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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_PROXY_H_
#define CC_TREES_PROXY_H_
#include <string>
#include "base/basictypes.h"
#include "base/logging.h"
#include "base/memory/ref_counted.h"
#include "base/memory/scoped_ptr.h"
#include "base/threading/platform_thread.h"
#include "base/time/time.h"
#include "base/values.h"
#include "cc/base/cc_export.h"
namespace base {
namespace debug {
class TracedValue;
}
class SingleThreadTaskRunner;
}
namespace gfx {
class Rect;
class Vector2d;
}
namespace cc {
class BlockingTaskRunner;
class LayerTreeDebugState;
class OutputSurface;
struct RendererCapabilities;
// Abstract class responsible for proxying commands from the main-thread side of
// the compositor over to the compositor implementation.
class CC_EXPORT Proxy {
public:
base::SingleThreadTaskRunner* MainThreadTaskRunner() const;
bool HasImplThread() const;
base::SingleThreadTaskRunner* ImplThreadTaskRunner() const;
// Debug hooks.
bool IsMainThread() const;
bool IsImplThread() const;
bool IsMainThreadBlocked() const;
#if DCHECK_IS_ON
void SetMainThreadBlocked(bool is_main_thread_blocked);
void SetCurrentThreadIsImplThread(bool is_impl_thread);
#endif
virtual ~Proxy();
virtual void FinishAllRendering() = 0;
virtual bool IsStarted() const = 0;
// Will call LayerTreeHost::OnCreateAndInitializeOutputSurfaceAttempted
// with the result of this function.
virtual void SetOutputSurface(scoped_ptr<OutputSurface> output_surface) = 0;
// Indicates that the compositing surface associated with our context is
// ready to use.
virtual void SetLayerTreeHostClientReady() = 0;
virtual void SetVisible(bool visible) = 0;
virtual const RendererCapabilities& GetRendererCapabilities() const = 0;
virtual void SetNeedsAnimate() = 0;
virtual void SetNeedsUpdateLayers() = 0;
virtual void SetNeedsCommit() = 0;
virtual void SetNeedsRedraw(const gfx::Rect& damage_rect) = 0;
virtual void SetNextCommitWaitsForActivation() = 0;
virtual void NotifyInputThrottledUntilCommit() = 0;
// Defers commits until it is reset. It is only supported when in threaded
// mode. It's an error to make a sync call like CompositeAndReadback while
// commits are deferred.
virtual void SetDeferCommits(bool defer_commits) = 0;
virtual void MainThreadHasStoppedFlinging() = 0;
virtual bool CommitRequested() const = 0;
virtual bool BeginMainFrameRequested() const = 0;
// Must be called before using the proxy.
virtual void Start() = 0;
virtual void Stop() = 0; // Must be called before deleting the proxy.
// Forces 3D commands on all contexts to wait for all previous SwapBuffers
// to finish before executing in the GPU process.
virtual void ForceSerializeOnSwapBuffers() = 0;
// Maximum number of sub-region texture updates supported for each commit.
virtual size_t MaxPartialTextureUpdates() const = 0;
virtual bool SupportsImplScrolling() const = 0;
virtual void AsValueInto(base::debug::TracedValue* value) const = 0;
virtual void SetDebugState(const LayerTreeDebugState& debug_state) = 0;
// Testing hooks
virtual bool MainFrameWillHappenForTesting() = 0;
BlockingTaskRunner* blocking_main_thread_task_runner() const {
return blocking_main_thread_task_runner_.get();
}
protected:
Proxy(scoped_refptr<base::SingleThreadTaskRunner> main_task_runner,
scoped_refptr<base::SingleThreadTaskRunner> impl_task_runner);
friend class DebugScopedSetImplThread;
friend class DebugScopedSetMainThread;
friend class DebugScopedSetMainThreadBlocked;
private:
scoped_refptr<base::SingleThreadTaskRunner> main_task_runner_;
scoped_refptr<base::SingleThreadTaskRunner> impl_task_runner_;
scoped_ptr<BlockingTaskRunner> blocking_main_thread_task_runner_;
#if DCHECK_IS_ON
const base::PlatformThreadId main_thread_id_;
bool impl_thread_is_overridden_;
bool is_main_thread_blocked_;
#endif
DISALLOW_COPY_AND_ASSIGN(Proxy);
};
#if DCHECK_IS_ON
class DebugScopedSetMainThreadBlocked {
public:
explicit DebugScopedSetMainThreadBlocked(Proxy* proxy) : proxy_(proxy) {
DCHECK(!proxy_->IsMainThreadBlocked());
proxy_->SetMainThreadBlocked(true);
}
~DebugScopedSetMainThreadBlocked() {
DCHECK(proxy_->IsMainThreadBlocked());
proxy_->SetMainThreadBlocked(false);
}
private:
Proxy* proxy_;
DISALLOW_COPY_AND_ASSIGN(DebugScopedSetMainThreadBlocked);
};
#else
class DebugScopedSetMainThreadBlocked {
public:
explicit DebugScopedSetMainThreadBlocked(Proxy* proxy) {}
~DebugScopedSetMainThreadBlocked() {}
private:
DISALLOW_COPY_AND_ASSIGN(DebugScopedSetMainThreadBlocked);
};
#endif
} // namespace cc
#endif // CC_TREES_PROXY_H_
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