3 * OGL video functions. - Added 9/15/99 Matthew Mueller
19 #if !defined(_MSC_VER) && !defined(macintosh)
22 #if !defined(macintosh)
23 #include <sys/types.h>
51 #if defined(__APPLE__) && defined(__MACH__)
52 #include <OpenGL/glu.h>
53 #undef GL_ARB_multitexture // hack!
63 void gr_palette_clear(); // Function prototype for gr_init;
69 int gr_check_fullscreen(void){
70 return ogl_fullscreen;
73 void gr_do_fullscreen(int f){
75 ogl_fullscreen=1;//force fullscreen mode on voodoos.
79 ogl_do_fullscreen_internal();
83 int gr_toggle_fullscreen(void){
84 gr_do_fullscreen(!ogl_fullscreen);
85 // grd_curscreen->sc_mode=0;//hack to get it to reset screen mode
86 return ogl_fullscreen;
89 int arch_toggle_fullscreen_menu(void){
90 unsigned char *buf=NULL;
92 if (ogl_readpixels_ok){
93 MALLOC(buf,unsigned char,grd_curscreen->sc_w*grd_curscreen->sc_h*3);
94 glReadBuffer(GL_FRONT);
95 glReadPixels(0,0,grd_curscreen->sc_w,grd_curscreen->sc_h,GL_RGB,GL_UNSIGNED_BYTE,buf);
98 gr_do_fullscreen(!ogl_fullscreen);
100 if (ogl_readpixels_ok){
101 // glWritePixels(0,0,grd_curscreen->sc_w,grd_curscreen->sc_h,GL_RGB,GL_UNSIGNED_BYTE,buf);
103 glDrawPixels(grd_curscreen->sc_w,grd_curscreen->sc_h,GL_RGB,GL_UNSIGNED_BYTE,buf);
106 // grd_curscreen->sc_mode=0;//hack to get it to reset screen mode
108 return ogl_fullscreen;
111 void ogl_init_state(void){
112 /* select clearing (background) color */
113 glClearColor(0.0, 0.0, 0.0, 0.0);
114 glShadeModel(GL_SMOOTH);
116 /* initialize viewing values */
117 glMatrixMode(GL_PROJECTION);
119 glOrtho(0.0, 1.0, 0.0, 1.0, -1.0, 1.0);
120 glScalef(1.0, -1.0, 1.0);
121 glTranslatef(0.0, -1.0, 0.0);
122 gr_palette_step_up(0,0,0);//in case its left over from in game
125 int last_screen_mode=-1;
127 void ogl_set_screen_mode(void){
128 if (last_screen_mode==Screen_mode)
130 OGL_VIEWPORT(0,0,grd_curscreen->sc_w,grd_curscreen->sc_h);
131 // 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);
132 if (Screen_mode==SCREEN_GAME){
133 glDrawBuffer(GL_BACK);
135 glClearColor(0.0, 0.0, 0.0, 0.0);
136 glDrawBuffer(GL_FRONT);
137 glClear(GL_COLOR_BUFFER_BIT);
138 glMatrixMode(GL_PROJECTION);
139 glLoadIdentity();//clear matrix
140 glOrtho(0.0, 1.0, 0.0, 1.0, -1.0, 1.0);
141 glMatrixMode(GL_MODELVIEW);
142 glLoadIdentity();//clear matrix
144 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
146 last_screen_mode=Screen_mode;
153 if(Screen_mode != SCREEN_GAME){
159 const char *gl_vendor, *gl_renderer, *gl_version, *gl_extensions;
161 void ogl_get_verinfo(void)
163 long t, sgi_max_textures = -1;
164 GLint arb_max_textures = -1;
165 #ifdef GL_NV_register_combiners
166 long nv_register_combiners = -1;
168 float anisotropic_max = 0;
170 gl_vendor = (const char *) glGetString (GL_VENDOR);
171 gl_renderer = (const char *) glGetString (GL_RENDERER);
172 gl_version = (const char *) glGetString (GL_VERSION);
173 gl_extensions = (const char *) glGetString (GL_EXTENSIONS);
175 con_printf(CON_VERBOSE, "OpenGL: vendor: %s\nOpenGL: renderer: %s\nOpenGL: version: %s\n",gl_vendor,gl_renderer,gl_version);
177 ogl_intensity4_ok = 1;
178 ogl_luminance4_alpha4_ok = 1;
180 ogl_gettexlevelparam_ok = 1;
181 ogl_setgammaramp_ok = 1;
184 dglMultiTexCoord2fARB = (glMultiTexCoord2fARB_fp)wglGetProcAddress("glMultiTexCoord2fARB");
185 dglActiveTextureARB = (glActiveTextureARB_fp)wglGetProcAddress("glActiveTextureARB");
186 dglMultiTexCoord2fSGIS = (glMultiTexCoord2fSGIS_fp)wglGetProcAddress("glMultiTexCoord2fSGIS");
187 dglSelectTextureSGIS = (glSelectTextureSGIS_fp)wglGetProcAddress("glSelectTextureSGIS");
188 dglColorTableEXT = (glColorTableEXT_fp)wglGetProcAddress("glColorTableEXT");
189 dglCombinerParameteriNV = (glCombinerParameteriNV_fp)wglGetProcAddress("glCombinerParameteriNV");
190 dglCombinerInputNV = (glCombinerInputNV_fp)wglGetProcAddress("glCombinerInputNV");
191 dglCombinerOutputNV = (glCombinerOutputNV_fp)wglGetProcAddress("glCombinerOutputNV");
192 dglFinalCombinerInputNV = (glFinalCombinerInputNV_fp)wglGetProcAddress("glFinalCombinerInputNV");
195 #ifdef GL_ARB_multitexture
196 ogl_arb_multitexture_ok = (strstr(gl_extensions, "GL_ARB_multitexture") != 0 && glActiveTextureARB != 0);
197 mprintf((0,"c:%p d:%p e:%p\n",strstr(gl_extensions,"GL_ARB_multitexture"),glActiveTextureARB,glBegin));
199 #ifdef GL_SGIS_multitexture
200 ogl_sgis_multitexture_ok = (strstr(gl_extensions, "GL_SGIS_multitexture") != 0 && glSelectTextureSGIS != 0);
201 mprintf((0,"a:%p b:%p\n",strstr(gl_extensions,"GL_SGIS_multitexture"),glSelectTextureSGIS));
203 ogl_nv_texture_env_combine4_ok = (strstr(gl_extensions, "GL_NV_texture_env_combine4") != 0);
204 #ifdef GL_NV_register_combiners
205 ogl_nv_register_combiners_ok=(strstr(gl_extensions,"GL_NV_register_combiners")!=0 && glCombinerOutputNV!=0);
208 ogl_ext_texture_filter_anisotropic_ok = (strstr(gl_extensions, "GL_EXT_texture_filter_anisotropic") != 0);
209 if (ogl_ext_texture_filter_anisotropic_ok)
210 glGetFloatv(GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT, &anisotropic_max);
212 #ifdef GL_EXT_paletted_texture
213 ogl_paletted_texture_ok = (strstr(gl_extensions, "GL_EXT_paletted_texture") != 0 && glColorTableEXT != 0);
214 ogl_shared_palette_ok = (strstr(gl_extensions, "GL_EXT_shared_texture_palette") != 0 && ogl_paletted_texture_ok);
216 //add driver specific hacks here. whee.
217 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){
218 ogl_intensity4_ok=0;//ignores alpha, always black background instead of transparent.
219 ogl_readpixels_ok=0;//either just returns all black, or kills the X server entirely
220 ogl_gettexlevelparam_ok=0;//returns random data..
222 if (stricmp(gl_vendor,"Matrox Graphics Inc.")==0){
223 //displays garbage. reported by
224 // redomen@crcwnet.com (render="Matrox G400" version="1.1.3 5.52.015")
225 // orulz (Matrox G200)
229 if (stricmp(gl_renderer,"3dfx Voodoo 3")==0){ // strangely, includes Voodoo 2
230 ogl_gettexlevelparam_ok=0; // Always returns 0
234 //allow overriding of stuff.
235 #ifdef GL_ARB_multitexture
236 if ((t=FindArg("-gl_arb_multitexture_ok"))){
237 ogl_arb_multitexture_ok=atoi(Args[t+1]);
239 if (ogl_arb_multitexture_ok)
240 glGetIntegerv(GL_MAX_TEXTURE_UNITS_ARB, &arb_max_textures);
242 #ifdef GL_SGIS_multitexture
243 if ((t=FindArg("-gl_sgis_multitexture_ok"))){
244 ogl_sgis_multitexture_ok=atoi(Args[t+1]);
246 if (ogl_sgis_multitexture_ok)
247 glGetIntegerv(GL_MAX_TEXTURES_SGIS, &sgi_max_textures);
249 #ifdef GL_NV_register_combiners
250 if ((t = FindArg("-gl_nv_register_combiners_ok")))
252 ogl_nv_register_combiners_ok=atoi(Args[t + 1]);
254 if (ogl_nv_register_combiners_ok)
255 glGetIntegerv(GL_MAX_GENERAL_COMBINERS_NV, &nv_register_combiners);
257 #ifdef GL_EXT_paletted_texture
258 if ((t = FindArg("-gl_paletted_texture_ok")))
260 ogl_paletted_texture_ok = atoi(Args[t + 1]);
262 if ((t = FindArg("-gl_shared_palette_ok")))
264 ogl_shared_palette_ok = atoi(Args[t + 1]);
266 ogl_shared_palette_ok = ogl_shared_palette_ok && ogl_paletted_texture_ok; // shared palettes require palette support in the first place, obviously ;)
267 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);
269 if ((t=FindArg("-gl_intensity4_ok"))){
270 ogl_intensity4_ok=atoi(Args[t+1]);
272 if ((t=FindArg("-gl_luminance4_alpha4_ok"))){
273 ogl_luminance4_alpha4_ok=atoi(Args[t+1]);
275 if ((t=FindArg("-gl_rgba2_ok"))){
276 ogl_rgba2_ok=atoi(Args[t+1]);
278 if ((t=FindArg("-gl_readpixels_ok"))){
279 ogl_readpixels_ok=atoi(Args[t+1]);
281 if ((t=FindArg("-gl_gettexlevelparam_ok"))){
282 ogl_gettexlevelparam_ok=atoi(Args[t+1]);
284 if ((t=FindArg("-gl_setgammaramp_ok")))
286 ogl_setgammaramp_ok = atoi(Args[t + 1]);
289 con_printf(CON_DEBUG, "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);
290 #ifdef GL_NV_register_combiners
291 con_printf(CON_DEBUG, "gl_nv_register_combiners:%i(%i stages)\n", ogl_nv_register_combiners_ok, nv_register_combiners);
293 con_printf(CON_DEBUG, "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);
297 int gr_check_mode(uint32_t mode)
303 return ogl_check_mode(w, h); // platform specific code
307 extern int VGA_current_mode; // DPH: kludge - remove at all costs
309 int gr_set_mode(uint32_t mode)
321 if (mode == VGA_current_mode)
326 VGA_current_mode = mode;
328 //if (screen != NULL) gr_palette_clear();
332 gr_bm_data=(char *)grd_curscreen->sc_canvas.cv_bitmap.bm_data;//since we use realloc, we want to keep this pointer around.
333 memset( grd_curscreen, 0, sizeof(grs_screen));
334 grd_curscreen->sc_mode = mode;
335 grd_curscreen->sc_w = w;
336 grd_curscreen->sc_h = h;
337 grd_curscreen->sc_aspect = fixdiv(grd_curscreen->sc_w*3,grd_curscreen->sc_h*4);
338 grd_curscreen->sc_canvas.cv_bitmap.bm_x = 0;
339 grd_curscreen->sc_canvas.cv_bitmap.bm_y = 0;
340 grd_curscreen->sc_canvas.cv_bitmap.bm_w = w;
341 grd_curscreen->sc_canvas.cv_bitmap.bm_h = h;
342 //grd_curscreen->sc_canvas.cv_bitmap.bm_rowsize = screen->pitch;
343 grd_curscreen->sc_canvas.cv_bitmap.bm_rowsize = w;
344 grd_curscreen->sc_canvas.cv_bitmap.bm_type = BM_OGL;
345 //grd_curscreen->sc_canvas.cv_bitmap.bm_data = (unsigned char *)screen->pixels;
346 // mprintf((0,"ogl/gr.c: reallocing %p to %i\n",grd_curscreen->sc_canvas.cv_bitmap.bm_data,w*h));
347 grd_curscreen->sc_canvas.cv_bitmap.bm_data = d_realloc(gr_bm_data,w*h);
348 gr_set_current_canvas(NULL);
349 //gr_enable_default_palette_loading();
351 ogl_init_window(w,h);//platform specific code
355 OGL_VIEWPORT(0,0,w,h);
357 ogl_set_screen_mode();
359 // gamefont_choose_game_font(w,h);
364 #define GLstrcmptestr(a,b) if (stricmp(a,#b)==0 || stricmp(a,"GL_" #b)==0)return GL_ ## b;
365 int ogl_atotexfilti(char *a,int min){
366 GLstrcmptestr(a,NEAREST);
367 GLstrcmptestr(a,LINEAR);
368 if (min){//mipmaps are valid only for the min filter
369 GLstrcmptestr(a,NEAREST_MIPMAP_NEAREST);
370 GLstrcmptestr(a,NEAREST_MIPMAP_LINEAR);
371 GLstrcmptestr(a,LINEAR_MIPMAP_NEAREST);
372 GLstrcmptestr(a,LINEAR_MIPMAP_LINEAR);
374 Error("unknown/invalid texture filter %s\n",a);
375 // return GL_NEAREST;
377 int ogl_testneedmipmaps(int i){
382 case GL_NEAREST_MIPMAP_NEAREST:
383 case GL_NEAREST_MIPMAP_LINEAR:
384 case GL_LINEAR_MIPMAP_NEAREST:
385 case GL_LINEAR_MIPMAP_LINEAR:
388 Error("unknown texture filter %x\n",i);
393 void gr_cmd_texturemode(int argc, char **argv)
398 if (!stricmp(argv[1], "GL_NEAREST")) {
399 GL_texminfilt = GL_NEAREST;
400 GL_texmagfilt = GL_NEAREST;
401 } else if (!stricmp(argv[1], "GL_LINEAR")) {
402 GL_texminfilt = GL_LINEAR;
403 GL_texmagfilt = GL_LINEAR;
404 } else if (!stricmp(argv[1], "GL_NEAREST_MIPMAP_NEAREST")) {
405 GL_texminfilt = GL_NEAREST_MIPMAP_NEAREST;
406 GL_texmagfilt = GL_NEAREST;
407 } else if (!stricmp(argv[1], "GL_LINEAR_MIPMAP_NEAREST")) {
408 GL_texminfilt = GL_LINEAR_MIPMAP_NEAREST;
409 GL_texmagfilt = GL_LINEAR;
410 } else if (!stricmp(argv[1], "GL_NEAREST_MIPMAP_LINEAR")) {
411 GL_texminfilt = GL_NEAREST_MIPMAP_LINEAR;
412 GL_texmagfilt = GL_NEAREST;
413 } else if (!stricmp(argv[1], "GL_LINEAR_MIPMAP_LINEAR")) {
414 GL_texminfilt = GL_LINEAR_MIPMAP_LINEAR;
415 GL_texmagfilt = GL_LINEAR;
419 GL_needmipmaps=ogl_testneedmipmaps(GL_texminfilt);
421 ogl_smash_texture_list_internal();
425 #ifdef OGL_RUNTIME_LOAD
427 char *OglLibPath="opengl32.dll";
430 char *OglLibPath="libGL.so";
433 char *OglLibPath = NULL;
437 int ogl_init_load_library(void)
442 if ((t=FindArg("-gl_library")))
443 OglLibPath=Args[t+1];
445 retcode = OpenGL_LoadLibrary(true);
448 mprintf((0,"Opengl loaded ok\n"));
452 Error("Opengl: Functions not imported\n");
455 Error("Opengl: error loading %s\n", OglLibPath? OglLibPath : SDL_GetError());
467 // Only do this function once!
472 #ifdef OGL_RUNTIME_LOAD
473 ogl_init_load_library();
476 #ifdef GR_SUPPORTS_FULLSCREEN_TOGGLE
477 if (FindArg("-gl_voodoo")){
479 gr_toggle_fullscreen();
481 if (FindArg("-fullscreen"))
482 gr_toggle_fullscreen();
484 if ((glt=FindArg("-gl_alttexmerge")))
486 if ((t=FindArg("-gl_stdtexmerge")))
487 if (t>=glt)//allow overriding of earlier args
490 if ((glt = FindArg("-gl_16bittextures")))
492 ogl_rgba_internalformat = GL_RGB5_A1;
493 ogl_rgb_internalformat = GL_RGB5;
496 if ((glt=FindArg("-gl_mipmap"))){
497 GL_texmagfilt=GL_LINEAR;
498 GL_texminfilt=GL_LINEAR_MIPMAP_NEAREST;
500 if ((glt=FindArg("-gl_trilinear")))
502 GL_texmagfilt = GL_LINEAR;
503 GL_texminfilt = GL_LINEAR_MIPMAP_LINEAR;
505 if ((t=FindArg("-gl_simple"))){
506 if (t>=glt){//allow overriding of earlier args
508 GL_texmagfilt=GL_NEAREST;
509 GL_texminfilt=GL_NEAREST;
512 if ((t=FindArg("-gl_texmagfilt")) || (t=FindArg("-gl_texmagfilter"))){
513 if (t>=glt)//allow overriding of earlier args
514 GL_texmagfilt=ogl_atotexfilti(Args[t+1],0);
516 if ((t=FindArg("-gl_texminfilt")) || (t=FindArg("-gl_texminfilter"))){
517 if (t>=glt)//allow overriding of earlier args
518 GL_texminfilt=ogl_atotexfilti(Args[t+1],1);
520 GL_needmipmaps=ogl_testneedmipmaps(GL_texminfilt);
522 if ((t = FindArg("-gl_anisotropy")) || (t = FindArg("-gl_anisotropic")))
524 GL_texanisofilt=atof(Args[t + 1]);
527 mprintf((0,"gr_init: texmagfilt:%x texminfilt:%x needmipmaps=%i anisotropic:%f\n",GL_texmagfilt,GL_texminfilt,GL_needmipmaps,GL_texanisofilt));
530 if ((t=FindArg("-gl_vidmem"))){
531 ogl_mem_target=atoi(Args[t+1])*1024*1024;
533 if ((t=FindArg("-gl_reticle"))){
534 gl_reticle=atoi(Args[t+1]);
536 //printf("ogl_mem_target=%i\n",ogl_mem_target);
538 ogl_init();//platform specific initialization
540 ogl_init_texture_list_internal();
542 MALLOC( grd_curscreen,grs_screen,1 );
543 memset( grd_curscreen, 0, sizeof(grs_screen));
544 grd_curscreen->sc_canvas.cv_bitmap.bm_data = NULL;
545 grd_curscreen->sc_canvas.cv_color = 0;
546 grd_curscreen->sc_canvas.cv_drawmode = 0;
547 grd_curscreen->sc_canvas.cv_font = NULL;
548 grd_curscreen->sc_canvas.cv_font_fg_color = 0;
549 grd_curscreen->sc_canvas.cv_font_bg_color = 0;
550 gr_set_current_canvas( &grd_curscreen->sc_canvas );
552 cmd_addcommand("gl_texturemode", gr_cmd_texturemode);
563 // mprintf((0,"ogl init: %s %s %s - %s\n",glGetString(GL_VENDOR),glGetString(GL_RENDERER),glGetString(GL_VERSION),glGetString,(GL_EXTENSIONS)));
564 ogl_brightness_r = ogl_brightness_g = ogl_brightness_b = 0;
565 ogl_setbrightness_internal();
567 ogl_close();//platform specific code
569 if (grd_curscreen->sc_canvas.cv_bitmap.bm_data)
570 d_free(grd_curscreen->sc_canvas.cv_bitmap.bm_data);
571 d_free(grd_curscreen);
573 #ifdef OGL_RUNTIME_LOAD
575 OpenGL_LoadLibrary(false);
578 extern int r_upixelc;
579 void ogl_upixelc(int x, int y, int c){
581 // printf("gr_upixelc(%i,%i,%i)%i\n",x,y,c,Function_mode==FMODE_GAME);
582 // if(Function_mode != FMODE_GAME){
583 // grd_curcanv->cv_bitmap.bm_data[y*grd_curscreen->sc_canvas.cv_bitmap.bm_w+x]=c;
585 OGL_DISABLE(TEXTURE_2D);
588 // glBegin(GL_LINES);
589 // ogl_pal=gr_current_pal;
590 glColor3f(CPAL2Tr(c),CPAL2Tg(c),CPAL2Tb(c));
591 // ogl_pal=gr_palette;
592 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);
593 // glVertex2f(x/((float)last_width+1),1.0-y/((float)last_height+1));
597 void ogl_urect(int left,int top,int right,int bot){
601 xo=(left+grd_curcanv->cv_bitmap.bm_x)/(float)last_width;
602 xf = (right + 1 + grd_curcanv->cv_bitmap.bm_x) / (float)last_width;
603 yo=1.0-(top+grd_curcanv->cv_bitmap.bm_y)/(float)last_height;
604 yf = 1.0 - (bot + 1 + grd_curcanv->cv_bitmap.bm_y) / (float)last_height;
606 OGL_DISABLE(TEXTURE_2D);
607 if (Gr_scanline_darkening_level >= GR_FADE_LEVELS)
608 glColor3f(CPAL2Tr(c), CPAL2Tg(c), CPAL2Tb(c));
610 glColor4f(CPAL2Tr(c), CPAL2Tg(c), CPAL2Tb(c), 1.0 - (float)Gr_scanline_darkening_level / ((float)GR_FADE_LEVELS - 1.0));
618 void ogl_ulinec(int left,int top,int right,int bot,int c){
621 xo = (left + grd_curcanv->cv_bitmap.bm_x + 0.5) / (float)last_width;
622 xf = (right + grd_curcanv->cv_bitmap.bm_x + 0.5) / (float)last_width;
623 yo = 1.0 - (top + grd_curcanv->cv_bitmap.bm_y + 0.5) / (float)last_height;
624 yf = 1.0 - (bot + grd_curcanv->cv_bitmap.bm_y + 0.5) / (float)last_height;
626 OGL_DISABLE(TEXTURE_2D);
627 glColor3f(CPAL2Tr(c),CPAL2Tg(c),CPAL2Tb(c));
635 GLfloat last_r=0, last_g=0, last_b=0;
637 void ogl_do_palfx(void){
639 OGL_DISABLE(TEXTURE_2D);
640 if (gr_palette_faded_out){
641 /* glEnable(GL_BLEND);
642 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);*/
647 //glBlendFunc(GL_SRC_COLOR, GL_DST_COLOR);
649 glBlendFunc(GL_ONE,GL_ONE);
650 glColor3f(last_r,last_g,last_b);
651 // r=f2fl(last_r);g=f2fl(last_g);b=f2fl(last_b);a=0.5;
665 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
668 void gr_palette_clear()
670 gr_palette_faded_out=1;
674 int ogl_brightness_ok = 0;
675 int ogl_setgammaramp_ok = 1;
676 int ogl_brightness_r = 0, ogl_brightness_g = 0, ogl_brightness_b = 0;
677 static int old_b_r = 0, old_b_g = 0, old_b_b = 0;
679 void gr_palette_step_up(int r, int g, int b)
681 if (gr_palette_faded_out)
684 old_b_r = ogl_brightness_r;
685 old_b_g = ogl_brightness_g;
686 old_b_b = ogl_brightness_b;
688 ogl_brightness_r = max(r + gr_palette_gamma, 0);
689 ogl_brightness_g = max(g + gr_palette_gamma, 0);
690 ogl_brightness_b = max(b + gr_palette_gamma, 0);
692 if (ogl_setgammaramp_ok &&
693 (old_b_r != ogl_brightness_r ||
694 old_b_g != ogl_brightness_g ||
695 old_b_b != ogl_brightness_b))
696 ogl_brightness_ok = !ogl_setbrightness_internal();
698 if (!ogl_setgammaramp_ok || !ogl_brightness_ok)
700 last_r = ogl_brightness_r / 63.0;
701 last_g = ogl_brightness_g / 63.0;
702 last_b = ogl_brightness_b / 63.0;
704 do_pal_step = (r || g || b || gr_palette_gamma);
713 void gr_palette_load( ubyte *pal )
717 for (i=0; i<768; i++ ) {
718 gr_current_pal[i] = pal[i];
719 if (gr_current_pal[i] > 63) gr_current_pal[i] = 63;
721 //palette = screen->format->palette;
723 gr_palette_faded_out=0;
725 gr_palette_step_up(0, 0, 0); // make ogl_setbrightness_internal get run so that menus get brightened too.
727 init_computed_colors();
729 ogl_init_shared_palette();
734 int gr_palette_fade_out(ubyte *pal, int nsteps, int allow_keys)
739 if (gr_palette_faded_out) return 0;
741 if (grd_fades_disabled || !ogl_readpixels_ok) {
742 gr_palette_faded_out = 1;
746 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
748 glDisable(GL_DEPTH_TEST);
750 MALLOC(buf, unsigned char, grd_curscreen->sc_w * grd_curscreen->sc_h * 3);
751 glReadBuffer(GL_FRONT);
752 glReadPixels(0, 0, grd_curscreen->sc_w, grd_curscreen->sc_h, GL_RGB, GL_UNSIGNED_BYTE, buf);
754 for (j = 0; j < nsteps; j++) {
756 glDrawPixels(grd_curscreen->sc_w, grd_curscreen->sc_h, GL_RGB, GL_UNSIGNED_BYTE, buf);
758 glColor4f(0.0, 0.0, 0.0, (float)(j) / (nsteps - 1)); // go from 0 to 1
768 timer_delay(f0_1 / 10);
772 gr_palette_faded_out=1;
778 int gr_palette_fade_in(ubyte *pal, int nsteps, int allow_keys)
783 if (!gr_palette_faded_out) return 0;
785 if (grd_fades_disabled || !ogl_readpixels_ok) {
786 gr_palette_faded_out = 0;
790 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
792 glDisable(GL_DEPTH_TEST);
794 MALLOC(buf, unsigned char, grd_curscreen->sc_w * grd_curscreen->sc_h * 3);
795 glReadBuffer(GL_FRONT);
796 glReadPixels(0, 0, grd_curscreen->sc_w, grd_curscreen->sc_h, GL_RGB, GL_UNSIGNED_BYTE, buf);
798 for (j = 0; j < nsteps; j++) {
800 glDrawPixels(grd_curscreen->sc_w, grd_curscreen->sc_h, GL_RGB, GL_UNSIGNED_BYTE, buf);
802 glColor4f(0.0, 0.0, 0.0, (float)(nsteps - 1 - j) / (nsteps - 1)); // go from 1 to 0
812 timer_delay(f0_1 / 10);
816 gr_palette_faded_out=0;
822 void gr_palette_read(ubyte * pal)
825 for (i=0; i<768; i++ ) {
826 pal[i]=gr_current_pal[i];
827 if (pal[i] > 63) pal[i] = 63;
831 //writes out an uncompressed RGB .tga file
832 //if we got really spiffy, we could optionally link in libpng or something, and use that.
833 void write_bmp(char *savename,int w,int h,unsigned char *buf){
836 f = PHYSFSX_openWriteBuffered(savename);
839 GLubyte targaMagic[12] = { 0, //no identification field
841 2,//RGB image (well, BGR, actually)
842 0, 0, 0, 0, 0, 0, 0, 0, 0 };//no colormap or image origin stuff.
849 PHYSFS_write(f, targaMagic, sizeof(targaMagic), 1);
850 PHYSFS_writeSLE16(f, w);
851 PHYSFS_writeSLE16(f, h);
852 PHYSFSX_writeU8(f, 24); // 24 bpp
853 PHYSFSX_writeU8(f, 0); // no attribute bits, origin is lowerleft, no interleave
856 for (y=0;y<h;y++){//TGAs use BGR ordering of data.
867 r = PHYSFS_write(f, buf + x, 1, y);
869 mprintf((0,"screenshot error, couldn't write to %s (err %i)\n",savename,errno));
876 mprintf((0,"screenshot error, couldn't open %s (err %i)\n",savename,errno));
879 void save_screen_shot(int automap_flag)
883 static int savenum=0;
887 if (!ogl_readpixels_ok){
889 hud_message(MSGC_GAME_FEEDBACK,"glReadPixels not supported on your configuration");
895 //added/changed on 10/31/98 by Victor Rachels to fix overwrite each new game
900 sprintf(savename, "scrn%04d.tga", savenum++);
901 } while (PHYSFS_exists(savename));
903 sprintf( message, "%s '%s'", TXT_DUMPING_SCREEN, savename );
904 //end this section addition/change - Victor Rachels
907 // save_font = grd_curcanv->cv_font;
908 // gr_set_curfont(GAME_FONT);
909 // gr_set_fontcolor(gr_find_closest_color_current(0,31,0),-1);
910 // gr_get_string_size(message,&w,&h,&aw);
911 // modex_print_message(32, 2, message);
913 hud_message(MSGC_GAME_FEEDBACK, "%s", message);
916 buf = d_malloc(grd_curscreen->sc_w*grd_curscreen->sc_h*3);
917 glReadBuffer(GL_FRONT);
918 glReadPixels(0,0,grd_curscreen->sc_w,grd_curscreen->sc_h,GL_RGB,GL_UNSIGNED_BYTE,buf);
919 write_bmp(savename,grd_curscreen->sc_w,grd_curscreen->sc_h,buf);