Abstract PPAPI's ImageData behind webrtc::DesktopFrame interface

remoting/client/plugin/pepper_view.h

 // Copyright (c) 2012 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.
 
 // This class is an implementation of the ChromotingView for Pepper.  It is
 // callable only on the Pepper thread.
 
 #ifndef REMOTING_CLIENT_PLUGIN_PEPPER_VIEW_H_
 #define REMOTING_CLIENT_PLUGIN_PEPPER_VIEW_H_
 
 #include <list>
 
 #include "base/memory/weak_ptr.h"
 #include "ppapi/cpp/graphics_2d.h"
 #include "ppapi/cpp/view.h"
 #include "ppapi/cpp/point.h"
 #include "remoting/client/frame_consumer.h"
 
 namespace base {
 class Time;
 }  // namespace base
 
 namespace remoting {
 
 class ChromotingInstance;
 class ClientContext;
 class FrameProducer;
+class ImageBuffer;
 
 class PepperView : public FrameConsumer,
                    public base::SupportsWeakPtr<PepperView> {
  public:
   // Constructs a PepperView for the |instance|. The |instance|, |context|
   // and |producer| must outlive this class.
   PepperView(ChromotingInstance* instance,
              ClientContext* context,
              FrameProducer* producer);
   virtual ~PepperView();
 
   // FrameConsumer implementation.
   virtual void ApplyBuffer(const SkISize& view_size,
                            const SkIRect& clip_area,
-                           pp::ImageData* buffer,
+                           ImageBuffer* buffer,
                            const SkRegion& region) OVERRIDE;
-  virtual void ReturnBuffer(pp::ImageData* buffer) OVERRIDE;
+  virtual void ReturnBuffer(ImageBuffer* buffer) OVERRIDE;
   virtual void SetSourceSize(const SkISize& source_size,
                              const SkIPoint& dpi) OVERRIDE;
 
   // Updates the PepperView's size & clipping area, taking into account the
   // DIP-to-device scale factor.
   void SetView(const pp::View& view);
 
   // Returns the dimensions of the most recently displayed frame, in pixels.
   const SkISize& get_source_size() const {
     return source_size_;
   }
 
   // Return the dimensions of the view in Density Independent Pixels (DIPs).
   // Note that there may be multiple device pixels per DIP.
   const SkISize& get_view_size_dips() const {
     return dips_size_;
   }
 
  private:
   // Allocates a new frame buffer to supply to the FrameProducer to render into.
   // Returns NULL if the maximum number of buffers has already been allocated.
-  pp::ImageData* AllocateBuffer();
+  ImageBuffer* AllocateBuffer();
 
   // Frees a frame buffer previously allocated by AllocateBuffer.
-  void FreeBuffer(pp::ImageData* buffer);
+  void FreeBuffer(ImageBuffer* buffer);
 
   // Allocates buffers and passes them to the FrameProducer to render into until
   // the maximum number of buffers are in-flight.
   void InitiateDrawing();
 
   // Renders the parts of |buffer| identified by |region| to the view.  If the
   // clip area of the view has changed since the buffer was generated then
   // FrameProducer is supplied the missed parts of |region|.  The FrameProducer
   // will be supplied a new buffer when FlushBuffer() completes.
   void FlushBuffer(const SkIRect& clip_area,
-                   pp::ImageData* buffer,
+                   ImageBuffer* buffer,
                    const SkRegion& region);
 
   // Handles completion of FlushBuffer(), triggering a new buffer to be
   // returned to FrameProducer for rendering.
-  void OnFlushDone(base::Time paint_start, pp::ImageData* buffer, int result);
+  void OnFlushDone(base::Time paint_start, ImageBuffer* buffer, int result);
 
   // Reference to the creating plugin instance. Needed for interacting with
   // pepper.  Marking explicitly as const since it must be initialized at
   // object creation, and never change.
   ChromotingInstance* const instance_;
 
   // Context should be constant for the lifetime of the plugin.
   ClientContext* const context_;
 
   pp::Graphics2D graphics2d_;
 
   FrameProducer* producer_;
 
   // List of allocated image buffers.
-  std::list<pp::ImageData*> buffers_;
+  std::list<ImageBuffer*> buffers_;
 
   // Queued buffer to paint, with clip area and dirty region in device pixels.
-  pp::ImageData* merge_buffer_;
+  ImageBuffer* merge_buffer_;
   SkIRect merge_clip_area_;
   SkRegion merge_region_;
 
   // View size in Density Independent Pixels (DIPs).
   SkISize dips_size_;
 
   // Scale factor from DIPs to device pixels.
   float dips_to_device_scale_;
 
   // View size in output pixels. This is the size at which FrameProducer must
@@ skipping 21 matching lines @@
 
   // True after the first call to ApplyBuffer().
   bool frame_received_;
 
   DISALLOW_COPY_AND_ASSIGN(PepperView);
 };
 
 }  // namespace remoting
 
 #endif  // REMOTING_CLIENT_PLUGIN_PEPPER_VIEW_H_