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      1 /*
      2  * Copyright (C) 2011 Apple Inc. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions
      6  * are met:
      7  * 1. Redistributions of source code must retain the above copyright
      8  *    notice, this list of conditions and the following disclaimer.
      9  * 2. Redistributions in binary form must reproduce the above copyright
     10  *    notice, this list of conditions and the following disclaimer in the
     11  *    documentation and/or other materials provided with the distribution.
     12  *
     13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
     14  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
     15  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     16  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
     17  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     18  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     19  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     20  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     21  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     22  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
     23  * THE POSSIBILITY OF SUCH DAMAGE.
     24  */
     25 
     26 #include "config.h"
     27 #include "LayerTreeHostCA.h"
     28 
     29 #include "DrawingAreaImpl.h"
     30 #include "WebPage.h"
     31 #include "WebProcess.h"
     32 #include <WebCore/Frame.h>
     33 #include <WebCore/FrameView.h>
     34 #include <WebCore/GraphicsLayerCA.h>
     35 #include <WebCore/Page.h>
     36 #include <WebCore/PlatformCALayer.h>
     37 #include <WebCore/Settings.h>
     38 
     39 using namespace WebCore;
     40 
     41 namespace WebKit {
     42 
     43 LayerTreeHostCA::LayerTreeHostCA(WebPage* webPage)
     44     : LayerTreeHost(webPage)
     45     , m_isValid(true)
     46     , m_notifyAfterScheduledLayerFlush(false)
     47 {
     48 }
     49 
     50 void LayerTreeHostCA::initialize()
     51 {
     52     // Create a root layer.
     53     m_rootLayer = GraphicsLayer::create(this);
     54 #ifndef NDEBUG
     55     m_rootLayer->setName("LayerTreeHost root layer");
     56 #endif
     57     m_rootLayer->setDrawsContent(false);
     58     m_rootLayer->setSize(m_webPage->size());
     59     static_cast<GraphicsLayerCA*>(m_rootLayer.get())->platformCALayer()->setGeometryFlipped(true);
     60 
     61     m_nonCompositedContentLayer = GraphicsLayer::create(this);
     62     static_cast<GraphicsLayerCA*>(m_nonCompositedContentLayer.get())->setAllowTiledLayer(false);
     63 #ifndef NDEBUG
     64     m_nonCompositedContentLayer->setName("LayerTreeHost non-composited content");
     65 #endif
     66     m_nonCompositedContentLayer->setDrawsContent(true);
     67     m_nonCompositedContentLayer->setContentsOpaque(m_webPage->drawsBackground() && !m_webPage->drawsTransparentBackground());
     68     m_nonCompositedContentLayer->setSize(m_webPage->size());
     69     if (m_webPage->corePage()->settings()->acceleratedDrawingEnabled())
     70         m_nonCompositedContentLayer->setAcceleratesDrawing(true);
     71 
     72     m_rootLayer->addChild(m_nonCompositedContentLayer.get());
     73 
     74     if (m_webPage->hasPageOverlay())
     75         createPageOverlayLayer();
     76 
     77     platformInitialize(m_layerTreeContext);
     78 
     79     scheduleLayerFlush();
     80 }
     81 
     82 LayerTreeHostCA::~LayerTreeHostCA()
     83 {
     84     ASSERT(!m_isValid);
     85     ASSERT(!m_rootLayer);
     86 }
     87 
     88 const LayerTreeContext& LayerTreeHostCA::layerTreeContext()
     89 {
     90     return m_layerTreeContext;
     91 }
     92 
     93 void LayerTreeHostCA::setShouldNotifyAfterNextScheduledLayerFlush(bool notifyAfterScheduledLayerFlush)
     94 {
     95     m_notifyAfterScheduledLayerFlush = notifyAfterScheduledLayerFlush;
     96 }
     97 
     98 void LayerTreeHostCA::setRootCompositingLayer(GraphicsLayer* graphicsLayer)
     99 {
    100     m_nonCompositedContentLayer->removeAllChildren();
    101 
    102     // Add the accelerated layer tree hierarchy.
    103     if (graphicsLayer)
    104         m_nonCompositedContentLayer->addChild(graphicsLayer);
    105 }
    106 
    107 void LayerTreeHostCA::invalidate()
    108 {
    109     ASSERT(m_isValid);
    110     m_rootLayer = nullptr;
    111     m_isValid = false;
    112 }
    113 
    114 void LayerTreeHostCA::setNonCompositedContentsNeedDisplay(const IntRect& rect)
    115 {
    116     m_nonCompositedContentLayer->setNeedsDisplayInRect(rect);
    117     if (m_pageOverlayLayer)
    118         m_pageOverlayLayer->setNeedsDisplayInRect(rect);
    119 
    120     scheduleLayerFlush();
    121 }
    122 
    123 void LayerTreeHostCA::scrollNonCompositedContents(const IntRect& scrollRect, const IntSize& scrollOffset)
    124 {
    125     setNonCompositedContentsNeedDisplay(scrollRect);
    126 }
    127 
    128 void LayerTreeHostCA::sizeDidChange(const IntSize& newSize)
    129 {
    130     m_rootLayer->setSize(newSize);
    131     m_nonCompositedContentLayer->setSize(newSize);
    132 
    133     if (m_pageOverlayLayer)
    134         m_pageOverlayLayer->setSize(newSize);
    135 
    136     scheduleLayerFlush();
    137     flushPendingLayerChanges();
    138 }
    139 
    140 void LayerTreeHostCA::forceRepaint()
    141 {
    142     scheduleLayerFlush();
    143     flushPendingLayerChanges();
    144 }
    145 
    146 void LayerTreeHostCA::didInstallPageOverlay()
    147 {
    148     createPageOverlayLayer();
    149     scheduleLayerFlush();
    150 }
    151 
    152 void LayerTreeHostCA::didUninstallPageOverlay()
    153 {
    154     destroyPageOverlayLayer();
    155     scheduleLayerFlush();
    156 }
    157 
    158 void LayerTreeHostCA::setPageOverlayNeedsDisplay(const IntRect& rect)
    159 {
    160     ASSERT(m_pageOverlayLayer);
    161     m_pageOverlayLayer->setNeedsDisplayInRect(rect);
    162     scheduleLayerFlush();
    163 }
    164 
    165 void LayerTreeHostCA::notifyAnimationStarted(const WebCore::GraphicsLayer*, double time)
    166 {
    167 }
    168 
    169 void LayerTreeHostCA::notifySyncRequired(const WebCore::GraphicsLayer*)
    170 {
    171 }
    172 
    173 void LayerTreeHostCA::paintContents(const GraphicsLayer* graphicsLayer, GraphicsContext& graphicsContext, GraphicsLayerPaintingPhase, const IntRect& clipRect)
    174 {
    175     if (graphicsLayer == m_nonCompositedContentLayer) {
    176         m_webPage->drawRect(graphicsContext, clipRect);
    177         return;
    178     }
    179 
    180     if (graphicsLayer == m_pageOverlayLayer) {
    181         m_webPage->drawPageOverlay(graphicsContext, clipRect);
    182         return;
    183     }
    184 }
    185 
    186 bool LayerTreeHostCA::showDebugBorders() const
    187 {
    188     return m_webPage->corePage()->settings()->showDebugBorders();
    189 }
    190 
    191 bool LayerTreeHostCA::showRepaintCounter() const
    192 {
    193     return m_webPage->corePage()->settings()->showRepaintCounter();
    194 }
    195 
    196 void LayerTreeHostCA::performScheduledLayerFlush()
    197 {
    198     {
    199         RefPtr<LayerTreeHostCA> protect(this);
    200         m_webPage->layoutIfNeeded();
    201 
    202         if (!m_isValid)
    203             return;
    204     }
    205 
    206     if (!flushPendingLayerChanges())
    207         return;
    208 
    209     didPerformScheduledLayerFlush();
    210 }
    211 
    212 void LayerTreeHostCA::didPerformScheduledLayerFlush()
    213 {
    214     if (m_notifyAfterScheduledLayerFlush) {
    215         // Let the drawing area know that we've done a flush of the layer changes.
    216         static_cast<DrawingAreaImpl*>(m_webPage->drawingArea())->layerHostDidFlushLayers();
    217         m_notifyAfterScheduledLayerFlush = false;
    218     }
    219 }
    220 
    221 bool LayerTreeHostCA::flushPendingLayerChanges()
    222 {
    223     m_rootLayer->syncCompositingStateForThisLayerOnly();
    224     m_nonCompositedContentLayer->syncCompositingStateForThisLayerOnly();
    225     if (m_pageOverlayLayer)
    226         m_pageOverlayLayer->syncCompositingStateForThisLayerOnly();
    227 
    228     return m_webPage->corePage()->mainFrame()->view()->syncCompositingStateIncludingSubframes();
    229 }
    230 
    231 void LayerTreeHostCA::createPageOverlayLayer()
    232 {
    233     ASSERT(!m_pageOverlayLayer);
    234 
    235     m_pageOverlayLayer = GraphicsLayer::create(this);
    236 #ifndef NDEBUG
    237     m_pageOverlayLayer->setName("LayerTreeHost page overlay content");
    238 #endif
    239 
    240     m_pageOverlayLayer->setDrawsContent(true);
    241     m_pageOverlayLayer->setSize(m_webPage->size());
    242 
    243     m_rootLayer->addChild(m_pageOverlayLayer.get());
    244 }
    245 
    246 void LayerTreeHostCA::destroyPageOverlayLayer()
    247 {
    248     ASSERT(m_pageOverlayLayer);
    249     m_pageOverlayLayer->removeFromParent();
    250     m_pageOverlayLayer = nullptr;
    251 }
    252 
    253 } // namespace WebKit
    254