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/*
* Copyright (C) 2011 Apple Inc. All rights reserved.
* Copyright (C) 2013 Nokia Corporation and/or its subsidiary(-ies).
* Copyright (C) 2019 Igalia S.L.
*
* 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 <WebCore/Region.h>
#include <wtf/RunLoop.h>
namespace WebCore {
class GraphicsContext;
}
namespace WebKit {
class ShareableBitmap;
class UpdateInfo;
class DrawingAreaCoordinatedGraphics final : public DrawingArea {
public:
DrawingAreaCoordinatedGraphics(WebPage&, const WebPageCreationParameters&);
virtual ~DrawingAreaCoordinatedGraphics();
private:
// DrawingArea
void setNeedsDisplay() override;
void setNeedsDisplayInRect(const WebCore::IntRect&) override;
void scroll(const WebCore::IntRect& scrollRect, const WebCore::IntSize& scrollDelta) override;
void forceRepaint() override;
void forceRepaintAsync(WebPage&, CompletionHandler<void()>&&) override;
void setLayerTreeStateIsFrozen(bool) override;
bool layerTreeStateIsFrozen() const override { return m_layerTreeStateIsFrozen; }
void updatePreferences(const WebPreferencesStore&) override;
void enablePainting() override;
void mainFrameContentSizeChanged(const WebCore::IntSize&) override;
#if USE(COORDINATED_GRAPHICS) || USE(TEXTURE_MAPPER)
void deviceOrPageScaleFactorChanged() override;
void didChangeViewportAttributes(WebCore::ViewportAttributes&&) override;
#endif
bool supportsAsyncScrolling() const override;
WebCore::GraphicsLayerFactory* graphicsLayerFactory() override;
void setRootCompositingLayer(WebCore::GraphicsLayer*) override;
void triggerRenderingUpdate() override;
#if USE(COORDINATED_GRAPHICS) || USE(GRAPHICS_LAYER_TEXTURE_MAPPER)
void layerHostDidFlushLayers() override;
#endif
RefPtr<WebCore::DisplayRefreshMonitor> createDisplayRefreshMonitor(WebCore::PlatformDisplayID) override;
void activityStateDidChange(OptionSet<WebCore::ActivityState::Flag>, ActivityStateChangeID, CompletionHandler<void()>&&) override;
void attachViewOverlayGraphicsLayer(WebCore::GraphicsLayer*) override;
// IPC message handlers.
void updateBackingStoreState(uint64_t backingStoreStateID, bool respondImmediately, float deviceScaleFactor, const WebCore::IntSize&, const WebCore::IntSize& scrollOffset) override;
void targetRefreshRateDidChange(unsigned rate) override;
void didUpdate() override;
#if PLATFORM(GTK)
void adjustTransientZoom(double scale, WebCore::FloatPoint origin) override;
void commitTransientZoom(double scale, WebCore::FloatPoint origin) override;
#endif
void sendDidUpdateBackingStoreState();
void exitAcceleratedCompositingModeSoon();
bool exitAcceleratedCompositingModePending() const { return m_exitCompositingTimer.isActive(); }
void discardPreviousLayerTreeHost();
void suspendPainting();
void resumePainting();
void enterAcceleratedCompositingMode(WebCore::GraphicsLayer*);
void exitAcceleratedCompositingMode();
void scheduleDisplay();
void displayTimerFired();
void display();
void display(UpdateInfo&);
uint64_t m_backingStoreStateID { 0 };
// Whether painting is enabled. If painting is disabled, any calls to setNeedsDisplay and scroll are ignored.
bool m_isPaintingEnabled { false };
// 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<DrawingAreaCoordinatedGraphics> m_exitCompositingTimer;
// The layer tree host that handles accelerated compositing.
std::unique_ptr<LayerTreeHost> m_layerTreeHost;
std::unique_ptr<LayerTreeHost> m_previousLayerTreeHost;
RunLoop::Timer<DrawingAreaCoordinatedGraphics> m_discardPreviousLayerTreeHostTimer;
WebCore::Region m_dirtyRegion;
WebCore::IntRect m_scrollRect;
WebCore::IntSize m_scrollOffset;
// 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 { false };
bool m_scheduledWhileWaitingForDidUpdate { false };
bool m_alwaysUseCompositing { false };
bool m_supportsAsyncScrolling { true };
bool m_forceRepaintAfterBackingStoreStateUpdate { false };
RunLoop::Timer<DrawingAreaCoordinatedGraphics> m_displayTimer;
#if PLATFORM(GTK)
bool m_transientZoom { false };
WebCore::FloatPoint m_transientZoomInitialOrigin;
#endif
};
} // namespace WebKit
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