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comparison src/video/SDL_surface.c @ 2786:6bacfecbf27e

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author Sam Lantinga <slouken@libsdl.org>
date Tue, 25 Nov 2008 02:21:53 +0000
parents fa1095d42a5b
children 93764fe8601a
comparison
equal deleted inserted replaced
2785:fa1095d42a5b 2786:6bacfecbf27e
269 return 0; 269 return 0;
270 } 270 }
271 271
272 /* This is a fairly slow function to switch from colorkey to alpha */ 272 /* This is a fairly slow function to switch from colorkey to alpha */
273 void 273 void
274 SDL_ConvertColorkeyToAlpha(SDL_Surface *surface) 274 SDL_ConvertColorkeyToAlpha(SDL_Surface * surface)
275 { 275 {
276 int x, y; 276 int x, y;
277 277
278 if (!surface) { 278 if (!surface) {
279 return; 279 return;
280 } 280 }
281 281
282 if (!(surface->map->info.flags & SDL_COPY_COLORKEY) || 282 if (!(surface->map->info.flags & SDL_COPY_COLORKEY) ||
283 !surface->format->Amask) { 283 !surface->format->Amask) {
284 return; 284 return;
285 } 285 }
286 286
287 SDL_LockSurface(surface); 287 SDL_LockSurface(surface);
288 288
289 switch (surface->format->BytesPerPixel) { 289 switch (surface->format->BytesPerPixel) {
290 case 2: 290 case 2:
291 { 291 {
292 Uint16 *row, *spot; 292 Uint16 *row, *spot;
293 Uint16 ckey = (Uint16)surface->map->info.colorkey; 293 Uint16 ckey = (Uint16) surface->map->info.colorkey;
294 Uint16 mask = (Uint16)(~surface->format->Amask); 294 Uint16 mask = (Uint16) (~surface->format->Amask);
295 295
296 row = (Uint16 *)surface->pixels; 296 row = (Uint16 *) surface->pixels;
297 for (y = surface->h; y--; ) { 297 for (y = surface->h; y--;) {
298 spot = row; 298 spot = row;
299 for (x = surface->w; x--; ) { 299 for (x = surface->w; x--;) {
300 if (*spot == ckey) { 300 if (*spot == ckey) {
301 *spot &= mask; 301 *spot &= mask;
302 } 302 }
303 ++spot; 303 ++spot;
304 } 304 }
305 row += surface->pitch / 2; 305 row += surface->pitch / 2;
306 } 306 }
307 } 307 }
308 break; 308 break;
309 case 3: 309 case 3:
310 /* FIXME */ 310 /* FIXME */
311 break; 311 break;
312 case 4: 312 case 4:
313 { 313 {
314 Uint32 *row, *spot; 314 Uint32 *row, *spot;
315 Uint32 ckey = surface->map->info.colorkey; 315 Uint32 ckey = surface->map->info.colorkey;
316 Uint32 mask = ~surface->format->Amask; 316 Uint32 mask = ~surface->format->Amask;
317 317
318 row = (Uint32 *)surface->pixels; 318 row = (Uint32 *) surface->pixels;
319 for (y = surface->h; y--; ) { 319 for (y = surface->h; y--;) {
320 spot = row; 320 spot = row;
321 for (x = surface->w; x--; ) { 321 for (x = surface->w; x--;) {
322 if (*spot == ckey) { 322 if (*spot == ckey) {
323 *spot &= mask; 323 *spot &= mask;
324 } 324 }
325 ++spot; 325 ++spot;
326 } 326 }
327 row += surface->pitch / 4; 327 row += surface->pitch / 4;
328 } 328 }
329 } 329 }
330 break; 330 break;
331 } 331 }
332 332
333 SDL_UnlockSurface(surface); 333 SDL_UnlockSurface(surface);
334 334
335 SDL_SetColorKey(surface, 0, 0); 335 SDL_SetColorKey(surface, 0, 0);
336 } 336 }
337 337
338 int 338 int
339 SDL_SetSurfaceColorMod(SDL_Surface * surface, Uint8 r, Uint8 g, Uint8 b) 339 SDL_SetSurfaceColorMod(SDL_Surface * surface, Uint8 r, Uint8 g, Uint8 b)
340 { 340 {