diff options
Diffstat (limited to 'apps/plugins/sdl/src/video/SDL_blit_0.c')
-rw-r--r-- | apps/plugins/sdl/src/video/SDL_blit_0.c | 471 |
1 files changed, 471 insertions, 0 deletions
diff --git a/apps/plugins/sdl/src/video/SDL_blit_0.c b/apps/plugins/sdl/src/video/SDL_blit_0.c new file mode 100644 index 0000000000..c1bc0eb61b --- /dev/null +++ b/apps/plugins/sdl/src/video/SDL_blit_0.c | |||
@@ -0,0 +1,471 @@ | |||
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 | |||
27 | /* Functions to blit from bitmaps to other surfaces */ | ||
28 | |||
29 | static void BlitBto1(SDL_BlitInfo *info) | ||
30 | { | ||
31 | int c; | ||
32 | int width, height; | ||
33 | Uint8 *src, *map, *dst; | ||
34 | int srcskip, dstskip; | ||
35 | |||
36 | /* Set up some basic variables */ | ||
37 | width = info->d_width; | ||
38 | height = info->d_height; | ||
39 | src = info->s_pixels; | ||
40 | srcskip = info->s_skip; | ||
41 | dst = info->d_pixels; | ||
42 | dstskip = info->d_skip; | ||
43 | map = info->table; | ||
44 | srcskip += width-(width+7)/8; | ||
45 | |||
46 | if ( map ) { | ||
47 | while ( height-- ) { | ||
48 | Uint8 byte = 0, bit; | ||
49 | for ( c=0; c<width; ++c ) { | ||
50 | if ( (c&7) == 0 ) { | ||
51 | byte = *src++; | ||
52 | } | ||
53 | bit = (byte&0x80)>>7; | ||
54 | if ( 1 ) { | ||
55 | *dst = map[bit]; | ||
56 | } | ||
57 | dst++; | ||
58 | byte <<= 1; | ||
59 | } | ||
60 | src += srcskip; | ||
61 | dst += dstskip; | ||
62 | } | ||
63 | } else { | ||
64 | while ( height-- ) { | ||
65 | Uint8 byte = 0, bit; | ||
66 | for ( c=0; c<width; ++c ) { | ||
67 | if ( (c&7) == 0 ) { | ||
68 | byte = *src++; | ||
69 | } | ||
70 | bit = (byte&0x80)>>7; | ||
71 | if ( 1 ) { | ||
72 | *dst = bit; | ||
73 | } | ||
74 | dst++; | ||
75 | byte <<= 1; | ||
76 | } | ||
77 | src += srcskip; | ||
78 | dst += dstskip; | ||
79 | } | ||
80 | } | ||
81 | } | ||
82 | static void BlitBto2(SDL_BlitInfo *info) | ||
83 | { | ||
84 | int c; | ||
85 | int width, height; | ||
86 | Uint8 *src; | ||
87 | Uint16 *map, *dst; | ||
88 | int srcskip, dstskip; | ||
89 | |||
90 | /* Set up some basic variables */ | ||
91 | width = info->d_width; | ||
92 | height = info->d_height; | ||
93 | src = info->s_pixels; | ||
94 | srcskip = info->s_skip; | ||
95 | dst = (Uint16 *)info->d_pixels; | ||
96 | dstskip = info->d_skip/2; | ||
97 | map = (Uint16 *)info->table; | ||
98 | srcskip += width-(width+7)/8; | ||
99 | |||
100 | while ( height-- ) { | ||
101 | Uint8 byte = 0, bit; | ||
102 | for ( c=0; c<width; ++c ) { | ||
103 | if ( (c&7) == 0 ) { | ||
104 | byte = *src++; | ||
105 | } | ||
106 | bit = (byte&0x80)>>7; | ||
107 | if ( 1 ) { | ||
108 | *dst = map[bit]; | ||
109 | } | ||
110 | byte <<= 1; | ||
111 | dst++; | ||
112 | } | ||
113 | src += srcskip; | ||
114 | dst += dstskip; | ||
115 | } | ||
116 | } | ||
117 | static void BlitBto3(SDL_BlitInfo *info) | ||
118 | { | ||
119 | int c, o; | ||
120 | int width, height; | ||
121 | Uint8 *src, *map, *dst; | ||
122 | int srcskip, dstskip; | ||
123 | |||
124 | /* Set up some basic variables */ | ||
125 | width = info->d_width; | ||
126 | height = info->d_height; | ||
127 | src = info->s_pixels; | ||
128 | srcskip = info->s_skip; | ||
129 | dst = info->d_pixels; | ||
130 | dstskip = info->d_skip; | ||
131 | map = info->table; | ||
132 | srcskip += width-(width+7)/8; | ||
133 | |||
134 | while ( height-- ) { | ||
135 | Uint8 byte = 0, bit; | ||
136 | for ( c=0; c<width; ++c ) { | ||
137 | if ( (c&7) == 0 ) { | ||
138 | byte = *src++; | ||
139 | } | ||
140 | bit = (byte&0x80)>>7; | ||
141 | if ( 1 ) { | ||
142 | o = bit * 4; | ||
143 | dst[0] = map[o++]; | ||
144 | dst[1] = map[o++]; | ||
145 | dst[2] = map[o++]; | ||
146 | } | ||
147 | byte <<= 1; | ||
148 | dst += 3; | ||
149 | } | ||
150 | src += srcskip; | ||
151 | dst += dstskip; | ||
152 | } | ||
153 | } | ||
154 | static void BlitBto4(SDL_BlitInfo *info) | ||
155 | { | ||
156 | int width, height; | ||
157 | Uint8 *src; | ||
158 | Uint32 *map, *dst; | ||
159 | int srcskip, dstskip; | ||
160 | int c; | ||
161 | |||
162 | /* Set up some basic variables */ | ||
163 | width = info->d_width; | ||
164 | height = info->d_height; | ||
165 | src = info->s_pixels; | ||
166 | srcskip = info->s_skip; | ||
167 | dst = (Uint32 *)info->d_pixels; | ||
168 | dstskip = info->d_skip/4; | ||
169 | map = (Uint32 *)info->table; | ||
170 | srcskip += width-(width+7)/8; | ||
171 | |||
172 | while ( height-- ) { | ||
173 | Uint8 byte = 0, bit; | ||
174 | for ( c=0; c<width; ++c ) { | ||
175 | if ( (c&7) == 0 ) { | ||
176 | byte = *src++; | ||
177 | } | ||
178 | bit = (byte&0x80)>>7; | ||
179 | if ( 1 ) { | ||
180 | *dst = map[bit]; | ||
181 | } | ||
182 | byte <<= 1; | ||
183 | dst++; | ||
184 | } | ||
185 | src += srcskip; | ||
186 | dst += dstskip; | ||
187 | } | ||
188 | } | ||
189 | |||
190 | static void BlitBto1Key(SDL_BlitInfo *info) | ||
191 | { | ||
192 | int width = info->d_width; | ||
193 | int height = info->d_height; | ||
194 | Uint8 *src = info->s_pixels; | ||
195 | Uint8 *dst = info->d_pixels; | ||
196 | int srcskip = info->s_skip; | ||
197 | int dstskip = info->d_skip; | ||
198 | Uint32 ckey = info->src->colorkey; | ||
199 | Uint8 *palmap = info->table; | ||
200 | int c; | ||
201 | |||
202 | /* Set up some basic variables */ | ||
203 | srcskip += width-(width+7)/8; | ||
204 | |||
205 | if ( palmap ) { | ||
206 | while ( height-- ) { | ||
207 | Uint8 byte = 0, bit; | ||
208 | for ( c=0; c<width; ++c ) { | ||
209 | if ( (c&7) == 0 ) { | ||
210 | byte = *src++; | ||
211 | } | ||
212 | bit = (byte&0x80)>>7; | ||
213 | if ( bit != ckey ) { | ||
214 | *dst = palmap[bit]; | ||
215 | } | ||
216 | dst++; | ||
217 | byte <<= 1; | ||
218 | } | ||
219 | src += srcskip; | ||
220 | dst += dstskip; | ||
221 | } | ||
222 | } else { | ||
223 | while ( height-- ) { | ||
224 | Uint8 byte = 0, bit; | ||
225 | for ( c=0; c<width; ++c ) { | ||
226 | if ( (c&7) == 0 ) { | ||
227 | byte = *src++; | ||
228 | } | ||
229 | bit = (byte&0x80)>>7; | ||
230 | if ( bit != ckey ) { | ||
231 | *dst = bit; | ||
232 | } | ||
233 | dst++; | ||
234 | byte <<= 1; | ||
235 | } | ||
236 | src += srcskip; | ||
237 | dst += dstskip; | ||
238 | } | ||
239 | } | ||
240 | } | ||
241 | |||
242 | static void BlitBto2Key(SDL_BlitInfo *info) | ||
243 | { | ||
244 | int width = info->d_width; | ||
245 | int height = info->d_height; | ||
246 | Uint8 *src = info->s_pixels; | ||
247 | Uint16 *dstp = (Uint16 *)info->d_pixels; | ||
248 | int srcskip = info->s_skip; | ||
249 | int dstskip = info->d_skip; | ||
250 | Uint32 ckey = info->src->colorkey; | ||
251 | Uint8 *palmap = info->table; | ||
252 | int c; | ||
253 | |||
254 | /* Set up some basic variables */ | ||
255 | srcskip += width-(width+7)/8; | ||
256 | dstskip /= 2; | ||
257 | |||
258 | while ( height-- ) { | ||
259 | Uint8 byte = 0, bit; | ||
260 | for ( c=0; c<width; ++c ) { | ||
261 | if ( (c&7) == 0 ) { | ||
262 | byte = *src++; | ||
263 | } | ||
264 | bit = (byte&0x80)>>7; | ||
265 | if ( bit != ckey ) { | ||
266 | *dstp=((Uint16 *)palmap)[bit]; | ||
267 | } | ||
268 | byte <<= 1; | ||
269 | dstp++; | ||
270 | } | ||
271 | src += srcskip; | ||
272 | dstp += dstskip; | ||
273 | } | ||
274 | } | ||
275 | |||
276 | static void BlitBto3Key(SDL_BlitInfo *info) | ||
277 | { | ||
278 | int width = info->d_width; | ||
279 | int height = info->d_height; | ||
280 | Uint8 *src = info->s_pixels; | ||
281 | Uint8 *dst = info->d_pixels; | ||
282 | int srcskip = info->s_skip; | ||
283 | int dstskip = info->d_skip; | ||
284 | Uint32 ckey = info->src->colorkey; | ||
285 | Uint8 *palmap = info->table; | ||
286 | int c; | ||
287 | |||
288 | /* Set up some basic variables */ | ||
289 | srcskip += width-(width+7)/8; | ||
290 | |||
291 | while ( height-- ) { | ||
292 | Uint8 byte = 0, bit; | ||
293 | for ( c=0; c<width; ++c ) { | ||
294 | if ( (c&7) == 0 ) { | ||
295 | byte = *src++; | ||
296 | } | ||
297 | bit = (byte&0x80)>>7; | ||
298 | if ( bit != ckey ) { | ||
299 | SDL_memcpy(dst, &palmap[bit*4], 3); | ||
300 | } | ||
301 | byte <<= 1; | ||
302 | dst += 3; | ||
303 | } | ||
304 | src += srcskip; | ||
305 | dst += dstskip; | ||
306 | } | ||
307 | } | ||
308 | |||
309 | static void BlitBto4Key(SDL_BlitInfo *info) | ||
310 | { | ||
311 | int width = info->d_width; | ||
312 | int height = info->d_height; | ||
313 | Uint8 *src = info->s_pixels; | ||
314 | Uint32 *dstp = (Uint32 *)info->d_pixels; | ||
315 | int srcskip = info->s_skip; | ||
316 | int dstskip = info->d_skip; | ||
317 | Uint32 ckey = info->src->colorkey; | ||
318 | Uint8 *palmap = info->table; | ||
319 | int c; | ||
320 | |||
321 | /* Set up some basic variables */ | ||
322 | srcskip += width-(width+7)/8; | ||
323 | dstskip /= 4; | ||
324 | |||
325 | while ( height-- ) { | ||
326 | Uint8 byte = 0, bit; | ||
327 | for ( c=0; c<width; ++c ) { | ||
328 | if ( (c&7) == 0 ) { | ||
329 | byte = *src++; | ||
330 | } | ||
331 | bit = (byte&0x80)>>7; | ||
332 | if ( bit != ckey ) { | ||
333 | *dstp=((Uint32 *)palmap)[bit]; | ||
334 | } | ||
335 | byte <<= 1; | ||
336 | dstp++; | ||
337 | } | ||
338 | src += srcskip; | ||
339 | dstp += dstskip; | ||
340 | } | ||
341 | } | ||
342 | |||
343 | static void BlitBtoNAlpha(SDL_BlitInfo *info) | ||
344 | { | ||
345 | int width = info->d_width; | ||
346 | int height = info->d_height; | ||
347 | Uint8 *src = info->s_pixels; | ||
348 | Uint8 *dst = info->d_pixels; | ||
349 | int srcskip = info->s_skip; | ||
350 | int dstskip = info->d_skip; | ||
351 | const SDL_Color *srcpal = info->src->palette->colors; | ||
352 | SDL_PixelFormat *dstfmt = info->dst; | ||
353 | int dstbpp; | ||
354 | int c; | ||
355 | const int A = info->src->alpha; | ||
356 | |||
357 | /* Set up some basic variables */ | ||
358 | dstbpp = dstfmt->BytesPerPixel; | ||
359 | srcskip += width-(width+7)/8; | ||
360 | |||
361 | while ( height-- ) { | ||
362 | Uint8 byte = 0, bit; | ||
363 | for ( c=0; c<width; ++c ) { | ||
364 | if ( (c&7) == 0 ) { | ||
365 | byte = *src++; | ||
366 | } | ||
367 | bit = (byte&0x80)>>7; | ||
368 | if ( 1 ) { | ||
369 | Uint32 pixel; | ||
370 | unsigned sR, sG, sB; | ||
371 | unsigned dR, dG, dB; | ||
372 | sR = srcpal[bit].r; | ||
373 | sG = srcpal[bit].g; | ||
374 | sB = srcpal[bit].b; | ||
375 | DISEMBLE_RGB(dst, dstbpp, dstfmt, | ||
376 | pixel, dR, dG, dB); | ||
377 | ALPHA_BLEND(sR, sG, sB, A, dR, dG, dB); | ||
378 | ASSEMBLE_RGB(dst, dstbpp, dstfmt, dR, dG, dB); | ||
379 | } | ||
380 | byte <<= 1; | ||
381 | dst += dstbpp; | ||
382 | } | ||
383 | src += srcskip; | ||
384 | dst += dstskip; | ||
385 | } | ||
386 | } | ||
387 | |||
388 | static void BlitBtoNAlphaKey(SDL_BlitInfo *info) | ||
389 | { | ||
390 | int width = info->d_width; | ||
391 | int height = info->d_height; | ||
392 | Uint8 *src = info->s_pixels; | ||
393 | Uint8 *dst = info->d_pixels; | ||
394 | int srcskip = info->s_skip; | ||
395 | int dstskip = info->d_skip; | ||
396 | SDL_PixelFormat *srcfmt = info->src; | ||
397 | SDL_PixelFormat *dstfmt = info->dst; | ||
398 | const SDL_Color *srcpal = srcfmt->palette->colors; | ||
399 | int dstbpp; | ||
400 | int c; | ||
401 | const int A = srcfmt->alpha; | ||
402 | Uint32 ckey = srcfmt->colorkey; | ||
403 | |||
404 | /* Set up some basic variables */ | ||
405 | dstbpp = dstfmt->BytesPerPixel; | ||
406 | srcskip += width-(width+7)/8; | ||
407 | |||
408 | while ( height-- ) { | ||
409 | Uint8 byte = 0, bit; | ||
410 | for ( c=0; c<width; ++c ) { | ||
411 | if ( (c&7) == 0 ) { | ||
412 | byte = *src++; | ||
413 | } | ||
414 | bit = (byte&0x80)>>7; | ||
415 | if ( bit != ckey ) { | ||
416 | int sR, sG, sB; | ||
417 | int dR, dG, dB; | ||
418 | Uint32 pixel; | ||
419 | sR = srcpal[bit].r; | ||
420 | sG = srcpal[bit].g; | ||
421 | sB = srcpal[bit].b; | ||
422 | DISEMBLE_RGB(dst, dstbpp, dstfmt, | ||
423 | pixel, dR, dG, dB); | ||
424 | ALPHA_BLEND(sR, sG, sB, A, dR, dG, dB); | ||
425 | ASSEMBLE_RGB(dst, dstbpp, dstfmt, dR, dG, dB); | ||
426 | } | ||
427 | byte <<= 1; | ||
428 | dst += dstbpp; | ||
429 | } | ||
430 | src += srcskip; | ||
431 | dst += dstskip; | ||
432 | } | ||
433 | } | ||
434 | |||
435 | static SDL_loblit bitmap_blit[] = { | ||
436 | NULL, BlitBto1, BlitBto2, BlitBto3, BlitBto4 | ||
437 | }; | ||
438 | |||
439 | static SDL_loblit colorkey_blit[] = { | ||
440 | NULL, BlitBto1Key, BlitBto2Key, BlitBto3Key, BlitBto4Key | ||
441 | }; | ||
442 | |||
443 | SDL_loblit SDL_CalculateBlit0(SDL_Surface *surface, int blit_index) | ||
444 | { | ||
445 | int which; | ||
446 | |||
447 | if ( surface->format->BitsPerPixel != 1 ) { | ||
448 | /* We don't support sub 8-bit packed pixel modes */ | ||
449 | return NULL; | ||
450 | } | ||
451 | if ( surface->map->dst->format->BitsPerPixel < 8 ) { | ||
452 | which = 0; | ||
453 | } else { | ||
454 | which = surface->map->dst->format->BytesPerPixel; | ||
455 | } | ||
456 | switch(blit_index) { | ||
457 | case 0: /* copy */ | ||
458 | return bitmap_blit[which]; | ||
459 | |||
460 | case 1: /* colorkey */ | ||
461 | return colorkey_blit[which]; | ||
462 | |||
463 | case 2: /* alpha */ | ||
464 | return which >= 2 ? BlitBtoNAlpha : NULL; | ||
465 | |||
466 | case 4: /* alpha + colorkey */ | ||
467 | return which >= 2 ? BlitBtoNAlphaKey : NULL; | ||
468 | } | ||
469 | return NULL; | ||
470 | } | ||
471 | |||