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diff --git a/Source/WebCore/platform/graphics/filters/CustomFilterConstants.h b/Source/WebCore/platform/graphics/filters/CustomFilterConstants.h
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+++ b/Source/WebCore/platform/graphics/filters/CustomFilterConstants.h
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+/*
+ * Copyright (C) 2012 Adobe Systems Incorporated. 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “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 THE COPYRIGHT HOLDER 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 CustomFilterConstants_h
+#define CustomFilterConstants_h
+
+namespace WebCore {
+
+enum CustomFilterMeshConstants {
+    // Vertex attribute sizes
+    PositionAttribSize = 4,
+    TexAttribSize = 2,
+    MeshAttribSize = 2,
+    TriangleAttribSize = 3,
+    // Vertex attribute offsets
+    PositionAttribOffset = 0,
+    TexAttribOffset = PositionAttribOffset + PositionAttribSize * sizeof(float),
+    MeshAttribOffset = TexAttribOffset + TexAttribSize * sizeof(float),
+    TriangleAttribOffset = MeshAttribOffset + MeshAttribSize * sizeof(float)
+};
+
+} // namespace WebCore
+
+#endif // CustomFilterConstants_h