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Diffstat (limited to 'libs/cairo-1.16.0/src/cairo-clip-surface.c')
-rw-r--r--libs/cairo-1.16.0/src/cairo-clip-surface.c240
1 files changed, 240 insertions, 0 deletions
diff --git a/libs/cairo-1.16.0/src/cairo-clip-surface.c b/libs/cairo-1.16.0/src/cairo-clip-surface.c
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+++ b/libs/cairo-1.16.0/src/cairo-clip-surface.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 © 2009 Chris Wilson
+ *
+ * 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>
+ * Kristian Høgsberg <krh@redhat.com>
+ * Chris Wilson <chris@chris-wilson.co.uk>
+ */
+
+#include "cairoint.h"
+#include "cairo-clip-private.h"
+#include "cairo-error-private.h"
+#include "cairo-freed-pool-private.h"
+#include "cairo-gstate-private.h"
+#include "cairo-path-fixed-private.h"
+#include "cairo-pattern-private.h"
+#include "cairo-composite-rectangles-private.h"
+#include "cairo-region-private.h"
+
+cairo_status_t
+_cairo_clip_combine_with_surface (const cairo_clip_t *clip,
+ cairo_surface_t *dst,
+ int dst_x, int dst_y)
+{
+ cairo_clip_path_t *copy_path;
+ cairo_clip_path_t *clip_path;
+ cairo_clip_t *copy;
+ cairo_status_t status = CAIRO_STATUS_SUCCESS;
+
+ copy = _cairo_clip_copy_with_translation (clip, -dst_x, -dst_y);
+ copy_path = copy->path;
+ copy->path = NULL;
+
+ if (copy->boxes) {
+ status = _cairo_surface_paint (dst,
+ CAIRO_OPERATOR_IN,
+ &_cairo_pattern_white.base,
+ copy);
+ }
+
+ clip = NULL;
+ if (_cairo_clip_is_region (copy))
+ clip = copy;
+ clip_path = copy_path;
+ while (status == CAIRO_STATUS_SUCCESS && clip_path) {
+ status = _cairo_surface_fill (dst,
+ CAIRO_OPERATOR_IN,
+ &_cairo_pattern_white.base,
+ &clip_path->path,
+ clip_path->fill_rule,
+ clip_path->tolerance,
+ clip_path->antialias,
+ clip);
+ clip_path = clip_path->prev;
+ }
+
+ copy->path = copy_path;
+ _cairo_clip_destroy (copy);
+ return status;
+}
+
+static cairo_status_t
+_cairo_path_fixed_add_box (cairo_path_fixed_t *path,
+ const cairo_box_t *box,
+ cairo_fixed_t fx,
+ cairo_fixed_t fy)
+{
+ cairo_status_t status;
+
+ status = _cairo_path_fixed_move_to (path, box->p1.x + fx, box->p1.y + fy);
+ if (unlikely (status))
+ return status;
+
+ status = _cairo_path_fixed_line_to (path, box->p2.x + fx, box->p1.y + fy);
+ if (unlikely (status))
+ return status;
+
+ status = _cairo_path_fixed_line_to (path, box->p2.x + fx, box->p2.y + fy);
+ if (unlikely (status))
+ return status;
+
+ status = _cairo_path_fixed_line_to (path, box->p1.x + fx, box->p2.y + fy);
+ if (unlikely (status))
+ return status;
+
+ return _cairo_path_fixed_close_path (path);
+}
+
+cairo_surface_t *
+_cairo_clip_get_surface (const cairo_clip_t *clip,
+ cairo_surface_t *target,
+ int *tx, int *ty)
+{
+ cairo_surface_t *surface;
+ cairo_status_t status;
+ cairo_clip_t *copy, *region;
+ cairo_clip_path_t *copy_path, *clip_path;
+
+ if (clip->num_boxes) {
+ cairo_path_fixed_t path;
+ int i;
+
+ surface = _cairo_surface_create_scratch (target,
+ CAIRO_CONTENT_ALPHA,
+ clip->extents.width,
+ clip->extents.height,
+ CAIRO_COLOR_TRANSPARENT);
+ if (unlikely (surface->status))
+ return surface;
+
+ _cairo_path_fixed_init (&path);
+ status = CAIRO_STATUS_SUCCESS;
+ for (i = 0; status == CAIRO_STATUS_SUCCESS && i < clip->num_boxes; i++) {
+ status = _cairo_path_fixed_add_box (&path, &clip->boxes[i],
+ -_cairo_fixed_from_int (clip->extents.x),
+ -_cairo_fixed_from_int (clip->extents.y));
+ }
+ if (status == CAIRO_STATUS_SUCCESS)
+ status = _cairo_surface_fill (surface,
+ CAIRO_OPERATOR_ADD,
+ &_cairo_pattern_white.base,
+ &path,
+ CAIRO_FILL_RULE_WINDING,
+ 1.,
+ CAIRO_ANTIALIAS_DEFAULT,
+ NULL);
+ _cairo_path_fixed_fini (&path);
+ if (unlikely (status)) {
+ cairo_surface_destroy (surface);
+ return _cairo_surface_create_in_error (status);
+ }
+ } else {
+ surface = _cairo_surface_create_scratch (target,
+ CAIRO_CONTENT_ALPHA,
+ clip->extents.width,
+ clip->extents.height,
+ CAIRO_COLOR_WHITE);
+ if (unlikely (surface->status))
+ return surface;
+ }
+
+ copy = _cairo_clip_copy_with_translation (clip,
+ -clip->extents.x,
+ -clip->extents.y);
+ copy_path = copy->path;
+ copy->path = NULL;
+
+ region = copy;
+ if (! _cairo_clip_is_region (copy))
+ region = _cairo_clip_copy_region (copy);
+
+ status = CAIRO_STATUS_SUCCESS;
+ clip_path = copy_path;
+ while (status == CAIRO_STATUS_SUCCESS && clip_path) {
+ status = _cairo_surface_fill (surface,
+ CAIRO_OPERATOR_IN,
+ &_cairo_pattern_white.base,
+ &clip_path->path,
+ clip_path->fill_rule,
+ clip_path->tolerance,
+ clip_path->antialias,
+ region);
+ clip_path = clip_path->prev;
+ }
+
+ copy->path = copy_path;
+ _cairo_clip_destroy (copy);
+ if (region != copy)
+ _cairo_clip_destroy (region);
+
+ if (unlikely (status)) {
+ cairo_surface_destroy (surface);
+ return _cairo_surface_create_in_error (status);
+ }
+
+ *tx = clip->extents.x;
+ *ty = clip->extents.y;
+ return surface;
+}
+
+cairo_surface_t *
+_cairo_clip_get_image (const cairo_clip_t *clip,
+ cairo_surface_t *target,
+ const cairo_rectangle_int_t *extents)
+{
+ cairo_surface_t *surface;
+ cairo_status_t status;
+
+ surface = cairo_surface_create_similar_image (target,
+ CAIRO_FORMAT_A8,
+ extents->width,
+ extents->height);
+ if (unlikely (surface->status))
+ return surface;
+
+ status = _cairo_surface_paint (surface, CAIRO_OPERATOR_SOURCE,
+ &_cairo_pattern_white.base, NULL);
+ if (likely (status == CAIRO_STATUS_SUCCESS))
+ status = _cairo_clip_combine_with_surface (clip, surface,
+ extents->x, extents->y);
+
+ if (unlikely (status)) {
+ cairo_surface_destroy (surface);
+ surface = _cairo_surface_create_in_error (status);
+ }
+
+ return surface;
+}
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