diff options
Diffstat (limited to 'apps/plugins/sdl/src/video/SDL_blit_1.c')
-rw-r--r-- | apps/plugins/sdl/src/video/SDL_blit_1.c | 523 |
1 files changed, 523 insertions, 0 deletions
diff --git a/apps/plugins/sdl/src/video/SDL_blit_1.c b/apps/plugins/sdl/src/video/SDL_blit_1.c new file mode 100644 index 0000000000..7f95f5bf35 --- /dev/null +++ b/apps/plugins/sdl/src/video/SDL_blit_1.c | |||
@@ -0,0 +1,523 @@ | |||
1 | /* | ||
2 | SDL - Simple DirectMedia Layer | ||
3 | Copyright (C) 1997-2012 Sam Lantinga | ||
4 | |||
5 | This library is free software; you can redistribute it and/or | ||
6 | modify it under the terms of the GNU Lesser General Public | ||
7 | License as published by the Free Software Foundation; either | ||
8 | version 2.1 of the License, or (at your option) any later version. | ||
9 | |||
10 | This library is distributed in the hope that it will be useful, | ||
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
13 | Lesser General Public License for more details. | ||
14 | |||
15 | You should have received a copy of the GNU Lesser General Public | ||
16 | License along with this library; if not, write to the Free Software | ||
17 | Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | ||
18 | |||
19 | Sam Lantinga | ||
20 | slouken@libsdl.org | ||
21 | */ | ||
22 | #include "SDL_config.h" | ||
23 | |||
24 | #include "SDL_video.h" | ||
25 | #include "SDL_blit.h" | ||
26 | #include "SDL_sysvideo.h" | ||
27 | #include "SDL_endian.h" | ||
28 | |||
29 | /* Functions to blit from 8-bit surfaces to other surfaces */ | ||
30 | |||
31 | static void Blit1to1(SDL_BlitInfo *info) | ||
32 | { | ||
33 | #ifndef USE_DUFFS_LOOP | ||
34 | int c; | ||
35 | #endif | ||
36 | int width, height; | ||
37 | Uint8 *src, *map, *dst; | ||
38 | int srcskip, dstskip; | ||
39 | |||
40 | /* Set up some basic variables */ | ||
41 | width = info->d_width; | ||
42 | height = info->d_height; | ||
43 | src = info->s_pixels; | ||
44 | srcskip = info->s_skip; | ||
45 | dst = info->d_pixels; | ||
46 | dstskip = info->d_skip; | ||
47 | map = info->table; | ||
48 | |||
49 | while ( height-- ) { | ||
50 | #ifdef USE_DUFFS_LOOP | ||
51 | DUFFS_LOOP( | ||
52 | { | ||
53 | *dst = map[*src]; | ||
54 | } | ||
55 | dst++; | ||
56 | src++; | ||
57 | , width); | ||
58 | #else | ||
59 | for ( c=width; c; --c ) { | ||
60 | *dst = map[*src]; | ||
61 | dst++; | ||
62 | src++; | ||
63 | } | ||
64 | #endif | ||
65 | src += srcskip; | ||
66 | dst += dstskip; | ||
67 | } | ||
68 | } | ||
69 | /* This is now endian dependent */ | ||
70 | #if ( SDL_BYTEORDER == SDL_LIL_ENDIAN ) | ||
71 | #define HI 1 | ||
72 | #define LO 0 | ||
73 | #else /* ( SDL_BYTEORDER == SDL_BIG_ENDIAN ) */ | ||
74 | #define HI 0 | ||
75 | #define LO 1 | ||
76 | #endif | ||
77 | static void Blit1to2(SDL_BlitInfo *info) | ||
78 | { | ||
79 | #ifndef USE_DUFFS_LOOP | ||
80 | int c; | ||
81 | #endif | ||
82 | int width, height; | ||
83 | Uint8 *src, *dst; | ||
84 | Uint16 *map; | ||
85 | int srcskip, dstskip; | ||
86 | |||
87 | /* Set up some basic variables */ | ||
88 | width = info->d_width; | ||
89 | height = info->d_height; | ||
90 | src = info->s_pixels; | ||
91 | srcskip = info->s_skip; | ||
92 | dst = info->d_pixels; | ||
93 | dstskip = info->d_skip; | ||
94 | map = (Uint16 *)info->table; | ||
95 | |||
96 | #ifdef USE_DUFFS_LOOP | ||
97 | while ( height-- ) { | ||
98 | DUFFS_LOOP( | ||
99 | { | ||
100 | *(Uint16 *)dst = map[*src++]; | ||
101 | dst += 2; | ||
102 | }, | ||
103 | width); | ||
104 | src += srcskip; | ||
105 | dst += dstskip; | ||
106 | } | ||
107 | #else | ||
108 | /* Memory align at 4-byte boundary, if necessary */ | ||
109 | if ( (long)dst & 0x03 ) { | ||
110 | /* Don't do anything if width is 0 */ | ||
111 | if ( width == 0 ) { | ||
112 | return; | ||
113 | } | ||
114 | --width; | ||
115 | |||
116 | while ( height-- ) { | ||
117 | /* Perform copy alignment */ | ||
118 | *(Uint16 *)dst = map[*src++]; | ||
119 | dst += 2; | ||
120 | |||
121 | /* Copy in 4 pixel chunks */ | ||
122 | for ( c=width/4; c; --c ) { | ||
123 | *(Uint32 *)dst = | ||
124 | (map[src[HI]]<<16)|(map[src[LO]]); | ||
125 | src += 2; | ||
126 | dst += 4; | ||
127 | *(Uint32 *)dst = | ||
128 | (map[src[HI]]<<16)|(map[src[LO]]); | ||
129 | src += 2; | ||
130 | dst += 4; | ||
131 | } | ||
132 | /* Get any leftovers */ | ||
133 | switch (width & 3) { | ||
134 | case 3: | ||
135 | *(Uint16 *)dst = map[*src++]; | ||
136 | dst += 2; | ||
137 | case 2: | ||
138 | *(Uint32 *)dst = | ||
139 | (map[src[HI]]<<16)|(map[src[LO]]); | ||
140 | src += 2; | ||
141 | dst += 4; | ||
142 | break; | ||
143 | case 1: | ||
144 | *(Uint16 *)dst = map[*src++]; | ||
145 | dst += 2; | ||
146 | break; | ||
147 | } | ||
148 | src += srcskip; | ||
149 | dst += dstskip; | ||
150 | } | ||
151 | } else { | ||
152 | while ( height-- ) { | ||
153 | /* Copy in 4 pixel chunks */ | ||
154 | for ( c=width/4; c; --c ) { | ||
155 | *(Uint32 *)dst = | ||
156 | (map[src[HI]]<<16)|(map[src[LO]]); | ||
157 | src += 2; | ||
158 | dst += 4; | ||
159 | *(Uint32 *)dst = | ||
160 | (map[src[HI]]<<16)|(map[src[LO]]); | ||
161 | src += 2; | ||
162 | dst += 4; | ||
163 | } | ||
164 | /* Get any leftovers */ | ||
165 | switch (width & 3) { | ||
166 | case 3: | ||
167 | *(Uint16 *)dst = map[*src++]; | ||
168 | dst += 2; | ||
169 | case 2: | ||
170 | *(Uint32 *)dst = | ||
171 | (map[src[HI]]<<16)|(map[src[LO]]); | ||
172 | src += 2; | ||
173 | dst += 4; | ||
174 | break; | ||
175 | case 1: | ||
176 | *(Uint16 *)dst = map[*src++]; | ||
177 | dst += 2; | ||
178 | break; | ||
179 | } | ||
180 | src += srcskip; | ||
181 | dst += dstskip; | ||
182 | } | ||
183 | } | ||
184 | #endif /* USE_DUFFS_LOOP */ | ||
185 | } | ||
186 | static void Blit1to3(SDL_BlitInfo *info) | ||
187 | { | ||
188 | #ifndef USE_DUFFS_LOOP | ||
189 | int c; | ||
190 | #endif | ||
191 | int o; | ||
192 | int width, height; | ||
193 | Uint8 *src, *map, *dst; | ||
194 | int srcskip, dstskip; | ||
195 | |||
196 | /* Set up some basic variables */ | ||
197 | width = info->d_width; | ||
198 | height = info->d_height; | ||
199 | src = info->s_pixels; | ||
200 | srcskip = info->s_skip; | ||
201 | dst = info->d_pixels; | ||
202 | dstskip = info->d_skip; | ||
203 | map = info->table; | ||
204 | |||
205 | while ( height-- ) { | ||
206 | #ifdef USE_DUFFS_LOOP | ||
207 | DUFFS_LOOP( | ||
208 | { | ||
209 | o = *src * 4; | ||
210 | dst[0] = map[o++]; | ||
211 | dst[1] = map[o++]; | ||
212 | dst[2] = map[o++]; | ||
213 | } | ||
214 | src++; | ||
215 | dst += 3; | ||
216 | , width); | ||
217 | #else | ||
218 | for ( c=width; c; --c ) { | ||
219 | o = *src * 4; | ||
220 | dst[0] = map[o++]; | ||
221 | dst[1] = map[o++]; | ||
222 | dst[2] = map[o++]; | ||
223 | src++; | ||
224 | dst += 3; | ||
225 | } | ||
226 | #endif /* USE_DUFFS_LOOP */ | ||
227 | src += srcskip; | ||
228 | dst += dstskip; | ||
229 | } | ||
230 | } | ||
231 | static void Blit1to4(SDL_BlitInfo *info) | ||
232 | { | ||
233 | #ifndef USE_DUFFS_LOOP | ||
234 | int c; | ||
235 | #endif | ||
236 | int width, height; | ||
237 | Uint8 *src; | ||
238 | Uint32 *map, *dst; | ||
239 | int srcskip, dstskip; | ||
240 | |||
241 | /* Set up some basic variables */ | ||
242 | width = info->d_width; | ||
243 | height = info->d_height; | ||
244 | src = info->s_pixels; | ||
245 | srcskip = info->s_skip; | ||
246 | dst = (Uint32 *)info->d_pixels; | ||
247 | dstskip = info->d_skip/4; | ||
248 | map = (Uint32 *)info->table; | ||
249 | |||
250 | while ( height-- ) { | ||
251 | #ifdef USE_DUFFS_LOOP | ||
252 | DUFFS_LOOP( | ||
253 | *dst++ = map[*src++]; | ||
254 | , width); | ||
255 | #else | ||
256 | for ( c=width/4; c; --c ) { | ||
257 | *dst++ = map[*src++]; | ||
258 | *dst++ = map[*src++]; | ||
259 | *dst++ = map[*src++]; | ||
260 | *dst++ = map[*src++]; | ||
261 | } | ||
262 | switch ( width & 3 ) { | ||
263 | case 3: | ||
264 | *dst++ = map[*src++]; | ||
265 | case 2: | ||
266 | *dst++ = map[*src++]; | ||
267 | case 1: | ||
268 | *dst++ = map[*src++]; | ||
269 | } | ||
270 | #endif /* USE_DUFFS_LOOP */ | ||
271 | src += srcskip; | ||
272 | dst += dstskip; | ||
273 | } | ||
274 | } | ||
275 | |||
276 | static void Blit1to1Key(SDL_BlitInfo *info) | ||
277 | { | ||
278 | int width = info->d_width; | ||
279 | int height = info->d_height; | ||
280 | Uint8 *src = info->s_pixels; | ||
281 | int srcskip = info->s_skip; | ||
282 | Uint8 *dst = info->d_pixels; | ||
283 | int dstskip = info->d_skip; | ||
284 | Uint8 *palmap = info->table; | ||
285 | Uint32 ckey = info->src->colorkey; | ||
286 | |||
287 | if ( palmap ) { | ||
288 | while ( height-- ) { | ||
289 | DUFFS_LOOP( | ||
290 | { | ||
291 | if ( *src != ckey ) { | ||
292 | *dst = palmap[*src]; | ||
293 | } | ||
294 | dst++; | ||
295 | src++; | ||
296 | }, | ||
297 | width); | ||
298 | src += srcskip; | ||
299 | dst += dstskip; | ||
300 | } | ||
301 | } else { | ||
302 | while ( height-- ) { | ||
303 | DUFFS_LOOP( | ||
304 | { | ||
305 | if ( *src != ckey ) { | ||
306 | *dst = *src; | ||
307 | } | ||
308 | dst++; | ||
309 | src++; | ||
310 | }, | ||
311 | width); | ||
312 | src += srcskip; | ||
313 | dst += dstskip; | ||
314 | } | ||
315 | } | ||
316 | } | ||
317 | |||
318 | static void Blit1to2Key(SDL_BlitInfo *info) | ||
319 | { | ||
320 | int width = info->d_width; | ||
321 | int height = info->d_height; | ||
322 | Uint8 *src = info->s_pixels; | ||
323 | int srcskip = info->s_skip; | ||
324 | Uint16 *dstp = (Uint16 *)info->d_pixels; | ||
325 | int dstskip = info->d_skip; | ||
326 | Uint16 *palmap = (Uint16 *)info->table; | ||
327 | Uint32 ckey = info->src->colorkey; | ||
328 | |||
329 | /* Set up some basic variables */ | ||
330 | dstskip /= 2; | ||
331 | |||
332 | while ( height-- ) { | ||
333 | DUFFS_LOOP( | ||
334 | { | ||
335 | if ( *src != ckey ) { | ||
336 | *dstp=palmap[*src]; | ||
337 | } | ||
338 | src++; | ||
339 | dstp++; | ||
340 | }, | ||
341 | width); | ||
342 | src += srcskip; | ||
343 | dstp += dstskip; | ||
344 | } | ||
345 | } | ||
346 | |||
347 | static void Blit1to3Key(SDL_BlitInfo *info) | ||
348 | { | ||
349 | int width = info->d_width; | ||
350 | int height = info->d_height; | ||
351 | Uint8 *src = info->s_pixels; | ||
352 | int srcskip = info->s_skip; | ||
353 | Uint8 *dst = info->d_pixels; | ||
354 | int dstskip = info->d_skip; | ||
355 | Uint8 *palmap = info->table; | ||
356 | Uint32 ckey = info->src->colorkey; | ||
357 | int o; | ||
358 | |||
359 | while ( height-- ) { | ||
360 | DUFFS_LOOP( | ||
361 | { | ||
362 | if ( *src != ckey ) { | ||
363 | o = *src * 4; | ||
364 | dst[0] = palmap[o++]; | ||
365 | dst[1] = palmap[o++]; | ||
366 | dst[2] = palmap[o++]; | ||
367 | } | ||
368 | src++; | ||
369 | dst += 3; | ||
370 | }, | ||
371 | width); | ||
372 | src += srcskip; | ||
373 | dst += dstskip; | ||
374 | } | ||
375 | } | ||
376 | |||
377 | static void Blit1to4Key(SDL_BlitInfo *info) | ||
378 | { | ||
379 | int width = info->d_width; | ||
380 | int height = info->d_height; | ||
381 | Uint8 *src = info->s_pixels; | ||
382 | int srcskip = info->s_skip; | ||
383 | Uint32 *dstp = (Uint32 *)info->d_pixels; | ||
384 | int dstskip = info->d_skip; | ||
385 | Uint32 *palmap = (Uint32 *)info->table; | ||
386 | Uint32 ckey = info->src->colorkey; | ||
387 | |||
388 | /* Set up some basic variables */ | ||
389 | dstskip /= 4; | ||
390 | |||
391 | while ( height-- ) { | ||
392 | DUFFS_LOOP( | ||
393 | { | ||
394 | if ( *src != ckey ) { | ||
395 | *dstp = palmap[*src]; | ||
396 | } | ||
397 | src++; | ||
398 | dstp++; | ||
399 | }, | ||
400 | width); | ||
401 | src += srcskip; | ||
402 | dstp += dstskip; | ||
403 | } | ||
404 | } | ||
405 | |||
406 | static void Blit1toNAlpha(SDL_BlitInfo *info) | ||
407 | { | ||
408 | int width = info->d_width; | ||
409 | int height = info->d_height; | ||
410 | Uint8 *src = info->s_pixels; | ||
411 | int srcskip = info->s_skip; | ||
412 | Uint8 *dst = info->d_pixels; | ||
413 | int dstskip = info->d_skip; | ||
414 | SDL_PixelFormat *dstfmt = info->dst; | ||
415 | const SDL_Color *srcpal = info->src->palette->colors; | ||
416 | int dstbpp; | ||
417 | const int A = info->src->alpha; | ||
418 | |||
419 | /* Set up some basic variables */ | ||
420 | dstbpp = dstfmt->BytesPerPixel; | ||
421 | |||
422 | while ( height-- ) { | ||
423 | int sR, sG, sB; | ||
424 | int dR, dG, dB; | ||
425 | DUFFS_LOOP4( | ||
426 | { | ||
427 | Uint32 pixel; | ||
428 | sR = srcpal[*src].r; | ||
429 | sG = srcpal[*src].g; | ||
430 | sB = srcpal[*src].b; | ||
431 | DISEMBLE_RGB(dst, dstbpp, dstfmt, | ||
432 | pixel, dR, dG, dB); | ||
433 | ALPHA_BLEND(sR, sG, sB, A, dR, dG, dB); | ||
434 | ASSEMBLE_RGB(dst, dstbpp, dstfmt, dR, dG, dB); | ||
435 | src++; | ||
436 | dst += dstbpp; | ||
437 | }, | ||
438 | width); | ||
439 | src += srcskip; | ||
440 | dst += dstskip; | ||
441 | } | ||
442 | } | ||
443 | |||
444 | static void Blit1toNAlphaKey(SDL_BlitInfo *info) | ||
445 | { | ||
446 | int width = info->d_width; | ||
447 | int height = info->d_height; | ||
448 | Uint8 *src = info->s_pixels; | ||
449 | int srcskip = info->s_skip; | ||
450 | Uint8 *dst = info->d_pixels; | ||
451 | int dstskip = info->d_skip; | ||
452 | SDL_PixelFormat *srcfmt = info->src; | ||
453 | SDL_PixelFormat *dstfmt = info->dst; | ||
454 | const SDL_Color *srcpal = info->src->palette->colors; | ||
455 | Uint32 ckey = srcfmt->colorkey; | ||
456 | int dstbpp; | ||
457 | const int A = srcfmt->alpha; | ||
458 | |||
459 | /* Set up some basic variables */ | ||
460 | dstbpp = dstfmt->BytesPerPixel; | ||
461 | |||
462 | while ( height-- ) { | ||
463 | int sR, sG, sB; | ||
464 | int dR, dG, dB; | ||
465 | DUFFS_LOOP( | ||
466 | { | ||
467 | if ( *src != ckey ) { | ||
468 | Uint32 pixel; | ||
469 | sR = srcpal[*src].r; | ||
470 | sG = srcpal[*src].g; | ||
471 | sB = srcpal[*src].b; | ||
472 | DISEMBLE_RGB(dst, dstbpp, dstfmt, | ||
473 | pixel, dR, dG, dB); | ||
474 | ALPHA_BLEND(sR, sG, sB, A, dR, dG, dB); | ||
475 | ASSEMBLE_RGB(dst, dstbpp, dstfmt, dR, dG, dB); | ||
476 | } | ||
477 | src++; | ||
478 | dst += dstbpp; | ||
479 | }, | ||
480 | width); | ||
481 | src += srcskip; | ||
482 | dst += dstskip; | ||
483 | } | ||
484 | } | ||
485 | |||
486 | static SDL_loblit one_blit[] = { | ||
487 | NULL, Blit1to1, Blit1to2, Blit1to3, Blit1to4 | ||
488 | }; | ||
489 | |||
490 | static SDL_loblit one_blitkey[] = { | ||
491 | NULL, Blit1to1Key, Blit1to2Key, Blit1to3Key, Blit1to4Key | ||
492 | }; | ||
493 | |||
494 | SDL_loblit SDL_CalculateBlit1(SDL_Surface *surface, int blit_index) | ||
495 | { | ||
496 | int which; | ||
497 | SDL_PixelFormat *dstfmt; | ||
498 | |||
499 | dstfmt = surface->map->dst->format; | ||
500 | if ( dstfmt->BitsPerPixel < 8 ) { | ||
501 | which = 0; | ||
502 | } else { | ||
503 | which = dstfmt->BytesPerPixel; | ||
504 | } | ||
505 | switch(blit_index) { | ||
506 | case 0: /* copy */ | ||
507 | return one_blit[which]; | ||
508 | |||
509 | case 1: /* colorkey */ | ||
510 | return one_blitkey[which]; | ||
511 | |||
512 | case 2: /* alpha */ | ||
513 | /* Supporting 8bpp->8bpp alpha is doable but requires lots of | ||
514 | tables which consume space and takes time to precompute, | ||
515 | so is better left to the user */ | ||
516 | return which >= 2 ? Blit1toNAlpha : NULL; | ||
517 | |||
518 | case 3: /* alpha + colorkey */ | ||
519 | return which >= 2 ? Blit1toNAlphaKey : NULL; | ||
520 | |||
521 | } | ||
522 | return NULL; | ||
523 | } | ||