GL_Color no longer interacts with GL_ColorPointer (so be sure to set GL_ColorPointer...
[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, *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         m.tex[0] = 0;
430         R_Mesh_State_Texture(&m);
431
432         currentpic = "";
433         pic = NULL;
434         texnum = 0;
435         color = 0;
436         GL_ColorPointer(NULL);
437         GL_Color(1,1,1,1);
438
439         batch = false;
440         batchcount = 0;
441         for (pos = 0;pos < r_refdef.drawqueuesize;pos += ((drawqueue_t *)(r_refdef.drawqueue + pos))->size)
442         {
443                 dq = (drawqueue_t *)(r_refdef.drawqueue + pos);
444                 color = dq->color;
445                 
446                 if(dq->flags == DRAWFLAG_ADDITIVE)
447                         GL_BlendFunc(GL_SRC_ALPHA, GL_ONE);
448                 else if(dq->flags == DRAWFLAG_MODULATE)
449                         GL_BlendFunc(GL_DST_COLOR, GL_ZERO);
450                 else if(dq->flags == DRAWFLAG_2XMODULATE)
451                         GL_BlendFunc(GL_DST_COLOR,GL_SRC_COLOR);
452                 else
453                         GL_BlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
454
455                 GL_DepthMask(true);
456                 GL_DepthTest(false);
457
458                 c[0] = (float) ((color >> 24) & 0xFF) * (1.0f / 255.0f);
459                 c[1] = (float) ((color >> 16) & 0xFF) * (1.0f / 255.0f);
460                 c[2] = (float) ((color >>  8) & 0xFF) * (1.0f / 255.0f);
461                 c[3] = (float) ( color        & 0xFF) * (1.0f / 255.0f);
462                 x = dq->x;
463                 y = dq->y;
464                 w = dq->scalex;
465                 h = dq->scaley;
466
467                 switch(dq->command)
468                 {
469                 case DRAWQUEUE_STRING:
470                         GL_Color(c[0], c[1], c[2], c[3]);
471                         str = (char *)(dq + 1);
472                         if (strcmp("gfx/conchars", currentpic))
473                         {
474                                 currentpic = "gfx/conchars";
475                                 m.tex[0] = chartexnum;
476                         }
477                         batchcount = 0;
478                         GL_VertexPointer(varray_vertex3f);
479                         m.pointer_texcoord[0] = varray_texcoord2f[0];
480                         R_Mesh_State_Texture(&m);
481                         at = varray_texcoord2f[0];
482                         av = varray_vertex3f;
483                         while ((num = *str++) && x < vid.conwidth)
484                         {
485                                 if (num != ' ')
486                                 {
487                                         s = (num & 15)*0.0625f + (0.5f / 256.0f);
488                                         t = (num >> 4)*0.0625f + (0.5f / 256.0f);
489                                         u = 0.0625f - (1.0f / 256.0f);
490                                         v = 0.0625f - (1.0f / 256.0f);
491                                         at[ 0] = s  ;at[ 1] = t  ;
492                                         at[ 2] = s+u;at[ 3] = t  ;
493                                         at[ 4] = s+u;at[ 5] = t+v;
494                                         at[ 6] = s  ;at[ 7] = t+v;
495                                         av[ 0] = x  ;av[ 1] = y  ;av[ 2] = 10;
496                                         av[ 3] = x+w;av[ 4] = y  ;av[ 5] = 10;
497                                         av[ 6] = x+w;av[ 7] = y+h;av[ 8] = 10;
498                                         av[ 9] = x  ;av[10] = y+h;av[11] = 10;
499                                         at += 8;
500                                         av += 12;
501                                         batchcount++;
502                                         if (batchcount >= 128)
503                                         {
504                                                 R_Mesh_Draw(batchcount * 4, batchcount * 2, quadelements);
505                                                 batchcount = 0;
506                                                 at = varray_texcoord2f[0];
507                                                 av = varray_vertex3f;
508                                         }
509                                 }
510                                 x += w;
511                         }
512                         if (batchcount > 0)
513                                 R_Mesh_Draw(batchcount * 4, batchcount * 2, quadelements);
514                         break;
515                 case DRAWQUEUE_MESH:
516                         mesh = (void *)(dq + 1);
517                         GL_VertexPointer(mesh->data_vertex3f);
518                         GL_ColorPointer(mesh->data_color4f);
519                         m.tex[0] = R_GetTexture(mesh->texture);
520                         m.pointer_texcoord[0] = mesh->data_texcoord2f;
521                         R_Mesh_State_Texture(&m);
522                         R_Mesh_Draw(mesh->num_vertices, mesh->num_triangles, mesh->data_element3i);
523                         GL_ColorPointer(NULL);
524                         currentpic = "\0";
525                         break;
526                 case DRAWQUEUE_SETCLIP:
527                         {
528                                 // We have to convert the con coords into real coords
529                                 int x , y, width, height;
530                                 x = dq->x * ((float)vid.realwidth / vid.conwidth);
531                                 // OGL uses top to bottom 
532                                 y = dq->y * ((float) vid.realheight / vid.conheight);
533                                 width = dq->scalex * ((float)vid.realwidth / vid.conwidth);
534                                 height = dq->scaley * ((float)vid.realheight / vid.conheight);
535
536                                 GL_Scissor(x, y, width, height);
537
538                                 GL_ScissorTest(true);
539                         }
540                         break;
541                 case DRAWQUEUE_RESETCLIP:
542                         GL_ScissorTest(false);
543                         break;                          
544                 }
545         }
546
547         if (!vid_usinghwgamma)
548         {
549                 // all the blends ignore depth
550                 memset(&m, 0, sizeof(m));
551                 R_Mesh_State_Texture(&m);
552                 GL_DepthMask(true);
553                 GL_DepthTest(false);
554                 if (v_color_enable.integer)
555                 {
556                         c[0] = v_color_white_r.value;
557                         c[1] = v_color_white_g.value;
558                         c[2] = v_color_white_b.value;
559                 }
560                 else
561                         c[0] = c[1] = c[2] = v_contrast.value;
562                 if (c[0] >= 1.01f || c[1] >= 1.01f || c[2] >= 1.01f)
563                 {
564                         GL_BlendFunc(GL_DST_COLOR, GL_ONE);
565                         GL_VertexPointer(blendvertex3f);
566                         while (c[0] >= 1.01f || c[1] >= 1.01f || c[2] >= 1.01f)
567                         {
568                                 GL_Color(bound(0, c[0] - 1, 1), bound(0, c[1] - 1, 1), bound(0, c[2] - 1, 1), 1);
569                                 R_Mesh_Draw(3, 1, polygonelements);
570                                 VectorScale(c, 0.5, c);
571                         }
572                 }
573                 if (v_color_enable.integer)
574                 {
575                         c[0] = v_color_black_r.value;
576                         c[1] = v_color_black_g.value;
577                         c[2] = v_color_black_b.value;
578                 }
579                 else
580                         c[0] = c[1] = c[2] = v_brightness.value;
581                 if (c[0] >= 0.01f || c[1] >= 0.01f || c[2] >= 0.01f)
582                 {
583                         GL_BlendFunc(GL_ONE, GL_ONE);
584                         GL_VertexPointer(blendvertex3f);
585                         GL_Color(c[0], c[1], c[2], 1);
586                         R_Mesh_Draw(3, 1, polygonelements);
587                 }
588         }
589 }
590