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// Copyright 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CC_TREES_SINGLE_THREAD_PROXY_H_
#define CC_TREES_SINGLE_THREAD_PROXY_H_
#include <limits>
#include "base/time/time.h"
#include "cc/animation/animation_events.h"
#include "cc/output/begin_frame_args.h"
#include "cc/trees/layer_tree_host_impl.h"
#include "cc/trees/proxy.h"
namespace cc {
class ContextProvider;
class LayerTreeHost;
class SingleThreadProxy : public Proxy, LayerTreeHostImplClient {
public:
static scoped_ptr<Proxy> Create(LayerTreeHost* layer_tree_host);
virtual ~SingleThreadProxy();
// Proxy implementation
virtual bool CompositeAndReadback(void* pixels, gfx::Rect rect) OVERRIDE;
virtual void FinishAllRendering() OVERRIDE;
virtual bool IsStarted() const OVERRIDE;
virtual void SetLayerTreeHostClientReady() OVERRIDE;
virtual void SetVisible(bool visible) OVERRIDE;
virtual void CreateAndInitializeOutputSurface() OVERRIDE;
virtual const RendererCapabilities& GetRendererCapabilities() const OVERRIDE;
virtual void SetNeedsAnimate() OVERRIDE;
virtual void SetNeedsCommit() OVERRIDE;
virtual void SetNeedsRedraw(gfx::Rect damage_rect) OVERRIDE;
virtual void SetDeferCommits(bool defer_commits) OVERRIDE;
virtual bool CommitRequested() const OVERRIDE;
virtual void MainThreadHasStoppedFlinging() OVERRIDE {}
virtual void Start(scoped_ptr<OutputSurface> first_output_surface) OVERRIDE;
virtual void Stop() OVERRIDE;
virtual size_t MaxPartialTextureUpdates() const OVERRIDE;
virtual void AcquireLayerTextures() OVERRIDE {}
virtual void ForceSerializeOnSwapBuffers() OVERRIDE;
virtual skia::RefPtr<SkPicture> CapturePicture() OVERRIDE;
virtual scoped_ptr<base::Value> AsValue() const OVERRIDE;
virtual bool CommitPendingForTesting() OVERRIDE;
// LayerTreeHostImplClient implementation
virtual void DidTryInitializeRendererOnImplThread(
bool success,
scoped_refptr<ContextProvider> offscreen_context_provider) OVERRIDE;
virtual void DidLoseOutputSurfaceOnImplThread() OVERRIDE;
virtual void OnSwapBuffersCompleteOnImplThread() OVERRIDE {}
virtual void BeginFrameOnImplThread(const BeginFrameArgs& args)
OVERRIDE {}
virtual void OnCanDrawStateChanged(bool can_draw) OVERRIDE;
virtual void OnHasPendingTreeStateChanged(bool have_pending_tree) OVERRIDE;
virtual void SetNeedsRedrawOnImplThread() OVERRIDE;
virtual void SetNeedsRedrawRectOnImplThread(gfx::Rect dirty_rect) OVERRIDE;
virtual void DidInitializeVisibleTileOnImplThread() OVERRIDE;
virtual void SetNeedsCommitOnImplThread() OVERRIDE;
virtual void PostAnimationEventsToMainThreadOnImplThread(
scoped_ptr<AnimationEventsVector> events,
base::Time wall_clock_time) OVERRIDE;
virtual bool ReduceContentsTextureMemoryOnImplThread(
size_t limit_bytes,
int priority_cutoff) OVERRIDE;
virtual void ReduceWastedContentsTextureMemoryOnImplThread() OVERRIDE;
virtual void SendManagedMemoryStats() OVERRIDE;
virtual bool IsInsideDraw() OVERRIDE;
virtual void RenewTreePriority() OVERRIDE {}
virtual void RequestScrollbarAnimationOnImplThread(base::TimeDelta delay)
OVERRIDE {}
virtual void DidActivatePendingTree() OVERRIDE {}
// Called by the legacy path where RenderWidget does the scheduling.
void CompositeImmediately(base::TimeTicks frame_begin_time);
private:
explicit SingleThreadProxy(LayerTreeHost* layer_tree_host);
void OnOutputSurfaceInitializeAttempted(bool success);
bool CommitAndComposite(base::TimeTicks frame_begin_time,
gfx::Rect device_viewport_damage_rect,
bool for_readback,
LayerTreeHostImpl::FrameData* frame);
void DoCommit(scoped_ptr<ResourceUpdateQueue> queue);
bool DoComposite(
scoped_refptr<cc::ContextProvider> offscreen_context_provider,
base::TimeTicks frame_begin_time,
gfx::Rect device_viewport_damage_rect,
bool for_readback,
LayerTreeHostImpl::FrameData* frame);
void DidSwapFrame();
bool ShouldComposite() const;
// Accessed on main thread only.
LayerTreeHost* layer_tree_host_;
bool created_offscreen_context_provider_;
// Holds the first output surface passed from Start. Should not be used for
// anything else.
scoped_ptr<OutputSurface> first_output_surface_;
// Used on the Thread, but checked on main thread during
// initialization/shutdown.
scoped_ptr<LayerTreeHostImpl> layer_tree_host_impl_;
RendererCapabilities renderer_capabilities_for_main_thread_;
bool next_frame_is_newly_committed_frame_;
bool inside_draw_;
DISALLOW_COPY_AND_ASSIGN(SingleThreadProxy);
};
// For use in the single-threaded case. In debug builds, it pretends that the
// code is running on the impl thread to satisfy assertion checks.
class DebugScopedSetImplThread {
public:
explicit DebugScopedSetImplThread(Proxy* proxy) : proxy_(proxy) {
#ifndef NDEBUG
previous_value_ = proxy_->impl_thread_is_overridden_;
proxy_->SetCurrentThreadIsImplThread(true);
#endif
}
~DebugScopedSetImplThread() {
#ifndef NDEBUG
proxy_->SetCurrentThreadIsImplThread(previous_value_);
#endif
}
private:
bool previous_value_;
Proxy* proxy_;
DISALLOW_COPY_AND_ASSIGN(DebugScopedSetImplThread);
};
// For use in the single-threaded case. In debug builds, it pretends that the
// code is running on the main thread to satisfy assertion checks.
class DebugScopedSetMainThread {
public:
explicit DebugScopedSetMainThread(Proxy* proxy) : proxy_(proxy) {
#ifndef NDEBUG
previous_value_ = proxy_->impl_thread_is_overridden_;
proxy_->SetCurrentThreadIsImplThread(false);
#endif
}
~DebugScopedSetMainThread() {
#ifndef NDEBUG
proxy_->SetCurrentThreadIsImplThread(previous_value_);
#endif
}
private:
bool previous_value_;
Proxy* proxy_;
DISALLOW_COPY_AND_ASSIGN(DebugScopedSetMainThread);
};
// For use in the single-threaded case. In debug builds, it pretends that the
// code is running on the impl thread and that the main thread is blocked to
// satisfy assertion checks
class DebugScopedSetImplThreadAndMainThreadBlocked {
public:
explicit DebugScopedSetImplThreadAndMainThreadBlocked(Proxy* proxy)
: impl_thread_(proxy), main_thread_blocked_(proxy) {}
private:
DebugScopedSetImplThread impl_thread_;
DebugScopedSetMainThreadBlocked main_thread_blocked_;
DISALLOW_COPY_AND_ASSIGN(DebugScopedSetImplThreadAndMainThreadBlocked);
};
} // namespace cc
#endif // CC_TREES_SINGLE_THREAD_PROXY_H_