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/threading/platform_thread.h"
  15 #include "base/time/time.h"
  16 #include "base/values.h"
  17 #include "cc/base/cc_export.h"
  18
  19 namespace base {
  20 namespace debug {
  21 class TracedValue;
  22 }
  23 class SingleThreadTaskRunner;
  24 }
  25
  26 namespace gfx {
  27 class Rect;
  28 class Vector2d;
  29 }
  30
  31 namespace cc {
  32 class BlockingTaskRunner;
  33 class LayerTreeDebugState;
  34 class OutputSurface;
  35 struct RendererCapabilities;
  36
  37 // Abstract class responsible for proxying commands from the main-thread side of
  38 // the compositor over to the compositor implementation.
  39 class CC_EXPORT Proxy {
  40  public:
  41   base::SingleThreadTaskRunner* MainThreadTaskRunner() const;
  42   bool HasImplThread() const;
  43   base::SingleThreadTaskRunner* ImplThreadTaskRunner() const;
  44
  45   // Debug hooks.
  46   bool IsMainThread() const;
  47   bool IsImplThread() const;
  48   bool IsMainThreadBlocked() const;
  49 #if DCHECK_IS_ON
  50   void SetMainThreadBlocked(bool is_main_thread_blocked);
  51   void SetCurrentThreadIsImplThread(bool is_impl_thread);
  52 #endif
  53
  54   virtual ~Proxy();
  55
  56   virtual void FinishAllRendering() = 0;
  57
  58   virtual bool IsStarted() const = 0;
  59
  60   // Indicates that the compositing surface associated with our context is
  61   // ready to use.
  62   virtual void SetLayerTreeHostClientReady() = 0;
  63
  64   virtual void SetVisible(bool visible) = 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 bool SupportsImplScrolling() const = 0;
  98
  99   virtual void AsValueInto(base::debug::TracedValue* value) const = 0;
 100
 101   virtual void SetDebugState(const LayerTreeDebugState& debug_state) = 0;
 102
 103   // Testing hooks
 104   virtual bool MainFrameWillHappenForTesting() = 0;
 105
 106   BlockingTaskRunner* blocking_main_thread_task_runner() const {
 107     return blocking_main_thread_task_runner_.get();
 108   }
 109
 110  protected:
 111   Proxy(scoped_refptr<base::SingleThreadTaskRunner> main_task_runner,
 112         scoped_refptr<base::SingleThreadTaskRunner> impl_task_runner);
 113   friend class DebugScopedSetImplThread;
 114   friend class DebugScopedSetMainThread;
 115   friend class DebugScopedSetMainThreadBlocked;
 116
 117  private:
 118   scoped_refptr<base::SingleThreadTaskRunner> main_task_runner_;
 119   scoped_refptr<base::SingleThreadTaskRunner> impl_task_runner_;
 120   scoped_ptr<BlockingTaskRunner> blocking_main_thread_task_runner_;
 121
 122 #if DCHECK_IS_ON
 123   const base::PlatformThreadId main_thread_id_;
 124   bool impl_thread_is_overridden_;
 125   bool is_main_thread_blocked_;
 126 #endif
 127
 128   DISALLOW_COPY_AND_ASSIGN(Proxy);
 129 };
 130
 131 #if DCHECK_IS_ON
 132 class DebugScopedSetMainThreadBlocked {
 133  public:
 134   explicit DebugScopedSetMainThreadBlocked(Proxy* proxy) : proxy_(proxy) {
 135     DCHECK(!proxy_->IsMainThreadBlocked());
 136     proxy_->SetMainThreadBlocked(true);
 137   }
 138   ~DebugScopedSetMainThreadBlocked() {
 139     DCHECK(proxy_->IsMainThreadBlocked());
 140     proxy_->SetMainThreadBlocked(false);
 141   }
 142  private:
 143   Proxy* proxy_;
 144   DISALLOW_COPY_AND_ASSIGN(DebugScopedSetMainThreadBlocked);
 145 };
 146 #else
 147 class DebugScopedSetMainThreadBlocked {
 148  public:
 149   explicit DebugScopedSetMainThreadBlocked(Proxy* proxy) {}
 150   ~DebugScopedSetMainThreadBlocked() {}
 151  private:
 152   DISALLOW_COPY_AND_ASSIGN(DebugScopedSetMainThreadBlocked);
 153 };
 154 #endif
 155
 156 }  // namespace cc
 157
 158 #endif  // CC_TREES_PROXY_H_