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 #include "quakedef.h"
  22 #include "image.h"
  23
  24 static rtexture_t *char_texture;
  25
  26 //=============================================================================
  27 /* Support Routines */
  28
  29 #define MAX_CACHED_PICS 256
  30 #define CACHEPICHASHSIZE 256
  31 static cachepic_t *cachepichash[CACHEPICHASHSIZE];
  32 static cachepic_t cachepics[MAX_CACHED_PICS];
  33 static int numcachepics;
  34
  35 static rtexturepool_t *drawtexturepool;
  36
  37 static qbyte pointerimage[256] =
  38 {
  39         "333333332......."
  40         "26777761........"
  41         "2655541........."
  42         "265541.........."
  43         "2654561........."
  44         "26414561........"
  45         "251.14561......."
  46         "21...14561......"
  47         "1.....141......."
  48         ".......1........"
  49         "................"
  50         "................"
  51         "................"
  52         "................"
  53         "................"
  54         "................"
  55 };
  56
  57 static rtexture_t *draw_generatemousepointer(void)
  58 {
  59         int i;
  60         qbyte buffer[256][4];
  61         for (i = 0;i < 256;i++)
  62         {
  63                 if (pointerimage[i] == '.')
  64                 {
  65                         buffer[i][0] = 0;
  66                         buffer[i][1] = 0;
  67                         buffer[i][2] = 0;
  68                         buffer[i][3] = 0;
  69                 }
  70                 else
  71                 {
  72                         buffer[i][0] = (pointerimage[i] - '0') * 16;
  73                         buffer[i][1] = (pointerimage[i] - '0') * 16;
  74                         buffer[i][2] = (pointerimage[i] - '0') * 16;
  75                         buffer[i][3] = 255;
  76                 }
  77         }
  78         return R_LoadTexture2D(drawtexturepool, "mousepointer", 16, 16, &buffer[0][0], TEXTYPE_RGBA, TEXF_ALPHA | TEXF_PRECACHE, NULL);
  79 }
  80
  81 // must match NUMCROSSHAIRS in r_crosshairs.c
  82 #define NUMCROSSHAIRS 5
  83
  84 static qbyte *crosshairtexdata[NUMCROSSHAIRS] =
  85 {
  86         "................"
  87         "................"
  88         "................"
  89         "...33......33..."
  90         "...355....553..."
  91         "....577..775...."
  92         ".....77..77....."
  93         "................"
  94         "................"
  95         ".....77..77....."
  96         "....577..775...."
  97         "...355....553..."
  98         "...33......33..."
  99         "................"
 100         "................"
 101         "................"
 102         ,
 103         "................"
 104         "................"
 105         "................"
 106         "...3........3..."
 107         "....5......5...."
 108         ".....7....7....."
 109         "......7..7......"
 110         "................"
 111         "................"
 112         "......7..7......"
 113         ".....7....7....."
 114         "....5......5...."
 115         "...3........3..."
 116         "................"
 117         "................"
 118         "................"
 119         ,
 120         "................"
 121         ".......77......."
 122         ".......77......."
 123         "................"
 124         "................"
 125         ".......44......."
 126         ".......44......."
 127         ".77..44..44..77."
 128         ".77..44..44..77."
 129         ".......44......."
 130         ".......44......."
 131         "................"
 132         ".......77......."
 133         ".......77......."
 134         "................"
 135         "................"
 136         ,
 137         "................"
 138         "................"
 139         "................"
 140         "................"
 141         "................"
 142         "................"
 143         "................"
 144         "................"
 145         "........7777777."
 146         "........752....."
 147         "........72......"
 148         "........7......."
 149         "........7......."
 150         "........7......."
 151         "................"
 152         "................"
 153         ,
 154         "................"
 155         "................"
 156         "................"
 157         "................"
 158         "................"
 159         "........7......."
 160         "................"
 161         "........4......."
 162         ".....7.4.4.7...."
 163         "........4......."
 164         "................"
 165         "........7......."
 166         "................"
 167         "................"
 168         "................"
 169         "................"
 170 };
 171
 172 static rtexture_t *draw_generatecrosshair(int num)
 173 {
 174         int i;
 175         char *in;
 176         qbyte data[16*16][4];
 177         in = crosshairtexdata[num];
 178         for (i = 0;i < 16*16;i++)
 179         {
 180                 if (in[i] == '.')
 181                 {
 182                         data[i][0] = 255;
 183                         data[i][1] = 255;
 184                         data[i][2] = 255;
 185                         data[i][3] = 0;
 186                 }
 187                 else
 188                 {
 189                         data[i][0] = 255;
 190                         data[i][1] = 255;
 191                         data[i][2] = 255;
 192                         data[i][3] = (qbyte) ((int) (in[i] - '0') * 255 / 7);
 193                 }
 194         }
 195         return R_LoadTexture2D(drawtexturepool, va("crosshair%i", num), 16, 16, &data[0][0], TEXTYPE_RGBA, TEXF_ALPHA | TEXF_PRECACHE, NULL);
 196 }
 197
 198 static rtexture_t *draw_generateditherpattern(void)
 199 {
 200 #if 1
 201         int x, y;
 202         qbyte data[8*8*4];
 203         for (y = 0;y < 8;y++)
 204         {
 205                 for (x = 0;x < 8;x++)
 206                 {
 207                         data[(y*8+x)*4+0] = data[(y*8+x)*4+1] = data[(y*8+x)*4+2] = ((x^y) & 4) ? 255 : 0;
 208                         data[(y*8+x)*4+3] = 255;
 209                 }
 210         }
 211         return R_LoadTexture2D(drawtexturepool, "ditherpattern", 8, 8, data, TEXTYPE_RGBA, TEXF_FORCENEAREST | TEXF_PRECACHE, NULL);
 212 #else
 213         qbyte data[16];
 214         memset(data, 255, sizeof(data));
 215         data[0] = data[1] = data[2] = data[12] = data[13] = data[14] = 0;
 216         return R_LoadTexture2D(drawtexturepool, "ditherpattern", 2, 2, data, TEXTYPE_RGBA, TEXF_FORCENEAREST | TEXF_PRECACHE, NULL);
 217 #endif
 218 }
 219
 220 /*
 221 ================
 222 Draw_CachePic
 223 ================
 224 */
 225 // FIXME: move this to client somehow
 226 cachepic_t      *Draw_CachePic (char *path)
 227 {
 228         int i, crc, hashkey;
 229         cachepic_t *pic;
 230         qpic_t *p;
 231
 232         crc = CRC_Block(path, strlen(path));
 233         hashkey = ((crc >> 8) ^ crc) % CACHEPICHASHSIZE;
 234         for (pic = cachepichash[hashkey];pic;pic = pic->chain)
 235                 if (!strcmp (path, pic->name))
 236                         return pic;
 237
 238         if (numcachepics == MAX_CACHED_PICS)
 239                 Sys_Error ("numcachepics == MAX_CACHED_PICS");
 240         pic = cachepics + (numcachepics++);
 241         strcpy (pic->name, path);
 242         // link into list
 243         pic->chain = cachepichash[hashkey];
 244         cachepichash[hashkey] = pic;
 245
 246         // load the pic from disk
 247         pic->tex = loadtextureimage(drawtexturepool, path, 0, 0, false, TEXF_ALPHA | TEXF_PRECACHE);
 248         if (pic->tex == NULL && !strncmp(path, "gfx/", 4))
 249         {
 250                 // compatibility with older versions
 251                 pic->tex = loadtextureimage(drawtexturepool, path + 4, 0, 0, false, TEXF_ALPHA | TEXF_PRECACHE);
 252                 // failed to find gfx/whatever.tga or similar, try the wad
 253                 if (pic->tex == NULL && (p = W_GetLumpName (path + 4)))
 254                 {
 255                         if (!strcmp(path, "gfx/conchars"))
 256                         {
 257                                 qbyte *pix;
 258                                 // conchars is a raw image and with the wrong transparent color
 259                                 pix = (qbyte *)p;
 260                                 for (i = 0;i < 128 * 128;i++)
 261                                         if (pix[i] == 0)
 262                                                 pix[i] = 255;
 263                                 pic->tex = R_LoadTexture2D(drawtexturepool, path, 128, 128, pix, TEXTYPE_PALETTE, TEXF_ALPHA | TEXF_PRECACHE, palette_complete);
 264                         }
 265                         else
 266                                 pic->tex = R_LoadTexture2D(drawtexturepool, path, p->width, p->height, p->data, TEXTYPE_PALETTE, TEXF_ALPHA | TEXF_PRECACHE, palette_complete);
 267                 }
 268         }
 269         if (pic->tex == NULL && !strcmp(path, "ui/mousepointer.tga"))
 270                 pic->tex = draw_generatemousepointer();
 271         if (pic->tex == NULL && !strcmp(path, "gfx/crosshair1.tga"))
 272                 pic->tex = draw_generatecrosshair(0);
 273         if (pic->tex == NULL && !strcmp(path, "gfx/crosshair2.tga"))
 274                 pic->tex = draw_generatecrosshair(1);
 275         if (pic->tex == NULL && !strcmp(path, "gfx/crosshair3.tga"))
 276                 pic->tex = draw_generatecrosshair(2);
 277         if (pic->tex == NULL && !strcmp(path, "gfx/crosshair4.tga"))
 278                 pic->tex = draw_generatecrosshair(3);
 279         if (pic->tex == NULL && !strcmp(path, "gfx/crosshair5.tga"))
 280                 pic->tex = draw_generatecrosshair(4);
 281         if (pic->tex == NULL && !strcmp(path, "gfx/colorcontrol/ditherpattern.tga"))
 282                 pic->tex = draw_generateditherpattern();
 283         if (pic->tex == NULL)
 284         {
 285                 Con_Printf("Draw_CachePic: failed to load %s\n", path);
 286                 pic->tex = r_notexture;
 287         }
 288
 289         pic->width = R_TextureWidth(pic->tex);
 290         pic->height = R_TextureHeight(pic->tex);
 291         return pic;
 292 }
 293
 294 cachepic_t *Draw_NewPic(char *picname, int width, int height, int alpha, qbyte *pixels)
 295 {
 296         int crc, hashkey;
 297         cachepic_t *pic;
 298
 299         crc = CRC_Block(picname, strlen(picname));
 300         hashkey = ((crc >> 8) ^ crc) % CACHEPICHASHSIZE;
 301         for (pic = cachepichash[hashkey];pic;pic = pic->chain)
 302                 if (!strcmp (picname, pic->name))
 303                         break;
 304
 305         if (pic)
 306         {
 307                 if (pic->tex && pic->width == width && pic->height == height)
 308                 {
 309                         R_UpdateTexture(pic->tex, pixels);
 310                         return pic;
 311                 }
 312         }
 313         else
 314         {
 315                 if (pic == NULL)
 316                 {
 317                         if (numcachepics == MAX_CACHED_PICS)
 318                                 Sys_Error ("numcachepics == MAX_CACHED_PICS");
 319                         pic = cachepics + (numcachepics++);
 320                         strcpy (pic->name, picname);
 321                         // link into list
 322                         pic->chain = cachepichash[hashkey];
 323                         cachepichash[hashkey] = pic;
 324                 }
 325         }
 326
 327         pic->width = width;
 328         pic->height = height;
 329         if (pic->tex)
 330                 R_FreeTexture(pic->tex);
 331         pic->tex = R_LoadTexture2D(drawtexturepool, picname, width, height, pixels, TEXTYPE_RGBA, alpha ? TEXF_ALPHA : 0, NULL);
 332         return pic;
 333 }
 334
 335 void Draw_FreePic(char *picname)
 336 {
 337         int crc;
 338         int hashkey;
 339         cachepic_t *pic;
 340         // this doesn't really free the pic, but does free it's texture
 341         crc = CRC_Block(picname, strlen(picname));
 342         hashkey = ((crc >> 8) ^ crc) % CACHEPICHASHSIZE;
 343         for (pic = cachepichash[hashkey];pic;pic = pic->chain)
 344         {
 345                 if (!strcmp (picname, pic->name) && pic->tex)
 346                 {
 347                         R_FreeTexture(pic->tex);
 348                         pic->width = 0;
 349                         pic->height = 0;
 350                         return;
 351                 }
 352         }
 353 }
 354
 355 /*
 356 ===============
 357 Draw_Init
 358 ===============
 359 */
 360 static void gl_draw_start(void)
 361 {
 362         drawtexturepool = R_AllocTexturePool();
 363
 364         numcachepics = 0;
 365         memset(cachepichash, 0, sizeof(cachepichash));
 366
 367         char_texture = Draw_CachePic("gfx/conchars")->tex;
 368 }
 369
 370 static void gl_draw_shutdown(void)
 371 {
 372         R_FreeTexturePool(&drawtexturepool);
 373
 374         numcachepics = 0;
 375         memset(cachepichash, 0, sizeof(cachepichash));
 376 }
 377
 378 static void gl_draw_newmap(void)
 379 {
 380 }
 381
 382 void GL_Draw_Init (void)
 383 {
 384         numcachepics = 0;
 385         memset(cachepichash, 0, sizeof(cachepichash));
 386
 387         R_RegisterModule("GL_Draw", gl_draw_start, gl_draw_shutdown, gl_draw_newmap);
 388 }
 389
 390 float blendvertex3f[9] = {-5000, -5000, 10, 10000, -5000, 10, -5000, 10000, 10};
 391
 392 int quadelements[768];
 393 void R_DrawQueue(void)
 394 {
 395         int pos, num, chartexnum, texnum, batch;
 396         float x, y, w, h, s, t, u, v, *av, *at, c[4];
 397         cachepic_t *pic;
 398         drawqueue_t *dq;
 399         char *str, *currentpic;
 400         int batchcount;
 401         unsigned int color;
 402         drawqueuemesh_t *mesh;
 403         rmeshstate_t m;
 404
 405         if (!r_render.integer)
 406                 return;
 407
 408         if (!quadelements[1])
 409         {
 410                 // elements for rendering a series of quads as triangles
 411                 for (batch = 0, pos = 0, num = 0;batch < 128;batch++, num += 4)
 412                 {
 413                         quadelements[pos++] = num;
 414                         quadelements[pos++] = num + 1;
 415                         quadelements[pos++] = num + 2;
 416                         quadelements[pos++] = num;
 417                         quadelements[pos++] = num + 2;
 418                         quadelements[pos++] = num + 3;
 419                 }
 420         }
 421         qglViewport(0, 0, vid.realwidth, vid.realheight);
 422         GL_SetupView_Mode_Ortho(0, 0, vid.conwidth, vid.conheight, -10, 100);
 423         qglDepthFunc(GL_LEQUAL);
 424         R_Mesh_Matrix(&r_identitymatrix);
 425
 426         chartexnum = R_GetTexture(char_texture);
 427
 428         memset(&m, 0, sizeof(m));
 429
 430         currentpic = "";
 431         pic = NULL;
 432         texnum = 0;
 433         color = 0;
 434         GL_ColorPointer(NULL);
 435         GL_Color(1,1,1,1);
 436
 437         batch = false;
 438         batchcount = 0;
 439         for (pos = 0;pos < r_refdef.drawqueuesize;pos += ((drawqueue_t *)(r_refdef.drawqueue + pos))->size)
 440         {
 441                 dq = (drawqueue_t *)(r_refdef.drawqueue + pos);
 442                 color = dq->color;
 443
 444                 if(dq->flags == DRAWFLAG_ADDITIVE)
 445                         GL_BlendFunc(GL_SRC_ALPHA, GL_ONE);
 446                 else if(dq->flags == DRAWFLAG_MODULATE)
 447                         GL_BlendFunc(GL_DST_COLOR, GL_ZERO);
 448                 else if(dq->flags == DRAWFLAG_2XMODULATE)
 449                         GL_BlendFunc(GL_DST_COLOR,GL_SRC_COLOR);
 450                 else
 451                         GL_BlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 452
 453                 GL_DepthMask(true);
 454                 GL_DepthTest(false);
 455
 456                 c[0] = (float) ((color >> 24) & 0xFF) * (1.0f / 255.0f);
 457                 c[1] = (float) ((color >> 16) & 0xFF) * (1.0f / 255.0f);
 458                 c[2] = (float) ((color >>  8) & 0xFF) * (1.0f / 255.0f);
 459                 c[3] = (float) ( color        & 0xFF) * (1.0f / 255.0f);
 460                 x = dq->x;
 461                 y = dq->y;
 462                 w = dq->scalex;
 463                 h = dq->scaley;
 464
 465                 switch(dq->command)
 466                 {
 467                 case DRAWQUEUE_STRING:
 468                         GL_Color(c[0], c[1], c[2], c[3]);
 469                         str = (char *)(dq + 1);
 470                         if (strcmp("gfx/conchars", currentpic))
 471                         {
 472                                 currentpic = "gfx/conchars";
 473                                 m.tex[0] = chartexnum;
 474                         }
 475                         batchcount = 0;
 476                         m.pointer_vertex = varray_vertex3f;
 477                         m.pointer_texcoord[0] = varray_texcoord2f[0];
 478                         R_Mesh_State(&m);
 479                         at = varray_texcoord2f[0];
 480                         av = varray_vertex3f;
 481                         while ((num = *str++) && x < vid.conwidth)
 482                         {
 483                                 if (num != ' ')
 484                                 {
 485                                         s = (num & 15)*0.0625f + (0.5f / 256.0f);
 486                                         t = (num >> 4)*0.0625f + (0.5f / 256.0f);
 487                                         u = 0.0625f - (1.0f / 256.0f);
 488                                         v = 0.0625f - (1.0f / 256.0f);
 489                                         at[ 0] = s  ;at[ 1] = t  ;
 490                                         at[ 2] = s+u;at[ 3] = t  ;
 491                                         at[ 4] = s+u;at[ 5] = t+v;
 492                                         at[ 6] = s  ;at[ 7] = t+v;
 493                                         av[ 0] = x  ;av[ 1] = y  ;av[ 2] = 10;
 494                                         av[ 3] = x+w;av[ 4] = y  ;av[ 5] = 10;
 495                                         av[ 6] = x+w;av[ 7] = y+h;av[ 8] = 10;
 496                                         av[ 9] = x  ;av[10] = y+h;av[11] = 10;
 497                                         at += 8;
 498                                         av += 12;
 499                                         batchcount++;
 500                                         if (batchcount >= 128)
 501                                         {
 502                                                 R_Mesh_Draw(batchcount * 4, batchcount * 2, quadelements);
 503                                                 batchcount = 0;
 504                                                 at = varray_texcoord2f[0];
 505                                                 av = varray_vertex3f;
 506                                         }
 507                                 }
 508                                 x += w;
 509                         }
 510                         if (batchcount > 0)
 511                                 R_Mesh_Draw(batchcount * 4, batchcount * 2, quadelements);
 512                         break;
 513                 case DRAWQUEUE_MESH:
 514                         mesh = (void *)(dq + 1);
 515                         m.pointer_vertex = mesh->data_vertex3f;
 516                         GL_ColorPointer(mesh->data_color4f);
 517                         m.tex[0] = R_GetTexture(mesh->texture);
 518                         m.pointer_texcoord[0] = mesh->data_texcoord2f;
 519                         R_Mesh_State(&m);
 520                         R_Mesh_Draw(mesh->num_vertices, mesh->num_triangles, mesh->data_element3i);
 521                         GL_ColorPointer(NULL);
 522                         currentpic = "\0";
 523                         break;
 524                 case DRAWQUEUE_SETCLIP:
 525                         {
 526                                 // We have to convert the con coords into real coords
 527                                 int x , y, width, height;
 528                                 x = dq->x * ((float)vid.realwidth / vid.conwidth);
 529                                 // OGL uses top to bottom
 530                                 y = dq->y * ((float) vid.realheight / vid.conheight);
 531                                 width = dq->scalex * ((float)vid.realwidth / vid.conwidth);
 532                                 height = dq->scaley * ((float)vid.realheight / vid.conheight);
 533
 534                                 GL_Scissor(x, y, width, height);
 535
 536                                 GL_ScissorTest(true);
 537                         }
 538                         break;
 539                 case DRAWQUEUE_RESETCLIP:
 540                         GL_ScissorTest(false);
 541                         break;
 542                 }
 543         }
 544
 545         if (!vid_usinghwgamma)
 546         {
 547                 // all the blends ignore depth
 548                 memset(&m, 0, sizeof(m));
 549                 m.pointer_vertex = blendvertex3f;
 550                 R_Mesh_State(&m);
 551                 GL_DepthMask(true);
 552                 GL_DepthTest(false);
 553                 if (v_color_enable.integer)
 554                 {
 555                         c[0] = v_color_white_r.value;
 556                         c[1] = v_color_white_g.value;
 557                         c[2] = v_color_white_b.value;
 558                 }
 559                 else
 560                         c[0] = c[1] = c[2] = v_contrast.value;
 561                 if (c[0] >= 1.01f || c[1] >= 1.01f || c[2] >= 1.01f)
 562                 {
 563                         GL_BlendFunc(GL_DST_COLOR, GL_ONE);
 564                         while (c[0] >= 1.01f || c[1] >= 1.01f || c[2] >= 1.01f)
 565                         {
 566                                 GL_Color(bound(0, c[0] - 1, 1), bound(0, c[1] - 1, 1), bound(0, c[2] - 1, 1), 1);
 567                                 R_Mesh_Draw(3, 1, polygonelements);
 568                                 VectorScale(c, 0.5, c);
 569                         }
 570                 }
 571                 if (v_color_enable.integer)
 572                 {
 573                         c[0] = v_color_black_r.value;
 574                         c[1] = v_color_black_g.value;
 575                         c[2] = v_color_black_b.value;
 576                 }
 577                 else
 578                         c[0] = c[1] = c[2] = v_brightness.value;
 579                 if (c[0] >= 0.01f || c[1] >= 0.01f || c[2] >= 0.01f)
 580                 {
 581                         GL_BlendFunc(GL_ONE, GL_ONE);
 582                         GL_Color(c[0], c[1], c[2], 1);
 583                         R_Mesh_Draw(3, 1, polygonelements);
 584                 }
 585         }
 586 }
 587