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diff --git a/o3d/samples/o3d-webgl/render_surface.js b/o3d/samples/o3d-webgl/render_surface.js
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+/*
+ * Copyright 2010, Google 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:
+ *
+ *     * 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 Google 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 BY THE COPYRIGHT HOLDERS AND 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 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.
+ */
+
+
+/**
+ * A RenderSurfaceBase is the base for RenderSurface and
+ * RenderDepthStencilSurface.
+ * 
+ * @param {number} width The width of this RenderSurface.
+ * @param {number} height The height of this RenderSurface.
+ * @param {o3d.Texture} texture The texture of this RenderSurface.
+ * @constructor
+ */
+o3d.RenderSurfaceBase = function(width, height, texture) {
+  o3d.ParamObject.call(this);
+};
+o3d.inherit('RenderSurfaceBase', 'ParamObject');
+
+
+/**
+ * The width of the surface, in pixels.
+ * @type {number}
+ */
+o3d.RenderSurfaceBase.prototype.width = 0;
+
+
+
+/**
+ * The height of the surface, in pixels.
+ * @type {number}
+ */
+o3d.RenderSurfaceBase.prototype.height = 0;
+
+
+
+/**
+ * A RenderSurface encapsulates the notion of a renderable surface.
+ * When used in conjunction with a RenderSurfaceSet node in the render graph,
+ * the API allows for rendering of primitives to the given surface.
+ * RenderSurface objects are not constructable through the Pack API, they may
+ * only be accessed through the texture getRenderSurface(...) interfaces.
+ * @constructor
+ */
+o3d.RenderSurface = function() { };
+o3d.inherit('RenderSurface', 'RenderSurfaceBase');
+
+
+/**
+ * The texture in which this surface is contained.
+ */
+o3d.RenderSurface.prototype.texture = null;
+
+
+/**
+ * A RenderDepthStencilSurface represents a depth stencil render surface.
+ * @constructor
+ */
+o3d.RenderDepthStencilSurface = function() { };
+o3d.inherit('RenderDepthStencilSurface', 'RenderSurfaceBase');
+
+