1 files changed, 123 insertions, 0 deletions
diff --git a/libs/cairo-1.16.0/src/cairo-clip-region.c b/libs/cairo-1.16.0/src/cairo-clip-region.c
new file mode 100644
index 0000000..e3f4891
--- /dev/null
+++ b/libs/cairo-1.16.0/src/cairo-clip-region.c
@@ -0,0 +1,123 @@
+/* -*- 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"
+
+static void
+_cairo_clip_extract_region (cairo_clip_t *clip)
+{
+    cairo_rectangle_int_t stack_rects[CAIRO_STACK_ARRAY_LENGTH (cairo_rectangle_int_t)];
+    cairo_rectangle_int_t *r = stack_rects;
+    cairo_bool_t is_region;
+    int i;
+
+    if (clip->num_boxes == 0)
+	return;
+
+    if (clip->num_boxes > ARRAY_LENGTH (stack_rects)) {
+	r = _cairo_malloc_ab (clip->num_boxes, sizeof (cairo_rectangle_int_t));
+	if (r == NULL){
+	    _cairo_error_throw (CAIRO_STATUS_NO_MEMORY);
+	    return;
+	}
+    }
+
+    is_region = clip->path == NULL;
+    for (i = 0; i < clip->num_boxes; i++) {
+	cairo_box_t *b = &clip->boxes[i];
+	if (is_region)
+	    is_region =
+		_cairo_fixed_is_integer (b->p1.x | b->p1.y |  b->p2.x | b->p2.y);
+	r[i].x = _cairo_fixed_integer_floor (b->p1.x);
+	r[i].y = _cairo_fixed_integer_floor (b->p1.y);
+	r[i].width  = _cairo_fixed_integer_ceil (b->p2.x) - r[i].x;
+	r[i].height = _cairo_fixed_integer_ceil (b->p2.y) - r[i].y;
+    }
+    clip->is_region = is_region;
+
+    clip->region = cairo_region_create_rectangles (r, i);
+
+    if (r != stack_rects)
+	free (r);
+}
+
+cairo_region_t *
+_cairo_clip_get_region (const cairo_clip_t *clip)
+{
+    if (clip == NULL)
+	return NULL;
+
+    if (clip->region == NULL)
+	_cairo_clip_extract_region ((cairo_clip_t *) clip);
+
+    return clip->region;
+}
+
+cairo_bool_t
+_cairo_clip_is_region (const cairo_clip_t *clip)
+{
+    if (clip == NULL)
+	return TRUE;
+
+    if (clip->is_region)
+	return TRUE;
+
+    /* XXX Geometric reduction? */
+
+    if (clip->path)
+	return FALSE;
+
+    if (clip->num_boxes == 0)
+	return TRUE;
+
+    if (clip->region == NULL)
+	_cairo_clip_extract_region ((cairo_clip_t *) clip);
+
+    return clip->is_region;
+}