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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.
*/
#include "config.h"
#if USE(COORDINATED_GRAPHICS)
#include "CoordinatedDrawingAreaProxy.h"
#include "CoordinatedLayerTreeHostProxy.h"
#include "DrawingAreaMessages.h"
#include "DrawingAreaProxyMessages.h"
#include "LayerTreeContext.h"
#include "UpdateInfo.h"
#include "WebPageGroup.h"
#include "WebPageProxy.h"
#include "WebPreferences.h"
#include "WebProcessProxy.h"
#include <WebCore/Region.h>
using namespace WebCore;
namespace WebKit {
CoordinatedDrawingAreaProxy::CoordinatedDrawingAreaProxy(WebPageProxy& webPageProxy)
: DrawingAreaProxy(DrawingAreaTypeCoordinated, webPageProxy)
, m_currentBackingStoreStateID(0)
, m_nextBackingStoreStateID(0)
, m_isWaitingForDidUpdateBackingStoreState(false)
, m_hasReceivedFirstUpdate(false)
{
// Construct the proxy early to allow messages to be sent to the web process while AC is entered there.
m_coordinatedLayerTreeHostProxy = std::make_unique<CoordinatedLayerTreeHostProxy>(this);
}
CoordinatedDrawingAreaProxy::~CoordinatedDrawingAreaProxy()
{
// Make sure to exit accelerated compositing mode.
if (isInAcceleratedCompositingMode())
exitAcceleratedCompositingMode();
}
void CoordinatedDrawingAreaProxy::updateViewport()
{
m_webPageProxy.setViewNeedsDisplay(viewportVisibleRect());
}
WebCore::IntRect CoordinatedDrawingAreaProxy::contentsRect() const
{
return IntRect(IntPoint::zero(), m_webPageProxy.viewSize());
}
void CoordinatedDrawingAreaProxy::sizeDidChange()
{
backingStoreStateDidChange(RespondImmediately);
}
void CoordinatedDrawingAreaProxy::deviceScaleFactorDidChange()
{
backingStoreStateDidChange(RespondImmediately);
}
void CoordinatedDrawingAreaProxy::visibilityDidChange()
{
// If we don't have a backing store, go ahead and mark the backing store as being changed so
// that when paint we'll actually wait for something to paint and not flash white.
if (m_layerTreeContext.isEmpty())
backingStoreStateDidChange(DoNotRespondImmediately);
}
void CoordinatedDrawingAreaProxy::waitForBackingStoreUpdateOnNextPaint()
{
m_hasReceivedFirstUpdate = true;
}
void CoordinatedDrawingAreaProxy::didUpdateBackingStoreState(uint64_t backingStoreStateID, const UpdateInfo& updateInfo, const LayerTreeContext& layerTreeContext)
{
ASSERT_ARG(backingStoreStateID, backingStoreStateID <= m_nextBackingStoreStateID);
ASSERT_ARG(backingStoreStateID, backingStoreStateID > m_currentBackingStoreStateID);
m_currentBackingStoreStateID = backingStoreStateID;
m_isWaitingForDidUpdateBackingStoreState = false;
// Stop the responsiveness timer that was started in sendUpdateBackingStoreState.
m_webPageProxy.process().responsivenessTimer().stop();
if (layerTreeContext != m_layerTreeContext) {
if (!m_layerTreeContext.isEmpty()) {
exitAcceleratedCompositingMode();
ASSERT(m_layerTreeContext.isEmpty());
}
if (!layerTreeContext.isEmpty()) {
enterAcceleratedCompositingMode(layerTreeContext);
ASSERT(layerTreeContext == m_layerTreeContext);
}
}
if (m_nextBackingStoreStateID != m_currentBackingStoreStateID)
sendUpdateBackingStoreState(RespondImmediately);
else
m_hasReceivedFirstUpdate = true;
}
void CoordinatedDrawingAreaProxy::enterAcceleratedCompositingMode(uint64_t backingStoreStateID, const LayerTreeContext& layerTreeContext)
{
ASSERT_ARG(backingStoreStateID, backingStoreStateID <= m_currentBackingStoreStateID);
if (backingStoreStateID < m_currentBackingStoreStateID)
return;
enterAcceleratedCompositingMode(layerTreeContext);
}
void CoordinatedDrawingAreaProxy::exitAcceleratedCompositingMode(uint64_t backingStoreStateID, const UpdateInfo& updateInfo)
{
ASSERT_ARG(backingStoreStateID, backingStoreStateID <= m_currentBackingStoreStateID);
if (backingStoreStateID < m_currentBackingStoreStateID)
return;
exitAcceleratedCompositingMode();
}
void CoordinatedDrawingAreaProxy::updateAcceleratedCompositingMode(uint64_t backingStoreStateID, const LayerTreeContext& layerTreeContext)
{
ASSERT_ARG(backingStoreStateID, backingStoreStateID <= m_currentBackingStoreStateID);
if (backingStoreStateID < m_currentBackingStoreStateID)
return;
updateAcceleratedCompositingMode(layerTreeContext);
}
void CoordinatedDrawingAreaProxy::backingStoreStateDidChange(RespondImmediatelyOrNot respondImmediatelyOrNot)
{
++m_nextBackingStoreStateID;
sendUpdateBackingStoreState(respondImmediatelyOrNot);
}
void CoordinatedDrawingAreaProxy::sendUpdateBackingStoreState(RespondImmediatelyOrNot respondImmediatelyOrNot)
{
ASSERT(m_currentBackingStoreStateID < m_nextBackingStoreStateID);
if (!m_webPageProxy.isValid())
return;
if (m_isWaitingForDidUpdateBackingStoreState)
return;
if (m_webPageProxy.viewSize().isEmpty() && !m_webPageProxy.useFixedLayout())
return;
m_isWaitingForDidUpdateBackingStoreState = respondImmediatelyOrNot == RespondImmediately;
m_webPageProxy.process().send(Messages::DrawingArea::UpdateBackingStoreState(m_nextBackingStoreStateID, respondImmediatelyOrNot == RespondImmediately, m_webPageProxy.deviceScaleFactor(), m_size, m_scrollOffset), m_webPageProxy.pageID());
m_scrollOffset = IntSize();
if (m_isWaitingForDidUpdateBackingStoreState) {
// Start the responsiveness timer. We will stop it when we hear back from the WebProcess
// in didUpdateBackingStoreState.
m_webPageProxy.process().responsivenessTimer().start();
}
if (m_isWaitingForDidUpdateBackingStoreState && !m_layerTreeContext.isEmpty()) {
// Wait for the DidUpdateBackingStoreState message. Normally we do this in CoordinatedDrawingAreaProxy::paint, but that
// function is never called when in accelerated compositing mode.
waitForAndDispatchDidUpdateBackingStoreState();
}
}
void CoordinatedDrawingAreaProxy::waitForAndDispatchDidUpdateBackingStoreState()
{
ASSERT(m_isWaitingForDidUpdateBackingStoreState);
if (!m_webPageProxy.isValid())
return;
if (m_webPageProxy.process().state() == WebProcessProxy::State::Launching)
return;
// FIXME: waitForAndDispatchImmediately will always return the oldest DidUpdateBackingStoreState message that
// hasn't yet been processed. But it might be better to skip ahead to some other DidUpdateBackingStoreState
// message, if multiple DidUpdateBackingStoreState messages are waiting to be processed. For instance, we could
// choose the most recent one, or the one that is closest to our current size.
// The timeout, in seconds, we use when waiting for a DidUpdateBackingStoreState message when we're asked to paint.
m_webPageProxy.process().connection()->waitForAndDispatchImmediately<Messages::DrawingAreaProxy::DidUpdateBackingStoreState>(m_webPageProxy.pageID(), std::chrono::milliseconds(500));
}
void CoordinatedDrawingAreaProxy::enterAcceleratedCompositingMode(const LayerTreeContext& layerTreeContext)
{
ASSERT(!isInAcceleratedCompositingMode());
m_layerTreeContext = layerTreeContext;
m_webPageProxy.enterAcceleratedCompositingMode(layerTreeContext);
}
void CoordinatedDrawingAreaProxy::setVisibleContentsRect(const WebCore::FloatRect& visibleContentsRect, const WebCore::FloatPoint& trajectoryVector)
{
m_coordinatedLayerTreeHostProxy->setVisibleContentsRect(visibleContentsRect, trajectoryVector);
}
void CoordinatedDrawingAreaProxy::exitAcceleratedCompositingMode()
{
ASSERT(isInAcceleratedCompositingMode());
m_layerTreeContext = LayerTreeContext();
m_webPageProxy.exitAcceleratedCompositingMode();
}
void CoordinatedDrawingAreaProxy::updateAcceleratedCompositingMode(const LayerTreeContext& layerTreeContext)
{
ASSERT(isInAcceleratedCompositingMode());
m_layerTreeContext = layerTreeContext;
m_webPageProxy.updateAcceleratedCompositingMode(layerTreeContext);
}
} // namespace WebKit
#endif // USE(COORDINATED_GRAPHICS)
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