cc/trees/proxy.h

   1 // Copyright 2011 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 CC_TREES_PROXY_H_
   6 #define CC_TREES_PROXY_H_
   7
   8 #include <string>
   9
  10 #include "base/basictypes.h"
  11 #include "base/logging.h"
  12 #include "base/memory/ref_counted.h"
  13 #include "base/memory/scoped_ptr.h"
  14 #include "base/time/time.h"
  15 #include "base/values.h"
  16 #include "cc/base/cc_export.h"
  17
  18 namespace base { class SingleThreadTaskRunner; }
  19
  20 namespace gfx {
  21 class Rect;
  22 class Vector2d;
  23 }
  24
  25 namespace cc {
  26
  27 class OutputSurface;
  28 struct RendererCapabilities;
  29
  30 // Abstract class responsible for proxying commands from the main-thread side of
  31 // the compositor over to the compositor implementation.
  32 class CC_EXPORT Proxy {
  33  public:
  34   base::SingleThreadTaskRunner* MainThreadTaskRunner() const;
  35   bool HasImplThread() const;
  36   base::SingleThreadTaskRunner* ImplThreadTaskRunner() const;
  37
  38   // Debug hooks.
  39   bool IsMainThread() const;
  40   bool IsImplThread() const;
  41   bool IsMainThreadBlocked() const;
  42 #ifndef NDEBUG
  43   void SetMainThreadBlocked(bool is_main_thread_blocked);
  44   void SetCurrentThreadIsImplThread(bool is_impl_thread);
  45 #endif
  46
  47   virtual ~Proxy();
  48
  49   virtual bool CompositeAndReadback(void* pixels, const gfx::Rect& rect) = 0;
  50
  51   virtual void FinishAllRendering() = 0;
  52
  53   virtual bool IsStarted() const = 0;
  54
  55   // Indicates that the compositing surface associated with our context is
  56   // ready to use.
  57   virtual void SetLayerTreeHostClientReady() = 0;
  58
  59   virtual void SetVisible(bool visible) = 0;
  60
  61   // Attempts to recreate the context and renderer synchronously after the
  62   // output surface is lost. Calls
  63   // LayerTreeHost::OnCreateAndInitializeOutputSurfaceAttempted with the result.
  64   virtual void CreateAndInitializeOutputSurface() = 0;
  65
  66   virtual const RendererCapabilities& GetRendererCapabilities() const = 0;
  67
  68   virtual void SetNeedsAnimate() = 0;
  69   virtual void SetNeedsUpdateLayers() = 0;
  70   virtual void SetNeedsCommit() = 0;
  71   virtual void SetNeedsRedraw(const gfx::Rect& damage_rect) = 0;
  72   virtual void SetNextCommitWaitsForActivation() = 0;
  73
  74   virtual void NotifyInputThrottledUntilCommit() = 0;
  75
  76   // Defers commits until it is reset. It is only supported when in threaded
  77   // mode. It's an error to make a sync call like CompositeAndReadback while
  78   // commits are deferred.
  79   virtual void SetDeferCommits(bool defer_commits) = 0;
  80
  81   virtual void MainThreadHasStoppedFlinging() = 0;
  82
  83   virtual bool CommitRequested() const = 0;
  84   virtual bool BeginMainFrameRequested() const = 0;
  85
  86   // Must be called before using the proxy.
  87   virtual void Start() = 0;
  88   virtual void Stop() = 0;   // Must be called before deleting the proxy.
  89
  90   // Forces 3D commands on all contexts to wait for all previous SwapBuffers
  91   // to finish before executing in the GPU process.
  92   virtual void ForceSerializeOnSwapBuffers() = 0;
  93
  94   // Maximum number of sub-region texture updates supported for each commit.
  95   virtual size_t MaxPartialTextureUpdates() const = 0;
  96
  97   virtual void AcquireLayerTextures() = 0;
  98
  99   virtual scoped_ptr<base::Value> AsValue() const = 0;
 100
 101   // Testing hooks
 102   virtual bool CommitPendingForTesting() = 0;
 103   virtual scoped_ptr<base::Value> SchedulerStateAsValueForTesting();
 104
 105  protected:
 106   explicit Proxy(
 107       scoped_refptr<base::SingleThreadTaskRunner> impl_task_runner);
 108   friend class DebugScopedSetImplThread;
 109   friend class DebugScopedSetMainThread;
 110   friend class DebugScopedSetMainThreadBlocked;
 111
 112  private:
 113   scoped_refptr<base::SingleThreadTaskRunner> main_task_runner_;
 114   scoped_refptr<base::SingleThreadTaskRunner> impl_task_runner_;
 115 #ifndef NDEBUG
 116   bool impl_thread_is_overridden_;
 117   bool is_main_thread_blocked_;
 118 #endif
 119
 120   DISALLOW_COPY_AND_ASSIGN(Proxy);
 121 };
 122
 123 #ifndef NDEBUG
 124 class DebugScopedSetMainThreadBlocked {
 125  public:
 126   explicit DebugScopedSetMainThreadBlocked(Proxy* proxy) : proxy_(proxy) {
 127     DCHECK(!proxy_->IsMainThreadBlocked());
 128     proxy_->SetMainThreadBlocked(true);
 129   }
 130   ~DebugScopedSetMainThreadBlocked() {
 131     DCHECK(proxy_->IsMainThreadBlocked());
 132     proxy_->SetMainThreadBlocked(false);
 133   }
 134  private:
 135   Proxy* proxy_;
 136   DISALLOW_COPY_AND_ASSIGN(DebugScopedSetMainThreadBlocked);
 137 };
 138 #else
 139 class DebugScopedSetMainThreadBlocked {
 140  public:
 141   explicit DebugScopedSetMainThreadBlocked(Proxy* proxy) {}
 142   ~DebugScopedSetMainThreadBlocked() {}
 143  private:
 144   DISALLOW_COPY_AND_ASSIGN(DebugScopedSetMainThreadBlocked);
 145 };
 146 #endif
 147
 148 }  // namespace cc
 149
 150 #endif  // CC_TREES_PROXY_H_