content/renderer/android/synchronous_compositor_output_surface.h

   1 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CONTENT_RENDERER_ANDROID_SYNCHRONOUS_COMPOSITOR_OUTPUT_SURFACE_H_
   6 #define CONTENT_RENDERER_ANDOIRD_SYNCHRONOUS_COMPOSITOR_OUTPUT_SURFACE_H_
   7
   8 #include "base/basictypes.h"
   9 #include "base/compiler_specific.h"
  10 #include "base/memory/scoped_ptr.h"
  11 #include "cc/output/output_surface.h"
  12 #include "content/public/renderer/android/synchronous_compositor.h"
  13
  14 namespace content {
  15
  16 class SynchronousCompositorClient;
  17 class WebGraphicsContext3DCommandBufferImpl;
  18
  19 // Specialization of the output surface that adapts it to implement the
  20 // content::SynchronousCompositor public API. This class effects an "inversion
  21 // of control" - enabling drawing to be  orchestrated by the embedding
  22 // layer, instead of driven by the compositor internals - hence it holds two
  23 // 'client' pointers (including |client_| in the OutputSurface baseclass) which
  24 // represent the consumers of the two roles in plays.
  25 // This class can be created only on the main thread, but then becomes pinned
  26 // to a fixed thread when BindToClient is called.
  27 class SynchronousCompositorOutputSurface
  28     : NON_EXPORTED_BASE(public cc::OutputSurface),
  29       NON_EXPORTED_BASE(public SynchronousCompositor) {
  30  public:
  31   SynchronousCompositorOutputSurface(
  32       int32 routing_id,
  33       WebGraphicsContext3DCommandBufferImpl* context);
  34   virtual ~SynchronousCompositorOutputSurface();
  35
  36   // OutputSurface.
  37   virtual bool BindToClient(cc::OutputSurfaceClient* surface_client) OVERRIDE;
  38   virtual void SendFrameToParentCompositor(cc::CompositorFrame* frame) OVERRIDE;
  39
  40   // SynchronousCompositor.
  41   virtual void SetClient(SynchronousCompositorClient* compositor_client)
  42       OVERRIDE;
  43   virtual bool DemandDrawSw(SkCanvas* canvas) OVERRIDE;
  44
  45  private:
  46   bool CalledOnValidThread() const;
  47
  48   SynchronousCompositorClient* compositor_client_;
  49   int routing_id_;
  50
  51   DISALLOW_COPY_AND_ASSIGN(SynchronousCompositorOutputSurface);
  52 };
  53
  54 }  // namespace content
  55
  56 #endif  // CONTENT_RENDERER_ANDROID_SYNCHRONOUS_COMPOSITOR_OUTPUT_SURFACE_H_