author | kergoth <kergoth> | 2002-01-25 22:14:26 (UTC) |
---|---|---|
committer | kergoth <kergoth> | 2002-01-25 22:14:26 (UTC) |
commit | 15318cad33835e4e2dc620d033e43cd930676cdd (patch) (unidiff) | |
tree | c2fa0399a2c47fda8e2cd0092c73a809d17f68eb /core/multimedia/opieplayer/libflash/graphic32.cc | |
download | opie-15318cad33835e4e2dc620d033e43cd930676cdd.zip opie-15318cad33835e4e2dc620d033e43cd930676cdd.tar.gz opie-15318cad33835e4e2dc620d033e43cd930676cdd.tar.bz2 |
Initial revision
Diffstat (limited to 'core/multimedia/opieplayer/libflash/graphic32.cc') (more/less context) (ignore whitespace changes)
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diff --git a/core/multimedia/opieplayer/libflash/graphic32.cc b/core/multimedia/opieplayer/libflash/graphic32.cc new file mode 100644 index 0000000..b9c2008 --- a/dev/null +++ b/core/multimedia/opieplayer/libflash/graphic32.cc | |||
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1 | //////////////////////////////////////////////////////////// | ||
2 | // Flash Plugin and Player | ||
3 | // Copyright (C) 1998 Olivier Debon | ||
4 | // | ||
5 | // This program is free software; you can redistribute it and/or | ||
6 | // modify it under the terms of the GNU General Public License | ||
7 | // as published by the Free Software Foundation; either version 2 | ||
8 | // of the License, or (at your option) any later version. | ||
9 | // | ||
10 | // This program 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 | ||
13 | // GNU General Public License for more details. | ||
14 | // | ||
15 | // You should have received a copy of the GNU General Public License | ||
16 | // along with this program; if not, write to the Free Software | ||
17 | // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | ||
18 | // | ||
19 | /////////////////////////////////////////////////////////////// | ||
20 | // Author : Olivier Debon <odebon@club-internet.fr> | ||
21 | // | ||
22 | |||
23 | #include "swf.h" | ||
24 | |||
25 | #include "graphic32.h" | ||
26 | |||
27 | extern unsigned char SQRT[]; | ||
28 | |||
29 | #define FULL_AA | ||
30 | |||
31 | #define PRINT 0 | ||
32 | |||
33 | typedef unsigned long TYPE; | ||
34 | |||
35 | GraphicDevice32::GraphicDevice32(FlashDisplay *fd) : GraphicDevice(fd) | ||
36 | { | ||
37 | } | ||
38 | |||
39 | long | ||
40 | GraphicDevice32::allocColor(Color color) | ||
41 | { | ||
42 | return (color.red)<<16 | (color.green)<<8 | (color.blue); | ||
43 | } | ||
44 | |||
45 | void | ||
46 | GraphicDevice32::clearCanvas() | ||
47 | { | ||
48 | TYPE pixel; | ||
49 | TYPE *point,*p; | ||
50 | long h, w,n; | ||
51 | |||
52 | if (!bgInitialized) return; | ||
53 | |||
54 | pixel = allocColor(backgroundColor); | ||
55 | |||
56 | point = (TYPE *)(canvasBuffer + clip_rect.ymin * bpl) + clip_rect.xmin; | ||
57 | w = clip_rect.xmax - clip_rect.xmin; | ||
58 | h = clip_rect.ymax - clip_rect.ymin; | ||
59 | |||
60 | while (h--) { | ||
61 | p = point; | ||
62 | n = w; | ||
63 | while (n--) { | ||
64 | *p++ = pixel; | ||
65 | } | ||
66 | |||
67 | point = (TYPE *)((char *)point + bpl); | ||
68 | } | ||
69 | |||
70 | flashDisplay->flash_refresh = 1; | ||
71 | flashDisplay->clip_x = clip_rect.xmin; | ||
72 | flashDisplay->clip_y = clip_rect.ymin; | ||
73 | flashDisplay->clip_width = clip_rect.xmax-clip_rect.xmin; | ||
74 | flashDisplay->clip_height = clip_rect.ymax-clip_rect.ymin; | ||
75 | } | ||
76 | |||
77 | #define RED_MASK 0xFF0000 | ||
78 | #define GREEN_MASK 0x00FF00 | ||
79 | #define BLUE_MASK 0x0000FF | ||
80 | |||
81 | /* alpha = 0 : select c1, alpha = 255 select c2 */ | ||
82 | static inline unsigned long | ||
83 | mix_alpha(unsigned long c1, unsigned long c2, int alpha) | ||
84 | { | ||
85 | long r1,r2,r; | ||
86 | long g1,g2,g; | ||
87 | long b1,b2,b; | ||
88 | |||
89 | r1 = c1 & RED_MASK; | ||
90 | r2 = c2 & RED_MASK; | ||
91 | r = (((r2-r1)*alpha + r1 * 256) >> 8) & RED_MASK; | ||
92 | |||
93 | g1 = c1 & GREEN_MASK; | ||
94 | g2 = c2 & GREEN_MASK; | ||
95 | g = (((g2-g1)*alpha + g1 * 256) >> 8) & GREEN_MASK; | ||
96 | |||
97 | b1 = c1 & BLUE_MASK; | ||
98 | b2 = c2 & BLUE_MASK; | ||
99 | b = (((b2-b1)*alpha + b1 * 256) >> 8) & BLUE_MASK; | ||
100 | |||
101 | return (r|g|b); | ||
102 | } | ||
103 | |||
104 | void | ||
105 | GraphicDevice32::fillLineAA(FillStyleDef *f, long y, long start, long end) | ||
106 | { | ||
107 | register long n; | ||
108 | TYPE *line; | ||
109 | TYPE *point,pixel; | ||
110 | unsigned int alpha, start_alpha,end_alpha; | ||
111 | |||
112 | if (clip(y,start,end)) return; | ||
113 | |||
114 | line = (TYPE *)(canvasBuffer + bpl*y); | ||
115 | |||
116 | alpha = f->color.alpha; | ||
117 | pixel = f->color.pixel; | ||
118 | |||
119 | if (alpha == ALPHA_OPAQUE) { | ||
120 | |||
121 | start_alpha = 255 - ((start & (FRAC-1)) << (8-FRAC_BITS)); | ||
122 | end_alpha = (end & (FRAC-1)) << (8-FRAC_BITS); | ||
123 | |||
124 | start >>= FRAC_BITS; | ||
125 | end >>= FRAC_BITS; | ||
126 | |||
127 | point = &line[start]; | ||
128 | |||
129 | if (start == end) { | ||
130 | *point = mix_alpha(*point, pixel, start_alpha + end_alpha - 255); | ||
131 | } else { | ||
132 | n = end-start; | ||
133 | if (start_alpha < 255) { | ||
134 | *point = mix_alpha(*point, pixel, start_alpha); | ||
135 | point++; | ||
136 | n--; | ||
137 | } | ||
138 | while (n > 0) { | ||
139 | *point = pixel; | ||
140 | point++; | ||
141 | n--; | ||
142 | } | ||
143 | if (end_alpha > 0) { | ||
144 | *point = mix_alpha(*point, pixel, end_alpha); | ||
145 | } | ||
146 | } | ||
147 | } else { | ||
148 | |||
149 | start_alpha = 255 - ((start & (FRAC-1)) << (8-FRAC_BITS)); | ||
150 | end_alpha = (end & (FRAC-1)) << (8-FRAC_BITS); | ||
151 | |||
152 | start >>= FRAC_BITS; | ||
153 | end >>= FRAC_BITS; | ||
154 | |||
155 | point = &line[start]; | ||
156 | |||
157 | if (start == end) { | ||
158 | *point = mix_alpha(*point, pixel, | ||
159 | ((start_alpha + end_alpha - 255) * alpha) >> 8); | ||
160 | } else { | ||
161 | n = end-start; | ||
162 | if (start_alpha < 255) { | ||
163 | *point = mix_alpha(*point, pixel, (start_alpha * alpha) >> 8); | ||
164 | point++; | ||
165 | n--; | ||
166 | } | ||
167 | while (n > 0) { | ||
168 | *point = mix_alpha(*point, pixel, alpha); | ||
169 | point++; | ||
170 | n--; | ||
171 | } | ||
172 | if (end_alpha > 0) { | ||
173 | *point = mix_alpha(*point, pixel, (end_alpha * alpha) >> 8); | ||
174 | } | ||
175 | } | ||
176 | } | ||
177 | } | ||
178 | |||
179 | void | ||
180 | GraphicDevice32::fillLine(FillStyleDef *f, long y, long start, long end) | ||
181 | { | ||
182 | register long n; | ||
183 | TYPE *line,*point; | ||
184 | TYPE pixel; | ||
185 | unsigned int alpha; | ||
186 | |||
187 | if (clip(y,start,end)) return; | ||
188 | |||
189 | start >>= FRAC_BITS; | ||
190 | end >>= FRAC_BITS; | ||
191 | |||
192 | line = (TYPE *)(canvasBuffer + bpl*y); | ||
193 | point = &line[start]; | ||
194 | n = end-start; | ||
195 | pixel = f->color.pixel; | ||
196 | alpha = f->color.alpha; | ||
197 | if (alpha == ALPHA_OPAQUE) { | ||
198 | while (n--) { | ||
199 | *point = pixel; | ||
200 | point++; | ||
201 | } | ||
202 | } else { | ||
203 | while (n--) { | ||
204 | *point = mix_alpha(*point, pixel, alpha); | ||
205 | point++; | ||
206 | } | ||
207 | } | ||
208 | } | ||
209 | |||
210 | void | ||
211 | GraphicDevice32::fillLineBitmap(FillStyleDef *f, long y, long start, long end) | ||
212 | { | ||
213 | int n; | ||
214 | long x1,y1,dx,dy; | ||
215 | Matrix *m = &f->bitmap_matrix; | ||
216 | Bitmap *b = f->bitmap; | ||
217 | unsigned char *pixels; | ||
218 | TYPE *p; | ||
219 | Color *cmap; | ||
220 | long pixbpl; | ||
221 | TYPE pixel; | ||
222 | int offset; | ||
223 | unsigned char *alpha_table; | ||
224 | |||
225 | /* safety test) */ | ||
226 | if (!b) return; | ||
227 | |||
228 | if (clip(y,start,end)) return; | ||
229 | |||
230 | start /= FRAC; | ||
231 | end /= FRAC; | ||
232 | n = end - start; | ||
233 | p = (TYPE *) (this->canvasBuffer + this->bpl*y + start * sizeof(TYPE)); | ||
234 | |||
235 | /* the coordinates in the image are normalized to 16 bits */ | ||
236 | x1 = (long) (m->a * start + m->b * y + m->tx); | ||
237 | y1 = (long) (m->c * start + m->d * y + m->ty); | ||
238 | dx = (long) (m->a); | ||
239 | dy = (long) (m->c); | ||
240 | |||
241 | pixels = b->pixels; | ||
242 | pixbpl = b->bpl; | ||
243 | cmap = f->cmap; | ||
244 | |||
245 | if (b->alpha_buf == NULL) { | ||
246 | while (n) { | ||
247 | if (x1 >= 0 && y1 >= 0 && | ||
248 | (x1 >> 16) < b->width && (y1 >> 16) < b->height) { | ||
249 | |||
250 | pixel = cmap[pixels[(y1 >> 16) * pixbpl + (x1 >> 16)]].pixel; | ||
251 | *p = pixel; | ||
252 | } | ||
253 | x1 += dx; | ||
254 | y1 += dy; | ||
255 | p++; | ||
256 | n--; | ||
257 | } | ||
258 | } else if (f->alpha_table) { | ||
259 | alpha_table = f->alpha_table; | ||
260 | while (n) { | ||
261 | if (x1 >= 0 && y1 >= 0 && | ||
262 | (x1 >> 16) < b->width && (y1 >> 16) < b->height) { | ||
263 | |||
264 | offset = (y1 >> 16) * pixbpl + (x1 >> 16); | ||
265 | pixel = cmap[pixels[offset]].pixel; | ||
266 | *p = mix_alpha(*p, pixel, alpha_table[b->alpha_buf[offset]]); | ||
267 | } | ||
268 | x1 += dx; | ||
269 | y1 += dy; | ||
270 | p++; | ||
271 | n--; | ||
272 | } | ||
273 | } else { | ||
274 | while (n) { | ||
275 | if (x1 >= 0 && y1 >= 0 && | ||
276 | (x1 >> 16) < b->width && (y1 >> 16) < b->height) { | ||
277 | |||
278 | offset = (y1 >> 16) * pixbpl + (x1 >> 16); | ||
279 | pixel = cmap[pixels[offset]].pixel; | ||
280 | *p = mix_alpha(*p, pixel, b->alpha_buf[offset]); | ||
281 | } | ||
282 | x1 += dx; | ||
283 | y1 += dy; | ||
284 | p++; | ||
285 | n--; | ||
286 | } | ||
287 | } | ||
288 | } | ||
289 | |||
290 | void | ||
291 | GraphicDevice32::fillLineLG(Gradient *grad, long y, long start, long end) | ||
292 | { | ||
293 | long dr,r,v,r2; | ||
294 | register long n; | ||
295 | TYPE *line; | ||
296 | TYPE *point; | ||
297 | Color *cp,*ramp; | ||
298 | Matrix *m = &grad->imat; | ||
299 | unsigned int start_alpha,end_alpha; | ||
300 | |||
301 | if (clip(y,start,end)) return; | ||
302 | |||
303 | start_alpha = 255 - ((start & (FRAC-1)) << (8-FRAC_BITS)); | ||
304 | end_alpha = (end & (FRAC-1)) << (8-FRAC_BITS); | ||
305 | |||
306 | start /= FRAC; | ||
307 | end /= FRAC; | ||
308 | |||
309 | n = end-start; | ||
310 | |||
311 | r = (long) (m->a * start + m->b * y + m->tx); | ||
312 | dr = (long) (m->a); | ||
313 | |||
314 | ramp = grad->ramp; | ||
315 | |||
316 | line = (TYPE *)(canvasBuffer + bpl*y); | ||
317 | point = &line[start]; | ||
318 | |||
319 | r2 = r + n * dr; | ||
320 | if ( ((r | r2) & ~255) == 0 ) { | ||
321 | if (!grad->has_alpha) { | ||
322 | #ifdef FULL_AA | ||
323 | if (start_alpha < 255) { | ||
324 | v = r>>16; | ||
325 | *point = mix_alpha(*point, (TYPE)ramp[v].pixel, start_alpha); | ||
326 | point++; | ||
327 | r += dr; | ||
328 | n--; | ||
329 | } | ||
330 | #endif /* FULL_AA */ | ||
331 | while (n>0) { | ||
332 | v = r>>16; | ||
333 | *point = (TYPE)ramp[v].pixel; | ||
334 | point++; | ||
335 | r += dr; | ||
336 | n--; | ||
337 | } | ||
338 | #ifdef FULL_AA | ||
339 | if (end_alpha > 0) { | ||
340 | v = r>>16; | ||
341 | *point = mix_alpha(*point, (TYPE)ramp[v].pixel, end_alpha); | ||
342 | } | ||
343 | #endif /* FULL_AA */ | ||
344 | } else { | ||
345 | while (n--) { | ||
346 | v = r>>16; | ||
347 | cp = &ramp[v]; | ||
348 | *point = mix_alpha(*point, cp->pixel, cp->alpha); | ||
349 | point++; | ||
350 | r += dr; | ||
351 | } | ||
352 | } | ||
353 | } else { | ||
354 | if (!grad->has_alpha) { | ||
355 | #ifdef FULL_AA | ||
356 | if (start_alpha < 255) { | ||
357 | v = r>>16; | ||
358 | if (v < 0) v = 0; | ||
359 | else if (v > 255) v = 255; | ||
360 | *point = mix_alpha(*point, (TYPE)ramp[v].pixel, start_alpha); | ||
361 | point++; | ||
362 | r += dr; | ||
363 | n--; | ||
364 | } | ||
365 | #endif /* FULL_AA */ | ||
366 | while (n>0) { | ||
367 | v = r>>16; | ||
368 | if (v < 0) v = 0; | ||
369 | else if (v > 255) v = 255; | ||
370 | *point = (TYPE)ramp[v].pixel; | ||
371 | point++; | ||
372 | r += dr; | ||
373 | n--; | ||
374 | } | ||
375 | #ifdef FULL_AA | ||
376 | if (end_alpha > 0) { | ||
377 | v = r>>16; | ||
378 | if (v < 0) v = 0; | ||
379 | else if (v > 255) v = 255; | ||
380 | *point = mix_alpha(*point, (TYPE)ramp[v].pixel, end_alpha); | ||
381 | } | ||
382 | #endif /* FULL_AA */ | ||
383 | } else { | ||
384 | while (n--) { | ||
385 | v = r>>16; | ||
386 | if (v < 0) v = 0; | ||
387 | else if (v > 255) v = 255; | ||
388 | cp = &ramp[v]; | ||
389 | *point = mix_alpha(*point, cp->pixel, cp->alpha); | ||
390 | point++; | ||
391 | r += dr; | ||
392 | } | ||
393 | } | ||
394 | } | ||
395 | } | ||
396 | |||
397 | void | ||
398 | GraphicDevice32::fillLineRG(Gradient *grad, long y, long start, long end) | ||
399 | { | ||
400 | long X,dx,r,Y,dy; | ||
401 | long dist2; | ||
402 | register long n; | ||
403 | Color *cp,*ramp; | ||
404 | TYPE *line; | ||
405 | TYPE *point; | ||
406 | Matrix *m = &grad->imat; | ||
407 | unsigned int start_alpha,end_alpha; | ||
408 | |||
409 | if (clip(y,start,end)) return; | ||
410 | |||
411 | start_alpha = 255 - ((start & (FRAC-1)) << (8-FRAC_BITS)); | ||
412 | end_alpha = (end & (FRAC-1)) << (8-FRAC_BITS); | ||
413 | |||
414 | start /= FRAC; | ||
415 | end /= FRAC; | ||
416 | |||
417 | n = end-start; | ||
418 | |||
419 | X = (long) (m->a * start + m->b * y + m->tx); | ||
420 | Y = (long) (m->c * start + m->d * y + m->ty); | ||
421 | dx = (long) (m->a); | ||
422 | dy = (long) (m->c); | ||
423 | |||
424 | ramp = grad->ramp; | ||
425 | |||
426 | line = (TYPE *)(canvasBuffer + bpl*y); | ||
427 | point = &line[start]; | ||
428 | |||
429 | if (!grad->has_alpha) { | ||
430 | #ifdef FULL_AA | ||
431 | if (start == end) { | ||
432 | dist2 = ((X>>16)*(X>>16))+((Y>>16)*(Y>>16)); | ||
433 | if ((unsigned long)dist2 >= 65536) { | ||
434 | r = 255; | ||
435 | } else { | ||
436 | r = SQRT[dist2]; | ||
437 | } | ||
438 | *point = mix_alpha(*point, (TYPE)ramp[r].pixel, start_alpha + end_alpha - 255); | ||
439 | } else { | ||
440 | if (start_alpha < 255) { | ||
441 | dist2 = ((X>>16)*(X>>16))+((Y>>16)*(Y>>16)); | ||
442 | if ((unsigned long)dist2 >= 65536) { | ||
443 | r = 255; | ||
444 | } else { | ||
445 | r = SQRT[dist2]; | ||
446 | } | ||
447 | *point = mix_alpha(*point, (TYPE)ramp[r].pixel, start_alpha); | ||
448 | point++; | ||
449 | X += dx; | ||
450 | Y += dy; | ||
451 | n--; | ||
452 | } | ||
453 | #endif /* FULL_AA */ | ||
454 | while (n>0) { | ||
455 | dist2 = ((X>>16)*(X>>16))+((Y>>16)*(Y>>16)); | ||
456 | if ((unsigned long)dist2 >= 65536) { | ||
457 | r = 255; | ||
458 | } else { | ||
459 | r= SQRT[dist2]; | ||
460 | } | ||
461 | *point = (TYPE)ramp[r].pixel; | ||
462 | point++; | ||
463 | X += dx; | ||
464 | Y += dy; | ||
465 | n--; | ||
466 | } | ||
467 | #ifdef FULL_AA | ||
468 | if (end_alpha > 0) { | ||
469 | dist2 = ((X>>16)*(X>>16))+((Y>>16)*(Y>>16)); | ||
470 | if ((unsigned long)dist2 >= 65536) { | ||
471 | r = 255; | ||
472 | } else { | ||
473 | r= SQRT[dist2]; | ||
474 | } | ||
475 | *point = mix_alpha(*point, (TYPE)ramp[r].pixel, end_alpha); | ||
476 | } | ||
477 | } | ||
478 | #endif /* FULL_AA */ | ||
479 | |||
480 | } else { | ||
481 | while (n--) { | ||
482 | dist2 = ((X>>16)*(X>>16))+((Y>>16)*(Y>>16)); | ||
483 | if ((unsigned long)dist2 >= 65536) { | ||
484 | r = 255; | ||
485 | } else { | ||
486 | r= SQRT[dist2]; | ||
487 | } | ||
488 | cp = &ramp[r]; | ||
489 | *point = mix_alpha(*point, cp->pixel, cp->alpha); | ||
490 | point++; | ||
491 | X += dx; | ||
492 | Y += dy; | ||
493 | } | ||
494 | } | ||
495 | } | ||
496 | |||
497 | void | ||
498 | GraphicDevice32::drawLine(long x1, long y1, long x2, long y2, long width) | ||
499 | { | ||
500 | int n,adr,dx,dy,sx,color; | ||
501 | register int a; | ||
502 | register TYPE *pp; | ||
503 | int alpha; | ||
504 | |||
505 | x1 = (x1) >> FRAC_BITS; | ||
506 | y1 = (y1) >> FRAC_BITS; | ||
507 | x2 = (x2) >> FRAC_BITS; | ||
508 | y2 = (y2) >> FRAC_BITS; | ||
509 | |||
510 | if (y1 > y2 || (y1 == y2 && x1 > x2)) { | ||
511 | long tmp; | ||
512 | |||
513 | tmp=x1; | ||
514 | x1=x2; | ||
515 | x2=tmp; | ||
516 | |||
517 | tmp=y1; | ||
518 | y1=y2; | ||
519 | y2=tmp; | ||
520 | } | ||
521 | |||
522 | if (y1 == y2 && (y1 < clip_rect.ymin || y1 > clip_rect.ymax)) return; | ||
523 | if (x1 == x2 && (x1 < clip_rect.xmin || x1 > clip_rect.xmax)) return; | ||
524 | if (x1 == x2 && y1 == y2) return;// Bad !!! | ||
525 | |||
526 | if (y1 < clip_rect.ymin && y1 != y2) { | ||
527 | x1 += (x2-x1)*(clip_rect.ymin-y1)/(y2-y1); | ||
528 | y1 = clip_rect.ymin; | ||
529 | } | ||
530 | |||
531 | if (y2 > clip_rect.ymax && y1 != y2) { | ||
532 | x2 -= (x2-x1)*(y2-clip_rect.ymax)/(y2-y1); | ||
533 | y2 = clip_rect.ymax; | ||
534 | } | ||
535 | |||
536 | if (x1 < x2) { | ||
537 | if (x1 < clip_rect.xmin && x1 != x2) { | ||
538 | y1 += (y2-y1)*(clip_rect.xmin-x1)/(x2-x1); | ||
539 | x1 = clip_rect.xmin; | ||
540 | } | ||
541 | |||
542 | if (x2 > clip_rect.xmax && x1 != x2) { | ||
543 | y2 -= (y2-y1)*(x2-clip_rect.xmax)/(x2-x1); | ||
544 | x2 = clip_rect.xmax; | ||
545 | } | ||
546 | } | ||
547 | |||
548 | if (x1 > x2) { | ||
549 | if (x2 < clip_rect.xmin && x2 != x1) { | ||
550 | y2 -= (y2-y1)*(clip_rect.xmin-x2)/(x1-x2); | ||
551 | x2 = clip_rect.xmin; | ||
552 | } | ||
553 | |||
554 | if (x1 > clip_rect.xmax && x2 != x1) { | ||
555 | y1 += (y2-y1)*(x1-clip_rect.xmax)/(x1-x2); | ||
556 | x1 = clip_rect.xmax; | ||
557 | } | ||
558 | } | ||
559 | |||
560 | // Check again | ||
561 | if (x1 == x2 && y1 == y2) return; | ||
562 | if (x1 < clip_rect.xmin || x2 < clip_rect.xmin) return; | ||
563 | if (y1 < clip_rect.ymin || y2 < clip_rect.ymin) return; | ||
564 | if (x1 > clip_rect.xmax || x2 > clip_rect.xmax) return; | ||
565 | if (y1 > clip_rect.ymax || y2 > clip_rect.ymax) return; | ||
566 | |||
567 | sx=bpl >> 1; | ||
568 | adr=(y1 * sx + x1); | ||
569 | pp = (TYPE *)canvasBuffer + adr; | ||
570 | |||
571 | dx = x2 - x1; | ||
572 | dy = y2 - y1; | ||
573 | |||
574 | color = allocColor(foregroundColor); | ||
575 | alpha = foregroundColor.alpha; | ||
576 | |||
577 | if (alpha == ALPHA_OPAQUE) { | ||
578 | |||
579 | #define PUTPIXEL() \ | ||
580 | { \ | ||
581 | *pp=color; \ | ||
582 | } | ||
583 | |||
584 | #define DRAWLINE(dx,dy,inc_1,inc_2) \ | ||
585 | n=dx;\ | ||
586 | a=2*dy-dx;\ | ||
587 | dy=2*dy;\ | ||
588 | dx=2*dx-dy;\ | ||
589 | do {\ | ||
590 | PUTPIXEL();\ | ||
591 | if (a>0) { pp+=(inc_1); a-=dx; }\ | ||
592 | else { pp+=(inc_2); a+=dy; }\ | ||
593 | } while (--n >= 0); | ||
594 | |||
595 | /* fin macro */ | ||
596 | |||
597 | if (dx == 0 && dy == 0) { | ||
598 | PUTPIXEL(); | ||
599 | } else if (dx > 0) { | ||
600 | if (dx >= dy) { | ||
601 | DRAWLINE(dx, dy, sx + 1, 1); | ||
602 | } else { | ||
603 | DRAWLINE(dy, dx, sx + 1, sx); | ||
604 | } | ||
605 | } else { | ||
606 | dx = -dx; | ||
607 | if (dx >= dy) { | ||
608 | DRAWLINE(dx, dy, sx - 1, -1); | ||
609 | } else { | ||
610 | DRAWLINE(dy, dx, sx - 1, sx); | ||
611 | } | ||
612 | } | ||
613 | |||
614 | |||
615 | #undef DRAWLINE | ||
616 | #undef PUTPIXEL | ||
617 | } else { | ||
618 | #define PUTPIXEL() \ | ||
619 | { \ | ||
620 | *pp=mix_alpha(*pp,color,alpha); \ | ||
621 | } | ||
622 | |||
623 | #define DRAWLINE(dx,dy,inc_1,inc_2) \ | ||
624 | n=dx;\ | ||
625 | a=2*dy-dx;\ | ||
626 | dy=2*dy;\ | ||
627 | dx=2*dx-dy;\ | ||
628 | do {\ | ||
629 | PUTPIXEL();\ | ||
630 | if (a>0) { pp+=(inc_1); a-=dx; }\ | ||
631 | else { pp+=(inc_2); a+=dy; }\ | ||
632 | } while (--n >= 0); | ||
633 | |||
634 | /* fin macro */ | ||
635 | |||
636 | if (dx == 0 && dy == 0) { | ||
637 | PUTPIXEL(); | ||
638 | } else if (dx > 0) { | ||
639 | if (dx >= dy) { | ||
640 | DRAWLINE(dx, dy, sx + 1, 1); | ||
641 | } else { | ||
642 | DRAWLINE(dy, dx, sx + 1, sx); | ||
643 | } | ||
644 | } else { | ||
645 | dx = -dx; | ||
646 | if (dx >= dy) { | ||
647 | DRAWLINE(dx, dy, sx - 1, -1); | ||
648 | } else { | ||
649 | DRAWLINE(dy, dx, sx - 1, sx); | ||
650 | } | ||
651 | } | ||
652 | |||
653 | |||
654 | #undef DRAWLINE | ||
655 | #undef PUTPIXEL | ||
656 | } | ||
657 | } | ||