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/*
* Copyright (C) 2011 Apple Inc. All rights reserved.
* Copyright (C) 2013 Nokia Corporation and/or its subsidiary(-ies).
*
* 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.
*/
#pragma once
#include "DrawingArea.h"
#include <wtf/RunLoop.h>
namespace WebKit {
class LayerTreeHost;
class AcceleratedDrawingArea : public DrawingArea {
public:
AcceleratedDrawingArea(WebPage&, const WebPageCreationParameters&);
virtual ~AcceleratedDrawingArea();
protected:
// DrawingArea
void setNeedsDisplay() override;
void setNeedsDisplayInRect(const WebCore::IntRect&) override;
void scroll(const WebCore::IntRect& scrollRect, const WebCore::IntSize& scrollDelta) override;
void pageBackgroundTransparencyChanged() override;
void setLayerTreeStateIsFrozen(bool) override;
bool layerTreeStateIsFrozen() const override { return m_layerTreeStateIsFrozen; }
LayerTreeHost* layerTreeHost() const override { return m_layerTreeHost.get(); }
void forceRepaint() override;
bool forceRepaintAsync(uint64_t callbackID) override;
void setPaintingEnabled(bool) override;
void updatePreferences(const WebPreferencesStore&) override;
void mainFrameContentSizeChanged(const WebCore::IntSize&) override;
WebCore::GraphicsLayerFactory* graphicsLayerFactory() override;
void setRootCompositingLayer(WebCore::GraphicsLayer*) override;
void scheduleCompositingLayerFlush() override;
void scheduleCompositingLayerFlushImmediately() override;
#if USE(TEXTURE_MAPPER_GL) && PLATFORM(GTK) && PLATFORM(X11) && !USE(REDIRECTED_XCOMPOSITE_WINDOW)
void setNativeSurfaceHandleForCompositing(uint64_t) override;
void destroyNativeSurfaceHandleForCompositing(bool&) override;
#endif
void activityStateDidChange(WebCore::ActivityState::Flags, bool /* wantsDidUpdateActivityState */, const Vector<uint64_t>& /* callbackIDs */) override;
void attachViewOverlayGraphicsLayer(WebCore::Frame*, WebCore::GraphicsLayer*) override;
void layerHostDidFlushLayers() override;
#if USE(COORDINATED_GRAPHICS_THREADED)
void didChangeViewportAttributes(WebCore::ViewportAttributes&&) override;
#endif
#if USE(COORDINATED_GRAPHICS) || USE(TEXTURE_MAPPER)
void deviceOrPageScaleFactorChanged() override;
#endif
// IPC message handlers.
void updateBackingStoreState(uint64_t backingStoreStateID, bool respondImmediately, float deviceScaleFactor, const WebCore::IntSize&, const WebCore::IntSize& scrollOffset) override;
void exitAcceleratedCompositingModeSoon();
bool exitAcceleratedCompositingModePending() const { return m_exitCompositingTimer.isActive(); }
void exitAcceleratedCompositingModeNow();
void discardPreviousLayerTreeHost();
virtual void suspendPainting();
virtual void resumePainting();
virtual void sendDidUpdateBackingStoreState();
virtual void didUpdateBackingStoreState() { }
virtual void enterAcceleratedCompositingMode(WebCore::GraphicsLayer*);
virtual void exitAcceleratedCompositingMode() { }
uint64_t m_backingStoreStateID { 0 };
// Whether painting is enabled. If painting is disabled, any calls to setNeedsDisplay and scroll are ignored.
bool m_isPaintingEnabled { true };
// Whether we're currently processing an UpdateBackingStoreState message.
bool m_inUpdateBackingStoreState { false };
// When true, we should send an UpdateBackingStoreState message instead of any other messages
// we normally send to the UI process.
bool m_shouldSendDidUpdateBackingStoreState { false };
// True between sending the 'enter compositing' messages, and the 'exit compositing' message.
bool m_compositingAccordingToProxyMessages { false };
// When true, we maintain the layer tree in its current state by not leaving accelerated compositing mode
// and not scheduling layer flushes.
bool m_layerTreeStateIsFrozen { false };
// True when we were asked to exit accelerated compositing mode but couldn't because layer tree
// state was frozen.
bool m_wantsToExitAcceleratedCompositingMode { false };
// Whether painting is suspended. We'll still keep track of the dirty region but we
// won't paint until painting has resumed again.
bool m_isPaintingSuspended { false };
RunLoop::Timer<AcceleratedDrawingArea> m_exitCompositingTimer;
// The layer tree host that handles accelerated compositing.
RefPtr<LayerTreeHost> m_layerTreeHost;
RefPtr<LayerTreeHost> m_previousLayerTreeHost;
RunLoop::Timer<AcceleratedDrawingArea> m_discardPreviousLayerTreeHostTimer;
};
} // namespace WebKit
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