implement brightness/palette effects in OGL using SetGammaRamp, much faster than...
[btb/d2x.git] / arch / ogl / gr.c
1 /* $Id: gr.c,v 1.21 2004-05-20 02:04:26 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         int t;
165         gl_vendor=glGetString(GL_VENDOR);
166         gl_renderer=glGetString(GL_RENDERER);
167         gl_version=glGetString(GL_VERSION);
168         gl_extensions=glGetString(GL_EXTENSIONS);
169
170         con_printf(CON_VERBOSE, "gl vendor:%s renderer:%s version:%s extensions:%s\n",gl_vendor,gl_renderer,gl_version,gl_extensions);
171
172         ogl_intensity4_ok = 1;
173         ogl_luminance4_alpha4_ok = 1;
174         ogl_rgba2_ok = 1;
175         ogl_gettexlevelparam_ok = 1;
176         ogl_setgammaramp_ok = 1;
177
178 #if 0 //WGL only, I think
179         dglMultiTexCoord2fARB = (glMultiTexCoord2fARB_fp)wglGetProcAddress("glMultiTexCoord2fARB");
180         dglActiveTextureARB = (glActiveTextureARB_fp)wglGetProcAddress("glActiveTextureARB");
181         dglMultiTexCoord2fSGIS = (glMultiTexCoord2fSGIS_fp)wglGetProcAddress("glMultiTexCoord2fSGIS");
182         dglSelectTextureSGIS = (glSelectTextureSGIS_fp)wglGetProcAddress("glSelectTextureSGIS");
183 #endif
184
185         //multitexturing doesn't work yet.
186 #ifdef GL_ARB_multitexture
187         ogl_arb_multitexture_ok=0;//(strstr(gl_extensions,"GL_ARB_multitexture")!=0 && glActiveTextureARB!=0 && 0);
188         mprintf((0,"c:%p d:%p e:%p\n",strstr(gl_extensions,"GL_ARB_multitexture"),glActiveTextureARB,glBegin));
189 #endif
190 #ifdef GL_SGIS_multitexture
191         ogl_sgis_multitexture_ok=0;//(strstr(gl_extensions,"GL_SGIS_multitexture")!=0 && glSelectTextureSGIS!=0 && 0);
192         mprintf((0,"a:%p b:%p\n",strstr(gl_extensions,"GL_SGIS_multitexture"),glSelectTextureSGIS));
193 #endif
194
195         //add driver specific hacks here.  whee.
196         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){
197                 ogl_intensity4_ok=0;//ignores alpha, always black background instead of transparent.
198                 ogl_readpixels_ok=0;//either just returns all black, or kills the X server entirely
199                 ogl_gettexlevelparam_ok=0;//returns random data..
200         }
201         if (stricmp(gl_vendor,"Matrox Graphics Inc.")==0){
202                 //displays garbage. reported by
203                 //  redomen@crcwnet.com (render="Matrox G400" version="1.1.3 5.52.015")
204                 //  orulz (Matrox G200)
205                 ogl_intensity4_ok=0;
206         }
207
208         //allow overriding of stuff.
209 #ifdef GL_ARB_multitexture
210         if ((t=FindArg("-gl_arb_multitexture_ok"))){
211                 ogl_arb_multitexture_ok=atoi(Args[t+1]);
212         }
213 #endif
214 #ifdef GL_SGIS_multitexture
215         if ((t=FindArg("-gl_sgis_multitexture_ok"))){
216                 ogl_sgis_multitexture_ok=atoi(Args[t+1]);
217         }
218 #endif
219         if ((t=FindArg("-gl_intensity4_ok"))){
220                 ogl_intensity4_ok=atoi(Args[t+1]);
221         }
222         if ((t=FindArg("-gl_luminance4_alpha4_ok"))){
223                 ogl_luminance4_alpha4_ok=atoi(Args[t+1]);
224         }
225         if ((t=FindArg("-gl_rgba2_ok"))){
226                 ogl_rgba2_ok=atoi(Args[t+1]);
227         }
228         if ((t=FindArg("-gl_readpixels_ok"))){
229                 ogl_readpixels_ok=atoi(Args[t+1]);
230         }
231         if ((t=FindArg("-gl_gettexlevelparam_ok"))){
232                 ogl_gettexlevelparam_ok=atoi(Args[t+1]);
233         }
234         if ((t=FindArg("-gl_setgammaramp_ok")))
235         {
236                 ogl_setgammaramp_ok = atoi(Args[t + 1]);
237         }
238
239         con_printf(CON_VERBOSE, "gl_arb_multitexture:%i gl_sgis_multitexture:%i\n",ogl_arb_multitexture_ok,ogl_sgis_multitexture_ok);
240         con_printf(CON_VERBOSE, "gl_intensity4:%i gl_luminance4_alpha4:%i gl_rgba2:%i gl_readpixels:%i gl_gettexlevelparam:%i gl_setgammaramp_ok:%i\n",ogl_intensity4_ok,ogl_luminance4_alpha4_ok,ogl_rgba2_ok,ogl_readpixels_ok,ogl_gettexlevelparam_ok, ogl_setgammaramp_ok);
241 }
242
243
244 int gr_check_mode(u_int32_t mode)
245 {
246         int w, h;
247
248         w = SM_W(mode);
249         h = SM_H(mode);
250         return ogl_check_mode(w, h); // platform specific code
251 }
252
253
254 extern int VGA_current_mode; // DPH: kludge - remove at all costs
255
256 int gr_set_mode(u_int32_t mode)
257 {
258         unsigned int w,h;
259         char *gr_bm_data;
260
261 #ifdef NOGRAPH
262 return 0;
263 #endif
264 //      mode=0;
265         if (mode<=0)
266                 return 0;
267
268         w=SM_W(mode);
269         h=SM_H(mode);
270         VGA_current_mode = mode;
271
272         //if (screen != NULL) gr_palette_clear();
273
274 //      ogl_init_state();
275         
276         gr_bm_data=grd_curscreen->sc_canvas.cv_bitmap.bm_data;//since we use realloc, we want to keep this pointer around.
277         memset( grd_curscreen, 0, sizeof(grs_screen));
278         grd_curscreen->sc_mode = mode;
279         grd_curscreen->sc_w = w;
280         grd_curscreen->sc_h = h;
281         grd_curscreen->sc_aspect = fixdiv(grd_curscreen->sc_w*3,grd_curscreen->sc_h*4);
282         grd_curscreen->sc_canvas.cv_bitmap.bm_x = 0;
283         grd_curscreen->sc_canvas.cv_bitmap.bm_y = 0;
284         grd_curscreen->sc_canvas.cv_bitmap.bm_w = w;
285         grd_curscreen->sc_canvas.cv_bitmap.bm_h = h;
286         //grd_curscreen->sc_canvas.cv_bitmap.bm_rowsize = screen->pitch;
287         grd_curscreen->sc_canvas.cv_bitmap.bm_rowsize = w;
288         grd_curscreen->sc_canvas.cv_bitmap.bm_type = BM_OGL;
289         //grd_curscreen->sc_canvas.cv_bitmap.bm_data = (unsigned char *)screen->pixels;
290 //      mprintf((0,"ogl/gr.c: reallocing %p to %i\n",grd_curscreen->sc_canvas.cv_bitmap.bm_data,w*h));
291         grd_curscreen->sc_canvas.cv_bitmap.bm_data = d_realloc(gr_bm_data,w*h);
292         gr_set_current_canvas(NULL);
293         //gr_enable_default_palette_loading();
294         
295         ogl_init_window(w,h);//platform specific code
296
297         ogl_get_verinfo();
298
299         OGL_VIEWPORT(0,0,w,h);
300
301         ogl_set_screen_mode();
302
303 //      gamefont_choose_game_font(w,h);
304         
305         return 0;
306 }
307
308 #define GLstrcmptestr(a,b) if (stricmp(a,#b)==0 || stricmp(a,"GL_" #b)==0)return GL_ ## b;
309 int ogl_atotexfilti(char *a,int min){
310         GLstrcmptestr(a,NEAREST);
311         GLstrcmptestr(a,LINEAR);
312         if (min){//mipmaps are valid only for the min filter
313                 GLstrcmptestr(a,NEAREST_MIPMAP_NEAREST);
314                 GLstrcmptestr(a,NEAREST_MIPMAP_LINEAR);
315                 GLstrcmptestr(a,LINEAR_MIPMAP_NEAREST);
316                 GLstrcmptestr(a,LINEAR_MIPMAP_LINEAR);
317         }
318         Error("unknown/invalid texture filter %s\n",a);
319 //      return GL_NEAREST;
320 }
321 int ogl_testneedmipmaps(int i){
322         switch (i){
323                 case GL_NEAREST:
324                 case GL_LINEAR:
325                         return 0;
326                 case GL_NEAREST_MIPMAP_NEAREST:
327                 case GL_NEAREST_MIPMAP_LINEAR:
328                 case GL_LINEAR_MIPMAP_NEAREST:
329                 case GL_LINEAR_MIPMAP_LINEAR:
330                         return 1;
331         }
332         Error("unknown texture filter %x\n",i);
333 //      return -1;
334 }
335 #ifdef OGL_RUNTIME_LOAD
336 #ifdef _WIN32
337 char *OglLibPath="opengl32.dll";
338 #endif
339 #ifdef __unix__
340 char *OglLibPath="libGL.so";
341 #endif
342
343 int ogl_rt_loaded=0;
344 int ogl_init_load_library(void)
345 {
346         int retcode=0;
347         if (!ogl_rt_loaded){
348                 int t;
349                 if ((t=FindArg("-gl_library")))
350                         OglLibPath=Args[t+1];
351
352                 retcode = OpenGL_LoadLibrary(true);
353                 if(retcode)
354                 {
355                         mprintf((0,"Opengl loaded ok\n"));
356         
357                         if(!glEnd)
358                         {
359                                 Error("Opengl: Functions not imported\n");
360                         }
361                 }else{
362                         Error("Opengl: error loading %s\n",OglLibPath);
363                 }
364                 ogl_rt_loaded=1;
365         }
366         return retcode;
367 }
368 #endif
369
370 int gr_init()
371 {
372         int mode = SM(640,480);
373         int retcode, t, glt = 0;
374
375         // Only do this function once!
376         if (gr_installed==1)
377                 return -1;
378
379
380 #ifdef OGL_RUNTIME_LOAD
381         ogl_init_load_library();
382 #endif
383
384 #ifdef GR_SUPPORTS_FULLSCREEN_TOGGLE
385         if (FindArg("-gl_voodoo")){
386                 ogl_voodoohack=1;
387                 gr_toggle_fullscreen();
388         }
389         if (FindArg("-fullscreen"))
390                 gr_toggle_fullscreen();
391 #endif
392         if ((glt=FindArg("-gl_alttexmerge")))
393                 ogl_alttexmerge=1;
394         if ((t=FindArg("-gl_stdtexmerge")))
395                 if (t>=glt)//allow overriding of earlier args
396                         ogl_alttexmerge=0;
397                         
398         if ((glt=FindArg("-gl_16bittextures")))
399                 ogl_rgba_format=GL_RGB5_A1;
400
401         if ((glt=FindArg("-gl_mipmap"))){
402                 GL_texmagfilt=GL_LINEAR;
403                 GL_texminfilt=GL_LINEAR_MIPMAP_NEAREST;
404         }
405         if ((glt=FindArg("-gl_trilinear")))
406         {
407                 GL_texmagfilt = GL_LINEAR;
408                 GL_texminfilt = GL_LINEAR_MIPMAP_LINEAR;
409         }
410         if ((t=FindArg("-gl_simple"))){
411                 if (t>=glt){//allow overriding of earlier args
412                         glt=t;
413                         GL_texmagfilt=GL_NEAREST;
414                         GL_texminfilt=GL_NEAREST;
415                 }
416         }
417         if ((t=FindArg("-gl_texmagfilt")) || (t=FindArg("-gl_texmagfilter"))){
418                 if (t>=glt)//allow overriding of earlier args
419                         GL_texmagfilt=ogl_atotexfilti(Args[t+1],0);
420         }
421         if ((t=FindArg("-gl_texminfilt")) || (t=FindArg("-gl_texminfilter"))){
422                 if (t>=glt)//allow overriding of earlier args
423                         GL_texminfilt=ogl_atotexfilti(Args[t+1],1);
424         }
425         GL_needmipmaps=ogl_testneedmipmaps(GL_texminfilt);
426         mprintf((0,"gr_init: texmagfilt:%x texminfilt:%x needmipmaps=%i\n",GL_texmagfilt,GL_texminfilt,GL_needmipmaps));
427         
428         if ((t=FindArg("-gl_vidmem"))){
429                 ogl_mem_target=atoi(Args[t+1])*1024*1024;
430         }
431         if ((t=FindArg("-gl_reticle"))){
432                 gl_reticle=atoi(Args[t+1]);
433         }
434         //printf("ogl_mem_target=%i\n",ogl_mem_target);
435         
436         ogl_init();//platform specific initialization
437
438         ogl_init_texture_list_internal();
439                 
440         MALLOC( grd_curscreen,grs_screen,1 );
441         memset( grd_curscreen, 0, sizeof(grs_screen));
442         grd_curscreen->sc_canvas.cv_bitmap.bm_data = NULL;
443
444         // Set the mode.
445         if ((retcode=gr_set_mode(mode)))
446         {
447                 return retcode;
448         }
449
450         grd_curscreen->sc_canvas.cv_color = 0;
451         grd_curscreen->sc_canvas.cv_drawmode = 0;
452         grd_curscreen->sc_canvas.cv_font = NULL;
453         grd_curscreen->sc_canvas.cv_font_fg_color = 0;
454         grd_curscreen->sc_canvas.cv_font_bg_color = 0;
455         gr_set_current_canvas( &grd_curscreen->sc_canvas );
456
457         gr_installed = 1;
458         
459         atexit(gr_close);
460
461         return 0;
462 }
463
464 void gr_close()
465 {
466 //      mprintf((0,"ogl init: %s %s %s - %s\n",glGetString(GL_VENDOR),glGetString(GL_RENDERER),glGetString(GL_VERSION),glGetString,(GL_EXTENSIONS)));
467
468         ogl_close();//platform specific code
469         if (grd_curscreen){
470                 if (grd_curscreen->sc_canvas.cv_bitmap.bm_data)
471                         d_free(grd_curscreen->sc_canvas.cv_bitmap.bm_data);
472                 d_free(grd_curscreen);
473         }
474 #ifdef OGL_RUNTIME_LOAD
475         if (ogl_rt_loaded)
476                 OpenGL_LoadLibrary(false);
477 #endif
478 }
479 extern int r_upixelc;
480 void ogl_upixelc(int x, int y, int c){
481         r_upixelc++;
482 //      printf("gr_upixelc(%i,%i,%i)%i\n",x,y,c,Function_mode==FMODE_GAME);
483 //      if(Function_mode != FMODE_GAME){
484 //              grd_curcanv->cv_bitmap.bm_data[y*grd_curscreen->sc_canvas.cv_bitmap.bm_w+x]=c;
485 //      }else{
486                 OGL_DISABLE(TEXTURE_2D);
487                 glPointSize(1.0);
488                 glBegin(GL_POINTS);
489 //              glBegin(GL_LINES);
490 //      ogl_pal=gr_current_pal;
491                 glColor3f(CPAL2Tr(c),CPAL2Tg(c),CPAL2Tb(c));
492 //      ogl_pal=gr_palette;
493                 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);
494 //              glVertex2f(x/((float)last_width+1),1.0-y/((float)last_height+1));
495                 glEnd();
496 //      }
497 }
498 void ogl_urect(int left,int top,int right,int bot){
499         GLfloat xo,yo,xf,yf;
500         int c=COLOR;
501         
502         xo=(left+grd_curcanv->cv_bitmap.bm_x)/(float)last_width;
503         xf = (right + 1 + grd_curcanv->cv_bitmap.bm_x) / (float)last_width;
504         yo=1.0-(top+grd_curcanv->cv_bitmap.bm_y)/(float)last_height;
505         yf = 1.0 - (bot + 1 + grd_curcanv->cv_bitmap.bm_y) / (float)last_height;
506
507         OGL_DISABLE(TEXTURE_2D);
508         glColor3f(CPAL2Tr(c),CPAL2Tg(c),CPAL2Tb(c));
509         glBegin(GL_QUADS);
510         glVertex2f(xo,yo);
511         glVertex2f(xo,yf);
512         glVertex2f(xf,yf);
513         glVertex2f(xf,yo);
514         glEnd();
515 }
516 void ogl_ulinec(int left,int top,int right,int bot,int c){
517         GLfloat xo,yo,xf,yf;
518
519         xo = (left + grd_curcanv->cv_bitmap.bm_x + 0.5) / (float)last_width;
520         xf = (right + grd_curcanv->cv_bitmap.bm_x + 0.5) / (float)last_width;
521         yo = 1.0 - (top + grd_curcanv->cv_bitmap.bm_y + 0.5) / (float)last_height;
522         yf = 1.0 - (bot + grd_curcanv->cv_bitmap.bm_y + 0.5) / (float)last_height;
523
524         OGL_DISABLE(TEXTURE_2D);
525         glColor3f(CPAL2Tr(c),CPAL2Tg(c),CPAL2Tb(c));
526         glBegin(GL_LINES);
527         glVertex2f(xo,yo);
528         glVertex2f(xf,yf);
529         glEnd();
530 }
531         
532
533 GLfloat last_r=0, last_g=0, last_b=0;
534 int do_pal_step=0;
535 void ogl_do_palfx(void){
536 //      GLfloat r,g,b,a;
537         OGL_DISABLE(TEXTURE_2D);
538         if (gr_palette_faded_out){
539 /*              glEnable(GL_BLEND);
540                 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);*/
541                 glColor3f(0,0,0);
542 //              r=g=b=0.0;a=1.0;
543         }else{
544                 if (do_pal_step){
545                         //glBlendFunc(GL_SRC_COLOR, GL_DST_COLOR);
546                         glEnable(GL_BLEND);
547                         glBlendFunc(GL_ONE,GL_ONE);
548                         glColor3f(last_r,last_g,last_b);
549 //                      r=f2fl(last_r);g=f2fl(last_g);b=f2fl(last_b);a=0.5;
550                 }else
551                         return;
552         }
553         
554         
555         glBegin(GL_QUADS);
556         glVertex2f(0,0);
557         glVertex2f(0,1);
558         glVertex2f(1,1);
559         glVertex2f(1,0);
560         glEnd();
561         
562         glEnable(GL_BLEND);     
563         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
564 }
565
566 void gr_palette_clear()
567 {
568         gr_palette_faded_out=1;
569 }
570
571
572 int ogl_brightness_ok = 0;
573 int ogl_setgammaramp_ok = 1;
574 int ogl_brightness_r = 0, ogl_brightness_g = 0, ogl_brightness_b = 0;
575 static int old_b_r = 0, old_b_g = 0, old_b_b = 0;
576
577 void gr_palette_step_up(int r, int g, int b)
578 {
579         if (gr_palette_faded_out)
580                 return;
581
582         old_b_r = ogl_brightness_r;
583         old_b_g = ogl_brightness_g;
584         old_b_b = ogl_brightness_b;
585
586         ogl_brightness_r = r + gr_palette_gamma;
587         ogl_brightness_g = g + gr_palette_gamma;
588         ogl_brightness_b = b + gr_palette_gamma;
589
590         if (ogl_setgammaramp_ok &&
591             (old_b_r != ogl_brightness_r ||
592              old_b_g != ogl_brightness_g ||
593              old_b_b != ogl_brightness_b))
594                 ogl_brightness_ok = !ogl_setbrightness_internal();
595
596         if (!ogl_setgammaramp_ok || !ogl_brightness_ok)
597         {
598                 last_r = ogl_brightness_r / 63.0;
599                 last_g = ogl_brightness_g / 63.0;
600                 last_b = ogl_brightness_b / 63.0;
601
602                 do_pal_step = (r || g || b || gr_palette_gamma);
603         }
604         else
605         {
606                 do_pal_step = 0;
607         }
608 }
609
610 //added on 980913 by adb to fix palette problems
611 // need a min without side effects...
612 #undef min
613 static inline int min(int x, int y) { return x < y ? x : y; }
614 //end changes by adb
615
616 void gr_palette_load( ubyte *pal )      
617 {
618  int i;//, j;
619
620  for (i=0; i<768; i++ ) {
621      gr_current_pal[i] = pal[i];
622      if (gr_current_pal[i] > 63) gr_current_pal[i] = 63;
623  }
624  //palette = screen->format->palette;
625
626  gr_palette_faded_out=0;
627
628         gr_palette_step_up(0, 0, 0); // make ogl_setbrightness_internal get run so that menus get brightened too.
629
630  init_computed_colors();
631 }
632
633
634
635 int gr_palette_fade_out(ubyte *pal, int nsteps, int allow_keys)
636 {
637         gr_palette_faded_out=1;
638         return 0;
639 }
640
641
642
643 int gr_palette_fade_in(ubyte *pal, int nsteps, int allow_keys)
644 {
645         gr_palette_faded_out=0;
646         return 0;
647 }
648
649
650
651 void gr_palette_read(ubyte * pal)
652 {
653         int i;
654         for (i=0; i<768; i++ ) {
655                 pal[i]=gr_current_pal[i];
656                 if (pal[i] > 63) pal[i] = 63;
657         }
658 }
659
660 //writes out an uncompressed RGB .tga file
661 //if we got really spiffy, we could optionally link in libpng or something, and use that.
662 void write_bmp(char *savename,int w,int h,unsigned char *buf){
663         int f;
664 #ifdef _WIN32
665         f=open(savename,O_CREAT|O_EXCL|O_WRONLY,S_IREAD|S_IWRITE);
666 #else
667         f=open(savename,O_CREAT|O_EXCL|O_WRONLY,S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH);
668 #endif
669         if (f>=0){
670                 GLubyte    targaMagic[12] = { 0, //no identification field
671                          0,//no colormap
672                          2,//RGB image (well, BGR, actually)
673                          0, 0, 0, 0, 0, 0, 0, 0, 0 };//no colormap or image origin stuff.
674                 GLubyte blah;
675                 int r;
676                 GLubyte *s;
677                 int x,y;
678                 
679                 //write .TGA header.
680                 write (f,targaMagic,sizeof(targaMagic));
681                 blah=w%256;write (f,&blah,1);//w, low
682                 blah=w/256;write (f,&blah,1);//w, high
683                 blah=h%256;write (f,&blah,1);//h, low
684                 blah=h/256;write (f,&blah,1);//h, high
685                 blah=24;write (f,&blah,1);//24 bpp
686                 blah=0;write (f,&blah,1);//no attribute bits, origin is lowerleft, no interleave
687                 
688                 s=buf;
689                 for (y=0;y<h;y++){//TGAs use BGR ordering of data.
690                         for (x=0;x<w;x++){
691                                 blah=s[0];
692                                 s[0]=s[2];
693                                 s[2]=blah;
694                                 s+=3;                           
695                         }
696                 }
697                 x=0;y=w*h*3;
698                 while (x<y){
699                         r=write(f,buf+x,y);
700                         if (r<=0){
701                                 mprintf((0,"screenshot error, couldn't write to %s (err %i)\n",savename,errno));
702                                 break;
703                         }
704                         x+=r;y-=r;
705                 }
706                 close(f);
707         }else{
708                 mprintf((0,"screenshot error, couldn't open %s (err %i)\n",savename,errno));
709         }
710 }
711 void save_screen_shot(int automap_flag)
712 {
713 //      fix t1;
714         char message[100];
715         static int savenum=0;
716         char savename[13];
717         unsigned char *buf;
718         
719         if (!ogl_readpixels_ok){
720                 if (!automap_flag)
721                         hud_message(MSGC_GAME_FEEDBACK,"glReadPixels not supported on your configuration");
722                 return;
723         }
724
725         stop_time();
726
727 //added/changed on 10/31/98 by Victor Rachels to fix overwrite each new game
728         if ( savenum == 9999 ) savenum = 0;
729         sprintf(savename,"scrn%04d.tga",savenum++);
730
731         while(!access(savename,0))
732         {
733                 if ( savenum == 9999 ) savenum = 0;
734                 sprintf(savename,"scrn%04d.tga",savenum++);
735         }
736         sprintf( message, "%s '%s'", TXT_DUMPING_SCREEN, savename );
737 //end this section addition/change - Victor Rachels
738
739         if (automap_flag) {
740 //      save_font = grd_curcanv->cv_font;
741 //      gr_set_curfont(GAME_FONT);
742 //      gr_set_fontcolor(gr_find_closest_color_current(0,31,0),-1);
743 //      gr_get_string_size(message,&w,&h,&aw);
744 //              modex_print_message(32, 2, message);
745         } else {
746                 hud_message(MSGC_GAME_FEEDBACK,message);
747         }
748         
749         buf = d_malloc(grd_curscreen->sc_w*grd_curscreen->sc_h*3);
750         glReadBuffer(GL_FRONT);
751         glReadPixels(0,0,grd_curscreen->sc_w,grd_curscreen->sc_h,GL_RGB,GL_UNSIGNED_BYTE,buf);
752         write_bmp(savename,grd_curscreen->sc_w,grd_curscreen->sc_h,buf);
753         d_free(buf);
754
755         key_flush();
756         start_time();
757 }