diff -r 000000000000 -r 6474c204b198 content/canvas/src/WebGLRenderbuffer.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/content/canvas/src/WebGLRenderbuffer.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,81 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef WEBGLRENDERBUFFER_H_
+#define WEBGLRENDERBUFFER_H_
+
+#include "WebGLObjectModel.h"
+#include "WebGLFramebufferAttachable.h"
+
+#include "nsWrapperCache.h"
+
+#include "mozilla/LinkedList.h"
+
+namespace mozilla {
+
+class WebGLRenderbuffer MOZ_FINAL
+    : public nsWrapperCache
+    , public WebGLRefCountedObject<WebGLRenderbuffer>
+    , public LinkedListElement<WebGLRenderbuffer>
+    , public WebGLRectangleObject
+    , public WebGLContextBoundObject
+    , public WebGLFramebufferAttachable
+{
+public:
+    WebGLRenderbuffer(WebGLContext *context);
+
+    ~WebGLRenderbuffer() {
+        DeleteOnce();
+    }
+
+    void Delete();
+
+    bool HasEverBeenBound() { return mHasEverBeenBound; }
+    void SetHasEverBeenBound(bool x) { mHasEverBeenBound = x; }
+
+    bool HasUninitializedImageData() const { return mImageDataStatus == WebGLImageDataStatus::UninitializedImageData; }
+    void SetImageDataStatus(WebGLImageDataStatus x) {
+        // there is no way to go from having image data to not having any
+        MOZ_ASSERT(x != WebGLImageDataStatus::NoImageData ||
+                   mImageDataStatus == WebGLImageDataStatus::NoImageData);
+        mImageDataStatus = x;
+    }
+
+    GLenum InternalFormat() const { return mInternalFormat; }
+    void SetInternalFormat(GLenum aInternalFormat) { mInternalFormat = aInternalFormat; }
+
+    GLenum InternalFormatForGL() const { return mInternalFormatForGL; }
+    void SetInternalFormatForGL(GLenum aInternalFormatForGL) { mInternalFormatForGL = aInternalFormatForGL; }
+
+    int64_t MemoryUsage() const;
+
+    WebGLContext *GetParentObject() const {
+        return Context();
+    }
+
+    void BindRenderbuffer() const;
+    void RenderbufferStorage(GLenum internalFormat, GLsizei width, GLsizei height) const;
+    void FramebufferRenderbuffer(GLenum attachment) const;
+    // Only handles a subset of `pname`s.
+    GLint GetRenderbufferParameter(GLenum target, GLenum pname) const;
+
+    virtual JSObject* WrapObject(JSContext *cx) MOZ_OVERRIDE;
+
+    NS_INLINE_DECL_CYCLE_COLLECTING_NATIVE_REFCOUNTING(WebGLRenderbuffer)
+    NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_NATIVE_CLASS(WebGLRenderbuffer)
+
+protected:
+    GLuint mPrimaryRB;
+    GLuint mSecondaryRB;
+    GLenum mInternalFormat;
+    GLenum mInternalFormatForGL;
+    bool mHasEverBeenBound;
+    WebGLImageDataStatus mImageDataStatus;
+
+    friend class WebGLFramebuffer;
+};
+} // namespace mozilla
+
+#endif