Imported WebKit commit 2ea9d364d0f6efa8fa64acf19f451504c59be0e4 (http://svn.webkit.org/repository/webkit/trunk@104285)

1 files changed, 467 insertions, 0 deletions

diff --git a/Source/WebKit2/WebProcess/WebPage/qt/LayerTreeHostQt.cpp b/Source/WebKit2/WebProcess/WebPage/qt/LayerTreeHostQt.cpp
new file mode 100644
index 000000000..266a3a95d
--- /dev/null
+++ b/Source/WebKit2/WebProcess/WebPage/qt/LayerTreeHostQt.cpp
@@ -0,0 +1,467 @@
+/*
+ * Copyright (C) 2011 Apple Inc. All rights reserved.
+ * Copyright (C) 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"
+
+#if USE(ACCELERATED_COMPOSITING)
+
+#include "LayerTreeHostQt.h"
+
+#include "DrawingAreaImpl.h"
+#include "GraphicsContext.h"
+#include "LayerTreeHostProxyMessages.h"
+#include "MessageID.h"
+#include "WebGraphicsLayer.h"
+#include "WebPage.h"
+#include <WebCore/Frame.h>
+#include <WebCore/FrameView.h>
+#include <WebCore/Page.h>
+#include <WebCore/Settings.h>
+
+using namespace WebCore;
+
+namespace WebKit {
+
+PassRefPtr<LayerTreeHostQt> LayerTreeHostQt::create(WebPage* webPage)
+{
+    return adoptRef(new LayerTreeHostQt(webPage));
+}
+
+LayerTreeHostQt::~LayerTreeHostQt()
+{
+}
+
+LayerTreeHostQt::LayerTreeHostQt(WebPage* webPage)
+    : LayerTreeHost(webPage)
+    , m_notifyAfterScheduledLayerFlush(false)
+    , m_isValid(true)
+#if USE(TILED_BACKING_STORE)
+    , m_waitingForUIProcess(false)
+    , m_isSuspended(false)
+#endif
+    , m_shouldSyncFrame(false)
+    , m_shouldSyncRootLayer(true)
+    , m_layerFlushTimer(this, &LayerTreeHostQt::layerFlushTimerFired)
+    , m_layerFlushSchedulingEnabled(true)
+    , m_shouldRecreateBackingStore(false)
+{
+    // Create a root layer.
+    m_rootLayer = GraphicsLayer::create(this);
+    WebGraphicsLayer* webRootLayer = toWebGraphicsLayer(m_rootLayer.get());
+    webRootLayer->setRootLayer(true);
+#ifndef NDEBUG
+    m_rootLayer->setName("LayerTreeHostQt root layer");
+#endif
+    m_rootLayer->setDrawsContent(false);
+    m_rootLayer->setSize(m_webPage->size());
+    m_layerTreeContext.webLayerID = toWebGraphicsLayer(webRootLayer)->id();
+
+    m_nonCompositedContentLayer = GraphicsLayer::create(this);
+#if USE(TILED_BACKING_STORE)
+    toWebGraphicsLayer(m_rootLayer.get())->setLayerTreeTileClient(this);
+#endif
+#ifndef NDEBUG
+    m_nonCompositedContentLayer->setName("LayerTreeHostQt non-composited content");
+#endif
+    m_nonCompositedContentLayer->setDrawsContent(true);
+    m_nonCompositedContentLayer->setContentsOpaque(m_webPage->drawsBackground() && !m_webPage->drawsTransparentBackground());
+    m_nonCompositedContentLayer->setSize(m_webPage->size());
+
+    m_rootLayer->addChild(m_nonCompositedContentLayer.get());
+
+    if (m_webPage->hasPageOverlay())
+        createPageOverlayLayer();
+
+    scheduleLayerFlush();
+}
+
+void LayerTreeHostQt::setLayerFlushSchedulingEnabled(bool layerFlushingEnabled)
+{
+    if (m_layerFlushSchedulingEnabled == layerFlushingEnabled)
+        return;
+
+    m_layerFlushSchedulingEnabled = layerFlushingEnabled;
+
+    if (m_layerFlushSchedulingEnabled) {
+        scheduleLayerFlush();
+        return;
+    }
+
+    cancelPendingLayerFlush();
+}
+
+void LayerTreeHostQt::scheduleLayerFlush()
+{
+    if (!m_layerFlushSchedulingEnabled)
+        return;
+
+    if (!m_layerFlushTimer.isActive())
+        m_layerFlushTimer.startOneShot(0);
+}
+
+void LayerTreeHostQt::cancelPendingLayerFlush()
+{
+    m_layerFlushTimer.stop();
+}
+
+void LayerTreeHostQt::setShouldNotifyAfterNextScheduledLayerFlush(bool notifyAfterScheduledLayerFlush)
+{
+    m_notifyAfterScheduledLayerFlush = notifyAfterScheduledLayerFlush;
+}
+
+void LayerTreeHostQt::setRootCompositingLayer(WebCore::GraphicsLayer* graphicsLayer)
+{
+    m_nonCompositedContentLayer->removeAllChildren();
+
+    // Add the accelerated layer tree hierarchy.
+    if (graphicsLayer)
+        m_nonCompositedContentLayer->addChild(graphicsLayer);
+}
+
+void LayerTreeHostQt::invalidate()
+{
+    cancelPendingLayerFlush();
+
+    ASSERT(m_isValid);
+    m_rootLayer = nullptr;
+    m_isValid = false;
+}
+
+void LayerTreeHostQt::setNonCompositedContentsNeedDisplay(const WebCore::IntRect& rect)
+{
+    m_nonCompositedContentLayer->setNeedsDisplayInRect(rect);
+    if (m_pageOverlayLayer)
+        m_pageOverlayLayer->setNeedsDisplayInRect(rect);
+
+    scheduleLayerFlush();
+}
+
+void LayerTreeHostQt::scrollNonCompositedContents(const WebCore::IntRect& scrollRect, const WebCore::IntSize& scrollOffset)
+{
+    setNonCompositedContentsNeedDisplay(scrollRect);
+}
+
+void LayerTreeHostQt::forceRepaint()
+{
+    scheduleLayerFlush();
+}
+
+void LayerTreeHostQt::sizeDidChange(const WebCore::IntSize& newSize)
+{
+    m_rootLayer->setSize(newSize);
+
+    // If the newSize exposes new areas of the non-composited content a setNeedsDisplay is needed
+    // for those newly exposed areas.
+    FloatSize oldSize = m_nonCompositedContentLayer->size();
+    m_nonCompositedContentLayer->setSize(newSize);
+
+    if (newSize.width() > oldSize.width()) {
+        float height = std::min(static_cast<float>(newSize.height()), oldSize.height());
+        m_nonCompositedContentLayer->setNeedsDisplayInRect(FloatRect(oldSize.width(), 0, newSize.width() - oldSize.width(), height));
+    }
+
+    if (newSize.height() > oldSize.height())
+        m_nonCompositedContentLayer->setNeedsDisplayInRect(FloatRect(0, oldSize.height(), newSize.width(), newSize.height() - oldSize.height()));
+
+    if (m_pageOverlayLayer)
+        m_pageOverlayLayer->setSize(newSize);
+
+    scheduleLayerFlush();
+}
+
+void LayerTreeHostQt::didInstallPageOverlay()
+{
+    createPageOverlayLayer();
+    scheduleLayerFlush();
+}
+
+void LayerTreeHostQt::didUninstallPageOverlay()
+{
+    destroyPageOverlayLayer();
+    scheduleLayerFlush();
+}
+
+void LayerTreeHostQt::setPageOverlayNeedsDisplay(const WebCore::IntRect& rect)
+{
+    ASSERT(m_pageOverlayLayer);
+    m_pageOverlayLayer->setNeedsDisplayInRect(rect);
+    scheduleLayerFlush();
+}
+
+bool LayerTreeHostQt::flushPendingLayerChanges()
+{
+    recreateBackingStoreIfNeeded();
+
+    bool didSync = m_webPage->corePage()->mainFrame()->view()->syncCompositingStateIncludingSubframes();
+    m_nonCompositedContentLayer->syncCompositingStateForThisLayerOnly();
+    if (m_pageOverlayLayer)
+        m_pageOverlayLayer->syncCompositingStateForThisLayerOnly();
+
+    m_rootLayer->syncCompositingStateForThisLayerOnly();
+    return didSync;
+}
+
+void LayerTreeHostQt::didSyncCompositingStateForLayer(const WebLayerInfo& info)
+{
+    m_shouldSyncFrame = true;
+    m_webPage->send(Messages::LayerTreeHostProxy::SyncCompositingLayerState(info));
+}
+
+void LayerTreeHostQt::didDeleteLayer(WebLayerID id)
+{
+    m_shouldSyncFrame = true;
+    m_webPage->send(Messages::LayerTreeHostProxy::DeleteCompositingLayer(id));
+}
+
+void LayerTreeHostQt::performScheduledLayerFlush()
+{
+    m_webPage->layoutIfNeeded();
+
+    if (!m_isValid)
+        return;
+
+#if USE(TILED_BACKING_STORE)
+    if (m_isSuspended || m_waitingForUIProcess)
+        return;
+#endif
+
+    m_shouldSyncFrame = false;
+    flushPendingLayerChanges();
+    if (!m_shouldSyncFrame)
+        return;
+
+    if (m_shouldSyncRootLayer) {
+        m_webPage->send(Messages::LayerTreeHostProxy::SetRootCompositingLayer(toWebGraphicsLayer(m_rootLayer.get())->id()));
+        m_shouldSyncRootLayer = false;
+    }
+
+    m_webPage->send(Messages::LayerTreeHostProxy::DidRenderFrame());
+
+    if (!m_notifyAfterScheduledLayerFlush)
+        return;
+
+    // Let the drawing area know that we've done a flush of the layer changes.
+    static_cast<DrawingAreaImpl*>(m_webPage->drawingArea())->layerHostDidFlushLayers();
+    m_notifyAfterScheduledLayerFlush = false;
+}
+
+void LayerTreeHostQt::layerFlushTimerFired(Timer<LayerTreeHostQt>*)
+{
+    performScheduledLayerFlush();
+}
+
+void LayerTreeHostQt::createPageOverlayLayer()
+{
+    ASSERT(!m_pageOverlayLayer);
+
+    m_pageOverlayLayer = GraphicsLayer::create(this);
+#ifndef NDEBUG
+    m_pageOverlayLayer->setName("LayerTreeHostQt page overlay content");
+#endif
+
+    m_pageOverlayLayer->setDrawsContent(true);
+    m_pageOverlayLayer->setSize(m_webPage->size());
+
+    m_rootLayer->addChild(m_pageOverlayLayer.get());
+}
+
+void LayerTreeHostQt::destroyPageOverlayLayer()
+{
+    ASSERT(m_pageOverlayLayer);
+    m_pageOverlayLayer->removeFromParent();
+    m_pageOverlayLayer = nullptr;
+}
+
+int64_t LayerTreeHostQt::adoptImageBackingStore(Image* image)
+{
+    if (!image)
+        return InvalidWebLayerID;
+    QPixmap* pixmap = image->nativeImageForCurrentFrame();
+
+    if (!pixmap)
+        return InvalidWebLayerID;
+
+    int64_t key = pixmap->cacheKey();
+    HashMap<int64_t, int>::iterator it = m_directlyCompositedImageRefCounts.find(key);
+
+    if (it != m_directlyCompositedImageRefCounts.end()) {
+        ++(it->second);
+        return key;
+    }
+
+    RefPtr<ShareableBitmap> bitmap = ShareableBitmap::createShareable(image->size(), image->currentFrameHasAlpha() ? ShareableBitmap::SupportsAlpha : 0);
+    {
+        OwnPtr<WebCore::GraphicsContext> graphicsContext = bitmap->createGraphicsContext();
+        graphicsContext->drawImage(image, ColorSpaceDeviceRGB, IntPoint::zero());
+    }
+
+    ShareableBitmap::Handle handle;
+    bitmap->createHandle(handle);
+    m_webPage->send(Messages::LayerTreeHostProxy::CreateDirectlyCompositedImage(key, handle));
+    m_directlyCompositedImageRefCounts.add(key, 1);
+    return key;
+}
+
+void LayerTreeHostQt::releaseImageBackingStore(int64_t key)
+{
+    if (!key)
+        return;
+    HashMap<int64_t, int>::iterator it = m_directlyCompositedImageRefCounts.find(key);
+    if (it == m_directlyCompositedImageRefCounts.end())
+        return;
+
+    it->second--;
+
+    if (it->second)
+        return;
+
+    m_directlyCompositedImageRefCounts.remove(it);
+    m_webPage->send(Messages::LayerTreeHostProxy::DestroyDirectlyCompositedImage(key));
+}
+
+
+void LayerTreeHostQt::notifyAnimationStarted(const WebCore::GraphicsLayer*, double time)
+{
+}
+
+void LayerTreeHostQt::notifySyncRequired(const WebCore::GraphicsLayer*)
+{
+}
+
+void LayerTreeHostQt::paintContents(const WebCore::GraphicsLayer* graphicsLayer, WebCore::GraphicsContext& graphicsContext, WebCore::GraphicsLayerPaintingPhase, const WebCore::IntRect& clipRect)
+{
+    if (graphicsLayer == m_nonCompositedContentLayer) {
+        m_webPage->drawRect(graphicsContext, clipRect);
+        return;
+    }
+
+    if (graphicsLayer == m_pageOverlayLayer) {
+        // Overlays contain transparent contents and won't clear the context as part of their rendering, so we do it here.
+        graphicsContext.clearRect(clipRect);
+        m_webPage->drawPageOverlay(graphicsContext, clipRect);
+        return;
+    }
+}
+
+bool LayerTreeHostQt::showDebugBorders() const
+{
+    return m_webPage->corePage()->settings()->showDebugBorders();
+}
+
+bool LayerTreeHostQt::showRepaintCounter() const
+{
+    return m_webPage->corePage()->settings()->showRepaintCounter();
+}
+
+bool LayerTreeHost::supportsAcceleratedCompositing()
+{
+    return true;
+}
+
+#if USE(TILED_BACKING_STORE)
+void LayerTreeHostQt::createTile(WebLayerID layerID, int tileID, const UpdateInfo& updateInfo)
+{
+    m_webPage->send(Messages::LayerTreeHostProxy::CreateTileForLayer(layerID, tileID, updateInfo));
+}
+
+void LayerTreeHostQt::updateTile(WebLayerID layerID, int tileID, const UpdateInfo& updateInfo)
+{
+    m_webPage->send(Messages::LayerTreeHostProxy::UpdateTileForLayer(layerID, tileID, updateInfo));
+}
+void LayerTreeHostQt::removeTile(WebLayerID layerID, int tileID)
+{
+    m_webPage->send(Messages::LayerTreeHostProxy::RemoveTileForLayer(layerID, tileID));
+}
+
+void LayerTreeHostQt::setVisibleContentRectForLayer(int layerID, const WebCore::IntRect& rect)
+{
+    WebGraphicsLayer* layer = WebGraphicsLayer::layerByID(layerID);
+    if (!layer)
+        return;
+    FloatRect visibleRect(rect);
+    layer->setVisibleContentRect(rect);
+}
+
+void LayerTreeHostQt::setVisibleContentRectAndScale(const IntRect& rect, float scale)
+{
+    WebGraphicsLayer* layer = toWebGraphicsLayer(m_rootLayer.get());
+    if (!layer)
+        return;
+    layer->setContentsScale(scale);
+    toWebGraphicsLayer(m_nonCompositedContentLayer.get())->setVisibleContentRect(rect);
+}
+
+void LayerTreeHostQt::setVisibleContentRectTrajectoryVector(const FloatPoint& trajectoryVector)
+{
+    toWebGraphicsLayer(m_nonCompositedContentLayer.get())->setVisibleContentRectTrajectoryVector(trajectoryVector);
+}
+
+void LayerTreeHostQt::renderNextFrame()
+{
+    m_waitingForUIProcess = false;
+    scheduleLayerFlush();
+}
+
+bool LayerTreeHostQt::layerTreeTileUpdatesAllowed() const
+{
+    return !m_isSuspended && !m_waitingForUIProcess;
+}
+
+void LayerTreeHostQt::purgeBackingStores()
+{
+    m_shouldRecreateBackingStore = true;
+    WebGraphicsLayer* webRootLayer = toWebGraphicsLayer(m_rootLayer.get());
+    webRootLayer->purgeBackingStores();
+
+    ASSERT(!m_directlyCompositedImageRefCounts.size());
+}
+
+void LayerTreeHostQt::recreateBackingStoreIfNeeded()
+{
+    if (!m_shouldRecreateBackingStore)
+        return;
+
+    m_shouldRecreateBackingStore = false;
+    WebGraphicsLayer* webRootLayer = toWebGraphicsLayer(m_rootLayer.get());
+    webRootLayer->recreateBackingStoreIfNeeded();
+}
+#endif
+
+} // namespace WebKit
+#else
+#include "LayerTreeHost.h"
+
+using namespace WebCore;
+
+namespace WebKit {
+
+bool LayerTreeHost::supportsAcceleratedCompositing()
+{
+    return false;
+}
+
+} // namespace WebKit
+#endif