gl_draw.c

   1 /*
   2 Copyright (C) 1996-1997 Id Software, Inc.
   3
   4 This program is free software; you can redistribute it and/or
   5 modify it under the terms of the GNU General Public License
   6 as published by the Free Software Foundation; either version 2
   7 of the License, or (at your option) any later version.
   8
   9 This program is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  12
  13 See the GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with this program; if not, write to the Free Software
  17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  18
  19 */
  20
  21 // draw.c -- this is the only file outside the refresh that touches the
  22 // vid buffer
  23
  24 #include "quakedef.h"
  25
  26 #define GL_COLOR_INDEX8_EXT     0x80E5
  27
  28 extern unsigned char d_15to8table[65536];
  29
  30 cvar_t          qsg_version = {"qsg_version", "1"};
  31 cvar_t          gl_max_size = {"gl_max_size", "1024"};
  32 cvar_t          gl_picmip = {"gl_picmip", "0"};
  33 cvar_t          gl_conalpha = {"gl_conalpha", "1"};
  34 cvar_t          gl_lerpimages = {"gl_lerpimages", "1"};
  35
  36 byte            *draw_chars;                            // 8*8 graphic characters
  37 qpic_t          *draw_disc;
  38
  39 int                     translate_texture;
  40 int                     char_texture;
  41
  42 typedef struct
  43 {
  44         int             texnum;
  45         float   sl, tl, sh, th;
  46 } glpic_t;
  47
  48 byte            conback_buffer[sizeof(qpic_t) + sizeof(glpic_t)];
  49 qpic_t          *conback = (qpic_t *)&conback_buffer;
  50
  51 int             gl_filter_min = GL_LINEAR_MIPMAP_LINEAR; //NEAREST;
  52 int             gl_filter_max = GL_LINEAR;
  53
  54
  55 int             texels;
  56
  57 typedef struct
  58 {
  59         int             texnum;
  60         char    identifier[64];
  61         int             width, height;
  62         qboolean        mipmap;
  63 // LordHavoc: 32bit textures
  64         int             bytesperpixel;
  65 // LordHavoc: CRC to identify cache mismatchs
  66         int             crc;
  67         int             lerped; // whether this texture was uploaded with or without interpolation
  68 } gltexture_t;
  69
  70 #define MAX_GLTEXTURES  4096
  71 gltexture_t     gltextures[MAX_GLTEXTURES];
  72 int                     numgltextures;
  73
  74 /*
  75 =============================================================================
  76
  77   scrap allocation
  78
  79   Allocate all the little status bar obejcts into a single texture
  80   to crutch up stupid hardware / drivers
  81
  82 =============================================================================
  83 */
  84
  85 #define MAX_SCRAPS              2
  86 #define BLOCK_WIDTH             256
  87 #define BLOCK_HEIGHT    256
  88
  89 int                     scrap_allocated[MAX_SCRAPS][BLOCK_WIDTH];
  90 byte            scrap_texels[MAX_SCRAPS][BLOCK_WIDTH*BLOCK_HEIGHT*4];
  91 qboolean        scrap_dirty;
  92 int                     scrap_texnum;
  93
  94 // returns a texture number and the position inside it
  95 int Scrap_AllocBlock (int w, int h, int *x, int *y)
  96 {
  97         int             i, j;
  98         int             best, best2;
  99         int             texnum;
 100
 101         for (texnum=0 ; texnum<MAX_SCRAPS ; texnum++)
 102         {
 103                 best = BLOCK_HEIGHT;
 104
 105                 for (i=0 ; i<BLOCK_WIDTH-w ; i++)
 106                 {
 107                         best2 = 0;
 108
 109                         for (j=0 ; j<w ; j++)
 110                         {
 111                                 if (scrap_allocated[texnum][i+j] >= best)
 112                                         break;
 113                                 if (scrap_allocated[texnum][i+j] > best2)
 114                                         best2 = scrap_allocated[texnum][i+j];
 115                         }
 116                         if (j == w)
 117                         {       // this is a valid spot
 118                                 *x = i;
 119                                 *y = best = best2;
 120                         }
 121                 }
 122
 123                 if (best + h > BLOCK_HEIGHT)
 124                         continue;
 125
 126                 for (i=0 ; i<w ; i++)
 127                         scrap_allocated[texnum][*x + i] = best + h;
 128
 129                 return texnum;
 130         }
 131
 132         Sys_Error ("Scrap_AllocBlock: full");
 133         return 0;
 134 }
 135
 136 int     scrap_uploads;
 137
 138 void Scrap_Upload (void)
 139 {
 140         int             texnum;
 141
 142         scrap_uploads++;
 143
 144         for (texnum=0 ; texnum<MAX_SCRAPS ; texnum++)
 145         {
 146                 glBindTexture(GL_TEXTURE_2D, scrap_texnum + texnum);
 147                 GL_Upload8 (scrap_texels[texnum], BLOCK_WIDTH, BLOCK_HEIGHT, false, true);
 148         }
 149         scrap_dirty = false;
 150 }
 151
 152 //=============================================================================
 153 /* Support Routines */
 154
 155 typedef struct cachepic_s
 156 {
 157         char            name[MAX_QPATH];
 158         qpic_t          pic;
 159         byte            padding[32];    // for appended glpic
 160 } cachepic_t;
 161
 162 #define MAX_CACHED_PICS         128
 163 cachepic_t      menu_cachepics[MAX_CACHED_PICS];
 164 int                     menu_numcachepics;
 165
 166 byte            menuplyr_pixels[4096];
 167
 168 int             pic_texels;
 169 int             pic_count;
 170
 171 int GL_LoadPicTexture (qpic_t *pic);
 172
 173 qpic_t *Draw_PicFromWad (char *name)
 174 {
 175         qpic_t  *p;
 176         glpic_t *gl;
 177
 178         p = W_GetLumpName (name);
 179         gl = (glpic_t *)p->data;
 180
 181         // load little ones into the scrap
 182         if (p->width < 64 && p->height < 64)
 183         {
 184                 int             x, y;
 185                 int             i, j, k;
 186                 int             texnum;
 187
 188                 texnum = Scrap_AllocBlock (p->width, p->height, &x, &y);
 189                 scrap_dirty = true;
 190                 k = 0;
 191                 for (i=0 ; i<p->height ; i++)
 192                         for (j=0 ; j<p->width ; j++, k++)
 193                                 scrap_texels[texnum][(y+i)*BLOCK_WIDTH + x + j] = p->data[k];
 194                 texnum += scrap_texnum;
 195                 gl->texnum = texnum;
 196                 gl->sl = (x+0.01)/(float)BLOCK_WIDTH;
 197                 gl->sh = (x+p->width-0.01)/(float)BLOCK_WIDTH;
 198                 gl->tl = (y+0.01)/(float)BLOCK_WIDTH;
 199                 gl->th = (y+p->height-0.01)/(float)BLOCK_WIDTH;
 200
 201                 pic_count++;
 202                 pic_texels += p->width*p->height;
 203                 // LordHavoc: LINEAR interpolation
 204                 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 205                 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 206         }
 207         else
 208         {
 209                 gl->texnum = GL_LoadPicTexture (p);
 210                 gl->sl = 0;
 211                 gl->sh = 1;
 212                 gl->tl = 0;
 213                 gl->th = 1;
 214                 // LordHavoc: LINEAR interpolation
 215                 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); //NEAREST);
 216                 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); //NEAREST);
 217         }
 218         return p;
 219 }
 220
 221
 222 /*
 223 ================
 224 Draw_CachePic
 225 ================
 226 */
 227 qpic_t  *Draw_CachePic (char *path)
 228 {
 229         cachepic_t      *pic;
 230         int                     i;
 231         qpic_t          *dat;
 232         glpic_t         *gl;
 233
 234         for (pic=menu_cachepics, i=0 ; i<menu_numcachepics ; pic++, i++)
 235                 if (!strcmp (path, pic->name))
 236                         return &pic->pic;
 237
 238         if (menu_numcachepics == MAX_CACHED_PICS)
 239                 Sys_Error ("menu_numcachepics == MAX_CACHED_PICS");
 240         menu_numcachepics++;
 241         strcpy (pic->name, path);
 242
 243 //
 244 // load the pic from disk
 245 //
 246         dat = (qpic_t *)COM_LoadTempFile (path, false);
 247         if (!dat)
 248                 Sys_Error ("Draw_CachePic: failed to load %s", path);
 249         SwapPic (dat);
 250
 251         // HACK HACK HACK --- we need to keep the bytes for
 252         // the translatable player picture just for the menu
 253         // configuration dialog
 254         if (!strcmp (path, "gfx/menuplyr.lmp"))
 255                 memcpy (menuplyr_pixels, dat->data, dat->width*dat->height);
 256
 257         pic->pic.width = dat->width;
 258         pic->pic.height = dat->height;
 259
 260         gl = (glpic_t *)pic->pic.data;
 261         gl->texnum = GL_LoadPicTexture (dat);
 262         gl->sl = 0;
 263         gl->sh = 1;
 264         gl->tl = 0;
 265         gl->th = 1;
 266
 267         return &pic->pic;
 268 }
 269
 270
 271 void Draw_CharToConback (int num, byte *dest)
 272 {
 273         int             row, col;
 274         byte    *source;
 275         int             drawline;
 276         int             x;
 277
 278         row = num>>4;
 279         col = num&15;
 280         source = draw_chars + (row<<10) + (col<<3);
 281
 282         drawline = 8;
 283
 284         while (drawline--)
 285         {
 286                 for (x=0 ; x<8 ; x++)
 287                         if (source[x] != 255)
 288                                 dest[x] = 0x60 + source[x];
 289                 source += 128;
 290                 dest += 320;
 291         }
 292
 293 }
 294
 295 typedef struct
 296 {
 297         char *name;
 298         int     minimize, maximize;
 299 } glmode_t;
 300
 301 glmode_t modes[] = {
 302         {"GL_NEAREST", GL_NEAREST, GL_NEAREST},
 303         {"GL_LINEAR", GL_LINEAR, GL_LINEAR},
 304         {"GL_NEAREST_MIPMAP_NEAREST", GL_NEAREST_MIPMAP_NEAREST, GL_NEAREST},
 305         {"GL_LINEAR_MIPMAP_NEAREST", GL_LINEAR_MIPMAP_NEAREST, GL_LINEAR},
 306         {"GL_NEAREST_MIPMAP_LINEAR", GL_NEAREST_MIPMAP_LINEAR, GL_NEAREST},
 307         {"GL_LINEAR_MIPMAP_LINEAR", GL_LINEAR_MIPMAP_LINEAR, GL_LINEAR}
 308 };
 309
 310 /*
 311 ===============
 312 Draw_TextureMode_f
 313 ===============
 314 */
 315 void Draw_TextureMode_f (void)
 316 {
 317         int             i;
 318         gltexture_t     *glt;
 319
 320         if (Cmd_Argc() == 1)
 321         {
 322                 for (i=0 ; i< 6 ; i++)
 323                         if (gl_filter_min == modes[i].minimize)
 324                         {
 325                                 Con_Printf ("%s\n", modes[i].name);
 326                                 return;
 327                         }
 328                 Con_Printf ("current filter is unknown???\n");
 329                 return;
 330         }
 331
 332         for (i=0 ; i< 6 ; i++)
 333         {
 334                 if (!Q_strcasecmp (modes[i].name, Cmd_Argv(1) ) )
 335                         break;
 336         }
 337         if (i == 6)
 338         {
 339                 Con_Printf ("bad filter name\n");
 340                 return;
 341         }
 342
 343         gl_filter_min = modes[i].minimize;
 344         gl_filter_max = modes[i].maximize;
 345
 346         // change all the existing mipmap texture objects
 347         for (i=0, glt=gltextures ; i<numgltextures ; i++, glt++)
 348         {
 349                 if (glt->mipmap)
 350                 {
 351                         glBindTexture(GL_TEXTURE_2D, glt->texnum);
 352                         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl_filter_min);
 353                         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, gl_filter_max);
 354                 }
 355         }
 356 }
 357
 358 extern void LoadSky_f(void);
 359
 360 extern char *QSG_EXTENSIONS;
 361
 362 /*
 363 ===============
 364 Draw_Init
 365 ===============
 366 */
 367 void rmain_registercvars();
 368 void Draw_Init (void)
 369 {
 370         int             i;
 371         qpic_t  *cb;
 372         byte    *dest;
 373         int             x, y;
 374         char    ver[40];
 375         glpic_t *gl;
 376         int             start;
 377
 378         Cvar_RegisterVariable (&qsg_version);
 379         Cvar_RegisterVariable (&gl_max_size);
 380         Cvar_RegisterVariable (&gl_picmip);
 381         Cvar_RegisterVariable (&gl_conalpha);
 382         Cvar_RegisterVariable (&gl_lerpimages);
 383
 384         // 3dfx can only handle 256 wide textures
 385         if (!Q_strncasecmp ((char *)gl_renderer, "3dfx",4) ||
 386                 strstr((char *)gl_renderer, "Glide"))
 387                 Cvar_Set ("gl_max_size", "256");
 388
 389         Cmd_AddCommand ("gl_texturemode", &Draw_TextureMode_f);
 390
 391         Cmd_AddCommand ("loadsky", &LoadSky_f);
 392
 393         // load the console background and the charset
 394         // by hand, because we need to write the version
 395         // string into the background before turning
 396         // it into a texture
 397         draw_chars = W_GetLumpName ("conchars");
 398         for (i=0 ; i<256*64 ; i++)
 399                 if (draw_chars[i] == 0)
 400                         draw_chars[i] = 255;    // proper transparent color
 401
 402         // now turn them into textures
 403         char_texture = GL_LoadTexture ("charset", 128, 128, draw_chars, false, true, 1);
 404
 405         start = Hunk_LowMark();
 406
 407         cb = (qpic_t *)COM_LoadMallocFile ("gfx/conback.lmp", false);
 408         if (!cb)
 409                 Sys_Error ("Couldn't load gfx/conback.lmp");
 410         SwapPic (cb);
 411
 412         // hack the version number directly into the pic
 413 #ifdef NEHAHRA
 414 #if defined(__linux__)
 415         sprintf (ver, "DPNehahra Linux GL %.2f", (float) VERSION);
 416 #else
 417         sprintf (ver, "DPNehahra Windows GL %.2f", (float) VERSION);
 418 #endif
 419 #else
 420 #if defined(__linux__)
 421         sprintf (ver, "DarkPlaces Linux GL %.2f", (float)VERSION);
 422 #else
 423         sprintf (ver, "DarkPlaces Windows GL %.2f", (float)VERSION);
 424 #endif
 425 #endif
 426         dest = cb->data + 320*186 + 320 - 11 - 8*strlen(ver);
 427         y = strlen(ver);
 428         for (x=0 ; x<y ; x++)
 429                 Draw_CharToConback (ver[x], dest+(x<<3));
 430
 431         gl = (glpic_t *)conback->data;
 432         gl->texnum = GL_LoadTexture ("conback", cb->width, cb->height, cb->data, false, false, 1);
 433         gl->sl = 0;
 434         gl->sh = 1;
 435         gl->tl = 0;
 436         gl->th = 1;
 437         conback->width = vid.width;
 438         conback->height = vid.height;
 439
 440         // free loaded console
 441         free(cb);
 442
 443         // save a texture slot for translated picture
 444         translate_texture = texture_extension_number++;
 445
 446         // save slots for scraps
 447         scrap_texnum = texture_extension_number;
 448         texture_extension_number += MAX_SCRAPS;
 449
 450         //
 451         // get the other pics we need
 452         //
 453         draw_disc = Draw_PicFromWad ("disc");
 454
 455         rmain_registercvars();
 456 }
 457
 458
 459 /*
 460 ================
 461 Draw_Character
 462
 463 Draws one 8*8 graphics character with 0 being transparent.
 464 It can be clipped to the top of the screen to allow the console to be
 465 smoothly scrolled off.
 466 ================
 467 */
 468 void Draw_Character (int x, int y, int num)
 469 {
 470         int                             row, col;
 471         float                   frow, fcol, size;
 472
 473         if (num == 32)
 474                 return;         // space
 475
 476         num &= 255;
 477
 478         if (y <= -8)
 479                 return;                 // totally off screen
 480
 481         row = num>>4;
 482         col = num&15;
 483
 484         frow = row*0.0625;
 485         fcol = col*0.0625;
 486         size = 0.0625;
 487
 488         glBindTexture(GL_TEXTURE_2D, char_texture);
 489         // LordHavoc: NEAREST mode on text if not scaling up
 490         if ((int) vid.width < glwidth)
 491         {
 492                 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
 493                 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
 494         }
 495
 496         glColor3f(1,1,1);
 497         glBegin (GL_QUADS);
 498         glTexCoord2f (fcol, frow);
 499         glVertex2f (x, y);
 500         glTexCoord2f (fcol + size, frow);
 501         glVertex2f (x+8, y);
 502         glTexCoord2f (fcol + size, frow + size);
 503         glVertex2f (x+8, y+8);
 504         glTexCoord2f (fcol, frow + size);
 505         glVertex2f (x, y+8);
 506         glEnd ();
 507
 508         // LordHavoc: revert to LINEAR mode
 509         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 510         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 511 }
 512
 513 /*
 514 ================
 515 Draw_String
 516 ================
 517 */
 518 // LordHavoc: sped this up a lot, and added maxlen
 519 void Draw_String (int x, int y, char *str, int maxlen)
 520 {
 521         int num;
 522         float frow, fcol;
 523         if (y <= -8 || y >= (int) vid.height || x >= (int) vid.width || *str == 0) // completely offscreen or no text to print
 524                 return;
 525         if (maxlen < 1)
 526                 maxlen = strlen(str);
 527         else if (maxlen > (int) strlen(str))
 528                 maxlen = strlen(str);
 529         glBindTexture(GL_TEXTURE_2D, char_texture);
 530
 531         // LordHavoc: NEAREST mode on text if not scaling up
 532         if ((int) vid.width < glwidth)
 533         {
 534                 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
 535                 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
 536         }
 537
 538         glColor3f(1,1,1);
 539         glBegin (GL_QUADS);
 540         while (maxlen-- && x < (int) vid.width) // stop rendering when out of characters or room
 541         {
 542                 if ((num = *str++) != 32) // skip spaces
 543                 {
 544                         frow = (float) ((int) num >> 4)*0.0625;
 545                         fcol = (float) ((int) num & 15)*0.0625;
 546                         glTexCoord2f (fcol, frow);
 547                         glVertex2f (x, y);
 548                         glTexCoord2f (fcol + 0.0625, frow);
 549                         glVertex2f (x+8, y);
 550                         glTexCoord2f (fcol + 0.0625, frow + 0.0625);
 551                         glVertex2f (x+8, y+8);
 552                         glTexCoord2f (fcol, frow + 0.0625);
 553                         glVertex2f (x, y+8);
 554                 }
 555                 x += 8;
 556         }
 557         glEnd ();
 558
 559         // LordHavoc: revert to LINEAR mode
 560         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 561         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 562 }
 563
 564 /*
 565 =============
 566 Draw_AlphaPic
 567 =============
 568 */
 569 void Draw_AlphaPic (int x, int y, qpic_t *pic, float alpha)
 570 {
 571         glpic_t                 *gl;
 572
 573         if (scrap_dirty)
 574                 Scrap_Upload ();
 575         gl = (glpic_t *)pic->data;
 576 //      glDisable(GL_ALPHA_TEST);
 577 //      glEnable (GL_BLEND);
 578 //      glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 579 //      glCullFace(GL_FRONT);
 580         glColor4f(0.8,0.8,0.8,alpha);
 581         glBindTexture(GL_TEXTURE_2D, gl->texnum);
 582 //      glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
 583         glBegin (GL_QUADS);
 584         glTexCoord2f (gl->sl, gl->tl);
 585         glVertex2f (x, y);
 586         glTexCoord2f (gl->sh, gl->tl);
 587         glVertex2f (x+pic->width, y);
 588         glTexCoord2f (gl->sh, gl->th);
 589         glVertex2f (x+pic->width, y+pic->height);
 590         glTexCoord2f (gl->sl, gl->th);
 591         glVertex2f (x, y+pic->height);
 592         glEnd ();
 593         glColor3f(1,1,1);
 594 //      glEnable(GL_ALPHA_TEST);
 595 //      glDisable (GL_BLEND);
 596 }
 597
 598
 599 /*
 600 =============
 601 Draw_Pic
 602 =============
 603 */
 604 void Draw_Pic (int x, int y, qpic_t *pic)
 605 {
 606         glpic_t                 *gl;
 607
 608         if (scrap_dirty)
 609                 Scrap_Upload ();
 610         gl = (glpic_t *)pic->data;
 611         glColor3f(0.8,0.8,0.8);
 612         glBindTexture(GL_TEXTURE_2D, gl->texnum);
 613         glBegin (GL_QUADS);
 614         glTexCoord2f (gl->sl, gl->tl);
 615         glVertex2f (x, y);
 616         glTexCoord2f (gl->sh, gl->tl);
 617         glVertex2f (x+pic->width, y);
 618         glTexCoord2f (gl->sh, gl->th);
 619         glVertex2f (x+pic->width, y+pic->height);
 620         glTexCoord2f (gl->sl, gl->th);
 621         glVertex2f (x, y+pic->height);
 622         glEnd ();
 623 }
 624
 625
 626 /*
 627 =============
 628 Draw_TransPic
 629 =============
 630 */
 631 void Draw_TransPic (int x, int y, qpic_t *pic)
 632 {
 633         if (x < 0 || (unsigned)(x + pic->width) > vid.width || y < 0 || (unsigned)(y + pic->height) > vid.height)
 634                 Sys_Error ("Draw_TransPic: bad coordinates");
 635
 636 //      glEnable(GL_BLEND);
 637 //      glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 638 //      glDisable(GL_ALPHA_TEST);
 639         Draw_Pic (x, y, pic);
 640 //      glDisable(GL_BLEND);
 641 }
 642
 643
 644 /*
 645 =============
 646 Draw_TransPicTranslate
 647
 648 Only used for the player color selection menu
 649 =============
 650 */
 651 void Draw_TransPicTranslate (int x, int y, qpic_t *pic, byte *translation)
 652 {
 653         int                             v, u, c;
 654         unsigned                trans[64*64], *dest;
 655         byte                    *src;
 656         int                             p;
 657
 658         glBindTexture(GL_TEXTURE_2D, translate_texture);
 659
 660         c = pic->width * pic->height;
 661
 662         dest = trans;
 663         for (v=0 ; v<64 ; v++, dest += 64)
 664         {
 665                 src = &menuplyr_pixels[ ((v*pic->height)>>6) *pic->width];
 666                 for (u=0 ; u<64 ; u++)
 667                 {
 668                         p = src[(u*pic->width)>>6];
 669                         if (p == 255)
 670                                 dest[u] = p;
 671                         else
 672                                 dest[u] =  d_8to24table[translation[p]];
 673                 }
 674         }
 675
 676         glTexImage2D (GL_TEXTURE_2D, 0, 4, 64, 64, 0, GL_RGBA, GL_UNSIGNED_BYTE, trans);
 677
 678         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 679         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 680
 681         glColor3f(0.8,0.8,0.8);
 682         glBegin (GL_QUADS);
 683         glTexCoord2f (0, 0);
 684         glVertex2f (x, y);
 685         glTexCoord2f (1, 0);
 686         glVertex2f (x+pic->width, y);
 687         glTexCoord2f (1, 1);
 688         glVertex2f (x+pic->width, y+pic->height);
 689         glTexCoord2f (0, 1);
 690         glVertex2f (x, y+pic->height);
 691         glEnd ();
 692 }
 693
 694
 695 /*
 696 ================
 697 Draw_ConsoleBackground
 698
 699 ================
 700 */
 701 void Draw_ConsoleBackground (int lines)
 702 {
 703         // LordHavoc: changed alpha
 704         //int y = (vid.height >> 1);
 705
 706         if (lines >= (int) vid.height)
 707                 Draw_Pic(0, lines - vid.height, conback);
 708         else
 709                 Draw_AlphaPic (0, lines - vid.height, conback, gl_conalpha.value*lines/vid.height);
 710         //      Draw_AlphaPic (0, lines - vid.height, conback, (float)(1.2 * lines)/y);
 711 }
 712
 713 /*
 714 =============
 715 Draw_Fill
 716
 717 Fills a box of pixels with a single color
 718 =============
 719 */
 720 void Draw_Fill (int x, int y, int w, int h, int c)
 721 {
 722         glDisable (GL_TEXTURE_2D);
 723         glColor3f (host_basepal[c*3]/255.0, host_basepal[c*3+1]/255.0, host_basepal[c*3+2]/255.0);
 724
 725         glBegin (GL_QUADS);
 726
 727         glVertex2f (x,y);
 728         glVertex2f (x+w, y);
 729         glVertex2f (x+w, y+h);
 730         glVertex2f (x, y+h);
 731
 732         glEnd ();
 733         glColor3f(1,1,1);
 734         glEnable (GL_TEXTURE_2D);
 735 }
 736 //=============================================================================
 737
 738 //=============================================================================
 739
 740 /*
 741 ================
 742 GL_Set2D
 743
 744 Setup as if the screen was 320*200
 745 ================
 746 */
 747 void GL_Set2D (void)
 748 {
 749         glViewport (glx, gly, glwidth, glheight);
 750
 751         glMatrixMode(GL_PROJECTION);
 752     glLoadIdentity ();
 753         glOrtho  (0, vid.width, vid.height, 0, -99999, 99999);
 754
 755         glMatrixMode(GL_MODELVIEW);
 756     glLoadIdentity ();
 757
 758         glDisable (GL_DEPTH_TEST);
 759         glDisable (GL_CULL_FACE);
 760         glEnable (GL_BLEND); // was Disable
 761 //      glEnable (GL_ALPHA_TEST);
 762         glDisable (GL_ALPHA_TEST);
 763         glEnable(GL_TEXTURE_2D);
 764
 765         // LordHavoc: added this
 766         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 767         glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
 768
 769         glColor3f(1,1,1);
 770 }
 771
 772 // LordHavoc: SHOWLMP stuff
 773 #define SHOWLMP_MAXLABELS 256
 774 typedef struct showlmp_s
 775 {
 776         qboolean        isactive;
 777         float           x;
 778         float           y;
 779         char            label[32];
 780         char            pic[128];
 781 } showlmp_t;
 782
 783 showlmp_t showlmp[SHOWLMP_MAXLABELS];
 784
 785 void SHOWLMP_decodehide()
 786 {
 787         int i;
 788         byte *lmplabel;
 789         lmplabel = MSG_ReadString();
 790         for (i = 0;i < SHOWLMP_MAXLABELS;i++)
 791                 if (showlmp[i].isactive && strcmp(showlmp[i].label, lmplabel) == 0)
 792                 {
 793                         showlmp[i].isactive = false;
 794                         return;
 795                 }
 796 }
 797
 798 void SHOWLMP_decodeshow()
 799 {
 800         int i, k;
 801         byte lmplabel[256], picname[256];
 802         float x, y;
 803         strcpy(lmplabel,MSG_ReadString());
 804         strcpy(picname, MSG_ReadString());
 805         x = MSG_ReadByte();
 806         y = MSG_ReadByte();
 807         k = -1;
 808         for (i = 0;i < SHOWLMP_MAXLABELS;i++)
 809                 if (showlmp[i].isactive)
 810                 {
 811                         if (strcmp(showlmp[i].label, lmplabel) == 0)
 812                         {
 813                                 k = i;
 814                                 break; // drop out to replace it
 815                         }
 816                 }
 817                 else if (k < 0) // find first empty one to replace
 818                         k = i;
 819         if (k < 0)
 820                 return; // none found to replace
 821         // change existing one
 822         showlmp[k].isactive = true;
 823         strcpy(showlmp[k].label, lmplabel);
 824         strcpy(showlmp[k].pic, picname);
 825         showlmp[k].x = x;
 826         showlmp[k].y = y;
 827 }
 828
 829 void SHOWLMP_drawall()
 830 {
 831         int i;
 832         for (i = 0;i < SHOWLMP_MAXLABELS;i++)
 833                 if (showlmp[i].isactive)
 834                         Draw_TransPic(showlmp[i].x, showlmp[i].y, Draw_CachePic(showlmp[i].pic));
 835 }
 836
 837 void SHOWLMP_clear()
 838 {
 839         int i;
 840         for (i = 0;i < SHOWLMP_MAXLABELS;i++)
 841                 showlmp[i].isactive = false;
 842 }
 843
 844 //====================================================================
 845
 846 /*
 847 ================
 848 GL_FindTexture
 849 ================
 850 */
 851 int GL_FindTexture (char *identifier)
 852 {
 853         int             i;
 854         gltexture_t     *glt;
 855
 856         for (i=0, glt=gltextures ; i<numgltextures ; i++, glt++)
 857         {
 858                 if (!strcmp (identifier, glt->identifier))
 859                         return gltextures[i].texnum;
 860         }
 861
 862         return -1;
 863 }
 864
 865 extern byte qgamma[];
 866
 867 // LordHavoc: gamma correction and improved resampling
 868 void GL_ResampleTextureLerpLine (byte *in, byte *out, int inwidth, int outwidth)
 869 {
 870         int             j, xi, oldx = 0;
 871         float   f, fstep, l1, l2;
 872         fstep = (float) inwidth/outwidth;
 873         for (j = 0,f = 0;j < outwidth;j++, f += fstep)
 874         {
 875                 xi = (int) f;
 876                 if (xi != oldx)
 877                 {
 878                         in += (xi - oldx) * 4;
 879                         oldx = xi;
 880                 }
 881                 if (xi < (inwidth-1))
 882                 {
 883                         l2 = f - xi;
 884                         l1 = 1 - l2;
 885                         *out++ = qgamma[(byte) (in[0] * l1 + in[4] * l2)];
 886                         *out++ = qgamma[(byte) (in[1] * l1 + in[5] * l2)];
 887                         *out++ = qgamma[(byte) (in[2] * l1 + in[6] * l2)];
 888                         *out++ =        (byte) (in[3] * l1 + in[7] * l2) ;
 889                 }
 890                 else // last pixel of the line has no pixel to lerp to
 891                 {
 892                         *out++ = qgamma[in[0]];
 893                         *out++ = qgamma[in[1]];
 894                         *out++ = qgamma[in[2]];
 895                         *out++ =        in[3] ;
 896                 }
 897         }
 898 }
 899
 900 /*
 901 ================
 902 GL_ResampleTexture
 903 ================
 904 */
 905 void GL_ResampleTexture (void *indata, int inwidth, int inheight, void *outdata,  int outwidth, int outheight)
 906 {
 907         // LordHavoc: gamma correction and greatly improved resampling
 908         if (gl_lerpimages.value)
 909         {
 910                 int             i, j, yi, oldy;
 911                 byte    *inrow, *out, *row1, *row2;
 912                 float   f, fstep, l1, l2;
 913                 out = outdata;
 914                 fstep = (float) inheight/outheight;
 915
 916                 row1 = malloc(outwidth*4);
 917                 row2 = malloc(outwidth*4);
 918                 inrow = indata;
 919                 oldy = 0;
 920                 GL_ResampleTextureLerpLine (inrow, row1, inwidth, outwidth);
 921                 GL_ResampleTextureLerpLine (inrow + inwidth*4, row2, inwidth, outwidth);
 922                 for (i = 0, f = 0;i < outheight;i++,f += fstep)
 923                 {
 924                         yi = (int) f;
 925                         if (yi != oldy)
 926                         {
 927                                 inrow = (byte *)((int)indata + inwidth*4*yi);
 928                                 if (yi == oldy+1)
 929                                         memcpy(row1, row2, outwidth*4);
 930                                 else
 931                                         GL_ResampleTextureLerpLine (inrow, row1, inwidth, outwidth);
 932                                 if (yi < (inheight-1))
 933                                         GL_ResampleTextureLerpLine (inrow + inwidth*4, row2, inwidth, outwidth);
 934                                 else
 935                                         memcpy(row2, row1, outwidth*4);
 936                                 oldy = yi;
 937                         }
 938                         if (yi < (inheight-1))
 939                         {
 940                                 l2 = f - yi;
 941                                 l1 = 1 - l2;
 942                                 for (j = 0;j < outwidth;j++)
 943                                 {
 944                                         *out++ = (byte) (*row1++ * l1 + *row2++ * l2);
 945                                         *out++ = (byte) (*row1++ * l1 + *row2++ * l2);
 946                                         *out++ = (byte) (*row1++ * l1 + *row2++ * l2);
 947                                         *out++ = (byte) (*row1++ * l1 + *row2++ * l2);
 948                                 }
 949                                 row1 -= outwidth*4;
 950                                 row2 -= outwidth*4;
 951                         }
 952                         else // last line has no pixels to lerp to
 953                         {
 954                                 for (j = 0;j < outwidth;j++)
 955                                 {
 956                                         *out++ = *row1++;
 957                                         *out++ = *row1++;
 958                                         *out++ = *row1++;
 959                                         *out++ = *row1++;
 960                                 }
 961                                 row1 -= outwidth*4;
 962                         }
 963                 }
 964                 free(row1);
 965                 free(row2);
 966         }
 967         else
 968         {
 969                 int             i, j;
 970                 unsigned        frac, fracstep;
 971                 byte    *inrow, *out, *inpix;
 972                 out = outdata;
 973
 974                 fracstep = inwidth*0x10000/outwidth;
 975                 for (i=0 ; i<outheight ; i++)
 976                 {
 977                         inrow = (byte *)indata + inwidth*(i*inheight/outheight)*4;
 978                         frac = fracstep >> 1;
 979                         for (j=0 ; j<outwidth ; j+=4)
 980                         {
 981                                 inpix = inrow + ((frac >> 14) & ~3);*out++ = qgamma[*inpix++];*out++ = qgamma[*inpix++];*out++ = qgamma[*inpix++];*out++ =       *inpix++ ;frac += fracstep;
 982                                 inpix = inrow + ((frac >> 14) & ~3);*out++ = qgamma[*inpix++];*out++ = qgamma[*inpix++];*out++ = qgamma[*inpix++];*out++ =       *inpix++ ;frac += fracstep;
 983                                 inpix = inrow + ((frac >> 14) & ~3);*out++ = qgamma[*inpix++];*out++ = qgamma[*inpix++];*out++ = qgamma[*inpix++];*out++ =       *inpix++ ;frac += fracstep;
 984                                 inpix = inrow + ((frac >> 14) & ~3);*out++ = qgamma[*inpix++];*out++ = qgamma[*inpix++];*out++ = qgamma[*inpix++];*out++ =       *inpix++ ;frac += fracstep;
 985                         }
 986                 }
 987         }
 988 }
 989
 990 /*
 991 ================
 992 GL_Resample8BitTexture -- JACK
 993 ================
 994 */
 995 void GL_Resample8BitTexture (unsigned char *in, int inwidth, int inheight, unsigned char *out,  int outwidth, int outheight)
 996 {
 997         int             i, j;
 998         unsigned        char *inrow;
 999         unsigned        frac, fracstep;
1000
1001         fracstep = inwidth*0x10000/outwidth;
1002         for (i=0 ; i<outheight ; i++, out += outwidth)
1003         {
1004                 inrow = in + inwidth*(i*inheight/outheight);
1005                 frac = fracstep >> 1;
1006                 for (j=0 ; j<outwidth ; j+=4)
1007                 {
1008                         out[j] = inrow[frac>>16];
1009                         frac += fracstep;
1010                         out[j+1] = inrow[frac>>16];
1011                         frac += fracstep;
1012                         out[j+2] = inrow[frac>>16];
1013                         frac += fracstep;
1014                         out[j+3] = inrow[frac>>16];
1015                         frac += fracstep;
1016                 }
1017         }
1018 }
1019
1020
1021 /*
1022 ================
1023 GL_MipMap
1024
1025 Operates in place, quartering the size of the texture
1026 ================
1027 */
1028 void GL_MipMap (byte *in, int width, int height)
1029 {
1030         int             i, j;
1031         byte    *out;
1032
1033         width <<=2;
1034         height >>= 1;
1035         out = in;
1036         for (i=0 ; i<height ; i++, in+=width)
1037         {
1038                 for (j=0 ; j<width ; j+=8, out+=4, in+=8)
1039                 {
1040                         out[0] = (in[0] + in[4] + in[width+0] + in[width+4])>>2;
1041                         out[1] = (in[1] + in[5] + in[width+1] + in[width+5])>>2;
1042                         out[2] = (in[2] + in[6] + in[width+2] + in[width+6])>>2;
1043                         out[3] = (in[3] + in[7] + in[width+3] + in[width+7])>>2;
1044                 }
1045         }
1046 }
1047
1048 /*
1049 ================
1050 GL_MipMap8Bit
1051
1052 Mipping for 8 bit textures
1053 ================
1054 */
1055 void GL_MipMap8Bit (byte *in, int width, int height)
1056 {
1057         int             i, j;
1058         unsigned short     r,g,b;
1059         byte    *out, *at1, *at2, *at3, *at4;
1060
1061         height >>= 1;
1062         out = in;
1063         for (i=0 ; i<height ; i++, in+=width)
1064         {
1065                 for (j=0 ; j<width ; j+=2, out+=1, in+=2)
1066                 {
1067                         at1 = (byte *) (d_8to24table + in[0]);
1068                         at2 = (byte *) (d_8to24table + in[1]);
1069                         at3 = (byte *) (d_8to24table + in[width+0]);
1070                         at4 = (byte *) (d_8to24table + in[width+1]);
1071
1072                         r = (at1[0]+at2[0]+at3[0]+at4[0]); r>>=5;
1073                         g = (at1[1]+at2[1]+at3[1]+at4[1]); g>>=5;
1074                         b = (at1[2]+at2[2]+at3[2]+at4[2]); b>>=5;
1075
1076                         out[0] = d_15to8table[(r<<0) + (g<<5) + (b<<10)];
1077                 }
1078         }
1079 }
1080
1081 /*
1082 ===============
1083 GL_Upload32
1084 ===============
1085 */
1086 void GL_Upload32 (void *data, int width, int height,  qboolean mipmap, qboolean alpha)
1087 {
1088         int samples, scaled_width, scaled_height, i;
1089         byte *in, *out, *scaled;
1090
1091         for (scaled_width = 1 ; scaled_width < width ; scaled_width<<=1)
1092                 ;
1093         for (scaled_height = 1 ; scaled_height < height ; scaled_height<<=1)
1094                 ;
1095
1096         scaled_width >>= (int)gl_picmip.value;
1097         scaled_height >>= (int)gl_picmip.value;
1098
1099         if (scaled_width > gl_max_size.value)
1100                 scaled_width = gl_max_size.value;
1101         if (scaled_height > gl_max_size.value)
1102                 scaled_height = gl_max_size.value;
1103
1104         if (alpha)
1105         {
1106                 alpha = false;
1107                 in = data;
1108                 for (i = 3;i < width*height*4;i += 4)
1109                         if (in[i] != 255)
1110                         {
1111                                 alpha = true;
1112                                 break;
1113                         }
1114         }
1115
1116         samples = alpha ? gl_alpha_format : gl_solid_format;
1117
1118 #if 0
1119         if (mipmap)
1120                 gluBuild2DMipmaps (GL_TEXTURE_2D, samples, width, height, GL_RGBA, GL_UNSIGNED_BYTE, scaled);
1121         else if (scaled_width == width && scaled_height == height)
1122                 glTexImage2D (GL_TEXTURE_2D, 0, samples, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, scaled);
1123         else
1124         {
1125                 gluScaleImage (GL_RGBA, width, height, GL_UNSIGNED_BYTE, scaled, scaled_width, scaled_height, GL_UNSIGNED_BYTE, scaled);
1126                 glTexImage2D (GL_TEXTURE_2D, 0, samples, scaled_width, scaled_height, 0, GL_RGBA, GL_UNSIGNED_BYTE, scaled);
1127         }
1128 #else
1129 texels += scaled_width * scaled_height;
1130
1131         scaled = malloc(scaled_width*scaled_height*4);
1132         if (scaled_width == width && scaled_height == height)
1133         {
1134                 // LordHavoc: gamma correct while copying
1135                 in = (byte *)data;
1136                 out = (byte *)scaled;
1137                 for (i = 0;i < width*height;i++)
1138                 {
1139                         *out++ = qgamma[*in++];
1140                         *out++ = qgamma[*in++];
1141                         *out++ = qgamma[*in++];
1142                         *out++ = *in++;
1143                 }
1144         }
1145         else
1146                 GL_ResampleTexture (data, width, height, scaled, scaled_width, scaled_height);
1147
1148         glTexImage2D (GL_TEXTURE_2D, 0, samples, scaled_width, scaled_height, 0, GL_RGBA, GL_UNSIGNED_BYTE, scaled);
1149         if (mipmap)
1150         {
1151                 int             miplevel;
1152
1153                 miplevel = 0;
1154                 while (scaled_width > 1 || scaled_height > 1)
1155                 {
1156                         GL_MipMap ((byte *)scaled, scaled_width, scaled_height);
1157                         scaled_width >>= 1;
1158                         scaled_height >>= 1;
1159                         if (scaled_width < 1)
1160                                 scaled_width = 1;
1161                         if (scaled_height < 1)
1162                                 scaled_height = 1;
1163                         miplevel++;
1164                         glTexImage2D (GL_TEXTURE_2D, miplevel, samples, scaled_width, scaled_height, 0, GL_RGBA, GL_UNSIGNED_BYTE, scaled);
1165                 }
1166         }
1167 #endif
1168
1169
1170         if (mipmap)
1171         {
1172                 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl_filter_min);
1173                 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, gl_filter_max);
1174         }
1175         else
1176         {
1177                 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl_filter_max);
1178                 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, gl_filter_max);
1179         }
1180         free(scaled);
1181 }
1182
1183 void GL_Upload8_EXT (byte *data, int width, int height,  qboolean mipmap)
1184 {
1185         int             scaled_width, scaled_height;
1186         byte    *scaled = NULL;
1187
1188         for (scaled_width = 1 ; scaled_width < width ; scaled_width<<=1)
1189                 ;
1190         for (scaled_height = 1 ; scaled_height < height ; scaled_height<<=1)
1191                 ;
1192
1193         scaled_width >>= (int)gl_picmip.value;
1194         scaled_height >>= (int)gl_picmip.value;
1195
1196         if (scaled_width > gl_max_size.value)
1197                 scaled_width = gl_max_size.value;
1198         if (scaled_height > gl_max_size.value)
1199                 scaled_height = gl_max_size.value;
1200
1201         texels += scaled_width * scaled_height;
1202
1203         if (scaled_width == width && scaled_height == height)
1204         {
1205                 if (!mipmap)
1206                 {
1207                         glTexImage2D (GL_TEXTURE_2D, 0, GL_COLOR_INDEX8_EXT, scaled_width, scaled_height, 0, GL_COLOR_INDEX , GL_UNSIGNED_BYTE, data);
1208                         goto done;
1209                 }
1210                 scaled = malloc(scaled_width*scaled_height*4);
1211                 memcpy (scaled, data, width*height);
1212         }
1213         else
1214         {
1215                 scaled = malloc(scaled_width*scaled_height*4);
1216                 GL_Resample8BitTexture (data, width, height, (void*) scaled, scaled_width, scaled_height);
1217         }
1218
1219         glTexImage2D (GL_TEXTURE_2D, 0, GL_COLOR_INDEX8_EXT, scaled_width, scaled_height, 0, GL_COLOR_INDEX, GL_UNSIGNED_BYTE, scaled);
1220         if (mipmap)
1221         {
1222                 int             miplevel;
1223
1224                 miplevel = 0;
1225                 while (scaled_width > 1 || scaled_height > 1)
1226                 {
1227                         GL_MipMap8Bit ((byte *)scaled, scaled_width, scaled_height);
1228                         scaled_width >>= 1;
1229                         scaled_height >>= 1;
1230                         if (scaled_width < 1)
1231                                 scaled_width = 1;
1232                         if (scaled_height < 1)
1233                                 scaled_height = 1;
1234                         miplevel++;
1235                         glTexImage2D (GL_TEXTURE_2D, miplevel, GL_COLOR_INDEX8_EXT, scaled_width, scaled_height, 0, GL_COLOR_INDEX, GL_UNSIGNED_BYTE, scaled);
1236                 }
1237         }
1238 done: ;
1239
1240
1241         if (mipmap)
1242         {
1243                 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl_filter_min);
1244                 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, gl_filter_max);
1245         }
1246         else
1247         {
1248                 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl_filter_max);
1249                 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, gl_filter_max);
1250         }
1251         free(scaled);
1252 }
1253
1254 qboolean VID_Is8bit();
1255
1256 /*
1257 ===============
1258 GL_Upload8
1259 ===============
1260 */
1261 void GL_Upload8 (byte *data, int width, int height,  qboolean mipmap, qboolean alpha)
1262 {
1263         static  unsigned *trans;
1264         int                     i, s;
1265         qboolean        noalpha;
1266         int                     p;
1267         byte    *indata;
1268         int             *outdata;
1269
1270         s = width*height;
1271         trans = malloc(s*4);
1272         // if there are no transparent pixels, make it a 3 component
1273         // texture even if it was specified as otherwise
1274         if (alpha)
1275         {
1276                 noalpha = true;
1277                 for (i=0 ; i<s ; i++)
1278                 {
1279                         p = data[i];
1280                         if (p != 255)
1281                                 trans[i] = d_8to24table[p];
1282                         else
1283                         {
1284                                 trans[i] = 0; // force to black
1285                                 noalpha = false;
1286                         }
1287                 }
1288
1289                 if (noalpha)
1290                 {
1291                         if (VID_Is8bit() && (data!=scrap_texels[0]))
1292                         {
1293                                 GL_Upload8_EXT (data, width, height, mipmap);
1294                                 free(trans);
1295                                 return;
1296                         }
1297                         alpha = false;
1298                 }
1299         }
1300         else
1301         {
1302                 // LordHavoc: dodge the copy if it will be uploaded as 8bit
1303                 if (VID_Is8bit() && (data!=scrap_texels[0]))
1304                 {
1305                         GL_Upload8_EXT (data, width, height, mipmap);
1306                         free(trans);
1307                         return;
1308                 }
1309                 //if (s&3)
1310                 //      Sys_Error ("GL_Upload8: s&3");
1311                 indata = data;
1312                 outdata = trans;
1313                 if (s&1)
1314                         *outdata++ = d_8to24table[*indata++];
1315                 if (s&2)
1316                 {
1317                         *outdata++ = d_8to24table[*indata++];
1318                         *outdata++ = d_8to24table[*indata++];
1319                 }
1320                 for (i = 0;i < s;i+=4)
1321                 {
1322                         *outdata++ = d_8to24table[*indata++];
1323                         *outdata++ = d_8to24table[*indata++];
1324                         *outdata++ = d_8to24table[*indata++];
1325                         *outdata++ = d_8to24table[*indata++];
1326                 }
1327         }
1328
1329         GL_Upload32 (trans, width, height, mipmap, alpha);
1330         free(trans);
1331 }
1332
1333 /*
1334 ================
1335 GL_LoadTexture
1336 ================
1337 */
1338 int GL_LoadTexture (char *identifier, int width, int height, byte *data, qboolean mipmap, qboolean alpha, int bytesperpixel)
1339 {
1340         unsigned short  crc;
1341         int                             i;
1342         gltexture_t             *glt;
1343
1344         if (isDedicated)
1345                 return 1;
1346
1347         // LordHavoc: do a CRC to confirm the data really is the same as previous occurances.
1348         crc = CRC_Block(data, width*height*bytesperpixel);
1349         // see if the texture is already present
1350         if (identifier[0])
1351         {
1352                 for (i=0, glt=gltextures ; i<numgltextures ; i++, glt++)
1353                 {
1354                         if (!strcmp (identifier, glt->identifier))
1355                         {
1356                                 // LordHavoc: everyone hates cache mismatchs, so I fixed it
1357                                 if (crc != glt->crc || width != glt->width || height != glt->height)
1358                                 {
1359                                         Con_DPrintf("GL_LoadTexture: cache mismatch, replacing old texture\n");
1360                                         goto GL_LoadTexture_setup; // drop out with glt pointing to the texture to replace
1361                                         //Sys_Error ("GL_LoadTexture: cache mismatch");
1362                                 }
1363                                 if ((gl_lerpimages.value != 0) != glt->lerped)
1364                                         goto GL_LoadTexture_setup; // drop out with glt pointing to the texture to replace
1365                                 return glt->texnum;
1366                         }
1367                 }
1368         }
1369         // LordHavoc: although this could be an else condition as it was in the original id code,
1370         //            it is more clear this way
1371         // LordHavoc: check if there are still slots available
1372         if (numgltextures >= MAX_GLTEXTURES)
1373                 Sys_Error ("GL_LoadTexture: ran out of texture slots (%d)\n", MAX_GLTEXTURES);
1374         glt = &gltextures[numgltextures++];
1375
1376         strcpy (glt->identifier, identifier);
1377         glt->texnum = texture_extension_number;
1378         texture_extension_number++;
1379 // LordHavoc: label to drop out of the loop into the setup code
1380 GL_LoadTexture_setup:
1381         glt->crc = crc; // LordHavoc: used to verify textures are identical
1382         glt->width = width;
1383         glt->height = height;
1384         glt->mipmap = mipmap;
1385         glt->bytesperpixel = bytesperpixel;
1386         glt->lerped = gl_lerpimages.value != 0;
1387
1388         glBindTexture(GL_TEXTURE_2D, glt->texnum);
1389
1390         if (bytesperpixel == 1) // 8bit
1391                 GL_Upload8 (data, width, height, mipmap, alpha);
1392         else // 32bit
1393                 GL_Upload32 (data, width, height, mipmap, true);
1394         glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
1395
1396         return glt->texnum;
1397 }
1398
1399 /*
1400 ================
1401 GL_LoadPicTexture
1402 ================
1403 */
1404 int GL_LoadPicTexture (qpic_t *pic)
1405 {
1406         return GL_LoadTexture ("", pic->width, pic->height, pic->data, false, true, 1);
1407 }
1408
1409 int GL_GetTextureSlots (int count)
1410 {
1411         gltexture_t             *glt, *first;
1412
1413         first = glt = &gltextures[numgltextures];
1414         while (count--)
1415         {
1416                 glt->identifier[0] = 0;
1417                 glt->texnum = texture_extension_number++;
1418                 glt->crc = 0;
1419                 glt->width = 0;
1420                 glt->height = 0;
1421                 glt->bytesperpixel = 0;
1422                 glt++;
1423                 numgltextures++;
1424         }
1425         return first->texnum;
1426 }