src/content/browser/android/in_process/synchronous_compositor_output_surface.h

   1 // Copyright 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_BROWSER_ANDROID_IN_PROCESS_SYNCHRONOUS_COMPOSITOR_OUTPUT_SURFACE_H_
   6 #define CONTENT_BROWSER_ANDROID_IN_PROCESS_SYNCHRONOUS_COMPOSITOR_OUTPUT_SURFACE_H_
   7
   8 #include "base/basictypes.h"
   9 #include "base/compiler_specific.h"
  10 #include "base/memory/ref_counted.h"
  11 #include "base/memory/scoped_ptr.h"
  12 #include "cc/output/managed_memory_policy.h"
  13 #include "cc/output/output_surface.h"
  14 #include "content/public/browser/android/synchronous_compositor.h"
  15 #include "ui/gfx/transform.h"
  16
  17 namespace cc {
  18 class ContextProvider;
  19 class CompositorFrameMetadata;
  20 }
  21
  22 namespace content {
  23
  24 class SynchronousCompositorClient;
  25 class SynchronousCompositorOutputSurface;
  26 class WebGraphicsContext3DCommandBufferImpl;
  27
  28 class SynchronousCompositorOutputSurfaceDelegate {
  29  public:
  30    virtual void DidBindOutputSurface(
  31       SynchronousCompositorOutputSurface* output_surface) = 0;
  32   virtual void DidDestroySynchronousOutputSurface(
  33       SynchronousCompositorOutputSurface* output_surface) = 0;
  34   virtual void SetContinuousInvalidate(bool enable) = 0;
  35   virtual void UpdateFrameMetaData(
  36       const cc::CompositorFrameMetadata& frame_metadata) = 0;
  37   virtual void DidActivatePendingTree() = 0;
  38
  39  protected:
  40   SynchronousCompositorOutputSurfaceDelegate() {}
  41   virtual ~SynchronousCompositorOutputSurfaceDelegate() {}
  42 };
  43
  44 // Specialization of the output surface that adapts it to implement the
  45 // content::SynchronousCompositor public API. This class effects an "inversion
  46 // of control" - enabling drawing to be  orchestrated by the embedding
  47 // layer, instead of driven by the compositor internals - hence it holds two
  48 // 'client' pointers (|client_| in the OutputSurface baseclass and
  49 // GetDelegate()) which represent the consumers of the two roles in plays.
  50 // This class can be created only on the main thread, but then becomes pinned
  51 // to a fixed thread when BindToClient is called.
  52 class SynchronousCompositorOutputSurface
  53     : NON_EXPORTED_BASE(public cc::OutputSurface) {
  54  public:
  55   explicit SynchronousCompositorOutputSurface(int routing_id);
  56   virtual ~SynchronousCompositorOutputSurface();
  57
  58   // OutputSurface.
  59   virtual bool ForcedDrawToSoftwareDevice() const OVERRIDE;
  60   virtual bool BindToClient(cc::OutputSurfaceClient* surface_client) OVERRIDE;
  61   virtual void Reshape(gfx::Size size, float scale_factor) OVERRIDE;
  62   virtual void SetNeedsBeginImplFrame(bool enable) OVERRIDE;
  63   virtual void SwapBuffers(cc::CompositorFrame* frame) OVERRIDE;
  64
  65   // Partial SynchronousCompositor API implementation.
  66   bool InitializeHwDraw(
  67       scoped_refptr<gfx::GLSurface> surface,
  68       scoped_refptr<cc::ContextProvider> offscreen_context_provider);
  69   void ReleaseHwDraw();
  70   bool DemandDrawHw(gfx::Size surface_size,
  71                     const gfx::Transform& transform,
  72                     gfx::Rect viewport,
  73                     gfx::Rect clip,
  74                     bool stencil_enabled);
  75   bool DemandDrawSw(SkCanvas* canvas);
  76   void SetMemoryPolicy(const SynchronousCompositorMemoryPolicy& policy);
  77
  78  private:
  79   class SoftwareDevice;
  80   friend class SoftwareDevice;
  81
  82   // Private OutputSurface overrides.
  83   virtual void PostCheckForRetroactiveBeginImplFrame() OVERRIDE;
  84
  85   void InvokeComposite(const gfx::Transform& transform,
  86                        gfx::Rect viewport,
  87                        gfx::Rect clip,
  88                        bool valid_for_tile_management);
  89   bool CalledOnValidThread() const;
  90   SynchronousCompositorOutputSurfaceDelegate* GetDelegate();
  91
  92   int routing_id_;
  93   bool needs_begin_impl_frame_;
  94   bool invoking_composite_;
  95   bool did_swap_buffer_;
  96
  97   gfx::Transform cached_hw_transform_;
  98   gfx::Rect cached_hw_viewport_;
  99   gfx::Rect cached_hw_clip_;
 100
 101   // Only valid (non-NULL) during a DemandDrawSw() call.
 102   SkCanvas* current_sw_canvas_;
 103
 104   cc::ManagedMemoryPolicy memory_policy_;
 105
 106   cc::OutputSurfaceClient* output_surface_client_;
 107
 108   DISALLOW_COPY_AND_ASSIGN(SynchronousCompositorOutputSurface);
 109 };
 110
 111 }  // namespace content
 112
 113 #endif  // CONTENT_BROWSER_ANDROID_IN_PROCESS_SYNCHRONOUS_COMPOSITOR_OUTPUT_SURFACE_H_