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/*
* Copyright (C) 2011 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef CCProxy_h
#define CCProxy_h
#include "IntRect.h"
#include <wtf/Noncopyable.h>
#include <wtf/PassOwnPtr.h>
#include <wtf/PassRefPtr.h>
#include <wtf/Threading.h>
namespace WebCore {
class CCThread;
class CCGraphicsContext;
struct CCRenderingStats;
struct LayerRendererCapabilities;
// Abstract class responsible for proxying commands from the main-thread side of
// the compositor over to the compositor implementation.
class CCProxy {
WTF_MAKE_NONCOPYABLE(CCProxy);
public:
static void setMainThread(CCThread*);
static CCThread* mainThread();
static bool hasImplThread();
static void setImplThread(CCThread*);
static CCThread* implThread();
// Returns 0 if the current thread is neither the main thread nor the impl thread.
static CCThread* currentThread();
virtual ~CCProxy();
virtual bool compositeAndReadback(void *pixels, const IntRect&) = 0;
virtual void startPageScaleAnimation(const IntSize& targetPosition, bool useAnchor, float scale, double durationSec) = 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 initializeLayerRenderer() 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 initializeLayerRenderer() = 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 int compositorIdentifier() const = 0;
virtual void implSideRenderingStats(CCRenderingStats&) = 0;
virtual const LayerRendererCapabilities& layerRendererCapabilities() const = 0;
virtual void setNeedsAnimate() = 0;
virtual void setNeedsCommit() = 0;
virtual void setNeedsRedraw() = 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
#ifndef NDEBUG
static bool isMainThread();
static bool isImplThread();
static bool isMainThreadBlocked();
static void setMainThreadBlocked(bool);
#endif
// Testing hooks
virtual void loseContext() = 0;
#ifndef NDEBUG
static void setCurrentThreadIsImplThread(bool);
#endif
protected:
CCProxy();
friend class DebugScopedSetImplThread;
friend class DebugScopedSetMainThreadBlocked;
};
class DebugScopedSetMainThreadBlocked {
public:
DebugScopedSetMainThreadBlocked()
{
#if !ASSERT_DISABLED
ASSERT(!CCProxy::isMainThreadBlocked());
CCProxy::setMainThreadBlocked(true);
#endif
}
~DebugScopedSetMainThreadBlocked()
{
#if !ASSERT_DISABLED
ASSERT(CCProxy::isMainThreadBlocked());
CCProxy::setMainThreadBlocked(false);
#endif
}
};
}
#endif
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