diff options
Diffstat (limited to 'gfx/cairo/libpixman/src/pixman.c')
| -rw-r--r-- | gfx/cairo/libpixman/src/pixman.c | 1135 |
1 files changed, 1135 insertions, 0 deletions
diff --git a/gfx/cairo/libpixman/src/pixman.c b/gfx/cairo/libpixman/src/pixman.c new file mode 100644 index 000000000..184f0c4e6 --- /dev/null +++ b/gfx/cairo/libpixman/src/pixman.c @@ -0,0 +1,1135 @@ +/* -*- 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> + +pixman_implementation_t *global_implementation; + +#ifdef TOOLCHAIN_SUPPORTS_ATTRIBUTE_CONSTRUCTOR +static void __attribute__((constructor)) +pixman_constructor (void) +{ + global_implementation = _pixman_choose_implementation (); +} +#endif + +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; + +#define OPAQUE_SHIFT 13 + + COMPILE_TIME_ASSERT (FAST_PATH_IS_OPAQUE == (1 << OPAQUE_SHIFT)); + + is_dest_opaque = (dst_flags & FAST_PATH_IS_OPAQUE); + is_source_opaque = ((src_flags & mask_flags) & FAST_PATH_IS_OPAQUE); + + is_dest_opaque >>= OPAQUE_SHIFT - 1; + is_source_opaque >>= OPAQUE_SHIFT; + + return operator_table[op].opaque_info[is_dest_opaque | is_source_opaque]; +} + +/* + * 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. + */ +pixman_bool_t +_pixman_compute_composite_region32 (pixman_region32_t * region, + pixman_image_t * src_image, + pixman_image_t * mask_image, + pixman_image_t * dest_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, dest_image->bits.width); + region->extents.y2 = MIN (region->extents.y2, dest_image->bits.height); + + region->data = 0; + + /* Check for empty operation */ + if (region->extents.x1 >= region->extents.x2 || + region->extents.y1 >= region->extents.y2) + { + region->extents.x1 = 0; + region->extents.x2 = 0; + region->extents.y1 = 0; + region->extents.y2 = 0; + return FALSE; + } + + if (dest_image->common.have_clip_region) + { + if (!clip_general_image (region, &dest_image->common.clip_region, 0, 0)) + return FALSE; + } + + if (dest_image->common.alpha_map) + { + if (!pixman_region32_intersect_rect (region, region, + dest_image->common.alpha_origin_x, + dest_image->common.alpha_origin_y, + dest_image->common.alpha_map->width, + dest_image->common.alpha_map->height)) + { + return FALSE; + } + if (!pixman_region32_not_empty (region)) + return FALSE; + if (dest_image->common.alpha_map->common.have_clip_region) + { + if (!clip_general_image (region, &dest_image->common.alpha_map->common.clip_region, + -dest_image->common.alpha_origin_x, + -dest_image->common.alpha_origin_y)) + { + 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)) + 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))) + { + 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)) + 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))) + { + return FALSE; + } + } + } + + return TRUE; +} + +typedef struct +{ + pixman_fixed_48_16_t x1; + pixman_fixed_48_16_t y1; + pixman_fixed_48_16_t x2; + pixman_fixed_48_16_t y2; +} box_48_16_t; + +static pixman_bool_t +compute_transformed_extents (pixman_transform_t *transform, + const pixman_box32_t *extents, + box_48_16_t *transformed) +{ + pixman_fixed_48_16_t tx1, ty1, tx2, ty2; + pixman_fixed_t x1, y1, x2, y2; + int i; + + x1 = pixman_int_to_fixed (extents->x1) + pixman_fixed_1 / 2; + y1 = pixman_int_to_fixed (extents->y1) + pixman_fixed_1 / 2; + x2 = pixman_int_to_fixed (extents->x2) - pixman_fixed_1 / 2; + y2 = pixman_int_to_fixed (extents->y2) - pixman_fixed_1 / 2; + + if (!transform) + { + transformed->x1 = x1; + transformed->y1 = y1; + transformed->x2 = x2; + transformed->y2 = y2; + + return TRUE; + } + + tx1 = ty1 = INT64_MAX; + tx2 = ty2 = INT64_MIN; + + for (i = 0; i < 4; ++i) + { + pixman_fixed_48_16_t tx, ty; + pixman_vector_t v; + + v.vector[0] = (i & 0x01)? x1 : x2; + v.vector[1] = (i & 0x02)? y1 : y2; + v.vector[2] = pixman_fixed_1; + + if (!pixman_transform_point (transform, &v)) + return FALSE; + + tx = (pixman_fixed_48_16_t)v.vector[0]; + ty = (pixman_fixed_48_16_t)v.vector[1]; + + if (tx < tx1) + tx1 = tx; + if (ty < ty1) + ty1 = ty; + if (tx > tx2) + tx2 = tx; + if (ty > ty2) + ty2 = ty; + } + + transformed->x1 = tx1; + transformed->y1 = ty1; + transformed->x2 = tx2; + transformed->y2 = ty2; + + return TRUE; +} + +#define IS_16BIT(x) (((x) >= INT16_MIN) && ((x) <= INT16_MAX)) +#define ABS(f) (((f) < 0)? (-(f)) : (f)) +#define IS_16_16(f) (((f) >= pixman_min_fixed_48_16 && ((f) <= pixman_max_fixed_48_16))) + +static pixman_bool_t +analyze_extent (pixman_image_t *image, + const pixman_box32_t *extents, + uint32_t *flags) +{ + pixman_transform_t *transform; + pixman_fixed_t x_off, y_off; + pixman_fixed_t width, height; + pixman_fixed_t *params; + box_48_16_t transformed; + pixman_box32_t exp_extents; + + if (!image) + return TRUE; + + /* Some compositing functions walk one step + * outside the destination rectangle, so we + * check here that the expanded-by-one source + * extents in destination space fits in 16 bits + */ + if (!IS_16BIT (extents->x1 - 1) || + !IS_16BIT (extents->y1 - 1) || + !IS_16BIT (extents->x2 + 1) || + !IS_16BIT (extents->y2 + 1)) + { + return FALSE; + } + + transform = image->common.transform; + if (image->common.type == BITS) + { + /* During repeat mode calculations we might convert the + * width/height of an image to fixed 16.16, so we need + * them to be smaller than 16 bits. + */ + if (image->bits.width >= 0x7fff || image->bits.height >= 0x7fff) + return FALSE; + + if ((image->common.flags & FAST_PATH_ID_TRANSFORM) == FAST_PATH_ID_TRANSFORM && + extents->x1 >= 0 && + extents->y1 >= 0 && + extents->x2 <= image->bits.width && + extents->y2 <= image->bits.height) + { + *flags |= FAST_PATH_SAMPLES_COVER_CLIP_NEAREST; + return TRUE; + } + + switch (image->common.filter) + { + case PIXMAN_FILTER_CONVOLUTION: + params = image->common.filter_params; + x_off = - pixman_fixed_e - ((params[0] - pixman_fixed_1) >> 1); + y_off = - pixman_fixed_e - ((params[1] - pixman_fixed_1) >> 1); + width = params[0]; + height = params[1]; + break; + + case PIXMAN_FILTER_SEPARABLE_CONVOLUTION: + params = image->common.filter_params; + x_off = - pixman_fixed_e - ((params[0] - pixman_fixed_1) >> 1); + y_off = - pixman_fixed_e - ((params[1] - pixman_fixed_1) >> 1); + width = params[0]; + height = params[1]; + break; + + case PIXMAN_FILTER_GOOD: + case PIXMAN_FILTER_BEST: + case PIXMAN_FILTER_BILINEAR: + x_off = - pixman_fixed_1 / 2; + y_off = - pixman_fixed_1 / 2; + width = pixman_fixed_1; + height = pixman_fixed_1; + break; + + case PIXMAN_FILTER_FAST: + case PIXMAN_FILTER_NEAREST: + x_off = - pixman_fixed_e; + y_off = - pixman_fixed_e; + width = 0; + height = 0; + break; + + default: + return FALSE; + } + } + else + { + x_off = 0; + y_off = 0; + width = 0; + height = 0; + } + + if (!compute_transformed_extents (transform, extents, &transformed)) + return FALSE; + + /* Expand the source area by a tiny bit so account of different rounding that + * may happen during sampling. Note that (8 * pixman_fixed_e) is very far from + * 0.5 so this won't cause the area computed to be overly pessimistic. + */ + transformed.x1 -= 8 * pixman_fixed_e; + transformed.y1 -= 8 * pixman_fixed_e; + transformed.x2 += 8 * pixman_fixed_e; + transformed.y2 += 8 * pixman_fixed_e; + + if (image->common.type == BITS) + { + if (pixman_fixed_to_int (transformed.x1) >= 0 && + pixman_fixed_to_int (transformed.y1) >= 0 && + pixman_fixed_to_int (transformed.x2) < image->bits.width && + pixman_fixed_to_int (transformed.y2) < image->bits.height) + { + *flags |= FAST_PATH_SAMPLES_COVER_CLIP_NEAREST; + } + + if (pixman_fixed_to_int (transformed.x1 - pixman_fixed_1 / 2) >= 0 && + pixman_fixed_to_int (transformed.y1 - pixman_fixed_1 / 2) >= 0 && + pixman_fixed_to_int (transformed.x2 + pixman_fixed_1 / 2) < image->bits.width && + pixman_fixed_to_int (transformed.y2 + pixman_fixed_1 / 2) < image->bits.height) + { + *flags |= FAST_PATH_SAMPLES_COVER_CLIP_BILINEAR; + } + } + + /* Check we don't overflow when the destination extents are expanded by one. + * This ensures that compositing functions can simply walk the source space + * using 16.16 variables without worrying about overflow. + */ + exp_extents = *extents; + exp_extents.x1 -= 1; + exp_extents.y1 -= 1; + exp_extents.x2 += 1; + exp_extents.y2 += 1; + + if (!compute_transformed_extents (transform, &exp_extents, &transformed)) + return FALSE; + + if (!IS_16_16 (transformed.x1 + x_off - 8 * pixman_fixed_e) || + !IS_16_16 (transformed.y1 + y_off - 8 * pixman_fixed_e) || + !IS_16_16 (transformed.x2 + x_off + 8 * pixman_fixed_e + width) || + !IS_16_16 (transformed.y2 + y_off + 8 * pixman_fixed_e + height)) + { + return FALSE; + } + + return TRUE; +} + +/* + * 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_format_code_t src_format, mask_format, dest_format; + pixman_region32_t region; + pixman_box32_t extents; + pixman_implementation_t *imp; + pixman_composite_func_t func; + pixman_composite_info_t info; + const pixman_box32_t *pbox; + int n; + + _pixman_image_validate (src); + if (mask) + _pixman_image_validate (mask); + _pixman_image_validate (dest); + + src_format = src->common.extended_format_code; + info.src_flags = src->common.flags; + + if (mask && !(mask->common.flags & FAST_PATH_IS_OPAQUE)) + { + mask_format = mask->common.extended_format_code; + info.mask_flags = mask->common.flags; + } + else + { + mask_format = PIXMAN_null; + info.mask_flags = FAST_PATH_IS_OPAQUE; + } + + dest_format = dest->common.extended_format_code; + info.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) && + (info.src_flags & info.mask_flags & FAST_PATH_ID_TRANSFORM) && + (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; + } + + 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); + + extents.x1 -= dest_x - src_x; + extents.y1 -= dest_y - src_y; + extents.x2 -= dest_x - src_x; + extents.y2 -= dest_y - src_y; + + if (!analyze_extent (src, &extents, &info.src_flags)) + goto out; + + extents.x1 -= src_x - mask_x; + extents.y1 -= src_y - mask_y; + extents.x2 -= src_x - mask_x; + extents.y2 -= src_y - mask_y; + + if (!analyze_extent (mask, &extents, &info.mask_flags)) + goto out; + + /* If the clip is within the source samples, and the samples are + * opaque, then the source is effectively opaque. + */ +#define NEAREST_OPAQUE (FAST_PATH_SAMPLES_OPAQUE | \ + FAST_PATH_NEAREST_FILTER | \ + FAST_PATH_SAMPLES_COVER_CLIP_NEAREST) +#define BILINEAR_OPAQUE (FAST_PATH_SAMPLES_OPAQUE | \ + FAST_PATH_BILINEAR_FILTER | \ + FAST_PATH_SAMPLES_COVER_CLIP_BILINEAR) + + if ((info.src_flags & NEAREST_OPAQUE) == NEAREST_OPAQUE || + (info.src_flags & BILINEAR_OPAQUE) == BILINEAR_OPAQUE) + { + info.src_flags |= FAST_PATH_IS_OPAQUE; + } + + if ((info.mask_flags & NEAREST_OPAQUE) == NEAREST_OPAQUE || + (info.mask_flags & BILINEAR_OPAQUE) == BILINEAR_OPAQUE) + { + info.mask_flags |= FAST_PATH_IS_OPAQUE; + } + + /* + * 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. + */ + info.op = optimize_operator (op, info.src_flags, info.mask_flags, info.dest_flags); + + _pixman_implementation_lookup_composite ( + get_implementation (), info.op, + src_format, info.src_flags, + mask_format, info.mask_flags, + dest_format, info.dest_flags, + &imp, &func); + + info.src_image = src; + info.mask_image = mask; + info.dest_image = dest; + + pbox = pixman_region32_rectangles (®ion, &n); + + while (n--) + { + info.src_x = pbox->x1 + src_x - dest_x; + info.src_y = pbox->y1 + src_y - dest_y; + info.mask_x = pbox->x1 + mask_x - dest_x; + info.mask_y = pbox->y1 + mask_y - dest_y; + info.dest_x = pbox->x1; + info.dest_y = pbox->y1; + info.width = pbox->x2 - pbox->x1; + info.height = pbox->y2 - pbox->y1; + + func (imp, &info); + + pbox++; + } + +out: + 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); +} + +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 dest_x, + int dest_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, + dest_x, dest_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 filler) +{ + return _pixman_implementation_fill ( + get_implementation(), bits, stride, bpp, x, y, width, height, filler); +} + +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 (const 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_r8g8b8a8 || + format == PIXMAN_r8g8b8x8 || + format == PIXMAN_r5g6b5 || + format == PIXMAN_b5g6r5 || + format == PIXMAN_a8 || + format == PIXMAN_a1)) + { + 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 (PIXMAN_FORMAT_TYPE (format) == PIXMAN_TYPE_RGBA) + c = ((c & 0xff000000) >> 24) | (c << 8); + + if (format == PIXMAN_a1) + c = c >> 31; + else 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, + const 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, + const 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_a8r8g8b8_sRGB: + case PIXMAN_x8r8g8b8: + case PIXMAN_a8b8g8r8: + case PIXMAN_x8b8g8r8: + case PIXMAN_b8g8r8a8: + case PIXMAN_b8g8r8x8: + case PIXMAN_r8g8b8a8: + case PIXMAN_r8g8b8x8: + 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 * dest_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, dest_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; +} |