1 /* $Id: gr.c,v 1.21 2004-05-20 02:04:26 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 gl_vendor=glGetString(GL_VENDOR);
166 gl_renderer=glGetString(GL_RENDERER);
167 gl_version=glGetString(GL_VERSION);
168 gl_extensions=glGetString(GL_EXTENSIONS);
170 con_printf(CON_VERBOSE, "gl vendor:%s renderer:%s version:%s extensions:%s\n",gl_vendor,gl_renderer,gl_version,gl_extensions);
172 ogl_intensity4_ok = 1;
173 ogl_luminance4_alpha4_ok = 1;
175 ogl_gettexlevelparam_ok = 1;
176 ogl_setgammaramp_ok = 1;
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");
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));
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));
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..
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)
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]);
214 #ifdef GL_SGIS_multitexture
215 if ((t=FindArg("-gl_sgis_multitexture_ok"))){
216 ogl_sgis_multitexture_ok=atoi(Args[t+1]);
219 if ((t=FindArg("-gl_intensity4_ok"))){
220 ogl_intensity4_ok=atoi(Args[t+1]);
222 if ((t=FindArg("-gl_luminance4_alpha4_ok"))){
223 ogl_luminance4_alpha4_ok=atoi(Args[t+1]);
225 if ((t=FindArg("-gl_rgba2_ok"))){
226 ogl_rgba2_ok=atoi(Args[t+1]);
228 if ((t=FindArg("-gl_readpixels_ok"))){
229 ogl_readpixels_ok=atoi(Args[t+1]);
231 if ((t=FindArg("-gl_gettexlevelparam_ok"))){
232 ogl_gettexlevelparam_ok=atoi(Args[t+1]);
234 if ((t=FindArg("-gl_setgammaramp_ok")))
236 ogl_setgammaramp_ok = atoi(Args[t + 1]);
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);
244 int gr_check_mode(u_int32_t mode)
250 return ogl_check_mode(w, h); // platform specific code
254 extern int VGA_current_mode; // DPH: kludge - remove at all costs
256 int gr_set_mode(u_int32_t mode)
270 VGA_current_mode = mode;
272 //if (screen != NULL) gr_palette_clear();
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();
295 ogl_init_window(w,h);//platform specific code
299 OGL_VIEWPORT(0,0,w,h);
301 ogl_set_screen_mode();
303 // gamefont_choose_game_font(w,h);
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);
318 Error("unknown/invalid texture filter %s\n",a);
319 // return GL_NEAREST;
321 int ogl_testneedmipmaps(int i){
326 case GL_NEAREST_MIPMAP_NEAREST:
327 case GL_NEAREST_MIPMAP_LINEAR:
328 case GL_LINEAR_MIPMAP_NEAREST:
329 case GL_LINEAR_MIPMAP_LINEAR:
332 Error("unknown texture filter %x\n",i);
335 #ifdef OGL_RUNTIME_LOAD
337 char *OglLibPath="opengl32.dll";
340 char *OglLibPath="libGL.so";
344 int ogl_init_load_library(void)
349 if ((t=FindArg("-gl_library")))
350 OglLibPath=Args[t+1];
352 retcode = OpenGL_LoadLibrary(true);
355 mprintf((0,"Opengl loaded ok\n"));
359 Error("Opengl: Functions not imported\n");
362 Error("Opengl: error loading %s\n",OglLibPath);
372 int mode = SM(640,480);
373 int retcode, t, glt = 0;
375 // Only do this function once!
380 #ifdef OGL_RUNTIME_LOAD
381 ogl_init_load_library();
384 #ifdef GR_SUPPORTS_FULLSCREEN_TOGGLE
385 if (FindArg("-gl_voodoo")){
387 gr_toggle_fullscreen();
389 if (FindArg("-fullscreen"))
390 gr_toggle_fullscreen();
392 if ((glt=FindArg("-gl_alttexmerge")))
394 if ((t=FindArg("-gl_stdtexmerge")))
395 if (t>=glt)//allow overriding of earlier args
398 if ((glt=FindArg("-gl_16bittextures")))
399 ogl_rgba_format=GL_RGB5_A1;
401 if ((glt=FindArg("-gl_mipmap"))){
402 GL_texmagfilt=GL_LINEAR;
403 GL_texminfilt=GL_LINEAR_MIPMAP_NEAREST;
405 if ((glt=FindArg("-gl_trilinear")))
407 GL_texmagfilt = GL_LINEAR;
408 GL_texminfilt = GL_LINEAR_MIPMAP_LINEAR;
410 if ((t=FindArg("-gl_simple"))){
411 if (t>=glt){//allow overriding of earlier args
413 GL_texmagfilt=GL_NEAREST;
414 GL_texminfilt=GL_NEAREST;
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);
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);
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));
428 if ((t=FindArg("-gl_vidmem"))){
429 ogl_mem_target=atoi(Args[t+1])*1024*1024;
431 if ((t=FindArg("-gl_reticle"))){
432 gl_reticle=atoi(Args[t+1]);
434 //printf("ogl_mem_target=%i\n",ogl_mem_target);
436 ogl_init();//platform specific initialization
438 ogl_init_texture_list_internal();
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;
445 if ((retcode=gr_set_mode(mode)))
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 );
466 // mprintf((0,"ogl init: %s %s %s - %s\n",glGetString(GL_VENDOR),glGetString(GL_RENDERER),glGetString(GL_VERSION),glGetString,(GL_EXTENSIONS)));
468 ogl_close();//platform specific code
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);
474 #ifdef OGL_RUNTIME_LOAD
476 OpenGL_LoadLibrary(false);
479 extern int r_upixelc;
480 void ogl_upixelc(int x, int y, int c){
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;
486 OGL_DISABLE(TEXTURE_2D);
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));
498 void ogl_urect(int left,int top,int right,int bot){
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;
507 OGL_DISABLE(TEXTURE_2D);
508 glColor3f(CPAL2Tr(c),CPAL2Tg(c),CPAL2Tb(c));
516 void ogl_ulinec(int left,int top,int right,int bot,int c){
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;
524 OGL_DISABLE(TEXTURE_2D);
525 glColor3f(CPAL2Tr(c),CPAL2Tg(c),CPAL2Tb(c));
533 GLfloat last_r=0, last_g=0, last_b=0;
535 void ogl_do_palfx(void){
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);*/
545 //glBlendFunc(GL_SRC_COLOR, GL_DST_COLOR);
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;
563 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
566 void gr_palette_clear()
568 gr_palette_faded_out=1;
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;
577 void gr_palette_step_up(int r, int g, int b)
579 if (gr_palette_faded_out)
582 old_b_r = ogl_brightness_r;
583 old_b_g = ogl_brightness_g;
584 old_b_b = ogl_brightness_b;
586 ogl_brightness_r = r + gr_palette_gamma;
587 ogl_brightness_g = g + gr_palette_gamma;
588 ogl_brightness_b = b + gr_palette_gamma;
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();
596 if (!ogl_setgammaramp_ok || !ogl_brightness_ok)
598 last_r = ogl_brightness_r / 63.0;
599 last_g = ogl_brightness_g / 63.0;
600 last_b = ogl_brightness_b / 63.0;
602 do_pal_step = (r || g || b || gr_palette_gamma);
610 //added on 980913 by adb to fix palette problems
611 // need a min without side effects...
613 static inline int min(int x, int y) { return x < y ? x : y; }
616 void gr_palette_load( ubyte *pal )
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;
624 //palette = screen->format->palette;
626 gr_palette_faded_out=0;
628 gr_palette_step_up(0, 0, 0); // make ogl_setbrightness_internal get run so that menus get brightened too.
630 init_computed_colors();
635 int gr_palette_fade_out(ubyte *pal, int nsteps, int allow_keys)
637 gr_palette_faded_out=1;
643 int gr_palette_fade_in(ubyte *pal, int nsteps, int allow_keys)
645 gr_palette_faded_out=0;
651 void gr_palette_read(ubyte * pal)
654 for (i=0; i<768; i++ ) {
655 pal[i]=gr_current_pal[i];
656 if (pal[i] > 63) pal[i] = 63;
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){
665 f=open(savename,O_CREAT|O_EXCL|O_WRONLY,S_IREAD|S_IWRITE);
667 f=open(savename,O_CREAT|O_EXCL|O_WRONLY,S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH);
670 GLubyte targaMagic[12] = { 0, //no identification field
672 2,//RGB image (well, BGR, actually)
673 0, 0, 0, 0, 0, 0, 0, 0, 0 };//no colormap or image origin stuff.
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
689 for (y=0;y<h;y++){//TGAs use BGR ordering of data.
701 mprintf((0,"screenshot error, couldn't write to %s (err %i)\n",savename,errno));
708 mprintf((0,"screenshot error, couldn't open %s (err %i)\n",savename,errno));
711 void save_screen_shot(int automap_flag)
715 static int savenum=0;
719 if (!ogl_readpixels_ok){
721 hud_message(MSGC_GAME_FEEDBACK,"glReadPixels not supported on your configuration");
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++);
731 while(!access(savename,0))
733 if ( savenum == 9999 ) savenum = 0;
734 sprintf(savename,"scrn%04d.tga",savenum++);
736 sprintf( message, "%s '%s'", TXT_DUMPING_SCREEN, savename );
737 //end this section addition/change - Victor Rachels
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);
746 hud_message(MSGC_GAME_FEEDBACK,message);
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);