1 /* $Id: gr.c,v 1.22 2004-05-20 03:31:31 btb Exp $ */
4 * OGL video functions. - Added 9/15/99 Matthew Mueller
20 #if defined(__APPLE__) && defined(__MACH__)
21 //#include <OpenGL/gl.h>
28 #include <sys/types.h>
53 #if defined(__APPLE__) && defined(__MACH__)
54 #include <OpenGL/glu.h>
55 #undef GL_ARB_multitexture // hack!
65 void gr_palette_clear(); // Function prototype for gr_init;
71 int gr_check_fullscreen(void){
72 return ogl_fullscreen;
75 void gr_do_fullscreen(int f){
77 ogl_fullscreen=1;//force fullscreen mode on voodoos.
81 ogl_do_fullscreen_internal();
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;
91 int arch_toggle_fullscreen_menu(void){
92 unsigned char *buf=NULL;
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);
100 gr_do_fullscreen(!ogl_fullscreen);
102 if (ogl_readpixels_ok){
103 // glWritePixels(0,0,grd_curscreen->sc_w,grd_curscreen->sc_h,GL_RGB,GL_UNSIGNED_BYTE,buf);
105 glDrawPixels(grd_curscreen->sc_w,grd_curscreen->sc_h,GL_RGB,GL_UNSIGNED_BYTE,buf);
108 // grd_curscreen->sc_mode=0;//hack to get it to reset screen mode
110 return ogl_fullscreen;
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);
118 /* initialize viewing values */
119 glMatrixMode(GL_PROJECTION);
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
127 int last_screen_mode=-1;
129 void ogl_set_screen_mode(void){
130 if (last_screen_mode==Screen_mode)
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);
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
146 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
148 last_screen_mode=Screen_mode;
155 if(Screen_mode != SCREEN_GAME){
161 const char *gl_vendor,*gl_renderer,*gl_version,*gl_extensions;
163 void ogl_get_verinfo(void)
165 int t, arb_max_textures = -1, sgi_max_textures = -1;
166 gl_vendor=glGetString(GL_VENDOR);
167 gl_renderer=glGetString(GL_RENDERER);
168 gl_version=glGetString(GL_VERSION);
169 gl_extensions=glGetString(GL_EXTENSIONS);
171 con_printf(CON_VERBOSE, "gl vendor:%s renderer:%s version:%s extensions:%s\n",gl_vendor,gl_renderer,gl_version,gl_extensions);
173 ogl_intensity4_ok = 1;
174 ogl_luminance4_alpha4_ok = 1;
176 ogl_gettexlevelparam_ok = 1;
177 ogl_setgammaramp_ok = 1;
179 #if 0 //WGL only, I think
180 dglMultiTexCoord2fARB = (glMultiTexCoord2fARB_fp)wglGetProcAddress("glMultiTexCoord2fARB");
181 dglActiveTextureARB = (glActiveTextureARB_fp)wglGetProcAddress("glActiveTextureARB");
182 dglMultiTexCoord2fSGIS = (glMultiTexCoord2fSGIS_fp)wglGetProcAddress("glMultiTexCoord2fSGIS");
183 dglSelectTextureSGIS = (glSelectTextureSGIS_fp)wglGetProcAddress("glSelectTextureSGIS");
186 #ifdef GL_ARB_multitexture
187 ogl_arb_multitexture_ok = (strstr(gl_extensions, "GL_ARB_multitexture") != 0 && glActiveTextureARB != 0);
188 mprintf((0,"c:%p d:%p e:%p\n",strstr(gl_extensions,"GL_ARB_multitexture"),glActiveTextureARB,glBegin));
190 #ifdef GL_SGIS_multitexture
191 ogl_sgis_multitexture_ok = (strstr(gl_extensions, "GL_SGIS_multitexture") != 0 && glSelectTextureSGIS != 0);
192 mprintf((0,"a:%p b:%p\n",strstr(gl_extensions,"GL_SGIS_multitexture"),glSelectTextureSGIS));
194 ogl_nv_texture_env_combine4_ok = (strstr(gl_extensions, "GL_NV_texture_env_combine4") != 0);
196 //add driver specific hacks here. whee.
197 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){
198 ogl_intensity4_ok=0;//ignores alpha, always black background instead of transparent.
199 ogl_readpixels_ok=0;//either just returns all black, or kills the X server entirely
200 ogl_gettexlevelparam_ok=0;//returns random data..
202 if (stricmp(gl_vendor,"Matrox Graphics Inc.")==0){
203 //displays garbage. reported by
204 // redomen@crcwnet.com (render="Matrox G400" version="1.1.3 5.52.015")
205 // orulz (Matrox G200)
209 //allow overriding of stuff.
210 #ifdef GL_ARB_multitexture
211 if ((t=FindArg("-gl_arb_multitexture_ok"))){
212 ogl_arb_multitexture_ok=atoi(Args[t+1]);
214 if (ogl_arb_multitexture_ok)
215 glGetIntegerv(GL_MAX_TEXTURE_UNITS_ARB, &arb_max_textures);
217 #ifdef GL_SGIS_multitexture
218 if ((t=FindArg("-gl_sgis_multitexture_ok"))){
219 ogl_sgis_multitexture_ok=atoi(Args[t+1]);
221 if (ogl_sgis_multitexture_ok)
222 glGetIntegerv(GL_MAX_TEXTURES_SGIS, &sgi_max_textures);
224 if ((t=FindArg("-gl_intensity4_ok"))){
225 ogl_intensity4_ok=atoi(Args[t+1]);
227 if ((t=FindArg("-gl_luminance4_alpha4_ok"))){
228 ogl_luminance4_alpha4_ok=atoi(Args[t+1]);
230 if ((t=FindArg("-gl_rgba2_ok"))){
231 ogl_rgba2_ok=atoi(Args[t+1]);
233 if ((t=FindArg("-gl_readpixels_ok"))){
234 ogl_readpixels_ok=atoi(Args[t+1]);
236 if ((t=FindArg("-gl_gettexlevelparam_ok"))){
237 ogl_gettexlevelparam_ok=atoi(Args[t+1]);
239 if ((t=FindArg("-gl_setgammaramp_ok")))
241 ogl_setgammaramp_ok = atoi(Args[t + 1]);
244 con_printf(CON_VERBOSE, "gl_arb_multitexture:%i(%i units) gl_sgis_multitexture:%i(%i units) gl_nv_texture_env_combine4:%i\n", ogl_arb_multitexture_ok, arb_max_textures, ogl_sgis_multitexture_ok, sgi_max_textures, ogl_nv_texture_env_combine4_ok);
245 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);
249 int gr_check_mode(u_int32_t mode)
255 return ogl_check_mode(w, h); // platform specific code
259 extern int VGA_current_mode; // DPH: kludge - remove at all costs
261 int gr_set_mode(u_int32_t mode)
275 VGA_current_mode = mode;
277 //if (screen != NULL) gr_palette_clear();
281 gr_bm_data=grd_curscreen->sc_canvas.cv_bitmap.bm_data;//since we use realloc, we want to keep this pointer around.
282 memset( grd_curscreen, 0, sizeof(grs_screen));
283 grd_curscreen->sc_mode = mode;
284 grd_curscreen->sc_w = w;
285 grd_curscreen->sc_h = h;
286 grd_curscreen->sc_aspect = fixdiv(grd_curscreen->sc_w*3,grd_curscreen->sc_h*4);
287 grd_curscreen->sc_canvas.cv_bitmap.bm_x = 0;
288 grd_curscreen->sc_canvas.cv_bitmap.bm_y = 0;
289 grd_curscreen->sc_canvas.cv_bitmap.bm_w = w;
290 grd_curscreen->sc_canvas.cv_bitmap.bm_h = h;
291 //grd_curscreen->sc_canvas.cv_bitmap.bm_rowsize = screen->pitch;
292 grd_curscreen->sc_canvas.cv_bitmap.bm_rowsize = w;
293 grd_curscreen->sc_canvas.cv_bitmap.bm_type = BM_OGL;
294 //grd_curscreen->sc_canvas.cv_bitmap.bm_data = (unsigned char *)screen->pixels;
295 // mprintf((0,"ogl/gr.c: reallocing %p to %i\n",grd_curscreen->sc_canvas.cv_bitmap.bm_data,w*h));
296 grd_curscreen->sc_canvas.cv_bitmap.bm_data = d_realloc(gr_bm_data,w*h);
297 gr_set_current_canvas(NULL);
298 //gr_enable_default_palette_loading();
300 ogl_init_window(w,h);//platform specific code
304 OGL_VIEWPORT(0,0,w,h);
306 ogl_set_screen_mode();
308 // gamefont_choose_game_font(w,h);
313 #define GLstrcmptestr(a,b) if (stricmp(a,#b)==0 || stricmp(a,"GL_" #b)==0)return GL_ ## b;
314 int ogl_atotexfilti(char *a,int min){
315 GLstrcmptestr(a,NEAREST);
316 GLstrcmptestr(a,LINEAR);
317 if (min){//mipmaps are valid only for the min filter
318 GLstrcmptestr(a,NEAREST_MIPMAP_NEAREST);
319 GLstrcmptestr(a,NEAREST_MIPMAP_LINEAR);
320 GLstrcmptestr(a,LINEAR_MIPMAP_NEAREST);
321 GLstrcmptestr(a,LINEAR_MIPMAP_LINEAR);
323 Error("unknown/invalid texture filter %s\n",a);
324 // return GL_NEAREST;
326 int ogl_testneedmipmaps(int i){
331 case GL_NEAREST_MIPMAP_NEAREST:
332 case GL_NEAREST_MIPMAP_LINEAR:
333 case GL_LINEAR_MIPMAP_NEAREST:
334 case GL_LINEAR_MIPMAP_LINEAR:
337 Error("unknown texture filter %x\n",i);
340 #ifdef OGL_RUNTIME_LOAD
342 char *OglLibPath="opengl32.dll";
345 char *OglLibPath="libGL.so";
349 int ogl_init_load_library(void)
354 if ((t=FindArg("-gl_library")))
355 OglLibPath=Args[t+1];
357 retcode = OpenGL_LoadLibrary(true);
360 mprintf((0,"Opengl loaded ok\n"));
364 Error("Opengl: Functions not imported\n");
367 Error("Opengl: error loading %s\n",OglLibPath);
377 int mode = SM(640,480);
378 int retcode, t, glt = 0;
380 // Only do this function once!
385 #ifdef OGL_RUNTIME_LOAD
386 ogl_init_load_library();
389 #ifdef GR_SUPPORTS_FULLSCREEN_TOGGLE
390 if (FindArg("-gl_voodoo")){
392 gr_toggle_fullscreen();
394 if (FindArg("-fullscreen"))
395 gr_toggle_fullscreen();
397 if ((glt=FindArg("-gl_alttexmerge")))
399 if ((t=FindArg("-gl_stdtexmerge")))
400 if (t>=glt)//allow overriding of earlier args
403 if ((glt=FindArg("-gl_16bittextures")))
404 ogl_rgba_format=GL_RGB5_A1;
406 if ((glt=FindArg("-gl_mipmap"))){
407 GL_texmagfilt=GL_LINEAR;
408 GL_texminfilt=GL_LINEAR_MIPMAP_NEAREST;
410 if ((glt=FindArg("-gl_trilinear")))
412 GL_texmagfilt = GL_LINEAR;
413 GL_texminfilt = GL_LINEAR_MIPMAP_LINEAR;
415 if ((t=FindArg("-gl_simple"))){
416 if (t>=glt){//allow overriding of earlier args
418 GL_texmagfilt=GL_NEAREST;
419 GL_texminfilt=GL_NEAREST;
422 if ((t=FindArg("-gl_texmagfilt")) || (t=FindArg("-gl_texmagfilter"))){
423 if (t>=glt)//allow overriding of earlier args
424 GL_texmagfilt=ogl_atotexfilti(Args[t+1],0);
426 if ((t=FindArg("-gl_texminfilt")) || (t=FindArg("-gl_texminfilter"))){
427 if (t>=glt)//allow overriding of earlier args
428 GL_texminfilt=ogl_atotexfilti(Args[t+1],1);
430 GL_needmipmaps=ogl_testneedmipmaps(GL_texminfilt);
431 mprintf((0,"gr_init: texmagfilt:%x texminfilt:%x needmipmaps=%i\n",GL_texmagfilt,GL_texminfilt,GL_needmipmaps));
433 if ((t=FindArg("-gl_vidmem"))){
434 ogl_mem_target=atoi(Args[t+1])*1024*1024;
436 if ((t=FindArg("-gl_reticle"))){
437 gl_reticle=atoi(Args[t+1]);
439 //printf("ogl_mem_target=%i\n",ogl_mem_target);
441 ogl_init();//platform specific initialization
443 ogl_init_texture_list_internal();
445 MALLOC( grd_curscreen,grs_screen,1 );
446 memset( grd_curscreen, 0, sizeof(grs_screen));
447 grd_curscreen->sc_canvas.cv_bitmap.bm_data = NULL;
450 if ((retcode=gr_set_mode(mode)))
455 grd_curscreen->sc_canvas.cv_color = 0;
456 grd_curscreen->sc_canvas.cv_drawmode = 0;
457 grd_curscreen->sc_canvas.cv_font = NULL;
458 grd_curscreen->sc_canvas.cv_font_fg_color = 0;
459 grd_curscreen->sc_canvas.cv_font_bg_color = 0;
460 gr_set_current_canvas( &grd_curscreen->sc_canvas );
471 // mprintf((0,"ogl init: %s %s %s - %s\n",glGetString(GL_VENDOR),glGetString(GL_RENDERER),glGetString(GL_VERSION),glGetString,(GL_EXTENSIONS)));
473 ogl_close();//platform specific code
475 if (grd_curscreen->sc_canvas.cv_bitmap.bm_data)
476 d_free(grd_curscreen->sc_canvas.cv_bitmap.bm_data);
477 d_free(grd_curscreen);
479 #ifdef OGL_RUNTIME_LOAD
481 OpenGL_LoadLibrary(false);
484 extern int r_upixelc;
485 void ogl_upixelc(int x, int y, int c){
487 // printf("gr_upixelc(%i,%i,%i)%i\n",x,y,c,Function_mode==FMODE_GAME);
488 // if(Function_mode != FMODE_GAME){
489 // grd_curcanv->cv_bitmap.bm_data[y*grd_curscreen->sc_canvas.cv_bitmap.bm_w+x]=c;
491 OGL_DISABLE(TEXTURE_2D);
494 // glBegin(GL_LINES);
495 // ogl_pal=gr_current_pal;
496 glColor3f(CPAL2Tr(c),CPAL2Tg(c),CPAL2Tb(c));
497 // ogl_pal=gr_palette;
498 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);
499 // glVertex2f(x/((float)last_width+1),1.0-y/((float)last_height+1));
503 void ogl_urect(int left,int top,int right,int bot){
507 xo=(left+grd_curcanv->cv_bitmap.bm_x)/(float)last_width;
508 xf = (right + 1 + grd_curcanv->cv_bitmap.bm_x) / (float)last_width;
509 yo=1.0-(top+grd_curcanv->cv_bitmap.bm_y)/(float)last_height;
510 yf = 1.0 - (bot + 1 + grd_curcanv->cv_bitmap.bm_y) / (float)last_height;
512 OGL_DISABLE(TEXTURE_2D);
513 glColor3f(CPAL2Tr(c),CPAL2Tg(c),CPAL2Tb(c));
521 void ogl_ulinec(int left,int top,int right,int bot,int c){
524 xo = (left + grd_curcanv->cv_bitmap.bm_x + 0.5) / (float)last_width;
525 xf = (right + grd_curcanv->cv_bitmap.bm_x + 0.5) / (float)last_width;
526 yo = 1.0 - (top + grd_curcanv->cv_bitmap.bm_y + 0.5) / (float)last_height;
527 yf = 1.0 - (bot + grd_curcanv->cv_bitmap.bm_y + 0.5) / (float)last_height;
529 OGL_DISABLE(TEXTURE_2D);
530 glColor3f(CPAL2Tr(c),CPAL2Tg(c),CPAL2Tb(c));
538 GLfloat last_r=0, last_g=0, last_b=0;
540 void ogl_do_palfx(void){
542 OGL_DISABLE(TEXTURE_2D);
543 if (gr_palette_faded_out){
544 /* glEnable(GL_BLEND);
545 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);*/
550 //glBlendFunc(GL_SRC_COLOR, GL_DST_COLOR);
552 glBlendFunc(GL_ONE,GL_ONE);
553 glColor3f(last_r,last_g,last_b);
554 // r=f2fl(last_r);g=f2fl(last_g);b=f2fl(last_b);a=0.5;
568 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
571 void gr_palette_clear()
573 gr_palette_faded_out=1;
577 int ogl_brightness_ok = 0;
578 int ogl_setgammaramp_ok = 1;
579 int ogl_brightness_r = 0, ogl_brightness_g = 0, ogl_brightness_b = 0;
580 static int old_b_r = 0, old_b_g = 0, old_b_b = 0;
582 void gr_palette_step_up(int r, int g, int b)
584 if (gr_palette_faded_out)
587 old_b_r = ogl_brightness_r;
588 old_b_g = ogl_brightness_g;
589 old_b_b = ogl_brightness_b;
591 ogl_brightness_r = r + gr_palette_gamma;
592 ogl_brightness_g = g + gr_palette_gamma;
593 ogl_brightness_b = b + gr_palette_gamma;
595 if (ogl_setgammaramp_ok &&
596 (old_b_r != ogl_brightness_r ||
597 old_b_g != ogl_brightness_g ||
598 old_b_b != ogl_brightness_b))
599 ogl_brightness_ok = !ogl_setbrightness_internal();
601 if (!ogl_setgammaramp_ok || !ogl_brightness_ok)
603 last_r = ogl_brightness_r / 63.0;
604 last_g = ogl_brightness_g / 63.0;
605 last_b = ogl_brightness_b / 63.0;
607 do_pal_step = (r || g || b || gr_palette_gamma);
615 //added on 980913 by adb to fix palette problems
616 // need a min without side effects...
618 static inline int min(int x, int y) { return x < y ? x : y; }
621 void gr_palette_load( ubyte *pal )
625 for (i=0; i<768; i++ ) {
626 gr_current_pal[i] = pal[i];
627 if (gr_current_pal[i] > 63) gr_current_pal[i] = 63;
629 //palette = screen->format->palette;
631 gr_palette_faded_out=0;
633 gr_palette_step_up(0, 0, 0); // make ogl_setbrightness_internal get run so that menus get brightened too.
635 init_computed_colors();
640 int gr_palette_fade_out(ubyte *pal, int nsteps, int allow_keys)
642 gr_palette_faded_out=1;
648 int gr_palette_fade_in(ubyte *pal, int nsteps, int allow_keys)
650 gr_palette_faded_out=0;
656 void gr_palette_read(ubyte * pal)
659 for (i=0; i<768; i++ ) {
660 pal[i]=gr_current_pal[i];
661 if (pal[i] > 63) pal[i] = 63;
665 //writes out an uncompressed RGB .tga file
666 //if we got really spiffy, we could optionally link in libpng or something, and use that.
667 void write_bmp(char *savename,int w,int h,unsigned char *buf){
670 f=open(savename,O_CREAT|O_EXCL|O_WRONLY,S_IREAD|S_IWRITE);
672 f=open(savename,O_CREAT|O_EXCL|O_WRONLY,S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH);
675 GLubyte targaMagic[12] = { 0, //no identification field
677 2,//RGB image (well, BGR, actually)
678 0, 0, 0, 0, 0, 0, 0, 0, 0 };//no colormap or image origin stuff.
685 write (f,targaMagic,sizeof(targaMagic));
686 blah=w%256;write (f,&blah,1);//w, low
687 blah=w/256;write (f,&blah,1);//w, high
688 blah=h%256;write (f,&blah,1);//h, low
689 blah=h/256;write (f,&blah,1);//h, high
690 blah=24;write (f,&blah,1);//24 bpp
691 blah=0;write (f,&blah,1);//no attribute bits, origin is lowerleft, no interleave
694 for (y=0;y<h;y++){//TGAs use BGR ordering of data.
706 mprintf((0,"screenshot error, couldn't write to %s (err %i)\n",savename,errno));
713 mprintf((0,"screenshot error, couldn't open %s (err %i)\n",savename,errno));
716 void save_screen_shot(int automap_flag)
720 static int savenum=0;
724 if (!ogl_readpixels_ok){
726 hud_message(MSGC_GAME_FEEDBACK,"glReadPixels not supported on your configuration");
732 //added/changed on 10/31/98 by Victor Rachels to fix overwrite each new game
733 if ( savenum == 9999 ) savenum = 0;
734 sprintf(savename,"scrn%04d.tga",savenum++);
736 while(!access(savename,0))
738 if ( savenum == 9999 ) savenum = 0;
739 sprintf(savename,"scrn%04d.tga",savenum++);
741 sprintf( message, "%s '%s'", TXT_DUMPING_SCREEN, savename );
742 //end this section addition/change - Victor Rachels
745 // save_font = grd_curcanv->cv_font;
746 // gr_set_curfont(GAME_FONT);
747 // gr_set_fontcolor(gr_find_closest_color_current(0,31,0),-1);
748 // gr_get_string_size(message,&w,&h,&aw);
749 // modex_print_message(32, 2, message);
751 hud_message(MSGC_GAME_FEEDBACK,message);
754 buf = d_malloc(grd_curscreen->sc_w*grd_curscreen->sc_h*3);
755 glReadBuffer(GL_FRONT);
756 glReadPixels(0,0,grd_curscreen->sc_w,grd_curscreen->sc_h,GL_RGB,GL_UNSIGNED_BYTE,buf);
757 write_bmp(savename,grd_curscreen->sc_w,grd_curscreen->sc_h,buf);