gl_textures.c

   1
   2 #include "quakedef.h"
   3 #include "image.h"
   4 #include "jpeg.h"
   5 #include "image_png.h"
   6
   7 cvar_t gl_max_size = {CVAR_SAVE, "gl_max_size", "2048", "maximum allowed texture size, can be used to reduce video memory usage, note: this is automatically reduced to match video card capabilities (such as 256 on 3Dfx cards before Voodoo4/5)"};
   8 cvar_t gl_picmip = {CVAR_SAVE, "gl_picmip", "0", "reduces resolution of textures by powers of 2, for example 1 will halve width/height, reducing texture memory usage by 75%"};
   9 cvar_t r_lerpimages = {CVAR_SAVE, "r_lerpimages", "1", "bilinear filters images when scaling them up to power of 2 size (mode 1), looks better than glquake (mode 0)"};
  10 cvar_t r_precachetextures = {CVAR_SAVE, "r_precachetextures", "1", "0 = never upload textures until used, 1 = upload most textures before use (exceptions: rarely used skin colormap layers), 2 = upload all textures before use (can increase texture memory usage significantly)"};
  11 cvar_t gl_texture_anisotropy = {CVAR_SAVE, "gl_texture_anisotropy", "1", "anisotropic filtering quality (if supported by hardware), 1 sample (no anisotropy) and 8 sample (8 tap anisotropy) are recommended values"};
  12
  13 int             gl_filter_min = GL_LINEAR_MIPMAP_LINEAR;
  14 int             gl_filter_mag = GL_LINEAR;
  15
  16
  17 static mempool_t *texturemempool;
  18
  19 // note: this must not conflict with TEXF_ flags in r_textures.h
  20 // cleared when a texture is uploaded
  21 #define GLTEXF_UPLOAD 0x00010000
  22 // bitmask for mismatch checking
  23 #define GLTEXF_IMPORTANTBITS (0)
  24 // set when image is uploaded and freed
  25 #define GLTEXF_DESTROYED 0x00040000
  26
  27 typedef struct textypeinfo_s
  28 {
  29         int textype;
  30         int inputbytesperpixel;
  31         int internalbytesperpixel;
  32         int glformat;
  33         int glinternalformat;
  34 }
  35 textypeinfo_t;
  36
  37 static textypeinfo_t textype_palette       = {TEXTYPE_PALETTE, 1, 4, GL_RGBA   , 3};
  38 static textypeinfo_t textype_rgb           = {TEXTYPE_RGB    , 3, 3, GL_RGB    , 3};
  39 static textypeinfo_t textype_rgba          = {TEXTYPE_RGBA   , 4, 4, GL_RGBA   , 3};
  40 static textypeinfo_t textype_palette_alpha = {TEXTYPE_PALETTE, 1, 4, GL_RGBA   , 4};
  41 static textypeinfo_t textype_rgba_alpha    = {TEXTYPE_RGBA   , 4, 4, GL_RGBA   , 4};
  42
  43 #define GLTEXTURETYPE_1D 0
  44 #define GLTEXTURETYPE_2D 1
  45 #define GLTEXTURETYPE_3D 2
  46 #define GLTEXTURETYPE_CUBEMAP 3
  47
  48 static int gltexturetypeenums[4] = {GL_TEXTURE_1D, GL_TEXTURE_2D, GL_TEXTURE_3D, GL_TEXTURE_CUBE_MAP_ARB};
  49 static int gltexturetypebindingenums[4] = {GL_TEXTURE_BINDING_1D, GL_TEXTURE_BINDING_2D, GL_TEXTURE_BINDING_3D, GL_TEXTURE_BINDING_CUBE_MAP_ARB};
  50 static int gltexturetypedimensions[4] = {1, 2, 3, 2};
  51 static int cubemapside[6] =
  52 {
  53         GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB,
  54         GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB,
  55         GL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB,
  56         GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB,
  57         GL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB,
  58         GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB
  59 };
  60
  61 typedef struct gltexture_s
  62 {
  63         // this field is exposed to the R_GetTexture macro, for speed reasons
  64         // (must be identical in rtexture_t)
  65         int texnum; // GL texture slot number
  66
  67         // pointer to texturepool (check this to see if the texture is allocated)
  68         struct gltexturepool_s *pool;
  69         // pointer to next texture in texturepool chain
  70         struct gltexture_s *chain;
  71         // name of the texture (this might be removed someday), no duplicates
  72         char identifier[32];
  73         // original data size in *inputtexels
  74         int inputwidth, inputheight, inputdepth;
  75         // copy of the original texture(s) supplied to the upload function, for
  76         // delayed uploads (non-precached)
  77         unsigned char *inputtexels;
  78         // original data size in *inputtexels
  79         int inputdatasize;
  80         // flags supplied to the LoadTexture function
  81         // (might be altered to remove TEXF_ALPHA), and GLTEXF_ private flags
  82         int flags;
  83         // pointer to one of the textype_ structs
  84         textypeinfo_t *textype;
  85         // one of the GLTEXTURETYPE_ values
  86         int texturetype;
  87         // palette if the texture is TEXTYPE_PALETTE
  88         const unsigned int *palette;
  89         // power of 2 size, after gl_picmip and gl_max_size are applied
  90         int tilewidth, tileheight, tiledepth;
  91         // 1 or 6 depending on texturetype
  92         int sides;
  93         // bytes per pixel
  94         int bytesperpixel;
  95         // GL_RGB or GL_RGBA
  96         int glformat;
  97         // 3 or 4
  98         int glinternalformat;
  99 }
 100 gltexture_t;
 101
 102 #define TEXTUREPOOL_SENTINEL 0xC0DEDBAD
 103
 104 typedef struct gltexturepool_s
 105 {
 106         unsigned int sentinel;
 107         struct gltexture_s *gltchain;
 108         struct gltexturepool_s *next;
 109 }
 110 gltexturepool_t;
 111
 112 static gltexturepool_t *gltexturepoolchain = NULL;
 113
 114 static unsigned char *resizebuffer = NULL, *colorconvertbuffer;
 115 static int resizebuffersize = 0;
 116 static unsigned char *texturebuffer;
 117 static int texturebuffersize = 0;
 118
 119 static textypeinfo_t *R_GetTexTypeInfo(int textype, int flags)
 120 {
 121         if (flags & TEXF_ALPHA)
 122         {
 123                 switch(textype)
 124                 {
 125                 case TEXTYPE_PALETTE:
 126                         return &textype_palette_alpha;
 127                 case TEXTYPE_RGB:
 128                         Host_Error("R_GetTexTypeInfo: RGB format has no alpha, TEXF_ALPHA not allowed");
 129                         return NULL;
 130                 case TEXTYPE_RGBA:
 131                         return &textype_rgba_alpha;
 132                 default:
 133                         Host_Error("R_GetTexTypeInfo: unknown texture format");
 134                         return NULL;
 135                 }
 136         }
 137         else
 138         {
 139                 switch(textype)
 140                 {
 141                 case TEXTYPE_PALETTE:
 142                         return &textype_palette;
 143                 case TEXTYPE_RGB:
 144                         return &textype_rgb;
 145                 case TEXTYPE_RGBA:
 146                         return &textype_rgba;
 147                 default:
 148                         Host_Error("R_GetTexTypeInfo: unknown texture format");
 149                         return NULL;
 150                 }
 151         }
 152 }
 153
 154 static void R_UploadTexture(gltexture_t *t);
 155
 156 static void R_PrecacheTexture(gltexture_t *glt)
 157 {
 158         int precache;
 159         precache = false;
 160         if (glt->flags & TEXF_ALWAYSPRECACHE)
 161                 precache = true;
 162         else if (r_precachetextures.integer >= 2)
 163                 precache = true;
 164         else if (r_precachetextures.integer >= 1)
 165                 if (glt->flags & TEXF_PRECACHE)
 166                         precache = true;
 167
 168         if (precache)
 169                 R_UploadTexture(glt);
 170 }
 171
 172 int R_RealGetTexture(rtexture_t *rt)
 173 {
 174         if (rt)
 175         {
 176                 gltexture_t *glt;
 177                 glt = (gltexture_t *)rt;
 178                 if (glt->flags & GLTEXF_UPLOAD)
 179                         R_UploadTexture(glt);
 180                 return glt->texnum;
 181         }
 182         else
 183                 return 0;
 184 }
 185
 186 void R_FreeTexture(rtexture_t *rt)
 187 {
 188         gltexture_t *glt, **gltpointer;
 189
 190         glt = (gltexture_t *)rt;
 191         if (glt == NULL)
 192                 Host_Error("R_FreeTexture: texture == NULL");
 193
 194         for (gltpointer = &glt->pool->gltchain;*gltpointer && *gltpointer != glt;gltpointer = &(*gltpointer)->chain);
 195         if (*gltpointer == glt)
 196                 *gltpointer = glt->chain;
 197         else
 198                 Host_Error("R_FreeTexture: texture \"%s\" not linked in pool", glt->identifier);
 199
 200         if (glt->texnum)
 201         {
 202                 CHECKGLERROR
 203                 qglDeleteTextures(1, (GLuint *)&glt->texnum);CHECKGLERROR
 204         }
 205
 206         if (glt->inputtexels)
 207                 Mem_Free(glt->inputtexels);
 208         Mem_Free(glt);
 209 }
 210
 211 rtexturepool_t *R_AllocTexturePool(void)
 212 {
 213         gltexturepool_t *pool;
 214         if (texturemempool == NULL)
 215                 return NULL;
 216         pool = (gltexturepool_t *)Mem_Alloc(texturemempool, sizeof(gltexturepool_t));
 217         if (pool == NULL)
 218                 return NULL;
 219         pool->next = gltexturepoolchain;
 220         gltexturepoolchain = pool;
 221         pool->sentinel = TEXTUREPOOL_SENTINEL;
 222         return (rtexturepool_t *)pool;
 223 }
 224
 225 void R_FreeTexturePool(rtexturepool_t **rtexturepool)
 226 {
 227         gltexturepool_t *pool, **poolpointer;
 228         if (rtexturepool == NULL)
 229                 return;
 230         if (*rtexturepool == NULL)
 231                 return;
 232         pool = (gltexturepool_t *)(*rtexturepool);
 233         *rtexturepool = NULL;
 234         if (pool->sentinel != TEXTUREPOOL_SENTINEL)
 235                 Host_Error("R_FreeTexturePool: pool already freed");
 236         for (poolpointer = &gltexturepoolchain;*poolpointer && *poolpointer != pool;poolpointer = &(*poolpointer)->next);
 237         if (*poolpointer == pool)
 238                 *poolpointer = pool->next;
 239         else
 240                 Host_Error("R_FreeTexturePool: pool not linked");
 241         while (pool->gltchain)
 242                 R_FreeTexture((rtexture_t *)pool->gltchain);
 243         Mem_Free(pool);
 244 }
 245
 246
 247 typedef struct glmode_s
 248 {
 249         char *name;
 250         int minification, magnification;
 251 }
 252 glmode_t;
 253
 254 static glmode_t modes[6] =
 255 {
 256         {"GL_NEAREST", GL_NEAREST, GL_NEAREST},
 257         {"GL_LINEAR", GL_LINEAR, GL_LINEAR},
 258         {"GL_NEAREST_MIPMAP_NEAREST", GL_NEAREST_MIPMAP_NEAREST, GL_NEAREST},
 259         {"GL_LINEAR_MIPMAP_NEAREST", GL_LINEAR_MIPMAP_NEAREST, GL_LINEAR},
 260         {"GL_NEAREST_MIPMAP_LINEAR", GL_NEAREST_MIPMAP_LINEAR, GL_NEAREST},
 261         {"GL_LINEAR_MIPMAP_LINEAR", GL_LINEAR_MIPMAP_LINEAR, GL_LINEAR}
 262 };
 263
 264 static void GL_TextureMode_f (void)
 265 {
 266         int i;
 267         GLint oldbindtexnum;
 268         gltexture_t *glt;
 269         gltexturepool_t *pool;
 270
 271         if (Cmd_Argc() == 1)
 272         {
 273                 for (i = 0;i < 6;i++)
 274                 {
 275                         if (gl_filter_min == modes[i].minification)
 276                         {
 277                                 Con_Printf("%s\n", modes[i].name);
 278                                 return;
 279                         }
 280                 }
 281                 Con_Print("current filter is unknown???\n");
 282                 return;
 283         }
 284
 285         for (i = 0;i < 6;i++)
 286                 if (!strcasecmp (modes[i].name, Cmd_Argv(1) ) )
 287                         break;
 288         if (i == 6)
 289         {
 290                 Con_Print("bad filter name\n");
 291                 return;
 292         }
 293
 294         gl_filter_min = modes[i].minification;
 295         gl_filter_mag = modes[i].magnification;
 296
 297         // change all the existing mipmap texture objects
 298         // FIXME: force renderer(/client/something?) restart instead?
 299         CHECKGLERROR
 300         for (pool = gltexturepoolchain;pool;pool = pool->next)
 301         {
 302                 for (glt = pool->gltchain;glt;glt = glt->chain)
 303                 {
 304                         // only update already uploaded images
 305                         if (!(glt->flags & (GLTEXF_UPLOAD | TEXF_FORCENEAREST | TEXF_FORCELINEAR)))
 306                         {
 307                                 qglGetIntegerv(gltexturetypebindingenums[glt->texturetype], &oldbindtexnum);CHECKGLERROR
 308                                 qglBindTexture(gltexturetypeenums[glt->texturetype], glt->texnum);CHECKGLERROR
 309                                 if (glt->flags & TEXF_MIPMAP)
 310                                 {
 311                                         qglTexParameteri(gltexturetypeenums[glt->texturetype], GL_TEXTURE_MIN_FILTER, gl_filter_min);CHECKGLERROR
 312                                 }
 313                                 else
 314                                 {
 315                                         qglTexParameteri(gltexturetypeenums[glt->texturetype], GL_TEXTURE_MIN_FILTER, gl_filter_mag);CHECKGLERROR
 316                                 }
 317                                 qglTexParameteri(gltexturetypeenums[glt->texturetype], GL_TEXTURE_MAG_FILTER, gl_filter_mag);CHECKGLERROR
 318                                 qglBindTexture(gltexturetypeenums[glt->texturetype], oldbindtexnum);CHECKGLERROR
 319                         }
 320                 }
 321         }
 322 }
 323
 324 static void GL_Texture_CalcImageSize(int texturetype, int flags, int inwidth, int inheight, int indepth, int *outwidth, int *outheight, int *outdepth)
 325 {
 326         int picmip = 0, maxsize = 0, width2 = 1, height2 = 1, depth2 = 1;
 327
 328         if (gl_max_size.integer > gl_max_texture_size)
 329                 Cvar_SetValue("gl_max_size", gl_max_texture_size);
 330
 331         switch (texturetype)
 332         {
 333         default:
 334         case GLTEXTURETYPE_1D:
 335         case GLTEXTURETYPE_2D:
 336                 maxsize = gl_max_texture_size;
 337                 break;
 338         case GLTEXTURETYPE_3D:
 339                 maxsize = gl_max_3d_texture_size;
 340                 break;
 341         case GLTEXTURETYPE_CUBEMAP:
 342                 maxsize = gl_max_cube_map_texture_size;
 343                 break;
 344         }
 345
 346         if (flags & TEXF_PICMIP)
 347         {
 348                 maxsize = min(maxsize, gl_max_size.integer);
 349                 picmip = gl_picmip.integer;
 350         }
 351
 352         if (outwidth)
 353         {
 354                 for (width2 = 1;width2 < inwidth;width2 <<= 1);
 355                 for (width2 >>= picmip;width2 > maxsize;width2 >>= 1);
 356                 *outwidth = max(1, width2);
 357         }
 358         if (outheight)
 359         {
 360                 for (height2 = 1;height2 < inheight;height2 <<= 1);
 361                 for (height2 >>= picmip;height2 > maxsize;height2 >>= 1);
 362                 *outheight = max(1, height2);
 363         }
 364         if (outdepth)
 365         {
 366                 for (depth2 = 1;depth2 < indepth;depth2 <<= 1);
 367                 for (depth2 >>= picmip;depth2 > maxsize;depth2 >>= 1);
 368                 *outdepth = max(1, depth2);
 369         }
 370 }
 371
 372
 373 static int R_CalcTexelDataSize (gltexture_t *glt)
 374 {
 375         int width2, height2, depth2, size;
 376
 377         GL_Texture_CalcImageSize(glt->texturetype, glt->flags, glt->inputwidth, glt->inputheight, glt->inputdepth, &width2, &height2, &depth2);
 378
 379         size = width2 * height2 * depth2;
 380
 381         if (glt->flags & TEXF_MIPMAP)
 382         {
 383                 while (width2 > 1 || height2 > 1 || depth2 > 1)
 384                 {
 385                         if (width2 > 1)
 386                                 width2 >>= 1;
 387                         if (height2 > 1)
 388                                 height2 >>= 1;
 389                         if (depth2 > 1)
 390                                 depth2 >>= 1;
 391                         size += width2 * height2 * depth2;
 392                 }
 393         }
 394
 395         return size * glt->textype->internalbytesperpixel * glt->sides;
 396 }
 397
 398 void R_TextureStats_Print(qboolean printeach, qboolean printpool, qboolean printtotal)
 399 {
 400         int glsize;
 401         int isloaded;
 402         int pooltotal = 0, pooltotalt = 0, pooltotalp = 0, poolloaded = 0, poolloadedt = 0, poolloadedp = 0;
 403         int sumtotal = 0, sumtotalt = 0, sumtotalp = 0, sumloaded = 0, sumloadedt = 0, sumloadedp = 0;
 404         gltexture_t *glt;
 405         gltexturepool_t *pool;
 406         if (printeach)
 407                 Con_Print("glsize input loaded mip alpha name\n");
 408         for (pool = gltexturepoolchain;pool;pool = pool->next)
 409         {
 410                 pooltotal = 0;
 411                 pooltotalt = 0;
 412                 pooltotalp = 0;
 413                 poolloaded = 0;
 414                 poolloadedt = 0;
 415                 poolloadedp = 0;
 416                 for (glt = pool->gltchain;glt;glt = glt->chain)
 417                 {
 418                         glsize = R_CalcTexelDataSize(glt);
 419                         isloaded = !(glt->flags & GLTEXF_UPLOAD);
 420                         pooltotal++;
 421                         pooltotalt += glsize;
 422                         pooltotalp += glt->inputdatasize;
 423                         if (isloaded)
 424                         {
 425                                 poolloaded++;
 426                                 poolloadedt += glsize;
 427                                 poolloadedp += glt->inputdatasize;
 428                         }
 429                         if (printeach)
 430                                 Con_Printf("%c%4i%c%c%4i%c %s %s %s %s\n", isloaded ? '[' : ' ', (glsize + 1023) / 1024, isloaded ? ']' : ' ', glt->inputtexels ? '[' : ' ', (glt->inputdatasize + 1023) / 1024, glt->inputtexels ? ']' : ' ', isloaded ? "loaded" : "      ", (glt->flags & TEXF_MIPMAP) ? "mip" : "   ", (glt->flags & TEXF_ALPHA) ? "alpha" : "     ", glt->identifier);
 431                 }
 432                 if (printpool)
 433                         Con_Printf("texturepool %10p total: %i (%.3fMB, %.3fMB original), uploaded %i (%.3fMB, %.3fMB original), upload on demand %i (%.3fMB, %.3fMB original)\n", pool, pooltotal, pooltotalt / 1048576.0, pooltotalp / 1048576.0, poolloaded, poolloadedt / 1048576.0, poolloadedp / 1048576.0, pooltotal - poolloaded, (pooltotalt - poolloadedt) / 1048576.0, (pooltotalp - poolloadedp) / 1048576.0);
 434                 sumtotal += pooltotal;
 435                 sumtotalt += pooltotalt;
 436                 sumtotalp += pooltotalp;
 437                 sumloaded += poolloaded;
 438                 sumloadedt += poolloadedt;
 439                 sumloadedp += poolloadedp;
 440         }
 441         if (printtotal)
 442                 Con_Printf("textures total: %i (%.3fMB, %.3fMB original), uploaded %i (%.3fMB, %.3fMB original), upload on demand %i (%.3fMB, %.3fMB original)\n", sumtotal, sumtotalt / 1048576.0, sumtotalp / 1048576.0, sumloaded, sumloadedt / 1048576.0, sumloadedp / 1048576.0, sumtotal - sumloaded, (sumtotalt - sumloadedt) / 1048576.0, (sumtotalp - sumloadedp) / 1048576.0);
 443 }
 444
 445 static void R_TextureStats_f(void)
 446 {
 447         R_TextureStats_Print(true, true, true);
 448 }
 449
 450 static void r_textures_start(void)
 451 {
 452         // LordHavoc: allow any alignment
 453         CHECKGLERROR
 454         qglPixelStorei(GL_UNPACK_ALIGNMENT, 1);CHECKGLERROR
 455
 456         texturemempool = Mem_AllocPool("texture management", 0, NULL);
 457
 458         // Disable JPEG screenshots if the DLL isn't loaded
 459         if (! JPEG_OpenLibrary ())
 460                 Cvar_SetValueQuick (&scr_screenshot_jpeg, 0);
 461         // TODO: support png screenshots?
 462         PNG_OpenLibrary ();
 463 }
 464
 465 static void r_textures_shutdown(void)
 466 {
 467         rtexturepool_t *temp;
 468
 469         JPEG_CloseLibrary ();
 470
 471         while(gltexturepoolchain)
 472         {
 473                 temp = (rtexturepool_t *) gltexturepoolchain;
 474                 R_FreeTexturePool(&temp);
 475         }
 476
 477         resizebuffersize = 0;
 478         texturebuffersize = 0;
 479         resizebuffer = NULL;
 480         colorconvertbuffer = NULL;
 481         texturebuffer = NULL;
 482         Mem_FreePool(&texturemempool);
 483 }
 484
 485 static void r_textures_newmap(void)
 486 {
 487 }
 488
 489 void R_Textures_Init (void)
 490 {
 491         Cmd_AddCommand("gl_texturemode", &GL_TextureMode_f, "set texture filtering mode (GL_NEAREST, GL_LINEAR, GL_LINEAR_MIPMAP_LINEAR, etc)");
 492         Cmd_AddCommand("r_texturestats", R_TextureStats_f, "print information about all loaded textures and some statistics");
 493         Cvar_RegisterVariable (&gl_max_size);
 494         Cvar_RegisterVariable (&gl_picmip);
 495         Cvar_RegisterVariable (&r_lerpimages);
 496         Cvar_RegisterVariable (&r_precachetextures);
 497         Cvar_RegisterVariable (&gl_texture_anisotropy);
 498
 499         R_RegisterModule("R_Textures", r_textures_start, r_textures_shutdown, r_textures_newmap);
 500 }
 501
 502 void R_Textures_Frame (void)
 503 {
 504         static int old_aniso = 0;
 505
 506         // could do procedural texture animation here, if we keep track of which
 507         // textures were accessed this frame...
 508
 509         // free the resize buffers
 510         resizebuffersize = 0;
 511         if (resizebuffer)
 512         {
 513                 Mem_Free(resizebuffer);
 514                 resizebuffer = NULL;
 515         }
 516         if (colorconvertbuffer)
 517         {
 518                 Mem_Free(colorconvertbuffer);
 519                 colorconvertbuffer = NULL;
 520         }
 521
 522         if (old_aniso != gl_texture_anisotropy.integer)
 523         {
 524                 gltexture_t *glt;
 525                 gltexturepool_t *pool;
 526                 GLint oldbindtexnum;
 527
 528                 old_aniso = bound(1, gl_texture_anisotropy.integer, gl_max_anisotropy);
 529
 530                 Cvar_SetValueQuick(&gl_texture_anisotropy, old_aniso);
 531
 532                 CHECKGLERROR
 533                 for (pool = gltexturepoolchain;pool;pool = pool->next)
 534                 {
 535                         for (glt = pool->gltchain;glt;glt = glt->chain)
 536                         {
 537                                 // only update already uploaded images
 538                                 if ((glt->flags & (GLTEXF_UPLOAD | TEXF_MIPMAP)) == TEXF_MIPMAP)
 539                                 {
 540                                         qglGetIntegerv(gltexturetypebindingenums[glt->texturetype], &oldbindtexnum);CHECKGLERROR
 541
 542                                         qglBindTexture(gltexturetypeenums[glt->texturetype], glt->texnum);CHECKGLERROR
 543                                         qglTexParameteri(gltexturetypeenums[glt->texturetype], GL_TEXTURE_MAX_ANISOTROPY_EXT, old_aniso);CHECKGLERROR
 544
 545                                         qglBindTexture(gltexturetypeenums[glt->texturetype], oldbindtexnum);CHECKGLERROR
 546                                 }
 547                         }
 548                 }
 549         }
 550 }
 551
 552 void R_MakeResizeBufferBigger(int size)
 553 {
 554         if (resizebuffersize < size)
 555         {
 556                 resizebuffersize = size;
 557                 if (resizebuffer)
 558                         Mem_Free(resizebuffer);
 559                 if (colorconvertbuffer)
 560                         Mem_Free(colorconvertbuffer);
 561                 resizebuffer = (unsigned char *)Mem_Alloc(texturemempool, resizebuffersize);
 562                 colorconvertbuffer = (unsigned char *)Mem_Alloc(texturemempool, resizebuffersize);
 563                 if (!resizebuffer || !colorconvertbuffer)
 564                         Host_Error("R_Upload: out of memory");
 565         }
 566 }
 567
 568 static void GL_SetupTextureParameters(int flags, int texturetype)
 569 {
 570         int textureenum = gltexturetypeenums[texturetype];
 571         int wrapmode = ((flags & TEXF_CLAMP) && gl_support_clamptoedge) ? GL_CLAMP_TO_EDGE : GL_REPEAT;
 572
 573         CHECKGLERROR
 574
 575         if (gl_support_anisotropy && (flags & TEXF_MIPMAP))
 576         {
 577                 int aniso = bound(1, gl_texture_anisotropy.integer, gl_max_anisotropy);
 578                 if (gl_texture_anisotropy.integer != aniso)
 579                         Cvar_SetValueQuick(&gl_texture_anisotropy, aniso);
 580                 qglTexParameteri(textureenum, GL_TEXTURE_MAX_ANISOTROPY_EXT, aniso);CHECKGLERROR
 581         }
 582         qglTexParameteri(textureenum, GL_TEXTURE_WRAP_S, wrapmode);CHECKGLERROR
 583         qglTexParameteri(textureenum, GL_TEXTURE_WRAP_T, wrapmode);CHECKGLERROR
 584         if (gltexturetypedimensions[texturetype] >= 3)
 585         {
 586                 qglTexParameteri(textureenum, GL_TEXTURE_WRAP_R, wrapmode);CHECKGLERROR
 587         }
 588
 589         CHECKGLERROR
 590         if (flags & TEXF_FORCENEAREST)
 591         {
 592                 if (flags & TEXF_MIPMAP)
 593                 {
 594                         qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, GL_NEAREST_MIPMAP_NEAREST);CHECKGLERROR
 595                 }
 596                 else
 597                 {
 598                         qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, GL_NEAREST);CHECKGLERROR
 599                 }
 600                 qglTexParameteri(textureenum, GL_TEXTURE_MAG_FILTER, GL_NEAREST);CHECKGLERROR
 601         }
 602         else if (flags & TEXF_FORCELINEAR)
 603         {
 604                 if (flags & TEXF_MIPMAP)
 605                 {
 606                         if (gl_filter_min == GL_NEAREST_MIPMAP_LINEAR || gl_filter_min == GL_LINEAR_MIPMAP_LINEAR)
 607                         {
 608                                 qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);CHECKGLERROR
 609                         }
 610                         else
 611                         {
 612                                 qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_NEAREST);CHECKGLERROR
 613                         }
 614                 }
 615                 else
 616                 {
 617                         qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, GL_LINEAR);CHECKGLERROR
 618                 }
 619                 qglTexParameteri(textureenum, GL_TEXTURE_MAG_FILTER, GL_LINEAR);CHECKGLERROR
 620         }
 621         else
 622         {
 623                 if (flags & TEXF_MIPMAP)
 624                 {
 625                         qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, gl_filter_min);CHECKGLERROR
 626                 }
 627                 else
 628                 {
 629                         qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, gl_filter_mag);CHECKGLERROR
 630                 }
 631                 qglTexParameteri(textureenum, GL_TEXTURE_MAG_FILTER, gl_filter_mag);CHECKGLERROR
 632         }
 633
 634         CHECKGLERROR
 635 }
 636
 637 static void R_Upload(gltexture_t *glt, unsigned char *data, int fragx, int fragy, int fragz, int fragwidth, int fragheight, int fragdepth)
 638 {
 639         int i, mip, width, height, depth;
 640         GLint oldbindtexnum;
 641         unsigned char *prevbuffer;
 642         prevbuffer = data;
 643
 644         CHECKGLERROR
 645
 646         // we need to restore the texture binding after finishing the upload
 647         qglGetIntegerv(gltexturetypebindingenums[glt->texturetype], &oldbindtexnum);CHECKGLERROR
 648         qglBindTexture(gltexturetypeenums[glt->texturetype], glt->texnum);CHECKGLERROR
 649
 650         // these are rounded up versions of the size to do better resampling
 651         for (width  = 1;width  < glt->inputwidth ;width  <<= 1);
 652         for (height = 1;height < glt->inputheight;height <<= 1);
 653         for (depth  = 1;depth  < glt->inputdepth ;depth  <<= 1);
 654
 655         R_MakeResizeBufferBigger(width * height * depth * glt->sides * glt->bytesperpixel);
 656         R_MakeResizeBufferBigger(fragwidth * fragheight * fragdepth * glt->sides * glt->bytesperpixel);
 657
 658         if (prevbuffer == NULL)
 659         {
 660                 memset(resizebuffer, 0, fragwidth * fragheight * fragdepth * glt->bytesperpixel);
 661                 prevbuffer = resizebuffer;
 662         }
 663         else if (glt->textype->textype == TEXTYPE_PALETTE)
 664         {
 665                 // promote paletted to RGBA, so we only have to worry about RGB and
 666                 // RGBA in the rest of this code
 667                 Image_Copy8bitRGBA(prevbuffer, colorconvertbuffer, fragwidth * fragheight * fragdepth * glt->sides, glt->palette);
 668                 prevbuffer = colorconvertbuffer;
 669         }
 670
 671         if ((glt->flags & (TEXF_MIPMAP | TEXF_PICMIP | GLTEXF_UPLOAD)) == 0 && glt->inputwidth == glt->tilewidth && glt->inputheight == glt->tileheight && glt->inputdepth == glt->tiledepth)
 672         {
 673                 // update a portion of the image
 674                 switch(glt->texturetype)
 675                 {
 676                 case GLTEXTURETYPE_1D:
 677                         qglTexSubImage1D(GL_TEXTURE_1D, 0, fragx, fragwidth, glt->glformat, GL_UNSIGNED_BYTE, prevbuffer);CHECKGLERROR
 678                         break;
 679                 case GLTEXTURETYPE_2D:
 680                         qglTexSubImage2D(GL_TEXTURE_2D, 0, fragx, fragy, fragwidth, fragheight, glt->glformat, GL_UNSIGNED_BYTE, prevbuffer);CHECKGLERROR
 681                         break;
 682                 case GLTEXTURETYPE_3D:
 683                         qglTexSubImage3D(GL_TEXTURE_3D, 0, fragx, fragy, fragz, fragwidth, fragheight, fragdepth, glt->glformat, GL_UNSIGNED_BYTE, prevbuffer);CHECKGLERROR
 684                         break;
 685                 default:
 686                         Host_Error("R_Upload: partial update of type other than 1D, 2D, or 3D");
 687                         break;
 688                 }
 689         }
 690         else
 691         {
 692                 if (fragx || fragy || fragz || glt->inputwidth != fragwidth || glt->inputheight != fragheight || glt->inputdepth != fragdepth)
 693                         Host_Error("R_Upload: partial update not allowed on initial upload or in combination with PICMIP or MIPMAP\n");
 694
 695                 // upload the image for the first time
 696                 glt->flags &= ~GLTEXF_UPLOAD;
 697
 698                 // cubemaps contain multiple images and thus get processed a bit differently
 699                 if (glt->texturetype != GLTEXTURETYPE_CUBEMAP)
 700                 {
 701                         if (glt->inputwidth != width || glt->inputheight != height || glt->inputdepth != depth)
 702                         {
 703                                 Image_Resample(prevbuffer, glt->inputwidth, glt->inputheight, glt->inputdepth, resizebuffer, width, height, depth, glt->bytesperpixel, r_lerpimages.integer);
 704                                 prevbuffer = resizebuffer;
 705                         }
 706                         // picmip/max_size
 707                         while (width > glt->tilewidth || height > glt->tileheight || depth > glt->tiledepth)
 708                         {
 709                                 Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, glt->tilewidth, glt->tileheight, glt->tiledepth, glt->bytesperpixel);
 710                                 prevbuffer = resizebuffer;
 711                         }
 712                 }
 713                 mip = 0;
 714                 switch(glt->texturetype)
 715                 {
 716                 case GLTEXTURETYPE_1D:
 717                         qglTexImage1D(GL_TEXTURE_1D, mip++, glt->glinternalformat, width, 0, glt->glformat, GL_UNSIGNED_BYTE, prevbuffer);CHECKGLERROR
 718                         if (glt->flags & TEXF_MIPMAP)
 719                         {
 720                                 while (width > 1 || height > 1 || depth > 1)
 721                                 {
 722                                         Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1, glt->bytesperpixel);
 723                                         prevbuffer = resizebuffer;
 724                                         qglTexImage1D(GL_TEXTURE_1D, mip++, glt->glinternalformat, width, 0, glt->glformat, GL_UNSIGNED_BYTE, prevbuffer);CHECKGLERROR
 725                                 }
 726                         }
 727                         break;
 728                 case GLTEXTURETYPE_2D:
 729                         qglTexImage2D(GL_TEXTURE_2D, mip++, glt->glinternalformat, width, height, 0, glt->glformat, GL_UNSIGNED_BYTE, prevbuffer);CHECKGLERROR
 730                         if (glt->flags & TEXF_MIPMAP)
 731                         {
 732                                 while (width > 1 || height > 1 || depth > 1)
 733                                 {
 734                                         Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1, glt->bytesperpixel);
 735                                         prevbuffer = resizebuffer;
 736                                         qglTexImage2D(GL_TEXTURE_2D, mip++, glt->glinternalformat, width, height, 0, glt->glformat, GL_UNSIGNED_BYTE, prevbuffer);CHECKGLERROR
 737                                 }
 738                         }
 739                         break;
 740                 case GLTEXTURETYPE_3D:
 741                         qglTexImage3D(GL_TEXTURE_3D, mip++, glt->glinternalformat, width, height, depth, 0, glt->glformat, GL_UNSIGNED_BYTE, prevbuffer);CHECKGLERROR
 742                         if (glt->flags & TEXF_MIPMAP)
 743                         {
 744                                 while (width > 1 || height > 1 || depth > 1)
 745                                 {
 746                                         Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1, glt->bytesperpixel);
 747                                         prevbuffer = resizebuffer;
 748                                         qglTexImage3D(GL_TEXTURE_3D, mip++, glt->glinternalformat, width, height, depth, 0, glt->glformat, GL_UNSIGNED_BYTE, prevbuffer);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 += glt->inputwidth * glt->inputheight * glt->inputdepth * glt->textype->inputbytesperpixel;
 760                                 if (glt->inputwidth != width || glt->inputheight != height || glt->inputdepth != depth)
 761                                 {
 762                                         Image_Resample(prevbuffer, glt->inputwidth, glt->inputheight, glt->inputdepth, resizebuffer, width, height, depth, glt->bytesperpixel, r_lerpimages.integer);
 763                                         prevbuffer = resizebuffer;
 764                                 }
 765                                 // picmip/max_size
 766                                 while (width > glt->tilewidth || height > glt->tileheight || depth > glt->tiledepth)
 767                                 {
 768                                         Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, glt->tilewidth, glt->tileheight, glt->tiledepth, glt->bytesperpixel);
 769                                         prevbuffer = resizebuffer;
 770                                 }
 771                                 mip = 0;
 772                                 qglTexImage2D(cubemapside[i], mip++, glt->glinternalformat, width, height, 0, glt->glformat, GL_UNSIGNED_BYTE, prevbuffer);CHECKGLERROR
 773                                 if (glt->flags & TEXF_MIPMAP)
 774                                 {
 775                                         while (width > 1 || height > 1 || depth > 1)
 776                                         {
 777                                                 Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1, glt->bytesperpixel);
 778                                                 prevbuffer = resizebuffer;
 779                                                 qglTexImage2D(cubemapside[i], mip++, glt->glinternalformat, width, height, 0, glt->glformat, GL_UNSIGNED_BYTE, prevbuffer);CHECKGLERROR
 780                                         }
 781                                 }
 782                         }
 783                         break;
 784                 }
 785                 GL_SetupTextureParameters(glt->flags, glt->texturetype);
 786         }
 787         qglBindTexture(gltexturetypeenums[glt->texturetype], oldbindtexnum);CHECKGLERROR
 788 }
 789
 790 static void R_UploadTexture (gltexture_t *glt)
 791 {
 792         if (!(glt->flags & GLTEXF_UPLOAD))
 793                 return;
 794
 795         CHECKGLERROR
 796         qglGenTextures(1, (GLuint *)&glt->texnum);CHECKGLERROR
 797         R_Upload(glt, glt->inputtexels, 0, 0, 0, glt->inputwidth, glt->inputheight, glt->inputdepth);
 798         if (glt->inputtexels)
 799         {
 800                 Mem_Free(glt->inputtexels);
 801                 glt->inputtexels = NULL;
 802                 glt->flags |= GLTEXF_DESTROYED;
 803         }
 804         else if (glt->flags & GLTEXF_DESTROYED)
 805                 Con_Printf("R_UploadTexture: Texture %s already uploaded and destroyed.  Can not upload original image again.  Uploaded blank texture.\n", glt->identifier);
 806 }
 807
 808 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 unsigned char *data, const unsigned int *palette)
 809 {
 810         int i, size;
 811         gltexture_t *glt;
 812         gltexturepool_t *pool = (gltexturepool_t *)rtexturepool;
 813         textypeinfo_t *texinfo;
 814
 815         if (cls.state == ca_dedicated)
 816                 return NULL;
 817
 818         if (texturetype == GLTEXTURETYPE_CUBEMAP && !gl_texturecubemap)
 819         {
 820                 Con_Printf ("R_LoadTexture: cubemap texture not supported by driver\n");
 821                 return NULL;
 822         }
 823         if (texturetype == GLTEXTURETYPE_3D && !gl_texture3d)
 824         {
 825                 Con_Printf ("R_LoadTexture: 3d texture not supported by driver\n");
 826                 return NULL;
 827         }
 828
 829         texinfo = R_GetTexTypeInfo(textype, flags);
 830         size = width * height * depth * sides * texinfo->inputbytesperpixel;
 831         if (size < 1)
 832         {
 833                 Con_Printf ("R_LoadTexture: bogus texture size (%dx%dx%dx%dbppx%dsides = %d bytes)\n", width, height, depth, texinfo->inputbytesperpixel * 8, sides);
 834                 return NULL;
 835         }
 836
 837         // clear the alpha flag if the texture has no transparent pixels
 838         switch(textype)
 839         {
 840         case TEXTYPE_PALETTE:
 841                 if (flags & TEXF_ALPHA)
 842                 {
 843                         flags &= ~TEXF_ALPHA;
 844                         if (data)
 845                         {
 846                                 for (i = 0;i < size;i++)
 847                                 {
 848                                         if (((unsigned char *)&palette[data[i]])[3] < 255)
 849                                         {
 850                                                 flags |= TEXF_ALPHA;
 851                                                 break;
 852                                         }
 853                                 }
 854                         }
 855                 }
 856                 break;
 857         case TEXTYPE_RGB:
 858                 if (flags & TEXF_ALPHA)
 859                         Host_Error("R_LoadTexture: RGB has no alpha, don't specify TEXF_ALPHA");
 860                 break;
 861         case TEXTYPE_RGBA:
 862                 if (flags & TEXF_ALPHA)
 863                 {
 864                         flags &= ~TEXF_ALPHA;
 865                         if (data)
 866                         {
 867                                 for (i = 3;i < size;i += 4)
 868                                 {
 869                                         if (data[i] < 255)
 870                                         {
 871                                                 flags |= TEXF_ALPHA;
 872                                                 break;
 873                                         }
 874                                 }
 875                         }
 876                 }
 877                 break;
 878         default:
 879                 Host_Error("R_LoadTexture: unknown texture type");
 880         }
 881
 882         glt = (gltexture_t *)Mem_Alloc(texturemempool, sizeof(gltexture_t));
 883         if (identifier)
 884                 strlcpy (glt->identifier, identifier, sizeof(glt->identifier));
 885         glt->pool = pool;
 886         glt->chain = pool->gltchain;
 887         pool->gltchain = glt;
 888         glt->inputwidth = width;
 889         glt->inputheight = height;
 890         glt->inputdepth = depth;
 891         glt->flags = flags | GLTEXF_UPLOAD;
 892         glt->textype = texinfo;
 893         glt->texturetype = texturetype;
 894         glt->inputdatasize = size;
 895         glt->palette = palette;
 896         glt->glinternalformat = texinfo->glinternalformat;
 897         glt->glformat = texinfo->glformat;
 898         glt->bytesperpixel = texinfo->internalbytesperpixel;
 899         glt->sides = glt->texturetype == GLTEXTURETYPE_CUBEMAP ? 6 : 1;
 900         glt->texnum = -1;
 901
 902         if (data)
 903         {
 904                 glt->inputtexels = (unsigned char *)Mem_Alloc(texturemempool, size);
 905                 memcpy(glt->inputtexels, data, size);
 906         }
 907         else
 908                 glt->inputtexels = NULL;
 909
 910         GL_Texture_CalcImageSize(glt->texturetype, glt->flags, glt->inputwidth, glt->inputheight, glt->inputdepth, &glt->tilewidth, &glt->tileheight, &glt->tiledepth);
 911         R_PrecacheTexture(glt);
 912
 913         return (rtexture_t *)glt;
 914 }
 915
 916 rtexture_t *R_LoadTexture1D(rtexturepool_t *rtexturepool, const char *identifier, int width, const unsigned char *data, int textype, int flags, const unsigned int *palette)
 917 {
 918         return R_SetupTexture(rtexturepool, identifier, width, 1, 1, 1, flags, textype, GLTEXTURETYPE_1D, data, palette);
 919 }
 920
 921 rtexture_t *R_LoadTexture2D(rtexturepool_t *rtexturepool, const char *identifier, int width, int height, const unsigned char *data, int textype, int flags, const unsigned int *palette)
 922 {
 923         return R_SetupTexture(rtexturepool, identifier, width, height, 1, 1, flags, textype, GLTEXTURETYPE_2D, data, palette);
 924 }
 925
 926 rtexture_t *R_LoadTexture3D(rtexturepool_t *rtexturepool, const char *identifier, int width, int height, int depth, const unsigned char *data, int textype, int flags, const unsigned int *palette)
 927 {
 928         return R_SetupTexture(rtexturepool, identifier, width, height, depth, 1, flags, textype, GLTEXTURETYPE_3D, data, palette);
 929 }
 930
 931 rtexture_t *R_LoadTextureCubeMap(rtexturepool_t *rtexturepool, const char *identifier, int width, const unsigned char *data, int textype, int flags, const unsigned int *palette)
 932 {
 933         return R_SetupTexture(rtexturepool, identifier, width, width, 1, 6, flags, textype, GLTEXTURETYPE_CUBEMAP, data, palette);
 934 }
 935
 936 int R_TextureHasAlpha(rtexture_t *rt)
 937 {
 938         return rt ? (((gltexture_t *)rt)->flags & TEXF_ALPHA) != 0 : false;
 939 }
 940
 941 int R_TextureWidth(rtexture_t *rt)
 942 {
 943         return rt ? ((gltexture_t *)rt)->inputwidth : 0;
 944 }
 945
 946 int R_TextureHeight(rtexture_t *rt)
 947 {
 948         return rt ? ((gltexture_t *)rt)->inputheight : 0;
 949 }
 950
 951 void R_UpdateTexture(rtexture_t *rt, unsigned char *data, int x, int y, int width, int height)
 952 {
 953         gltexture_t *glt;
 954         if (rt == NULL)
 955                 Host_Error("R_UpdateTexture: no texture supplied");
 956         if (data == NULL)
 957                 Host_Error("R_UpdateTexture: no data supplied");
 958         glt = (gltexture_t *)rt;
 959
 960         // we need it to be uploaded before we can update a part of it
 961         if (glt->flags & GLTEXF_UPLOAD)
 962                 R_UploadTexture(glt);
 963
 964         // update part of the texture
 965         R_Upload(glt, data, x, y, 0, width, height, 1);
 966 }
 967