateTexture: no data supplied\n");
1208         glt = (gltexture_t *)rt;
1209
1210         // if it has not been uploaded yet, update the data that will be used when it is
1211         if (glt->inputtexels)
1212                 memcpy(glt->inputtexels, data, glt->inputdatasize);
1213         else
1214                 R_Upload(glt, data);
1215 }
1216