fixed gl_paranoid warnings in R_DrawQueue
[divverent/darkplaces.git] / 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;
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         pic = NULL;
431         texnum = 0;
432         color = 0;
433         GL_Color(1,1,1,1);
434
435         batch = false;
436         batchcount = 0;
437         for (pos = 0;pos < r_refdef.drawqueuesize;pos += ((drawqueue_t *)(r_refdef.drawqueue + pos))->size)
438         {
439                 dq = (drawqueue_t *)(r_refdef.drawqueue + pos);
440                 color = dq->color;
441                 
442                 if(dq->flags == DRAWFLAG_ADDITIVE)
443                         GL_BlendFunc(GL_SRC_ALPHA, GL_ONE);
444                 else if(dq->flags == DRAWFLAG_MODULATE)
445                         GL_BlendFunc(GL_DST_COLOR, GL_ZERO);
446                 else if(dq->flags == DRAWFLAG_2XMODULATE)
447                         GL_BlendFunc(GL_DST_COLOR,GL_SRC_COLOR);
448                 else
449                         GL_BlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
450
451                 GL_DepthMask(true);
452                 GL_DepthTest(false);
453
454                 c[0] = (float) ((color >> 24) & 0xFF) * (1.0f / 255.0f);
455                 c[1] = (float) ((color >> 16) & 0xFF) * (1.0f / 255.0f);
456                 c[2] = (float) ((color >>  8) & 0xFF) * (1.0f / 255.0f);
457                 c[3] = (float) ( color        & 0xFF) * (1.0f / 255.0f);
458                 x = dq->x;
459                 y = dq->y;
460                 w = dq->scalex;
461                 h = dq->scaley;
462
463                 switch(dq->command)
464                 {
465                 case DRAWQUEUE_STRING:
466                         GL_Color(c[0], c[1], c[2], c[3]);
467                         str = (char *)(dq + 1);
468                         batchcount = 0;
469                         m.pointer_vertex = varray_vertex3f;
470                         m.pointer_color = NULL;
471                         m.pointer_texcoord[0] = varray_texcoord2f[0];
472                         m.tex[0] = chartexnum;
473                         R_Mesh_State(&m);
474                         at = varray_texcoord2f[0];
475                         av = varray_vertex3f;
476                         while ((num = *str++) && x < vid.conwidth)
477                         {
478                                 if (num != ' ')
479                                 {
480                                         s = (num & 15)*0.0625f + (0.5f / 256.0f);
481                                         t = (num >> 4)*0.0625f + (0.5f / 256.0f);
482                                         u = 0.0625f - (1.0f / 256.0f);
483                                         v = 0.0625f - (1.0f / 256.0f);
484                                         at[ 0] = s  ;at[ 1] = t  ;
485                                         at[ 2] = s+u;at[ 3] = t  ;
486                                         at[ 4] = s+u;at[ 5] = t+v;
487                                         at[ 6] = s  ;at[ 7] = t+v;
488                                         av[ 0] = x  ;av[ 1] = y  ;av[ 2] = 10;
489                                         av[ 3] = x+w;av[ 4] = y  ;av[ 5] = 10;
490                                         av[ 6] = x+w;av[ 7] = y+h;av[ 8] = 10;
491                                         av[ 9] = x  ;av[10] = y+h;av[11] = 10;
492                                         at += 8;
493                                         av += 12;
494                                         batchcount++;
495                                         if (batchcount >= 128)
496                                         {
497                                                 GL_LockArrays(0, batchcount * 4);
498                                                 R_Mesh_Draw(batchcount * 4, batchcount * 2, quadelements);
499                                                 GL_LockArrays(0, 0);
500                                                 batchcount = 0;
501                                                 at = varray_texcoord2f[0];
502                                                 av = varray_vertex3f;
503                                         }
504                                 }
505                                 x += w;
506                         }
507                         if (batchcount > 0)
508                         {
509                                 GL_LockArrays(0, batchcount * 4);
510                                 R_Mesh_Draw(batchcount * 4, batchcount * 2, quadelements);
511                                 GL_LockArrays(0, 0);
512                         }
513                         break;
514                 case DRAWQUEUE_MESH:
515                         mesh = (void *)(dq + 1);
516                         m.pointer_vertex = mesh->data_vertex3f;
517                         m.pointer_color = mesh->data_color4f;
518                         m.pointer_texcoord[0] = mesh->data_texcoord2f;
519                         m.tex[0] = R_GetTexture(mesh->texture);
520                         if (!m.tex[0])
521                                 m.pointer_texcoord[0] = NULL;
522                         R_Mesh_State(&m);
523                         GL_LockArrays(0, mesh->num_vertices);
524                         R_Mesh_Draw(mesh->num_vertices, mesh->num_triangles, mesh->data_element3i);
525                         GL_LockArrays(0, 0);
526                         break;
527                 case DRAWQUEUE_SETCLIP:
528                         {
529                                 // We have to convert the con coords into real coords
530                                 int x , y, width, height;
531                                 x = dq->x * ((float)vid.realwidth / vid.conwidth);
532                                 // OGL uses top to bottom 
533                                 y = dq->y * ((float) vid.realheight / vid.conheight);
534                                 width = dq->scalex * ((float)vid.realwidth / vid.conwidth);
535                                 height = dq->scaley * ((float)vid.realheight / vid.conheight);
536
537                                 GL_Scissor(x, y, width, height);
538
539                                 GL_ScissorTest(true);
540                         }
541                         break;
542                 case DRAWQUEUE_RESETCLIP:
543                         GL_ScissorTest(false);
544                         break;                          
545                 }
546         }
547
548         if (!vid_usinghwgamma)
549         {
550                 // all the blends ignore depth
551                 memset(&m, 0, sizeof(m));
552                 m.pointer_vertex = blendvertex3f;
553                 R_Mesh_State(&m);
554                 GL_DepthMask(true);
555                 GL_DepthTest(false);
556                 if (v_color_enable.integer)
557                 {
558                         c[0] = v_color_white_r.value;
559                         c[1] = v_color_white_g.value;
560                         c[2] = v_color_white_b.value;
561                 }
562                 else
563                         c[0] = c[1] = c[2] = v_contrast.value;
564                 if (c[0] >= 1.01f || c[1] >= 1.01f || c[2] >= 1.01f)
565                 {
566                         GL_BlendFunc(GL_DST_COLOR, GL_ONE);
567                         while (c[0] >= 1.01f || c[1] >= 1.01f || c[2] >= 1.01f)
568                         {
569                                 GL_Color(bound(0, c[0] - 1, 1), bound(0, c[1] - 1, 1), bound(0, c[2] - 1, 1), 1);
570                                 R_Mesh_Draw(3, 1, polygonelements);
571                                 VectorScale(c, 0.5, c);
572                         }
573                 }
574                 if (v_color_enable.integer)
575                 {
576                         c[0] = v_color_black_r.value;
577                         c[1] = v_color_black_g.value;
578                         c[2] = v_color_black_b.value;
579                 }
580                 else
581                         c[0] = c[1] = c[2] = v_brightness.value;
582                 if (c[0] >= 0.01f || c[1] >= 0.01f || c[2] >= 0.01f)
583                 {
584                         GL_BlendFunc(GL_ONE, GL_ONE);
585                         GL_Color(c[0], c[1], c[2], 1);
586                         R_Mesh_Draw(3, 1, polygonelements);
587                 }
588         }
589 }
590