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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_PROXY_H_
#define CC_PROXY_H_
#include "base/basictypes.h"
#include "base/logging.h"
#include "base/time.h"
#include "base/memory/scoped_ptr.h"
#include <public/WebCompositorOutputSurface.h>
#include "cc/cc_export.h"
namespace gfx {
class Rect;
class Vector2d;
}
namespace cc {
class Thread;
struct RenderingStats;
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:
Thread* mainThread() const;
bool hasImplThread() const;
Thread* implThread() const;
// Returns 0 if the current thread is neither the main thread nor the impl thread.
Thread* currentThread() const;
// Debug hooks
bool isMainThread() const;
bool isImplThread() const;
bool isMainThreadBlocked() const;
#ifndef NDEBUG
void setMainThreadBlocked(bool);
void setCurrentThreadIsImplThread(bool);
#endif
virtual ~Proxy();
virtual bool compositeAndReadback(void *pixels, const gfx::Rect&) = 0;
virtual void startPageScaleAnimation(gfx::Vector2d targetOffset, bool useAnchor, float scale, base::TimeDelta duration) = 0;
virtual void finishAllRendering() = 0;
virtual bool isStarted() const = 0;
// Attempts to initialize a context to use for rendering. Returns false if the context could not be created.
// The context will not be used and no frames may be produced until initializeRenderer() is called.
virtual bool initializeOutputSurface() = 0;
// Indicates that the compositing surface associated with our context is ready to use.
virtual void setSurfaceReady() = 0;
virtual void setVisible(bool) = 0;
// Attempts to initialize the layer renderer. Returns false if the context isn't usable for compositing.
virtual bool initializeRenderer() = 0;
// Attempts to recreate the context and layer renderer after a context lost. Returns false if the renderer couldn't be
// reinitialized.
virtual bool recreateOutputSurface() = 0;
virtual void renderingStats(RenderingStats*) = 0;
virtual const RendererCapabilities& rendererCapabilities() const = 0;
virtual void setNeedsAnimate() = 0;
virtual void setNeedsCommit() = 0;
virtual void setNeedsRedraw() = 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) = 0;
virtual bool commitRequested() const = 0;
virtual void start() = 0; // Must be called before using the proxy.
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 void acquireLayerTextures() = 0;
// Testing hooks
virtual void loseOutputSurface() = 0;
protected:
explicit Proxy(scoped_ptr<Thread> implThread);
friend class DebugScopedSetImplThread;
friend class DebugScopedSetMainThread;
friend class DebugScopedSetMainThreadBlocked;
private:
DISALLOW_COPY_AND_ASSIGN(Proxy);
scoped_ptr<Thread> m_mainThread;
scoped_ptr<Thread> m_implThread;
#ifndef NDEBUG
bool m_implThreadIsOverridden;
bool m_isMainThreadBlocked;
#endif
};
#ifndef NDEBUG
class DebugScopedSetMainThreadBlocked {
public:
explicit DebugScopedSetMainThreadBlocked(Proxy* proxy)
: m_proxy(proxy)
{
DCHECK(!m_proxy->isMainThreadBlocked());
m_proxy->setMainThreadBlocked(true);
}
~DebugScopedSetMainThreadBlocked()
{
DCHECK(m_proxy->isMainThreadBlocked());
m_proxy->setMainThreadBlocked(false);
}
private:
Proxy* m_proxy;
};
#else
class DebugScopedSetMainThreadBlocked {
public:
explicit DebugScopedSetMainThreadBlocked(Proxy*) { }
~DebugScopedSetMainThreadBlocked() { }
};
#endif
}
#endif // CC_PROXY_H_
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