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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 CCProxy_h
#define CCProxy_h
#include "base/basictypes.h"
#include "base/logging.h"
#include "base/time.h"
#include <public/WebCompositorOutputSurface.h>
namespace cc {
class Thread;
class IntRect;
class IntSize;
struct RenderingStats;
struct RendererCapabilities;
// Abstract class responsible for proxying commands from the main-thread side of
// the compositor over to the compositor implementation.
class Proxy {
public:
static void setMainThread(Thread*);
static Thread* mainThread();
static bool hasImplThread();
static void setImplThread(Thread*);
static Thread* implThread();
// Returns 0 if the current thread is neither the main thread nor the impl thread.
static Thread* currentThread();
virtual ~Proxy();
virtual bool compositeAndReadback(void *pixels, const IntRect&) = 0;
virtual void startPageScaleAnimation(const IntSize& targetPosition, 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 initializeContext() = 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 recreateContext() = 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 void didAddAnimation() = 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;
// Debug hooks
static bool isMainThread();
static bool isImplThread();
static bool isMainThreadBlocked();
#ifndef NDEBUG
static void setMainThreadBlocked(bool);
#endif
// Testing hooks
virtual void loseContext() = 0;
#ifndef NDEBUG
static void setCurrentThreadIsImplThread(bool);
#endif
protected:
Proxy();
friend class DebugScopedSetImplThread;
friend class DebugScopedSetMainThreadBlocked;
private:
DISALLOW_COPY_AND_ASSIGN(Proxy);
};
class DebugScopedSetMainThreadBlocked {
public:
DebugScopedSetMainThreadBlocked()
{
#ifndef NDEBUG
DCHECK(!Proxy::isMainThreadBlocked());
Proxy::setMainThreadBlocked(true);
#endif
}
~DebugScopedSetMainThreadBlocked()
{
#ifndef NDEBUG
DCHECK(Proxy::isMainThreadBlocked());
Proxy::setMainThreadBlocked(false);
#endif
}
};
}
#endif
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