Line data Source code
1 : /* -*- Mode: c; c-basic-offset: 4; tab-width: 8; indent-tabs-mode: t; -*- */
2 : /*
3 : * Copyright © 2000 SuSE, Inc.
4 : * Copyright © 2007 Red Hat, Inc.
5 : *
6 : * Permission to use, copy, modify, distribute, and sell this software and its
7 : * documentation for any purpose is hereby granted without fee, provided that
8 : * the above copyright notice appear in all copies and that both that
9 : * copyright notice and this permission notice appear in supporting
10 : * documentation, and that the name of SuSE not be used in advertising or
11 : * publicity pertaining to distribution of the software without specific,
12 : * written prior permission. SuSE makes no representations about the
13 : * suitability of this software for any purpose. It is provided "as is"
14 : * without express or implied warranty.
15 : *
16 : * SuSE DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL
17 : * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL SuSE
18 : * BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
19 : * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
20 : * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
21 : * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
22 : *
23 : * Author: Keith Packard, SuSE, Inc.
24 : */
25 :
26 : #ifdef HAVE_CONFIG_H
27 : #include <config.h>
28 : #endif
29 : #include "pixman-private.h"
30 :
31 : #include <stdlib.h>
32 :
33 : pixman_implementation_t *global_implementation;
34 :
35 : #ifdef TOOLCHAIN_SUPPORTS_ATTRIBUTE_CONSTRUCTOR
36 : static void __attribute__((constructor))
37 : pixman_constructor (void)
38 : {
39 : global_implementation = _pixman_choose_implementation ();
40 : }
41 : #endif
42 :
43 : typedef struct operator_info_t operator_info_t;
44 :
45 : struct operator_info_t
46 : {
47 : uint8_t opaque_info[4];
48 : };
49 :
50 : #define PACK(neither, src, dest, both) \
51 : {{ (uint8_t)PIXMAN_OP_ ## neither, \
52 : (uint8_t)PIXMAN_OP_ ## src, \
53 : (uint8_t)PIXMAN_OP_ ## dest, \
54 : (uint8_t)PIXMAN_OP_ ## both }}
55 :
56 : static const operator_info_t operator_table[] =
57 : {
58 : /* Neither Opaque Src Opaque Dst Opaque Both Opaque */
59 : PACK (CLEAR, CLEAR, CLEAR, CLEAR),
60 : PACK (SRC, SRC, SRC, SRC),
61 : PACK (DST, DST, DST, DST),
62 : PACK (OVER, SRC, OVER, SRC),
63 : PACK (OVER_REVERSE, OVER_REVERSE, DST, DST),
64 : PACK (IN, IN, SRC, SRC),
65 : PACK (IN_REVERSE, DST, IN_REVERSE, DST),
66 : PACK (OUT, OUT, CLEAR, CLEAR),
67 : PACK (OUT_REVERSE, CLEAR, OUT_REVERSE, CLEAR),
68 : PACK (ATOP, IN, OVER, SRC),
69 : PACK (ATOP_REVERSE, OVER_REVERSE, IN_REVERSE, DST),
70 : PACK (XOR, OUT, OUT_REVERSE, CLEAR),
71 : PACK (ADD, ADD, ADD, ADD),
72 : PACK (SATURATE, OVER_REVERSE, DST, DST),
73 :
74 : {{ 0 /* 0x0e */ }},
75 : {{ 0 /* 0x0f */ }},
76 :
77 : PACK (CLEAR, CLEAR, CLEAR, CLEAR),
78 : PACK (SRC, SRC, SRC, SRC),
79 : PACK (DST, DST, DST, DST),
80 : PACK (DISJOINT_OVER, DISJOINT_OVER, DISJOINT_OVER, DISJOINT_OVER),
81 : PACK (DISJOINT_OVER_REVERSE, DISJOINT_OVER_REVERSE, DISJOINT_OVER_REVERSE, DISJOINT_OVER_REVERSE),
82 : PACK (DISJOINT_IN, DISJOINT_IN, DISJOINT_IN, DISJOINT_IN),
83 : PACK (DISJOINT_IN_REVERSE, DISJOINT_IN_REVERSE, DISJOINT_IN_REVERSE, DISJOINT_IN_REVERSE),
84 : PACK (DISJOINT_OUT, DISJOINT_OUT, DISJOINT_OUT, DISJOINT_OUT),
85 : PACK (DISJOINT_OUT_REVERSE, DISJOINT_OUT_REVERSE, DISJOINT_OUT_REVERSE, DISJOINT_OUT_REVERSE),
86 : PACK (DISJOINT_ATOP, DISJOINT_ATOP, DISJOINT_ATOP, DISJOINT_ATOP),
87 : PACK (DISJOINT_ATOP_REVERSE, DISJOINT_ATOP_REVERSE, DISJOINT_ATOP_REVERSE, DISJOINT_ATOP_REVERSE),
88 : PACK (DISJOINT_XOR, DISJOINT_XOR, DISJOINT_XOR, DISJOINT_XOR),
89 :
90 : {{ 0 /* 0x1c */ }},
91 : {{ 0 /* 0x1d */ }},
92 : {{ 0 /* 0x1e */ }},
93 : {{ 0 /* 0x1f */ }},
94 :
95 : PACK (CLEAR, CLEAR, CLEAR, CLEAR),
96 : PACK (SRC, SRC, SRC, SRC),
97 : PACK (DST, DST, DST, DST),
98 : PACK (CONJOINT_OVER, CONJOINT_OVER, CONJOINT_OVER, CONJOINT_OVER),
99 : PACK (CONJOINT_OVER_REVERSE, CONJOINT_OVER_REVERSE, CONJOINT_OVER_REVERSE, CONJOINT_OVER_REVERSE),
100 : PACK (CONJOINT_IN, CONJOINT_IN, CONJOINT_IN, CONJOINT_IN),
101 : PACK (CONJOINT_IN_REVERSE, CONJOINT_IN_REVERSE, CONJOINT_IN_REVERSE, CONJOINT_IN_REVERSE),
102 : PACK (CONJOINT_OUT, CONJOINT_OUT, CONJOINT_OUT, CONJOINT_OUT),
103 : PACK (CONJOINT_OUT_REVERSE, CONJOINT_OUT_REVERSE, CONJOINT_OUT_REVERSE, CONJOINT_OUT_REVERSE),
104 : PACK (CONJOINT_ATOP, CONJOINT_ATOP, CONJOINT_ATOP, CONJOINT_ATOP),
105 : PACK (CONJOINT_ATOP_REVERSE, CONJOINT_ATOP_REVERSE, CONJOINT_ATOP_REVERSE, CONJOINT_ATOP_REVERSE),
106 : PACK (CONJOINT_XOR, CONJOINT_XOR, CONJOINT_XOR, CONJOINT_XOR),
107 :
108 : {{ 0 /* 0x2c */ }},
109 : {{ 0 /* 0x2d */ }},
110 : {{ 0 /* 0x2e */ }},
111 : {{ 0 /* 0x2f */ }},
112 :
113 : PACK (MULTIPLY, MULTIPLY, MULTIPLY, MULTIPLY),
114 : PACK (SCREEN, SCREEN, SCREEN, SCREEN),
115 : PACK (OVERLAY, OVERLAY, OVERLAY, OVERLAY),
116 : PACK (DARKEN, DARKEN, DARKEN, DARKEN),
117 : PACK (LIGHTEN, LIGHTEN, LIGHTEN, LIGHTEN),
118 : PACK (COLOR_DODGE, COLOR_DODGE, COLOR_DODGE, COLOR_DODGE),
119 : PACK (COLOR_BURN, COLOR_BURN, COLOR_BURN, COLOR_BURN),
120 : PACK (HARD_LIGHT, HARD_LIGHT, HARD_LIGHT, HARD_LIGHT),
121 : PACK (SOFT_LIGHT, SOFT_LIGHT, SOFT_LIGHT, SOFT_LIGHT),
122 : PACK (DIFFERENCE, DIFFERENCE, DIFFERENCE, DIFFERENCE),
123 : PACK (EXCLUSION, EXCLUSION, EXCLUSION, EXCLUSION),
124 : PACK (HSL_HUE, HSL_HUE, HSL_HUE, HSL_HUE),
125 : PACK (HSL_SATURATION, HSL_SATURATION, HSL_SATURATION, HSL_SATURATION),
126 : PACK (HSL_COLOR, HSL_COLOR, HSL_COLOR, HSL_COLOR),
127 : PACK (HSL_LUMINOSITY, HSL_LUMINOSITY, HSL_LUMINOSITY, HSL_LUMINOSITY),
128 : };
129 :
130 : /*
131 : * Optimize the current operator based on opacity of source or destination
132 : * The output operator should be mathematically equivalent to the source.
133 : */
134 : static pixman_op_t
135 22 : optimize_operator (pixman_op_t op,
136 : uint32_t src_flags,
137 : uint32_t mask_flags,
138 : uint32_t dst_flags)
139 : {
140 : pixman_bool_t is_source_opaque, is_dest_opaque;
141 :
142 : #define OPAQUE_SHIFT 13
143 :
144 : COMPILE_TIME_ASSERT (FAST_PATH_IS_OPAQUE == (1 << OPAQUE_SHIFT));
145 :
146 22 : is_dest_opaque = (dst_flags & FAST_PATH_IS_OPAQUE);
147 22 : is_source_opaque = ((src_flags & mask_flags) & FAST_PATH_IS_OPAQUE);
148 :
149 22 : is_dest_opaque >>= OPAQUE_SHIFT - 1;
150 22 : is_source_opaque >>= OPAQUE_SHIFT;
151 :
152 22 : return operator_table[op].opaque_info[is_dest_opaque | is_source_opaque];
153 : }
154 :
155 : /*
156 : * Computing composite region
157 : */
158 : static inline pixman_bool_t
159 0 : clip_general_image (pixman_region32_t * region,
160 : pixman_region32_t * clip,
161 : int dx,
162 : int dy)
163 : {
164 0 : if (pixman_region32_n_rects (region) == 1 &&
165 0 : pixman_region32_n_rects (clip) == 1)
166 0 : {
167 0 : pixman_box32_t * rbox = pixman_region32_rectangles (region, NULL);
168 0 : pixman_box32_t * cbox = pixman_region32_rectangles (clip, NULL);
169 : int v;
170 :
171 0 : if (rbox->x1 < (v = cbox->x1 + dx))
172 0 : rbox->x1 = v;
173 0 : if (rbox->x2 > (v = cbox->x2 + dx))
174 0 : rbox->x2 = v;
175 0 : if (rbox->y1 < (v = cbox->y1 + dy))
176 0 : rbox->y1 = v;
177 0 : if (rbox->y2 > (v = cbox->y2 + dy))
178 0 : rbox->y2 = v;
179 0 : if (rbox->x1 >= rbox->x2 || rbox->y1 >= rbox->y2)
180 : {
181 0 : pixman_region32_init (region);
182 0 : return FALSE;
183 : }
184 : }
185 0 : else if (!pixman_region32_not_empty (clip))
186 : {
187 0 : return FALSE;
188 : }
189 : else
190 : {
191 0 : if (dx || dy)
192 0 : pixman_region32_translate (region, -dx, -dy);
193 :
194 0 : if (!pixman_region32_intersect (region, region, clip))
195 0 : return FALSE;
196 :
197 0 : if (dx || dy)
198 0 : pixman_region32_translate (region, dx, dy);
199 : }
200 :
201 0 : return pixman_region32_not_empty (region);
202 : }
203 :
204 : static inline pixman_bool_t
205 0 : clip_source_image (pixman_region32_t * region,
206 : pixman_image_t * image,
207 : int dx,
208 : int dy)
209 : {
210 : /* Source clips are ignored, unless they are explicitly turned on
211 : * and the clip in question was set by an X client. (Because if
212 : * the clip was not set by a client, then it is a hierarchy
213 : * clip and those should always be ignored for sources).
214 : */
215 0 : if (!image->common.clip_sources || !image->common.client_clip)
216 0 : return TRUE;
217 :
218 0 : return clip_general_image (region,
219 : &image->common.clip_region,
220 : dx, dy);
221 : }
222 :
223 : /*
224 : * returns FALSE if the final region is empty. Indistinguishable from
225 : * an allocation failure, but rendering ignores those anyways.
226 : */
227 : pixman_bool_t
228 22 : _pixman_compute_composite_region32 (pixman_region32_t * region,
229 : pixman_image_t * src_image,
230 : pixman_image_t * mask_image,
231 : pixman_image_t * dest_image,
232 : int32_t src_x,
233 : int32_t src_y,
234 : int32_t mask_x,
235 : int32_t mask_y,
236 : int32_t dest_x,
237 : int32_t dest_y,
238 : int32_t width,
239 : int32_t height)
240 : {
241 22 : region->extents.x1 = dest_x;
242 22 : region->extents.x2 = dest_x + width;
243 22 : region->extents.y1 = dest_y;
244 22 : region->extents.y2 = dest_y + height;
245 :
246 22 : region->extents.x1 = MAX (region->extents.x1, 0);
247 22 : region->extents.y1 = MAX (region->extents.y1, 0);
248 22 : region->extents.x2 = MIN (region->extents.x2, dest_image->bits.width);
249 22 : region->extents.y2 = MIN (region->extents.y2, dest_image->bits.height);
250 :
251 22 : region->data = 0;
252 :
253 : /* Check for empty operation */
254 44 : if (region->extents.x1 >= region->extents.x2 ||
255 22 : region->extents.y1 >= region->extents.y2)
256 : {
257 0 : region->extents.x1 = 0;
258 0 : region->extents.x2 = 0;
259 0 : region->extents.y1 = 0;
260 0 : region->extents.y2 = 0;
261 0 : return FALSE;
262 : }
263 :
264 22 : if (dest_image->common.have_clip_region)
265 : {
266 0 : if (!clip_general_image (region, &dest_image->common.clip_region, 0, 0))
267 0 : return FALSE;
268 : }
269 :
270 22 : if (dest_image->common.alpha_map)
271 : {
272 0 : if (!pixman_region32_intersect_rect (region, region,
273 : dest_image->common.alpha_origin_x,
274 : dest_image->common.alpha_origin_y,
275 0 : dest_image->common.alpha_map->width,
276 0 : dest_image->common.alpha_map->height))
277 : {
278 0 : return FALSE;
279 : }
280 0 : if (!pixman_region32_not_empty (region))
281 0 : return FALSE;
282 0 : if (dest_image->common.alpha_map->common.have_clip_region)
283 : {
284 0 : if (!clip_general_image (region, &dest_image->common.alpha_map->common.clip_region,
285 0 : -dest_image->common.alpha_origin_x,
286 0 : -dest_image->common.alpha_origin_y))
287 : {
288 0 : return FALSE;
289 : }
290 : }
291 : }
292 :
293 : /* clip against src */
294 22 : if (src_image->common.have_clip_region)
295 : {
296 0 : if (!clip_source_image (region, src_image, dest_x - src_x, dest_y - src_y))
297 0 : return FALSE;
298 : }
299 22 : if (src_image->common.alpha_map && src_image->common.alpha_map->common.have_clip_region)
300 : {
301 0 : if (!clip_source_image (region, (pixman_image_t *)src_image->common.alpha_map,
302 0 : dest_x - (src_x - src_image->common.alpha_origin_x),
303 0 : dest_y - (src_y - src_image->common.alpha_origin_y)))
304 : {
305 0 : return FALSE;
306 : }
307 : }
308 : /* clip against mask */
309 22 : if (mask_image && mask_image->common.have_clip_region)
310 : {
311 0 : if (!clip_source_image (region, mask_image, dest_x - mask_x, dest_y - mask_y))
312 0 : return FALSE;
313 :
314 0 : if (mask_image->common.alpha_map && mask_image->common.alpha_map->common.have_clip_region)
315 : {
316 0 : if (!clip_source_image (region, (pixman_image_t *)mask_image->common.alpha_map,
317 0 : dest_x - (mask_x - mask_image->common.alpha_origin_x),
318 0 : dest_y - (mask_y - mask_image->common.alpha_origin_y)))
319 : {
320 0 : return FALSE;
321 : }
322 : }
323 : }
324 :
325 22 : return TRUE;
326 : }
327 :
328 : typedef struct
329 : {
330 : pixman_fixed_48_16_t x1;
331 : pixman_fixed_48_16_t y1;
332 : pixman_fixed_48_16_t x2;
333 : pixman_fixed_48_16_t y2;
334 : } box_48_16_t;
335 :
336 : static pixman_bool_t
337 0 : compute_transformed_extents (pixman_transform_t *transform,
338 : const pixman_box32_t *extents,
339 : box_48_16_t *transformed)
340 : {
341 : pixman_fixed_48_16_t tx1, ty1, tx2, ty2;
342 : pixman_fixed_t x1, y1, x2, y2;
343 : int i;
344 :
345 0 : x1 = pixman_int_to_fixed (extents->x1) + pixman_fixed_1 / 2;
346 0 : y1 = pixman_int_to_fixed (extents->y1) + pixman_fixed_1 / 2;
347 0 : x2 = pixman_int_to_fixed (extents->x2) - pixman_fixed_1 / 2;
348 0 : y2 = pixman_int_to_fixed (extents->y2) - pixman_fixed_1 / 2;
349 :
350 0 : if (!transform)
351 : {
352 0 : transformed->x1 = x1;
353 0 : transformed->y1 = y1;
354 0 : transformed->x2 = x2;
355 0 : transformed->y2 = y2;
356 :
357 0 : return TRUE;
358 : }
359 :
360 0 : tx1 = ty1 = INT64_MAX;
361 0 : tx2 = ty2 = INT64_MIN;
362 :
363 0 : for (i = 0; i < 4; ++i)
364 : {
365 : pixman_fixed_48_16_t tx, ty;
366 : pixman_vector_t v;
367 :
368 0 : v.vector[0] = (i & 0x01)? x1 : x2;
369 0 : v.vector[1] = (i & 0x02)? y1 : y2;
370 0 : v.vector[2] = pixman_fixed_1;
371 :
372 0 : if (!pixman_transform_point (transform, &v))
373 0 : return FALSE;
374 :
375 0 : tx = (pixman_fixed_48_16_t)v.vector[0];
376 0 : ty = (pixman_fixed_48_16_t)v.vector[1];
377 :
378 0 : if (tx < tx1)
379 0 : tx1 = tx;
380 0 : if (ty < ty1)
381 0 : ty1 = ty;
382 0 : if (tx > tx2)
383 0 : tx2 = tx;
384 0 : if (ty > ty2)
385 0 : ty2 = ty;
386 : }
387 :
388 0 : transformed->x1 = tx1;
389 0 : transformed->y1 = ty1;
390 0 : transformed->x2 = tx2;
391 0 : transformed->y2 = ty2;
392 :
393 0 : return TRUE;
394 : }
395 :
396 : #define IS_16BIT(x) (((x) >= INT16_MIN) && ((x) <= INT16_MAX))
397 : #define ABS(f) (((f) < 0)? (-(f)) : (f))
398 : #define IS_16_16(f) (((f) >= pixman_min_fixed_48_16 && ((f) <= pixman_max_fixed_48_16)))
399 :
400 : static pixman_bool_t
401 44 : analyze_extent (pixman_image_t *image,
402 : const pixman_box32_t *extents,
403 : uint32_t *flags)
404 : {
405 : pixman_transform_t *transform;
406 : pixman_fixed_t x_off, y_off;
407 : pixman_fixed_t width, height;
408 : pixman_fixed_t *params;
409 : box_48_16_t transformed;
410 : pixman_box32_t exp_extents;
411 :
412 44 : if (!image)
413 22 : return TRUE;
414 :
415 : /* Some compositing functions walk one step
416 : * outside the destination rectangle, so we
417 : * check here that the expanded-by-one source
418 : * extents in destination space fits in 16 bits
419 : */
420 44 : if (!IS_16BIT (extents->x1 - 1) ||
421 66 : !IS_16BIT (extents->y1 - 1) ||
422 66 : !IS_16BIT (extents->x2 + 1) ||
423 44 : !IS_16BIT (extents->y2 + 1))
424 : {
425 0 : return FALSE;
426 : }
427 :
428 22 : transform = image->common.transform;
429 22 : if (image->common.type == BITS)
430 : {
431 : /* During repeat mode calculations we might convert the
432 : * width/height of an image to fixed 16.16, so we need
433 : * them to be smaller than 16 bits.
434 : */
435 22 : if (image->bits.width >= 0x7fff || image->bits.height >= 0x7fff)
436 0 : return FALSE;
437 :
438 44 : if ((image->common.flags & FAST_PATH_ID_TRANSFORM) == FAST_PATH_ID_TRANSFORM &&
439 44 : extents->x1 >= 0 &&
440 44 : extents->y1 >= 0 &&
441 44 : extents->x2 <= image->bits.width &&
442 22 : extents->y2 <= image->bits.height)
443 : {
444 22 : *flags |= FAST_PATH_SAMPLES_COVER_CLIP_NEAREST;
445 22 : return TRUE;
446 : }
447 :
448 0 : switch (image->common.filter)
449 : {
450 : case PIXMAN_FILTER_CONVOLUTION:
451 0 : params = image->common.filter_params;
452 0 : x_off = - pixman_fixed_e - ((params[0] - pixman_fixed_1) >> 1);
453 0 : y_off = - pixman_fixed_e - ((params[1] - pixman_fixed_1) >> 1);
454 0 : width = params[0];
455 0 : height = params[1];
456 0 : break;
457 :
458 : case PIXMAN_FILTER_SEPARABLE_CONVOLUTION:
459 0 : params = image->common.filter_params;
460 0 : x_off = - pixman_fixed_e - ((params[0] - pixman_fixed_1) >> 1);
461 0 : y_off = - pixman_fixed_e - ((params[1] - pixman_fixed_1) >> 1);
462 0 : width = params[0];
463 0 : height = params[1];
464 0 : break;
465 :
466 : case PIXMAN_FILTER_GOOD:
467 : case PIXMAN_FILTER_BEST:
468 : case PIXMAN_FILTER_BILINEAR:
469 0 : x_off = - pixman_fixed_1 / 2;
470 0 : y_off = - pixman_fixed_1 / 2;
471 0 : width = pixman_fixed_1;
472 0 : height = pixman_fixed_1;
473 0 : break;
474 :
475 : case PIXMAN_FILTER_FAST:
476 : case PIXMAN_FILTER_NEAREST:
477 0 : x_off = - pixman_fixed_e;
478 0 : y_off = - pixman_fixed_e;
479 0 : width = 0;
480 0 : height = 0;
481 0 : break;
482 :
483 : default:
484 0 : return FALSE;
485 : }
486 : }
487 : else
488 : {
489 0 : x_off = 0;
490 0 : y_off = 0;
491 0 : width = 0;
492 0 : height = 0;
493 : }
494 :
495 0 : if (!compute_transformed_extents (transform, extents, &transformed))
496 0 : return FALSE;
497 :
498 : /* Expand the source area by a tiny bit so account of different rounding that
499 : * may happen during sampling. Note that (8 * pixman_fixed_e) is very far from
500 : * 0.5 so this won't cause the area computed to be overly pessimistic.
501 : */
502 0 : transformed.x1 -= 8 * pixman_fixed_e;
503 0 : transformed.y1 -= 8 * pixman_fixed_e;
504 0 : transformed.x2 += 8 * pixman_fixed_e;
505 0 : transformed.y2 += 8 * pixman_fixed_e;
506 :
507 0 : if (image->common.type == BITS)
508 : {
509 0 : if (pixman_fixed_to_int (transformed.x1) >= 0 &&
510 0 : pixman_fixed_to_int (transformed.y1) >= 0 &&
511 0 : pixman_fixed_to_int (transformed.x2) < image->bits.width &&
512 0 : pixman_fixed_to_int (transformed.y2) < image->bits.height)
513 : {
514 0 : *flags |= FAST_PATH_SAMPLES_COVER_CLIP_NEAREST;
515 : }
516 :
517 0 : if (pixman_fixed_to_int (transformed.x1 - pixman_fixed_1 / 2) >= 0 &&
518 0 : pixman_fixed_to_int (transformed.y1 - pixman_fixed_1 / 2) >= 0 &&
519 0 : pixman_fixed_to_int (transformed.x2 + pixman_fixed_1 / 2) < image->bits.width &&
520 0 : pixman_fixed_to_int (transformed.y2 + pixman_fixed_1 / 2) < image->bits.height)
521 : {
522 0 : *flags |= FAST_PATH_SAMPLES_COVER_CLIP_BILINEAR;
523 : }
524 : }
525 :
526 : /* Check we don't overflow when the destination extents are expanded by one.
527 : * This ensures that compositing functions can simply walk the source space
528 : * using 16.16 variables without worrying about overflow.
529 : */
530 0 : exp_extents = *extents;
531 0 : exp_extents.x1 -= 1;
532 0 : exp_extents.y1 -= 1;
533 0 : exp_extents.x2 += 1;
534 0 : exp_extents.y2 += 1;
535 :
536 0 : if (!compute_transformed_extents (transform, &exp_extents, &transformed))
537 0 : return FALSE;
538 :
539 0 : if (!IS_16_16 (transformed.x1 + x_off - 8 * pixman_fixed_e) ||
540 0 : !IS_16_16 (transformed.y1 + y_off - 8 * pixman_fixed_e) ||
541 0 : !IS_16_16 (transformed.x2 + x_off + 8 * pixman_fixed_e + width) ||
542 0 : !IS_16_16 (transformed.y2 + y_off + 8 * pixman_fixed_e + height))
543 : {
544 0 : return FALSE;
545 : }
546 :
547 0 : return TRUE;
548 : }
549 :
550 : /*
551 : * Work around GCC bug causing crashes in Mozilla with SSE2
552 : *
553 : * When using -msse, gcc generates movdqa instructions assuming that
554 : * the stack is 16 byte aligned. Unfortunately some applications, such
555 : * as Mozilla and Mono, end up aligning the stack to 4 bytes, which
556 : * causes the movdqa instructions to fail.
557 : *
558 : * The __force_align_arg_pointer__ makes gcc generate a prologue that
559 : * realigns the stack pointer to 16 bytes.
560 : *
561 : * On x86-64 this is not necessary because the standard ABI already
562 : * calls for a 16 byte aligned stack.
563 : *
564 : * See https://bugs.freedesktop.org/show_bug.cgi?id=15693
565 : */
566 : #if defined (USE_SSE2) && defined(__GNUC__) && !defined(__x86_64__) && !defined(__amd64__)
567 : __attribute__((__force_align_arg_pointer__))
568 : #endif
569 : PIXMAN_EXPORT void
570 22 : pixman_image_composite32 (pixman_op_t op,
571 : pixman_image_t * src,
572 : pixman_image_t * mask,
573 : pixman_image_t * dest,
574 : int32_t src_x,
575 : int32_t src_y,
576 : int32_t mask_x,
577 : int32_t mask_y,
578 : int32_t dest_x,
579 : int32_t dest_y,
580 : int32_t width,
581 : int32_t height)
582 : {
583 : pixman_format_code_t src_format, mask_format, dest_format;
584 : pixman_region32_t region;
585 : pixman_box32_t extents;
586 : pixman_implementation_t *imp;
587 : pixman_composite_func_t func;
588 : pixman_composite_info_t info;
589 : const pixman_box32_t *pbox;
590 : int n;
591 :
592 22 : _pixman_image_validate (src);
593 22 : if (mask)
594 0 : _pixman_image_validate (mask);
595 22 : _pixman_image_validate (dest);
596 :
597 22 : src_format = src->common.extended_format_code;
598 22 : info.src_flags = src->common.flags;
599 :
600 22 : if (mask && !(mask->common.flags & FAST_PATH_IS_OPAQUE))
601 : {
602 0 : mask_format = mask->common.extended_format_code;
603 0 : info.mask_flags = mask->common.flags;
604 : }
605 : else
606 : {
607 22 : mask_format = PIXMAN_null;
608 22 : info.mask_flags = FAST_PATH_IS_OPAQUE;
609 : }
610 :
611 22 : dest_format = dest->common.extended_format_code;
612 22 : info.dest_flags = dest->common.flags;
613 :
614 : /* Check for pixbufs */
615 22 : if ((mask_format == PIXMAN_a8r8g8b8 || mask_format == PIXMAN_a8b8g8r8) &&
616 0 : (src->type == BITS && src->bits.bits == mask->bits.bits) &&
617 0 : (src->common.repeat == mask->common.repeat) &&
618 0 : (info.src_flags & info.mask_flags & FAST_PATH_ID_TRANSFORM) &&
619 0 : (src_x == mask_x && src_y == mask_y))
620 : {
621 0 : if (src_format == PIXMAN_x8b8g8r8)
622 0 : src_format = mask_format = PIXMAN_pixbuf;
623 0 : else if (src_format == PIXMAN_x8r8g8b8)
624 0 : src_format = mask_format = PIXMAN_rpixbuf;
625 : }
626 :
627 22 : pixman_region32_init (®ion);
628 :
629 22 : if (!_pixman_compute_composite_region32 (
630 : ®ion, src, mask, dest,
631 : src_x, src_y, mask_x, mask_y, dest_x, dest_y, width, height))
632 : {
633 0 : goto out;
634 : }
635 :
636 22 : extents = *pixman_region32_extents (®ion);
637 :
638 22 : extents.x1 -= dest_x - src_x;
639 22 : extents.y1 -= dest_y - src_y;
640 22 : extents.x2 -= dest_x - src_x;
641 22 : extents.y2 -= dest_y - src_y;
642 :
643 22 : if (!analyze_extent (src, &extents, &info.src_flags))
644 0 : goto out;
645 :
646 22 : extents.x1 -= src_x - mask_x;
647 22 : extents.y1 -= src_y - mask_y;
648 22 : extents.x2 -= src_x - mask_x;
649 22 : extents.y2 -= src_y - mask_y;
650 :
651 22 : if (!analyze_extent (mask, &extents, &info.mask_flags))
652 0 : goto out;
653 :
654 : /* If the clip is within the source samples, and the samples are
655 : * opaque, then the source is effectively opaque.
656 : */
657 : #define NEAREST_OPAQUE (FAST_PATH_SAMPLES_OPAQUE | \
658 : FAST_PATH_NEAREST_FILTER | \
659 : FAST_PATH_SAMPLES_COVER_CLIP_NEAREST)
660 : #define BILINEAR_OPAQUE (FAST_PATH_SAMPLES_OPAQUE | \
661 : FAST_PATH_BILINEAR_FILTER | \
662 : FAST_PATH_SAMPLES_COVER_CLIP_BILINEAR)
663 :
664 44 : if ((info.src_flags & NEAREST_OPAQUE) == NEAREST_OPAQUE ||
665 22 : (info.src_flags & BILINEAR_OPAQUE) == BILINEAR_OPAQUE)
666 : {
667 0 : info.src_flags |= FAST_PATH_IS_OPAQUE;
668 : }
669 :
670 44 : if ((info.mask_flags & NEAREST_OPAQUE) == NEAREST_OPAQUE ||
671 22 : (info.mask_flags & BILINEAR_OPAQUE) == BILINEAR_OPAQUE)
672 : {
673 0 : info.mask_flags |= FAST_PATH_IS_OPAQUE;
674 : }
675 :
676 : /*
677 : * Check if we can replace our operator by a simpler one
678 : * if the src or dest are opaque. The output operator should be
679 : * mathematically equivalent to the source.
680 : */
681 22 : info.op = optimize_operator (op, info.src_flags, info.mask_flags, info.dest_flags);
682 :
683 44 : _pixman_implementation_lookup_composite (
684 : get_implementation (), info.op,
685 : src_format, info.src_flags,
686 : mask_format, info.mask_flags,
687 : dest_format, info.dest_flags,
688 : &imp, &func);
689 :
690 22 : info.src_image = src;
691 22 : info.mask_image = mask;
692 22 : info.dest_image = dest;
693 :
694 22 : pbox = pixman_region32_rectangles (®ion, &n);
695 :
696 66 : while (n--)
697 : {
698 22 : info.src_x = pbox->x1 + src_x - dest_x;
699 22 : info.src_y = pbox->y1 + src_y - dest_y;
700 22 : info.mask_x = pbox->x1 + mask_x - dest_x;
701 22 : info.mask_y = pbox->y1 + mask_y - dest_y;
702 22 : info.dest_x = pbox->x1;
703 22 : info.dest_y = pbox->y1;
704 22 : info.width = pbox->x2 - pbox->x1;
705 22 : info.height = pbox->y2 - pbox->y1;
706 :
707 22 : func (imp, &info);
708 :
709 22 : pbox++;
710 : }
711 :
712 : out:
713 22 : pixman_region32_fini (®ion);
714 22 : }
715 :
716 : PIXMAN_EXPORT void
717 0 : pixman_image_composite (pixman_op_t op,
718 : pixman_image_t * src,
719 : pixman_image_t * mask,
720 : pixman_image_t * dest,
721 : int16_t src_x,
722 : int16_t src_y,
723 : int16_t mask_x,
724 : int16_t mask_y,
725 : int16_t dest_x,
726 : int16_t dest_y,
727 : uint16_t width,
728 : uint16_t height)
729 : {
730 0 : pixman_image_composite32 (op, src, mask, dest, src_x, src_y,
731 : mask_x, mask_y, dest_x, dest_y, width, height);
732 0 : }
733 :
734 : PIXMAN_EXPORT pixman_bool_t
735 0 : pixman_blt (uint32_t *src_bits,
736 : uint32_t *dst_bits,
737 : int src_stride,
738 : int dst_stride,
739 : int src_bpp,
740 : int dst_bpp,
741 : int src_x,
742 : int src_y,
743 : int dest_x,
744 : int dest_y,
745 : int width,
746 : int height)
747 : {
748 0 : return _pixman_implementation_blt (get_implementation(),
749 : src_bits, dst_bits, src_stride, dst_stride,
750 : src_bpp, dst_bpp,
751 : src_x, src_y,
752 : dest_x, dest_y,
753 : width, height);
754 : }
755 :
756 : PIXMAN_EXPORT pixman_bool_t
757 0 : pixman_fill (uint32_t *bits,
758 : int stride,
759 : int bpp,
760 : int x,
761 : int y,
762 : int width,
763 : int height,
764 : uint32_t filler)
765 : {
766 0 : return _pixman_implementation_fill (
767 : get_implementation(), bits, stride, bpp, x, y, width, height, filler);
768 : }
769 :
770 : static uint32_t
771 0 : color_to_uint32 (const pixman_color_t *color)
772 : {
773 : return
774 0 : (color->alpha >> 8 << 24) |
775 0 : (color->red >> 8 << 16) |
776 0 : (color->green & 0xff00) |
777 0 : (color->blue >> 8);
778 : }
779 :
780 : static pixman_bool_t
781 0 : color_to_pixel (const pixman_color_t *color,
782 : uint32_t * pixel,
783 : pixman_format_code_t format)
784 : {
785 0 : uint32_t c = color_to_uint32 (color);
786 :
787 0 : if (!(format == PIXMAN_a8r8g8b8 ||
788 0 : format == PIXMAN_x8r8g8b8 ||
789 0 : format == PIXMAN_a8b8g8r8 ||
790 0 : format == PIXMAN_x8b8g8r8 ||
791 0 : format == PIXMAN_b8g8r8a8 ||
792 0 : format == PIXMAN_b8g8r8x8 ||
793 0 : format == PIXMAN_r8g8b8a8 ||
794 0 : format == PIXMAN_r8g8b8x8 ||
795 0 : format == PIXMAN_r5g6b5 ||
796 0 : format == PIXMAN_b5g6r5 ||
797 : format == PIXMAN_a8 ||
798 : format == PIXMAN_a1))
799 : {
800 0 : return FALSE;
801 : }
802 :
803 0 : if (PIXMAN_FORMAT_TYPE (format) == PIXMAN_TYPE_ABGR)
804 : {
805 0 : c = ((c & 0xff000000) >> 0) |
806 0 : ((c & 0x00ff0000) >> 16) |
807 0 : ((c & 0x0000ff00) >> 0) |
808 0 : ((c & 0x000000ff) << 16);
809 : }
810 0 : if (PIXMAN_FORMAT_TYPE (format) == PIXMAN_TYPE_BGRA)
811 : {
812 0 : c = ((c & 0xff000000) >> 24) |
813 0 : ((c & 0x00ff0000) >> 8) |
814 0 : ((c & 0x0000ff00) << 8) |
815 0 : ((c & 0x000000ff) << 24);
816 : }
817 0 : if (PIXMAN_FORMAT_TYPE (format) == PIXMAN_TYPE_RGBA)
818 0 : c = ((c & 0xff000000) >> 24) | (c << 8);
819 :
820 0 : if (format == PIXMAN_a1)
821 0 : c = c >> 31;
822 0 : else if (format == PIXMAN_a8)
823 0 : c = c >> 24;
824 0 : else if (format == PIXMAN_r5g6b5 ||
825 : format == PIXMAN_b5g6r5)
826 0 : c = convert_8888_to_0565 (c);
827 :
828 : #if 0
829 : printf ("color: %x %x %x %x\n", color->alpha, color->red, color->green, color->blue);
830 : printf ("pixel: %x\n", c);
831 : #endif
832 :
833 0 : *pixel = c;
834 0 : return TRUE;
835 : }
836 :
837 : PIXMAN_EXPORT pixman_bool_t
838 0 : pixman_image_fill_rectangles (pixman_op_t op,
839 : pixman_image_t * dest,
840 : const pixman_color_t * color,
841 : int n_rects,
842 : const pixman_rectangle16_t *rects)
843 : {
844 : pixman_box32_t stack_boxes[6];
845 : pixman_box32_t *boxes;
846 : pixman_bool_t result;
847 : int i;
848 :
849 0 : if (n_rects > 6)
850 : {
851 0 : boxes = pixman_malloc_ab (sizeof (pixman_box32_t), n_rects);
852 0 : if (boxes == NULL)
853 0 : return FALSE;
854 : }
855 : else
856 : {
857 0 : boxes = stack_boxes;
858 : }
859 :
860 0 : for (i = 0; i < n_rects; ++i)
861 : {
862 0 : boxes[i].x1 = rects[i].x;
863 0 : boxes[i].y1 = rects[i].y;
864 0 : boxes[i].x2 = boxes[i].x1 + rects[i].width;
865 0 : boxes[i].y2 = boxes[i].y1 + rects[i].height;
866 : }
867 :
868 0 : result = pixman_image_fill_boxes (op, dest, color, n_rects, boxes);
869 :
870 0 : if (boxes != stack_boxes)
871 0 : free (boxes);
872 :
873 0 : return result;
874 : }
875 :
876 : PIXMAN_EXPORT pixman_bool_t
877 0 : pixman_image_fill_boxes (pixman_op_t op,
878 : pixman_image_t * dest,
879 : const pixman_color_t *color,
880 : int n_boxes,
881 : const pixman_box32_t *boxes)
882 : {
883 : pixman_image_t *solid;
884 : pixman_color_t c;
885 : int i;
886 :
887 0 : _pixman_image_validate (dest);
888 :
889 0 : if (color->alpha == 0xffff)
890 : {
891 0 : if (op == PIXMAN_OP_OVER)
892 0 : op = PIXMAN_OP_SRC;
893 : }
894 :
895 0 : if (op == PIXMAN_OP_CLEAR)
896 : {
897 0 : c.red = 0;
898 0 : c.green = 0;
899 0 : c.blue = 0;
900 0 : c.alpha = 0;
901 :
902 0 : color = &c;
903 :
904 0 : op = PIXMAN_OP_SRC;
905 : }
906 :
907 0 : if (op == PIXMAN_OP_SRC)
908 : {
909 : uint32_t pixel;
910 :
911 0 : if (color_to_pixel (color, &pixel, dest->bits.format))
912 : {
913 : pixman_region32_t fill_region;
914 : int n_rects, j;
915 : pixman_box32_t *rects;
916 :
917 0 : if (!pixman_region32_init_rects (&fill_region, boxes, n_boxes))
918 0 : return FALSE;
919 :
920 0 : if (dest->common.have_clip_region)
921 : {
922 0 : if (!pixman_region32_intersect (&fill_region,
923 : &fill_region,
924 : &dest->common.clip_region))
925 0 : return FALSE;
926 : }
927 :
928 0 : rects = pixman_region32_rectangles (&fill_region, &n_rects);
929 0 : for (j = 0; j < n_rects; ++j)
930 : {
931 0 : const pixman_box32_t *rect = &(rects[j]);
932 0 : pixman_fill (dest->bits.bits, dest->bits.rowstride, PIXMAN_FORMAT_BPP (dest->bits.format),
933 0 : rect->x1, rect->y1, rect->x2 - rect->x1, rect->y2 - rect->y1,
934 : pixel);
935 : }
936 :
937 0 : pixman_region32_fini (&fill_region);
938 0 : return TRUE;
939 : }
940 : }
941 :
942 0 : solid = pixman_image_create_solid_fill (color);
943 0 : if (!solid)
944 0 : return FALSE;
945 :
946 0 : for (i = 0; i < n_boxes; ++i)
947 : {
948 0 : const pixman_box32_t *box = &(boxes[i]);
949 :
950 0 : pixman_image_composite32 (op, solid, NULL, dest,
951 : 0, 0, 0, 0,
952 : box->x1, box->y1,
953 0 : box->x2 - box->x1, box->y2 - box->y1);
954 : }
955 :
956 0 : pixman_image_unref (solid);
957 :
958 0 : return TRUE;
959 : }
960 :
961 : /**
962 : * pixman_version:
963 : *
964 : * Returns the version of the pixman library encoded in a single
965 : * integer as per %PIXMAN_VERSION_ENCODE. The encoding ensures that
966 : * later versions compare greater than earlier versions.
967 : *
968 : * A run-time comparison to check that pixman's version is greater than
969 : * or equal to version X.Y.Z could be performed as follows:
970 : *
971 : * <informalexample><programlisting>
972 : * if (pixman_version() >= PIXMAN_VERSION_ENCODE(X,Y,Z)) {...}
973 : * </programlisting></informalexample>
974 : *
975 : * See also pixman_version_string() as well as the compile-time
976 : * equivalents %PIXMAN_VERSION and %PIXMAN_VERSION_STRING.
977 : *
978 : * Return value: the encoded version.
979 : **/
980 : PIXMAN_EXPORT int
981 0 : pixman_version (void)
982 : {
983 0 : return PIXMAN_VERSION;
984 : }
985 :
986 : /**
987 : * pixman_version_string:
988 : *
989 : * Returns the version of the pixman library as a human-readable string
990 : * of the form "X.Y.Z".
991 : *
992 : * See also pixman_version() as well as the compile-time equivalents
993 : * %PIXMAN_VERSION_STRING and %PIXMAN_VERSION.
994 : *
995 : * Return value: a string containing the version.
996 : **/
997 : PIXMAN_EXPORT const char*
998 0 : pixman_version_string (void)
999 : {
1000 0 : return PIXMAN_VERSION_STRING;
1001 : }
1002 :
1003 : /**
1004 : * pixman_format_supported_source:
1005 : * @format: A pixman_format_code_t format
1006 : *
1007 : * Return value: whether the provided format code is a supported
1008 : * format for a pixman surface used as a source in
1009 : * rendering.
1010 : *
1011 : * Currently, all pixman_format_code_t values are supported.
1012 : **/
1013 : PIXMAN_EXPORT pixman_bool_t
1014 0 : pixman_format_supported_source (pixman_format_code_t format)
1015 : {
1016 0 : switch (format)
1017 : {
1018 : /* 32 bpp formats */
1019 : case PIXMAN_a2b10g10r10:
1020 : case PIXMAN_x2b10g10r10:
1021 : case PIXMAN_a2r10g10b10:
1022 : case PIXMAN_x2r10g10b10:
1023 : case PIXMAN_a8r8g8b8:
1024 : case PIXMAN_a8r8g8b8_sRGB:
1025 : case PIXMAN_x8r8g8b8:
1026 : case PIXMAN_a8b8g8r8:
1027 : case PIXMAN_x8b8g8r8:
1028 : case PIXMAN_b8g8r8a8:
1029 : case PIXMAN_b8g8r8x8:
1030 : case PIXMAN_r8g8b8a8:
1031 : case PIXMAN_r8g8b8x8:
1032 : case PIXMAN_r8g8b8:
1033 : case PIXMAN_b8g8r8:
1034 : case PIXMAN_r5g6b5:
1035 : case PIXMAN_b5g6r5:
1036 : case PIXMAN_x14r6g6b6:
1037 : /* 16 bpp formats */
1038 : case PIXMAN_a1r5g5b5:
1039 : case PIXMAN_x1r5g5b5:
1040 : case PIXMAN_a1b5g5r5:
1041 : case PIXMAN_x1b5g5r5:
1042 : case PIXMAN_a4r4g4b4:
1043 : case PIXMAN_x4r4g4b4:
1044 : case PIXMAN_a4b4g4r4:
1045 : case PIXMAN_x4b4g4r4:
1046 : /* 8bpp formats */
1047 : case PIXMAN_a8:
1048 : case PIXMAN_r3g3b2:
1049 : case PIXMAN_b2g3r3:
1050 : case PIXMAN_a2r2g2b2:
1051 : case PIXMAN_a2b2g2r2:
1052 : case PIXMAN_c8:
1053 : case PIXMAN_g8:
1054 : case PIXMAN_x4a4:
1055 : /* Collides with PIXMAN_c8
1056 : case PIXMAN_x4c4:
1057 : */
1058 : /* Collides with PIXMAN_g8
1059 : case PIXMAN_x4g4:
1060 : */
1061 : /* 4bpp formats */
1062 : case PIXMAN_a4:
1063 : case PIXMAN_r1g2b1:
1064 : case PIXMAN_b1g2r1:
1065 : case PIXMAN_a1r1g1b1:
1066 : case PIXMAN_a1b1g1r1:
1067 : case PIXMAN_c4:
1068 : case PIXMAN_g4:
1069 : /* 1bpp formats */
1070 : case PIXMAN_a1:
1071 : case PIXMAN_g1:
1072 : /* YUV formats */
1073 : case PIXMAN_yuy2:
1074 : case PIXMAN_yv12:
1075 0 : return TRUE;
1076 :
1077 : default:
1078 0 : return FALSE;
1079 : }
1080 : }
1081 :
1082 : /**
1083 : * pixman_format_supported_destination:
1084 : * @format: A pixman_format_code_t format
1085 : *
1086 : * Return value: whether the provided format code is a supported
1087 : * format for a pixman surface used as a destination in
1088 : * rendering.
1089 : *
1090 : * Currently, all pixman_format_code_t values are supported
1091 : * except for the YUV formats.
1092 : **/
1093 : PIXMAN_EXPORT pixman_bool_t
1094 0 : pixman_format_supported_destination (pixman_format_code_t format)
1095 : {
1096 : /* YUV formats cannot be written to at the moment */
1097 0 : if (format == PIXMAN_yuy2 || format == PIXMAN_yv12)
1098 0 : return FALSE;
1099 :
1100 0 : return pixman_format_supported_source (format);
1101 : }
1102 :
1103 : PIXMAN_EXPORT pixman_bool_t
1104 0 : pixman_compute_composite_region (pixman_region16_t * region,
1105 : pixman_image_t * src_image,
1106 : pixman_image_t * mask_image,
1107 : pixman_image_t * dest_image,
1108 : int16_t src_x,
1109 : int16_t src_y,
1110 : int16_t mask_x,
1111 : int16_t mask_y,
1112 : int16_t dest_x,
1113 : int16_t dest_y,
1114 : uint16_t width,
1115 : uint16_t height)
1116 : {
1117 : pixman_region32_t r32;
1118 : pixman_bool_t retval;
1119 :
1120 0 : pixman_region32_init (&r32);
1121 :
1122 0 : retval = _pixman_compute_composite_region32 (
1123 : &r32, src_image, mask_image, dest_image,
1124 : src_x, src_y, mask_x, mask_y, dest_x, dest_y,
1125 : width, height);
1126 :
1127 0 : if (retval)
1128 : {
1129 0 : if (!pixman_region16_copy_from_region32 (region, &r32))
1130 0 : retval = FALSE;
1131 : }
1132 :
1133 0 : pixman_region32_fini (&r32);
1134 0 : return retval;
1135 : }
|
