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diff --git a/ppapi/cpp/image_data.h b/ppapi/cpp/image_data.h
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+++ b/ppapi/cpp/image_data.h
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+// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef PPAPI_CPP_IMAGE_DATA_H_
+#define PPAPI_CPP_IMAGE_DATA_H_
+
+#include "ppapi/c/ppb_image_data.h"
+#include "ppapi/cpp/point.h"
+#include "ppapi/cpp/size.h"
+#include "ppapi/cpp/resource.h"
+
+namespace pp {
+
+class Plugin;
+
+class ImageData : public Resource {
+ public:
+  // Creates an is_null() ImageData object.
+  ImageData();
+
+  // This magic constructor is used when we've gotten a PP_Resource as a return
+  // value that has already been addref'ed for us.
+  struct PassRef {};
+  ImageData(PassRef, PP_Resource resource);
+
+  ImageData(const ImageData& other);
+
+  // Allocates a new ImageData in the browser with the given parameters. The
+  // resulting object will be is_null() if the allocation failed.
+  ImageData(PP_ImageDataFormat format,
+            const Size& size,
+            bool init_to_zero);
+
+  virtual ~ImageData();
+
+  ImageData& operator=(const ImageData& other);
+  void swap(ImageData& other);
+
+  // Returns the browser's preferred format for images. Using this format
+  // guarantees no extra conversions will occur when painting.
+  static PP_ImageDataFormat GetNativeImageDataFormat();
+
+  PP_ImageDataFormat format() const { return desc_.format; }
+
+  pp::Size size() const { return desc_.size; }
+  int32_t stride() const { return desc_.stride; }
+
+  void* data() const { return data_; }
+
+  // Helper function to retrieve the address of the given pixel for 32-bit
+  // pixel formats.
+  const uint32_t* GetAddr32(const Point& coord) const;
+  uint32_t* GetAddr32(const Point& coord);
+
+ private:
+  void PassRefAndInitData(PP_Resource resource);
+
+  PP_ImageDataDesc desc_;
+  void* data_;
+};
+
+}  // namespace pp
+
+#endif  // PPAPI_CPP_IMAGE_DATA_H_