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/*
* Copyright (C) 2011 Apple Inc. All rights reserved.
* Copyright (C) 2013 Nokia Corporation and/or its subsidiary(-ies).
* Copyright (C) 2016-2019 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 "BackingStore.h"
#include "DrawingAreaProxy.h"
#include "LayerTreeContext.h"
#include <wtf/RunLoop.h>
namespace WebCore {
class Region;
}
namespace WebKit {
class DrawingAreaProxyCoordinatedGraphics final : public DrawingAreaProxy {
public:
DrawingAreaProxyCoordinatedGraphics(WebPageProxy&, WebProcessProxy&);
virtual ~DrawingAreaProxyCoordinatedGraphics();
#if !PLATFORM(WPE)
void paint(BackingStore::PlatformGraphicsContext, const WebCore::IntRect&, WebCore::Region& unpaintedRegion);
#endif
bool isInAcceleratedCompositingMode() const { return !m_layerTreeContext.isEmpty(); }
const LayerTreeContext& layerTreeContext() const { return m_layerTreeContext; }
private:
// DrawingAreaProxy
void sizeDidChange() override;
void deviceScaleFactorDidChange() override;
void waitForBackingStoreUpdateOnNextPaint() override;
void setBackingStoreIsDiscardable(bool) override;
#if PLATFORM(GTK)
void adjustTransientZoom(double scale, WebCore::FloatPoint origin) override;
void commitTransientZoom(double scale, WebCore::FloatPoint origin) override;
#endif
// IPC message handlers
void update(uint64_t backingStoreStateID, const UpdateInfo&) override;
void didUpdateBackingStoreState(uint64_t backingStoreStateID, const UpdateInfo&, const LayerTreeContext&) override;
void enterAcceleratedCompositingMode(uint64_t backingStoreStateID, const LayerTreeContext&) override;
void exitAcceleratedCompositingMode(uint64_t backingStoreStateID, const UpdateInfo&) override;
void updateAcceleratedCompositingMode(uint64_t backingStoreStateID, const LayerTreeContext&) override;
void targetRefreshRateDidChange(unsigned) override;
#if !PLATFORM(WPE)
void incorporateUpdate(const UpdateInfo&);
#endif
bool alwaysUseCompositing() const;
void enterAcceleratedCompositingMode(const LayerTreeContext&);
void exitAcceleratedCompositingMode();
void updateAcceleratedCompositingMode(const LayerTreeContext&);
enum RespondImmediatelyOrNot { DoNotRespondImmediately, RespondImmediately };
void backingStoreStateDidChange(RespondImmediatelyOrNot);
void sendUpdateBackingStoreState(RespondImmediatelyOrNot);
void waitForAndDispatchDidUpdateBackingStoreState();
#if !PLATFORM(WPE)
void discardBackingStoreSoon();
void discardBackingStore();
#endif
void dispatchAfterEnsuringDrawing(WTF::Function<void(CallbackBase::Error)>&&) override;
class DrawingMonitor {
WTF_MAKE_NONCOPYABLE(DrawingMonitor); WTF_MAKE_FAST_ALLOCATED;
public:
DrawingMonitor(WebPageProxy&);
~DrawingMonitor();
void start(WTF::Function<void(CallbackBase::Error)>&&);
private:
static int webViewDrawCallback(DrawingMonitor*);
void stop();
void didDraw();
MonotonicTime m_startTime;
WTF::Function<void(CallbackBase::Error)> m_callback;
RunLoop::Timer<DrawingMonitor> m_timer;
#if PLATFORM(GTK)
WebPageProxy& m_webPage;
#endif
};
// The state ID corresponding to our current backing store. Updated whenever we allocate
// a new backing store. Any messages received that correspond to an earlier state are ignored,
// as they don't apply to our current backing store.
uint64_t m_currentBackingStoreStateID { 0 };
// The next backing store state ID we will request the web process update to. Incremented
// whenever our state changes in a way that will require a new backing store to be allocated.
uint64_t m_nextBackingStoreStateID { 0 };
// The current layer tree context.
LayerTreeContext m_layerTreeContext;
// Whether we've sent a UpdateBackingStoreState message and are now waiting for a DidUpdateBackingStoreState message.
// Used to throttle UpdateBackingStoreState messages so we don't send them faster than the Web process can handle.
bool m_isWaitingForDidUpdateBackingStoreState { false };
// For a new Drawing Area don't draw anything until the WebProcess has sent over the first content.
bool m_hasReceivedFirstUpdate { false };
#if !PLATFORM(WPE)
bool m_isBackingStoreDiscardable { true };
std::unique_ptr<BackingStore> m_backingStore;
RunLoop::Timer<DrawingAreaProxyCoordinatedGraphics> m_discardBackingStoreTimer;
#endif
std::unique_ptr<DrawingMonitor> m_drawingMonitor;
};
} // namespace WebKit
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