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 <vector>
   9
  10 #include "base/basictypes.h"
  11 #include "base/callback.h"
  12 #include "base/compiler_specific.h"
  13 #include "base/memory/ref_counted.h"
  14 #include "base/memory/scoped_ptr.h"
  15 #include "cc/output/compositor_frame.h"
  16 #include "cc/output/managed_memory_policy.h"
  17 #include "cc/output/output_surface.h"
  18 #include "content/public/browser/android/synchronous_compositor.h"
  19 #include "ipc/ipc_message.h"
  20 #include "ui/gfx/transform.h"
  21
  22 namespace cc {
  23 class ContextProvider;
  24 class CompositorFrameMetadata;
  25 }
  26
  27 namespace IPC {
  28 class Message;
  29 }
  30
  31 namespace content {
  32
  33 class FrameSwapMessageQueue;
  34 class SynchronousCompositorClient;
  35 class SynchronousCompositorExternalBeginFrameSource;
  36 class SynchronousCompositorOutputSurface;
  37 class WebGraphicsContext3DCommandBufferImpl;
  38
  39 // Specialization of the output surface that adapts it to implement the
  40 // content::SynchronousCompositor public API. This class effects an "inversion
  41 // of control" - enabling drawing to be  orchestrated by the embedding
  42 // layer, instead of driven by the compositor internals - hence it holds two
  43 // 'client' pointers (|client_| in the OutputSurface baseclass and
  44 // |delegate_|) which represent the consumers of the two roles in plays.
  45 // This class can be created only on the main thread, but then becomes pinned
  46 // to a fixed thread when BindToClient is called.
  47 class SynchronousCompositorOutputSurface
  48     : NON_EXPORTED_BASE(public cc::OutputSurface) {
  49  public:
  50   explicit SynchronousCompositorOutputSurface(
  51       int routing_id,
  52       scoped_refptr<FrameSwapMessageQueue> frame_swap_message_queue);
  53   ~SynchronousCompositorOutputSurface() override;
  54
  55   // OutputSurface.
  56   bool BindToClient(cc::OutputSurfaceClient* surface_client) override;
  57   void Reshape(const gfx::Size& size, float scale_factor) override;
  58   void SwapBuffers(cc::CompositorFrame* frame) override;
  59
  60   void SetBeginFrameSource(
  61       SynchronousCompositorExternalBeginFrameSource* begin_frame_source);
  62
  63   // Partial SynchronousCompositor API implementation.
  64   bool InitializeHwDraw(
  65       scoped_refptr<cc::ContextProvider> onscreen_context_provider,
  66       scoped_refptr<cc::ContextProvider> worker_context_provider);
  67   void ReleaseHwDraw();
  68   scoped_ptr<cc::CompositorFrame> DemandDrawHw(
  69       gfx::Size surface_size,
  70       const gfx::Transform& transform,
  71       gfx::Rect viewport,
  72       gfx::Rect clip,
  73       gfx::Rect viewport_rect_for_tile_priority,
  74       const gfx::Transform& transform_for_tile_priority);
  75   void ReturnResources(const cc::CompositorFrameAck& frame_ack);
  76   scoped_ptr<cc::CompositorFrame> DemandDrawSw(SkCanvas* canvas);
  77   void SetMemoryPolicy(size_t bytes_limit);
  78   void SetTreeActivationCallback(const base::Closure& callback);
  79   void GetMessagesToDeliver(ScopedVector<IPC::Message>* messages);
  80
  81  private:
  82   class SoftwareDevice;
  83   friend class SoftwareDevice;
  84
  85   void InvokeComposite(const gfx::Transform& transform,
  86                        gfx::Rect viewport,
  87                        gfx::Rect clip,
  88                        gfx::Rect viewport_rect_for_tile_priority,
  89                        gfx::Transform transform_for_tile_priority,
  90                        bool hardware_draw);
  91   bool CalledOnValidThread() const;
  92
  93   const int routing_id_;
  94   bool registered_;
  95
  96   gfx::Transform cached_hw_transform_;
  97   gfx::Rect cached_hw_viewport_;
  98   gfx::Rect cached_hw_clip_;
  99   gfx::Rect cached_hw_viewport_rect_for_tile_priority_;
 100   gfx::Transform cached_hw_transform_for_tile_priority_;
 101
 102   // Only valid (non-NULL) during a DemandDrawSw() call.
 103   SkCanvas* current_sw_canvas_;
 104
 105   cc::ManagedMemoryPolicy memory_policy_;
 106
 107   cc::OutputSurfaceClient* output_surface_client_;
 108   scoped_ptr<cc::CompositorFrame> frame_holder_;
 109
 110   scoped_refptr<FrameSwapMessageQueue> frame_swap_message_queue_;
 111
 112   SynchronousCompositorExternalBeginFrameSource* begin_frame_source_;
 113
 114   DISALLOW_COPY_AND_ASSIGN(SynchronousCompositorOutputSurface);
 115 };
 116
 117 }  // namespace content
 118
 119 #endif  // CONTENT_BROWSER_ANDROID_IN_PROCESS_SYNCHRONOUS_COMPOSITOR_OUTPUT_SURFACE_H_