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/*
* Copyright (C) 2011 Apple 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 DrawingAreaImpl_h
#define DrawingAreaImpl_h
#include "DrawingArea.h"
#include "LayerTreeHost.h"
#include <WebCore/Region.h>
#include <wtf/RunLoop.h>
namespace WebCore {
class GraphicsContext;
}
namespace WebKit {
class ShareableBitmap;
class UpdateInfo;
class DrawingAreaImpl : public DrawingArea {
public:
DrawingAreaImpl(WebPage&, const WebPageCreationParameters&);
virtual ~DrawingAreaImpl();
void layerHostDidFlushLayers();
private:
// DrawingArea
virtual void setNeedsDisplay() override;
virtual void setNeedsDisplayInRect(const WebCore::IntRect&) override;
virtual void scroll(const WebCore::IntRect& scrollRect, const WebCore::IntSize& scrollDelta) override;
virtual void pageBackgroundTransparencyChanged() override;
virtual void setLayerTreeStateIsFrozen(bool) override;
virtual bool layerTreeStateIsFrozen() const override { return m_layerTreeStateIsFrozen; }
virtual LayerTreeHost* layerTreeHost() const override { return m_layerTreeHost.get(); }
virtual void forceRepaint() override;
virtual bool forceRepaintAsync(uint64_t callbackID) override;
virtual void setPaintingEnabled(bool) override;
virtual void mainFrameContentSizeChanged(const WebCore::IntSize&) override;
virtual void updatePreferences(const WebPreferencesStore&) override;
virtual WebCore::GraphicsLayerFactory* graphicsLayerFactory() override;
virtual void setRootCompositingLayer(WebCore::GraphicsLayer*) override;
virtual void scheduleCompositingLayerFlush() override;
virtual void scheduleCompositingLayerFlushImmediately() override;
virtual void attachViewOverlayGraphicsLayer(WebCore::Frame*, WebCore::GraphicsLayer*) override;
#if USE(TEXTURE_MAPPER) && PLATFORM(GTK)
virtual void setNativeSurfaceHandleForCompositing(uint64_t) override;
virtual void destroyNativeSurfaceHandleForCompositing(bool&) override;
#endif
// IPC message handlers.
virtual void updateBackingStoreState(uint64_t backingStoreStateID, bool respondImmediately, float deviceScaleFactor, const WebCore::IntSize&, const WebCore::IntSize& scrollOffset) override;
virtual void didUpdate() override;
virtual void suspendPainting();
virtual void resumePainting();
void sendDidUpdateBackingStoreState();
void enterAcceleratedCompositingMode(WebCore::GraphicsLayer*);
void exitAcceleratedCompositingModeSoon();
bool exitAcceleratedCompositingModePending() const { return m_exitCompositingTimer.isActive(); }
void exitAcceleratedCompositingMode();
void scheduleDisplay();
void displayTimerFired();
void display();
void display(UpdateInfo&);
uint64_t m_backingStoreStateID;
WebCore::Region m_dirtyRegion;
WebCore::IntRect m_scrollRect;
WebCore::IntSize m_scrollOffset;
// Whether painting is enabled. If painting is disabled, any calls to setNeedsDisplay and scroll are ignored.
bool m_isPaintingEnabled;
// Whether we're currently processing an UpdateBackingStoreState message.
bool m_inUpdateBackingStoreState;
// When true, we should send an UpdateBackingStoreState message instead of any other messages
// we normally send to the UI process.
bool m_shouldSendDidUpdateBackingStoreState;
// Whether we're waiting for a DidUpdate message. Used for throttling paints so that the
// web process won't paint more frequent than the UI process can handle.
bool m_isWaitingForDidUpdate;
// True between sending the 'enter compositing' messages, and the 'exit compositing' message.
bool m_compositingAccordingToProxyMessages;
// 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;
// True when we were asked to exit accelerated compositing mode but couldn't because layer tree
// state was frozen.
bool m_wantsToExitAcceleratedCompositingMode;
// 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;
bool m_alwaysUseCompositing;
bool m_forceRepaintAfterBackingStoreStateUpdate { false };
RunLoop::Timer<DrawingAreaImpl> m_displayTimer;
RunLoop::Timer<DrawingAreaImpl> m_exitCompositingTimer;
// The layer tree host that handles accelerated compositing.
RefPtr<LayerTreeHost> m_layerTreeHost;
};
} // namespace WebKit
#endif // DrawingAreaImpl_h
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