1 /* $Id: gr.c,v 1.6 2002-08-02 11:05:25 btb Exp $ */
24 //added on 9/30/98 by Matt Mueller to set the title bar. Woohoo!
30 //added 10/05/98 by Matt Mueller - make fullscreen mode optional
33 int sdl_video_flags = SDL_SWSURFACE | SDL_HWPALETTE;
34 char checkvidmodeok=0;
41 //added 05/19/99 Matt Mueller - locking stuff
45 int gr_testlocklevel=0;
47 inline void gr_dolock(const char *file,int line) {
49 if ( gr_testlocklevel==1 && SDL_MUSTLOCK(screen) ) {
51 chcksetwritable(screen.pixels,screen->w*screen->h*screen->format->BytesPerPixel);
53 if ( SDL_LockSurface(screen) < 0 )Error("could not lock screen (%s:%i)\n",file,line);
56 inline void gr_dounlock(void) {
58 if (gr_testlocklevel==0 && SDL_MUSTLOCK(screen) ) {
59 SDL_UnlockSurface(screen);
61 chcksetunwritable(screen.pixels,screen->w*screen->h*screen->format->BytesPerPixel);
68 void gr_palette_clear(); // Function prototype for gr_init;
73 //added 05/19/99 Matt Mueller - locking stuff
76 SDL_UpdateRect(screen,0,0,0,0);
79 extern int VGA_current_mode; // DPH: kludge - remove at all costs
81 int gr_set_mode(u_int32_t mode)
94 VGA_current_mode = mode;
96 if (screen != NULL) gr_palette_clear();
98 //added on 11/06/98 by Matt Mueller to set the title bar. (moved from below)
99 //sekmu: might wanna copy this litte blurb to one of the text files or something
100 //we want to set it here so that X window manager "Style" type commands work
101 //for example, in fvwm2 or fvwm95:
102 //Style "D1X*" NoTitle, NoHandles, BorderWidth 0
103 //if you can't use -fullscreen like me (crashes X), this is a big help in
104 //getting the window centered correctly (if you use SmartPlacement)
105 SDL_WM_SetCaption(DESCENT_VERSION, "Descent II");
108 //edited 10/05/98 by Matt Mueller - make fullscreen mode optional
109 // changed by adb on 980913: added SDL_HWPALETTE (should be option?)
110 // changed by someone on 980923 to add SDL_FULLSCREEN
111 if(!checkvidmodeok || SDL_VideoModeOK(w,h,8,sdl_video_flags)){
112 screen = SDL_SetVideoMode(w, h, 8, sdl_video_flags);
116 // end changes by someone
117 // end changes by adb
119 if (screen == NULL) {
120 Error("Could not set %dx%dx8 video mode\n",w,h);
123 memset( grd_curscreen, 0, sizeof(grs_screen));
124 grd_curscreen->sc_mode = mode;
125 grd_curscreen->sc_w = w;
126 grd_curscreen->sc_h = h;
127 grd_curscreen->sc_aspect = fixdiv(grd_curscreen->sc_w*3,grd_curscreen->sc_h*4);
128 grd_curscreen->sc_canvas.cv_bitmap.bm_x = 0;
129 grd_curscreen->sc_canvas.cv_bitmap.bm_y = 0;
130 grd_curscreen->sc_canvas.cv_bitmap.bm_w = w;
131 grd_curscreen->sc_canvas.cv_bitmap.bm_h = h;
132 grd_curscreen->sc_canvas.cv_bitmap.bm_rowsize = screen->pitch;
133 grd_curscreen->sc_canvas.cv_bitmap.bm_type = BM_LINEAR;
134 grd_curscreen->sc_canvas.cv_bitmap.bm_data = (unsigned char *)screen->pixels;
135 gr_set_current_canvas(NULL);
136 //gr_enable_default_palette_loading();
138 //added on 9/30/98 by Matt Mueller to hide the mouse if its over the game window
141 //--moved up--added on 9/30/98 by Matt Mueller to set the title bar. Woohoo!
142 //--moved up-- SDL_WM_SetCaption(DESCENT_VERSION " " D1X_DATE, NULL);
143 //--moved up--end addition -MM
145 // gamefont_choose_game_font(w,h);
149 int gr_check_fullscreen(void){
150 return (sdl_video_flags & SDL_FULLSCREEN)?1:0;
153 int gr_toggle_fullscreen(void){
154 sdl_video_flags^=SDL_FULLSCREEN;
155 SDL_WM_ToggleFullScreen(screen);
156 return (sdl_video_flags & SDL_FULLSCREEN)?1:0;
162 int mode = MenuHires?SM(640,480):SM(320,200);
163 // Only do this function once!
167 if (SDL_Init(SDL_INIT_VIDEO) < 0)
169 Error("SDL library video initialisation failed: %s.",SDL_GetError());
171 MALLOC( grd_curscreen,grs_screen,1 );
172 memset( grd_curscreen, 0, sizeof(grs_screen));
174 //added 10/05/98 by Matt Mueller - make fullscreen mode optional
175 if (FindArg("-fullscreen"))
176 sdl_video_flags|=SDL_FULLSCREEN;
178 //added 05/19/99 Matt Mueller - make HW surface optional
179 if (FindArg("-hwsurface"))
180 sdl_video_flags|=SDL_HWSURFACE;
182 if (FindArg("-nosdlvidmodecheck"))
186 if ((retcode=gr_set_mode(mode)))
190 grd_curscreen->sc_canvas.cv_color = 0;
191 grd_curscreen->sc_canvas.cv_drawmode = 0;
192 grd_curscreen->sc_canvas.cv_font = NULL;
193 grd_curscreen->sc_canvas.cv_font_fg_color = 0;
194 grd_curscreen->sc_canvas.cv_font_bg_color = 0;
195 gr_set_current_canvas( &grd_curscreen->sc_canvas );
198 // added on 980913 by adb to add cleanup
200 // end changes by adb
210 d_free(grd_curscreen);
214 // Palette functions follow.
216 static int last_r=0, last_g=0, last_b=0;
218 void gr_palette_clear()
220 SDL_Palette *palette;
221 SDL_Color colors[256];
224 palette = screen->format->palette;
226 if (palette == NULL) {
227 return; // Display is not palettised
230 ncolors = palette->ncolors;
231 memset(colors, 0, ncolors * sizeof(SDL_Color));
233 SDL_SetColors(screen, colors, 0, 256);
235 gr_palette_faded_out = 1;
239 void gr_palette_step_up( int r, int g, int b )
242 ubyte *p = gr_palette;
245 SDL_Palette *palette;
246 SDL_Color colors[256];
248 if (gr_palette_faded_out) return;
250 if ( (r==last_r) && (g==last_g) && (b==last_b) ) return;
256 palette = screen->format->palette;
258 if (palette == NULL) {
259 return; // Display is not palettised
262 for (i=0; i<256; i++) {
263 temp = (int)(*p++) + r + gr_palette_gamma;
265 else if (temp>63) temp=63;
266 colors[i].r = temp * 4;
267 temp = (int)(*p++) + g + gr_palette_gamma;
269 else if (temp>63) temp=63;
270 colors[i].g = temp * 4;
271 temp = (int)(*p++) + b + gr_palette_gamma;
273 else if (temp>63) temp=63;
274 colors[i].b = temp * 4;
277 SDL_SetColors(screen, colors, 0, 256);
280 //added on 980913 by adb to fix palette problems
281 // need a min without side effects...
283 static inline int min(int x, int y) { return x < y ? x : y; }
286 void gr_palette_load( ubyte *pal )
289 SDL_Palette *palette;
290 SDL_Color colors[256];
292 for (i=0; i<768; i++ ) {
293 gr_current_pal[i] = pal[i];
294 if (gr_current_pal[i] > 63) gr_current_pal[i] = 63;
297 palette = screen->format->palette;
299 if (palette == NULL) {
300 return; // Display is not palettised
303 for (i = 0, j = 0; j < 256; j++) {
304 //changed on 980913 by adb to fix palette problems
305 colors[j].r = (min(gr_current_pal[i++] + gr_palette_gamma, 63)) * 4;
306 colors[j].g = (min(gr_current_pal[i++] + gr_palette_gamma, 63)) * 4;
307 colors[j].b = (min(gr_current_pal[i++] + gr_palette_gamma, 63)) * 4;
310 SDL_SetColors(screen, colors, 0, 256);
312 gr_palette_faded_out = 0;
313 init_computed_colors();
318 int gr_palette_fade_out(ubyte *pal, int nsteps, int allow_keys)
322 fix fade_palette[768];
323 fix fade_palette_delta[768];
325 SDL_Palette *palette;
326 SDL_Color fade_colors[256];
328 if (gr_palette_faded_out) return 0;
330 palette = screen->format->palette;
331 if (palette == NULL) {
332 return -1; // Display is not palettised
335 if (pal==NULL) pal=gr_current_pal;
337 for (i=0; i<768; i++ ) {
338 gr_current_pal[i] = pal[i];
339 fade_palette[i] = i2f(pal[i]);
340 fade_palette_delta[i] = fade_palette[i] / nsteps;
342 for (j=0; j<nsteps; j++ ) {
343 for (i=0, k = 0; k<256; k++ ) {
344 fade_palette[i] -= fade_palette_delta[i];
345 if (fade_palette[i] > i2f(pal[i] + gr_palette_gamma) )
346 fade_palette[i] = i2f(pal[i] + gr_palette_gamma);
347 c = f2i(fade_palette[i]);
349 fade_colors[k].r = c * 4;
352 fade_palette[i] -= fade_palette_delta[i];
353 if (fade_palette[i] > i2f(pal[i] + gr_palette_gamma) )
354 fade_palette[i] = i2f(pal[i] + gr_palette_gamma);
355 c = f2i(fade_palette[i]);
357 fade_colors[k].g = c * 4;
360 fade_palette[i] -= fade_palette_delta[i];
361 if (fade_palette[i] > i2f(pal[i] + gr_palette_gamma) )
362 fade_palette[i] = i2f(pal[i] + gr_palette_gamma);
363 c = f2i(fade_palette[i]);
365 fade_colors[k].b = c * 4;
369 SDL_SetColors(screen, fade_colors, 0, 256);
372 gr_palette_faded_out = 1;
378 int gr_palette_fade_in(ubyte *pal, int nsteps, int allow_keys)
380 int i, j, k, ncolors;
382 fix fade_palette[768];
383 fix fade_palette_delta[768];
385 SDL_Palette *palette;
386 SDL_Color fade_colors[256];
388 if (!gr_palette_faded_out) return 0;
390 palette = screen->format->palette;
392 if (palette == NULL) {
393 return -1; // Display is not palettised
396 ncolors = palette->ncolors;
398 for (i=0; i<768; i++ ) {
399 gr_current_pal[i] = pal[i];
401 fade_palette_delta[i] = i2f(pal[i]) / nsteps;
404 for (j=0; j<nsteps; j++ ) {
405 for (i=0, k = 0; k<256; k++ ) {
406 fade_palette[i] += fade_palette_delta[i];
407 if (fade_palette[i] > i2f(pal[i] + gr_palette_gamma) )
408 fade_palette[i] = i2f(pal[i] + gr_palette_gamma);
409 c = f2i(fade_palette[i]);
411 fade_colors[k].r = c * 4;
414 fade_palette[i] += fade_palette_delta[i];
415 if (fade_palette[i] > i2f(pal[i] + gr_palette_gamma) )
416 fade_palette[i] = i2f(pal[i] + gr_palette_gamma);
417 c = f2i(fade_palette[i]);
419 fade_colors[k].g = c * 4;
422 fade_palette[i] += fade_palette_delta[i];
423 if (fade_palette[i] > i2f(pal[i] + gr_palette_gamma) )
424 fade_palette[i] = i2f(pal[i] + gr_palette_gamma);
425 c = f2i(fade_palette[i]);
427 fade_colors[k].b = c * 4;
431 SDL_SetColors(screen, fade_colors, 0, 256);
433 //added on 980913 by adb to fix palette problems
434 gr_palette_load(pal);
437 gr_palette_faded_out = 0;
443 void gr_palette_read(ubyte * pal)
445 SDL_Palette *palette;
448 palette = screen->format->palette;
450 if (palette == NULL) {
451 return; // Display is not palettised
454 for (i = 0, j=0; i < 256; i++) {
455 pal[j++] = palette->colors[i].r / 4;
456 pal[j++] = palette->colors[i].g / 4;
457 pal[j++] = palette->colors[i].b / 4;