From f79ec0f39840694596b663eb403a6e5f673f2554 Mon Sep 17 00:00:00 2001
From: Naomi Luis <nluis@codeaurora.org>
Date: Tue, 29 Nov 2011 16:00:36 -0800
Subject: [PATCH] libcopybit: Add copybit iterator.

Add the copybit iterator which takes a single rectangle as an input.

Change-Id: I6fd496450c29ed06ffbfad62b5c880e837450791
---
 libcopybit/copybit_priv.h | 57 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 57 insertions(+)
 create mode 100644 libcopybit/copybit_priv.h

diff --git a/libcopybit/copybit_priv.h b/libcopybit/copybit_priv.h
new file mode 100644
index 0000000..7fdd508
--- /dev/null
+++ b/libcopybit/copybit_priv.h
@@ -0,0 +1,57 @@
+/*
+ * Copyright (c) 2011, Code Aurora Forum. All rights reserved.
+
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *   * Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ *   * Redistributions in binary form must reproduce the above
+ *     copyright notice, this list of conditions and the following
+ *     disclaimer in the documentation and/or other materials provided
+ *     with the distribution.
+ *   * Neither the name of Code Aurora Forum, Inc. nor the names of its
+ *     contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <copybit.h>
+struct copybit_iterator : public copybit_region_t {
+    copybit_iterator(const copybit_rect_t& rect) {
+        mRect = rect;
+        mCount = 1;
+        this->next = iterate;
+    }
+private:
+    static int iterate(copybit_region_t const * self, copybit_rect_t* rect) {
+        if (!self || !rect) {
+            return 0;
+        }
+
+        copybit_iterator const* me = static_cast<copybit_iterator const*>(self);
+        if (me->mCount) {
+            rect->l = me->mRect.l;
+            rect->t = me->mRect.t;
+            rect->r = me->mRect.r;
+            rect->b = me->mRect.b;
+            me->mCount--;
+            return 1;
+        }
+        return 0;
+    }
+    copybit_rect_t mRect;
+    mutable int mCount;
+};
+