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 static textypeinfo_t textype_dsdt          = {TEXTYPE_DSDT   , 2, 2, GL_DSDT_NV, GL_DSDT8_NV};
  43
  44 #define GLTEXTURETYPE_1D 0
  45 #define GLTEXTURETYPE_2D 1
  46 #define GLTEXTURETYPE_3D 2
  47 #define GLTEXTURETYPE_CUBEMAP 3
  48
  49 static int gltexturetypeenums[4] = {GL_TEXTURE_1D, GL_TEXTURE_2D, GL_TEXTURE_3D, GL_TEXTURE_CUBE_MAP_ARB};
  50 static int gltexturetypebindingenums[4] = {GL_TEXTURE_BINDING_1D, GL_TEXTURE_BINDING_2D, GL_TEXTURE_BINDING_3D, GL_TEXTURE_BINDING_CUBE_MAP_ARB};
  51 static int gltexturetypedimensions[4] = {1, 2, 3, 2};
  52 static int cubemapside[6] =
  53 {
  54         GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB,
  55         GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB,
  56         GL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB,
  57         GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB,
  58         GL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB,
  59         GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB
  60 };
  61
  62 typedef struct gltexture_s
  63 {
  64         // this field is exposed to the R_GetTexture macro, for speed reasons
  65         // (must be identical in rtexture_t)
  66         int texnum; // GL texture slot number
  67
  68         // pointer to texturepool (check this to see if the texture is allocated)
  69         struct gltexturepool_s *pool;
  70         // pointer to next texture in texturepool chain
  71         struct gltexture_s *chain;
  72         // name of the texture (this might be removed someday), no duplicates
  73         char identifier[32];
  74         // original data size in *inputtexels
  75         int inputwidth, inputheight, inputdepth;
  76         // copy of the original texture(s) supplied to the upload function, for
  77         // delayed uploads (non-precached)
  78         unsigned char *inputtexels;
  79         // original data size in *inputtexels
  80         int inputdatasize;
  81         // flags supplied to the LoadTexture function
  82         // (might be altered to remove TEXF_ALPHA), and GLTEXF_ private flags
  83         int flags;
  84         // pointer to one of the textype_ structs
  85         textypeinfo_t *textype;
  86         // one of the GLTEXTURETYPE_ values
  87         int texturetype;
  88         // palette if the texture is TEXTYPE_PALETTE
  89         const unsigned int *palette;
  90         // power of 2 size, after gl_picmip and gl_max_size are applied
  91         int tilewidth, tileheight, tiledepth;
  92         // 1 or 6 depending on texturetype
  93         int sides;
  94         // bytes per pixel
  95         int bytesperpixel;
  96         // GL_RGB or GL_RGBA
  97         int glformat;
  98         // 3 or 4
  99         int glinternalformat;
 100 }
 101 gltexture_t;
 102
 103 #define TEXTUREPOOL_SENTINEL 0xC0DEDBAD
 104
 105 typedef struct gltexturepool_s
 106 {
 107         unsigned int sentinel;
 108         struct gltexture_s *gltchain;
 109         struct gltexturepool_s *next;
 110 }
 111 gltexturepool_t;
 112
 113 static gltexturepool_t *gltexturepoolchain = NULL;
 114
 115 static unsigned char *resizebuffer = NULL, *colorconvertbuffer;
 116 static int resizebuffersize = 0;
 117 static unsigned char *texturebuffer;
 118 static int texturebuffersize = 0;
 119
 120 static textypeinfo_t *R_GetTexTypeInfo(int textype, int flags)
 121 {
 122         if (flags & TEXF_ALPHA)
 123         {
 124                 switch(textype)
 125                 {
 126                 case TEXTYPE_PALETTE:
 127                         return &textype_palette_alpha;
 128                 case TEXTYPE_RGB:
 129                         Host_Error("R_GetTexTypeInfo: RGB format has no alpha, TEXF_ALPHA not allowed");
 130                         return NULL;
 131                 case TEXTYPE_RGBA:
 132                         return &textype_rgba_alpha;
 133                 default:
 134                         Host_Error("R_GetTexTypeInfo: unknown texture format");
 135                         return NULL;
 136                 }
 137         }
 138         else
 139         {
 140                 switch(textype)
 141                 {
 142                 case TEXTYPE_PALETTE:
 143                         return &textype_palette;
 144                 case TEXTYPE_RGB:
 145                         return &textype_rgb;
 146                 case TEXTYPE_RGBA:
 147                         return &textype_rgba;
 148                 case TEXTYPE_DSDT:
 149                         return &textype_dsdt;
 150                 default:
 151                         Host_Error("R_GetTexTypeInfo: unknown texture format");
 152                         return NULL;
 153                 }
 154         }
 155 }
 156
 157 static void R_UploadTexture(gltexture_t *t);
 158
 159 static void R_PrecacheTexture(gltexture_t *glt)
 160 {
 161         int precache;
 162         precache = false;
 163         if (glt->flags & TEXF_ALWAYSPRECACHE)
 164                 precache = true;
 165         else if (r_precachetextures.integer >= 2)
 166                 precache = true;
 167         else if (r_precachetextures.integer >= 1)
 168                 if (glt->flags & TEXF_PRECACHE)
 169                         precache = true;
 170
 171         if (precache)
 172                 R_UploadTexture(glt);
 173 }
 174
 175 int R_RealGetTexture(rtexture_t *rt)
 176 {
 177         if (rt)
 178         {
 179                 gltexture_t *glt;
 180                 glt = (gltexture_t *)rt;
 181                 if (glt->flags & GLTEXF_UPLOAD)
 182                         R_UploadTexture(glt);
 183                 return glt->texnum;
 184         }
 185         else
 186                 return 0;
 187 }
 188
 189 void R_FreeTexture(rtexture_t *rt)
 190 {
 191         gltexture_t *glt, **gltpointer;
 192
 193         glt = (gltexture_t *)rt;
 194         if (glt == NULL)
 195                 Host_Error("R_FreeTexture: texture == NULL");
 196
 197         for (gltpointer = &glt->pool->gltchain;*gltpointer && *gltpointer != glt;gltpointer = &(*gltpointer)->chain);
 198         if (*gltpointer == glt)
 199                 *gltpointer = glt->chain;
 200         else
 201                 Host_Error("R_FreeTexture: texture \"%s\" not linked in pool", glt->identifier);
 202
 203         if (glt->texnum)
 204                 qglDeleteTextures(1, (GLuint *)&glt->texnum);
 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         for (pool = gltexturepoolchain;pool;pool = pool->next)
 300         {
 301                 for (glt = pool->gltchain;glt;glt = glt->chain)
 302                 {
 303                         // only update already uploaded images
 304                         if (!(glt->flags & (GLTEXF_UPLOAD | TEXF_FORCENEAREST | TEXF_FORCELINEAR)))
 305                         {
 306                                 qglGetIntegerv(gltexturetypebindingenums[glt->texturetype], &oldbindtexnum);
 307                                 qglBindTexture(gltexturetypeenums[glt->texturetype], glt->texnum);
 308                                 if (glt->flags & TEXF_MIPMAP)
 309                                         qglTexParameteri(gltexturetypeenums[glt->texturetype], GL_TEXTURE_MIN_FILTER, gl_filter_min);
 310                                 else
 311                                         qglTexParameteri(gltexturetypeenums[glt->texturetype], GL_TEXTURE_MIN_FILTER, gl_filter_mag);
 312                                 qglTexParameteri(gltexturetypeenums[glt->texturetype], GL_TEXTURE_MAG_FILTER, gl_filter_mag);
 313                                 qglBindTexture(gltexturetypeenums[glt->texturetype], oldbindtexnum);
 314                         }
 315                 }
 316         }
 317 }
 318
 319 static void GL_Texture_CalcImageSize(int texturetype, int flags, int inwidth, int inheight, int indepth, int *outwidth, int *outheight, int *outdepth)
 320 {
 321         int picmip = 0, maxsize = 0, width2 = 1, height2 = 1, depth2 = 1;
 322
 323         if (gl_max_size.integer > gl_max_texture_size)
 324                 Cvar_SetValue("gl_max_size", gl_max_texture_size);
 325
 326         switch (texturetype)
 327         {
 328         default:
 329         case GLTEXTURETYPE_1D:
 330         case GLTEXTURETYPE_2D:
 331                 maxsize = gl_max_texture_size;
 332                 break;
 333         case GLTEXTURETYPE_3D:
 334                 maxsize = gl_max_3d_texture_size;
 335                 break;
 336         case GLTEXTURETYPE_CUBEMAP:
 337                 maxsize = gl_max_cube_map_texture_size;
 338                 break;
 339         }
 340
 341         if (flags & TEXF_PICMIP)
 342         {
 343                 maxsize = min(maxsize, gl_max_size.integer);
 344                 picmip = gl_picmip.integer;
 345         }
 346
 347         if (outwidth)
 348         {
 349                 for (width2 = 1;width2 < inwidth;width2 <<= 1);
 350                 for (width2 >>= picmip;width2 > maxsize;width2 >>= 1);
 351                 *outwidth = max(1, width2);
 352         }
 353         if (outheight)
 354         {
 355                 for (height2 = 1;height2 < inheight;height2 <<= 1);
 356                 for (height2 >>= picmip;height2 > maxsize;height2 >>= 1);
 357                 *outheight = max(1, height2);
 358         }
 359         if (outdepth)
 360         {
 361                 for (depth2 = 1;depth2 < indepth;depth2 <<= 1);
 362                 for (depth2 >>= picmip;depth2 > maxsize;depth2 >>= 1);
 363                 *outdepth = max(1, depth2);
 364         }
 365 }
 366
 367
 368 static int R_CalcTexelDataSize (gltexture_t *glt)
 369 {
 370         int width2, height2, depth2, size;
 371
 372         GL_Texture_CalcImageSize(glt->texturetype, glt->flags, glt->inputwidth, glt->inputheight, glt->inputdepth, &width2, &height2, &depth2);
 373
 374         size = width2 * height2 * depth2;
 375
 376         if (glt->flags & TEXF_MIPMAP)
 377         {
 378                 while (width2 > 1 || height2 > 1 || depth2 > 1)
 379                 {
 380                         if (width2 > 1)
 381                                 width2 >>= 1;
 382                         if (height2 > 1)
 383                                 height2 >>= 1;
 384                         if (depth2 > 1)
 385                                 depth2 >>= 1;
 386                         size += width2 * height2 * depth2;
 387                 }
 388         }
 389
 390         return size * glt->textype->internalbytesperpixel * glt->sides;
 391 }
 392
 393 void R_TextureStats_Print(qboolean printeach, qboolean printpool, qboolean printtotal)
 394 {
 395         int glsize;
 396         int isloaded;
 397         int pooltotal = 0, pooltotalt = 0, pooltotalp = 0, poolloaded = 0, poolloadedt = 0, poolloadedp = 0;
 398         int sumtotal = 0, sumtotalt = 0, sumtotalp = 0, sumloaded = 0, sumloadedt = 0, sumloadedp = 0;
 399         gltexture_t *glt;
 400         gltexturepool_t *pool;
 401         if (printeach)
 402                 Con_Print("glsize input loaded mip alpha name\n");
 403         for (pool = gltexturepoolchain;pool;pool = pool->next)
 404         {
 405                 pooltotal = 0;
 406                 pooltotalt = 0;
 407                 pooltotalp = 0;
 408                 poolloaded = 0;
 409                 poolloadedt = 0;
 410                 poolloadedp = 0;
 411                 for (glt = pool->gltchain;glt;glt = glt->chain)
 412                 {
 413                         glsize = R_CalcTexelDataSize(glt);
 414                         isloaded = !(glt->flags & GLTEXF_UPLOAD);
 415                         pooltotal++;
 416                         pooltotalt += glsize;
 417                         pooltotalp += glt->inputdatasize;
 418                         if (isloaded)
 419                         {
 420                                 poolloaded++;
 421                                 poolloadedt += glsize;
 422                                 poolloadedp += glt->inputdatasize;
 423                         }
 424                         if (printeach)
 425                                 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);
 426                 }
 427                 if (printpool)
 428                         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);
 429                 sumtotal += pooltotal;
 430                 sumtotalt += pooltotalt;
 431                 sumtotalp += pooltotalp;
 432                 sumloaded += poolloaded;
 433                 sumloadedt += poolloadedt;
 434                 sumloadedp += poolloadedp;
 435         }
 436         if (printtotal)
 437                 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);
 438 }
 439
 440 static void R_TextureStats_f(void)
 441 {
 442         R_TextureStats_Print(true, true, true);
 443 }
 444
 445 static void r_textures_start(void)
 446 {
 447         // LordHavoc: allow any alignment
 448         qglPixelStorei(GL_UNPACK_ALIGNMENT, 1);
 449         CHECKGLERROR
 450
 451         texturemempool = Mem_AllocPool("texture management", 0, NULL);
 452
 453         // Disable JPEG screenshots if the DLL isn't loaded
 454         if (! JPEG_OpenLibrary ())
 455                 Cvar_SetValueQuick (&scr_screenshot_jpeg, 0);
 456         // TODO: support png screenshots?
 457         PNG_OpenLibrary ();
 458 }
 459
 460 static void r_textures_shutdown(void)
 461 {
 462         rtexturepool_t *temp;
 463
 464         JPEG_CloseLibrary ();
 465
 466         while(gltexturepoolchain)
 467         {
 468                 temp = (rtexturepool_t *) gltexturepoolchain;
 469                 R_FreeTexturePool(&temp);
 470         }
 471
 472         resizebuffersize = 0;
 473         texturebuffersize = 0;
 474         resizebuffer = NULL;
 475         colorconvertbuffer = NULL;
 476         texturebuffer = NULL;
 477         Mem_FreePool(&texturemempool);
 478 }
 479
 480 static void r_textures_newmap(void)
 481 {
 482 }
 483
 484 void R_Textures_Init (void)
 485 {
 486         Cmd_AddCommand("gl_texturemode", &GL_TextureMode_f, "set texture filtering mode (GL_NEAREST, GL_LINEAR, GL_LINEAR_MIPMAP_LINEAR, etc)");
 487         Cmd_AddCommand("r_texturestats", R_TextureStats_f, "print information about all loaded textures and some statistics");
 488         Cvar_RegisterVariable (&gl_max_size);
 489         Cvar_RegisterVariable (&gl_picmip);
 490         Cvar_RegisterVariable (&r_lerpimages);
 491         Cvar_RegisterVariable (&r_precachetextures);
 492         Cvar_RegisterVariable (&gl_texture_anisotropy);
 493
 494         R_RegisterModule("R_Textures", r_textures_start, r_textures_shutdown, r_textures_newmap);
 495 }
 496
 497 void R_Textures_Frame (void)
 498 {
 499         static int old_aniso = 0;
 500
 501         // could do procedural texture animation here, if we keep track of which
 502         // textures were accessed this frame...
 503
 504         // free the resize buffers
 505         resizebuffersize = 0;
 506         if (resizebuffer)
 507         {
 508                 Mem_Free(resizebuffer);
 509                 resizebuffer = NULL;
 510         }
 511         if (colorconvertbuffer)
 512         {
 513                 Mem_Free(colorconvertbuffer);
 514                 colorconvertbuffer = NULL;
 515         }
 516
 517         if (old_aniso != gl_texture_anisotropy.integer)
 518         {
 519                 gltexture_t *glt;
 520                 gltexturepool_t *pool;
 521                 GLint oldbindtexnum;
 522
 523                 old_aniso = bound(1, gl_texture_anisotropy.integer, gl_max_anisotropy);
 524
 525                 Cvar_SetValueQuick(&gl_texture_anisotropy, old_aniso);
 526
 527                 for (pool = gltexturepoolchain;pool;pool = pool->next)
 528                 {
 529                         for (glt = pool->gltchain;glt;glt = glt->chain)
 530                         {
 531                                 // only update already uploaded images
 532                                 if ((glt->flags & (GLTEXF_UPLOAD | TEXF_MIPMAP)) == TEXF_MIPMAP)
 533                                 {
 534                                         qglGetIntegerv(gltexturetypebindingenums[glt->texturetype], &oldbindtexnum);
 535
 536                                         qglBindTexture(gltexturetypeenums[glt->texturetype], glt->texnum);
 537                                         qglTexParameteri(gltexturetypeenums[glt->texturetype], GL_TEXTURE_MAX_ANISOTROPY_EXT, old_aniso);CHECKGLERROR
 538
 539                                         qglBindTexture(gltexturetypeenums[glt->texturetype], oldbindtexnum);
 540                                 }
 541                         }
 542                 }
 543         }
 544 }
 545
 546 void R_MakeResizeBufferBigger(int size)
 547 {
 548         if (resizebuffersize < size)
 549         {
 550                 resizebuffersize = size;
 551                 if (resizebuffer)
 552                         Mem_Free(resizebuffer);
 553                 if (colorconvertbuffer)
 554                         Mem_Free(colorconvertbuffer);
 555                 resizebuffer = (unsigned char *)Mem_Alloc(texturemempool, resizebuffersize);
 556                 colorconvertbuffer = (unsigned char *)Mem_Alloc(texturemempool, resizebuffersize);
 557                 if (!resizebuffer || !colorconvertbuffer)
 558                         Host_Error("R_Upload: out of memory");
 559         }
 560 }
 561
 562 static void GL_SetupTextureParameters(int flags, int texturetype)
 563 {
 564         int textureenum = gltexturetypeenums[texturetype];
 565         int wrapmode = ((flags & TEXF_CLAMP) && gl_support_clamptoedge) ? GL_CLAMP_TO_EDGE : GL_REPEAT;
 566
 567         CHECKGLERROR
 568
 569         if (gl_support_anisotropy && (flags & TEXF_MIPMAP))
 570         {
 571                 int aniso = bound(1, gl_texture_anisotropy.integer, gl_max_anisotropy);
 572                 if (gl_texture_anisotropy.integer != aniso)
 573                         Cvar_SetValueQuick(&gl_texture_anisotropy, aniso);
 574                 qglTexParameteri(textureenum, GL_TEXTURE_MAX_ANISOTROPY_EXT, aniso);CHECKGLERROR
 575         }
 576         qglTexParameteri(textureenum, GL_TEXTURE_WRAP_S, wrapmode);CHECKGLERROR
 577         qglTexParameteri(textureenum, GL_TEXTURE_WRAP_T, wrapmode);CHECKGLERROR
 578         if (gltexturetypedimensions[texturetype] >= 3)
 579         {
 580                 qglTexParameteri(textureenum, GL_TEXTURE_WRAP_R, wrapmode);CHECKGLERROR
 581         }
 582
 583         CHECKGLERROR
 584         if (flags & TEXF_FORCENEAREST)
 585         {
 586                 if (flags & TEXF_MIPMAP)
 587                 {
 588                         qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, GL_NEAREST_MIPMAP_NEAREST);CHECKGLERROR
 589                 }
 590                 else
 591                 {
 592                         qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, GL_NEAREST);CHECKGLERROR
 593                 }
 594                 qglTexParameteri(textureenum, GL_TEXTURE_MAG_FILTER, GL_NEAREST);CHECKGLERROR
 595         }
 596         else if (flags & TEXF_FORCELINEAR)
 597         {
 598                 if (flags & TEXF_MIPMAP)
 599                 {
 600                         if (gl_filter_min == GL_NEAREST_MIPMAP_LINEAR || gl_filter_min == GL_LINEAR_MIPMAP_LINEAR)
 601                         {
 602                                 qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);CHECKGLERROR
 603                         }
 604                         else
 605                         {
 606                                 qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_NEAREST);CHECKGLERROR
 607                         }
 608                 }
 609                 else
 610                 {
 611                         qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, GL_LINEAR);CHECKGLERROR
 612                 }
 613                 qglTexParameteri(textureenum, GL_TEXTURE_MAG_FILTER, GL_LINEAR);CHECKGLERROR
 614         }
 615         else
 616         {
 617                 if (flags & TEXF_MIPMAP)
 618                 {
 619                         qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, gl_filter_min);CHECKGLERROR
 620                 }
 621                 else
 622                 {
 623                         qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, gl_filter_mag);CHECKGLERROR
 624                 }
 625                 qglTexParameteri(textureenum, GL_TEXTURE_MAG_FILTER, gl_filter_mag);CHECKGLERROR
 626         }
 627
 628         CHECKGLERROR
 629 }
 630
 631 static void R_Upload(gltexture_t *glt, unsigned char *data, int fragx, int fragy, int fragz, int fragwidth, int fragheight, int fragdepth)
 632 {
 633         int i, mip, width, height, depth;
 634         GLint oldbindtexnum;
 635         unsigned char *prevbuffer;
 636         prevbuffer = data;
 637
 638         CHECKGLERROR
 639
 640         // we need to restore the texture binding after finishing the upload
 641         qglGetIntegerv(gltexturetypebindingenums[glt->texturetype], &oldbindtexnum);
 642         qglBindTexture(gltexturetypeenums[glt->texturetype], glt->texnum);
 643         CHECKGLERROR
 644
 645         R_MakeResizeBufferBigger(fragwidth * fragheight * fragdepth * glt->sides * glt->bytesperpixel);
 646
 647         if (prevbuffer == NULL)
 648         {
 649                 memset(resizebuffer, 0, fragwidth * fragheight * fragdepth * glt->bytesperpixel);
 650                 prevbuffer = resizebuffer;
 651         }
 652         else if (glt->textype->textype == TEXTYPE_PALETTE)
 653         {
 654                 // promote paletted to RGBA, so we only have to worry about RGB and
 655                 // RGBA in the rest of this code
 656                 Image_Copy8bitRGBA(prevbuffer, colorconvertbuffer, fragwidth * fragheight * fragdepth * glt->sides, glt->palette);
 657                 prevbuffer = colorconvertbuffer;
 658         }
 659
 660         // these are rounded up versions of the size to do better resampling
 661         for (width  = 1;width  < glt->inputwidth ;width  <<= 1);
 662         for (height = 1;height < glt->inputheight;height <<= 1);
 663         for (depth  = 1;depth  < glt->inputdepth ;depth  <<= 1);
 664
 665         R_MakeResizeBufferBigger(width * height * depth * glt->sides * glt->bytesperpixel);
 666
 667         if ((glt->flags & (TEXF_MIPMAP | TEXF_PICMIP | GLTEXF_UPLOAD)) == 0)
 668         {
 669                 // update a portion of the image
 670                 switch(glt->texturetype)
 671                 {
 672                 case GLTEXTURETYPE_1D:
 673                         qglTexSubImage1D(GL_TEXTURE_1D, 0, fragx, fragwidth, glt->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 674                         CHECKGLERROR
 675                         break;
 676                 case GLTEXTURETYPE_2D:
 677                         qglTexSubImage2D(GL_TEXTURE_2D, 0, fragx, fragy, fragwidth, fragheight, glt->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 678                         CHECKGLERROR
 679                         break;
 680                 case GLTEXTURETYPE_3D:
 681                         qglTexSubImage3D(GL_TEXTURE_3D, 0, fragx, fragy, fragz, fragwidth, fragheight, fragdepth, glt->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 682                         CHECKGLERROR
 683                         break;
 684                 default:
 685                         Host_Error("R_Upload: partial update of type other than 1D, 2D, or 3D");
 686                         break;
 687                 }
 688         }
 689         else
 690         {
 691                 if (fragx || fragy || fragz || glt->inputwidth != fragwidth || glt->inputheight != fragheight || glt->inputdepth != fragdepth)
 692                         Host_Error("R_Upload: partial update not allowed on initial upload or in combination with PICMIP or MIPMAP\n");
 693
 694                 // upload the image for the first time
 695                 glt->flags &= ~GLTEXF_UPLOAD;
 696
 697                 // cubemaps contain multiple images and thus get processed a bit differently
 698                 if (glt->texturetype != GLTEXTURETYPE_CUBEMAP)
 699                 {
 700                         if (glt->inputwidth != width || glt->inputheight != height || glt->inputdepth != depth)
 701                         {
 702                                 Image_Resample(prevbuffer, glt->inputwidth, glt->inputheight, glt->inputdepth, resizebuffer, width, height, depth, glt->bytesperpixel, r_lerpimages.integer);
 703                                 prevbuffer = resizebuffer;
 704                         }
 705                         // picmip/max_size
 706                         while (width > glt->tilewidth || height > glt->tileheight || depth > glt->tiledepth)
 707                         {
 708                                 Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, glt->tilewidth, glt->tileheight, glt->tiledepth, glt->bytesperpixel);
 709                                 prevbuffer = resizebuffer;
 710                         }
 711                 }
 712                 mip = 0;
 713                 switch(glt->texturetype)
 714                 {
 715                 case GLTEXTURETYPE_1D:
 716                         qglTexImage1D(GL_TEXTURE_1D, mip++, glt->glinternalformat, width, 0, glt->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 717                         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);
 725                                         CHECKGLERROR
 726                                 }
 727                         }
 728                         break;
 729                 case GLTEXTURETYPE_2D:
 730                         qglTexImage2D(GL_TEXTURE_2D, mip++, glt->glinternalformat, width, height, 0, glt->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 731                         CHECKGLERROR
 732                         if (glt->flags & TEXF_MIPMAP)
 733                         {
 734                                 while (width > 1 || height > 1 || depth > 1)
 735                                 {
 736                                         Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1, glt->bytesperpixel);
 737                                         prevbuffer = resizebuffer;
 738                                         qglTexImage2D(GL_TEXTURE_2D, mip++, glt->glinternalformat, width, height, 0, glt->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 739                                         CHECKGLERROR
 740                                 }
 741                         }
 742                         break;
 743                 case GLTEXTURETYPE_3D:
 744                         qglTexImage3D(GL_TEXTURE_3D, mip++, glt->glinternalformat, width, height, depth, 0, glt->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 745                         CHECKGLERROR
 746                         if (glt->flags & TEXF_MIPMAP)
 747                         {
 748                                 while (width > 1 || height > 1 || depth > 1)
 749                                 {
 750                                         Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1, glt->bytesperpixel);
 751                                         prevbuffer = resizebuffer;
 752                                         qglTexImage3D(GL_TEXTURE_3D, mip++, glt->glinternalformat, width, height, depth, 0, glt->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 753                                         CHECKGLERROR
 754                                 }
 755                         }
 756                         break;
 757                 case GLTEXTURETYPE_CUBEMAP:
 758                         // convert and upload each side in turn,
 759                         // from a continuous block of input texels
 760                         texturebuffer = prevbuffer;
 761                         for (i = 0;i < 6;i++)
 762                         {
 763                                 prevbuffer = texturebuffer;
 764                                 texturebuffer += glt->inputwidth * glt->inputheight * glt->inputdepth * glt->textype->inputbytesperpixel;
 765                                 if (glt->inputwidth != width || glt->inputheight != height || glt->inputdepth != depth)
 766                                 {
 767                                         Image_Resample(prevbuffer, glt->inputwidth, glt->inputheight, glt->inputdepth, resizebuffer, width, height, depth, glt->bytesperpixel, r_lerpimages.integer);
 768                                         prevbuffer = resizebuffer;
 769                                 }
 770                                 // picmip/max_size
 771                                 while (width > glt->tilewidth || height > glt->tileheight || depth > glt->tiledepth)
 772                                 {
 773                                         Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, glt->tilewidth, glt->tileheight, glt->tiledepth, glt->bytesperpixel);
 774                                         prevbuffer = resizebuffer;
 775                                 }
 776                                 mip = 0;
 777                                 qglTexImage2D(cubemapside[i], mip++, glt->glinternalformat, width, height, 0, glt->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 778                                 CHECKGLERROR
 779                                 if (glt->flags & TEXF_MIPMAP)
 780                                 {
 781                                         while (width > 1 || height > 1 || depth > 1)
 782                                         {
 783                                                 Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1, glt->bytesperpixel);
 784                                                 prevbuffer = resizebuffer;
 785                                                 qglTexImage2D(cubemapside[i], mip++, glt->glinternalformat, width, height, 0, glt->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 786                                                 CHECKGLERROR
 787                                         }
 788                                 }
 789                         }
 790                         break;
 791                 }
 792                 GL_SetupTextureParameters(glt->flags, glt->texturetype);
 793         }
 794         qglBindTexture(gltexturetypeenums[glt->texturetype], oldbindtexnum);
 795 }
 796
 797 static void R_UploadTexture (gltexture_t *glt)
 798 {
 799         if (!(glt->flags & GLTEXF_UPLOAD))
 800                 return;
 801
 802         qglGenTextures(1, (GLuint *)&glt->texnum);
 803         R_Upload(glt, glt->inputtexels, 0, 0, 0, glt->inputwidth, glt->inputheight, glt->inputdepth);
 804         if (glt->inputtexels)
 805         {
 806                 Mem_Free(glt->inputtexels);
 807                 glt->inputtexels = NULL;
 808                 glt->flags |= GLTEXF_DESTROYED;
 809         }
 810         else if (glt->flags & GLTEXF_DESTROYED)
 811                 Con_Printf("R_UploadTexture: Texture %s already uploaded and destroyed.  Can not upload original image again.  Uploaded blank texture.\n", glt->identifier);
 812 }
 813
 814 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)
 815 {
 816         int i, size;
 817         gltexture_t *glt;
 818         gltexturepool_t *pool = (gltexturepool_t *)rtexturepool;
 819         textypeinfo_t *texinfo;
 820
 821         if (cls.state == ca_dedicated)
 822                 return NULL;
 823
 824         if (texturetype == GLTEXTURETYPE_CUBEMAP && !gl_texturecubemap)
 825         {
 826                 Con_Printf ("R_LoadTexture: cubemap texture not supported by driver\n");
 827                 return NULL;
 828         }
 829         if (texturetype == GLTEXTURETYPE_3D && !gl_texture3d)
 830         {
 831                 Con_Printf ("R_LoadTexture: 3d texture not supported by driver\n");
 832                 return NULL;
 833         }
 834
 835         texinfo = R_GetTexTypeInfo(textype, flags);
 836         size = width * height * depth * sides * texinfo->inputbytesperpixel;
 837         if (size < 1)
 838         {
 839                 Con_Printf ("R_LoadTexture: bogus texture size (%dx%dx%dx%dbppx%dsides = %d bytes)\n", width, height, depth, texinfo->inputbytesperpixel * 8, sides);
 840                 return NULL;
 841         }
 842
 843         // clear the alpha flag if the texture has no transparent pixels
 844         switch(textype)
 845         {
 846         case TEXTYPE_PALETTE:
 847                 if (flags & TEXF_ALPHA)
 848                 {
 849                         flags &= ~TEXF_ALPHA;
 850                         if (data)
 851                         {
 852                                 for (i = 0;i < size;i++)
 853                                 {
 854                                         if (((unsigned char *)&palette[data[i]])[3] < 255)
 855                                         {
 856                                                 flags |= TEXF_ALPHA;
 857                                                 break;
 858                                         }
 859                                 }
 860                         }
 861                 }
 862                 break;
 863         case TEXTYPE_RGB:
 864                 if (flags & TEXF_ALPHA)
 865                         Host_Error("R_LoadTexture: RGB has no alpha, don't specify TEXF_ALPHA");
 866                 break;
 867         case TEXTYPE_RGBA:
 868                 if (flags & TEXF_ALPHA)
 869                 {
 870                         flags &= ~TEXF_ALPHA;
 871                         if (data)
 872                         {
 873                                 for (i = 3;i < size;i += 4)
 874                                 {
 875                                         if (data[i] < 255)
 876                                         {
 877                                                 flags |= TEXF_ALPHA;
 878                                                 break;
 879                                         }
 880                                 }
 881                         }
 882                 }
 883                 break;
 884         case TEXTYPE_DSDT:
 885                 break;
 886         default:
 887                 Host_Error("R_LoadTexture: unknown texture type");
 888         }
 889
 890         glt = (gltexture_t *)Mem_Alloc(texturemempool, sizeof(gltexture_t));
 891         if (identifier)
 892                 strlcpy (glt->identifier, identifier, sizeof(glt->identifier));
 893         glt->pool = pool;
 894         glt->chain = pool->gltchain;
 895         pool->gltchain = glt;
 896         glt->inputwidth = width;
 897         glt->inputheight = height;
 898         glt->inputdepth = depth;
 899         glt->flags = flags | GLTEXF_UPLOAD;
 900         glt->textype = texinfo;
 901         glt->texturetype = texturetype;
 902         glt->inputdatasize = size;
 903         glt->palette = palette;
 904         glt->glinternalformat = texinfo->glinternalformat;
 905         glt->glformat = texinfo->glformat;
 906         glt->bytesperpixel = texinfo->internalbytesperpixel;
 907         glt->sides = glt->texturetype == GLTEXTURETYPE_CUBEMAP ? 6 : 1;
 908         glt->texnum = -1;
 909
 910         if (data)
 911         {
 912                 glt->inputtexels = (unsigned char *)Mem_Alloc(texturemempool, size);
 913                 memcpy(glt->inputtexels, data, size);
 914         }
 915         else
 916                 glt->inputtexels = NULL;
 917
 918         GL_Texture_CalcImageSize(glt->texturetype, glt->flags, glt->inputwidth, glt->inputheight, glt->inputdepth, &glt->tilewidth, &glt->tileheight, &glt->tiledepth);
 919         R_PrecacheTexture(glt);
 920
 921         return (rtexture_t *)glt;
 922 }
 923
 924 rtexture_t *R_LoadTexture1D(rtexturepool_t *rtexturepool, const char *identifier, int width, const unsigned char *data, int textype, int flags, const unsigned int *palette)
 925 {
 926         return R_SetupTexture(rtexturepool, identifier, width, 1, 1, 1, flags, textype, GLTEXTURETYPE_1D, data, palette);
 927 }
 928
 929 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)
 930 {
 931         return R_SetupTexture(rtexturepool, identifier, width, height, 1, 1, flags, textype, GLTEXTURETYPE_2D, data, palette);
 932 }
 933
 934 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)
 935 {
 936         return R_SetupTexture(rtexturepool, identifier, width, height, depth, 1, flags, textype, GLTEXTURETYPE_3D, data, palette);
 937 }
 938
 939 rtexture_t *R_LoadTextureCubeMap(rtexturepool_t *rtexturepool, const char *identifier, int width, const unsigned char *data, int textype, int flags, const unsigned int *palette)
 940 {
 941         return R_SetupTexture(rtexturepool, identifier, width, width, 1, 6, flags, textype, GLTEXTURETYPE_CUBEMAP, data, palette);
 942 }
 943
 944 int R_TextureHasAlpha(rtexture_t *rt)
 945 {
 946         return rt ? (((gltexture_t *)rt)->flags & TEXF_ALPHA) != 0 : false;
 947 }
 948
 949 int R_TextureWidth(rtexture_t *rt)
 950 {
 951         return rt ? ((gltexture_t *)rt)->inputwidth : 0;
 952 }
 953
 954 int R_TextureHeight(rtexture_t *rt)
 955 {
 956         return rt ? ((gltexture_t *)rt)->inputheight : 0;
 957 }
 958
 959 void R_UpdateTexture(rtexture_t *rt, unsigned char *data, int x, int y, int width, int height)
 960 {
 961         gltexture_t *glt;
 962         if (rt == NULL)
 963                 Host_Error("R_UpdateTexture: no texture supplied");
 964         if (data == NULL)
 965                 Host_Error("R_UpdateTexture: no data supplied");
 966         glt = (gltexture_t *)rt;
 967
 968         // we need it to be uploaded before we can update a part of it
 969         if (glt->flags & GLTEXF_UPLOAD)
 970                 R_UploadTexture(glt);
 971
 972         // update part of the texture
 973         R_Upload(glt, data, x, y, 0, width, height, 1);
 974 }
 975