1 /* $Id: gr.c,v 1.15 2003-11-27 00:21:04 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;ogl_luminance4_alpha4_ok=1;ogl_rgba2_ok=1;ogl_gettexlevelparam_ok=1;
174 #if 0 //WGL only, I think
175 dglMultiTexCoord2fARB = (glMultiTexCoord2fARB_fp)wglGetProcAddress("glMultiTexCoord2fARB");
176 dglActiveTextureARB = (glActiveTextureARB_fp)wglGetProcAddress("glActiveTextureARB");
177 dglMultiTexCoord2fSGIS = (glMultiTexCoord2fSGIS_fp)wglGetProcAddress("glMultiTexCoord2fSGIS");
178 dglSelectTextureSGIS = (glSelectTextureSGIS_fp)wglGetProcAddress("glSelectTextureSGIS");
181 //multitexturing doesn't work yet.
182 #ifdef GL_ARB_multitexture
183 ogl_arb_multitexture_ok=0;//(strstr(gl_extensions,"GL_ARB_multitexture")!=0 && glActiveTextureARB!=0 && 0);
184 mprintf((0,"c:%p d:%p e:%p\n",strstr(gl_extensions,"GL_ARB_multitexture"),glActiveTextureARB,glBegin));
186 #ifdef GL_SGIS_multitexture
187 ogl_sgis_multitexture_ok=0;//(strstr(gl_extensions,"GL_SGIS_multitexture")!=0 && glSelectTextureSGIS!=0 && 0);
188 mprintf((0,"a:%p b:%p\n",strstr(gl_extensions,"GL_SGIS_multitexture"),glSelectTextureSGIS));
191 //add driver specific hacks here. whee.
192 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){
193 ogl_intensity4_ok=0;//ignores alpha, always black background instead of transparent.
194 ogl_readpixels_ok=0;//either just returns all black, or kills the X server entirely
195 ogl_gettexlevelparam_ok=0;//returns random data..
197 if (stricmp(gl_vendor,"Matrox Graphics Inc.")==0){
198 //displays garbage. reported by
199 // redomen@crcwnet.com (render="Matrox G400" version="1.1.3 5.52.015")
200 // orulz (Matrox G200)
204 //allow overriding of stuff.
205 #ifdef GL_ARB_multitexture
206 if ((t=FindArg("-gl_arb_multitexture_ok"))){
207 ogl_arb_multitexture_ok=atoi(Args[t+1]);
210 #ifdef GL_SGIS_multitexture
211 if ((t=FindArg("-gl_sgis_multitexture_ok"))){
212 ogl_sgis_multitexture_ok=atoi(Args[t+1]);
215 if ((t=FindArg("-gl_intensity4_ok"))){
216 ogl_intensity4_ok=atoi(Args[t+1]);
218 if ((t=FindArg("-gl_luminance4_alpha4_ok"))){
219 ogl_luminance4_alpha4_ok=atoi(Args[t+1]);
221 if ((t=FindArg("-gl_rgba2_ok"))){
222 ogl_rgba2_ok=atoi(Args[t+1]);
224 if ((t=FindArg("-gl_readpixels_ok"))){
225 ogl_readpixels_ok=atoi(Args[t+1]);
227 if ((t=FindArg("-gl_gettexlevelparam_ok"))){
228 ogl_gettexlevelparam_ok=atoi(Args[t+1]);
231 con_printf(CON_VERBOSE, "gl_arb_multitexture:%i gl_sgis_multitexture:%i\n",ogl_arb_multitexture_ok,ogl_sgis_multitexture_ok);
232 con_printf(CON_VERBOSE, "gl_intensity4:%i gl_luminance4_alpha4:%i gl_rgba2:%i gl_readpixels:%i gl_gettexlevelparam:%i\n",ogl_intensity4_ok,ogl_luminance4_alpha4_ok,ogl_rgba2_ok,ogl_readpixels_ok,ogl_gettexlevelparam_ok);
235 extern int VGA_current_mode; // DPH: kludge - remove at all costs
237 int gr_set_mode(u_int32_t mode)
251 VGA_current_mode = mode;
253 //if (screen != NULL) gr_palette_clear();
257 gr_bm_data=grd_curscreen->sc_canvas.cv_bitmap.bm_data;//since we use realloc, we want to keep this pointer around.
258 memset( grd_curscreen, 0, sizeof(grs_screen));
259 grd_curscreen->sc_mode = mode;
260 grd_curscreen->sc_w = w;
261 grd_curscreen->sc_h = h;
262 grd_curscreen->sc_aspect = fixdiv(grd_curscreen->sc_w*3,grd_curscreen->sc_h*4);
263 grd_curscreen->sc_canvas.cv_bitmap.bm_x = 0;
264 grd_curscreen->sc_canvas.cv_bitmap.bm_y = 0;
265 grd_curscreen->sc_canvas.cv_bitmap.bm_w = w;
266 grd_curscreen->sc_canvas.cv_bitmap.bm_h = h;
267 //grd_curscreen->sc_canvas.cv_bitmap.bm_rowsize = screen->pitch;
268 grd_curscreen->sc_canvas.cv_bitmap.bm_rowsize = w;
269 grd_curscreen->sc_canvas.cv_bitmap.bm_type = BM_OGL;
270 //grd_curscreen->sc_canvas.cv_bitmap.bm_data = (unsigned char *)screen->pixels;
271 // mprintf((0,"ogl/gr.c: reallocing %p to %i\n",grd_curscreen->sc_canvas.cv_bitmap.bm_data,w*h));
272 grd_curscreen->sc_canvas.cv_bitmap.bm_data = d_realloc(gr_bm_data,w*h);
273 gr_set_current_canvas(NULL);
274 //gr_enable_default_palette_loading();
276 ogl_init_window(w,h);//platform specific code
280 OGL_VIEWPORT(0,0,w,h);
282 ogl_set_screen_mode();
284 // gamefont_choose_game_font(w,h);
289 #define GLstrcmptestr(a,b) if (stricmp(a,#b)==0 || stricmp(a,"GL_" #b)==0)return GL_ ## b;
290 int ogl_atotexfilti(char *a,int min){
291 GLstrcmptestr(a,NEAREST);
292 GLstrcmptestr(a,LINEAR);
293 if (min){//mipmaps are valid only for the min filter
294 GLstrcmptestr(a,NEAREST_MIPMAP_NEAREST);
295 GLstrcmptestr(a,NEAREST_MIPMAP_LINEAR);
296 GLstrcmptestr(a,LINEAR_MIPMAP_NEAREST);
297 GLstrcmptestr(a,LINEAR_MIPMAP_LINEAR);
299 Error("unknown/invalid texture filter %s\n",a);
300 // return GL_NEAREST;
302 int ogl_testneedmipmaps(int i){
307 case GL_NEAREST_MIPMAP_NEAREST:
308 case GL_NEAREST_MIPMAP_LINEAR:
309 case GL_LINEAR_MIPMAP_NEAREST:
310 case GL_LINEAR_MIPMAP_LINEAR:
313 Error("unknown texture filter %x\n",i);
316 #ifdef OGL_RUNTIME_LOAD
318 char *OglLibPath="opengl32.dll";
321 char *OglLibPath="libGL.so";
325 int ogl_init_load_library(void)
330 if ((t=FindArg("-gl_library")))
331 OglLibPath=Args[t+1];
333 retcode = OpenGL_LoadLibrary(true);
336 mprintf((0,"Opengl loaded ok\n"));
340 Error("Opengl: Functions not imported\n");
343 Error("Opengl: error loading %s\n",OglLibPath);
353 int mode = SM(640,480);
354 int retcode, t, glt = 0;
356 // Only do this function once!
361 #ifdef OGL_RUNTIME_LOAD
362 ogl_init_load_library();
365 #ifdef GR_SUPPORTS_FULLSCREEN_TOGGLE
366 if (FindArg("-gl_voodoo")){
368 gr_toggle_fullscreen();
370 if (FindArg("-fullscreen"))
371 gr_toggle_fullscreen();
373 if ((glt=FindArg("-gl_alttexmerge")))
375 if ((t=FindArg("-gl_stdtexmerge")))
376 if (t>=glt)//allow overriding of earlier args
379 if ((glt=FindArg("-gl_16bittextures")))
380 ogl_rgba_format=GL_RGB5_A1;
382 if ((glt=FindArg("-gl_mipmap"))){
383 GL_texmagfilt=GL_LINEAR;
384 GL_texminfilt=GL_LINEAR_MIPMAP_NEAREST;
386 if ((t=FindArg("-gl_simple"))){
387 if (t>=glt){//allow overriding of earlier args
389 GL_texmagfilt=GL_NEAREST;
390 GL_texminfilt=GL_NEAREST;
393 if ((t=FindArg("-gl_texmagfilt")) || (t=FindArg("-gl_texmagfilter"))){
394 if (t>=glt)//allow overriding of earlier args
395 GL_texmagfilt=ogl_atotexfilti(Args[t+1],0);
397 if ((t=FindArg("-gl_texminfilt")) || (t=FindArg("-gl_texminfilter"))){
398 if (t>=glt)//allow overriding of earlier args
399 GL_texminfilt=ogl_atotexfilti(Args[t+1],1);
401 GL_needmipmaps=ogl_testneedmipmaps(GL_texminfilt);
402 mprintf((0,"gr_init: texmagfilt:%x texminfilt:%x needmipmaps=%i\n",GL_texmagfilt,GL_texminfilt,GL_needmipmaps));
404 if ((t=FindArg("-gl_vidmem"))){
405 ogl_mem_target=atoi(Args[t+1])*1024*1024;
407 if ((t=FindArg("-gl_reticle"))){
408 gl_reticle=atoi(Args[t+1]);
410 //printf("ogl_mem_target=%i\n",ogl_mem_target);
412 ogl_init();//platform specific initialization
414 ogl_init_texture_list_internal();
416 MALLOC( grd_curscreen,grs_screen,1 );
417 memset( grd_curscreen, 0, sizeof(grs_screen));
418 grd_curscreen->sc_canvas.cv_bitmap.bm_data = NULL;
421 if ((retcode=gr_set_mode(mode)))
426 grd_curscreen->sc_canvas.cv_color = 0;
427 grd_curscreen->sc_canvas.cv_drawmode = 0;
428 grd_curscreen->sc_canvas.cv_font = NULL;
429 grd_curscreen->sc_canvas.cv_font_fg_color = 0;
430 grd_curscreen->sc_canvas.cv_font_bg_color = 0;
431 gr_set_current_canvas( &grd_curscreen->sc_canvas );
442 // mprintf((0,"ogl init: %s %s %s - %s\n",glGetString(GL_VENDOR),glGetString(GL_RENDERER),glGetString(GL_VERSION),glGetString,(GL_EXTENSIONS)));
444 ogl_close();//platform specific code
446 if (grd_curscreen->sc_canvas.cv_bitmap.bm_data)
447 d_free(grd_curscreen->sc_canvas.cv_bitmap.bm_data);
448 d_free(grd_curscreen);
450 #ifdef OGL_RUNTIME_LOAD
452 OpenGL_LoadLibrary(false);
455 extern int r_upixelc;
456 void ogl_upixelc(int x, int y, int c){
458 // printf("gr_upixelc(%i,%i,%i)%i\n",x,y,c,Function_mode==FMODE_GAME);
459 // if(Function_mode != FMODE_GAME){
460 // grd_curcanv->cv_bitmap.bm_data[y*grd_curscreen->sc_canvas.cv_bitmap.bm_w+x]=c;
462 OGL_DISABLE(TEXTURE_2D);
465 // glBegin(GL_LINES);
466 // ogl_pal=gr_current_pal;
467 glColor3f(CPAL2Tr(c),CPAL2Tg(c),CPAL2Tb(c));
468 // ogl_pal=gr_palette;
469 glVertex2f((x+grd_curcanv->cv_bitmap.bm_x)/(float)last_width,1.0-(y+grd_curcanv->cv_bitmap.bm_y)/(float)last_height);
470 // glVertex2f(x/((float)last_width+1),1.0-y/((float)last_height+1));
474 void ogl_urect(int left,int top,int right,int bot){
478 xo=(left+grd_curcanv->cv_bitmap.bm_x)/(float)last_width;
479 xf=(right+grd_curcanv->cv_bitmap.bm_x)/(float)last_width;
480 yo=1.0-(top+grd_curcanv->cv_bitmap.bm_y)/(float)last_height;
481 yf=1.0-(bot+grd_curcanv->cv_bitmap.bm_y)/(float)last_height;
483 OGL_DISABLE(TEXTURE_2D);
484 glColor3f(CPAL2Tr(c),CPAL2Tg(c),CPAL2Tb(c));
492 void ogl_ulinec(int left,int top,int right,int bot,int c){
495 xo=(left+grd_curcanv->cv_bitmap.bm_x)/(float)last_width;
496 xf=(right+grd_curcanv->cv_bitmap.bm_x)/(float)last_width;
497 yo=1.0-(top+grd_curcanv->cv_bitmap.bm_y)/(float)last_height;
498 yf=1.0-(bot+grd_curcanv->cv_bitmap.bm_y)/(float)last_height;
500 OGL_DISABLE(TEXTURE_2D);
501 glColor3f(CPAL2Tr(c),CPAL2Tg(c),CPAL2Tb(c));
509 GLfloat last_r=0, last_g=0, last_b=0;
511 void ogl_do_palfx(void){
513 OGL_DISABLE(TEXTURE_2D);
514 if (gr_palette_faded_out){
515 /* glEnable(GL_BLEND);
516 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);*/
521 //glBlendFunc(GL_SRC_COLOR, GL_DST_COLOR);
523 glBlendFunc(GL_ONE,GL_ONE);
524 glColor3f(last_r,last_g,last_b);
525 // r=f2fl(last_r);g=f2fl(last_g);b=f2fl(last_b);a=0.5;
539 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
542 void gr_palette_clear()
544 gr_palette_faded_out=1;
548 void gr_palette_step_up( int r, int g, int b )
550 if (gr_palette_faded_out) return;
552 // if ( (r==last_r) && (g==last_g) && (b==last_b) ) return;
557 do_pal_step=(r || g || b);*/
559 last_r = (r+gr_palette_gamma)/63.0;
560 last_g = (g+gr_palette_gamma)/63.0;
561 last_b = (b+gr_palette_gamma)/63.0;
563 do_pal_step=(r || g || b || gr_palette_gamma);
567 //added on 980913 by adb to fix palette problems
568 // need a min without side effects...
570 static inline int min(int x, int y) { return x < y ? x : y; }
573 void gr_palette_load( ubyte *pal )
577 for (i=0; i<768; i++ ) {
578 gr_current_pal[i] = pal[i];
579 if (gr_current_pal[i] > 63) gr_current_pal[i] = 63;
581 //palette = screen->format->palette;
583 gr_palette_faded_out=0;
585 init_computed_colors();
590 int gr_palette_fade_out(ubyte *pal, int nsteps, int allow_keys)
592 gr_palette_faded_out=1;
598 int gr_palette_fade_in(ubyte *pal, int nsteps, int allow_keys)
600 gr_palette_faded_out=0;
606 void gr_palette_read(ubyte * pal)
609 for (i=0; i<768; i++ ) {
610 pal[i]=gr_current_pal[i];
611 if (pal[i] > 63) pal[i] = 63;
615 //writes out an uncompressed RGB .tga file
616 //if we got really spiffy, we could optionally link in libpng or something, and use that.
617 void write_bmp(char *savename,int w,int h,unsigned char *buf){
620 f=open(savename,O_CREAT|O_EXCL|O_WRONLY,S_IREAD|S_IWRITE);
622 f=open(savename,O_CREAT|O_EXCL|O_WRONLY,S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH);
625 GLubyte targaMagic[12] = { 0, //no identification field
627 2,//RGB image (well, BGR, actually)
628 0, 0, 0, 0, 0, 0, 0, 0, 0 };//no colormap or image origin stuff.
635 write (f,targaMagic,sizeof(targaMagic));
636 blah=w%256;write (f,&blah,1);//w, low
637 blah=w/256;write (f,&blah,1);//w, high
638 blah=h%256;write (f,&blah,1);//h, low
639 blah=h/256;write (f,&blah,1);//h, high
640 blah=24;write (f,&blah,1);//24 bpp
641 blah=0;write (f,&blah,1);//no attribute bits, origin is lowerleft, no interleave
644 for (y=0;y<h;y++){//TGAs use BGR ordering of data.
656 mprintf((0,"screenshot error, couldn't write to %s (err %i)\n",savename,errno));
663 mprintf((0,"screenshot error, couldn't open %s (err %i)\n",savename,errno));
666 void save_screen_shot(int automap_flag)
670 static int savenum=0;
674 if (!ogl_readpixels_ok){
676 hud_message(MSGC_GAME_FEEDBACK,"glReadPixels not supported on your configuration");
682 //added/changed on 10/31/98 by Victor Rachels to fix overwrite each new game
683 if ( savenum == 9999 ) savenum = 0;
684 sprintf(savename,"scrn%04d.tga",savenum++);
686 while(!access(savename,0))
688 if ( savenum == 9999 ) savenum = 0;
689 sprintf(savename,"scrn%04d.tga",savenum++);
691 sprintf( message, "%s '%s'", TXT_DUMPING_SCREEN, savename );
692 //end this section addition/change - Victor Rachels
695 // save_font = grd_curcanv->cv_font;
696 // gr_set_curfont(GAME_FONT);
697 // gr_set_fontcolor(gr_find_closest_color_current(0,31,0),-1);
698 // gr_get_string_size(message,&w,&h,&aw);
699 // modex_print_message(32, 2, message);
701 hud_message(MSGC_GAME_FEEDBACK,message);
704 buf = d_malloc(grd_curscreen->sc_w*grd_curscreen->sc_h*3);
705 glReadBuffer(GL_FRONT);
706 glReadPixels(0,0,grd_curscreen->sc_w,grd_curscreen->sc_h,GL_RGB,GL_UNSIGNED_BYTE,buf);
707 write_bmp(savename,grd_curscreen->sc_w,grd_curscreen->sc_h,buf);