1 /* -*- Mode: c; c-basic-offset: 4; tab-width: 8; indent-tabs-mode: t; -*- */
3 * Copyright © 2000 SuSE, Inc.
4 * Copyright © 2007 Red Hat, Inc.
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.
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.
23 * Author: Keith Packard, SuSE, Inc.
29 #include "pixman-private.h"
33 static pixman_implementation_t *global_implementation;
35 #ifdef TOOLCHAIN_SUPPORTS_ATTRIBUTE_CONSTRUCTOR
36 static void __attribute__((constructor))
37 pixman_constructor (void)
39 global_implementation = _pixman_choose_implementation ();
43 static force_inline pixman_implementation_t *
44 get_implementation (void)
46 #ifndef TOOLCHAIN_SUPPORTS_ATTRIBUTE_CONSTRUCTOR
47 if (!global_implementation)
48 global_implementation = _pixman_choose_implementation ();
50 return global_implementation;
53 typedef struct operator_info_t operator_info_t;
55 struct operator_info_t
57 uint8_t opaque_info[4];
60 #define PACK(neither, src, dest, both) \
61 {{ (uint8_t)PIXMAN_OP_ ## neither, \
62 (uint8_t)PIXMAN_OP_ ## src, \
63 (uint8_t)PIXMAN_OP_ ## dest, \
64 (uint8_t)PIXMAN_OP_ ## both }}
66 static const operator_info_t operator_table[] =
68 /* Neither Opaque Src Opaque Dst Opaque Both Opaque */
69 PACK (CLEAR, CLEAR, CLEAR, CLEAR),
70 PACK (SRC, SRC, SRC, SRC),
71 PACK (DST, DST, DST, DST),
72 PACK (OVER, SRC, OVER, SRC),
73 PACK (OVER_REVERSE, OVER_REVERSE, DST, DST),
74 PACK (IN, IN, SRC, SRC),
75 PACK (IN_REVERSE, DST, IN_REVERSE, DST),
76 PACK (OUT, OUT, CLEAR, CLEAR),
77 PACK (OUT_REVERSE, CLEAR, OUT_REVERSE, CLEAR),
78 PACK (ATOP, IN, OVER, SRC),
79 PACK (ATOP_REVERSE, OVER_REVERSE, IN_REVERSE, DST),
80 PACK (XOR, OUT, OUT_REVERSE, CLEAR),
81 PACK (ADD, ADD, ADD, ADD),
82 PACK (SATURATE, OVER_REVERSE, DST, DST),
87 PACK (CLEAR, CLEAR, CLEAR, CLEAR),
88 PACK (SRC, SRC, SRC, SRC),
89 PACK (DST, DST, DST, DST),
90 PACK (DISJOINT_OVER, DISJOINT_OVER, DISJOINT_OVER, DISJOINT_OVER),
91 PACK (DISJOINT_OVER_REVERSE, DISJOINT_OVER_REVERSE, DISJOINT_OVER_REVERSE, DISJOINT_OVER_REVERSE),
92 PACK (DISJOINT_IN, DISJOINT_IN, DISJOINT_IN, DISJOINT_IN),
93 PACK (DISJOINT_IN_REVERSE, DISJOINT_IN_REVERSE, DISJOINT_IN_REVERSE, DISJOINT_IN_REVERSE),
94 PACK (DISJOINT_OUT, DISJOINT_OUT, DISJOINT_OUT, DISJOINT_OUT),
95 PACK (DISJOINT_OUT_REVERSE, DISJOINT_OUT_REVERSE, DISJOINT_OUT_REVERSE, DISJOINT_OUT_REVERSE),
96 PACK (DISJOINT_ATOP, DISJOINT_ATOP, DISJOINT_ATOP, DISJOINT_ATOP),
97 PACK (DISJOINT_ATOP_REVERSE, DISJOINT_ATOP_REVERSE, DISJOINT_ATOP_REVERSE, DISJOINT_ATOP_REVERSE),
98 PACK (DISJOINT_XOR, DISJOINT_XOR, DISJOINT_XOR, DISJOINT_XOR),
105 PACK (CLEAR, CLEAR, CLEAR, CLEAR),
106 PACK (SRC, SRC, SRC, SRC),
107 PACK (DST, DST, DST, DST),
108 PACK (CONJOINT_OVER, CONJOINT_OVER, CONJOINT_OVER, CONJOINT_OVER),
109 PACK (CONJOINT_OVER_REVERSE, CONJOINT_OVER_REVERSE, CONJOINT_OVER_REVERSE, CONJOINT_OVER_REVERSE),
110 PACK (CONJOINT_IN, CONJOINT_IN, CONJOINT_IN, CONJOINT_IN),
111 PACK (CONJOINT_IN_REVERSE, CONJOINT_IN_REVERSE, CONJOINT_IN_REVERSE, CONJOINT_IN_REVERSE),
112 PACK (CONJOINT_OUT, CONJOINT_OUT, CONJOINT_OUT, CONJOINT_OUT),
113 PACK (CONJOINT_OUT_REVERSE, CONJOINT_OUT_REVERSE, CONJOINT_OUT_REVERSE, CONJOINT_OUT_REVERSE),
114 PACK (CONJOINT_ATOP, CONJOINT_ATOP, CONJOINT_ATOP, CONJOINT_ATOP),
115 PACK (CONJOINT_ATOP_REVERSE, CONJOINT_ATOP_REVERSE, CONJOINT_ATOP_REVERSE, CONJOINT_ATOP_REVERSE),
116 PACK (CONJOINT_XOR, CONJOINT_XOR, CONJOINT_XOR, CONJOINT_XOR),
123 PACK (MULTIPLY, MULTIPLY, MULTIPLY, MULTIPLY),
124 PACK (SCREEN, SCREEN, SCREEN, SCREEN),
125 PACK (OVERLAY, OVERLAY, OVERLAY, OVERLAY),
126 PACK (DARKEN, DARKEN, DARKEN, DARKEN),
127 PACK (LIGHTEN, LIGHTEN, LIGHTEN, LIGHTEN),
128 PACK (COLOR_DODGE, COLOR_DODGE, COLOR_DODGE, COLOR_DODGE),
129 PACK (COLOR_BURN, COLOR_BURN, COLOR_BURN, COLOR_BURN),
130 PACK (HARD_LIGHT, HARD_LIGHT, HARD_LIGHT, HARD_LIGHT),
131 PACK (SOFT_LIGHT, SOFT_LIGHT, SOFT_LIGHT, SOFT_LIGHT),
132 PACK (DIFFERENCE, DIFFERENCE, DIFFERENCE, DIFFERENCE),
133 PACK (EXCLUSION, EXCLUSION, EXCLUSION, EXCLUSION),
134 PACK (HSL_HUE, HSL_HUE, HSL_HUE, HSL_HUE),
135 PACK (HSL_SATURATION, HSL_SATURATION, HSL_SATURATION, HSL_SATURATION),
136 PACK (HSL_COLOR, HSL_COLOR, HSL_COLOR, HSL_COLOR),
137 PACK (HSL_LUMINOSITY, HSL_LUMINOSITY, HSL_LUMINOSITY, HSL_LUMINOSITY),
141 * Optimize the current operator based on opacity of source or destination
142 * The output operator should be mathematically equivalent to the source.
145 optimize_operator (pixman_op_t op,
150 pixman_bool_t is_source_opaque, is_dest_opaque;
152 #define OPAQUE_SHIFT 13
154 COMPILE_TIME_ASSERT (FAST_PATH_IS_OPAQUE == (1 << OPAQUE_SHIFT));
156 is_dest_opaque = (dst_flags & FAST_PATH_IS_OPAQUE);
157 is_source_opaque = ((src_flags & mask_flags) & FAST_PATH_IS_OPAQUE);
159 is_dest_opaque >>= OPAQUE_SHIFT - 1;
160 is_source_opaque >>= OPAQUE_SHIFT;
162 return operator_table[op].opaque_info[is_dest_opaque | is_source_opaque];
166 * Computing composite region
168 static inline pixman_bool_t
169 clip_general_image (pixman_region32_t * region,
170 pixman_region32_t * clip,
174 if (pixman_region32_n_rects (region) == 1 &&
175 pixman_region32_n_rects (clip) == 1)
177 pixman_box32_t * rbox = pixman_region32_rectangles (region, NULL);
178 pixman_box32_t * cbox = pixman_region32_rectangles (clip, NULL);
181 if (rbox->x1 < (v = cbox->x1 + dx))
183 if (rbox->x2 > (v = cbox->x2 + dx))
185 if (rbox->y1 < (v = cbox->y1 + dy))
187 if (rbox->y2 > (v = cbox->y2 + dy))
189 if (rbox->x1 >= rbox->x2 || rbox->y1 >= rbox->y2)
191 pixman_region32_init (region);
195 else if (!pixman_region32_not_empty (clip))
202 pixman_region32_translate (region, -dx, -dy);
204 if (!pixman_region32_intersect (region, region, clip))
208 pixman_region32_translate (region, dx, dy);
211 return pixman_region32_not_empty (region);
214 static inline pixman_bool_t
215 clip_source_image (pixman_region32_t * region,
216 pixman_image_t * image,
220 /* Source clips are ignored, unless they are explicitly turned on
221 * and the clip in question was set by an X client. (Because if
222 * the clip was not set by a client, then it is a hierarchy
223 * clip and those should always be ignored for sources).
225 if (!image->common.clip_sources || !image->common.client_clip)
228 return clip_general_image (region,
229 &image->common.clip_region,
234 * returns FALSE if the final region is empty. Indistinguishable from
235 * an allocation failure, but rendering ignores those anyways.
238 pixman_compute_composite_region32 (pixman_region32_t * region,
239 pixman_image_t * src_image,
240 pixman_image_t * mask_image,
241 pixman_image_t * dest_image,
251 region->extents.x1 = dest_x;
252 region->extents.x2 = dest_x + width;
253 region->extents.y1 = dest_y;
254 region->extents.y2 = dest_y + height;
256 region->extents.x1 = MAX (region->extents.x1, 0);
257 region->extents.y1 = MAX (region->extents.y1, 0);
258 region->extents.x2 = MIN (region->extents.x2, dest_image->bits.width);
259 region->extents.y2 = MIN (region->extents.y2, dest_image->bits.height);
263 /* Check for empty operation */
264 if (region->extents.x1 >= region->extents.x2 ||
265 region->extents.y1 >= region->extents.y2)
267 region->extents.x1 = 0;
268 region->extents.x2 = 0;
269 region->extents.y1 = 0;
270 region->extents.y2 = 0;
274 if (dest_image->common.have_clip_region)
276 if (!clip_general_image (region, &dest_image->common.clip_region, 0, 0))
280 if (dest_image->common.alpha_map)
282 if (!pixman_region32_intersect_rect (region, region,
283 dest_image->common.alpha_origin_x,
284 dest_image->common.alpha_origin_y,
285 dest_image->common.alpha_map->width,
286 dest_image->common.alpha_map->height))
290 if (!pixman_region32_not_empty (region))
292 if (dest_image->common.alpha_map->common.have_clip_region)
294 if (!clip_general_image (region, &dest_image->common.alpha_map->common.clip_region,
295 -dest_image->common.alpha_origin_x,
296 -dest_image->common.alpha_origin_y))
303 /* clip against src */
304 if (src_image->common.have_clip_region)
306 if (!clip_source_image (region, src_image, dest_x - src_x, dest_y - src_y))
309 if (src_image->common.alpha_map && src_image->common.alpha_map->common.have_clip_region)
311 if (!clip_source_image (region, (pixman_image_t *)src_image->common.alpha_map,
312 dest_x - (src_x - src_image->common.alpha_origin_x),
313 dest_y - (src_y - src_image->common.alpha_origin_y)))
318 /* clip against mask */
319 if (mask_image && mask_image->common.have_clip_region)
321 if (!clip_source_image (region, mask_image, dest_x - mask_x, dest_y - mask_y))
324 if (mask_image->common.alpha_map && mask_image->common.alpha_map->common.have_clip_region)
326 if (!clip_source_image (region, (pixman_image_t *)mask_image->common.alpha_map,
327 dest_x - (mask_x - mask_image->common.alpha_origin_x),
328 dest_y - (mask_y - mask_image->common.alpha_origin_y)))
338 #define N_CACHED_FAST_PATHS 8
344 pixman_implementation_t * imp;
345 pixman_fast_path_t fast_path;
346 } cache [N_CACHED_FAST_PATHS];
349 PIXMAN_DEFINE_THREAD_LOCAL (cache_t, fast_path_cache);
351 static force_inline pixman_bool_t
352 lookup_composite_function (pixman_op_t op,
353 pixman_format_code_t src_format,
355 pixman_format_code_t mask_format,
357 pixman_format_code_t dest_format,
359 pixman_implementation_t **out_imp,
360 pixman_composite_func_t *out_func)
362 pixman_implementation_t *imp;
366 /* Check cache for fast paths */
367 cache = PIXMAN_GET_THREAD_LOCAL (fast_path_cache);
369 for (i = 0; i < N_CACHED_FAST_PATHS; ++i)
371 const pixman_fast_path_t *info = &(cache->cache[i].fast_path);
373 /* Note that we check for equality here, not whether
374 * the cached fast path matches. This is to prevent
375 * us from selecting an overly general fast path
376 * when a more specific one would work.
378 if (info->op == op &&
379 info->src_format == src_format &&
380 info->mask_format == mask_format &&
381 info->dest_format == dest_format &&
382 info->src_flags == src_flags &&
383 info->mask_flags == mask_flags &&
384 info->dest_flags == dest_flags &&
387 *out_imp = cache->cache[i].imp;
388 *out_func = cache->cache[i].fast_path.func;
394 for (imp = get_implementation (); imp != NULL; imp = imp->delegate)
396 const pixman_fast_path_t *info = imp->fast_paths;
398 while (info->op != PIXMAN_OP_NONE)
400 if ((info->op == op || info->op == PIXMAN_OP_any) &&
402 ((info->src_format == src_format) ||
403 (info->src_format == PIXMAN_any)) &&
404 ((info->mask_format == mask_format) ||
405 (info->mask_format == PIXMAN_any)) &&
406 ((info->dest_format == dest_format) ||
407 (info->dest_format == PIXMAN_any)) &&
409 (info->src_flags & src_flags) == info->src_flags &&
410 (info->mask_flags & mask_flags) == info->mask_flags &&
411 (info->dest_flags & dest_flags) == info->dest_flags)
414 *out_func = info->func;
416 /* Set i to the last spot in the cache so that the
417 * move-to-front code below will work
419 i = N_CACHED_FAST_PATHS - 1;
433 cache->cache[i + 1] = cache->cache[i];
435 cache->cache[0].imp = *out_imp;
436 cache->cache[0].fast_path.op = op;
437 cache->cache[0].fast_path.src_format = src_format;
438 cache->cache[0].fast_path.src_flags = src_flags;
439 cache->cache[0].fast_path.mask_format = mask_format;
440 cache->cache[0].fast_path.mask_flags = mask_flags;
441 cache->cache[0].fast_path.dest_format = dest_format;
442 cache->cache[0].fast_path.dest_flags = dest_flags;
443 cache->cache[0].fast_path.func = *out_func;
451 pixman_fixed_48_16_t x1;
452 pixman_fixed_48_16_t y1;
453 pixman_fixed_48_16_t x2;
454 pixman_fixed_48_16_t y2;
458 compute_transformed_extents (pixman_transform_t *transform,
459 const pixman_box32_t *extents,
460 box_48_16_t *transformed)
462 pixman_fixed_48_16_t tx1, ty1, tx2, ty2;
463 pixman_fixed_t x1, y1, x2, y2;
466 x1 = pixman_int_to_fixed (extents->x1) + pixman_fixed_1 / 2;
467 y1 = pixman_int_to_fixed (extents->y1) + pixman_fixed_1 / 2;
468 x2 = pixman_int_to_fixed (extents->x2) - pixman_fixed_1 / 2;
469 y2 = pixman_int_to_fixed (extents->y2) - pixman_fixed_1 / 2;
473 transformed->x1 = x1;
474 transformed->y1 = y1;
475 transformed->x2 = x2;
476 transformed->y2 = y2;
481 tx1 = ty1 = INT64_MAX;
482 tx2 = ty2 = INT64_MIN;
484 for (i = 0; i < 4; ++i)
486 pixman_fixed_48_16_t tx, ty;
489 v.vector[0] = (i & 0x01)? x1 : x2;
490 v.vector[1] = (i & 0x02)? y1 : y2;
491 v.vector[2] = pixman_fixed_1;
493 if (!pixman_transform_point (transform, &v))
496 tx = (pixman_fixed_48_16_t)v.vector[0];
497 ty = (pixman_fixed_48_16_t)v.vector[1];
509 transformed->x1 = tx1;
510 transformed->y1 = ty1;
511 transformed->x2 = tx2;
512 transformed->y2 = ty2;
517 #define IS_16BIT(x) (((x) >= INT16_MIN) && ((x) <= INT16_MAX))
518 #define ABS(f) (((f) < 0)? (-(f)) : (f))
519 #define IS_16_16(f) (((f) >= pixman_min_fixed_48_16 && ((f) <= pixman_max_fixed_48_16)))
522 analyze_extent (pixman_image_t *image,
523 const pixman_box32_t *extents,
526 pixman_transform_t *transform;
527 pixman_fixed_t *params;
528 pixman_fixed_t x_off, y_off;
529 pixman_fixed_t width, height;
530 box_48_16_t transformed;
531 pixman_box32_t exp_extents;
536 /* Some compositing functions walk one step
537 * outside the destination rectangle, so we
538 * check here that the expanded-by-one source
539 * extents in destination space fits in 16 bits
541 if (!IS_16BIT (extents->x1 - 1) ||
542 !IS_16BIT (extents->y1 - 1) ||
543 !IS_16BIT (extents->x2 + 1) ||
544 !IS_16BIT (extents->y2 + 1))
549 transform = image->common.transform;
550 if (image->common.type == BITS)
552 /* During repeat mode calculations we might convert the
553 * width/height of an image to fixed 16.16, so we need
554 * them to be smaller than 16 bits.
556 if (image->bits.width >= 0x7fff || image->bits.height >= 0x7fff)
559 #define ID_AND_NEAREST (FAST_PATH_ID_TRANSFORM | FAST_PATH_NEAREST_FILTER)
561 if ((image->common.flags & ID_AND_NEAREST) == ID_AND_NEAREST &&
564 extents->x2 <= image->bits.width &&
565 extents->y2 <= image->bits.height)
567 *flags |= FAST_PATH_SAMPLES_COVER_CLIP;
571 switch (image->common.filter)
573 case PIXMAN_FILTER_CONVOLUTION:
574 params = image->common.filter_params;
575 x_off = - pixman_fixed_e - ((params[0] - pixman_fixed_1) >> 1);
576 y_off = - pixman_fixed_e - ((params[1] - pixman_fixed_1) >> 1);
581 case PIXMAN_FILTER_GOOD:
582 case PIXMAN_FILTER_BEST:
583 case PIXMAN_FILTER_BILINEAR:
584 x_off = - pixman_fixed_1 / 2;
585 y_off = - pixman_fixed_1 / 2;
586 width = pixman_fixed_1;
587 height = pixman_fixed_1;
590 case PIXMAN_FILTER_FAST:
591 case PIXMAN_FILTER_NEAREST:
592 x_off = - pixman_fixed_e;
593 y_off = - pixman_fixed_e;
610 if (!compute_transformed_extents (transform, extents, &transformed))
613 /* Expand the source area by a tiny bit so account of different rounding that
614 * may happen during sampling. Note that (8 * pixman_fixed_e) is very far from
615 * 0.5 so this won't cause the area computed to be overly pessimistic.
617 transformed.x1 += x_off - 8 * pixman_fixed_e;
618 transformed.y1 += y_off - 8 * pixman_fixed_e;
619 transformed.x2 += x_off + width + 8 * pixman_fixed_e;
620 transformed.y2 += y_off + height + 8 * pixman_fixed_e;
622 if (image->common.type == BITS &&
623 pixman_fixed_to_int (transformed.x1) >= 0 &&
624 pixman_fixed_to_int (transformed.y1) >= 0 &&
625 pixman_fixed_to_int (transformed.x2) < image->bits.width &&
626 pixman_fixed_to_int (transformed.y2) < image->bits.height)
628 *flags |= FAST_PATH_SAMPLES_COVER_CLIP;
631 /* Check we don't overflow when the destination extents are expanded by one.
632 * This ensures that compositing functions can simply walk the source space
633 * using 16.16 variables without worrying about overflow.
635 exp_extents = *extents;
641 if (!compute_transformed_extents (transform, &exp_extents, &transformed))
644 if (!IS_16_16 (transformed.x1 + x_off - 8 * pixman_fixed_e) ||
645 !IS_16_16 (transformed.y1 + y_off - 8 * pixman_fixed_e) ||
646 !IS_16_16 (transformed.x2 + x_off + 8 * pixman_fixed_e + width) ||
647 !IS_16_16 (transformed.y2 + y_off + 8 * pixman_fixed_e + height))
656 * Work around GCC bug causing crashes in Mozilla with SSE2
658 * When using -msse, gcc generates movdqa instructions assuming that
659 * the stack is 16 byte aligned. Unfortunately some applications, such
660 * as Mozilla and Mono, end up aligning the stack to 4 bytes, which
661 * causes the movdqa instructions to fail.
663 * The __force_align_arg_pointer__ makes gcc generate a prologue that
664 * realigns the stack pointer to 16 bytes.
666 * On x86-64 this is not necessary because the standard ABI already
667 * calls for a 16 byte aligned stack.
669 * See https://bugs.freedesktop.org/show_bug.cgi?id=15693
671 #if defined (USE_SSE2) && defined(__GNUC__) && !defined(__x86_64__) && !defined(__amd64__)
672 __attribute__((__force_align_arg_pointer__))
675 pixman_image_composite32 (pixman_op_t op,
676 pixman_image_t * src,
677 pixman_image_t * mask,
678 pixman_image_t * dest,
688 pixman_format_code_t src_format, mask_format, dest_format;
689 uint32_t src_flags, mask_flags, dest_flags;
690 pixman_region32_t region;
691 pixman_box32_t extents;
692 pixman_implementation_t *imp;
693 pixman_composite_func_t func;
695 _pixman_image_validate (src);
697 _pixman_image_validate (mask);
698 _pixman_image_validate (dest);
700 src_format = src->common.extended_format_code;
701 src_flags = src->common.flags;
705 mask_format = mask->common.extended_format_code;
706 mask_flags = mask->common.flags;
710 mask_format = PIXMAN_null;
711 mask_flags = FAST_PATH_IS_OPAQUE;
714 dest_format = dest->common.extended_format_code;
715 dest_flags = dest->common.flags;
717 /* Check for pixbufs */
718 if ((mask_format == PIXMAN_a8r8g8b8 || mask_format == PIXMAN_a8b8g8r8) &&
719 (src->type == BITS && src->bits.bits == mask->bits.bits) &&
720 (src->common.repeat == mask->common.repeat) &&
721 (src_x == mask_x && src_y == mask_y))
723 if (src_format == PIXMAN_x8b8g8r8)
724 src_format = mask_format = PIXMAN_pixbuf;
725 else if (src_format == PIXMAN_x8r8g8b8)
726 src_format = mask_format = PIXMAN_rpixbuf;
729 pixman_region32_init (®ion);
731 if (!pixman_compute_composite_region32 (
732 ®ion, src, mask, dest,
733 src_x, src_y, mask_x, mask_y, dest_x, dest_y, width, height))
738 extents = *pixman_region32_extents (®ion);
740 extents.x1 -= dest_x - src_x;
741 extents.y1 -= dest_y - src_y;
742 extents.x2 -= dest_x - src_x;
743 extents.y2 -= dest_y - src_y;
745 if (!analyze_extent (src, &extents, &src_flags))
748 extents.x1 -= src_x - mask_x;
749 extents.y1 -= src_y - mask_y;
750 extents.x2 -= src_x - mask_x;
751 extents.y2 -= src_y - mask_y;
753 if (!analyze_extent (mask, &extents, &mask_flags))
756 /* If the clip is within the source samples, and the samples are opaque,
757 * then the source is effectively opaque.
759 #define BOTH (FAST_PATH_SAMPLES_OPAQUE | FAST_PATH_SAMPLES_COVER_CLIP)
761 if ((src_flags & BOTH) == BOTH)
762 src_flags |= FAST_PATH_IS_OPAQUE;
764 if ((mask_flags & BOTH) == BOTH)
765 mask_flags |= FAST_PATH_IS_OPAQUE;
768 * Check if we can replace our operator by a simpler one
769 * if the src or dest are opaque. The output operator should be
770 * mathematically equivalent to the source.
772 op = optimize_operator (op, src_flags, mask_flags, dest_flags);
774 if (lookup_composite_function (op,
775 src_format, src_flags,
776 mask_format, mask_flags,
777 dest_format, dest_flags,
780 pixman_composite_info_t info;
781 const pixman_box32_t *pbox;
785 info.src_image = src;
786 info.mask_image = mask;
787 info.dest_image = dest;
789 pbox = pixman_region32_rectangles (®ion, &n);
793 info.src_x = pbox->x1 + src_x - dest_x;
794 info.src_y = pbox->y1 + src_y - dest_y;
795 info.mask_x = pbox->x1 + mask_x - dest_x;
796 info.mask_y = pbox->y1 + mask_y - dest_y;
797 info.dest_x = pbox->x1;
798 info.dest_y = pbox->y1;
799 info.width = pbox->x2 - pbox->x1;
800 info.height = pbox->y2 - pbox->y1;
809 pixman_region32_fini (®ion);
813 pixman_image_composite (pixman_op_t op,
814 pixman_image_t * src,
815 pixman_image_t * mask,
816 pixman_image_t * dest,
826 pixman_image_composite32 (op, src, mask, dest, src_x, src_y,
827 mask_x, mask_y, dest_x, dest_y, width, height);
830 PIXMAN_EXPORT pixman_bool_t
831 pixman_blt (uint32_t *src_bits,
844 return _pixman_implementation_blt (get_implementation(),
845 src_bits, dst_bits, src_stride, dst_stride,
852 PIXMAN_EXPORT pixman_bool_t
853 pixman_fill (uint32_t *bits,
862 return _pixman_implementation_fill (
863 get_implementation(), bits, stride, bpp, x, y, width, height, xor);
867 color_to_uint32 (const pixman_color_t *color)
870 (color->alpha >> 8 << 24) |
871 (color->red >> 8 << 16) |
872 (color->green & 0xff00) |
877 color_to_pixel (pixman_color_t * color,
879 pixman_format_code_t format)
881 uint32_t c = color_to_uint32 (color);
883 if (!(format == PIXMAN_a8r8g8b8 ||
884 format == PIXMAN_x8r8g8b8 ||
885 format == PIXMAN_a8b8g8r8 ||
886 format == PIXMAN_x8b8g8r8 ||
887 format == PIXMAN_b8g8r8a8 ||
888 format == PIXMAN_b8g8r8x8 ||
889 format == PIXMAN_r8g8b8a8 ||
890 format == PIXMAN_r8g8b8x8 ||
891 format == PIXMAN_r5g6b5 ||
892 format == PIXMAN_b5g6r5 ||
893 format == PIXMAN_a8 ||
894 format == PIXMAN_a1))
899 if (PIXMAN_FORMAT_TYPE (format) == PIXMAN_TYPE_ABGR)
901 c = ((c & 0xff000000) >> 0) |
902 ((c & 0x00ff0000) >> 16) |
903 ((c & 0x0000ff00) >> 0) |
904 ((c & 0x000000ff) << 16);
906 if (PIXMAN_FORMAT_TYPE (format) == PIXMAN_TYPE_BGRA)
908 c = ((c & 0xff000000) >> 24) |
909 ((c & 0x00ff0000) >> 8) |
910 ((c & 0x0000ff00) << 8) |
911 ((c & 0x000000ff) << 24);
913 if (PIXMAN_FORMAT_TYPE (format) == PIXMAN_TYPE_RGBA)
914 c = ((c & 0xff000000) >> 24) | (c << 8);
916 if (format == PIXMAN_a1)
918 else if (format == PIXMAN_a8)
920 else if (format == PIXMAN_r5g6b5 ||
921 format == PIXMAN_b5g6r5)
922 c = CONVERT_8888_TO_0565 (c);
925 printf ("color: %x %x %x %x\n", color->alpha, color->red, color->green, color->blue);
926 printf ("pixel: %x\n", c);
933 PIXMAN_EXPORT pixman_bool_t
934 pixman_image_fill_rectangles (pixman_op_t op,
935 pixman_image_t * dest,
936 pixman_color_t * color,
938 const pixman_rectangle16_t *rects)
940 pixman_box32_t stack_boxes[6];
941 pixman_box32_t *boxes;
942 pixman_bool_t result;
947 boxes = pixman_malloc_ab (sizeof (pixman_box32_t), n_rects);
956 for (i = 0; i < n_rects; ++i)
958 boxes[i].x1 = rects[i].x;
959 boxes[i].y1 = rects[i].y;
960 boxes[i].x2 = boxes[i].x1 + rects[i].width;
961 boxes[i].y2 = boxes[i].y1 + rects[i].height;
964 result = pixman_image_fill_boxes (op, dest, color, n_rects, boxes);
966 if (boxes != stack_boxes)
972 PIXMAN_EXPORT pixman_bool_t
973 pixman_image_fill_boxes (pixman_op_t op,
974 pixman_image_t * dest,
975 pixman_color_t * color,
977 const pixman_box32_t *boxes)
979 pixman_image_t *solid;
983 _pixman_image_validate (dest);
985 if (color->alpha == 0xffff)
987 if (op == PIXMAN_OP_OVER)
991 if (op == PIXMAN_OP_CLEAR)
1003 if (op == PIXMAN_OP_SRC)
1007 if (color_to_pixel (color, &pixel, dest->bits.format))
1009 pixman_region32_t fill_region;
1011 pixman_box32_t *rects;
1013 if (!pixman_region32_init_rects (&fill_region, boxes, n_boxes))
1016 if (dest->common.have_clip_region)
1018 if (!pixman_region32_intersect (&fill_region,
1020 &dest->common.clip_region))
1024 rects = pixman_region32_rectangles (&fill_region, &n_rects);
1025 for (j = 0; j < n_rects; ++j)
1027 const pixman_box32_t *rect = &(rects[j]);
1028 pixman_fill (dest->bits.bits, dest->bits.rowstride, PIXMAN_FORMAT_BPP (dest->bits.format),
1029 rect->x1, rect->y1, rect->x2 - rect->x1, rect->y2 - rect->y1,
1033 pixman_region32_fini (&fill_region);
1038 solid = pixman_image_create_solid_fill (color);
1042 for (i = 0; i < n_boxes; ++i)
1044 const pixman_box32_t *box = &(boxes[i]);
1046 pixman_image_composite32 (op, solid, NULL, dest,
1049 box->x2 - box->x1, box->y2 - box->y1);
1052 pixman_image_unref (solid);
1060 * Returns the version of the pixman library encoded in a single
1061 * integer as per %PIXMAN_VERSION_ENCODE. The encoding ensures that
1062 * later versions compare greater than earlier versions.
1064 * A run-time comparison to check that pixman's version is greater than
1065 * or equal to version X.Y.Z could be performed as follows:
1067 * <informalexample><programlisting>
1068 * if (pixman_version() >= PIXMAN_VERSION_ENCODE(X,Y,Z)) {...}
1069 * </programlisting></informalexample>
1071 * See also pixman_version_string() as well as the compile-time
1072 * equivalents %PIXMAN_VERSION and %PIXMAN_VERSION_STRING.
1074 * Return value: the encoded version.
1077 pixman_version (void)
1079 return PIXMAN_VERSION;
1083 * pixman_version_string:
1085 * Returns the version of the pixman library as a human-readable string
1086 * of the form "X.Y.Z".
1088 * See also pixman_version() as well as the compile-time equivalents
1089 * %PIXMAN_VERSION_STRING and %PIXMAN_VERSION.
1091 * Return value: a string containing the version.
1093 PIXMAN_EXPORT const char*
1094 pixman_version_string (void)
1096 return PIXMAN_VERSION_STRING;
1100 * pixman_format_supported_source:
1101 * @format: A pixman_format_code_t format
1103 * Return value: whether the provided format code is a supported
1104 * format for a pixman surface used as a source in
1107 * Currently, all pixman_format_code_t values are supported.
1109 PIXMAN_EXPORT pixman_bool_t
1110 pixman_format_supported_source (pixman_format_code_t format)
1114 /* 32 bpp formats */
1115 case PIXMAN_a2b10g10r10:
1116 case PIXMAN_x2b10g10r10:
1117 case PIXMAN_a2r10g10b10:
1118 case PIXMAN_x2r10g10b10:
1119 case PIXMAN_a8r8g8b8:
1120 case PIXMAN_x8r8g8b8:
1121 case PIXMAN_a8b8g8r8:
1122 case PIXMAN_x8b8g8r8:
1123 case PIXMAN_b8g8r8a8:
1124 case PIXMAN_b8g8r8x8:
1125 case PIXMAN_r8g8b8a8:
1126 case PIXMAN_r8g8b8x8:
1131 case PIXMAN_x14r6g6b6:
1132 /* 16 bpp formats */
1133 case PIXMAN_a1r5g5b5:
1134 case PIXMAN_x1r5g5b5:
1135 case PIXMAN_a1b5g5r5:
1136 case PIXMAN_x1b5g5r5:
1137 case PIXMAN_a4r4g4b4:
1138 case PIXMAN_x4r4g4b4:
1139 case PIXMAN_a4b4g4r4:
1140 case PIXMAN_x4b4g4r4:
1145 case PIXMAN_a2r2g2b2:
1146 case PIXMAN_a2b2g2r2:
1150 /* Collides with PIXMAN_c8
1153 /* Collides with PIXMAN_g8
1160 case PIXMAN_a1r1g1b1:
1161 case PIXMAN_a1b1g1r1:
1178 * pixman_format_supported_destination:
1179 * @format: A pixman_format_code_t format
1181 * Return value: whether the provided format code is a supported
1182 * format for a pixman surface used as a destination in
1185 * Currently, all pixman_format_code_t values are supported
1186 * except for the YUV formats.
1188 PIXMAN_EXPORT pixman_bool_t
1189 pixman_format_supported_destination (pixman_format_code_t format)
1191 /* YUV formats cannot be written to at the moment */
1192 if (format == PIXMAN_yuy2 || format == PIXMAN_yv12)
1195 return pixman_format_supported_source (format);
1198 PIXMAN_EXPORT pixman_bool_t
1199 pixman_compute_composite_region (pixman_region16_t * region,
1200 pixman_image_t * src_image,
1201 pixman_image_t * mask_image,
1202 pixman_image_t * dest_image,
1212 pixman_region32_t r32;
1213 pixman_bool_t retval;
1215 pixman_region32_init (&r32);
1217 retval = pixman_compute_composite_region32 (
1218 &r32, src_image, mask_image, dest_image,
1219 src_x, src_y, mask_x, mask_y, dest_x, dest_y,
1224 if (!pixman_region16_copy_from_region32 (region, &r32))
1228 pixman_region32_fini (&r32);