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-rw-r--r--src/cairo-mask-compositor.c1481
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diff --git a/src/cairo-mask-compositor.c b/src/cairo-mask-compositor.c
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+++ b/src/cairo-mask-compositor.c
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+/* -*- Mode: c; tab-width: 8; c-basic-offset: 4; indent-tabs-mode: t; -*- */
+/* cairo - a vector graphics library with display and print output
+ *
+ * Copyright © 2002 University of Southern California
+ * Copyright © 2005 Red Hat, Inc.
+ * Copyright © 2011 Intel Corporation
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it either under the terms of the GNU Lesser General Public
+ * License version 2.1 as published by the Free Software Foundation
+ * (the "LGPL") or, at your option, under the terms of the Mozilla
+ * Public License Version 1.1 (the "MPL"). If you do not alter this
+ * notice, a recipient may use your version of this file under either
+ * the MPL or the LGPL.
+ *
+ * You should have received a copy of the LGPL along with this library
+ * in the file COPYING-LGPL-2.1; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA
+ * You should have received a copy of the MPL along with this library
+ * in the file COPYING-MPL-1.1
+ *
+ * The contents of this file are subject to the Mozilla Public License
+ * Version 1.1 (the "License"); you may not use this file except in
+ * compliance with the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
+ * OF ANY KIND, either express or implied. See the LGPL or the MPL for
+ * the specific language governing rights and limitations.
+ *
+ * The Original Code is the cairo graphics library.
+ *
+ * The Initial Developer of the Original Code is University of Southern
+ * California.
+ *
+ * Contributor(s):
+ * Carl D. Worth <cworth@cworth.org>
+ * Joonas Pihlaja <jpihlaja@cc.helsinki.fi>
+ * Chris Wilson <chris@chris-wilson.co.uk>
+ */
+
+/* This compositor renders the shape to a mask using an image surface
+ * then calls composite.
+ */
+
+#include "cairoint.h"
+
+#include "cairo-clip-inline.h"
+#include "cairo-compositor-private.h"
+#include "cairo-image-surface-private.h"
+#include "cairo-pattern-inline.h"
+#include "cairo-region-private.h"
+#include "cairo-surface-observer-private.h"
+#include "cairo-surface-offset-private.h"
+#include "cairo-surface-snapshot-private.h"
+#include "cairo-surface-subsurface-private.h"
+
+typedef cairo_int_status_t
+(*draw_func_t) (const cairo_mask_compositor_t *compositor,
+ cairo_surface_t *dst,
+ void *closure,
+ cairo_operator_t op,
+ const cairo_pattern_t *src,
+ const cairo_rectangle_int_t *src_sample,
+ int dst_x,
+ int dst_y,
+ const cairo_rectangle_int_t *extents,
+ cairo_clip_t *clip);
+
+static void do_unaligned_row(void (*blt)(void *closure,
+ int16_t x, int16_t y,
+ int16_t w, int16_t h,
+ uint16_t coverage),
+ void *closure,
+ const cairo_box_t *b,
+ int tx, int y, int h,
+ uint16_t coverage)
+{
+ int x1 = _cairo_fixed_integer_part (b->p1.x) - tx;
+ int x2 = _cairo_fixed_integer_part (b->p2.x) - tx;
+ if (x2 > x1) {
+ if (! _cairo_fixed_is_integer (b->p1.x)) {
+ blt(closure, x1, y, 1, h,
+ coverage * (256 - _cairo_fixed_fractional_part (b->p1.x)));
+ x1++;
+ }
+
+ if (x2 > x1)
+ blt(closure, x1, y, x2-x1, h, (coverage << 8) - (coverage >> 8));
+
+ if (! _cairo_fixed_is_integer (b->p2.x))
+ blt(closure, x2, y, 1, h,
+ coverage * _cairo_fixed_fractional_part (b->p2.x));
+ } else
+ blt(closure, x1, y, 1, h,
+ coverage * (b->p2.x - b->p1.x));
+}
+
+static void do_unaligned_box(void (*blt)(void *closure,
+ int16_t x, int16_t y,
+ int16_t w, int16_t h,
+ uint16_t coverage),
+ void *closure,
+ const cairo_box_t *b, int tx, int ty)
+{
+ int y1 = _cairo_fixed_integer_part (b->p1.y) - ty;
+ int y2 = _cairo_fixed_integer_part (b->p2.y) - ty;
+ if (y2 > y1) {
+ if (! _cairo_fixed_is_integer (b->p1.y)) {
+ do_unaligned_row(blt, closure, b, tx, y1, 1,
+ 256 - _cairo_fixed_fractional_part (b->p1.y));
+ y1++;
+ }
+
+ if (y2 > y1)
+ do_unaligned_row(blt, closure, b, tx, y1, y2-y1, 256);
+
+ if (! _cairo_fixed_is_integer (b->p2.y))
+ do_unaligned_row(blt, closure, b, tx, y2, 1,
+ _cairo_fixed_fractional_part (b->p2.y));
+ } else
+ do_unaligned_row(blt, closure, b, tx, y1, 1,
+ b->p2.y - b->p1.y);
+}
+
+struct blt_in {
+ const cairo_mask_compositor_t *compositor;
+ cairo_surface_t *dst;
+};
+
+static void blt_in(void *closure,
+ int16_t x, int16_t y,
+ int16_t w, int16_t h,
+ uint16_t coverage)
+{
+ struct blt_in *info = closure;
+ cairo_color_t color;
+ cairo_rectangle_int_t rect;
+
+ if (coverage == 0xffff)
+ return;
+
+ rect.x = x;
+ rect.y = y;
+ rect.width = w;
+ rect.height = h;
+
+ _cairo_color_init_rgba (&color, 0, 0, 0, coverage / (double) 0xffff);
+ info->compositor->fill_rectangles (info->dst, CAIRO_OPERATOR_IN,
+ &color, &rect, 1);
+}
+
+static cairo_surface_t *
+create_composite_mask (const cairo_mask_compositor_t *compositor,
+ cairo_surface_t *dst,
+ void *draw_closure,
+ draw_func_t draw_func,
+ draw_func_t mask_func,
+ const cairo_composite_rectangles_t *extents)
+{
+ cairo_surface_t *surface;
+ cairo_int_status_t status;
+ struct blt_in info;
+ int i;
+
+ surface = _cairo_surface_create_scratch (dst, CAIRO_CONTENT_ALPHA,
+ extents->bounded.width,
+ extents->bounded.height,
+ NULL);
+ if (unlikely (surface->status))
+ return surface;
+
+ status = compositor->acquire (surface);
+ if (unlikely (status)) {
+ cairo_surface_destroy (surface);
+ return _cairo_int_surface_create_in_error (status);
+ }
+
+ if (!surface->is_clear) {
+ cairo_rectangle_int_t rect;
+
+ rect.x = rect.y = 0;
+ rect.width = extents->bounded.width;
+ rect.height = extents->bounded.height;
+
+ status = compositor->fill_rectangles (surface, CAIRO_OPERATOR_CLEAR,
+ CAIRO_COLOR_TRANSPARENT,
+ &rect, 1);
+ if (unlikely (status))
+ goto error;
+ }
+
+ if (mask_func) {
+ status = mask_func (compositor, surface, draw_closure,
+ CAIRO_OPERATOR_SOURCE, NULL, NULL,
+ extents->bounded.x, extents->bounded.y,
+ &extents->bounded, extents->clip);
+ if (likely (status != CAIRO_INT_STATUS_UNSUPPORTED))
+ goto out;
+ }
+
+ /* Is it worth setting the clip region here? */
+ status = draw_func (compositor, surface, draw_closure,
+ CAIRO_OPERATOR_ADD, NULL, NULL,
+ extents->bounded.x, extents->bounded.y,
+ &extents->bounded, NULL);
+ if (unlikely (status))
+ goto error;
+
+ info.compositor = compositor;
+ info.dst = surface;
+ for (i = 0; i < extents->clip->num_boxes; i++) {
+ cairo_box_t *b = &extents->clip->boxes[i];
+
+ if (! _cairo_fixed_is_integer (b->p1.x) ||
+ ! _cairo_fixed_is_integer (b->p1.y) ||
+ ! _cairo_fixed_is_integer (b->p2.x) ||
+ ! _cairo_fixed_is_integer (b->p2.y))
+ {
+ do_unaligned_box(blt_in, &info, b,
+ extents->bounded.x,
+ extents->bounded.y);
+ }
+ }
+
+ if (extents->clip->path != NULL) {
+ status = _cairo_clip_combine_with_surface (extents->clip, surface,
+ extents->bounded.x,
+ extents->bounded.y);
+ if (unlikely (status))
+ goto error;
+ }
+
+out:
+ compositor->release (surface);
+ surface->is_clear = FALSE;
+ return surface;
+
+error:
+ compositor->release (surface);
+ if (status != CAIRO_INT_STATUS_NOTHING_TO_DO) {
+ cairo_surface_destroy (surface);
+ surface = _cairo_int_surface_create_in_error (status);
+ }
+ return surface;
+}
+
+/* Handles compositing with a clip surface when the operator allows
+ * us to combine the clip with the mask
+ */
+static cairo_status_t
+clip_and_composite_with_mask (const cairo_mask_compositor_t *compositor,
+ void *draw_closure,
+ draw_func_t draw_func,
+ draw_func_t mask_func,
+ cairo_operator_t op,
+ cairo_pattern_t *pattern,
+ const cairo_composite_rectangles_t*extents)
+{
+ cairo_surface_t *dst = extents->surface;
+ cairo_surface_t *mask, *src;
+ int src_x, src_y;
+
+ mask = create_composite_mask (compositor, dst, draw_closure,
+ draw_func, mask_func,
+ extents);
+ if (unlikely (mask->status))
+ return mask->status;
+
+ if (pattern != NULL || dst->content != CAIRO_CONTENT_ALPHA) {
+ src = compositor->pattern_to_surface (dst,
+ &extents->source_pattern.base,
+ FALSE,
+ &extents->bounded,
+ &extents->source_sample_area,
+ &src_x, &src_y);
+ if (unlikely (src->status)) {
+ cairo_surface_destroy (mask);
+ return src->status;
+ }
+
+ compositor->composite (dst, op, src, mask,
+ extents->bounded.x + src_x,
+ extents->bounded.y + src_y,
+ 0, 0,
+ extents->bounded.x, extents->bounded.y,
+ extents->bounded.width, extents->bounded.height);
+
+ cairo_surface_destroy (src);
+ } else {
+ compositor->composite (dst, op, mask, NULL,
+ 0, 0,
+ 0, 0,
+ extents->bounded.x, extents->bounded.y,
+ extents->bounded.width, extents->bounded.height);
+ }
+ cairo_surface_destroy (mask);
+
+ return CAIRO_STATUS_SUCCESS;
+}
+
+static cairo_surface_t *
+get_clip_source (const cairo_mask_compositor_t *compositor,
+ cairo_clip_t *clip,
+ cairo_surface_t *dst,
+ const cairo_rectangle_int_t *bounds,
+ int *out_x, int *out_y)
+{
+ cairo_surface_pattern_t pattern;
+ cairo_rectangle_int_t r;
+ cairo_surface_t *surface;
+
+ surface = _cairo_clip_get_image (clip, dst, bounds);
+ if (unlikely (surface->status))
+ return surface;
+
+ _cairo_pattern_init_for_surface (&pattern, surface);
+ pattern.base.filter = CAIRO_FILTER_NEAREST;
+ cairo_surface_destroy (surface);
+
+ r.x = r.y = 0;
+ r.width = bounds->width;
+ r.height = bounds->height;
+
+ surface = compositor->pattern_to_surface (dst, &pattern.base, TRUE,
+ &r, &r, out_x, out_y);
+ _cairo_pattern_fini (&pattern.base);
+
+ *out_x += -bounds->x;
+ *out_y += -bounds->y;
+ return surface;
+}
+
+/* Handles compositing with a clip surface when we have to do the operation
+ * in two pieces and combine them together.
+ */
+static cairo_status_t
+clip_and_composite_combine (const cairo_mask_compositor_t *compositor,
+ void *draw_closure,
+ draw_func_t draw_func,
+ cairo_operator_t op,
+ const cairo_pattern_t *pattern,
+ const cairo_composite_rectangles_t*extents)
+{
+ cairo_surface_t *dst = extents->surface;
+ cairo_surface_t *tmp, *clip;
+ cairo_status_t status;
+ int clip_x, clip_y;
+
+ tmp = _cairo_surface_create_scratch (dst, dst->content,
+ extents->bounded.width,
+ extents->bounded.height,
+ NULL);
+ if (unlikely (tmp->status))
+ return tmp->status;
+
+ compositor->composite (tmp, CAIRO_OPERATOR_SOURCE, dst, NULL,
+ extents->bounded.x, extents->bounded.y,
+ 0, 0,
+ 0, 0,
+ extents->bounded.width, extents->bounded.height);
+
+ status = draw_func (compositor, tmp, draw_closure, op,
+ pattern, &extents->source_sample_area,
+ extents->bounded.x, extents->bounded.y,
+ &extents->bounded, NULL);
+ if (unlikely (status))
+ goto cleanup;
+
+ clip = get_clip_source (compositor,
+ extents->clip, dst, &extents->bounded,
+ &clip_x, &clip_y);
+ if (unlikely ((status = clip->status)))
+ goto cleanup;
+
+ if (dst->is_clear) {
+ compositor->composite (dst, CAIRO_OPERATOR_SOURCE, tmp, clip,
+ 0, 0,
+ clip_x, clip_y,
+ extents->bounded.x, extents->bounded.y,
+ extents->bounded.width, extents->bounded.height);
+ } else {
+ /* Punch the clip out of the destination */
+ compositor->composite (dst, CAIRO_OPERATOR_DEST_OUT, clip, NULL,
+ clip_x, clip_y,
+ 0, 0,
+ extents->bounded.x, extents->bounded.y,
+ extents->bounded.width, extents->bounded.height);
+
+ /* Now add the two results together */
+ compositor->composite (dst, CAIRO_OPERATOR_ADD, tmp, clip,
+ 0, 0,
+ clip_x, clip_y,
+ extents->bounded.x, extents->bounded.y,
+ extents->bounded.width, extents->bounded.height);
+ }
+ cairo_surface_destroy (clip);
+
+cleanup:
+ cairo_surface_destroy (tmp);
+ return status;
+}
+
+/* Handles compositing for %CAIRO_OPERATOR_SOURCE, which is special; it's
+ * defined as (src IN mask IN clip) ADD (dst OUT (mask IN clip))
+ */
+static cairo_status_t
+clip_and_composite_source (const cairo_mask_compositor_t *compositor,
+ void *draw_closure,
+ draw_func_t draw_func,
+ draw_func_t mask_func,
+ cairo_pattern_t *pattern,
+ const cairo_composite_rectangles_t *extents)
+{
+ cairo_surface_t *dst = extents->surface;
+ cairo_surface_t *mask, *src;
+ int src_x, src_y;
+
+ /* Create a surface that is mask IN clip */
+ mask = create_composite_mask (compositor, dst, draw_closure,
+ draw_func, mask_func,
+ extents);
+ if (unlikely (mask->status))
+ return mask->status;
+
+ src = compositor->pattern_to_surface (dst,
+ pattern,
+ FALSE,
+ &extents->bounded,
+ &extents->source_sample_area,
+ &src_x, &src_y);
+ if (unlikely (src->status)) {
+ cairo_surface_destroy (mask);
+ return src->status;
+ }
+
+ if (dst->is_clear) {
+ compositor->composite (dst, CAIRO_OPERATOR_SOURCE, src, mask,
+ extents->bounded.x + src_x, extents->bounded.y + src_y,
+ 0, 0,
+ extents->bounded.x, extents->bounded.y,
+ extents->bounded.width, extents->bounded.height);
+ } else {
+ /* Compute dest' = dest OUT (mask IN clip) */
+ compositor->composite (dst, CAIRO_OPERATOR_DEST_OUT, mask, NULL,
+ 0, 0, 0, 0,
+ extents->bounded.x, extents->bounded.y,
+ extents->bounded.width, extents->bounded.height);
+
+ /* Now compute (src IN (mask IN clip)) ADD dest' */
+ compositor->composite (dst, CAIRO_OPERATOR_ADD, src, mask,
+ extents->bounded.x + src_x, extents->bounded.y + src_y,
+ 0, 0,
+ extents->bounded.x, extents->bounded.y,
+ extents->bounded.width, extents->bounded.height);
+ }
+
+ cairo_surface_destroy (src);
+ cairo_surface_destroy (mask);
+
+ return CAIRO_STATUS_SUCCESS;
+}
+
+static cairo_bool_t
+can_reduce_alpha_op (cairo_operator_t op)
+{
+ int iop = op;
+ switch (iop) {
+ case CAIRO_OPERATOR_OVER:
+ case CAIRO_OPERATOR_SOURCE:
+ case CAIRO_OPERATOR_ADD:
+ return TRUE;
+ default:
+ return FALSE;
+ }
+}
+
+static cairo_bool_t
+reduce_alpha_op (cairo_surface_t *dst,
+ cairo_operator_t op,
+ const cairo_pattern_t *pattern)
+{
+ return dst->is_clear &&
+ dst->content == CAIRO_CONTENT_ALPHA &&
+ _cairo_pattern_is_opaque_solid (pattern) &&
+ can_reduce_alpha_op (op);
+}
+
+static cairo_status_t
+fixup_unbounded (const cairo_mask_compositor_t *compositor,
+ cairo_surface_t *dst,
+ const cairo_composite_rectangles_t *extents)
+{
+ cairo_rectangle_int_t rects[4];
+ int n;
+
+ if (extents->bounded.width == extents->unbounded.width &&
+ extents->bounded.height == extents->unbounded.height)
+ {
+ return CAIRO_STATUS_SUCCESS;
+ }
+
+ n = 0;
+ if (extents->bounded.width == 0 || extents->bounded.height == 0) {
+ rects[n].x = extents->unbounded.x;
+ rects[n].width = extents->unbounded.width;
+ rects[n].y = extents->unbounded.y;
+ rects[n].height = extents->unbounded.height;
+ n++;
+ } else {
+ /* top */
+ if (extents->bounded.y != extents->unbounded.y) {
+ rects[n].x = extents->unbounded.x;
+ rects[n].width = extents->unbounded.width;
+ rects[n].y = extents->unbounded.y;
+ rects[n].height = extents->bounded.y - extents->unbounded.y;
+ n++;
+ }
+ /* left */
+ if (extents->bounded.x != extents->unbounded.x) {
+ rects[n].x = extents->unbounded.x;
+ rects[n].width = extents->bounded.x - extents->unbounded.x;
+ rects[n].y = extents->bounded.y;
+ rects[n].height = extents->bounded.height;
+ n++;
+ }
+ /* right */
+ if (extents->bounded.x + extents->bounded.width != extents->unbounded.x + extents->unbounded.width) {
+ rects[n].x = extents->bounded.x + extents->bounded.width;
+ rects[n].width = extents->unbounded.x + extents->unbounded.width - rects[n].x;
+ rects[n].y = extents->bounded.y;
+ rects[n].height = extents->bounded.height;
+ n++;
+ }
+ /* bottom */
+ if (extents->bounded.y + extents->bounded.height != extents->unbounded.y + extents->unbounded.height) {
+ rects[n].x = extents->unbounded.x;
+ rects[n].width = extents->unbounded.width;
+ rects[n].y = extents->bounded.y + extents->bounded.height;
+ rects[n].height = extents->unbounded.y + extents->unbounded.height - rects[n].y;
+ n++;
+ }
+ }
+
+ return compositor->fill_rectangles (dst, CAIRO_OPERATOR_CLEAR,
+ CAIRO_COLOR_TRANSPARENT,
+ rects, n);
+}
+
+static cairo_status_t
+fixup_unbounded_with_mask (const cairo_mask_compositor_t *compositor,
+ cairo_surface_t *dst,
+ const cairo_composite_rectangles_t *extents)
+{
+ cairo_surface_t *mask;
+ int mask_x, mask_y;
+
+ mask = get_clip_source (compositor,
+ extents->clip, dst, &extents->unbounded,
+ &mask_x, &mask_y);
+ if (unlikely (mask->status))
+ return mask->status;
+
+ /* top */
+ if (extents->bounded.y != extents->unbounded.y) {
+ int x = extents->unbounded.x;
+ int y = extents->unbounded.y;
+ int width = extents->unbounded.width;
+ int height = extents->bounded.y - y;
+
+ compositor->composite (dst, CAIRO_OPERATOR_DEST_OUT, mask, NULL,
+ x + mask_x, y + mask_y,
+ 0, 0,
+ x, y,
+ width, height);
+ }
+
+ /* left */
+ if (extents->bounded.x != extents->unbounded.x) {
+ int x = extents->unbounded.x;
+ int y = extents->bounded.y;
+ int width = extents->bounded.x - x;
+ int height = extents->bounded.height;
+
+ compositor->composite (dst, CAIRO_OPERATOR_DEST_OUT, mask, NULL,
+ x + mask_x, y + mask_y,
+ 0, 0,
+ x, y,
+ width, height);
+ }
+
+ /* right */
+ if (extents->bounded.x + extents->bounded.width != extents->unbounded.x + extents->unbounded.width) {
+ int x = extents->bounded.x + extents->bounded.width;
+ int y = extents->bounded.y;
+ int width = extents->unbounded.x + extents->unbounded.width - x;
+ int height = extents->bounded.height;
+
+ compositor->composite (dst, CAIRO_OPERATOR_DEST_OUT, mask, NULL,
+ x + mask_x, y + mask_y,
+ 0, 0,
+ x, y,
+ width, height);
+ }
+
+ /* bottom */
+ if (extents->bounded.y + extents->bounded.height != extents->unbounded.y + extents->unbounded.height) {
+ int x = extents->unbounded.x;
+ int y = extents->bounded.y + extents->bounded.height;
+ int width = extents->unbounded.width;
+ int height = extents->unbounded.y + extents->unbounded.height - y;
+
+ compositor->composite (dst, CAIRO_OPERATOR_DEST_OUT, mask, NULL,
+ x + mask_x, y + mask_y,
+ 0, 0,
+ x, y,
+ width, height);
+ }
+
+ cairo_surface_destroy (mask);
+
+ return CAIRO_STATUS_SUCCESS;
+}
+
+static cairo_status_t
+fixup_unbounded_boxes (const cairo_mask_compositor_t *compositor,
+ const cairo_composite_rectangles_t *extents,
+ cairo_boxes_t *boxes)
+{
+ cairo_surface_t *dst = extents->surface;
+ cairo_boxes_t clear;
+ cairo_region_t *clip_region;
+ cairo_box_t box;
+ cairo_status_t status;
+ struct _cairo_boxes_chunk *chunk;
+ int i;
+
+ assert (boxes->is_pixel_aligned);
+
+ clip_region = NULL;
+ if (_cairo_clip_is_region (extents->clip) &&
+ (clip_region = _cairo_clip_get_region (extents->clip)) &&
+ cairo_region_contains_rectangle (clip_region,
+ &extents->bounded) == CAIRO_REGION_OVERLAP_IN)
+ clip_region = NULL;
+
+
+ if (boxes->num_boxes <= 1 && clip_region == NULL)
+ return fixup_unbounded (compositor, dst, extents);
+
+ _cairo_boxes_init (&clear);
+
+ box.p1.x = _cairo_fixed_from_int (extents->unbounded.x + extents->unbounded.width);
+ box.p1.y = _cairo_fixed_from_int (extents->unbounded.y);
+ box.p2.x = _cairo_fixed_from_int (extents->unbounded.x);
+ box.p2.y = _cairo_fixed_from_int (extents->unbounded.y + extents->unbounded.height);
+
+ if (clip_region == NULL) {
+ cairo_boxes_t tmp;
+
+ _cairo_boxes_init (&tmp);
+
+ status = _cairo_boxes_add (&tmp, CAIRO_ANTIALIAS_DEFAULT, &box);
+ assert (status == CAIRO_STATUS_SUCCESS);
+
+ tmp.chunks.next = &boxes->chunks;
+ tmp.num_boxes += boxes->num_boxes;
+
+ status = _cairo_bentley_ottmann_tessellate_boxes (&tmp,
+ CAIRO_FILL_RULE_WINDING,
+ &clear);
+
+ tmp.chunks.next = NULL;
+ } else {
+ pixman_box32_t *pbox;
+
+ pbox = pixman_region32_rectangles (&clip_region->rgn, &i);
+ _cairo_boxes_limit (&clear, (cairo_box_t *) pbox, i);
+
+ status = _cairo_boxes_add (&clear, CAIRO_ANTIALIAS_DEFAULT, &box);
+ assert (status == CAIRO_STATUS_SUCCESS);
+
+ for (chunk = &boxes->chunks; chunk != NULL; chunk = chunk->next) {
+ for (i = 0; i < chunk->count; i++) {
+ status = _cairo_boxes_add (&clear,
+ CAIRO_ANTIALIAS_DEFAULT,
+ &chunk->base[i]);
+ if (unlikely (status)) {
+ _cairo_boxes_fini (&clear);
+ return status;
+ }
+ }
+ }
+
+ status = _cairo_bentley_ottmann_tessellate_boxes (&clear,
+ CAIRO_FILL_RULE_WINDING,
+ &clear);
+ }
+
+ if (likely (status == CAIRO_STATUS_SUCCESS)) {
+ status = compositor->fill_boxes (dst,
+ CAIRO_OPERATOR_CLEAR,
+ CAIRO_COLOR_TRANSPARENT,
+ &clear);
+ }
+
+ _cairo_boxes_fini (&clear);
+
+ return status;
+}
+
+enum {
+ NEED_CLIP_REGION = 0x1,
+ NEED_CLIP_SURFACE = 0x2,
+ FORCE_CLIP_REGION = 0x4,
+};
+
+static cairo_bool_t
+need_bounded_clip (cairo_composite_rectangles_t *extents)
+{
+ unsigned int flags = NEED_CLIP_REGION;
+ if (! _cairo_clip_is_region (extents->clip))
+ flags |= NEED_CLIP_SURFACE;
+ return flags;
+}
+
+static cairo_bool_t
+need_unbounded_clip (cairo_composite_rectangles_t *extents)
+{
+ unsigned int flags = 0;
+ if (! extents->is_bounded) {
+ flags |= NEED_CLIP_REGION;
+ if (! _cairo_clip_is_region (extents->clip))
+ flags |= NEED_CLIP_SURFACE;
+ }
+ if (extents->clip->path != NULL)
+ flags |= NEED_CLIP_SURFACE;
+ return flags;
+}
+
+static cairo_status_t
+clip_and_composite (const cairo_mask_compositor_t *compositor,
+ draw_func_t draw_func,
+ draw_func_t mask_func,
+ void *draw_closure,
+ cairo_composite_rectangles_t*extents,
+ unsigned int need_clip)
+{
+ cairo_surface_t *dst = extents->surface;
+ cairo_operator_t op = extents->op;
+ cairo_pattern_t *src = &extents->source_pattern.base;
+ cairo_region_t *clip_region = NULL;
+ cairo_status_t status;
+
+ compositor->acquire (dst);
+
+ if (need_clip & NEED_CLIP_REGION) {
+ clip_region = _cairo_clip_get_region (extents->clip);
+ if ((need_clip & FORCE_CLIP_REGION) == 0 &&
+ _cairo_composite_rectangles_can_reduce_clip (extents,
+ extents->clip))
+ clip_region = NULL;
+ if (clip_region != NULL) {
+ status = compositor->set_clip_region (dst, clip_region);
+ if (unlikely (status)) {
+ compositor->release (dst);
+ return status;
+ }
+ }
+ }
+
+ if (reduce_alpha_op (dst, op, &extents->source_pattern.base)) {
+ op = CAIRO_OPERATOR_ADD;
+ src = NULL;
+ }
+
+ if (op == CAIRO_OPERATOR_SOURCE) {
+ status = clip_and_composite_source (compositor,
+ draw_closure, draw_func, mask_func,
+ src, extents);
+ } else {
+ if (op == CAIRO_OPERATOR_CLEAR) {
+ op = CAIRO_OPERATOR_DEST_OUT;
+ src = NULL;
+ }
+
+ if (need_clip & NEED_CLIP_SURFACE) {
+ if (extents->is_bounded) {
+ status = clip_and_composite_with_mask (compositor,
+ draw_closure,
+ draw_func,
+ mask_func,
+ op, src, extents);
+ } else {
+ status = clip_and_composite_combine (compositor,
+ draw_closure,
+ draw_func,
+ op, src, extents);
+ }
+ } else {
+ status = draw_func (compositor,
+ dst, draw_closure,
+ op, src, &extents->source_sample_area,
+ 0, 0,
+ &extents->bounded,
+ extents->clip);
+ }
+ }
+
+ if (status == CAIRO_STATUS_SUCCESS && ! extents->is_bounded) {
+ if (need_clip & NEED_CLIP_SURFACE)
+ status = fixup_unbounded_with_mask (compositor, dst, extents);
+ else
+ status = fixup_unbounded (compositor, dst, extents);
+ }
+
+ if (clip_region)
+ compositor->set_clip_region (dst, NULL);
+
+ compositor->release (dst);
+
+ return status;
+}
+
+static cairo_int_status_t
+trim_extents_to_boxes (cairo_composite_rectangles_t *extents,
+ cairo_boxes_t *boxes)
+{
+ cairo_box_t box;
+
+ _cairo_boxes_extents (boxes, &box);
+ return _cairo_composite_rectangles_intersect_mask_extents (extents, &box);
+}
+
+static cairo_status_t
+upload_boxes (const cairo_mask_compositor_t *compositor,
+ cairo_composite_rectangles_t *extents,
+ cairo_boxes_t *boxes)
+{
+ cairo_surface_t *dst = extents->surface;
+ const cairo_pattern_t *source = &extents->source_pattern.base;
+ cairo_surface_t *src;
+ cairo_rectangle_int_t limit;
+ cairo_int_status_t status;
+ int tx, ty;
+
+ src = _cairo_pattern_get_source ((cairo_surface_pattern_t *)source, &limit);
+ if (!(src->type == CAIRO_SURFACE_TYPE_IMAGE || src->type == dst->type))
+ return CAIRO_INT_STATUS_UNSUPPORTED;
+
+ if (! _cairo_matrix_is_integer_translation (&source->matrix, &tx, &ty))
+ return CAIRO_INT_STATUS_UNSUPPORTED;
+
+ /* Check that the data is entirely within the image */
+ if (extents->bounded.x + tx < limit.x || extents->bounded.y + ty < limit.y)
+ return CAIRO_INT_STATUS_UNSUPPORTED;
+
+ if (extents->bounded.x + extents->bounded.width + tx > limit.x + limit.width ||
+ extents->bounded.y + extents->bounded.height + ty > limit.y + limit.height)
+ return CAIRO_INT_STATUS_UNSUPPORTED;
+
+ tx += limit.x;
+ ty += limit.y;
+
+ if (src->type == CAIRO_SURFACE_TYPE_IMAGE)
+ status = compositor->draw_image_boxes (dst,
+ (cairo_image_surface_t *)src,
+ boxes, tx, ty);
+ else
+ status = compositor->copy_boxes (dst, src, boxes, &extents->bounded,
+ tx, ty);
+
+ return status;
+}
+
+static cairo_status_t
+composite_boxes (const cairo_mask_compositor_t *compositor,
+ const cairo_composite_rectangles_t *extents,
+ cairo_boxes_t *boxes)
+{
+ cairo_surface_t *dst = extents->surface;
+ cairo_operator_t op = extents->op;
+ const cairo_pattern_t *source = &extents->source_pattern.base;
+ cairo_bool_t need_clip_mask = extents->clip->path != NULL;
+ cairo_status_t status;
+
+ if (need_clip_mask &&
+ (! extents->is_bounded || op == CAIRO_OPERATOR_SOURCE))
+ {
+ return CAIRO_INT_STATUS_UNSUPPORTED;
+ }
+
+ status = compositor->acquire (dst);
+ if (unlikely (status))
+ return status;
+
+ if (! need_clip_mask && source->type == CAIRO_PATTERN_TYPE_SOLID) {
+ const cairo_color_t *color;
+
+ color = &((cairo_solid_pattern_t *) source)->color;
+ status = compositor->fill_boxes (dst, op, color, boxes);
+ } else {
+ cairo_surface_t *src, *mask = NULL;
+ int src_x, src_y;
+ int mask_x = 0, mask_y = 0;
+
+ if (need_clip_mask) {
+ mask = get_clip_source (compositor,
+ extents->clip, dst, &extents->bounded,
+ &mask_x, &mask_y);
+ if (unlikely (mask->status))
+ return mask->status;
+
+ if (op == CAIRO_OPERATOR_CLEAR) {
+ source = NULL;
+ op = CAIRO_OPERATOR_DEST_OUT;
+ }
+ }
+
+ if (source || mask == NULL) {
+ src = compositor->pattern_to_surface (dst, source, FALSE,
+ &extents->bounded,
+ &extents->source_sample_area,
+ &src_x, &src_y);
+ } else {
+ src = mask;
+ src_x = mask_x;
+ src_y = mask_y;
+ mask = NULL;
+ }
+
+ status = compositor->composite_boxes (dst, op, src, mask,
+ src_x, src_y,
+ mask_x, mask_y,
+ 0, 0,
+ boxes, &extents->bounded);
+
+ cairo_surface_destroy (src);
+ cairo_surface_destroy (mask);
+ }
+
+ if (status == CAIRO_STATUS_SUCCESS && ! extents->is_bounded)
+ status = fixup_unbounded_boxes (compositor, extents, boxes);
+
+ compositor->release (dst);
+
+ return status;
+}
+
+static cairo_status_t
+clip_and_composite_boxes (const cairo_mask_compositor_t *compositor,
+ cairo_composite_rectangles_t *extents,
+ cairo_boxes_t *boxes)
+{
+ cairo_surface_t *dst = extents->surface;
+ cairo_int_status_t status;
+
+ if (boxes->num_boxes == 0) {
+ if (extents->is_bounded)
+ return CAIRO_STATUS_SUCCESS;
+
+ return fixup_unbounded_boxes (compositor, extents, boxes);
+ }
+
+ if (! boxes->is_pixel_aligned)
+ return CAIRO_INT_STATUS_UNSUPPORTED;
+
+ status = trim_extents_to_boxes (extents, boxes);
+ if (unlikely (status))
+ return status;
+
+ if (extents->source_pattern.base.type == CAIRO_PATTERN_TYPE_SURFACE &&
+ extents->clip->path == NULL &&
+ (extents->op == CAIRO_OPERATOR_SOURCE ||
+ (dst->is_clear && (extents->op == CAIRO_OPERATOR_OVER ||
+ extents->op == CAIRO_OPERATOR_ADD))))
+ {
+ status = upload_boxes (compositor, extents, boxes);
+ if (status != CAIRO_INT_STATUS_UNSUPPORTED)
+ return status;
+ }
+
+ return composite_boxes (compositor, extents, boxes);
+}
+
+/* high-level compositor interface */
+
+static cairo_int_status_t
+_cairo_mask_compositor_paint (const cairo_compositor_t *_compositor,
+ cairo_composite_rectangles_t *extents)
+{
+ cairo_mask_compositor_t *compositor = (cairo_mask_compositor_t*)_compositor;
+ cairo_boxes_t boxes;
+ cairo_int_status_t status;
+
+ status = compositor->check_composite (extents);
+ if (unlikely (status))
+ return status;
+
+ _cairo_clip_steal_boxes (extents->clip, &boxes);
+ status = clip_and_composite_boxes (compositor, extents, &boxes);
+ _cairo_clip_unsteal_boxes (extents->clip, &boxes);
+
+ return status;
+}
+
+struct composite_opacity_info {
+ const cairo_mask_compositor_t *compositor;
+ uint8_t op;
+ cairo_surface_t *dst;
+ cairo_surface_t *src;
+ int src_x, src_y;
+ double opacity;
+};
+
+static void composite_opacity(void *closure,
+ int16_t x, int16_t y,
+ int16_t w, int16_t h,
+ uint16_t coverage)
+{
+ struct composite_opacity_info *info = closure;
+ const cairo_mask_compositor_t *compositor = info->compositor;
+ cairo_surface_t *mask;
+ int mask_x, mask_y;
+ cairo_color_t color;
+ cairo_solid_pattern_t solid;
+
+ _cairo_color_init_rgba (&color, 0, 0, 0, info->opacity * coverage);
+ _cairo_pattern_init_solid (&solid, &color);
+ mask = compositor->pattern_to_surface (info->dst, &solid.base, TRUE,
+ &_cairo_unbounded_rectangle,
+ &_cairo_unbounded_rectangle,
+ &mask_x, &mask_y);
+ if (likely (mask->status == CAIRO_STATUS_SUCCESS)) {
+ if (info->src) {
+ compositor->composite (info->dst, info->op, info->src, mask,
+ x + info->src_x, y + info->src_y,
+ mask_x, mask_y,
+ x, y,
+ w, h);
+ } else {
+ compositor->composite (info->dst, info->op, mask, NULL,
+ mask_x, mask_y,
+ 0, 0,
+ x, y,
+ w, h);
+ }
+ }
+
+ cairo_surface_destroy (mask);
+}
+
+static cairo_int_status_t
+composite_opacity_boxes (const cairo_mask_compositor_t *compositor,
+ cairo_surface_t *dst,
+ void *closure,
+ cairo_operator_t op,
+ const cairo_pattern_t *src_pattern,
+ const cairo_rectangle_int_t *src_sample,
+ int dst_x,
+ int dst_y,
+ const cairo_rectangle_int_t *extents,
+ cairo_clip_t *clip)
+{
+ const cairo_solid_pattern_t *mask_pattern = closure;
+ struct composite_opacity_info info;
+ int i;
+
+ assert (clip);
+
+ info.compositor = compositor;
+ info.op = op;
+ info.dst = dst;
+
+ if (src_pattern != NULL) {
+ info.src = compositor->pattern_to_surface (dst, src_pattern, FALSE,
+ extents, src_sample,
+ &info.src_x, &info.src_y);
+ if (unlikely (info.src->status))
+ return info.src->status;
+ } else
+ info.src = NULL;
+
+ info.opacity = mask_pattern->color.alpha / (double) 0xffff;
+
+ /* XXX for lots of boxes create a clip region for the fully opaque areas */
+ for (i = 0; i < clip->num_boxes; i++)
+ do_unaligned_box(composite_opacity, &info,
+ &clip->boxes[i], dst_x, dst_y);
+ cairo_surface_destroy (info.src);
+
+ return CAIRO_STATUS_SUCCESS;
+}
+
+struct composite_box_info {
+ const cairo_mask_compositor_t *compositor;
+ cairo_surface_t *dst;
+ cairo_surface_t *src;
+ int src_x, src_y;
+ uint8_t op;
+};
+
+static void composite_box(void *closure,
+ int16_t x, int16_t y,
+ int16_t w, int16_t h,
+ uint16_t coverage)
+{
+ struct composite_box_info *info = closure;
+ const cairo_mask_compositor_t *compositor = info->compositor;
+
+ if (! CAIRO_ALPHA_SHORT_IS_OPAQUE (coverage)) {
+ cairo_surface_t *mask;
+ cairo_color_t color;
+ cairo_solid_pattern_t solid;
+ int mask_x, mask_y;
+
+ _cairo_color_init_rgba (&color, 0, 0, 0, coverage / (double)0xffff);
+ _cairo_pattern_init_solid (&solid, &color);
+
+ mask = compositor->pattern_to_surface (info->dst, &solid.base, FALSE,
+ &_cairo_unbounded_rectangle,
+ &_cairo_unbounded_rectangle,
+ &mask_x, &mask_y);
+
+ if (likely (mask->status == CAIRO_STATUS_SUCCESS)) {
+ compositor->composite (info->dst, info->op, info->src, mask,
+ x + info->src_x, y + info->src_y,
+ mask_x, mask_y,
+ x, y,
+ w, h);
+ }
+
+ cairo_surface_destroy (mask);
+ } else {
+ compositor->composite (info->dst, info->op, info->src, NULL,
+ x + info->src_x, y + info->src_y,
+ 0, 0,
+ x, y,
+ w, h);
+ }
+}
+
+static cairo_int_status_t
+composite_mask_clip_boxes (const cairo_mask_compositor_t *compositor,
+ cairo_surface_t *dst,
+ void *closure,
+ cairo_operator_t op,
+ const cairo_pattern_t *src_pattern,
+ const cairo_rectangle_int_t *src_sample,
+ int dst_x,
+ int dst_y,
+ const cairo_rectangle_int_t *extents,
+ cairo_clip_t *clip)
+{
+ cairo_composite_rectangles_t *composite = closure;
+ struct composite_box_info info;
+ int i;
+
+ assert (src_pattern == NULL);
+ assert (op == CAIRO_OPERATOR_SOURCE);
+
+ info.compositor = compositor;
+ info.op = CAIRO_OPERATOR_SOURCE;
+ info.dst = dst;
+ info.src = compositor->pattern_to_surface (dst,
+ &composite->mask_pattern.base,
+ FALSE, extents,
+ &composite->mask_sample_area,
+ &info.src_x, &info.src_y);
+ if (unlikely (info.src->status))
+ return info.src->status;
+
+ info.src_x += dst_x;
+ info.src_y += dst_y;
+
+ for (i = 0; i < clip->num_boxes; i++)
+ do_unaligned_box(composite_box, &info, &clip->boxes[i], dst_x, dst_y);
+
+ cairo_surface_destroy (info.src);
+
+ return CAIRO_STATUS_SUCCESS;
+}
+
+static cairo_int_status_t
+composite_mask (const cairo_mask_compositor_t *compositor,
+ cairo_surface_t *dst,
+ void *closure,
+ cairo_operator_t op,
+ const cairo_pattern_t *src_pattern,
+ const cairo_rectangle_int_t *src_sample,
+ int dst_x,
+ int dst_y,
+ const cairo_rectangle_int_t *extents,
+ cairo_clip_t *clip)
+{
+ cairo_composite_rectangles_t *composite = closure;
+ cairo_surface_t *src, *mask;
+ int src_x, src_y;
+ int mask_x, mask_y;
+
+ if (src_pattern != NULL) {
+ src = compositor->pattern_to_surface (dst, src_pattern, FALSE,
+ extents, src_sample,
+ &src_x, &src_y);
+ if (unlikely (src->status))
+ return src->status;
+
+ mask = compositor->pattern_to_surface (dst, &composite->mask_pattern.base, TRUE,
+ extents, &composite->mask_sample_area,
+ &mask_x, &mask_y);
+ if (unlikely (mask->status)) {
+ cairo_surface_destroy (src);
+ return mask->status;
+ }
+
+ compositor->composite (dst, op, src, mask,
+ extents->x + src_x, extents->y + src_y,
+ extents->x + mask_x, extents->y + mask_y,
+ extents->x - dst_x, extents->y - dst_y,
+ extents->width, extents->height);
+
+ cairo_surface_destroy (mask);
+ cairo_surface_destroy (src);
+ } else {
+ src = compositor->pattern_to_surface (dst, &composite->mask_pattern.base, FALSE,
+ extents, &composite->mask_sample_area,
+ &src_x, &src_y);
+ if (unlikely (src->status))
+ return src->status;
+
+ compositor->composite (dst, op, src, NULL,
+ extents->x + src_x, extents->y + src_y,
+ 0, 0,
+ extents->x - dst_x, extents->y - dst_y,
+ extents->width, extents->height);
+
+ cairo_surface_destroy (src);
+ }
+
+ return CAIRO_STATUS_SUCCESS;
+}
+
+static cairo_int_status_t
+_cairo_mask_compositor_mask (const cairo_compositor_t *_compositor,
+ cairo_composite_rectangles_t *extents)
+{
+ const cairo_mask_compositor_t *compositor = (cairo_mask_compositor_t*)_compositor;
+ cairo_int_status_t status = CAIRO_INT_STATUS_UNSUPPORTED;
+
+ status = compositor->check_composite (extents);
+ if (unlikely (status))
+ return status;
+
+ if (extents->mask_pattern.base.type == CAIRO_PATTERN_TYPE_SOLID &&
+ extents->clip->path == NULL &&
+ _cairo_clip_is_region (extents->clip)) {
+ status = clip_and_composite (compositor,
+ composite_opacity_boxes,
+ composite_opacity_boxes,
+ &extents->mask_pattern.solid,
+ extents, need_unbounded_clip (extents));
+ } else {
+ status = clip_and_composite (compositor,
+ composite_mask,
+ extents->clip->path == NULL ? composite_mask_clip_boxes : NULL,
+ extents,
+ extents, need_bounded_clip (extents));
+ }
+
+ return status;
+}
+
+static cairo_int_status_t
+_cairo_mask_compositor_stroke (const cairo_compositor_t *_compositor,
+ cairo_composite_rectangles_t *extents,
+ const cairo_path_fixed_t *path,
+ const cairo_stroke_style_t *style,
+ const cairo_matrix_t *ctm,
+ const cairo_matrix_t *ctm_inverse,
+ double tolerance,
+ cairo_antialias_t antialias)
+{
+ const cairo_mask_compositor_t *compositor = (cairo_mask_compositor_t*)_compositor;
+ cairo_surface_t *mask;
+ cairo_surface_pattern_t pattern;
+ cairo_int_status_t status = CAIRO_INT_STATUS_UNSUPPORTED;
+
+ status = compositor->check_composite (extents);
+ if (unlikely (status))
+ return status;
+
+ if (_cairo_path_fixed_stroke_is_rectilinear (path)) {
+ cairo_boxes_t boxes;
+
+ _cairo_boxes_init_with_clip (&boxes, extents->clip);
+ status = _cairo_path_fixed_stroke_rectilinear_to_boxes (path,
+ style,
+ ctm,
+ antialias,
+ &boxes);
+ if (likely (status == CAIRO_INT_STATUS_SUCCESS))
+ status = clip_and_composite_boxes (compositor, extents, &boxes);
+ _cairo_boxes_fini (&boxes);
+ }
+
+
+ if (status == CAIRO_INT_STATUS_UNSUPPORTED) {
+ mask = cairo_surface_create_similar_image (extents->surface,
+ CAIRO_FORMAT_A8,
+ extents->bounded.width,
+ extents->bounded.height);
+ if (unlikely (mask->status))
+ return mask->status;
+
+ status = _cairo_surface_offset_stroke (mask,
+ extents->bounded.x,
+ extents->bounded.y,
+ CAIRO_OPERATOR_ADD,
+ &_cairo_pattern_white.base,
+ path, style, ctm, ctm_inverse,
+ tolerance, antialias,
+ extents->clip);
+ if (unlikely (status)) {
+ cairo_surface_destroy (mask);
+ return status;
+ }
+
+ _cairo_pattern_init_for_surface (&pattern, mask);
+ cairo_surface_destroy (mask);
+
+ cairo_matrix_init_translate (&pattern.base.matrix,
+ -extents->bounded.x,
+ -extents->bounded.y);
+ pattern.base.filter = CAIRO_FILTER_NEAREST;
+ pattern.base.extend = CAIRO_EXTEND_NONE;
+ status = _cairo_surface_mask (extents->surface,
+ extents->op,
+ &extents->source_pattern.base,
+ &pattern.base,
+ extents->clip);
+ _cairo_pattern_fini (&pattern.base);
+ }
+
+ return status;
+}
+
+static cairo_int_status_t
+_cairo_mask_compositor_fill (const cairo_compositor_t *_compositor,
+ cairo_composite_rectangles_t *extents,
+ const cairo_path_fixed_t *path,
+ cairo_fill_rule_t fill_rule,
+ double tolerance,
+ cairo_antialias_t antialias)
+{
+ const cairo_mask_compositor_t *compositor = (cairo_mask_compositor_t*)_compositor;
+ cairo_surface_t *mask;
+ cairo_surface_pattern_t pattern;
+ cairo_int_status_t status = CAIRO_INT_STATUS_UNSUPPORTED;
+
+ status = compositor->check_composite (extents);
+ if (unlikely (status))
+ return status;
+
+ if (_cairo_path_fixed_fill_is_rectilinear (path)) {
+ cairo_boxes_t boxes;
+
+ _cairo_boxes_init_with_clip (&boxes, extents->clip);
+ status = _cairo_path_fixed_fill_rectilinear_to_boxes (path,
+ fill_rule,
+ antialias,
+ &boxes);
+ if (likely (status == CAIRO_INT_STATUS_SUCCESS))
+ status = clip_and_composite_boxes (compositor, extents, &boxes);
+ _cairo_boxes_fini (&boxes);
+ }
+
+ if (status == CAIRO_INT_STATUS_UNSUPPORTED) {
+ mask = cairo_surface_create_similar_image (extents->surface,
+ CAIRO_FORMAT_A8,
+ extents->bounded.width,
+ extents->bounded.height);
+ if (unlikely (mask->status))
+ return mask->status;
+
+ status = _cairo_surface_offset_fill (mask,
+ extents->bounded.x,
+ extents->bounded.y,
+ CAIRO_OPERATOR_ADD,
+ &_cairo_pattern_white.base,
+ path, fill_rule, tolerance, antialias,
+ extents->clip);
+ if (unlikely (status)) {
+ cairo_surface_destroy (mask);
+ return status;
+ }
+
+ _cairo_pattern_init_for_surface (&pattern, mask);
+ cairo_surface_destroy (mask);
+
+ cairo_matrix_init_translate (&pattern.base.matrix,
+ -extents->bounded.x,
+ -extents->bounded.y);
+ pattern.base.filter = CAIRO_FILTER_NEAREST;
+ pattern.base.extend = CAIRO_EXTEND_NONE;
+ status = _cairo_surface_mask (extents->surface,
+ extents->op,
+ &extents->source_pattern.base,
+ &pattern.base,
+ extents->clip);
+ _cairo_pattern_fini (&pattern.base);
+ }
+
+ return status;
+}
+
+static cairo_int_status_t
+_cairo_mask_compositor_glyphs (const cairo_compositor_t *_compositor,
+ cairo_composite_rectangles_t *extents,
+ cairo_scaled_font_t *scaled_font,
+ cairo_glyph_t *glyphs,
+ int num_glyphs,
+ cairo_bool_t overlap)
+{
+ const cairo_mask_compositor_t *compositor = (cairo_mask_compositor_t*)_compositor;
+ cairo_surface_t *mask;
+ cairo_surface_pattern_t pattern;
+ cairo_int_status_t status;
+
+ status = compositor->check_composite (extents);
+ if (unlikely (status))
+ return CAIRO_INT_STATUS_UNSUPPORTED;
+
+ mask = cairo_surface_create_similar_image (extents->surface,
+ CAIRO_FORMAT_A8,
+ extents->bounded.width,
+ extents->bounded.height);
+ if (unlikely (mask->status))
+ return mask->status;
+
+ status = _cairo_surface_offset_glyphs (mask,
+ extents->bounded.x,
+ extents->bounded.y,
+ CAIRO_OPERATOR_ADD,
+ &_cairo_pattern_white.base,
+ scaled_font, glyphs, num_glyphs,
+ extents->clip);
+ if (unlikely (status)) {
+ cairo_surface_destroy (mask);
+ return status;
+ }
+
+ _cairo_pattern_init_for_surface (&pattern, mask);
+ cairo_surface_destroy (mask);
+
+ cairo_matrix_init_translate (&pattern.base.matrix,
+ -extents->bounded.x,
+ -extents->bounded.y);
+ pattern.base.filter = CAIRO_FILTER_NEAREST;
+ pattern.base.extend = CAIRO_EXTEND_NONE;
+ status = _cairo_surface_mask (extents->surface,
+ extents->op,
+ &extents->source_pattern.base,
+ &pattern.base,
+ extents->clip);
+ _cairo_pattern_fini (&pattern.base);
+
+ return status;
+}
+
+void
+_cairo_mask_compositor_init (cairo_mask_compositor_t *compositor,
+ const cairo_compositor_t *delegate)
+{
+ compositor->base.delegate = delegate;
+
+ compositor->base.paint = _cairo_mask_compositor_paint;
+ compositor->base.mask = _cairo_mask_compositor_mask;
+ compositor->base.fill = _cairo_mask_compositor_fill;
+ compositor->base.stroke = _cairo_mask_compositor_stroke;
+ compositor->base.glyphs = _cairo_mask_compositor_glyphs;
+}