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-rw-r--r--libs/cairo-1.16.0/src/cairo-damage.c241
1 files changed, 241 insertions, 0 deletions
diff --git a/libs/cairo-1.16.0/src/cairo-damage.c b/libs/cairo-1.16.0/src/cairo-damage.c
new file mode 100644
index 0000000..97d9fe9
--- /dev/null
+++ b/libs/cairo-1.16.0/src/cairo-damage.c
@@ -0,0 +1,241 @@
+/*
+ * Copyright © 2012 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 Chris Wilson
+ *
+ * Contributor(s):
+ * Chris Wilson <chris@chris-wilson.co.uk>
+ */
+
+#include "cairoint.h"
+
+#include "cairo-damage-private.h"
+#include "cairo-region-private.h"
+
+static const cairo_damage_t __cairo_damage__nil = { CAIRO_STATUS_NO_MEMORY };
+
+cairo_damage_t *
+_cairo_damage_create_in_error (cairo_status_t status)
+{
+ _cairo_error_throw (status);
+ return (cairo_damage_t *) &__cairo_damage__nil;
+}
+
+cairo_damage_t *
+_cairo_damage_create (void)
+{
+ cairo_damage_t *damage;
+
+ damage = _cairo_malloc (sizeof (*damage));
+ if (unlikely (damage == NULL)) {
+ _cairo_error_throw(CAIRO_STATUS_NO_MEMORY);
+ return (cairo_damage_t *) &__cairo_damage__nil;
+ }
+
+ damage->status = CAIRO_STATUS_SUCCESS;
+ damage->region = NULL;
+ damage->dirty = 0;
+ damage->tail = &damage->chunks;
+ damage->chunks.base = damage->boxes;
+ damage->chunks.size = ARRAY_LENGTH(damage->boxes);
+ damage->chunks.count = 0;
+ damage->chunks.next = NULL;
+
+ damage->remain = damage->chunks.size;
+
+ return damage;
+}
+
+void
+_cairo_damage_destroy (cairo_damage_t *damage)
+{
+ struct _cairo_damage_chunk *chunk, *next;
+
+ if (damage == (cairo_damage_t *) &__cairo_damage__nil)
+ return;
+
+ for (chunk = damage->chunks.next; chunk != NULL; chunk = next) {
+ next = chunk->next;
+ free (chunk);
+ }
+ cairo_region_destroy (damage->region);
+ free (damage);
+}
+
+static cairo_damage_t *
+_cairo_damage_add_boxes(cairo_damage_t *damage,
+ const cairo_box_t *boxes,
+ int count)
+{
+ struct _cairo_damage_chunk *chunk;
+ int n, size;
+
+ TRACE ((stderr, "%s x%d\n", __FUNCTION__, count));
+
+ if (damage == NULL)
+ damage = _cairo_damage_create ();
+ if (damage->status)
+ return damage;
+
+ damage->dirty += count;
+
+ n = count;
+ if (n > damage->remain)
+ n = damage->remain;
+
+ memcpy (damage->tail->base + damage->tail->count, boxes,
+ n * sizeof (cairo_box_t));
+
+ count -= n;
+ damage->tail->count += n;
+ damage->remain -= n;
+
+ if (count == 0)
+ return damage;
+
+ size = 2 * damage->tail->size;
+ if (size < count)
+ size = (count + 64) & ~63;
+
+ chunk = _cairo_malloc (sizeof (*chunk) + sizeof (cairo_box_t) * size);
+ if (unlikely (chunk == NULL)) {
+ _cairo_damage_destroy (damage);
+ return (cairo_damage_t *) &__cairo_damage__nil;
+ }
+
+ chunk->next = NULL;
+ chunk->base = (cairo_box_t *) (chunk + 1);
+ chunk->size = size;
+ chunk->count = count;
+
+ damage->tail->next = chunk;
+ damage->tail = chunk;
+
+ memcpy (damage->tail->base, boxes + n,
+ count * sizeof (cairo_box_t));
+ damage->remain = size - count;
+
+ return damage;
+}
+
+cairo_damage_t *
+_cairo_damage_add_box(cairo_damage_t *damage,
+ const cairo_box_t *box)
+{
+ TRACE ((stderr, "%s: (%d, %d),(%d, %d)\n", __FUNCTION__,
+ box->p1.x, box->p1.y, box->p2.x, box->p2.y));
+
+ return _cairo_damage_add_boxes(damage, box, 1);
+}
+
+cairo_damage_t *
+_cairo_damage_add_rectangle(cairo_damage_t *damage,
+ const cairo_rectangle_int_t *r)
+{
+ cairo_box_t box;
+
+ TRACE ((stderr, "%s: (%d, %d)x(%d, %d)\n", __FUNCTION__,
+ r->x, r->y, r->width, r->height));
+
+ box.p1.x = r->x;
+ box.p1.y = r->y;
+ box.p2.x = r->x + r->width;
+ box.p2.y = r->y + r->height;
+
+ return _cairo_damage_add_boxes(damage, &box, 1);
+}
+
+cairo_damage_t *
+_cairo_damage_add_region (cairo_damage_t *damage,
+ const cairo_region_t *region)
+{
+ cairo_box_t *boxes;
+ int nbox;
+
+ TRACE ((stderr, "%s\n", __FUNCTION__));
+
+ boxes = _cairo_region_get_boxes (region, &nbox);
+ return _cairo_damage_add_boxes(damage, boxes, nbox);
+}
+
+cairo_damage_t *
+_cairo_damage_reduce (cairo_damage_t *damage)
+{
+ cairo_box_t *free_boxes = NULL;
+ cairo_box_t *boxes, *b;
+ struct _cairo_damage_chunk *chunk, *last;
+
+ TRACE ((stderr, "%s: dirty=%d\n", __FUNCTION__,
+ damage ? damage->dirty : -1));
+ if (damage == NULL || damage->status || !damage->dirty)
+ return damage;
+
+ if (damage->region) {
+ cairo_region_t *region;
+
+ region = damage->region;
+ damage->region = NULL;
+
+ damage = _cairo_damage_add_region (damage, region);
+ cairo_region_destroy (region);
+
+ if (unlikely (damage->status))
+ return damage;
+ }
+
+ boxes = damage->tail->base;
+ if (damage->dirty > damage->tail->size) {
+ boxes = free_boxes = _cairo_malloc (damage->dirty * sizeof (cairo_box_t));
+ if (unlikely (boxes == NULL)) {
+ _cairo_damage_destroy (damage);
+ return (cairo_damage_t *) &__cairo_damage__nil;
+ }
+
+ b = boxes;
+ last = NULL;
+ } else {
+ b = boxes + damage->tail->count;
+ last = damage->tail;
+ }
+
+ for (chunk = &damage->chunks; chunk != last; chunk = chunk->next) {
+ memcpy (b, chunk->base, chunk->count * sizeof (cairo_box_t));
+ b += chunk->count;
+ }
+
+ damage->region = _cairo_region_create_from_boxes (boxes, damage->dirty);
+ free (free_boxes);
+
+ if (unlikely (damage->region->status)) {
+ _cairo_damage_destroy (damage);
+ return (cairo_damage_t *) &__cairo_damage__nil;
+ }
+
+ damage->dirty = 0;
+ return damage;
+}
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