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/*
* Copyright (C) 2010, 2011 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"
#include "TiledDrawingArea.h"
#if USE(TILED_BACKING_STORE)
#include "DrawingAreaProxyMessages.h"
#include "MessageID.h"
#include "UpdateInfo.h"
#include "WebCoreArgumentCoders.h"
#include "WebPage.h"
#include "WebProcess.h"
using namespace WebCore;
namespace WebKit {
TiledDrawingArea::TiledDrawingArea(WebPage* webPage)
: DrawingArea(DrawingAreaTypeTiled, webPage)
, m_suspended(false)
, m_isWaitingForUIProcess(false)
, m_didSendTileUpdate(false)
, m_mainBackingStore(adoptPtr(new TiledBackingStore(this, TiledBackingStoreRemoteTileBackend::create(this))))
{
}
TiledDrawingArea::~TiledDrawingArea()
{
}
void TiledDrawingArea::scroll(const IntRect& scrollRect, const IntSize& scrollDelta)
{
// FIXME: Do something much smarter.
setNeedsDisplay(scrollRect);
}
void TiledDrawingArea::setNeedsDisplay(const IntRect& rect)
{
m_mainBackingStore->invalidate(rect);
}
void TiledDrawingArea::setSize(const IntSize& viewSize)
{
ASSERT(!m_suspended);
ASSERT_ARG(viewSize, !viewSize.isEmpty());
m_webPage->setSize(viewSize);
}
void TiledDrawingArea::setVisibleContentRectAndScale(const WebCore::IntRect& visibleContentsRect, float scale)
{
m_visibleContentRect = visibleContentsRect;
if (scale != m_mainBackingStore->contentsScale()) {
// Keep the tiles for the previous scale until enough content is available to be shown on the screen for the new scale.
// If we already have a previous set of tiles it means that two scale changed happened successively.
// In that case, make sure that our current main tiles have more content to show than the "previous previous"
// within the visible rect before replacing it.
if (!m_previousBackingStore || m_mainBackingStore->coverageRatio(m_visibleContentRect) > m_previousBackingStore->coverageRatio(m_visibleContentRect))
m_previousBackingStore = m_mainBackingStore.release();
m_mainBackingStore = adoptPtr(new TiledBackingStore(this, TiledBackingStoreRemoteTileBackend::create(this)));
m_mainBackingStore->setContentsScale(scale);
} else
m_mainBackingStore->adjustVisibleRect();
}
void TiledDrawingArea::setVisibleContentRectTrajectoryVector(const WebCore::FloatPoint& trajectoryVector)
{
m_mainBackingStore->setVisibleRectTrajectoryVector(trajectoryVector);
}
void TiledDrawingArea::renderNextFrame()
{
m_isWaitingForUIProcess = false;
m_mainBackingStore->updateTileBuffers();
}
void TiledDrawingArea::suspendPainting()
{
ASSERT(!m_suspended);
m_suspended = true;
}
void TiledDrawingArea::resumePainting()
{
ASSERT(m_suspended);
m_suspended = false;
m_mainBackingStore->updateTileBuffers();
}
void TiledDrawingArea::tiledBackingStorePaintBegin()
{
m_webPage->layoutIfNeeded();
}
void TiledDrawingArea::tiledBackingStorePaint(GraphicsContext* graphicsContext, const IntRect& contentRect)
{
m_webPage->drawRect(*graphicsContext, contentRect);
}
void TiledDrawingArea::tiledBackingStorePaintEnd(const Vector<IntRect>& paintedArea)
{
if (m_didSendTileUpdate) {
// Since we know that all tile updates following a page invalidate will all be rendered
// in one paint pass for all the tiles, we can send the swap tile message here.
m_webPage->send(Messages::DrawingAreaProxy::DidRenderFrame());
m_isWaitingForUIProcess = true;
m_didSendTileUpdate = false;
// Make sure that we destroy the previous backing store and remove its tiles only after DidRenderFrame
// was sent to swap recently created tiles' buffer. Else a frame could be rendered after the previous
// tiles were removed and before the new tile have their first back buffer swapped.
if (m_previousBackingStore && m_mainBackingStore->coverageRatio(m_visibleContentRect) >= 1.0f)
m_previousBackingStore.clear();
}
}
bool TiledDrawingArea::tiledBackingStoreUpdatesAllowed() const
{
return !m_suspended && !m_isWaitingForUIProcess;
}
IntRect TiledDrawingArea::tiledBackingStoreContentsRect()
{
return IntRect(IntPoint::zero(), m_webPage->size());
}
IntRect TiledDrawingArea::tiledBackingStoreVisibleRect()
{
return m_visibleContentRect;
}
Color TiledDrawingArea::tiledBackingStoreBackgroundColor() const
{
return Color::transparent;
}
void TiledDrawingArea::createTile(int tileID, const UpdateInfo& updateInfo)
{
m_webPage->send(Messages::DrawingAreaProxy::CreateTile(tileID, updateInfo));
m_didSendTileUpdate = true;
}
void TiledDrawingArea::updateTile(int tileID, const UpdateInfo& updateInfo)
{
m_webPage->send(Messages::DrawingAreaProxy::UpdateTile(tileID, updateInfo));
m_didSendTileUpdate = true;
}
void TiledDrawingArea::removeTile(int tileID)
{
m_webPage->send(Messages::DrawingAreaProxy::RemoveTile(tileID));
}
#if USE(ACCELERATED_COMPOSITING) && USE(TEXTURE_MAPPER)
void TiledDrawingArea::didReceiveLayerTreeHostMessage(CoreIPC::Connection* connection, CoreIPC::MessageID, CoreIPC::ArgumentDecoder* arguments)
{
}
#endif
} // namespace WebKit
#endif // USE(TILED_BACKING_STORE)
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