opengl hardware super-transparency support using GL_NV_register_combiners (d1x r1...
[btb/d2x.git] / arch / ogl / gr.c
1 /* $Id: gr.c,v 1.29 2004-05-22 21:48:33 btb Exp $ */
2 /*
3  *
4  * OGL video functions. - Added 9/15/99 Matthew Mueller
5  *
6  *
7  */
8
9 #ifdef HAVE_CONFIG_H
10 #include <conf.h>
11 #endif
12
13 #include <stdlib.h>
14 #include <stdio.h>
15 #include <string.h>
16 #ifdef _MSC_VER
17 #include <windows.h>
18 #endif
19
20 #if defined(__APPLE__) && defined(__MACH__)
21 //#include <OpenGL/gl.h>
22 #else
23 //#include <GL/gl.h>
24 #endif
25 #ifndef _MSC_VER
26 #include <unistd.h>
27 #endif
28 #include <sys/types.h>
29 #include <sys/stat.h>
30 #include <fcntl.h>
31 #include <errno.h>
32
33 #include "hudmsg.h"
34 #include "game.h"
35 #include "text.h"
36 #include "gr.h"
37 #include "gamefont.h"
38 #include "grdef.h"
39 #include "palette.h"
40 #include "u_mem.h"
41 #include "error.h"
42
43 #include "inferno.h"
44 #include "screens.h"
45
46 #include "strutil.h"
47 #include "mono.h"
48 #include "args.h"
49 #include "key.h"
50
51 #define DECLARE_VARS
52 #include "internal.h"
53 #if defined(__APPLE__) && defined(__MACH__)
54 #include <OpenGL/glu.h>
55 #undef GL_ARB_multitexture // hack!
56 #else
57 #include <GL/glu.h>
58 #endif
59
60 int ogl_voodoohack=0;
61
62 int gr_installed = 0;
63
64
65 void gr_palette_clear(); // Function prototype for gr_init;
66 int gl_initialized=0;
67 int gl_reticle = 0;
68
69 int ogl_fullscreen=0;
70
71 int gr_check_fullscreen(void){
72         return ogl_fullscreen;
73 }
74
75 void gr_do_fullscreen(int f){
76         if (ogl_voodoohack)
77                 ogl_fullscreen=1;//force fullscreen mode on voodoos.
78         else
79                 ogl_fullscreen=f;
80         if (gl_initialized){
81                 ogl_do_fullscreen_internal();
82         }
83 }
84
85 int gr_toggle_fullscreen(void){
86         gr_do_fullscreen(!ogl_fullscreen);
87         //      grd_curscreen->sc_mode=0;//hack to get it to reset screen mode
88         return ogl_fullscreen;
89 }
90
91 int arch_toggle_fullscreen_menu(void){
92         unsigned char *buf=NULL;
93
94         if (ogl_readpixels_ok){
95                 MALLOC(buf,unsigned char,grd_curscreen->sc_w*grd_curscreen->sc_h*3);
96                 glReadBuffer(GL_FRONT);
97                 glReadPixels(0,0,grd_curscreen->sc_w,grd_curscreen->sc_h,GL_RGB,GL_UNSIGNED_BYTE,buf);
98         }
99
100         gr_do_fullscreen(!ogl_fullscreen);
101
102         if (ogl_readpixels_ok){
103 //              glWritePixels(0,0,grd_curscreen->sc_w,grd_curscreen->sc_h,GL_RGB,GL_UNSIGNED_BYTE,buf);
104                 glRasterPos2f(0,0);
105                 glDrawPixels(grd_curscreen->sc_w,grd_curscreen->sc_h,GL_RGB,GL_UNSIGNED_BYTE,buf);
106                 free(buf);
107         }
108         //      grd_curscreen->sc_mode=0;//hack to get it to reset screen mode
109
110         return ogl_fullscreen;
111 }
112
113 void ogl_init_state(void){
114         /* select clearing (background) color   */
115         glClearColor(0.0, 0.0, 0.0, 0.0);
116         glShadeModel(GL_SMOOTH);
117
118         /* initialize viewing values */
119         glMatrixMode(GL_PROJECTION);
120         glLoadIdentity();
121         glOrtho(0.0, 1.0, 0.0, 1.0, -1.0, 1.0);
122         glScalef(1.0, -1.0, 1.0);
123         glTranslatef(0.0, -1.0, 0.0);
124         gr_palette_step_up(0,0,0);//in case its left over from in game
125 }
126
127 int last_screen_mode=-1;
128
129 void ogl_set_screen_mode(void){
130         if (last_screen_mode==Screen_mode)
131                 return;
132         OGL_VIEWPORT(0,0,grd_curscreen->sc_w,grd_curscreen->sc_h);
133 //      OGL_VIEWPORT(grd_curcanv->cv_bitmap.bm_x,grd_curcanv->cv_bitmap.bm_y,grd_curcanv->cv_bitmap.bm_w,grd_curcanv->cv_bitmap.bm_h);
134         if (Screen_mode==SCREEN_GAME){
135                 glDrawBuffer(GL_BACK);
136         }else{
137                 glClearColor(0.0, 0.0, 0.0, 0.0);
138                 glDrawBuffer(GL_FRONT);
139                 glClear(GL_COLOR_BUFFER_BIT);
140                 glMatrixMode(GL_PROJECTION);
141                 glLoadIdentity();//clear matrix
142                 glOrtho(0.0, 1.0, 0.0, 1.0, -1.0, 1.0);
143                 glMatrixMode(GL_MODELVIEW);
144                 glLoadIdentity();//clear matrix
145                 glEnable(GL_BLEND);
146                 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
147         }
148         last_screen_mode=Screen_mode;
149 }
150
151 void gr_update()
152 {
153         if (gl_initialized){
154
155                 if(Screen_mode != SCREEN_GAME){
156                         glFlush();
157                 }
158         }
159 }
160
161 const char *gl_vendor,*gl_renderer,*gl_version,*gl_extensions;
162
163 void ogl_get_verinfo(void)
164 {
165         int t, arb_max_textures = -1, sgi_max_textures = -1, nv_register_combiners = -1;
166         float anisotropic_max = 0;
167
168         gl_vendor=glGetString(GL_VENDOR);
169         gl_renderer=glGetString(GL_RENDERER);
170         gl_version=glGetString(GL_VERSION);
171         gl_extensions=glGetString(GL_EXTENSIONS);
172
173         con_printf(CON_VERBOSE, "gl vendor:%s renderer:%s version:%s extensions:%s\n",gl_vendor,gl_renderer,gl_version,gl_extensions);
174
175         ogl_intensity4_ok = 1;
176         ogl_luminance4_alpha4_ok = 1;
177         ogl_rgba2_ok = 1;
178         ogl_gettexlevelparam_ok = 1;
179         ogl_setgammaramp_ok = 1;
180
181 #ifdef WGL_VIDEO
182         dglMultiTexCoord2fARB = (glMultiTexCoord2fARB_fp)wglGetProcAddress("glMultiTexCoord2fARB");
183         dglActiveTextureARB = (glActiveTextureARB_fp)wglGetProcAddress("glActiveTextureARB");
184         dglMultiTexCoord2fSGIS = (glMultiTexCoord2fSGIS_fp)wglGetProcAddress("glMultiTexCoord2fSGIS");
185         dglSelectTextureSGIS = (glSelectTextureSGIS_fp)wglGetProcAddress("glSelectTextureSGIS");
186         dglColorTableEXT = (glColorTableEXT_fp)wglGetProcAddress("glColorTableEXT");
187         dglCombinerParameteriNV = (glCombinerParameteriNV_fp)wglGetProcAddress("glCombinerParameteriNV");
188         dglCombinerInputNV = (glCombinerInputNV_fp)wglGetProcAddress("glCombinerInputNV");
189         dglCombinerOutputNV = (glCombinerOutputNV_fp)wglGetProcAddress("glCombinerOutputNV");
190 #endif
191
192 #ifdef GL_ARB_multitexture
193         ogl_arb_multitexture_ok = (strstr(gl_extensions, "GL_ARB_multitexture") != 0 && glActiveTextureARB != 0);
194         mprintf((0,"c:%p d:%p e:%p\n",strstr(gl_extensions,"GL_ARB_multitexture"),glActiveTextureARB,glBegin));
195 #endif
196 #ifdef GL_SGIS_multitexture
197         ogl_sgis_multitexture_ok = (strstr(gl_extensions, "GL_SGIS_multitexture") != 0 && glSelectTextureSGIS != 0);
198         mprintf((0,"a:%p b:%p\n",strstr(gl_extensions,"GL_SGIS_multitexture"),glSelectTextureSGIS));
199 #endif
200         ogl_nv_texture_env_combine4_ok = (strstr(gl_extensions, "GL_NV_texture_env_combine4") != 0);
201 #ifdef GL_NV_register_combiners
202         ogl_nv_register_combiners_ok=(strstr(gl_extensions,"GL_NV_register_combiners")!=0 && glCombinerOutputNV!=0);
203 #endif
204
205         ogl_ext_texture_filter_anisotropic_ok = (strstr(gl_extensions, "GL_EXT_texture_filter_anisotropic") != 0);
206         if (ogl_ext_texture_filter_anisotropic_ok)
207                 glGetFloatv(GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT, &anisotropic_max);
208
209 #ifdef GL_EXT_paletted_texture
210         ogl_paletted_texture_ok = (strstr(gl_extensions, "GL_EXT_paletted_texture") != 0 && glColorTableEXT != 0);
211         ogl_shared_palette_ok = (strstr(gl_extensions, "GL_EXT_shared_texture_palette") != 0 && ogl_paletted_texture_ok);
212 #endif
213         //add driver specific hacks here.  whee.
214         if ((stricmp(gl_renderer,"Mesa NVIDIA RIVA 1.0\n")==0 || stricmp(gl_renderer,"Mesa NVIDIA RIVA 1.2\n")==0) && stricmp(gl_version,"1.2 Mesa 3.0")==0){
215                 ogl_intensity4_ok=0;//ignores alpha, always black background instead of transparent.
216                 ogl_readpixels_ok=0;//either just returns all black, or kills the X server entirely
217                 ogl_gettexlevelparam_ok=0;//returns random data..
218         }
219         if (stricmp(gl_vendor,"Matrox Graphics Inc.")==0){
220                 //displays garbage. reported by
221                 //  redomen@crcwnet.com (render="Matrox G400" version="1.1.3 5.52.015")
222                 //  orulz (Matrox G200)
223                 ogl_intensity4_ok=0;
224         }
225
226         //allow overriding of stuff.
227 #ifdef GL_ARB_multitexture
228         if ((t=FindArg("-gl_arb_multitexture_ok"))){
229                 ogl_arb_multitexture_ok=atoi(Args[t+1]);
230         }
231         if (ogl_arb_multitexture_ok)
232                 glGetIntegerv(GL_MAX_TEXTURE_UNITS_ARB, &arb_max_textures);
233 #endif
234 #ifdef GL_SGIS_multitexture
235         if ((t=FindArg("-gl_sgis_multitexture_ok"))){
236                 ogl_sgis_multitexture_ok=atoi(Args[t+1]);
237         }
238         if (ogl_sgis_multitexture_ok)
239                 glGetIntegerv(GL_MAX_TEXTURES_SGIS, &sgi_max_textures);
240 #endif
241 #ifdef GL_NV_register_combiners
242         if ((t = FindArg("-gl_nv_register_combiners_ok")))
243         {
244                 ogl_nv_register_combiners_ok=atoi(Args[t + 1]);
245         }
246         if (ogl_nv_register_combiners_ok)
247                 glGetIntegerv(GL_MAX_GENERAL_COMBINERS_NV, &nv_register_combiners);
248 #endif
249 #ifdef GL_EXT_paletted_texture
250         if ((t = FindArg("-gl_paletted_texture_ok")))
251         {
252                 ogl_paletted_texture_ok = atoi(Args[t + 1]);
253         }
254         if ((t = FindArg("-gl_shared_palette_ok")))
255         {
256                 ogl_shared_palette_ok = atoi(Args[t + 1]);
257         }
258         ogl_shared_palette_ok = ogl_shared_palette_ok && ogl_paletted_texture_ok; // shared palettes require palette support in the first place, obviously ;)
259         printf("gl_paletted_texture: %i  gl_shared_palette: %i  (using paletted textures: %i)\n", ogl_paletted_texture_ok, ogl_shared_palette_ok, ogl_shared_palette_ok);
260 #endif
261         if ((t=FindArg("-gl_intensity4_ok"))){
262                 ogl_intensity4_ok=atoi(Args[t+1]);
263         }
264         if ((t=FindArg("-gl_luminance4_alpha4_ok"))){
265                 ogl_luminance4_alpha4_ok=atoi(Args[t+1]);
266         }
267         if ((t=FindArg("-gl_rgba2_ok"))){
268                 ogl_rgba2_ok=atoi(Args[t+1]);
269         }
270         if ((t=FindArg("-gl_readpixels_ok"))){
271                 ogl_readpixels_ok=atoi(Args[t+1]);
272         }
273         if ((t=FindArg("-gl_gettexlevelparam_ok"))){
274                 ogl_gettexlevelparam_ok=atoi(Args[t+1]);
275         }
276         if ((t=FindArg("-gl_setgammaramp_ok")))
277         {
278                 ogl_setgammaramp_ok = atoi(Args[t + 1]);
279         }
280
281         con_printf(CON_VERBOSE, "gl_arb_multitexture:%i(%i units) gl_sgis_multitexture:%i(%i units) gl_nv_texture_env_combine4:%i gl_nv_register_combiners:%i(%i stages)\n", ogl_arb_multitexture_ok, arb_max_textures, ogl_sgis_multitexture_ok, sgi_max_textures, ogl_nv_texture_env_combine4_ok, 0/*ogl_nv_register_combiners_ok*/, nv_register_combiners);
282         con_printf(CON_VERBOSE, "gl_intensity4:%i gl_luminance4_alpha4:%i gl_rgba2:%i gl_readpixels:%i gl_gettexlevelparam:%i gl_setgammaramp_ok:%i gl_ext_texture_filter_anisotropic:%i(%f max)\n", ogl_intensity4_ok, ogl_luminance4_alpha4_ok, ogl_rgba2_ok, ogl_readpixels_ok, ogl_gettexlevelparam_ok, ogl_setgammaramp_ok, ogl_ext_texture_filter_anisotropic_ok, anisotropic_max);
283 }
284
285
286 int gr_check_mode(u_int32_t mode)
287 {
288         int w, h;
289
290         w = SM_W(mode);
291         h = SM_H(mode);
292         return ogl_check_mode(w, h); // platform specific code
293 }
294
295
296 extern int VGA_current_mode; // DPH: kludge - remove at all costs
297
298 int gr_set_mode(u_int32_t mode)
299 {
300         unsigned int w,h;
301         char *gr_bm_data;
302
303 #ifdef NOGRAPH
304 return 0;
305 #endif
306 //      mode=0;
307         if (mode<=0)
308                 return 0;
309
310         w=SM_W(mode);
311         h=SM_H(mode);
312         VGA_current_mode = mode;
313
314         //if (screen != NULL) gr_palette_clear();
315
316 //      ogl_init_state();
317         
318         gr_bm_data=grd_curscreen->sc_canvas.cv_bitmap.bm_data;//since we use realloc, we want to keep this pointer around.
319         memset( grd_curscreen, 0, sizeof(grs_screen));
320         grd_curscreen->sc_mode = mode;
321         grd_curscreen->sc_w = w;
322         grd_curscreen->sc_h = h;
323         grd_curscreen->sc_aspect = fixdiv(grd_curscreen->sc_w*3,grd_curscreen->sc_h*4);
324         grd_curscreen->sc_canvas.cv_bitmap.bm_x = 0;
325         grd_curscreen->sc_canvas.cv_bitmap.bm_y = 0;
326         grd_curscreen->sc_canvas.cv_bitmap.bm_w = w;
327         grd_curscreen->sc_canvas.cv_bitmap.bm_h = h;
328         //grd_curscreen->sc_canvas.cv_bitmap.bm_rowsize = screen->pitch;
329         grd_curscreen->sc_canvas.cv_bitmap.bm_rowsize = w;
330         grd_curscreen->sc_canvas.cv_bitmap.bm_type = BM_OGL;
331         //grd_curscreen->sc_canvas.cv_bitmap.bm_data = (unsigned char *)screen->pixels;
332 //      mprintf((0,"ogl/gr.c: reallocing %p to %i\n",grd_curscreen->sc_canvas.cv_bitmap.bm_data,w*h));
333         grd_curscreen->sc_canvas.cv_bitmap.bm_data = d_realloc(gr_bm_data,w*h);
334         gr_set_current_canvas(NULL);
335         //gr_enable_default_palette_loading();
336         
337         ogl_init_window(w,h);//platform specific code
338
339         ogl_get_verinfo();
340
341         OGL_VIEWPORT(0,0,w,h);
342
343         ogl_set_screen_mode();
344
345 //      gamefont_choose_game_font(w,h);
346         
347         return 0;
348 }
349
350 #define GLstrcmptestr(a,b) if (stricmp(a,#b)==0 || stricmp(a,"GL_" #b)==0)return GL_ ## b;
351 int ogl_atotexfilti(char *a,int min){
352         GLstrcmptestr(a,NEAREST);
353         GLstrcmptestr(a,LINEAR);
354         if (min){//mipmaps are valid only for the min filter
355                 GLstrcmptestr(a,NEAREST_MIPMAP_NEAREST);
356                 GLstrcmptestr(a,NEAREST_MIPMAP_LINEAR);
357                 GLstrcmptestr(a,LINEAR_MIPMAP_NEAREST);
358                 GLstrcmptestr(a,LINEAR_MIPMAP_LINEAR);
359         }
360         Error("unknown/invalid texture filter %s\n",a);
361 //      return GL_NEAREST;
362 }
363 int ogl_testneedmipmaps(int i){
364         switch (i){
365                 case GL_NEAREST:
366                 case GL_LINEAR:
367                         return 0;
368                 case GL_NEAREST_MIPMAP_NEAREST:
369                 case GL_NEAREST_MIPMAP_LINEAR:
370                 case GL_LINEAR_MIPMAP_NEAREST:
371                 case GL_LINEAR_MIPMAP_LINEAR:
372                         return 1;
373         }
374         Error("unknown texture filter %x\n",i);
375 //      return -1;
376 }
377 #ifdef OGL_RUNTIME_LOAD
378 #ifdef _WIN32
379 char *OglLibPath="opengl32.dll";
380 #endif
381 #ifdef __unix__
382 char *OglLibPath="libGL.so";
383 #endif
384
385 int ogl_rt_loaded=0;
386 int ogl_init_load_library(void)
387 {
388         int retcode=0;
389         if (!ogl_rt_loaded){
390                 int t;
391                 if ((t=FindArg("-gl_library")))
392                         OglLibPath=Args[t+1];
393
394                 retcode = OpenGL_LoadLibrary(true);
395                 if(retcode)
396                 {
397                         mprintf((0,"Opengl loaded ok\n"));
398         
399                         if(!glEnd)
400                         {
401                                 Error("Opengl: Functions not imported\n");
402                         }
403                 }else{
404                         Error("Opengl: error loading %s\n",OglLibPath);
405                 }
406                 ogl_rt_loaded=1;
407         }
408         return retcode;
409 }
410 #endif
411
412 int gr_init()
413 {
414         int mode = SM(640,480);
415         int retcode, t, glt = 0;
416
417         // Only do this function once!
418         if (gr_installed==1)
419                 return -1;
420
421
422 #ifdef OGL_RUNTIME_LOAD
423         ogl_init_load_library();
424 #endif
425
426 #ifdef GR_SUPPORTS_FULLSCREEN_TOGGLE
427         if (FindArg("-gl_voodoo")){
428                 ogl_voodoohack=1;
429                 gr_toggle_fullscreen();
430         }
431         if (FindArg("-fullscreen"))
432                 gr_toggle_fullscreen();
433 #endif
434         if ((glt=FindArg("-gl_alttexmerge")))
435                 ogl_alttexmerge=1;
436         if ((t=FindArg("-gl_stdtexmerge")))
437                 if (t>=glt)//allow overriding of earlier args
438                         ogl_alttexmerge=0;
439
440         if ((glt = FindArg("-gl_16bittextures")))
441         {
442                 ogl_rgba_internalformat = GL_RGB5_A1;
443                 ogl_rgb_internalformat = GL_RGB5;
444         }
445
446         if ((glt=FindArg("-gl_mipmap"))){
447                 GL_texmagfilt=GL_LINEAR;
448                 GL_texminfilt=GL_LINEAR_MIPMAP_NEAREST;
449         }
450         if ((glt=FindArg("-gl_trilinear")))
451         {
452                 GL_texmagfilt = GL_LINEAR;
453                 GL_texminfilt = GL_LINEAR_MIPMAP_LINEAR;
454         }
455         if ((t=FindArg("-gl_simple"))){
456                 if (t>=glt){//allow overriding of earlier args
457                         glt=t;
458                         GL_texmagfilt=GL_NEAREST;
459                         GL_texminfilt=GL_NEAREST;
460                 }
461         }
462         if ((t=FindArg("-gl_texmagfilt")) || (t=FindArg("-gl_texmagfilter"))){
463                 if (t>=glt)//allow overriding of earlier args
464                         GL_texmagfilt=ogl_atotexfilti(Args[t+1],0);
465         }
466         if ((t=FindArg("-gl_texminfilt")) || (t=FindArg("-gl_texminfilter"))){
467                 if (t>=glt)//allow overriding of earlier args
468                         GL_texminfilt=ogl_atotexfilti(Args[t+1],1);
469         }
470         GL_needmipmaps=ogl_testneedmipmaps(GL_texminfilt);
471
472         if ((t = FindArg("-gl_anisotropy")) || (t = FindArg("-gl_anisotropic")))
473         {
474                 GL_texanisofilt=atof(Args[t + 1]);
475         }
476
477         mprintf((0,"gr_init: texmagfilt:%x texminfilt:%x needmipmaps=%i anisotropic:%f\n",GL_texmagfilt,GL_texminfilt,GL_needmipmaps,GL_texanisofilt));
478
479         
480         if ((t=FindArg("-gl_vidmem"))){
481                 ogl_mem_target=atoi(Args[t+1])*1024*1024;
482         }
483         if ((t=FindArg("-gl_reticle"))){
484                 gl_reticle=atoi(Args[t+1]);
485         }
486         //printf("ogl_mem_target=%i\n",ogl_mem_target);
487         
488         ogl_init();//platform specific initialization
489
490         ogl_init_texture_list_internal();
491                 
492         MALLOC( grd_curscreen,grs_screen,1 );
493         memset( grd_curscreen, 0, sizeof(grs_screen));
494         grd_curscreen->sc_canvas.cv_bitmap.bm_data = NULL;
495
496         // Set the mode.
497         if ((retcode=gr_set_mode(mode)))
498         {
499                 return retcode;
500         }
501
502         grd_curscreen->sc_canvas.cv_color = 0;
503         grd_curscreen->sc_canvas.cv_drawmode = 0;
504         grd_curscreen->sc_canvas.cv_font = NULL;
505         grd_curscreen->sc_canvas.cv_font_fg_color = 0;
506         grd_curscreen->sc_canvas.cv_font_bg_color = 0;
507         gr_set_current_canvas( &grd_curscreen->sc_canvas );
508
509         gr_installed = 1;
510         
511         atexit(gr_close);
512
513         return 0;
514 }
515
516 void gr_close()
517 {
518 //      mprintf((0,"ogl init: %s %s %s - %s\n",glGetString(GL_VENDOR),glGetString(GL_RENDERER),glGetString(GL_VERSION),glGetString,(GL_EXTENSIONS)));
519
520         ogl_close();//platform specific code
521         if (grd_curscreen){
522                 if (grd_curscreen->sc_canvas.cv_bitmap.bm_data)
523                         d_free(grd_curscreen->sc_canvas.cv_bitmap.bm_data);
524                 d_free(grd_curscreen);
525         }
526 #ifdef OGL_RUNTIME_LOAD
527         if (ogl_rt_loaded)
528                 OpenGL_LoadLibrary(false);
529 #endif
530 }
531 extern int r_upixelc;
532 void ogl_upixelc(int x, int y, int c){
533         r_upixelc++;
534 //      printf("gr_upixelc(%i,%i,%i)%i\n",x,y,c,Function_mode==FMODE_GAME);
535 //      if(Function_mode != FMODE_GAME){
536 //              grd_curcanv->cv_bitmap.bm_data[y*grd_curscreen->sc_canvas.cv_bitmap.bm_w+x]=c;
537 //      }else{
538                 OGL_DISABLE(TEXTURE_2D);
539                 glPointSize(1.0);
540                 glBegin(GL_POINTS);
541 //              glBegin(GL_LINES);
542 //      ogl_pal=gr_current_pal;
543                 glColor3f(CPAL2Tr(c),CPAL2Tg(c),CPAL2Tb(c));
544 //      ogl_pal=gr_palette;
545                 glVertex2f((x + grd_curcanv->cv_bitmap.bm_x + 0.5) / (float)last_width, 1.0 - (y + grd_curcanv->cv_bitmap.bm_y + 0.5) / (float)last_height);
546 //              glVertex2f(x/((float)last_width+1),1.0-y/((float)last_height+1));
547                 glEnd();
548 //      }
549 }
550 void ogl_urect(int left,int top,int right,int bot){
551         GLfloat xo,yo,xf,yf;
552         int c=COLOR;
553         
554         xo=(left+grd_curcanv->cv_bitmap.bm_x)/(float)last_width;
555         xf = (right + 1 + grd_curcanv->cv_bitmap.bm_x) / (float)last_width;
556         yo=1.0-(top+grd_curcanv->cv_bitmap.bm_y)/(float)last_height;
557         yf = 1.0 - (bot + 1 + grd_curcanv->cv_bitmap.bm_y) / (float)last_height;
558
559         OGL_DISABLE(TEXTURE_2D);
560         glColor3f(CPAL2Tr(c),CPAL2Tg(c),CPAL2Tb(c));
561         glBegin(GL_QUADS);
562         glVertex2f(xo,yo);
563         glVertex2f(xo,yf);
564         glVertex2f(xf,yf);
565         glVertex2f(xf,yo);
566         glEnd();
567 }
568 void ogl_ulinec(int left,int top,int right,int bot,int c){
569         GLfloat xo,yo,xf,yf;
570
571         xo = (left + grd_curcanv->cv_bitmap.bm_x + 0.5) / (float)last_width;
572         xf = (right + grd_curcanv->cv_bitmap.bm_x + 0.5) / (float)last_width;
573         yo = 1.0 - (top + grd_curcanv->cv_bitmap.bm_y + 0.5) / (float)last_height;
574         yf = 1.0 - (bot + grd_curcanv->cv_bitmap.bm_y + 0.5) / (float)last_height;
575
576         OGL_DISABLE(TEXTURE_2D);
577         glColor3f(CPAL2Tr(c),CPAL2Tg(c),CPAL2Tb(c));
578         glBegin(GL_LINES);
579         glVertex2f(xo,yo);
580         glVertex2f(xf,yf);
581         glEnd();
582 }
583         
584
585 GLfloat last_r=0, last_g=0, last_b=0;
586 int do_pal_step=0;
587 void ogl_do_palfx(void){
588 //      GLfloat r,g,b,a;
589         OGL_DISABLE(TEXTURE_2D);
590         if (gr_palette_faded_out){
591 /*              glEnable(GL_BLEND);
592                 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);*/
593                 glColor3f(0,0,0);
594 //              r=g=b=0.0;a=1.0;
595         }else{
596                 if (do_pal_step){
597                         //glBlendFunc(GL_SRC_COLOR, GL_DST_COLOR);
598                         glEnable(GL_BLEND);
599                         glBlendFunc(GL_ONE,GL_ONE);
600                         glColor3f(last_r,last_g,last_b);
601 //                      r=f2fl(last_r);g=f2fl(last_g);b=f2fl(last_b);a=0.5;
602                 }else
603                         return;
604         }
605         
606         
607         glBegin(GL_QUADS);
608         glVertex2f(0,0);
609         glVertex2f(0,1);
610         glVertex2f(1,1);
611         glVertex2f(1,0);
612         glEnd();
613         
614         glEnable(GL_BLEND);     
615         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
616 }
617
618 void gr_palette_clear()
619 {
620         gr_palette_faded_out=1;
621 }
622
623
624 int ogl_brightness_ok = 0;
625 int ogl_setgammaramp_ok = 1;
626 int ogl_brightness_r = 0, ogl_brightness_g = 0, ogl_brightness_b = 0;
627 static int old_b_r = 0, old_b_g = 0, old_b_b = 0;
628
629 void gr_palette_step_up(int r, int g, int b)
630 {
631         if (gr_palette_faded_out)
632                 return;
633
634         old_b_r = ogl_brightness_r;
635         old_b_g = ogl_brightness_g;
636         old_b_b = ogl_brightness_b;
637
638         ogl_brightness_r = max(r + gr_palette_gamma, 0);
639         ogl_brightness_g = max(g + gr_palette_gamma, 0);
640         ogl_brightness_b = max(b + gr_palette_gamma, 0);
641
642         if (ogl_setgammaramp_ok &&
643             (old_b_r != ogl_brightness_r ||
644              old_b_g != ogl_brightness_g ||
645              old_b_b != ogl_brightness_b))
646                 ogl_brightness_ok = !ogl_setbrightness_internal();
647
648         if (!ogl_setgammaramp_ok || !ogl_brightness_ok)
649         {
650                 last_r = ogl_brightness_r / 63.0;
651                 last_g = ogl_brightness_g / 63.0;
652                 last_b = ogl_brightness_b / 63.0;
653
654                 do_pal_step = (r || g || b || gr_palette_gamma);
655         }
656         else
657         {
658                 do_pal_step = 0;
659         }
660 }
661
662 //added on 980913 by adb to fix palette problems
663 // need a min without side effects...
664 #undef min
665 static inline int min(int x, int y) { return x < y ? x : y; }
666 //end changes by adb
667
668 void gr_palette_load( ubyte *pal )      
669 {
670  int i;//, j;
671
672  for (i=0; i<768; i++ ) {
673      gr_current_pal[i] = pal[i];
674      if (gr_current_pal[i] > 63) gr_current_pal[i] = 63;
675  }
676  //palette = screen->format->palette;
677
678  gr_palette_faded_out=0;
679
680         gr_palette_step_up(0, 0, 0); // make ogl_setbrightness_internal get run so that menus get brightened too.
681
682  init_computed_colors();
683
684         ogl_init_shared_palette();
685 }
686
687
688
689 int gr_palette_fade_out(ubyte *pal, int nsteps, int allow_keys)
690 {
691         gr_palette_faded_out=1;
692         return 0;
693 }
694
695
696
697 int gr_palette_fade_in(ubyte *pal, int nsteps, int allow_keys)
698 {
699         gr_palette_faded_out=0;
700         return 0;
701 }
702
703
704
705 void gr_palette_read(ubyte * pal)
706 {
707         int i;
708         for (i=0; i<768; i++ ) {
709                 pal[i]=gr_current_pal[i];
710                 if (pal[i] > 63) pal[i] = 63;
711         }
712 }
713
714 //writes out an uncompressed RGB .tga file
715 //if we got really spiffy, we could optionally link in libpng or something, and use that.
716 void write_bmp(char *savename,int w,int h,unsigned char *buf){
717         int f;
718 #ifdef _WIN32
719         f=open(savename,O_CREAT|O_EXCL|O_WRONLY,S_IREAD|S_IWRITE);
720 #else
721         f=open(savename,O_CREAT|O_EXCL|O_WRONLY,S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH);
722 #endif
723         if (f>=0){
724                 GLubyte    targaMagic[12] = { 0, //no identification field
725                          0,//no colormap
726                          2,//RGB image (well, BGR, actually)
727                          0, 0, 0, 0, 0, 0, 0, 0, 0 };//no colormap or image origin stuff.
728                 GLubyte blah;
729                 int r;
730                 GLubyte *s;
731                 int x,y;
732                 
733                 //write .TGA header.
734                 write (f,targaMagic,sizeof(targaMagic));
735                 blah=w%256;write (f,&blah,1);//w, low
736                 blah=w/256;write (f,&blah,1);//w, high
737                 blah=h%256;write (f,&blah,1);//h, low
738                 blah=h/256;write (f,&blah,1);//h, high
739                 blah=24;write (f,&blah,1);//24 bpp
740                 blah=0;write (f,&blah,1);//no attribute bits, origin is lowerleft, no interleave
741                 
742                 s=buf;
743                 for (y=0;y<h;y++){//TGAs use BGR ordering of data.
744                         for (x=0;x<w;x++){
745                                 blah=s[0];
746                                 s[0]=s[2];
747                                 s[2]=blah;
748                                 s+=3;                           
749                         }
750                 }
751                 x=0;y=w*h*3;
752                 while (y > 0)
753                 {
754                         r=write(f,buf+x,y);
755                         if (r<=0){
756                                 mprintf((0,"screenshot error, couldn't write to %s (err %i)\n",savename,errno));
757                                 break;
758                         }
759                         x+=r;y-=r;
760                 }
761                 close(f);
762         }else{
763                 mprintf((0,"screenshot error, couldn't open %s (err %i)\n",savename,errno));
764         }
765 }
766 void save_screen_shot(int automap_flag)
767 {
768 //      fix t1;
769         char message[100];
770         static int savenum=0;
771         char savename[13];
772         unsigned char *buf;
773         
774         if (!ogl_readpixels_ok){
775                 if (!automap_flag)
776                         hud_message(MSGC_GAME_FEEDBACK,"glReadPixels not supported on your configuration");
777                 return;
778         }
779
780         stop_time();
781
782 //added/changed on 10/31/98 by Victor Rachels to fix overwrite each new game
783         if ( savenum == 9999 ) savenum = 0;
784         sprintf(savename,"scrn%04d.tga",savenum++);
785
786         while(!access(savename,0))
787         {
788                 if ( savenum == 9999 ) savenum = 0;
789                 sprintf(savename,"scrn%04d.tga",savenum++);
790         }
791         sprintf( message, "%s '%s'", TXT_DUMPING_SCREEN, savename );
792 //end this section addition/change - Victor Rachels
793
794         if (automap_flag) {
795 //      save_font = grd_curcanv->cv_font;
796 //      gr_set_curfont(GAME_FONT);
797 //      gr_set_fontcolor(gr_find_closest_color_current(0,31,0),-1);
798 //      gr_get_string_size(message,&w,&h,&aw);
799 //              modex_print_message(32, 2, message);
800         } else {
801                 hud_message(MSGC_GAME_FEEDBACK,message);
802         }
803         
804         buf = d_malloc(grd_curscreen->sc_w*grd_curscreen->sc_h*3);
805         glReadBuffer(GL_FRONT);
806         glReadPixels(0,0,grd_curscreen->sc_w,grd_curscreen->sc_h,GL_RGB,GL_UNSIGNED_BYTE,buf);
807         write_bmp(savename,grd_curscreen->sc_w,grd_curscreen->sc_h,buf);
808         d_free(buf);
809
810         key_flush();
811         start_time();
812 }