diff options
Diffstat (limited to 'pixman/pixman/pixman.c')
-rw-r--r-- | pixman/pixman/pixman.c | 2466 |
1 files changed, 1245 insertions, 1221 deletions
diff --git a/pixman/pixman/pixman.c b/pixman/pixman/pixman.c index 56c95368e..a27e33b2c 100644 --- a/pixman/pixman/pixman.c +++ b/pixman/pixman/pixman.c @@ -1,1221 +1,1245 @@ -/* -*- Mode: c; c-basic-offset: 4; tab-width: 8; indent-tabs-mode: t; -*- */ -/* - * Copyright © 2000 SuSE, Inc. - * Copyright © 2007 Red Hat, Inc. - * - * Permission to use, copy, modify, distribute, and sell this software and its - * documentation for any purpose is hereby granted without fee, provided that - * the above copyright notice appear in all copies and that both that - * copyright notice and this permission notice appear in supporting - * documentation, and that the name of SuSE not be used in advertising or - * publicity pertaining to distribution of the software without specific, - * written prior permission. SuSE makes no representations about the - * suitability of this software for any purpose. It is provided "as is" - * without express or implied warranty. - * - * SuSE DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL SuSE - * BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES - * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION - * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN - * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. - * - * Author: Keith Packard, SuSE, Inc. - */ - -#ifdef HAVE_CONFIG_H -#include <config.h> -#endif -#include "pixman-private.h" - -#include <stdlib.h> - -static pixman_implementation_t *imp; - -typedef struct operator_info_t operator_info_t; - -struct operator_info_t -{ - uint8_t opaque_info[4]; -}; - -#define PACK(neither, src, dest, both) \ - {{ (uint8_t)PIXMAN_OP_ ## neither, \ - (uint8_t)PIXMAN_OP_ ## src, \ - (uint8_t)PIXMAN_OP_ ## dest, \ - (uint8_t)PIXMAN_OP_ ## both }} - -static const operator_info_t operator_table[] = -{ - /* Neither Opaque Src Opaque Dst Opaque Both Opaque */ - PACK (CLEAR, CLEAR, CLEAR, CLEAR), - PACK (SRC, SRC, SRC, SRC), - PACK (DST, DST, DST, DST), - PACK (OVER, SRC, OVER, SRC), - PACK (OVER_REVERSE, OVER_REVERSE, DST, DST), - PACK (IN, IN, SRC, SRC), - PACK (IN_REVERSE, DST, IN_REVERSE, DST), - PACK (OUT, OUT, CLEAR, CLEAR), - PACK (OUT_REVERSE, CLEAR, OUT_REVERSE, CLEAR), - PACK (ATOP, IN, OVER, SRC), - PACK (ATOP_REVERSE, OVER_REVERSE, IN_REVERSE, DST), - PACK (XOR, OUT, OUT_REVERSE, CLEAR), - PACK (ADD, ADD, ADD, ADD), - PACK (SATURATE, OVER_REVERSE, DST, DST), - - {{ 0 /* 0x0e */ }}, - {{ 0 /* 0x0f */ }}, - - PACK (CLEAR, CLEAR, CLEAR, CLEAR), - PACK (SRC, SRC, SRC, SRC), - PACK (DST, DST, DST, DST), - PACK (DISJOINT_OVER, DISJOINT_OVER, DISJOINT_OVER, DISJOINT_OVER), - PACK (DISJOINT_OVER_REVERSE, DISJOINT_OVER_REVERSE, DISJOINT_OVER_REVERSE, DISJOINT_OVER_REVERSE), - PACK (DISJOINT_IN, DISJOINT_IN, DISJOINT_IN, DISJOINT_IN), - PACK (DISJOINT_IN_REVERSE, DISJOINT_IN_REVERSE, DISJOINT_IN_REVERSE, DISJOINT_IN_REVERSE), - PACK (DISJOINT_OUT, DISJOINT_OUT, DISJOINT_OUT, DISJOINT_OUT), - PACK (DISJOINT_OUT_REVERSE, DISJOINT_OUT_REVERSE, DISJOINT_OUT_REVERSE, DISJOINT_OUT_REVERSE), - PACK (DISJOINT_ATOP, DISJOINT_ATOP, DISJOINT_ATOP, DISJOINT_ATOP), - PACK (DISJOINT_ATOP_REVERSE, DISJOINT_ATOP_REVERSE, DISJOINT_ATOP_REVERSE, DISJOINT_ATOP_REVERSE), - PACK (DISJOINT_XOR, DISJOINT_XOR, DISJOINT_XOR, DISJOINT_XOR), - - {{ 0 /* 0x1c */ }}, - {{ 0 /* 0x1d */ }}, - {{ 0 /* 0x1e */ }}, - {{ 0 /* 0x1f */ }}, - - PACK (CLEAR, CLEAR, CLEAR, CLEAR), - PACK (SRC, SRC, SRC, SRC), - PACK (DST, DST, DST, DST), - PACK (CONJOINT_OVER, CONJOINT_OVER, CONJOINT_OVER, CONJOINT_OVER), - PACK (CONJOINT_OVER_REVERSE, CONJOINT_OVER_REVERSE, CONJOINT_OVER_REVERSE, CONJOINT_OVER_REVERSE), - PACK (CONJOINT_IN, CONJOINT_IN, CONJOINT_IN, CONJOINT_IN), - PACK (CONJOINT_IN_REVERSE, CONJOINT_IN_REVERSE, CONJOINT_IN_REVERSE, CONJOINT_IN_REVERSE), - PACK (CONJOINT_OUT, CONJOINT_OUT, CONJOINT_OUT, CONJOINT_OUT), - PACK (CONJOINT_OUT_REVERSE, CONJOINT_OUT_REVERSE, CONJOINT_OUT_REVERSE, CONJOINT_OUT_REVERSE), - PACK (CONJOINT_ATOP, CONJOINT_ATOP, CONJOINT_ATOP, CONJOINT_ATOP), - PACK (CONJOINT_ATOP_REVERSE, CONJOINT_ATOP_REVERSE, CONJOINT_ATOP_REVERSE, CONJOINT_ATOP_REVERSE), - PACK (CONJOINT_XOR, CONJOINT_XOR, CONJOINT_XOR, CONJOINT_XOR), - - {{ 0 /* 0x2c */ }}, - {{ 0 /* 0x2d */ }}, - {{ 0 /* 0x2e */ }}, - {{ 0 /* 0x2f */ }}, - - PACK (MULTIPLY, MULTIPLY, MULTIPLY, MULTIPLY), - PACK (SCREEN, SCREEN, SCREEN, SCREEN), - PACK (OVERLAY, OVERLAY, OVERLAY, OVERLAY), - PACK (DARKEN, DARKEN, DARKEN, DARKEN), - PACK (LIGHTEN, LIGHTEN, LIGHTEN, LIGHTEN), - PACK (COLOR_DODGE, COLOR_DODGE, COLOR_DODGE, COLOR_DODGE), - PACK (COLOR_BURN, COLOR_BURN, COLOR_BURN, COLOR_BURN), - PACK (HARD_LIGHT, HARD_LIGHT, HARD_LIGHT, HARD_LIGHT), - PACK (SOFT_LIGHT, SOFT_LIGHT, SOFT_LIGHT, SOFT_LIGHT), - PACK (DIFFERENCE, DIFFERENCE, DIFFERENCE, DIFFERENCE), - PACK (EXCLUSION, EXCLUSION, EXCLUSION, EXCLUSION), - PACK (HSL_HUE, HSL_HUE, HSL_HUE, HSL_HUE), - PACK (HSL_SATURATION, HSL_SATURATION, HSL_SATURATION, HSL_SATURATION), - PACK (HSL_COLOR, HSL_COLOR, HSL_COLOR, HSL_COLOR), - PACK (HSL_LUMINOSITY, HSL_LUMINOSITY, HSL_LUMINOSITY, HSL_LUMINOSITY), -}; - -/* - * Optimize the current operator based on opacity of source or destination - * The output operator should be mathematically equivalent to the source. - */ -static pixman_op_t -optimize_operator (pixman_op_t op, - uint32_t src_flags, - uint32_t mask_flags, - uint32_t dst_flags) -{ - pixman_bool_t is_source_opaque, is_dest_opaque; - int opaqueness; - - is_source_opaque = ((src_flags & mask_flags) & FAST_PATH_IS_OPAQUE) != 0; - is_dest_opaque = (dst_flags & FAST_PATH_IS_OPAQUE) != 0; - - opaqueness = ((is_dest_opaque << 1) | is_source_opaque); - - return operator_table[op].opaque_info[opaqueness]; -} - -static void -apply_workaround (pixman_image_t *image, - int32_t * x, - int32_t * y, - uint32_t ** save_bits, - int * save_dx, - int * save_dy) -{ - if (image && (image->common.flags & FAST_PATH_NEEDS_WORKAROUND)) - { - /* Some X servers generate images that point to the - * wrong place in memory, but then set the clip region - * to point to the right place. Because of an old bug - * in pixman, this would actually work. - * - * Here we try and undo the damage - */ - int bpp = PIXMAN_FORMAT_BPP (image->bits.format) / 8; - pixman_box32_t *extents; - uint8_t *t; - int dx, dy; - - extents = pixman_region32_extents (&(image->common.clip_region)); - dx = extents->x1; - dy = extents->y1; - - *save_bits = image->bits.bits; - - *x -= dx; - *y -= dy; - pixman_region32_translate (&(image->common.clip_region), -dx, -dy); - - t = (uint8_t *)image->bits.bits; - t += dy * image->bits.rowstride * 4 + dx * bpp; - image->bits.bits = (uint32_t *)t; - - *save_dx = dx; - *save_dy = dy; - } -} - -static void -unapply_workaround (pixman_image_t *image, uint32_t *bits, int dx, int dy) -{ - if (image && (image->common.flags & FAST_PATH_NEEDS_WORKAROUND)) - { - image->bits.bits = bits; - pixman_region32_translate (&image->common.clip_region, dx, dy); - } -} - -/* - * Computing composite region - */ -static inline pixman_bool_t -clip_general_image (pixman_region32_t * region, - pixman_region32_t * clip, - int dx, - int dy) -{ - if (pixman_region32_n_rects (region) == 1 && - pixman_region32_n_rects (clip) == 1) - { - pixman_box32_t * rbox = pixman_region32_rectangles (region, NULL); - pixman_box32_t * cbox = pixman_region32_rectangles (clip, NULL); - int v; - - if (rbox->x1 < (v = cbox->x1 + dx)) - rbox->x1 = v; - if (rbox->x2 > (v = cbox->x2 + dx)) - rbox->x2 = v; - if (rbox->y1 < (v = cbox->y1 + dy)) - rbox->y1 = v; - if (rbox->y2 > (v = cbox->y2 + dy)) - rbox->y2 = v; - if (rbox->x1 >= rbox->x2 || rbox->y1 >= rbox->y2) - { - pixman_region32_init (region); - return FALSE; - } - } - else if (!pixman_region32_not_empty (clip)) - { - return FALSE; - } - else - { - if (dx || dy) - pixman_region32_translate (region, -dx, -dy); - - if (!pixman_region32_intersect (region, region, clip)) - return FALSE; - - if (dx || dy) - pixman_region32_translate (region, dx, dy); - } - - return pixman_region32_not_empty (region); -} - -static inline pixman_bool_t -clip_source_image (pixman_region32_t * region, - pixman_image_t * image, - int dx, - int dy) -{ - /* Source clips are ignored, unless they are explicitly turned on - * and the clip in question was set by an X client. (Because if - * the clip was not set by a client, then it is a hierarchy - * clip and those should always be ignored for sources). - */ - if (!image->common.clip_sources || !image->common.client_clip) - return TRUE; - - return clip_general_image (region, - &image->common.clip_region, - dx, dy); -} - -/* - * returns FALSE if the final region is empty. Indistinguishable from - * an allocation failure, but rendering ignores those anyways. - */ -static pixman_bool_t -pixman_compute_composite_region32 (pixman_region32_t * region, - pixman_image_t * src_image, - pixman_image_t * mask_image, - pixman_image_t * dst_image, - int32_t src_x, - int32_t src_y, - int32_t mask_x, - int32_t mask_y, - int32_t dest_x, - int32_t dest_y, - int32_t width, - int32_t height) -{ - region->extents.x1 = dest_x; - region->extents.x2 = dest_x + width; - region->extents.y1 = dest_y; - region->extents.y2 = dest_y + height; - - region->extents.x1 = MAX (region->extents.x1, 0); - region->extents.y1 = MAX (region->extents.y1, 0); - region->extents.x2 = MIN (region->extents.x2, dst_image->bits.width); - region->extents.y2 = MIN (region->extents.y2, dst_image->bits.height); - - region->data = 0; - - /* Check for empty operation */ - if (region->extents.x1 >= region->extents.x2 || - region->extents.y1 >= region->extents.y2) - { - pixman_region32_init (region); - return FALSE; - } - - if (dst_image->common.have_clip_region) - { - if (!clip_general_image (region, &dst_image->common.clip_region, 0, 0)) - { - pixman_region32_fini (region); - return FALSE; - } - } - - if (dst_image->common.alpha_map && dst_image->common.alpha_map->common.have_clip_region) - { - if (!clip_general_image (region, &dst_image->common.alpha_map->common.clip_region, - -dst_image->common.alpha_origin_x, - -dst_image->common.alpha_origin_y)) - { - pixman_region32_fini (region); - return FALSE; - } - } - - /* clip against src */ - if (src_image->common.have_clip_region) - { - if (!clip_source_image (region, src_image, dest_x - src_x, dest_y - src_y)) - { - pixman_region32_fini (region); - return FALSE; - } - } - if (src_image->common.alpha_map && src_image->common.alpha_map->common.have_clip_region) - { - if (!clip_source_image (region, (pixman_image_t *)src_image->common.alpha_map, - dest_x - (src_x - src_image->common.alpha_origin_x), - dest_y - (src_y - src_image->common.alpha_origin_y))) - { - pixman_region32_fini (region); - return FALSE; - } - } - /* clip against mask */ - if (mask_image && mask_image->common.have_clip_region) - { - if (!clip_source_image (region, mask_image, dest_x - mask_x, dest_y - mask_y)) - { - pixman_region32_fini (region); - return FALSE; - } - if (mask_image->common.alpha_map && mask_image->common.alpha_map->common.have_clip_region) - { - if (!clip_source_image (region, (pixman_image_t *)mask_image->common.alpha_map, - dest_x - (mask_x - mask_image->common.alpha_origin_x), - dest_y - (mask_y - mask_image->common.alpha_origin_y))) - { - pixman_region32_fini (region); - return FALSE; - } - } - } - - return TRUE; -} - -static void -walk_region_internal (pixman_implementation_t *imp, - pixman_op_t op, - pixman_image_t * src_image, - pixman_image_t * mask_image, - pixman_image_t * dst_image, - int32_t src_x, - int32_t src_y, - int32_t mask_x, - int32_t mask_y, - int32_t dest_x, - int32_t dest_y, - int32_t width, - int32_t height, - pixman_bool_t src_repeat, - pixman_bool_t mask_repeat, - pixman_region32_t * region, - pixman_composite_func_t composite_rect) -{ - int w, h, w_this, h_this; - int x_msk, y_msk, x_src, y_src, x_dst, y_dst; - int src_dy = src_y - dest_y; - int src_dx = src_x - dest_x; - int mask_dy = mask_y - dest_y; - int mask_dx = mask_x - dest_x; - const pixman_box32_t *pbox; - int n; - - pbox = pixman_region32_rectangles (region, &n); - - /* Fast path for non-repeating sources */ - if (!src_repeat && !mask_repeat) - { - while (n--) - { - (*composite_rect) (imp, op, - src_image, mask_image, dst_image, - pbox->x1 + src_dx, - pbox->y1 + src_dy, - pbox->x1 + mask_dx, - pbox->y1 + mask_dy, - pbox->x1, - pbox->y1, - pbox->x2 - pbox->x1, - pbox->y2 - pbox->y1); - - pbox++; - } - - return; - } - - while (n--) - { - h = pbox->y2 - pbox->y1; - y_src = pbox->y1 + src_dy; - y_msk = pbox->y1 + mask_dy; - y_dst = pbox->y1; - - while (h) - { - h_this = h; - w = pbox->x2 - pbox->x1; - x_src = pbox->x1 + src_dx; - x_msk = pbox->x1 + mask_dx; - x_dst = pbox->x1; - - if (mask_repeat) - { - y_msk = MOD (y_msk, mask_image->bits.height); - if (h_this > mask_image->bits.height - y_msk) - h_this = mask_image->bits.height - y_msk; - } - - if (src_repeat) - { - y_src = MOD (y_src, src_image->bits.height); - if (h_this > src_image->bits.height - y_src) - h_this = src_image->bits.height - y_src; - } - - while (w) - { - w_this = w; - - if (mask_repeat) - { - x_msk = MOD (x_msk, mask_image->bits.width); - if (w_this > mask_image->bits.width - x_msk) - w_this = mask_image->bits.width - x_msk; - } - - if (src_repeat) - { - x_src = MOD (x_src, src_image->bits.width); - if (w_this > src_image->bits.width - x_src) - w_this = src_image->bits.width - x_src; - } - - (*composite_rect) (imp, op, - src_image, mask_image, dst_image, - x_src, y_src, x_msk, y_msk, x_dst, y_dst, - w_this, h_this); - w -= w_this; - - x_src += w_this; - x_msk += w_this; - x_dst += w_this; - } - - h -= h_this; - y_src += h_this; - y_msk += h_this; - y_dst += h_this; - } - - pbox++; - } -} - -#define IS_16BIT(x) (((x) >= INT16_MIN) && ((x) <= INT16_MAX)) - -static force_inline uint32_t -compute_src_extents_flags (pixman_image_t *image, - pixman_box32_t *extents, - int x, - int y) -{ - pixman_box16_t extents16; - uint32_t flags; - - flags = FAST_PATH_COVERS_CLIP; - - if (image->common.type != BITS) - return flags; - - if (image->common.repeat == PIXMAN_REPEAT_NONE && - (x > extents->x1 || y > extents->y1 || - x + image->bits.width < extents->x2 || - y + image->bits.height < extents->y2)) - { - flags &= ~FAST_PATH_COVERS_CLIP; - } - - if (IS_16BIT (extents->x1 - x) && - IS_16BIT (extents->y1 - y) && - IS_16BIT (extents->x2 - x) && - IS_16BIT (extents->y2 - y)) - { - extents16.x1 = extents->x1 - x; - extents16.y1 = extents->y1 - y; - extents16.x2 = extents->x2 - x; - extents16.y2 = extents->y2 - y; - - if (!image->common.transform || - pixman_transform_bounds (image->common.transform, &extents16)) - { - if (extents16.x1 >= 0 && extents16.y1 >= 0 && - extents16.x2 <= image->bits.width && - extents16.y2 <= image->bits.height) - { - flags |= FAST_PATH_SAMPLES_COVER_CLIP; - } - } - } - - if (IS_16BIT (extents->x1 - x - 1) && - IS_16BIT (extents->y1 - y - 1) && - IS_16BIT (extents->x2 - x + 1) && - IS_16BIT (extents->y2 - y + 1)) - { - extents16.x1 = extents->x1 - x - 1; - extents16.y1 = extents->y1 - y - 1; - extents16.x2 = extents->x2 - x + 1; - extents16.y2 = extents->y2 - y + 1; - - if (/* src space expanded by one in dest space fits in 16 bit */ - (!image->common.transform || - pixman_transform_bounds (image->common.transform, &extents16)) && - /* And src image size can be used as 16.16 fixed point */ - image->bits.width < 0x7fff && - image->bits.height < 0x7fff) - { - /* Then we're "16bit safe" */ - flags |= FAST_PATH_16BIT_SAFE; - } - } - - return flags; -} - -#define N_CACHED_FAST_PATHS 8 - -typedef struct -{ - pixman_fast_path_t cache [N_CACHED_FAST_PATHS]; -} cache_t; - -PIXMAN_DEFINE_THREAD_LOCAL (cache_t, fast_path_cache); - -static void -do_composite (pixman_implementation_t *imp, - pixman_op_t op, - pixman_image_t *src, - pixman_image_t *mask, - pixman_image_t *dest, - int src_x, - int src_y, - int mask_x, - int mask_y, - int dest_x, - int dest_y, - int width, - int height) -{ - pixman_format_code_t src_format, mask_format, dest_format; - uint32_t src_flags, mask_flags, dest_flags; - pixman_region32_t region; - pixman_box32_t *extents; - uint32_t *src_bits; - int src_dx, src_dy; - uint32_t *mask_bits; - int mask_dx, mask_dy; - uint32_t *dest_bits; - int dest_dx, dest_dy; - pixman_bool_t need_workaround; - const pixman_fast_path_t *info; - cache_t *cache; - int i; - - src_format = src->common.extended_format_code; - src_flags = src->common.flags; - - if (mask) - { - mask_format = mask->common.extended_format_code; - mask_flags = mask->common.flags; - } - else - { - mask_format = PIXMAN_null; - mask_flags = FAST_PATH_IS_OPAQUE; - } - - dest_format = dest->common.extended_format_code; - dest_flags = dest->common.flags; - - /* Check for pixbufs */ - if ((mask_format == PIXMAN_a8r8g8b8 || mask_format == PIXMAN_a8b8g8r8) && - (src->type == BITS && src->bits.bits == mask->bits.bits) && - (src->common.repeat == mask->common.repeat) && - (src_x == mask_x && src_y == mask_y)) - { - if (src_format == PIXMAN_x8b8g8r8) - src_format = mask_format = PIXMAN_pixbuf; - else if (src_format == PIXMAN_x8r8g8b8) - src_format = mask_format = PIXMAN_rpixbuf; - } - - /* Check for workaround */ - need_workaround = (src_flags | mask_flags | dest_flags) & FAST_PATH_NEEDS_WORKAROUND; - - if (need_workaround) - { - apply_workaround (src, &src_x, &src_y, &src_bits, &src_dx, &src_dy); - apply_workaround (mask, &mask_x, &mask_y, &mask_bits, &mask_dx, &mask_dy); - apply_workaround (dest, &dest_x, &dest_y, &dest_bits, &dest_dx, &dest_dy); - } - - pixman_region32_init (®ion); - - if (!pixman_compute_composite_region32 ( - ®ion, src, mask, dest, - src_x, src_y, mask_x, mask_y, dest_x, dest_y, width, height)) - { - return; - } - - extents = pixman_region32_extents (®ion); - - src_flags |= compute_src_extents_flags (src, extents, dest_x - src_x, dest_y - src_y); - - if (mask) - mask_flags |= compute_src_extents_flags (mask, extents, dest_x - mask_x, dest_y - mask_y); - - /* - * Check if we can replace our operator by a simpler one - * if the src or dest are opaque. The output operator should be - * mathematically equivalent to the source. - */ - op = optimize_operator (op, src_flags, mask_flags, dest_flags); - if (op == PIXMAN_OP_DST) - return; - - /* Check cache for fast paths */ - cache = PIXMAN_GET_THREAD_LOCAL (fast_path_cache); - - for (i = 0; i < N_CACHED_FAST_PATHS; ++i) - { - info = &(cache->cache[i]); - - /* Note that we check for equality here, not whether - * the cached fast path matches. This is to prevent - * us from selecting an overly general fast path - * when a more specific one would work. - */ - if (info->op == op && - info->src_format == src_format && - info->mask_format == mask_format && - info->dest_format == dest_format && - info->src_flags == src_flags && - info->mask_flags == mask_flags && - info->dest_flags == dest_flags && - info->func) - { - goto found; - } - } - - while (imp) - { - info = imp->fast_paths; - - while (info->op != PIXMAN_OP_NONE) - { - if ((info->op == op || info->op == PIXMAN_OP_any) && - /* Formats */ - ((info->src_format == src_format) || - (info->src_format == PIXMAN_any)) && - ((info->mask_format == mask_format) || - (info->mask_format == PIXMAN_any)) && - ((info->dest_format == dest_format) || - (info->dest_format == PIXMAN_any)) && - /* Flags */ - (info->src_flags & src_flags) == info->src_flags && - (info->mask_flags & mask_flags) == info->mask_flags && - (info->dest_flags & dest_flags) == info->dest_flags) - { - /* Set i to the last spot in the cache so that the - * move-to-front code below will work - */ - i = N_CACHED_FAST_PATHS - 1; - - goto found; - } - - ++info; - } - - imp = imp->delegate; - } - - /* We didn't find a compositing routine. This should not happen, but if - * it somehow does, just exit rather than crash. - */ - goto out; - -found: - walk_region_internal (imp, op, - src, mask, dest, - src_x, src_y, mask_x, mask_y, - dest_x, dest_y, - width, height, - (src_flags & FAST_PATH_SIMPLE_REPEAT), - (mask_flags & FAST_PATH_SIMPLE_REPEAT), - ®ion, info->func); - - if (i) - { - /* Make a copy of info->func, because info->func may change when - * we update the cache. - */ - pixman_composite_func_t func = info->func; - - while (i--) - cache->cache[i + 1] = cache->cache[i]; - - cache->cache[0].op = op; - cache->cache[0].src_format = src_format; - cache->cache[0].src_flags = src_flags; - cache->cache[0].mask_format = mask_format; - cache->cache[0].mask_flags = mask_flags; - cache->cache[0].dest_format = dest_format; - cache->cache[0].dest_flags = dest_flags; - cache->cache[0].func = func; - } - -out: - if (need_workaround) - { - unapply_workaround (src, src_bits, src_dx, src_dy); - unapply_workaround (mask, mask_bits, mask_dx, mask_dy); - unapply_workaround (dest, dest_bits, dest_dx, dest_dy); - } - - pixman_region32_fini (®ion); -} - -PIXMAN_EXPORT void -pixman_image_composite (pixman_op_t op, - pixman_image_t * src, - pixman_image_t * mask, - pixman_image_t * dest, - int16_t src_x, - int16_t src_y, - int16_t mask_x, - int16_t mask_y, - int16_t dest_x, - int16_t dest_y, - uint16_t width, - uint16_t height) -{ - pixman_image_composite32 (op, src, mask, dest, src_x, src_y, - mask_x, mask_y, dest_x, dest_y, width, height); -} - -/* - * Work around GCC bug causing crashes in Mozilla with SSE2 - * - * When using -msse, gcc generates movdqa instructions assuming that - * the stack is 16 byte aligned. Unfortunately some applications, such - * as Mozilla and Mono, end up aligning the stack to 4 bytes, which - * causes the movdqa instructions to fail. - * - * The __force_align_arg_pointer__ makes gcc generate a prologue that - * realigns the stack pointer to 16 bytes. - * - * On x86-64 this is not necessary because the standard ABI already - * calls for a 16 byte aligned stack. - * - * See https://bugs.freedesktop.org/show_bug.cgi?id=15693 - */ -#if defined (USE_SSE2) && defined(__GNUC__) && !defined(__x86_64__) && !defined(__amd64__) -__attribute__((__force_align_arg_pointer__)) -#endif -PIXMAN_EXPORT void -pixman_image_composite32 (pixman_op_t op, - pixman_image_t * src, - pixman_image_t * mask, - pixman_image_t * dest, - int32_t src_x, - int32_t src_y, - int32_t mask_x, - int32_t mask_y, - int32_t dest_x, - int32_t dest_y, - int32_t width, - int32_t height) -{ - _pixman_image_validate (src); - if (mask) - _pixman_image_validate (mask); - _pixman_image_validate (dest); - - if (!imp) - imp = _pixman_choose_implementation (); - - do_composite (imp, op, - src, mask, dest, - src_x, src_y, - mask_x, mask_y, - dest_x, dest_y, - width, height); -} - -PIXMAN_EXPORT pixman_bool_t -pixman_blt (uint32_t *src_bits, - uint32_t *dst_bits, - int src_stride, - int dst_stride, - int src_bpp, - int dst_bpp, - int src_x, - int src_y, - int dst_x, - int dst_y, - int width, - int height) -{ - if (!imp) - imp = _pixman_choose_implementation (); - - return _pixman_implementation_blt (imp, src_bits, dst_bits, src_stride, dst_stride, - src_bpp, dst_bpp, - src_x, src_y, - dst_x, dst_y, - width, height); -} - -PIXMAN_EXPORT pixman_bool_t -pixman_fill (uint32_t *bits, - int stride, - int bpp, - int x, - int y, - int width, - int height, - uint32_t xor) -{ - if (!imp) - imp = _pixman_choose_implementation (); - - return _pixman_implementation_fill (imp, bits, stride, bpp, x, y, width, height, xor); -} - -static uint32_t -color_to_uint32 (const pixman_color_t *color) -{ - return - (color->alpha >> 8 << 24) | - (color->red >> 8 << 16) | - (color->green & 0xff00) | - (color->blue >> 8); -} - -static pixman_bool_t -color_to_pixel (pixman_color_t * color, - uint32_t * pixel, - pixman_format_code_t format) -{ - uint32_t c = color_to_uint32 (color); - - if (!(format == PIXMAN_a8r8g8b8 || - format == PIXMAN_x8r8g8b8 || - format == PIXMAN_a8b8g8r8 || - format == PIXMAN_x8b8g8r8 || - format == PIXMAN_b8g8r8a8 || - format == PIXMAN_b8g8r8x8 || - format == PIXMAN_r5g6b5 || - format == PIXMAN_b5g6r5 || - format == PIXMAN_a8)) - { - return FALSE; - } - - if (PIXMAN_FORMAT_TYPE (format) == PIXMAN_TYPE_ABGR) - { - c = ((c & 0xff000000) >> 0) | - ((c & 0x00ff0000) >> 16) | - ((c & 0x0000ff00) >> 0) | - ((c & 0x000000ff) << 16); - } - if (PIXMAN_FORMAT_TYPE (format) == PIXMAN_TYPE_BGRA) - { - c = ((c & 0xff000000) >> 24) | - ((c & 0x00ff0000) >> 8) | - ((c & 0x0000ff00) << 8) | - ((c & 0x000000ff) << 24); - } - - if (format == PIXMAN_a8) - c = c >> 24; - else if (format == PIXMAN_r5g6b5 || - format == PIXMAN_b5g6r5) - c = CONVERT_8888_TO_0565 (c); - -#if 0 - printf ("color: %x %x %x %x\n", color->alpha, color->red, color->green, color->blue); - printf ("pixel: %x\n", c); -#endif - - *pixel = c; - return TRUE; -} - -PIXMAN_EXPORT pixman_bool_t -pixman_image_fill_rectangles (pixman_op_t op, - pixman_image_t * dest, - pixman_color_t * color, - int n_rects, - const pixman_rectangle16_t *rects) -{ - pixman_box32_t stack_boxes[6]; - pixman_box32_t *boxes; - pixman_bool_t result; - int i; - - if (n_rects > 6) - { - boxes = pixman_malloc_ab (sizeof (pixman_box32_t), n_rects); - if (boxes == NULL) - return FALSE; - } - else - { - boxes = stack_boxes; - } - - for (i = 0; i < n_rects; ++i) - { - boxes[i].x1 = rects[i].x; - boxes[i].y1 = rects[i].y; - boxes[i].x2 = boxes[i].x1 + rects[i].width; - boxes[i].y2 = boxes[i].y1 + rects[i].height; - } - - result = pixman_image_fill_boxes (op, dest, color, n_rects, boxes); - - if (boxes != stack_boxes) - free (boxes); - - return result; -} - -PIXMAN_EXPORT pixman_bool_t -pixman_image_fill_boxes (pixman_op_t op, - pixman_image_t * dest, - pixman_color_t * color, - int n_boxes, - const pixman_box32_t *boxes) -{ - pixman_image_t *solid; - pixman_color_t c; - int i; - - _pixman_image_validate (dest); - - if (color->alpha == 0xffff) - { - if (op == PIXMAN_OP_OVER) - op = PIXMAN_OP_SRC; - } - - if (op == PIXMAN_OP_CLEAR) - { - c.red = 0; - c.green = 0; - c.blue = 0; - c.alpha = 0; - - color = &c; - - op = PIXMAN_OP_SRC; - } - - if (op == PIXMAN_OP_SRC) - { - uint32_t pixel; - - if (color_to_pixel (color, &pixel, dest->bits.format)) - { - pixman_region32_t fill_region; - int n_rects, j; - pixman_box32_t *rects; - - if (!pixman_region32_init_rects (&fill_region, boxes, n_boxes)) - return FALSE; - - if (dest->common.have_clip_region) - { - if (!pixman_region32_intersect (&fill_region, - &fill_region, - &dest->common.clip_region)) - return FALSE; - } - - rects = pixman_region32_rectangles (&fill_region, &n_rects); - for (j = 0; j < n_rects; ++j) - { - const pixman_box32_t *rect = &(rects[j]); - pixman_fill (dest->bits.bits, dest->bits.rowstride, PIXMAN_FORMAT_BPP (dest->bits.format), - rect->x1, rect->y1, rect->x2 - rect->x1, rect->y2 - rect->y1, - pixel); - } - - pixman_region32_fini (&fill_region); - return TRUE; - } - } - - solid = pixman_image_create_solid_fill (color); - if (!solid) - return FALSE; - - for (i = 0; i < n_boxes; ++i) - { - const pixman_box32_t *box = &(boxes[i]); - - pixman_image_composite32 (op, solid, NULL, dest, - 0, 0, 0, 0, - box->x1, box->y1, - box->x2 - box->x1, box->y2 - box->y1); - } - - pixman_image_unref (solid); - - return TRUE; -} - -/** - * pixman_version: - * - * Returns the version of the pixman library encoded in a single - * integer as per %PIXMAN_VERSION_ENCODE. The encoding ensures that - * later versions compare greater than earlier versions. - * - * A run-time comparison to check that pixman's version is greater than - * or equal to version X.Y.Z could be performed as follows: - * - * <informalexample><programlisting> - * if (pixman_version() >= PIXMAN_VERSION_ENCODE(X,Y,Z)) {...} - * </programlisting></informalexample> - * - * See also pixman_version_string() as well as the compile-time - * equivalents %PIXMAN_VERSION and %PIXMAN_VERSION_STRING. - * - * Return value: the encoded version. - **/ -PIXMAN_EXPORT int -pixman_version (void) -{ - return PIXMAN_VERSION; -} - -/** - * pixman_version_string: - * - * Returns the version of the pixman library as a human-readable string - * of the form "X.Y.Z". - * - * See also pixman_version() as well as the compile-time equivalents - * %PIXMAN_VERSION_STRING and %PIXMAN_VERSION. - * - * Return value: a string containing the version. - **/ -PIXMAN_EXPORT const char* -pixman_version_string (void) -{ - return PIXMAN_VERSION_STRING; -} - -/** - * pixman_format_supported_source: - * @format: A pixman_format_code_t format - * - * Return value: whether the provided format code is a supported - * format for a pixman surface used as a source in - * rendering. - * - * Currently, all pixman_format_code_t values are supported. - **/ -PIXMAN_EXPORT pixman_bool_t -pixman_format_supported_source (pixman_format_code_t format) -{ - switch (format) - { - /* 32 bpp formats */ - case PIXMAN_a2b10g10r10: - case PIXMAN_x2b10g10r10: - case PIXMAN_a2r10g10b10: - case PIXMAN_x2r10g10b10: - case PIXMAN_a8r8g8b8: - case PIXMAN_x8r8g8b8: - case PIXMAN_a8b8g8r8: - case PIXMAN_x8b8g8r8: - case PIXMAN_b8g8r8a8: - case PIXMAN_b8g8r8x8: - case PIXMAN_r8g8b8: - case PIXMAN_b8g8r8: - case PIXMAN_r5g6b5: - case PIXMAN_b5g6r5: - /* 16 bpp formats */ - case PIXMAN_a1r5g5b5: - case PIXMAN_x1r5g5b5: - case PIXMAN_a1b5g5r5: - case PIXMAN_x1b5g5r5: - case PIXMAN_a4r4g4b4: - case PIXMAN_x4r4g4b4: - case PIXMAN_a4b4g4r4: - case PIXMAN_x4b4g4r4: - /* 8bpp formats */ - case PIXMAN_a8: - case PIXMAN_r3g3b2: - case PIXMAN_b2g3r3: - case PIXMAN_a2r2g2b2: - case PIXMAN_a2b2g2r2: - case PIXMAN_c8: - case PIXMAN_g8: - case PIXMAN_x4a4: - /* Collides with PIXMAN_c8 - case PIXMAN_x4c4: - */ - /* Collides with PIXMAN_g8 - case PIXMAN_x4g4: - */ - /* 4bpp formats */ - case PIXMAN_a4: - case PIXMAN_r1g2b1: - case PIXMAN_b1g2r1: - case PIXMAN_a1r1g1b1: - case PIXMAN_a1b1g1r1: - case PIXMAN_c4: - case PIXMAN_g4: - /* 1bpp formats */ - case PIXMAN_a1: - case PIXMAN_g1: - /* YUV formats */ - case PIXMAN_yuy2: - case PIXMAN_yv12: - return TRUE; - - default: - return FALSE; - } -} - -/** - * pixman_format_supported_destination: - * @format: A pixman_format_code_t format - * - * Return value: whether the provided format code is a supported - * format for a pixman surface used as a destination in - * rendering. - * - * Currently, all pixman_format_code_t values are supported - * except for the YUV formats. - **/ -PIXMAN_EXPORT pixman_bool_t -pixman_format_supported_destination (pixman_format_code_t format) -{ - /* YUV formats cannot be written to at the moment */ - if (format == PIXMAN_yuy2 || format == PIXMAN_yv12) - return FALSE; - - return pixman_format_supported_source (format); -} - -PIXMAN_EXPORT pixman_bool_t -pixman_compute_composite_region (pixman_region16_t * region, - pixman_image_t * src_image, - pixman_image_t * mask_image, - pixman_image_t * dst_image, - int16_t src_x, - int16_t src_y, - int16_t mask_x, - int16_t mask_y, - int16_t dest_x, - int16_t dest_y, - uint16_t width, - uint16_t height) -{ - pixman_region32_t r32; - pixman_bool_t retval; - - pixman_region32_init (&r32); - - retval = pixman_compute_composite_region32 ( - &r32, src_image, mask_image, dst_image, - src_x, src_y, mask_x, mask_y, dest_x, dest_y, - width, height); - - if (retval) - { - if (!pixman_region16_copy_from_region32 (region, &r32)) - retval = FALSE; - } - - pixman_region32_fini (&r32); - return retval; -} +/* -*- Mode: c; c-basic-offset: 4; tab-width: 8; indent-tabs-mode: t; -*- */
+/*
+ * Copyright © 2000 SuSE, Inc.
+ * Copyright © 2007 Red Hat, Inc.
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation, and that the name of SuSE not be used in advertising or
+ * publicity pertaining to distribution of the software without specific,
+ * written prior permission. SuSE makes no representations about the
+ * suitability of this software for any purpose. It is provided "as is"
+ * without express or implied warranty.
+ *
+ * SuSE DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL SuSE
+ * BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
+ * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+ * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ * Author: Keith Packard, SuSE, Inc.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+#include "pixman-private.h"
+
+#include <stdlib.h>
+
+static force_inline pixman_implementation_t *
+get_implementation (void)
+{
+ static pixman_implementation_t *global_implementation;
+
+ if (!global_implementation)
+ global_implementation = _pixman_choose_implementation ();
+
+ return global_implementation;
+}
+
+typedef struct operator_info_t operator_info_t;
+
+struct operator_info_t
+{
+ uint8_t opaque_info[4];
+};
+
+#define PACK(neither, src, dest, both) \
+ {{ (uint8_t)PIXMAN_OP_ ## neither, \
+ (uint8_t)PIXMAN_OP_ ## src, \
+ (uint8_t)PIXMAN_OP_ ## dest, \
+ (uint8_t)PIXMAN_OP_ ## both }}
+
+static const operator_info_t operator_table[] =
+{
+ /* Neither Opaque Src Opaque Dst Opaque Both Opaque */
+ PACK (CLEAR, CLEAR, CLEAR, CLEAR),
+ PACK (SRC, SRC, SRC, SRC),
+ PACK (DST, DST, DST, DST),
+ PACK (OVER, SRC, OVER, SRC),
+ PACK (OVER_REVERSE, OVER_REVERSE, DST, DST),
+ PACK (IN, IN, SRC, SRC),
+ PACK (IN_REVERSE, DST, IN_REVERSE, DST),
+ PACK (OUT, OUT, CLEAR, CLEAR),
+ PACK (OUT_REVERSE, CLEAR, OUT_REVERSE, CLEAR),
+ PACK (ATOP, IN, OVER, SRC),
+ PACK (ATOP_REVERSE, OVER_REVERSE, IN_REVERSE, DST),
+ PACK (XOR, OUT, OUT_REVERSE, CLEAR),
+ PACK (ADD, ADD, ADD, ADD),
+ PACK (SATURATE, OVER_REVERSE, DST, DST),
+
+ {{ 0 /* 0x0e */ }},
+ {{ 0 /* 0x0f */ }},
+
+ PACK (CLEAR, CLEAR, CLEAR, CLEAR),
+ PACK (SRC, SRC, SRC, SRC),
+ PACK (DST, DST, DST, DST),
+ PACK (DISJOINT_OVER, DISJOINT_OVER, DISJOINT_OVER, DISJOINT_OVER),
+ PACK (DISJOINT_OVER_REVERSE, DISJOINT_OVER_REVERSE, DISJOINT_OVER_REVERSE, DISJOINT_OVER_REVERSE),
+ PACK (DISJOINT_IN, DISJOINT_IN, DISJOINT_IN, DISJOINT_IN),
+ PACK (DISJOINT_IN_REVERSE, DISJOINT_IN_REVERSE, DISJOINT_IN_REVERSE, DISJOINT_IN_REVERSE),
+ PACK (DISJOINT_OUT, DISJOINT_OUT, DISJOINT_OUT, DISJOINT_OUT),
+ PACK (DISJOINT_OUT_REVERSE, DISJOINT_OUT_REVERSE, DISJOINT_OUT_REVERSE, DISJOINT_OUT_REVERSE),
+ PACK (DISJOINT_ATOP, DISJOINT_ATOP, DISJOINT_ATOP, DISJOINT_ATOP),
+ PACK (DISJOINT_ATOP_REVERSE, DISJOINT_ATOP_REVERSE, DISJOINT_ATOP_REVERSE, DISJOINT_ATOP_REVERSE),
+ PACK (DISJOINT_XOR, DISJOINT_XOR, DISJOINT_XOR, DISJOINT_XOR),
+
+ {{ 0 /* 0x1c */ }},
+ {{ 0 /* 0x1d */ }},
+ {{ 0 /* 0x1e */ }},
+ {{ 0 /* 0x1f */ }},
+
+ PACK (CLEAR, CLEAR, CLEAR, CLEAR),
+ PACK (SRC, SRC, SRC, SRC),
+ PACK (DST, DST, DST, DST),
+ PACK (CONJOINT_OVER, CONJOINT_OVER, CONJOINT_OVER, CONJOINT_OVER),
+ PACK (CONJOINT_OVER_REVERSE, CONJOINT_OVER_REVERSE, CONJOINT_OVER_REVERSE, CONJOINT_OVER_REVERSE),
+ PACK (CONJOINT_IN, CONJOINT_IN, CONJOINT_IN, CONJOINT_IN),
+ PACK (CONJOINT_IN_REVERSE, CONJOINT_IN_REVERSE, CONJOINT_IN_REVERSE, CONJOINT_IN_REVERSE),
+ PACK (CONJOINT_OUT, CONJOINT_OUT, CONJOINT_OUT, CONJOINT_OUT),
+ PACK (CONJOINT_OUT_REVERSE, CONJOINT_OUT_REVERSE, CONJOINT_OUT_REVERSE, CONJOINT_OUT_REVERSE),
+ PACK (CONJOINT_ATOP, CONJOINT_ATOP, CONJOINT_ATOP, CONJOINT_ATOP),
+ PACK (CONJOINT_ATOP_REVERSE, CONJOINT_ATOP_REVERSE, CONJOINT_ATOP_REVERSE, CONJOINT_ATOP_REVERSE),
+ PACK (CONJOINT_XOR, CONJOINT_XOR, CONJOINT_XOR, CONJOINT_XOR),
+
+ {{ 0 /* 0x2c */ }},
+ {{ 0 /* 0x2d */ }},
+ {{ 0 /* 0x2e */ }},
+ {{ 0 /* 0x2f */ }},
+
+ PACK (MULTIPLY, MULTIPLY, MULTIPLY, MULTIPLY),
+ PACK (SCREEN, SCREEN, SCREEN, SCREEN),
+ PACK (OVERLAY, OVERLAY, OVERLAY, OVERLAY),
+ PACK (DARKEN, DARKEN, DARKEN, DARKEN),
+ PACK (LIGHTEN, LIGHTEN, LIGHTEN, LIGHTEN),
+ PACK (COLOR_DODGE, COLOR_DODGE, COLOR_DODGE, COLOR_DODGE),
+ PACK (COLOR_BURN, COLOR_BURN, COLOR_BURN, COLOR_BURN),
+ PACK (HARD_LIGHT, HARD_LIGHT, HARD_LIGHT, HARD_LIGHT),
+ PACK (SOFT_LIGHT, SOFT_LIGHT, SOFT_LIGHT, SOFT_LIGHT),
+ PACK (DIFFERENCE, DIFFERENCE, DIFFERENCE, DIFFERENCE),
+ PACK (EXCLUSION, EXCLUSION, EXCLUSION, EXCLUSION),
+ PACK (HSL_HUE, HSL_HUE, HSL_HUE, HSL_HUE),
+ PACK (HSL_SATURATION, HSL_SATURATION, HSL_SATURATION, HSL_SATURATION),
+ PACK (HSL_COLOR, HSL_COLOR, HSL_COLOR, HSL_COLOR),
+ PACK (HSL_LUMINOSITY, HSL_LUMINOSITY, HSL_LUMINOSITY, HSL_LUMINOSITY),
+};
+
+/*
+ * Optimize the current operator based on opacity of source or destination
+ * The output operator should be mathematically equivalent to the source.
+ */
+static pixman_op_t
+optimize_operator (pixman_op_t op,
+ uint32_t src_flags,
+ uint32_t mask_flags,
+ uint32_t dst_flags)
+{
+ pixman_bool_t is_source_opaque, is_dest_opaque;
+ int opaqueness;
+
+ is_source_opaque = ((src_flags & mask_flags) & FAST_PATH_IS_OPAQUE) != 0;
+ is_dest_opaque = (dst_flags & FAST_PATH_IS_OPAQUE) != 0;
+
+ opaqueness = ((is_dest_opaque << 1) | is_source_opaque);
+
+ return operator_table[op].opaque_info[opaqueness];
+}
+
+static void
+apply_workaround (pixman_image_t *image,
+ int32_t * x,
+ int32_t * y,
+ uint32_t ** save_bits,
+ int * save_dx,
+ int * save_dy)
+{
+ if (image && (image->common.flags & FAST_PATH_NEEDS_WORKAROUND))
+ {
+ /* Some X servers generate images that point to the
+ * wrong place in memory, but then set the clip region
+ * to point to the right place. Because of an old bug
+ * in pixman, this would actually work.
+ *
+ * Here we try and undo the damage
+ */
+ int bpp = PIXMAN_FORMAT_BPP (image->bits.format) / 8;
+ pixman_box32_t *extents;
+ uint8_t *t;
+ int dx, dy;
+
+ extents = pixman_region32_extents (&(image->common.clip_region));
+ dx = extents->x1;
+ dy = extents->y1;
+
+ *save_bits = image->bits.bits;
+
+ *x -= dx;
+ *y -= dy;
+ pixman_region32_translate (&(image->common.clip_region), -dx, -dy);
+
+ t = (uint8_t *)image->bits.bits;
+ t += dy * image->bits.rowstride * 4 + dx * bpp;
+ image->bits.bits = (uint32_t *)t;
+
+ *save_dx = dx;
+ *save_dy = dy;
+ }
+}
+
+static void
+unapply_workaround (pixman_image_t *image, uint32_t *bits, int dx, int dy)
+{
+ if (image && (image->common.flags & FAST_PATH_NEEDS_WORKAROUND))
+ {
+ image->bits.bits = bits;
+ pixman_region32_translate (&image->common.clip_region, dx, dy);
+ }
+}
+
+/*
+ * Computing composite region
+ */
+static inline pixman_bool_t
+clip_general_image (pixman_region32_t * region,
+ pixman_region32_t * clip,
+ int dx,
+ int dy)
+{
+ if (pixman_region32_n_rects (region) == 1 &&
+ pixman_region32_n_rects (clip) == 1)
+ {
+ pixman_box32_t * rbox = pixman_region32_rectangles (region, NULL);
+ pixman_box32_t * cbox = pixman_region32_rectangles (clip, NULL);
+ int v;
+
+ if (rbox->x1 < (v = cbox->x1 + dx))
+ rbox->x1 = v;
+ if (rbox->x2 > (v = cbox->x2 + dx))
+ rbox->x2 = v;
+ if (rbox->y1 < (v = cbox->y1 + dy))
+ rbox->y1 = v;
+ if (rbox->y2 > (v = cbox->y2 + dy))
+ rbox->y2 = v;
+ if (rbox->x1 >= rbox->x2 || rbox->y1 >= rbox->y2)
+ {
+ pixman_region32_init (region);
+ return FALSE;
+ }
+ }
+ else if (!pixman_region32_not_empty (clip))
+ {
+ return FALSE;
+ }
+ else
+ {
+ if (dx || dy)
+ pixman_region32_translate (region, -dx, -dy);
+
+ if (!pixman_region32_intersect (region, region, clip))
+ return FALSE;
+
+ if (dx || dy)
+ pixman_region32_translate (region, dx, dy);
+ }
+
+ return pixman_region32_not_empty (region);
+}
+
+static inline pixman_bool_t
+clip_source_image (pixman_region32_t * region,
+ pixman_image_t * image,
+ int dx,
+ int dy)
+{
+ /* Source clips are ignored, unless they are explicitly turned on
+ * and the clip in question was set by an X client. (Because if
+ * the clip was not set by a client, then it is a hierarchy
+ * clip and those should always be ignored for sources).
+ */
+ if (!image->common.clip_sources || !image->common.client_clip)
+ return TRUE;
+
+ return clip_general_image (region,
+ &image->common.clip_region,
+ dx, dy);
+}
+
+/*
+ * returns FALSE if the final region is empty. Indistinguishable from
+ * an allocation failure, but rendering ignores those anyways.
+ */
+static pixman_bool_t
+pixman_compute_composite_region32 (pixman_region32_t * region,
+ pixman_image_t * src_image,
+ pixman_image_t * mask_image,
+ pixman_image_t * dst_image,
+ int32_t src_x,
+ int32_t src_y,
+ int32_t mask_x,
+ int32_t mask_y,
+ int32_t dest_x,
+ int32_t dest_y,
+ int32_t width,
+ int32_t height)
+{
+ region->extents.x1 = dest_x;
+ region->extents.x2 = dest_x + width;
+ region->extents.y1 = dest_y;
+ region->extents.y2 = dest_y + height;
+
+ region->extents.x1 = MAX (region->extents.x1, 0);
+ region->extents.y1 = MAX (region->extents.y1, 0);
+ region->extents.x2 = MIN (region->extents.x2, dst_image->bits.width);
+ region->extents.y2 = MIN (region->extents.y2, dst_image->bits.height);
+
+ region->data = 0;
+
+ /* Check for empty operation */
+ if (region->extents.x1 >= region->extents.x2 ||
+ region->extents.y1 >= region->extents.y2)
+ {
+ pixman_region32_init (region);
+ return FALSE;
+ }
+
+ if (dst_image->common.have_clip_region)
+ {
+ if (!clip_general_image (region, &dst_image->common.clip_region, 0, 0))
+ {
+ pixman_region32_fini (region);
+ return FALSE;
+ }
+ }
+
+ if (dst_image->common.alpha_map && dst_image->common.alpha_map->common.have_clip_region)
+ {
+ if (!clip_general_image (region, &dst_image->common.alpha_map->common.clip_region,
+ -dst_image->common.alpha_origin_x,
+ -dst_image->common.alpha_origin_y))
+ {
+ pixman_region32_fini (region);
+ return FALSE;
+ }
+ }
+
+ /* clip against src */
+ if (src_image->common.have_clip_region)
+ {
+ if (!clip_source_image (region, src_image, dest_x - src_x, dest_y - src_y))
+ {
+ pixman_region32_fini (region);
+ return FALSE;
+ }
+ }
+ if (src_image->common.alpha_map && src_image->common.alpha_map->common.have_clip_region)
+ {
+ if (!clip_source_image (region, (pixman_image_t *)src_image->common.alpha_map,
+ dest_x - (src_x - src_image->common.alpha_origin_x),
+ dest_y - (src_y - src_image->common.alpha_origin_y)))
+ {
+ pixman_region32_fini (region);
+ return FALSE;
+ }
+ }
+ /* clip against mask */
+ if (mask_image && mask_image->common.have_clip_region)
+ {
+ if (!clip_source_image (region, mask_image, dest_x - mask_x, dest_y - mask_y))
+ {
+ pixman_region32_fini (region);
+ return FALSE;
+ }
+ if (mask_image->common.alpha_map && mask_image->common.alpha_map->common.have_clip_region)
+ {
+ if (!clip_source_image (region, (pixman_image_t *)mask_image->common.alpha_map,
+ dest_x - (mask_x - mask_image->common.alpha_origin_x),
+ dest_y - (mask_y - mask_image->common.alpha_origin_y)))
+ {
+ pixman_region32_fini (region);
+ return FALSE;
+ }
+ }
+ }
+
+ return TRUE;
+}
+
+static void
+walk_region_internal (pixman_implementation_t *imp,
+ pixman_op_t op,
+ pixman_image_t * src_image,
+ pixman_image_t * mask_image,
+ pixman_image_t * dst_image,
+ int32_t src_x,
+ int32_t src_y,
+ int32_t mask_x,
+ int32_t mask_y,
+ int32_t dest_x,
+ int32_t dest_y,
+ int32_t width,
+ int32_t height,
+ pixman_bool_t src_repeat,
+ pixman_bool_t mask_repeat,
+ pixman_region32_t * region,
+ pixman_composite_func_t composite_rect)
+{
+ int w, h, w_this, h_this;
+ int x_msk, y_msk, x_src, y_src, x_dst, y_dst;
+ int src_dy = src_y - dest_y;
+ int src_dx = src_x - dest_x;
+ int mask_dy = mask_y - dest_y;
+ int mask_dx = mask_x - dest_x;
+ const pixman_box32_t *pbox;
+ int n;
+
+ pbox = pixman_region32_rectangles (region, &n);
+
+ /* Fast path for non-repeating sources */
+ if (!src_repeat && !mask_repeat)
+ {
+ while (n--)
+ {
+ (*composite_rect) (imp, op,
+ src_image, mask_image, dst_image,
+ pbox->x1 + src_dx,
+ pbox->y1 + src_dy,
+ pbox->x1 + mask_dx,
+ pbox->y1 + mask_dy,
+ pbox->x1,
+ pbox->y1,
+ pbox->x2 - pbox->x1,
+ pbox->y2 - pbox->y1);
+
+ pbox++;
+ }
+
+ return;
+ }
+
+ while (n--)
+ {
+ h = pbox->y2 - pbox->y1;
+ y_src = pbox->y1 + src_dy;
+ y_msk = pbox->y1 + mask_dy;
+ y_dst = pbox->y1;
+
+ while (h)
+ {
+ h_this = h;
+ w = pbox->x2 - pbox->x1;
+ x_src = pbox->x1 + src_dx;
+ x_msk = pbox->x1 + mask_dx;
+ x_dst = pbox->x1;
+
+ if (mask_repeat)
+ {
+ y_msk = MOD (y_msk, mask_image->bits.height);
+ if (h_this > mask_image->bits.height - y_msk)
+ h_this = mask_image->bits.height - y_msk;
+ }
+
+ if (src_repeat)
+ {
+ y_src = MOD (y_src, src_image->bits.height);
+ if (h_this > src_image->bits.height - y_src)
+ h_this = src_image->bits.height - y_src;
+ }
+
+ while (w)
+ {
+ w_this = w;
+
+ if (mask_repeat)
+ {
+ x_msk = MOD (x_msk, mask_image->bits.width);
+ if (w_this > mask_image->bits.width - x_msk)
+ w_this = mask_image->bits.width - x_msk;
+ }
+
+ if (src_repeat)
+ {
+ x_src = MOD (x_src, src_image->bits.width);
+ if (w_this > src_image->bits.width - x_src)
+ w_this = src_image->bits.width - x_src;
+ }
+
+ (*composite_rect) (imp, op,
+ src_image, mask_image, dst_image,
+ x_src, y_src, x_msk, y_msk, x_dst, y_dst,
+ w_this, h_this);
+ w -= w_this;
+
+ x_src += w_this;
+ x_msk += w_this;
+ x_dst += w_this;
+ }
+
+ h -= h_this;
+ y_src += h_this;
+ y_msk += h_this;
+ y_dst += h_this;
+ }
+
+ pbox++;
+ }
+}
+
+#define IS_16BIT(x) (((x) >= INT16_MIN) && ((x) <= INT16_MAX))
+
+static force_inline uint32_t
+compute_src_extents_flags (pixman_image_t *image,
+ pixman_box32_t *extents,
+ int x,
+ int y)
+{
+ pixman_box16_t extents16;
+ uint32_t flags;
+
+ flags = FAST_PATH_COVERS_CLIP;
+
+ if (image->common.type != BITS)
+ return flags;
+
+ if (image->common.repeat == PIXMAN_REPEAT_NONE &&
+ (x > extents->x1 || y > extents->y1 ||
+ x + image->bits.width < extents->x2 ||
+ y + image->bits.height < extents->y2))
+ {
+ flags &= ~FAST_PATH_COVERS_CLIP;
+ }
+
+ if (IS_16BIT (extents->x1 - x) &&
+ IS_16BIT (extents->y1 - y) &&
+ IS_16BIT (extents->x2 - x) &&
+ IS_16BIT (extents->y2 - y))
+ {
+ extents16.x1 = extents->x1 - x;
+ extents16.y1 = extents->y1 - y;
+ extents16.x2 = extents->x2 - x;
+ extents16.y2 = extents->y2 - y;
+
+ if (!image->common.transform ||
+ pixman_transform_bounds (image->common.transform, &extents16))
+ {
+ if (extents16.x1 >= 0 && extents16.y1 >= 0 &&
+ extents16.x2 <= image->bits.width &&
+ extents16.y2 <= image->bits.height)
+ {
+ flags |= FAST_PATH_SAMPLES_COVER_CLIP;
+ }
+ }
+ }
+
+ if (IS_16BIT (extents->x1 - x - 1) &&
+ IS_16BIT (extents->y1 - y - 1) &&
+ IS_16BIT (extents->x2 - x + 1) &&
+ IS_16BIT (extents->y2 - y + 1))
+ {
+ extents16.x1 = extents->x1 - x - 1;
+ extents16.y1 = extents->y1 - y - 1;
+ extents16.x2 = extents->x2 - x + 1;
+ extents16.y2 = extents->y2 - y + 1;
+
+ if (/* src space expanded by one in dest space fits in 16 bit */
+ (!image->common.transform ||
+ pixman_transform_bounds (image->common.transform, &extents16)) &&
+ /* And src image size can be used as 16.16 fixed point */
+ image->bits.width < 0x7fff &&
+ image->bits.height < 0x7fff)
+ {
+ /* Then we're "16bit safe" */
+ flags |= FAST_PATH_16BIT_SAFE;
+ }
+ }
+
+ return flags;
+}
+
+#define N_CACHED_FAST_PATHS 8
+
+typedef struct
+{
+ struct
+ {
+ pixman_implementation_t * imp;
+ pixman_fast_path_t fast_path;
+ } cache [N_CACHED_FAST_PATHS];
+} cache_t;
+
+PIXMAN_DEFINE_THREAD_LOCAL (cache_t, fast_path_cache);
+
+static force_inline void
+lookup_composite_function (pixman_op_t op,
+ pixman_format_code_t src_format,
+ uint32_t src_flags,
+ pixman_format_code_t mask_format,
+ uint32_t mask_flags,
+ pixman_format_code_t dest_format,
+ uint32_t dest_flags,
+ pixman_implementation_t **out_imp,
+ pixman_composite_func_t *out_func)
+{
+ pixman_implementation_t *imp;
+ cache_t *cache;
+ int i;
+
+ /* Check cache for fast paths */
+ cache = PIXMAN_GET_THREAD_LOCAL (fast_path_cache);
+
+ for (i = 0; i < N_CACHED_FAST_PATHS; ++i)
+ {
+ const pixman_fast_path_t *info = &(cache->cache[i].fast_path);
+
+ /* Note that we check for equality here, not whether
+ * the cached fast path matches. This is to prevent
+ * us from selecting an overly general fast path
+ * when a more specific one would work.
+ */
+ if (info->op == op &&
+ info->src_format == src_format &&
+ info->mask_format == mask_format &&
+ info->dest_format == dest_format &&
+ info->src_flags == src_flags &&
+ info->mask_flags == mask_flags &&
+ info->dest_flags == dest_flags &&
+ info->func)
+ {
+ *out_imp = cache->cache[i].imp;
+ *out_func = cache->cache[i].fast_path.func;
+
+ goto update_cache;
+ }
+ }
+
+ for (imp = get_implementation (); imp != NULL; imp = imp->delegate)
+ {
+ const pixman_fast_path_t *info = imp->fast_paths;
+
+ while (info->op != PIXMAN_OP_NONE)
+ {
+ if ((info->op == op || info->op == PIXMAN_OP_any) &&
+ /* Formats */
+ ((info->src_format == src_format) ||
+ (info->src_format == PIXMAN_any)) &&
+ ((info->mask_format == mask_format) ||
+ (info->mask_format == PIXMAN_any)) &&
+ ((info->dest_format == dest_format) ||
+ (info->dest_format == PIXMAN_any)) &&
+ /* Flags */
+ (info->src_flags & src_flags) == info->src_flags &&
+ (info->mask_flags & mask_flags) == info->mask_flags &&
+ (info->dest_flags & dest_flags) == info->dest_flags)
+ {
+ *out_imp = imp;
+ *out_func = info->func;
+
+ /* Set i to the last spot in the cache so that the
+ * move-to-front code below will work
+ */
+ i = N_CACHED_FAST_PATHS - 1;
+
+ goto update_cache;
+ }
+
+ ++info;
+ }
+ }
+ return;
+
+update_cache:
+ if (i)
+ {
+ while (i--)
+ cache->cache[i + 1] = cache->cache[i];
+
+ cache->cache[0].imp = *out_imp;
+ cache->cache[0].fast_path.op = op;
+ cache->cache[0].fast_path.src_format = src_format;
+ cache->cache[0].fast_path.src_flags = src_flags;
+ cache->cache[0].fast_path.mask_format = mask_format;
+ cache->cache[0].fast_path.mask_flags = mask_flags;
+ cache->cache[0].fast_path.dest_format = dest_format;
+ cache->cache[0].fast_path.dest_flags = dest_flags;
+ cache->cache[0].fast_path.func = *out_func;
+ }
+}
+
+
+static void
+do_composite (pixman_op_t op,
+ pixman_image_t *src,
+ pixman_image_t *mask,
+ pixman_image_t *dest,
+ int src_x,
+ int src_y,
+ int mask_x,
+ int mask_y,
+ int dest_x,
+ int dest_y,
+ int width,
+ int height)
+{
+ pixman_format_code_t src_format, mask_format, dest_format;
+ uint32_t src_flags, mask_flags, dest_flags;
+ pixman_region32_t region;
+ pixman_box32_t *extents;
+ uint32_t *src_bits;
+ int src_dx, src_dy;
+ uint32_t *mask_bits;
+ int mask_dx, mask_dy;
+ uint32_t *dest_bits;
+ int dest_dx, dest_dy;
+ pixman_bool_t need_workaround;
+ pixman_implementation_t *imp;
+ pixman_composite_func_t func;
+
+ src_format = src->common.extended_format_code;
+ src_flags = src->common.flags;
+
+ if (mask)
+ {
+ mask_format = mask->common.extended_format_code;
+ mask_flags = mask->common.flags;
+ }
+ else
+ {
+ mask_format = PIXMAN_null;
+ mask_flags = FAST_PATH_IS_OPAQUE;
+ }
+
+ dest_format = dest->common.extended_format_code;
+ dest_flags = dest->common.flags;
+
+ /* Check for pixbufs */
+ if ((mask_format == PIXMAN_a8r8g8b8 || mask_format == PIXMAN_a8b8g8r8) &&
+ (src->type == BITS && src->bits.bits == mask->bits.bits) &&
+ (src->common.repeat == mask->common.repeat) &&
+ (src_x == mask_x && src_y == mask_y))
+ {
+ if (src_format == PIXMAN_x8b8g8r8)
+ src_format = mask_format = PIXMAN_pixbuf;
+ else if (src_format == PIXMAN_x8r8g8b8)
+ src_format = mask_format = PIXMAN_rpixbuf;
+ }
+
+ /* Check for workaround */
+ need_workaround = (src_flags | mask_flags | dest_flags) & FAST_PATH_NEEDS_WORKAROUND;
+
+ if (need_workaround)
+ {
+ apply_workaround (src, &src_x, &src_y, &src_bits, &src_dx, &src_dy);
+ apply_workaround (mask, &mask_x, &mask_y, &mask_bits, &mask_dx, &mask_dy);
+ apply_workaround (dest, &dest_x, &dest_y, &dest_bits, &dest_dx, &dest_dy);
+ }
+
+ pixman_region32_init (®ion);
+
+ if (!pixman_compute_composite_region32 (
+ ®ion, src, mask, dest,
+ src_x, src_y, mask_x, mask_y, dest_x, dest_y, width, height))
+ {
+ goto out;
+ }
+
+ extents = pixman_region32_extents (®ion);
+
+ src_flags |= compute_src_extents_flags (src, extents, dest_x - src_x, dest_y - src_y);
+
+ if (mask)
+ mask_flags |= compute_src_extents_flags (mask, extents, dest_x - mask_x, dest_y - mask_y);
+
+ /*
+ * Check if we can replace our operator by a simpler one
+ * if the src or dest are opaque. The output operator should be
+ * mathematically equivalent to the source.
+ */
+ op = optimize_operator (op, src_flags, mask_flags, dest_flags);
+ if (op == PIXMAN_OP_DST)
+ goto out;
+
+ lookup_composite_function (op,
+ src_format, src_flags,
+ mask_format, mask_flags,
+ dest_format, dest_flags,
+ &imp, &func);
+
+ walk_region_internal (imp, op,
+ src, mask, dest,
+ src_x, src_y, mask_x, mask_y,
+ dest_x, dest_y,
+ width, height,
+ (src_flags & FAST_PATH_SIMPLE_REPEAT),
+ (mask_flags & FAST_PATH_SIMPLE_REPEAT),
+ ®ion, func);
+
+out:
+ if (need_workaround)
+ {
+ unapply_workaround (src, src_bits, src_dx, src_dy);
+ unapply_workaround (mask, mask_bits, mask_dx, mask_dy);
+ unapply_workaround (dest, dest_bits, dest_dx, dest_dy);
+ }
+
+ pixman_region32_fini (®ion);
+}
+
+PIXMAN_EXPORT void
+pixman_image_composite (pixman_op_t op,
+ pixman_image_t * src,
+ pixman_image_t * mask,
+ pixman_image_t * dest,
+ int16_t src_x,
+ int16_t src_y,
+ int16_t mask_x,
+ int16_t mask_y,
+ int16_t dest_x,
+ int16_t dest_y,
+ uint16_t width,
+ uint16_t height)
+{
+ pixman_image_composite32 (op, src, mask, dest, src_x, src_y,
+ mask_x, mask_y, dest_x, dest_y, width, height);
+}
+
+/*
+ * Work around GCC bug causing crashes in Mozilla with SSE2
+ *
+ * When using -msse, gcc generates movdqa instructions assuming that
+ * the stack is 16 byte aligned. Unfortunately some applications, such
+ * as Mozilla and Mono, end up aligning the stack to 4 bytes, which
+ * causes the movdqa instructions to fail.
+ *
+ * The __force_align_arg_pointer__ makes gcc generate a prologue that
+ * realigns the stack pointer to 16 bytes.
+ *
+ * On x86-64 this is not necessary because the standard ABI already
+ * calls for a 16 byte aligned stack.
+ *
+ * See https://bugs.freedesktop.org/show_bug.cgi?id=15693
+ */
+#if defined (USE_SSE2) && defined(__GNUC__) && !defined(__x86_64__) && !defined(__amd64__)
+__attribute__((__force_align_arg_pointer__))
+#endif
+PIXMAN_EXPORT void
+pixman_image_composite32 (pixman_op_t op,
+ pixman_image_t * src,
+ pixman_image_t * mask,
+ pixman_image_t * dest,
+ int32_t src_x,
+ int32_t src_y,
+ int32_t mask_x,
+ int32_t mask_y,
+ int32_t dest_x,
+ int32_t dest_y,
+ int32_t width,
+ int32_t height)
+{
+ _pixman_image_validate (src);
+ if (mask)
+ _pixman_image_validate (mask);
+ _pixman_image_validate (dest);
+
+ do_composite (op,
+ src, mask, dest,
+ src_x, src_y,
+ mask_x, mask_y,
+ dest_x, dest_y,
+ width, height);
+}
+
+PIXMAN_EXPORT pixman_bool_t
+pixman_blt (uint32_t *src_bits,
+ uint32_t *dst_bits,
+ int src_stride,
+ int dst_stride,
+ int src_bpp,
+ int dst_bpp,
+ int src_x,
+ int src_y,
+ int dst_x,
+ int dst_y,
+ int width,
+ int height)
+{
+ return _pixman_implementation_blt (get_implementation(),
+ src_bits, dst_bits, src_stride, dst_stride,
+ src_bpp, dst_bpp,
+ src_x, src_y,
+ dst_x, dst_y,
+ width, height);
+}
+
+PIXMAN_EXPORT pixman_bool_t
+pixman_fill (uint32_t *bits,
+ int stride,
+ int bpp,
+ int x,
+ int y,
+ int width,
+ int height,
+ uint32_t xor)
+{
+ return _pixman_implementation_fill (
+ get_implementation(), bits, stride, bpp, x, y, width, height, xor);
+}
+
+static uint32_t
+color_to_uint32 (const pixman_color_t *color)
+{
+ return
+ (color->alpha >> 8 << 24) |
+ (color->red >> 8 << 16) |
+ (color->green & 0xff00) |
+ (color->blue >> 8);
+}
+
+static pixman_bool_t
+color_to_pixel (pixman_color_t * color,
+ uint32_t * pixel,
+ pixman_format_code_t format)
+{
+ uint32_t c = color_to_uint32 (color);
+
+ if (!(format == PIXMAN_a8r8g8b8 ||
+ format == PIXMAN_x8r8g8b8 ||
+ format == PIXMAN_a8b8g8r8 ||
+ format == PIXMAN_x8b8g8r8 ||
+ format == PIXMAN_b8g8r8a8 ||
+ format == PIXMAN_b8g8r8x8 ||
+ format == PIXMAN_r5g6b5 ||
+ format == PIXMAN_b5g6r5 ||
+ format == PIXMAN_a8))
+ {
+ return FALSE;
+ }
+
+ if (PIXMAN_FORMAT_TYPE (format) == PIXMAN_TYPE_ABGR)
+ {
+ c = ((c & 0xff000000) >> 0) |
+ ((c & 0x00ff0000) >> 16) |
+ ((c & 0x0000ff00) >> 0) |
+ ((c & 0x000000ff) << 16);
+ }
+ if (PIXMAN_FORMAT_TYPE (format) == PIXMAN_TYPE_BGRA)
+ {
+ c = ((c & 0xff000000) >> 24) |
+ ((c & 0x00ff0000) >> 8) |
+ ((c & 0x0000ff00) << 8) |
+ ((c & 0x000000ff) << 24);
+ }
+
+ if (format == PIXMAN_a8)
+ c = c >> 24;
+ else if (format == PIXMAN_r5g6b5 ||
+ format == PIXMAN_b5g6r5)
+ c = CONVERT_8888_TO_0565 (c);
+
+#if 0
+ printf ("color: %x %x %x %x\n", color->alpha, color->red, color->green, color->blue);
+ printf ("pixel: %x\n", c);
+#endif
+
+ *pixel = c;
+ return TRUE;
+}
+
+PIXMAN_EXPORT pixman_bool_t
+pixman_image_fill_rectangles (pixman_op_t op,
+ pixman_image_t * dest,
+ pixman_color_t * color,
+ int n_rects,
+ const pixman_rectangle16_t *rects)
+{
+ pixman_box32_t stack_boxes[6];
+ pixman_box32_t *boxes;
+ pixman_bool_t result;
+ int i;
+
+ if (n_rects > 6)
+ {
+ boxes = pixman_malloc_ab (sizeof (pixman_box32_t), n_rects);
+ if (boxes == NULL)
+ return FALSE;
+ }
+ else
+ {
+ boxes = stack_boxes;
+ }
+
+ for (i = 0; i < n_rects; ++i)
+ {
+ boxes[i].x1 = rects[i].x;
+ boxes[i].y1 = rects[i].y;
+ boxes[i].x2 = boxes[i].x1 + rects[i].width;
+ boxes[i].y2 = boxes[i].y1 + rects[i].height;
+ }
+
+ result = pixman_image_fill_boxes (op, dest, color, n_rects, boxes);
+
+ if (boxes != stack_boxes)
+ free (boxes);
+
+ return result;
+}
+
+PIXMAN_EXPORT pixman_bool_t
+pixman_image_fill_boxes (pixman_op_t op,
+ pixman_image_t * dest,
+ pixman_color_t * color,
+ int n_boxes,
+ const pixman_box32_t *boxes)
+{
+ pixman_image_t *solid;
+ pixman_color_t c;
+ int i;
+
+ _pixman_image_validate (dest);
+
+ if (color->alpha == 0xffff)
+ {
+ if (op == PIXMAN_OP_OVER)
+ op = PIXMAN_OP_SRC;
+ }
+
+ if (op == PIXMAN_OP_CLEAR)
+ {
+ c.red = 0;
+ c.green = 0;
+ c.blue = 0;
+ c.alpha = 0;
+
+ color = &c;
+
+ op = PIXMAN_OP_SRC;
+ }
+
+ if (op == PIXMAN_OP_SRC)
+ {
+ uint32_t pixel;
+
+ if (color_to_pixel (color, &pixel, dest->bits.format))
+ {
+ pixman_region32_t fill_region;
+ int n_rects, j;
+ pixman_box32_t *rects;
+
+ if (!pixman_region32_init_rects (&fill_region, boxes, n_boxes))
+ return FALSE;
+
+ if (dest->common.have_clip_region)
+ {
+ if (!pixman_region32_intersect (&fill_region,
+ &fill_region,
+ &dest->common.clip_region))
+ return FALSE;
+ }
+
+ rects = pixman_region32_rectangles (&fill_region, &n_rects);
+ for (j = 0; j < n_rects; ++j)
+ {
+ const pixman_box32_t *rect = &(rects[j]);
+ pixman_fill (dest->bits.bits, dest->bits.rowstride, PIXMAN_FORMAT_BPP (dest->bits.format),
+ rect->x1, rect->y1, rect->x2 - rect->x1, rect->y2 - rect->y1,
+ pixel);
+ }
+
+ pixman_region32_fini (&fill_region);
+ return TRUE;
+ }
+ }
+
+ solid = pixman_image_create_solid_fill (color);
+ if (!solid)
+ return FALSE;
+
+ for (i = 0; i < n_boxes; ++i)
+ {
+ const pixman_box32_t *box = &(boxes[i]);
+
+ pixman_image_composite32 (op, solid, NULL, dest,
+ 0, 0, 0, 0,
+ box->x1, box->y1,
+ box->x2 - box->x1, box->y2 - box->y1);
+ }
+
+ pixman_image_unref (solid);
+
+ return TRUE;
+}
+
+/**
+ * pixman_version:
+ *
+ * Returns the version of the pixman library encoded in a single
+ * integer as per %PIXMAN_VERSION_ENCODE. The encoding ensures that
+ * later versions compare greater than earlier versions.
+ *
+ * A run-time comparison to check that pixman's version is greater than
+ * or equal to version X.Y.Z could be performed as follows:
+ *
+ * <informalexample><programlisting>
+ * if (pixman_version() >= PIXMAN_VERSION_ENCODE(X,Y,Z)) {...}
+ * </programlisting></informalexample>
+ *
+ * See also pixman_version_string() as well as the compile-time
+ * equivalents %PIXMAN_VERSION and %PIXMAN_VERSION_STRING.
+ *
+ * Return value: the encoded version.
+ **/
+PIXMAN_EXPORT int
+pixman_version (void)
+{
+ return PIXMAN_VERSION;
+}
+
+/**
+ * pixman_version_string:
+ *
+ * Returns the version of the pixman library as a human-readable string
+ * of the form "X.Y.Z".
+ *
+ * See also pixman_version() as well as the compile-time equivalents
+ * %PIXMAN_VERSION_STRING and %PIXMAN_VERSION.
+ *
+ * Return value: a string containing the version.
+ **/
+PIXMAN_EXPORT const char*
+pixman_version_string (void)
+{
+ return PIXMAN_VERSION_STRING;
+}
+
+/**
+ * pixman_format_supported_source:
+ * @format: A pixman_format_code_t format
+ *
+ * Return value: whether the provided format code is a supported
+ * format for a pixman surface used as a source in
+ * rendering.
+ *
+ * Currently, all pixman_format_code_t values are supported.
+ **/
+PIXMAN_EXPORT pixman_bool_t
+pixman_format_supported_source (pixman_format_code_t format)
+{
+ switch (format)
+ {
+ /* 32 bpp formats */
+ case PIXMAN_a2b10g10r10:
+ case PIXMAN_x2b10g10r10:
+ case PIXMAN_a2r10g10b10:
+ case PIXMAN_x2r10g10b10:
+ case PIXMAN_a8r8g8b8:
+ case PIXMAN_x8r8g8b8:
+ case PIXMAN_a8b8g8r8:
+ case PIXMAN_x8b8g8r8:
+ case PIXMAN_b8g8r8a8:
+ case PIXMAN_b8g8r8x8:
+ case PIXMAN_r8g8b8:
+ case PIXMAN_b8g8r8:
+ case PIXMAN_r5g6b5:
+ case PIXMAN_b5g6r5:
+ case PIXMAN_x14r6g6b6:
+ /* 16 bpp formats */
+ case PIXMAN_a1r5g5b5:
+ case PIXMAN_x1r5g5b5:
+ case PIXMAN_a1b5g5r5:
+ case PIXMAN_x1b5g5r5:
+ case PIXMAN_a4r4g4b4:
+ case PIXMAN_x4r4g4b4:
+ case PIXMAN_a4b4g4r4:
+ case PIXMAN_x4b4g4r4:
+ /* 8bpp formats */
+ case PIXMAN_a8:
+ case PIXMAN_r3g3b2:
+ case PIXMAN_b2g3r3:
+ case PIXMAN_a2r2g2b2:
+ case PIXMAN_a2b2g2r2:
+ case PIXMAN_c8:
+ case PIXMAN_g8:
+ case PIXMAN_x4a4:
+ /* Collides with PIXMAN_c8
+ case PIXMAN_x4c4:
+ */
+ /* Collides with PIXMAN_g8
+ case PIXMAN_x4g4:
+ */
+ /* 4bpp formats */
+ case PIXMAN_a4:
+ case PIXMAN_r1g2b1:
+ case PIXMAN_b1g2r1:
+ case PIXMAN_a1r1g1b1:
+ case PIXMAN_a1b1g1r1:
+ case PIXMAN_c4:
+ case PIXMAN_g4:
+ /* 1bpp formats */
+ case PIXMAN_a1:
+ case PIXMAN_g1:
+ /* YUV formats */
+ case PIXMAN_yuy2:
+ case PIXMAN_yv12:
+ return TRUE;
+
+ default:
+ return FALSE;
+ }
+}
+
+/**
+ * pixman_format_supported_destination:
+ * @format: A pixman_format_code_t format
+ *
+ * Return value: whether the provided format code is a supported
+ * format for a pixman surface used as a destination in
+ * rendering.
+ *
+ * Currently, all pixman_format_code_t values are supported
+ * except for the YUV formats.
+ **/
+PIXMAN_EXPORT pixman_bool_t
+pixman_format_supported_destination (pixman_format_code_t format)
+{
+ /* YUV formats cannot be written to at the moment */
+ if (format == PIXMAN_yuy2 || format == PIXMAN_yv12)
+ return FALSE;
+
+ return pixman_format_supported_source (format);
+}
+
+PIXMAN_EXPORT pixman_bool_t
+pixman_compute_composite_region (pixman_region16_t * region,
+ pixman_image_t * src_image,
+ pixman_image_t * mask_image,
+ pixman_image_t * dst_image,
+ int16_t src_x,
+ int16_t src_y,
+ int16_t mask_x,
+ int16_t mask_y,
+ int16_t dest_x,
+ int16_t dest_y,
+ uint16_t width,
+ uint16_t height)
+{
+ pixman_region32_t r32;
+ pixman_bool_t retval;
+
+ pixman_region32_init (&r32);
+
+ retval = pixman_compute_composite_region32 (
+ &r32, src_image, mask_image, dst_image,
+ src_x, src_y, mask_x, mask_y, dest_x, dest_y,
+ width, height);
+
+ if (retval)
+ {
+ if (!pixman_region16_copy_from_region32 (region, &r32))
+ retval = FALSE;
+ }
+
+ pixman_region32_fini (&r32);
+ return retval;
+}
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