external/webkit r30707

1 files changed, 72 insertions, 0 deletions

diff --git a/WebCore/html/CanvasPixelArray.h b/WebCore/html/CanvasPixelArray.h
new file mode 100644
index 0000000..1a7e69b
--- /dev/null
+++ b/WebCore/html/CanvasPixelArray.h
@@ -0,0 +1,72 @@
+/*
+ * Copyright (C) 2008 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1.  Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ * 2.  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.
+ * 3.  Neither the name of Apple Computer, Inc. ("Apple") 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 BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS 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.
+ */
+
+#ifndef CanvasPixelArray_h
+#define CanvasPixelArray_h
+
+#include <wtf/MathExtras.h>
+#include <wtf/PassRefPtr.h>
+#include <wtf/RefCounted.h>
+#include <wtf/Vector.h>
+
+namespace WebCore {
+    
+    class CanvasPixelArray : public RefCounted<CanvasPixelArray> {
+    public:
+        static PassRefPtr<CanvasPixelArray> create(unsigned size);
+
+        Vector<unsigned char>& data() { return m_data; }
+        unsigned length() const { return m_data.size(); }
+
+        void set(unsigned index, double value)
+        {
+            if (index >= m_data.size())
+                return;
+            if (!(value > 0)) // Clamp NaN to 0
+                value = 0;
+            else if (value > 255)
+                value = 255;
+            m_data[index] = lround(value);
+        }
+
+        bool get(unsigned index, unsigned char& result) const
+        {
+            if (index >= m_data.size())
+                return false;
+            result = m_data[index];
+            return true;
+        }
+
+    private:
+        CanvasPixelArray(unsigned size);
+        Vector<unsigned char> m_data;
+    };
+    
+} // namespace WebCore
+
+#endif // CanvasPixelArray_h