1 /* $Id: gr.c,v 1.15 2003-11-27 09:10:52 btb Exp $ */
17 #include <SDL_image.h>
27 //added 10/05/98 by Matt Mueller - make fullscreen mode optional
30 #ifdef _WIN32_WCE // should really be checking for "Pocket PC" somehow
34 int sdl_video_flags = SDL_SWSURFACE | SDL_HWPALETTE;
39 static SDL_Surface *real_screen, *screen2;
44 //added 05/19/99 Matt Mueller - locking stuff
48 int gr_testlocklevel=0;
50 inline void gr_dolock(const char *file,int line) {
52 if ( gr_testlocklevel==1 && SDL_MUSTLOCK(screen) ) {
54 chcksetwritable(screen.pixels,screen->w*screen->h*screen->format->BytesPerPixel);
56 if ( SDL_LockSurface(screen) < 0 )Error("could not lock screen (%s:%i)\n",file,line);
59 inline void gr_dounlock(void) {
61 if (gr_testlocklevel==0 && SDL_MUSTLOCK(screen) ) {
62 SDL_UnlockSurface(screen);
64 chcksetunwritable(screen.pixels,screen->w*screen->h*screen->format->BytesPerPixel);
72 /* Create a new rotated surface for drawing */
73 SDL_Surface *CreateRotatedSurface(SDL_Surface *s)
76 return(SDL_CreateRGBSurface(s->flags, s->h, s->w,
77 s->format->BitsPerPixel,
83 return(SDL_CreateRGBSurface(s->flags, s->h, s->w, 8, 0, 0, 0, 0));
87 /* Used to copy the rotated scratch surface to the screen */
88 void BlitRotatedSurface(SDL_Surface *from, SDL_Surface *to)
91 int bpp = from->format->BytesPerPixel;
92 int w=from->w, h=from->h, pitch=to->pitch;
94 Uint8 *pfrom, *pto, *to0;
96 SDL_LockSurface(from);
98 pfrom=(Uint8 *)from->pixels;
99 to0=(Uint8 *) to->pixels+pitch*(w-1);
106 if (bpp==1) *pto=*pfrom;
107 else if (bpp==2) *(Uint16 *)pto=*(Uint16 *)pfrom;
108 else if (bpp==4) *(Uint32 *)pto=*(Uint32 *)pfrom;
119 SDL_UnlockSurface(from);
120 SDL_UnlockSurface(to);
124 void gr_palette_clear(); // Function prototype for gr_init;
129 //added 05/19/99 Matt Mueller - locking stuff
133 screen2 = SDL_DisplayFormat(screen);
134 BlitRotatedSurface(screen2, real_screen);
135 //SDL_SetColors(real_screen, screen->format->palette->colors, 0, 256);
136 SDL_UpdateRect(real_screen, 0, 0, 0, 0);
137 SDL_FreeSurface(screen2);
139 SDL_UpdateRect(screen, 0, 0, 0, 0);
144 int gr_check_mode(uint32_t mode)
151 return !SDL_VideoModeOK(w, h, 8, sdl_video_flags);
155 extern int VGA_current_mode; // DPH: kludge - remove at all costs
157 int gr_set_mode(uint32_t mode)
168 if (mode == VGA_current_mode)
173 VGA_current_mode = mode;
175 if (screen != NULL) gr_palette_clear();
177 //added on 11/06/98 by Matt Mueller to set the title bar. (moved from below)
178 //sekmu: might wanna copy this litte blurb to one of the text files or something
179 //we want to set it here so that X window manager "Style" type commands work
180 //for example, in fvwm2 or fvwm95:
181 //Style "D1X*" NoTitle, NoHandles, BorderWidth 0
182 //if you can't use -fullscreen like me (crashes X), this is a big help in
183 //getting the window centered correctly (if you use SmartPlacement)
184 SDL_WM_SetCaption(PACKAGE_STRING, "Descent II");
189 #include "descent.xpm"
190 SDL_WM_SetIcon(IMG_ReadXPMFromArray(pixmap), NULL);
194 //edited 10/05/98 by Matt Mueller - make fullscreen mode optional
195 // changed by adb on 980913: added SDL_HWPALETTE (should be option?)
196 // changed by someone on 980923 to add SDL_FULLSCREEN
199 real_screen = SDL_SetVideoMode(h, w, 0, sdl_video_flags);
200 screen = CreateRotatedSurface(real_screen);
202 screen = SDL_SetVideoMode(w, h, 8, sdl_video_flags);
204 // end changes by someone
205 // end changes by adb
207 if (screen == NULL) {
208 Error("Could not set %dx%dx8 video mode\n",w,h);
210 memset( grd_curscreen, 0, sizeof(grs_screen));
211 grd_curscreen->sc_mode = mode;
212 grd_curscreen->sc_w = w;
213 grd_curscreen->sc_h = h;
214 grd_curscreen->sc_aspect = fixdiv(grd_curscreen->sc_w*3,grd_curscreen->sc_h*4);
215 grd_curscreen->sc_canvas.cv_bitmap.bm_x = 0;
216 grd_curscreen->sc_canvas.cv_bitmap.bm_y = 0;
217 grd_curscreen->sc_canvas.cv_bitmap.bm_w = w;
218 grd_curscreen->sc_canvas.cv_bitmap.bm_h = h;
219 grd_curscreen->sc_canvas.cv_bitmap.bm_rowsize = screen->pitch;
220 grd_curscreen->sc_canvas.cv_bitmap.bm_type = BM_LINEAR;
221 grd_curscreen->sc_canvas.cv_bitmap.bm_data = (unsigned char *)screen->pixels;
222 gr_set_current_canvas(NULL);
223 //gr_enable_default_palette_loading();
225 //added on 9/30/98 by Matt Mueller to hide the mouse if its over the game window
228 //--moved up--added on 9/30/98 by Matt Mueller to set the title bar. Woohoo!
229 //--moved up-- SDL_WM_SetCaption(DESCENT_VERSION " " D1X_DATE, NULL);
230 //--moved up--end addition -MM
232 // gamefont_choose_game_font(w,h);
236 int gr_check_fullscreen(void){
237 return (sdl_video_flags & SDL_FULLSCREEN)?1:0;
240 int gr_toggle_fullscreen(void){
241 sdl_video_flags^=SDL_FULLSCREEN;
242 SDL_WM_ToggleFullScreen(screen);
243 return (sdl_video_flags & SDL_FULLSCREEN)?1:0;
248 // Only do this function once!
252 if (SDL_Init(SDL_INIT_VIDEO) < 0)
254 Error("SDL library video initialisation failed: %s.",SDL_GetError());
256 MALLOC( grd_curscreen,grs_screen,1 );
257 memset( grd_curscreen, 0, sizeof(grs_screen));
259 //added 10/05/98 by Matt Mueller - make fullscreen mode optional
260 if (FindArg("-fullscreen"))
261 sdl_video_flags|=SDL_FULLSCREEN;
263 //added 05/19/99 Matt Mueller - make HW surface optional
264 if (FindArg("-hwsurface"))
265 sdl_video_flags|=SDL_HWSURFACE;
268 grd_curscreen->sc_canvas.cv_color = 0;
269 grd_curscreen->sc_canvas.cv_drawmode = 0;
270 grd_curscreen->sc_canvas.cv_font = NULL;
271 grd_curscreen->sc_canvas.cv_font_fg_color = 0;
272 grd_curscreen->sc_canvas.cv_font_bg_color = 0;
273 gr_set_current_canvas( &grd_curscreen->sc_canvas );
276 // added on 980913 by adb to add cleanup
278 // end changes by adb
288 d_free(grd_curscreen);
292 // Palette functions follow.
294 static int last_r=0, last_g=0, last_b=0;
296 void gr_palette_clear()
298 SDL_Palette *palette;
299 SDL_Color colors[256];
302 palette = screen->format->palette;
304 if (palette == NULL) {
305 return; // Display is not palettised
308 ncolors = palette->ncolors;
309 memset(colors, 0, ncolors * sizeof(SDL_Color));
311 SDL_SetColors(screen, colors, 0, 256);
313 gr_palette_faded_out = 1;
317 void gr_palette_step_up( int r, int g, int b )
320 ubyte *p = gr_palette;
323 SDL_Palette *palette;
324 SDL_Color colors[256];
326 if (gr_palette_faded_out) return;
328 if ( (r==last_r) && (g==last_g) && (b==last_b) ) return;
334 palette = screen->format->palette;
336 if (palette == NULL) {
337 return; // Display is not palettised
340 for (i=0; i<256; i++) {
341 temp = (int)(*p++) + r + gr_palette_gamma;
343 else if (temp>63) temp=63;
344 colors[i].r = temp * 4;
345 temp = (int)(*p++) + g + gr_palette_gamma;
347 else if (temp>63) temp=63;
348 colors[i].g = temp * 4;
349 temp = (int)(*p++) + b + gr_palette_gamma;
351 else if (temp>63) temp=63;
352 colors[i].b = temp * 4;
355 SDL_SetColors(screen, colors, 0, 256);
358 //added on 980913 by adb to fix palette problems
359 // need a min without side effects...
361 static inline int min(int x, int y) { return x < y ? x : y; }
364 void gr_palette_load( ubyte *pal )
367 SDL_Palette *palette;
368 SDL_Color colors[256];
370 for (i=0; i<768; i++ ) {
371 gr_current_pal[i] = pal[i];
372 if (gr_current_pal[i] > 63) gr_current_pal[i] = 63;
375 palette = screen->format->palette;
377 if (palette == NULL) {
378 return; // Display is not palettised
381 for (i = 0, j = 0; j < 256; j++) {
382 //changed on 980913 by adb to fix palette problems
383 colors[j].r = (min(gr_current_pal[i++] + gr_palette_gamma, 63)) * 4;
384 colors[j].g = (min(gr_current_pal[i++] + gr_palette_gamma, 63)) * 4;
385 colors[j].b = (min(gr_current_pal[i++] + gr_palette_gamma, 63)) * 4;
388 SDL_SetColors(screen, colors, 0, 256);
390 gr_palette_faded_out = 0;
391 init_computed_colors();
396 int gr_palette_fade_out(ubyte *pal, int nsteps, int allow_keys)
400 fix fade_palette[768];
401 fix fade_palette_delta[768];
403 SDL_Palette *palette;
404 SDL_Color fade_colors[256];
406 if (gr_palette_faded_out) return 0;
408 #if 1 //ifndef NDEBUG
409 if (grd_fades_disabled) {
415 palette = screen->format->palette;
416 if (palette == NULL) {
417 return -1; // Display is not palettised
420 if (pal==NULL) pal=gr_current_pal;
422 for (i=0; i<768; i++ ) {
423 gr_current_pal[i] = pal[i];
424 fade_palette[i] = i2f(pal[i]);
425 fade_palette_delta[i] = fade_palette[i] / nsteps;
427 for (j=0; j<nsteps; j++ ) {
428 for (i=0, k = 0; k<256; k++ ) {
429 fade_palette[i] -= fade_palette_delta[i];
430 if (fade_palette[i] > i2f(pal[i] + gr_palette_gamma) )
431 fade_palette[i] = i2f(pal[i] + gr_palette_gamma);
432 c = f2i(fade_palette[i]);
434 fade_colors[k].r = c * 4;
437 fade_palette[i] -= fade_palette_delta[i];
438 if (fade_palette[i] > i2f(pal[i] + gr_palette_gamma) )
439 fade_palette[i] = i2f(pal[i] + gr_palette_gamma);
440 c = f2i(fade_palette[i]);
442 fade_colors[k].g = c * 4;
445 fade_palette[i] -= fade_palette_delta[i];
446 if (fade_palette[i] > i2f(pal[i] + gr_palette_gamma) )
447 fade_palette[i] = i2f(pal[i] + gr_palette_gamma);
448 c = f2i(fade_palette[i]);
450 fade_colors[k].b = c * 4;
454 SDL_SetColors(screen, fade_colors, 0, 256);
457 gr_palette_faded_out = 1;
463 int gr_palette_fade_in(ubyte *pal, int nsteps, int allow_keys)
465 int i, j, k, ncolors;
467 fix fade_palette[768];
468 fix fade_palette_delta[768];
470 SDL_Palette *palette;
471 SDL_Color fade_colors[256];
473 if (!gr_palette_faded_out) return 0;
475 #if 1 //ifndef NDEBUG
476 if (grd_fades_disabled) {
477 gr_palette_load(pal);
482 palette = screen->format->palette;
484 if (palette == NULL) {
485 return -1; // Display is not palettised
488 ncolors = palette->ncolors;
490 for (i=0; i<768; i++ ) {
491 gr_current_pal[i] = pal[i];
493 fade_palette_delta[i] = i2f(pal[i]) / nsteps;
496 for (j=0; j<nsteps; j++ ) {
497 for (i=0, k = 0; k<256; k++ ) {
498 fade_palette[i] += fade_palette_delta[i];
499 if (fade_palette[i] > i2f(pal[i] + gr_palette_gamma) )
500 fade_palette[i] = i2f(pal[i] + gr_palette_gamma);
501 c = f2i(fade_palette[i]);
503 fade_colors[k].r = c * 4;
506 fade_palette[i] += fade_palette_delta[i];
507 if (fade_palette[i] > i2f(pal[i] + gr_palette_gamma) )
508 fade_palette[i] = i2f(pal[i] + gr_palette_gamma);
509 c = f2i(fade_palette[i]);
511 fade_colors[k].g = c * 4;
514 fade_palette[i] += fade_palette_delta[i];
515 if (fade_palette[i] > i2f(pal[i] + gr_palette_gamma) )
516 fade_palette[i] = i2f(pal[i] + gr_palette_gamma);
517 c = f2i(fade_palette[i]);
519 fade_colors[k].b = c * 4;
523 SDL_SetColors(screen, fade_colors, 0, 256);
525 //added on 980913 by adb to fix palette problems
526 gr_palette_load(pal);
529 gr_palette_faded_out = 0;
535 void gr_palette_read(ubyte * pal)
537 SDL_Palette *palette;
540 palette = screen->format->palette;
542 if (palette == NULL) {
543 return; // Display is not palettised
546 for (i = 0, j=0; i < 256; i++) {
547 pal[j++] = palette->colors[i].r / 4;
548 pal[j++] = palette->colors[i].g / 4;
549 pal[j++] = palette->colors[i].b / 4;