src/video/SDL_yuv_sw.c
/* [<][>][^][v][top][bottom][index][help] */
FUNCTIONS
This source file includes following functions.
- CPU_Flags
- CPU_Flags
- Color16DitherYV12Mod1X
- Color24DitherYV12Mod1X
- Color32DitherYV12Mod1X
- Color16DitherYV12Mod2X
- Color24DitherYV12Mod2X
- Color32DitherYV12Mod2X
- Color16DitherYUY2Mod1X
- Color24DitherYUY2Mod1X
- Color32DitherYUY2Mod1X
- Color16DitherYUY2Mod2X
- Color24DitherYUY2Mod2X
- Color32DitherYUY2Mod2X
- number_of_bits_set
- free_bits_at_bottom
- SDL_CreateYUV_SW
- SDL_LockYUV_SW
- SDL_UnlockYUV_SW
- SDL_DisplayYUV_SW
- SDL_FreeYUV_SW
1 /*
2 SDL - Simple DirectMedia Layer
3 Copyright (C) 1997, 1998, 1999, 2000, 2001 Sam Lantinga
4
5 This library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Library General Public
7 License as published by the Free Software Foundation; either
8 version 2 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 Library General Public License for more details.
14
15 You should have received a copy of the GNU Library General Public
16 License along with this library; if not, write to the Free
17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18
19 Sam Lantinga
20 slouken@devolution.com
21 */
22
23 #ifdef SAVE_RCSID
24 static char rcsid =
25 "@(#) $Id: SDL_yuv_sw.c,v 1.1.2.14 2001/02/22 00:21:51 hercules Exp $";
26 #endif
27
28 /* This is the software implementation of the YUV video overlay support */
29
30 /* This code was derived from code carrying the following copyright notices:
31
32 * Copyright (c) 1995 The Regents of the University of California.
33 * All rights reserved.
34 *
35 * Permission to use, copy, modify, and distribute this software and its
36 * documentation for any purpose, without fee, and without written agreement is
37 * hereby granted, provided that the above copyright notice and the following
38 * two paragraphs appear in all copies of this software.
39 *
40 * IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR
41 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT
42 * OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE UNIVERSITY OF
43 * CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
44 *
45 * THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES,
46 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
47 * AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
48 * ON AN "AS IS" BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATION TO
49 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
50
51 * Copyright (c) 1995 Erik Corry
52 * All rights reserved.
53 *
54 * Permission to use, copy, modify, and distribute this software and its
55 * documentation for any purpose, without fee, and without written agreement is
56 * hereby granted, provided that the above copyright notice and the following
57 * two paragraphs appear in all copies of this software.
58 *
59 * IN NO EVENT SHALL ERIK CORRY BE LIABLE TO ANY PARTY FOR DIRECT, INDIRECT,
60 * SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OF
61 * THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF ERIK CORRY HAS BEEN ADVISED
62 * OF THE POSSIBILITY OF SUCH DAMAGE.
63 *
64 * ERIK CORRY SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, BUT NOT
65 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
66 * PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS ON AN "AS IS"
67 * BASIS, AND ERIK CORRY HAS NO OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT,
68 * UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
69
70 * Portions of this software Copyright (c) 1995 Brown University.
71 * All rights reserved.
72 *
73 * Permission to use, copy, modify, and distribute this software and its
74 * documentation for any purpose, without fee, and without written agreement
75 * is hereby granted, provided that the above copyright notice and the
76 * following two paragraphs appear in all copies of this software.
77 *
78 * IN NO EVENT SHALL BROWN UNIVERSITY BE LIABLE TO ANY PARTY FOR
79 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT
80 * OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF BROWN
81 * UNIVERSITY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
82 *
83 * BROWN UNIVERSITY SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, BUT NOT
84 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
85 * PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS ON AN "AS IS"
86 * BASIS, AND BROWN UNIVERSITY HAS NO OBLIGATION TO PROVIDE MAINTENANCE,
87 * SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
88 */
89
90 #include <stdlib.h>
91 #include <string.h>
92
93 #include "SDL_error.h"
94 #include "SDL_video.h"
95 #include "SDL_stretch_c.h"
96 #include "SDL_yuvfuncs.h"
97 #include "SDL_yuv_sw_c.h"
98
99 /* Function to check the CPU flags */
100 #define MMX_CPU 0x800000
101 #ifdef USE_ASMBLIT
102 #define CPU_Flags() Hermes_X86_CPU()
/* [<][>][^][v][top][bottom][index][help] */
103 #else
104 #define CPU_Flags() 0L
/* [<][>][^][v][top][bottom][index][help] */
105 #endif
106
107 #ifdef USE_ASMBLIT
108 #define X86_ASSEMBLER
109 #define HermesConverterInterface void
110 #define HermesClearInterface void
111 #define STACKCALL
112 typedef Uint32 int32;
113
114 #include "HeadX86.h"
115 #endif
116
117 /* The functions used to manipulate software video overlays */
118 static struct private_yuvhwfuncs sw_yuvfuncs = {
119 SDL_LockYUV_SW,
120 SDL_UnlockYUV_SW,
121 SDL_DisplayYUV_SW,
122 SDL_FreeYUV_SW
123 };
124
125 /* RGB conversion lookup tables */
126 struct private_yuvhwdata {
127 SDL_Surface *stretch;
128 SDL_Surface *display;
129 Uint8 *pixels;
130 int *colortab;
131 Uint32 *rgb_2_pix;
132 void (*Display1X)(int *colortab, Uint32 *rgb_2_pix,
133 unsigned char *lum, unsigned char *cr,
134 unsigned char *cb, unsigned char *out,
135 int rows, int cols, int mod );
136 void (*Display2X)(int *colortab, Uint32 *rgb_2_pix,
137 unsigned char *lum, unsigned char *cr,
138 unsigned char *cb, unsigned char *out,
139 int rows, int cols, int mod );
140
141 /* These are just so we don't have to allocate them separately */
142 Uint16 pitches[3];
143 Uint8 *planes[3];
144 };
145
146
147 /* The colorspace conversion functions */
148
149 extern void Color565DitherYV12MMX1X( int *colortab, Uint32 *rgb_2_pix,
150 unsigned char *lum, unsigned char *cr,
151 unsigned char *cb, unsigned char *out,
152 int rows, int cols, int mod );
153 extern void ColorRGBDitherYV12MMX1X( int *colortab, Uint32 *rgb_2_pix,
154 unsigned char *lum, unsigned char *cr,
155 unsigned char *cb, unsigned char *out,
156 int rows, int cols, int mod );
157
158 static void Color16DitherYV12Mod1X( int *colortab, Uint32 *rgb_2_pix,
/* [<][>][^][v][top][bottom][index][help] */
159 unsigned char *lum, unsigned char *cr,
160 unsigned char *cb, unsigned char *out,
161 int rows, int cols, int mod )
162 {
163 unsigned short* row1;
164 unsigned short* row2;
165 unsigned char* lum2;
166 int x, y;
167 int cr_r;
168 int crb_g;
169 int cb_b;
170 int cols_2 = cols / 2;
171
172 row1 = (unsigned short*) out;
173 row2 = row1 + cols + mod;
174 lum2 = lum + cols;
175
176 mod += cols + mod;
177
178 y = rows / 2;
179 while( y-- )
180 {
181 x = cols_2;
182 while( x-- )
183 {
184 register int L;
185
186 cr_r = 0*768+256 + colortab[ *cr + 0*256 ];
187 crb_g = 1*768+256 + colortab[ *cr + 1*256 ]
188 + colortab[ *cb + 2*256 ];
189 cb_b = 2*768+256 + colortab[ *cb + 3*256 ];
190 ++cr; ++cb;
191
192 L = *lum++;
193 *row1++ = (rgb_2_pix[ L + cr_r ] |
194 rgb_2_pix[ L + crb_g ] |
195 rgb_2_pix[ L + cb_b ]);
196
197 L = *lum++;
198 *row1++ = (rgb_2_pix[ L + cr_r ] |
199 rgb_2_pix[ L + crb_g ] |
200 rgb_2_pix[ L + cb_b ]);
201
202
203 /* Now, do second row. */
204
205 L = *lum2++;
206 *row2++ = (rgb_2_pix[ L + cr_r ] |
207 rgb_2_pix[ L + crb_g ] |
208 rgb_2_pix[ L + cb_b ]);
209
210 L = *lum2++;
211 *row2++ = (rgb_2_pix[ L + cr_r ] |
212 rgb_2_pix[ L + crb_g ] |
213 rgb_2_pix[ L + cb_b ]);
214 }
215
216 /*
217 * These values are at the start of the next line, (due
218 * to the ++'s above),but they need to be at the start
219 * of the line after that.
220 */
221 lum += cols;
222 lum2 += cols;
223 row1 += mod;
224 row2 += mod;
225 }
226 }
227
228 static void Color24DitherYV12Mod1X( int *colortab, Uint32 *rgb_2_pix,
/* [<][>][^][v][top][bottom][index][help] */
229 unsigned char *lum, unsigned char *cr,
230 unsigned char *cb, unsigned char *out,
231 int rows, int cols, int mod )
232 {
233 unsigned int value;
234 unsigned char* row1;
235 unsigned char* row2;
236 unsigned char* lum2;
237 int x, y;
238 int cr_r;
239 int crb_g;
240 int cb_b;
241 int cols_2 = cols / 2;
242
243 row1 = out;
244 row2 = row1 + cols*3 + mod*3;
245 lum2 = lum + cols;
246
247 mod += cols + mod;
248 mod *= 3;
249
250 y = rows / 2;
251 while( y-- )
252 {
253 x = cols_2;
254 while( x-- )
255 {
256 register int L;
257
258 cr_r = 0*768+256 + colortab[ *cr + 0*256 ];
259 crb_g = 1*768+256 + colortab[ *cr + 1*256 ]
260 + colortab[ *cb + 2*256 ];
261 cb_b = 2*768+256 + colortab[ *cb + 3*256 ];
262 ++cr; ++cb;
263
264 L = *lum++;
265 value = (rgb_2_pix[ L + cr_r ] |
266 rgb_2_pix[ L + crb_g ] |
267 rgb_2_pix[ L + cb_b ]);
268 *row1++ = (value ) & 0xFF;
269 *row1++ = (value >> 8) & 0xFF;
270 *row1++ = (value >> 16) & 0xFF;
271
272 L = *lum++;
273 value = (rgb_2_pix[ L + cr_r ] |
274 rgb_2_pix[ L + crb_g ] |
275 rgb_2_pix[ L + cb_b ]);
276 *row1++ = (value ) & 0xFF;
277 *row1++ = (value >> 8) & 0xFF;
278 *row1++ = (value >> 16) & 0xFF;
279
280
281 /* Now, do second row. */
282
283 L = *lum2++;
284 value = (rgb_2_pix[ L + cr_r ] |
285 rgb_2_pix[ L + crb_g ] |
286 rgb_2_pix[ L + cb_b ]);
287 *row2++ = (value ) & 0xFF;
288 *row2++ = (value >> 8) & 0xFF;
289 *row2++ = (value >> 16) & 0xFF;
290
291 L = *lum2++;
292 value = (rgb_2_pix[ L + cr_r ] |
293 rgb_2_pix[ L + crb_g ] |
294 rgb_2_pix[ L + cb_b ]);
295 *row2++ = (value ) & 0xFF;
296 *row2++ = (value >> 8) & 0xFF;
297 *row2++ = (value >> 16) & 0xFF;
298 }
299
300 /*
301 * These values are at the start of the next line, (due
302 * to the ++'s above),but they need to be at the start
303 * of the line after that.
304 */
305 lum += cols;
306 lum2 += cols;
307 row1 += mod;
308 row2 += mod;
309 }
310 }
311
312 static void Color32DitherYV12Mod1X( int *colortab, Uint32 *rgb_2_pix,
/* [<][>][^][v][top][bottom][index][help] */
313 unsigned char *lum, unsigned char *cr,
314 unsigned char *cb, unsigned char *out,
315 int rows, int cols, int mod )
316 {
317 unsigned int* row1;
318 unsigned int* row2;
319 unsigned char* lum2;
320 int x, y;
321 int cr_r;
322 int crb_g;
323 int cb_b;
324 int cols_2 = cols / 2;
325
326 row1 = (unsigned int*) out;
327 row2 = row1 + cols + mod;
328 lum2 = lum + cols;
329
330 mod += cols + mod;
331
332 y = rows / 2;
333 while( y-- )
334 {
335 x = cols_2;
336 while( x-- )
337 {
338 register int L;
339
340 cr_r = 0*768+256 + colortab[ *cr + 0*256 ];
341 crb_g = 1*768+256 + colortab[ *cr + 1*256 ]
342 + colortab[ *cb + 2*256 ];
343 cb_b = 2*768+256 + colortab[ *cb + 3*256 ];
344 ++cr; ++cb;
345
346 L = *lum++;
347 *row1++ = (rgb_2_pix[ L + cr_r ] |
348 rgb_2_pix[ L + crb_g ] |
349 rgb_2_pix[ L + cb_b ]);
350
351 L = *lum++;
352 *row1++ = (rgb_2_pix[ L + cr_r ] |
353 rgb_2_pix[ L + crb_g ] |
354 rgb_2_pix[ L + cb_b ]);
355
356
357 /* Now, do second row. */
358
359 L = *lum2++;
360 *row2++ = (rgb_2_pix[ L + cr_r ] |
361 rgb_2_pix[ L + crb_g ] |
362 rgb_2_pix[ L + cb_b ]);
363
364 L = *lum2++;
365 *row2++ = (rgb_2_pix[ L + cr_r ] |
366 rgb_2_pix[ L + crb_g ] |
367 rgb_2_pix[ L + cb_b ]);
368 }
369
370 /*
371 * These values are at the start of the next line, (due
372 * to the ++'s above),but they need to be at the start
373 * of the line after that.
374 */
375 lum += cols;
376 lum2 += cols;
377 row1 += mod;
378 row2 += mod;
379 }
380 }
381
382 /*
383 * In this function I make use of a nasty trick. The tables have the lower
384 * 16 bits replicated in the upper 16. This means I can write ints and get
385 * the horisontal doubling for free (almost).
386 */
387 static void Color16DitherYV12Mod2X( int *colortab, Uint32 *rgb_2_pix,
/* [<][>][^][v][top][bottom][index][help] */
388 unsigned char *lum, unsigned char *cr,
389 unsigned char *cb, unsigned char *out,
390 int rows, int cols, int mod )
391 {
392 unsigned int* row1 = (unsigned int*) out;
393 const int next_row = cols+(mod/2);
394 unsigned int* row2 = row1 + 2*next_row;
395 unsigned char* lum2;
396 int x, y;
397 int cr_r;
398 int crb_g;
399 int cb_b;
400 int cols_2 = cols / 2;
401
402 lum2 = lum + cols;
403
404 mod = (next_row * 3) + (mod/2);
405
406 y = rows / 2;
407 while( y-- )
408 {
409 x = cols_2;
410 while( x-- )
411 {
412 register int L;
413
414 cr_r = 0*768+256 + colortab[ *cr + 0*256 ];
415 crb_g = 1*768+256 + colortab[ *cr + 1*256 ]
416 + colortab[ *cb + 2*256 ];
417 cb_b = 2*768+256 + colortab[ *cb + 3*256 ];
418 ++cr; ++cb;
419
420 L = *lum++;
421 row1[0] = row1[next_row] = (rgb_2_pix[ L + cr_r ] |
422 rgb_2_pix[ L + crb_g ] |
423 rgb_2_pix[ L + cb_b ]);
424 row1++;
425
426 L = *lum++;
427 row1[0] = row1[next_row] = (rgb_2_pix[ L + cr_r ] |
428 rgb_2_pix[ L + crb_g ] |
429 rgb_2_pix[ L + cb_b ]);
430 row1++;
431
432
433 /* Now, do second row. */
434
435 L = *lum2++;
436 row2[0] = row2[next_row] = (rgb_2_pix[ L + cr_r ] |
437 rgb_2_pix[ L + crb_g ] |
438 rgb_2_pix[ L + cb_b ]);
439 row2++;
440
441 L = *lum2++;
442 row2[0] = row2[next_row] = (rgb_2_pix[ L + cr_r ] |
443 rgb_2_pix[ L + crb_g ] |
444 rgb_2_pix[ L + cb_b ]);
445 row2++;
446 }
447
448 /*
449 * These values are at the start of the next line, (due
450 * to the ++'s above),but they need to be at the start
451 * of the line after that.
452 */
453 lum += cols;
454 lum2 += cols;
455 row1 += mod;
456 row2 += mod;
457 }
458 }
459
460 static void Color24DitherYV12Mod2X( int *colortab, Uint32 *rgb_2_pix,
/* [<][>][^][v][top][bottom][index][help] */
461 unsigned char *lum, unsigned char *cr,
462 unsigned char *cb, unsigned char *out,
463 int rows, int cols, int mod )
464 {
465 unsigned int value;
466 unsigned char* row1 = out;
467 const int next_row = (cols*2 + mod) * 3;
468 unsigned char* row2 = row1 + 2*next_row;
469 unsigned char* lum2;
470 int x, y;
471 int cr_r;
472 int crb_g;
473 int cb_b;
474 int cols_2 = cols / 2;
475
476 lum2 = lum + cols;
477
478 mod = next_row*3 + mod*3;
479
480 y = rows / 2;
481 while( y-- )
482 {
483 x = cols_2;
484 while( x-- )
485 {
486 register int L;
487
488 cr_r = 0*768+256 + colortab[ *cr + 0*256 ];
489 crb_g = 1*768+256 + colortab[ *cr + 1*256 ]
490 + colortab[ *cb + 2*256 ];
491 cb_b = 2*768+256 + colortab[ *cb + 3*256 ];
492 ++cr; ++cb;
493
494 L = *lum++;
495 value = (rgb_2_pix[ L + cr_r ] |
496 rgb_2_pix[ L + crb_g ] |
497 rgb_2_pix[ L + cb_b ]);
498 row1[0+0] = row1[3+0] = row1[next_row+0] = row1[next_row+3+0] =
499 (value ) & 0xFF;
500 row1[0+1] = row1[3+1] = row1[next_row+1] = row1[next_row+3+1] =
501 (value >> 8) & 0xFF;
502 row1[0+2] = row1[3+2] = row1[next_row+2] = row1[next_row+3+2] =
503 (value >> 16) & 0xFF;
504 row1 += 2*3;
505
506 L = *lum++;
507 value = (rgb_2_pix[ L + cr_r ] |
508 rgb_2_pix[ L + crb_g ] |
509 rgb_2_pix[ L + cb_b ]);
510 row1[0+0] = row1[3+0] = row1[next_row+0] = row1[next_row+3+0] =
511 (value ) & 0xFF;
512 row1[0+1] = row1[3+1] = row1[next_row+1] = row1[next_row+3+1] =
513 (value >> 8) & 0xFF;
514 row1[0+2] = row1[3+2] = row1[next_row+2] = row1[next_row+3+2] =
515 (value >> 16) & 0xFF;
516 row1 += 2*3;
517
518
519 /* Now, do second row. */
520
521 L = *lum2++;
522 value = (rgb_2_pix[ L + cr_r ] |
523 rgb_2_pix[ L + crb_g ] |
524 rgb_2_pix[ L + cb_b ]);
525 row2[0+0] = row2[3+0] = row2[next_row+0] = row2[next_row+3+0] =
526 (value ) & 0xFF;
527 row2[0+1] = row2[3+1] = row2[next_row+1] = row2[next_row+3+1] =
528 (value >> 8) & 0xFF;
529 row2[0+2] = row2[3+2] = row2[next_row+2] = row2[next_row+3+2] =
530 (value >> 16) & 0xFF;
531 row2 += 2*3;
532
533 L = *lum2++;
534 value = (rgb_2_pix[ L + cr_r ] |
535 rgb_2_pix[ L + crb_g ] |
536 rgb_2_pix[ L + cb_b ]);
537 row2[0+0] = row2[3+0] = row2[next_row+0] = row2[next_row+3+0] =
538 (value ) & 0xFF;
539 row2[0+1] = row2[3+1] = row2[next_row+1] = row2[next_row+3+1] =
540 (value >> 8) & 0xFF;
541 row2[0+2] = row2[3+2] = row2[next_row+2] = row2[next_row+3+2] =
542 (value >> 16) & 0xFF;
543 row2 += 2*3;
544 }
545
546 /*
547 * These values are at the start of the next line, (due
548 * to the ++'s above),but they need to be at the start
549 * of the line after that.
550 */
551 lum += cols;
552 lum2 += cols;
553 row1 += mod;
554 row2 += mod;
555 }
556 }
557
558 static void Color32DitherYV12Mod2X( int *colortab, Uint32 *rgb_2_pix,
/* [<][>][^][v][top][bottom][index][help] */
559 unsigned char *lum, unsigned char *cr,
560 unsigned char *cb, unsigned char *out,
561 int rows, int cols, int mod )
562 {
563 unsigned int* row1 = (unsigned int*) out;
564 const int next_row = cols*2+mod;
565 unsigned int* row2 = row1 + 2*next_row;
566 unsigned char* lum2;
567 int x, y;
568 int cr_r;
569 int crb_g;
570 int cb_b;
571 int cols_2 = cols / 2;
572
573 lum2 = lum + cols;
574
575 mod = (next_row * 3) + mod;
576
577 y = rows / 2;
578 while( y-- )
579 {
580 x = cols_2;
581 while( x-- )
582 {
583 register int L;
584
585 cr_r = 0*768+256 + colortab[ *cr + 0*256 ];
586 crb_g = 1*768+256 + colortab[ *cr + 1*256 ]
587 + colortab[ *cb + 2*256 ];
588 cb_b = 2*768+256 + colortab[ *cb + 3*256 ];
589 ++cr; ++cb;
590
591 L = *lum++;
592 row1[0] = row1[1] = row1[next_row] = row1[next_row+1] =
593 (rgb_2_pix[ L + cr_r ] |
594 rgb_2_pix[ L + crb_g ] |
595 rgb_2_pix[ L + cb_b ]);
596 row1 += 2;
597
598 L = *lum++;
599 row1[0] = row1[1] = row1[next_row] = row1[next_row+1] =
600 (rgb_2_pix[ L + cr_r ] |
601 rgb_2_pix[ L + crb_g ] |
602 rgb_2_pix[ L + cb_b ]);
603 row1 += 2;
604
605
606 /* Now, do second row. */
607
608 L = *lum2++;
609 row2[0] = row2[1] = row2[next_row] = row2[next_row+1] =
610 (rgb_2_pix[ L + cr_r ] |
611 rgb_2_pix[ L + crb_g ] |
612 rgb_2_pix[ L + cb_b ]);
613 row2 += 2;
614
615 L = *lum2++;
616 row2[0] = row2[1] = row2[next_row] = row2[next_row+1] =
617 (rgb_2_pix[ L + cr_r ] |
618 rgb_2_pix[ L + crb_g ] |
619 rgb_2_pix[ L + cb_b ]);
620 row2 += 2;
621 }
622
623 /*
624 * These values are at the start of the next line, (due
625 * to the ++'s above),but they need to be at the start
626 * of the line after that.
627 */
628 lum += cols;
629 lum2 += cols;
630 row1 += mod;
631 row2 += mod;
632 }
633 }
634
635 static void Color16DitherYUY2Mod1X( int *colortab, Uint32 *rgb_2_pix,
/* [<][>][^][v][top][bottom][index][help] */
636 unsigned char *lum, unsigned char *cr,
637 unsigned char *cb, unsigned char *out,
638 int rows, int cols, int mod )
639 {
640 unsigned short* row;
641 int x, y;
642 int cr_r;
643 int crb_g;
644 int cb_b;
645 int cols_2 = cols / 2;
646
647 row = (unsigned short*) out;
648
649 y = rows;
650 while( y-- )
651 {
652 x = cols_2;
653 while( x-- )
654 {
655 register int L;
656
657 cr_r = 0*768+256 + colortab[ *cr + 0*256 ];
658 crb_g = 1*768+256 + colortab[ *cr + 1*256 ]
659 + colortab[ *cb + 2*256 ];
660 cb_b = 2*768+256 + colortab[ *cb + 3*256 ];
661 cr += 4; cb += 4;
662
663 L = *lum; lum += 2;
664 *row++ = (rgb_2_pix[ L + cr_r ] |
665 rgb_2_pix[ L + crb_g ] |
666 rgb_2_pix[ L + cb_b ]);
667
668 L = *lum; lum += 2;
669 *row++ = (rgb_2_pix[ L + cr_r ] |
670 rgb_2_pix[ L + crb_g ] |
671 rgb_2_pix[ L + cb_b ]);
672
673 }
674
675 row += mod;
676 }
677 }
678
679 static void Color24DitherYUY2Mod1X( int *colortab, Uint32 *rgb_2_pix,
/* [<][>][^][v][top][bottom][index][help] */
680 unsigned char *lum, unsigned char *cr,
681 unsigned char *cb, unsigned char *out,
682 int rows, int cols, int mod )
683 {
684 unsigned int value;
685 unsigned char* row;
686 int x, y;
687 int cr_r;
688 int crb_g;
689 int cb_b;
690 int cols_2 = cols / 2;
691
692 row = (unsigned char*) out;
693 mod *= 3;
694 y = rows;
695 while( y-- )
696 {
697 x = cols_2;
698 while( x-- )
699 {
700 register int L;
701
702 cr_r = 0*768+256 + colortab[ *cr + 0*256 ];
703 crb_g = 1*768+256 + colortab[ *cr + 1*256 ]
704 + colortab[ *cb + 2*256 ];
705 cb_b = 2*768+256 + colortab[ *cb + 3*256 ];
706 cr += 4; cb += 4;
707
708 L = *lum; lum += 2;
709 value = (rgb_2_pix[ L + cr_r ] |
710 rgb_2_pix[ L + crb_g ] |
711 rgb_2_pix[ L + cb_b ]);
712 *row++ = (value ) & 0xFF;
713 *row++ = (value >> 8) & 0xFF;
714 *row++ = (value >> 16) & 0xFF;
715
716 L = *lum; lum += 2;
717 value = (rgb_2_pix[ L + cr_r ] |
718 rgb_2_pix[ L + crb_g ] |
719 rgb_2_pix[ L + cb_b ]);
720 *row++ = (value ) & 0xFF;
721 *row++ = (value >> 8) & 0xFF;
722 *row++ = (value >> 16) & 0xFF;
723
724 }
725 row += mod;
726 }
727 }
728
729 static void Color32DitherYUY2Mod1X( int *colortab, Uint32 *rgb_2_pix,
/* [<][>][^][v][top][bottom][index][help] */
730 unsigned char *lum, unsigned char *cr,
731 unsigned char *cb, unsigned char *out,
732 int rows, int cols, int mod )
733 {
734 unsigned int* row;
735 int x, y;
736 int cr_r;
737 int crb_g;
738 int cb_b;
739 int cols_2 = cols / 2;
740
741 row = (unsigned int*) out;
742 y = rows;
743 while( y-- )
744 {
745 x = cols_2;
746 while( x-- )
747 {
748 register int L;
749
750 cr_r = 0*768+256 + colortab[ *cr + 0*256 ];
751 crb_g = 1*768+256 + colortab[ *cr + 1*256 ]
752 + colortab[ *cb + 2*256 ];
753 cb_b = 2*768+256 + colortab[ *cb + 3*256 ];
754 cr += 4; cb += 4;
755
756 L = *lum; lum += 2;
757 *row++ = (rgb_2_pix[ L + cr_r ] |
758 rgb_2_pix[ L + crb_g ] |
759 rgb_2_pix[ L + cb_b ]);
760
761 L = *lum; lum += 2;
762 *row++ = (rgb_2_pix[ L + cr_r ] |
763 rgb_2_pix[ L + crb_g ] |
764 rgb_2_pix[ L + cb_b ]);
765
766
767 }
768 row += mod;
769 }
770 }
771
772 /*
773 * In this function I make use of a nasty trick. The tables have the lower
774 * 16 bits replicated in the upper 16. This means I can write ints and get
775 * the horisontal doubling for free (almost).
776 */
777 static void Color16DitherYUY2Mod2X( int *colortab, Uint32 *rgb_2_pix,
/* [<][>][^][v][top][bottom][index][help] */
778 unsigned char *lum, unsigned char *cr,
779 unsigned char *cb, unsigned char *out,
780 int rows, int cols, int mod )
781 {
782 unsigned int* row = (unsigned int*) out;
783 const int next_row = cols+(mod/2);
784 int x, y;
785 int cr_r;
786 int crb_g;
787 int cb_b;
788 int cols_2 = cols / 2;
789
790 y = rows;
791 while( y-- )
792 {
793 x = cols_2;
794 while( x-- )
795 {
796 register int L;
797
798 cr_r = 0*768+256 + colortab[ *cr + 0*256 ];
799 crb_g = 1*768+256 + colortab[ *cr + 1*256 ]
800 + colortab[ *cb + 2*256 ];
801 cb_b = 2*768+256 + colortab[ *cb + 3*256 ];
802 cr += 4; cb += 4;
803
804 L = *lum; lum += 2;
805 row[0] = row[next_row] = (rgb_2_pix[ L + cr_r ] |
806 rgb_2_pix[ L + crb_g ] |
807 rgb_2_pix[ L + cb_b ]);
808 row++;
809
810 L = *lum; lum += 2;
811 row[0] = row[next_row] = (rgb_2_pix[ L + cr_r ] |
812 rgb_2_pix[ L + crb_g ] |
813 rgb_2_pix[ L + cb_b ]);
814 row++;
815
816 }
817 row += next_row;
818 }
819 }
820
821 static void Color24DitherYUY2Mod2X( int *colortab, Uint32 *rgb_2_pix,
/* [<][>][^][v][top][bottom][index][help] */
822 unsigned char *lum, unsigned char *cr,
823 unsigned char *cb, unsigned char *out,
824 int rows, int cols, int mod )
825 {
826 unsigned int value;
827 unsigned char* row = out;
828 const int next_row = (cols*2 + mod) * 3;
829 int x, y;
830 int cr_r;
831 int crb_g;
832 int cb_b;
833 int cols_2 = cols / 2;
834 y = rows;
835 while( y-- )
836 {
837 x = cols_2;
838 while( x-- )
839 {
840 register int L;
841
842 cr_r = 0*768+256 + colortab[ *cr + 0*256 ];
843 crb_g = 1*768+256 + colortab[ *cr + 1*256 ]
844 + colortab[ *cb + 2*256 ];
845 cb_b = 2*768+256 + colortab[ *cb + 3*256 ];
846 cr += 4; cb += 4;
847
848 L = *lum; lum += 2;
849 value = (rgb_2_pix[ L + cr_r ] |
850 rgb_2_pix[ L + crb_g ] |
851 rgb_2_pix[ L + cb_b ]);
852 row[0+0] = row[3+0] = row[next_row+0] = row[next_row+3+0] =
853 (value ) & 0xFF;
854 row[0+1] = row[3+1] = row[next_row+1] = row[next_row+3+1] =
855 (value >> 8) & 0xFF;
856 row[0+2] = row[3+2] = row[next_row+2] = row[next_row+3+2] =
857 (value >> 16) & 0xFF;
858 row += 2*3;
859
860 L = *lum; lum += 2;
861 value = (rgb_2_pix[ L + cr_r ] |
862 rgb_2_pix[ L + crb_g ] |
863 rgb_2_pix[ L + cb_b ]);
864 row[0+0] = row[3+0] = row[next_row+0] = row[next_row+3+0] =
865 (value ) & 0xFF;
866 row[0+1] = row[3+1] = row[next_row+1] = row[next_row+3+1] =
867 (value >> 8) & 0xFF;
868 row[0+2] = row[3+2] = row[next_row+2] = row[next_row+3+2] =
869 (value >> 16) & 0xFF;
870 row += 2*3;
871
872 }
873 row += next_row;
874 }
875 }
876
877 static void Color32DitherYUY2Mod2X( int *colortab, Uint32 *rgb_2_pix,
/* [<][>][^][v][top][bottom][index][help] */
878 unsigned char *lum, unsigned char *cr,
879 unsigned char *cb, unsigned char *out,
880 int rows, int cols, int mod )
881 {
882 unsigned int* row = (unsigned int*) out;
883 const int next_row = cols*2+mod;
884 int x, y;
885 int cr_r;
886 int crb_g;
887 int cb_b;
888 int cols_2 = cols / 2;
889 mod+=mod;
890 y = rows;
891 while( y-- )
892 {
893 x = cols_2;
894 while( x-- )
895 {
896 register int L;
897
898 cr_r = 0*768+256 + colortab[ *cr + 0*256 ];
899 crb_g = 1*768+256 + colortab[ *cr + 1*256 ]
900 + colortab[ *cb + 2*256 ];
901 cb_b = 2*768+256 + colortab[ *cb + 3*256 ];
902 cr += 4; cb += 4;
903
904 L = *lum; lum += 2;
905 row[0] = row[1] = row[next_row] = row[next_row+1] =
906 (rgb_2_pix[ L + cr_r ] |
907 rgb_2_pix[ L + crb_g ] |
908 rgb_2_pix[ L + cb_b ]);
909 row += 2;
910
911 L = *lum; lum += 2;
912 row[0] = row[1] = row[next_row] = row[next_row+1] =
913 (rgb_2_pix[ L + cr_r ] |
914 rgb_2_pix[ L + crb_g ] |
915 rgb_2_pix[ L + cb_b ]);
916 row += 2;
917
918
919 }
920
921 row += next_row;
922 }
923 }
924
925 /*
926 * How many 1 bits are there in the Uint32.
927 * Low performance, do not call often.
928 */
929 static int number_of_bits_set( Uint32 a )
/* [<][>][^][v][top][bottom][index][help] */
930 {
931 if(!a) return 0;
932 if(a & 1) return 1 + number_of_bits_set(a >> 1);
933 return(number_of_bits_set(a >> 1));
934 }
935
936 /*
937 * How many 0 bits are there at least significant end of Uint32.
938 * Low performance, do not call often.
939 */
940 static int free_bits_at_bottom( Uint32 a )
/* [<][>][^][v][top][bottom][index][help] */
941 {
942 /* assume char is 8 bits */
943 if(!a) return sizeof(Uint32) * 8;
944 if(((Sint32)a) & 1l) return 0;
945 return 1 + free_bits_at_bottom ( a >> 1);
946 }
947
948
949 SDL_Overlay *SDL_CreateYUV_SW(_THIS, int width, int height, Uint32 format, SDL_Surface *display)
/* [<][>][^][v][top][bottom][index][help] */
950 {
951 SDL_Overlay *overlay;
952 struct private_yuvhwdata *swdata;
953 int *Cr_r_tab;
954 int *Cr_g_tab;
955 int *Cb_g_tab;
956 int *Cb_b_tab;
957 Uint32 *r_2_pix_alloc;
958 Uint32 *g_2_pix_alloc;
959 Uint32 *b_2_pix_alloc;
960 int i, cpu_mmx;
961 int CR, CB;
962 Uint32 Rmask, Gmask, Bmask;
963
964 /* Only RGB packed pixel conversion supported */
965 if ( (display->format->BytesPerPixel != 2) &&
966 (display->format->BytesPerPixel != 3) &&
967 (display->format->BytesPerPixel != 4) ) {
968 SDL_SetError("Can't use YUV data on non 16/24/32 bit surfaces");
969 return(NULL);
970 }
971
972 /* Verify that we support the format */
973 switch (format) {
974 case SDL_YV12_OVERLAY:
975 case SDL_IYUV_OVERLAY:
976 case SDL_YUY2_OVERLAY:
977 case SDL_UYVY_OVERLAY:
978 case SDL_YVYU_OVERLAY:
979 break;
980 default:
981 SDL_SetError("Unsupported YUV format");
982 return(NULL);
983 }
984
985 /* Create the overlay structure */
986 overlay = (SDL_Overlay *)malloc(sizeof *overlay);
987 if ( overlay == NULL ) {
988 SDL_OutOfMemory();
989 return(NULL);
990 }
991 memset(overlay, 0, (sizeof *overlay));
992
993 /* Fill in the basic members */
994 overlay->format = format;
995 overlay->w = width;
996 overlay->h = height;
997
998 /* Set up the YUV surface function structure */
999 overlay->hwfuncs = &sw_yuvfuncs;
1000
1001 /* Create the pixel data and lookup tables */
1002 swdata = (struct private_yuvhwdata *)malloc(sizeof *swdata);
1003 overlay->hwdata = swdata;
1004 if ( swdata == NULL ) {
1005 SDL_OutOfMemory();
1006 SDL_FreeYUVOverlay(overlay);
1007 return(NULL);
1008 }
1009 swdata->stretch = NULL;
1010 swdata->display = display;
1011 swdata->pixels = (Uint8 *) malloc(width*height*2);
1012 swdata->colortab = (int *)malloc(4*256*sizeof(int));
1013 Cr_r_tab = &swdata->colortab[0*256];
1014 Cr_g_tab = &swdata->colortab[1*256];
1015 Cb_g_tab = &swdata->colortab[2*256];
1016 Cb_b_tab = &swdata->colortab[3*256];
1017 swdata->rgb_2_pix = (Uint32 *)malloc(3*768*sizeof(Uint32));
1018 r_2_pix_alloc = &swdata->rgb_2_pix[0*768];
1019 g_2_pix_alloc = &swdata->rgb_2_pix[1*768];
1020 b_2_pix_alloc = &swdata->rgb_2_pix[2*768];
1021 if ( ! swdata->pixels || ! swdata->colortab || ! swdata->rgb_2_pix ) {
1022 SDL_OutOfMemory();
1023 SDL_FreeYUVOverlay(overlay);
1024 return(NULL);
1025 }
1026
1027 /* Generate the tables for the display surface */
1028 for (i=0; i<256; i++) {
1029 /* Gamma correction (luminescence table) and chroma correction
1030 would be done here. See the Berkeley mpeg_play sources.
1031 */
1032 CB = CR = (i-128);
1033 Cr_r_tab[i] = (int) ( (0.419/0.299) * CR);
1034 Cr_g_tab[i] = (int) (-(0.299/0.419) * CR);
1035 Cb_g_tab[i] = (int) (-(0.114/0.331) * CB);
1036 Cb_b_tab[i] = (int) ( (0.587/0.331) * CB);
1037 }
1038
1039 /*
1040 * Set up entries 0-255 in rgb-to-pixel value tables.
1041 */
1042 Rmask = display->format->Rmask;
1043 Gmask = display->format->Gmask;
1044 Bmask = display->format->Bmask;
1045 for ( i=0; i<256; ++i ) {
1046 r_2_pix_alloc[i+256] = i >> (8 - number_of_bits_set(Rmask));
1047 r_2_pix_alloc[i+256] <<= free_bits_at_bottom(Rmask);
1048 g_2_pix_alloc[i+256] = i >> (8 - number_of_bits_set(Gmask));
1049 g_2_pix_alloc[i+256] <<= free_bits_at_bottom(Gmask);
1050 b_2_pix_alloc[i+256] = i >> (8 - number_of_bits_set(Bmask));
1051 b_2_pix_alloc[i+256] <<= free_bits_at_bottom(Bmask);
1052 }
1053
1054 /*
1055 * If we have 16-bit output depth, then we double the value
1056 * in the top word. This means that we can write out both
1057 * pixels in the pixel doubling mode with one op. It is
1058 * harmless in the normal case as storing a 32-bit value
1059 * through a short pointer will lose the top bits anyway.
1060 */
1061 if( display->format->BytesPerPixel == 2 ) {
1062 for ( i=0; i<256; ++i ) {
1063 r_2_pix_alloc[i+256] |= (r_2_pix_alloc[i+256]) << 16;
1064 g_2_pix_alloc[i+256] |= (g_2_pix_alloc[i+256]) << 16;
1065 b_2_pix_alloc[i+256] |= (b_2_pix_alloc[i+256]) << 16;
1066 }
1067 }
1068
1069 /*
1070 * Spread out the values we have to the rest of the array so that
1071 * we do not need to check for overflow.
1072 */
1073 for ( i=0; i<256; ++i ) {
1074 r_2_pix_alloc[i] = r_2_pix_alloc[256];
1075 r_2_pix_alloc[i+512] = r_2_pix_alloc[511];
1076 g_2_pix_alloc[i] = g_2_pix_alloc[256];
1077 g_2_pix_alloc[i+512] = g_2_pix_alloc[511];
1078 b_2_pix_alloc[i] = b_2_pix_alloc[256];
1079 b_2_pix_alloc[i+512] = b_2_pix_alloc[511];
1080 }
1081
1082 /* You have chosen wisely... */
1083 switch (format) {
1084 case SDL_YV12_OVERLAY:
1085 case SDL_IYUV_OVERLAY:
1086 cpu_mmx = CPU_Flags() & MMX_CPU;
1087 if ( display->format->BytesPerPixel == 2 ) {
1088 #if defined(i386) && defined(__GNUC__) && defined(USE_ASMBLIT)
1089 /* inline assembly functions */
1090 if ( cpu_mmx && (Rmask == 0xF800) &&
1091 (Gmask == 0x07E0) &&
1092 (Bmask == 0x001F) &&
1093 (width & 15) == 0) {
1094 /*printf("Using MMX 16-bit 565 dither\n");*/
1095 swdata->Display1X = Color565DitherYV12MMX1X;
1096 } else {
1097 /*printf("Using C 16-bit dither\n");*/
1098 swdata->Display1X = Color16DitherYV12Mod1X;
1099 }
1100 #else
1101 swdata->Display1X = Color16DitherYV12Mod1X;
1102 #endif
1103 swdata->Display2X = Color16DitherYV12Mod2X;
1104 }
1105 if ( display->format->BytesPerPixel == 3 ) {
1106 swdata->Display1X = Color24DitherYV12Mod1X;
1107 swdata->Display2X = Color24DitherYV12Mod2X;
1108 }
1109 if ( display->format->BytesPerPixel == 4 ) {
1110 #if defined(i386) && defined(__GNUC__) && defined(USE_ASMBLIT)
1111 /* inline assembly functions */
1112 if ( cpu_mmx && (Rmask == 0x00FF0000) &&
1113 (Gmask == 0x0000FF00) &&
1114 (Bmask == 0x000000FF) &&
1115 (width & 15) == 0) {
1116 /*printf("Using MMX 32-bit dither\n");*/
1117 swdata->Display1X = ColorRGBDitherYV12MMX1X;
1118 } else {
1119 /*printf("Using C 32-bit dither\n");*/
1120 swdata->Display1X = Color32DitherYV12Mod1X;
1121 }
1122 #else
1123 swdata->Display1X = Color32DitherYV12Mod1X;
1124 #endif
1125 swdata->Display2X = Color32DitherYV12Mod2X;
1126 }
1127 break;
1128 case SDL_YUY2_OVERLAY:
1129 case SDL_UYVY_OVERLAY:
1130 case SDL_YVYU_OVERLAY:
1131 if ( display->format->BytesPerPixel == 2 ) {
1132 swdata->Display1X = Color16DitherYUY2Mod1X;
1133 swdata->Display2X = Color16DitherYUY2Mod2X;
1134 }
1135 if ( display->format->BytesPerPixel == 3 ) {
1136 swdata->Display1X = Color24DitherYUY2Mod1X;
1137 swdata->Display2X = Color24DitherYUY2Mod2X;
1138 }
1139 if ( display->format->BytesPerPixel == 4 ) {
1140 swdata->Display1X = Color32DitherYUY2Mod1X;
1141 swdata->Display2X = Color32DitherYUY2Mod2X;
1142 }
1143 break;
1144 default:
1145 /* We should never get here (caught above) */
1146 break;
1147 }
1148
1149 /* Find the pitch and offset values for the overlay */
1150 overlay->pitches = swdata->pitches;
1151 overlay->pixels = swdata->planes;
1152 switch (format) {
1153 case SDL_YV12_OVERLAY:
1154 case SDL_IYUV_OVERLAY:
1155 overlay->pitches[0] = overlay->w;
1156 overlay->pitches[1] = overlay->pitches[0] / 2;
1157 overlay->pitches[2] = overlay->pitches[0] / 2;
1158 overlay->pixels[0] = swdata->pixels;
1159 overlay->pixels[1] = overlay->pixels[0] +
1160 overlay->pitches[0] * overlay->h;
1161 overlay->pixels[2] = overlay->pixels[1] +
1162 overlay->pitches[1] * overlay->h / 2;
1163 overlay->planes = 3;
1164 break;
1165 case SDL_YUY2_OVERLAY:
1166 case SDL_UYVY_OVERLAY:
1167 case SDL_YVYU_OVERLAY:
1168 overlay->pitches[0] = overlay->w*2;
1169 overlay->pixels[0] = swdata->pixels;
1170 overlay->planes = 1;
1171 break;
1172 default:
1173 /* We should never get here (caught above) */
1174 break;
1175 }
1176
1177 /* We're all done.. */
1178 return(overlay);
1179 }
1180
1181 int SDL_LockYUV_SW(_THIS, SDL_Overlay *overlay)
/* [<][>][^][v][top][bottom][index][help] */
1182 {
1183 return(0);
1184 }
1185
1186 void SDL_UnlockYUV_SW(_THIS, SDL_Overlay *overlay)
/* [<][>][^][v][top][bottom][index][help] */
1187 {
1188 return;
1189 }
1190
1191 int SDL_DisplayYUV_SW(_THIS, SDL_Overlay *overlay, SDL_Rect *dstrect)
/* [<][>][^][v][top][bottom][index][help] */
1192 {
1193 struct private_yuvhwdata *swdata;
1194 SDL_Surface *stretch;
1195 SDL_Surface *display;
1196 int scale_2x;
1197 Uint8 *lum, *Cr, *Cb;
1198 Uint8 *dst;
1199 int mod;
1200
1201 swdata = overlay->hwdata;
1202 scale_2x = 0;
1203 stretch = 0;
1204 if ( (overlay->w != dstrect->w) || (overlay->h != dstrect->h) ) {
1205 if ( (dstrect->w == 2*overlay->w) &&
1206 (dstrect->h == 2*overlay->h) ) {
1207 scale_2x = 1;
1208 } else {
1209 if ( ! swdata->stretch ) {
1210 display = swdata->display;
1211 swdata->stretch = SDL_CreateRGBSurface(
1212 SDL_SWSURFACE,
1213 overlay->w, overlay->h,
1214 display->format->BitsPerPixel,
1215 display->format->Rmask,
1216 display->format->Gmask,
1217 display->format->Bmask, 0);
1218 if ( ! swdata->stretch ) {
1219 return(-1);
1220 }
1221 }
1222 stretch = swdata->stretch;
1223 }
1224 }
1225
1226 if ( stretch ) {
1227 display = stretch;
1228 } else {
1229 display = swdata->display;
1230 }
1231 switch (overlay->format) {
1232 case SDL_YV12_OVERLAY:
1233 lum = overlay->pixels[0];
1234 Cr = overlay->pixels[1];
1235 Cb = overlay->pixels[2];
1236 break;
1237 case SDL_IYUV_OVERLAY:
1238 lum = overlay->pixels[0];
1239 Cr = overlay->pixels[2];
1240 Cb = overlay->pixels[1];
1241 break;
1242 case SDL_YUY2_OVERLAY:
1243 lum = overlay->pixels[0];
1244 Cr = lum + 3;
1245 Cb = lum + 1;
1246 break;
1247 case SDL_UYVY_OVERLAY:
1248 lum = overlay->pixels[0]+1;
1249 Cr = lum + 1;
1250 Cb = lum - 1;
1251 break;
1252 case SDL_YVYU_OVERLAY:
1253 lum = overlay->pixels[0];
1254 Cr = lum + 1;
1255 Cb = lum + 3;
1256 break;
1257 default:
1258 SDL_SetError("Unsupported YUV format in blit (??)");
1259 return(-1);
1260 }
1261 if ( SDL_MUSTLOCK(display) ) {
1262 if ( SDL_LockSurface(display) < 0 ) {
1263 return(-1);
1264 }
1265 }
1266 if ( stretch ) {
1267 dst = (Uint8 *)stretch->pixels;
1268 } else {
1269 dst = (Uint8 *)display->pixels
1270 + dstrect->x * display->format->BytesPerPixel
1271 + dstrect->y * display->pitch;
1272 }
1273 mod = (display->pitch / display->format->BytesPerPixel);
1274
1275 if ( scale_2x ) {
1276 mod -= (overlay->w * 2);
1277 swdata->Display2X(swdata->colortab, swdata->rgb_2_pix,
1278 lum, Cr, Cb, dst, overlay->h, overlay->w,mod);
1279 } else {
1280 mod -= overlay->w;
1281 swdata->Display1X(swdata->colortab, swdata->rgb_2_pix,
1282 lum, Cr, Cb, dst, overlay->h, overlay->w,mod);
1283 }
1284 if ( SDL_MUSTLOCK(display) ) {
1285 SDL_UnlockSurface(display);
1286 }
1287 if ( stretch ) {
1288 display = swdata->display;
1289 SDL_SoftStretch(stretch, NULL, display, dstrect);
1290 }
1291 SDL_UpdateRects(display, 1, dstrect);
1292
1293 return(0);
1294 }
1295
1296 void SDL_FreeYUV_SW(_THIS, SDL_Overlay *overlay)
/* [<][>][^][v][top][bottom][index][help] */
1297 {
1298 struct private_yuvhwdata *swdata;
1299
1300 swdata = overlay->hwdata;
1301 if ( swdata ) {
1302 if ( swdata->pixels ) {
1303 free(swdata->pixels);
1304 }
1305 if ( swdata->colortab ) {
1306 free(swdata->colortab);
1307 }
1308 if ( swdata->rgb_2_pix ) {
1309 free(swdata->rgb_2_pix);
1310 }
1311 free(swdata);
1312 }
1313 }