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<dt>Revision</dt> <dd><a href="http://trac.webkit.org/projects/webkit/changeset/180048">180048</a></dd>
<dt>Author</dt> <dd>matthew_hanson@apple.com</dd>
<dt>Date</dt> <dd>2015-02-13 09:02:20 -0800 (Fri, 13 Feb 2015)</dd>
</dl>
<h3>Log Message</h3>
<pre>Merge <a href="http://trac.webkit.org/projects/webkit/changeset/179771">r179771</a>. rdar://problem/19395131</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#branchessafari6001415branchLayoutTestsChangeLog">branches/safari-600.1.4.15-branch/LayoutTests/ChangeLog</a></li>
<li><a href="#branchessafari6001415branchSourceWebCoreChangeLog">branches/safari-600.1.4.15-branch/Source/WebCore/ChangeLog</a></li>
<li><a href="#branchessafari6001415branchSourceWebCorerenderingRenderLayerCompositorcpp">branches/safari-600.1.4.15-branch/Source/WebCore/rendering/RenderLayerCompositor.cpp</a></li>
<li><a href="#branchessafari6001415branchSourceWebCorerenderingRenderLayerCompositorh">branches/safari-600.1.4.15-branch/Source/WebCore/rendering/RenderLayerCompositor.h</a></li>
</ul>
<h3>Added Paths</h3>
<ul>
<li><a href="#branchessafari6001415branchLayoutTestscompositinglayercreationsubpixeladjacentlayersoverlapexpectedtxt">branches/safari-600.1.4.15-branch/LayoutTests/compositing/layer-creation/subpixel-adjacent-layers-overlap-expected.txt</a></li>
<li><a href="#branchessafari6001415branchLayoutTestscompositinglayercreationsubpixeladjacentlayersoverlaphtml">branches/safari-600.1.4.15-branch/LayoutTests/compositing/layer-creation/subpixel-adjacent-layers-overlap.html</a></li>
</ul>
</div>
<div id="patch">
<h3>Diff</h3>
<a id="branchessafari6001415branchLayoutTestsChangeLog"></a>
<div class="modfile"><h4>Modified: branches/safari-600.1.4.15-branch/LayoutTests/ChangeLog (180047 => 180048)</h4>
<pre class="diff"><span>
<span class="info">--- branches/safari-600.1.4.15-branch/LayoutTests/ChangeLog 2015-02-13 17:02:15 UTC (rev 180047)
+++ branches/safari-600.1.4.15-branch/LayoutTests/ChangeLog 2015-02-13 17:02:20 UTC (rev 180048)
</span><span class="lines">@@ -1,5 +1,21 @@
</span><span class="cx"> 2015-02-13 Matthew Hanson <matthew_hanson@apple.com>
</span><span class="cx">
</span><ins>+ Merge r179771. rdar://problem/19395131
+
+ 2015-02-06 Simon Fraser <simon.fraser@apple.com>
+
+ Convert the compositing overlap map to use LayoutRects
+ https://bugs.webkit.org/show_bug.cgi?id=141346
+
+ Reviewed by Zalan Bujtas.
+
+ Test with adjacent layers on non-pixel boundaries.
+
+ * compositing/layer-creation/subpixel-adjacent-layers-overlap-expected.txt: Added.
+ * compositing/layer-creation/subpixel-adjacent-layers-overlap.html: Added.
+
+2015-02-13 Matthew Hanson <matthew_hanson@apple.com>
+
</ins><span class="cx"> Merge r179706. rdar://problem/19719085
</span><span class="cx">
</span><span class="cx"> 2015-02-05 Maciej Stachowiak <mjs@apple.com>
</span></span></pre></div>
<a id="branchessafari6001415branchLayoutTestscompositinglayercreationsubpixeladjacentlayersoverlapexpectedtxt"></a>
<div class="addfile"><h4>Added: branches/safari-600.1.4.15-branch/LayoutTests/compositing/layer-creation/subpixel-adjacent-layers-overlap-expected.txt (0 => 180048)</h4>
<pre class="diff"><span>
<span class="info">--- branches/safari-600.1.4.15-branch/LayoutTests/compositing/layer-creation/subpixel-adjacent-layers-overlap-expected.txt (rev 0)
+++ branches/safari-600.1.4.15-branch/LayoutTests/compositing/layer-creation/subpixel-adjacent-layers-overlap-expected.txt 2015-02-13 17:02:20 UTC (rev 180048)
</span><span class="lines">@@ -0,0 +1,20 @@
</span><ins>+Here is some text
+
+(GraphicsLayer
+ (anchor 0.00 0.00)
+ (bounds 800.00 600.00)
+ (children 1
+ (GraphicsLayer
+ (bounds 800.00 600.00)
+ (contentsOpaque 1)
+ (children 1
+ (GraphicsLayer
+ (position 0.00 44.00)
+ (anchor 0.50 0.50)
+ (bounds 200.00 201.00)
+ )
+ )
+ )
+ )
+)
+
</ins></span></pre></div>
<a id="branchessafari6001415branchLayoutTestscompositinglayercreationsubpixeladjacentlayersoverlaphtml"></a>
<div class="addfile"><h4>Added: branches/safari-600.1.4.15-branch/LayoutTests/compositing/layer-creation/subpixel-adjacent-layers-overlap.html (0 => 180048)</h4>
<pre class="diff"><span>
<span class="info">--- branches/safari-600.1.4.15-branch/LayoutTests/compositing/layer-creation/subpixel-adjacent-layers-overlap.html (rev 0)
+++ branches/safari-600.1.4.15-branch/LayoutTests/compositing/layer-creation/subpixel-adjacent-layers-overlap.html 2015-02-13 17:02:20 UTC (rev 180048)
</span><span class="lines">@@ -0,0 +1,43 @@
</span><ins>+<!DOCTYPE html>
+
+<html>
+<head>
+ <style>
+ body {
+ margin: 0;
+ }
+ .box {
+ height: 200px;
+ width: 200px;
+ background-color: silver;
+ position: relative;
+ }
+ .composited {
+ -webkit-transform: translateZ(0);
+ }
+
+ p {
+ height: 12.345px; /* Subpixel height */
+ }
+ </style>
+ <script>
+ if (window.testRunner)
+ testRunner.dumpAsText();
+
+ function runTest()
+ {
+ if (window.testRunner)
+ document.getElementById('layers').innerText = window.internals.layerTreeAsText(document);
+ }
+ window.addEventListener('load', runTest, false);
+ </script>
+</head>
+<body>
+<p>Here is some text</p>
+<div class="composited box">
+</div>
+<div class="box">
+</div>
+<pre id="layers"></pre>
+</body>
+</html>
</ins></span></pre></div>
<a id="branchessafari6001415branchSourceWebCoreChangeLog"></a>
<div class="modfile"><h4>Modified: branches/safari-600.1.4.15-branch/Source/WebCore/ChangeLog (180047 => 180048)</h4>
<pre class="diff"><span>
<span class="info">--- branches/safari-600.1.4.15-branch/Source/WebCore/ChangeLog 2015-02-13 17:02:15 UTC (rev 180047)
+++ branches/safari-600.1.4.15-branch/Source/WebCore/ChangeLog 2015-02-13 17:02:20 UTC (rev 180048)
</span><span class="lines">@@ -1,5 +1,38 @@
</span><span class="cx"> 2015-02-13 Matthew Hanson <matthew_hanson@apple.com>
</span><span class="cx">
</span><ins>+ Merge r179771. rdar://problem/19395131
+
+ 2015-02-06 Simon Fraser <simon.fraser@apple.com>
+
+ Convert the compositing overlap map to use LayoutRects
+ https://bugs.webkit.org/show_bug.cgi?id=141346
+ rdar://problem/18206365
+
+ Reviewed by Zalan Bujtas.
+
+ If two compositing layers were adjoining but not overlapping, but happened to
+ have non-integral offsets, then using enclosing IntRects in the overlap map
+ would cause us to think they are overlapping, and create unnecessary backing store.
+
+ Fix by converting the overlap map to use LayoutRects.
+
+ Test: compositing/layer-creation/subpixel-adjacent-layers-overlap.html
+
+ * rendering/RenderLayerCompositor.cpp:
+ (WebCore::OverlapMapContainer::add):
+ (WebCore::OverlapMapContainer::overlapsLayers):
+ (WebCore::RenderLayerCompositor::OverlapMap::add):
+ (WebCore::RenderLayerCompositor::OverlapMap::overlapsLayers):
+ (WebCore::RenderLayerCompositor::OverlapMap::RectList::append):
+ (WebCore::RenderLayerCompositor::OverlapMap::RectList::intersects):
+ (WebCore::RenderLayerCompositor::logLayerInfo):
+ (WebCore::RenderLayerCompositor::addToOverlapMap):
+ (WebCore::RenderLayerCompositor::addToOverlapMapRecursive):
+ (WebCore::RenderLayerCompositor::computeCompositingRequirements):
+ * rendering/RenderLayerCompositor.h:
+
+2015-02-13 Matthew Hanson <matthew_hanson@apple.com>
+
</ins><span class="cx"> Merge r179750. rdar://problem/19719085
</span><span class="cx">
</span><span class="cx"> 2015-02-06 Maciej Stachowiak <mjs@apple.com>
</span></span></pre></div>
<a id="branchessafari6001415branchSourceWebCorerenderingRenderLayerCompositorcpp"></a>
<div class="modfile"><h4>Modified: branches/safari-600.1.4.15-branch/Source/WebCore/rendering/RenderLayerCompositor.cpp (180047 => 180048)</h4>
<pre class="diff"><span>
<span class="info">--- branches/safari-600.1.4.15-branch/Source/WebCore/rendering/RenderLayerCompositor.cpp 2015-02-13 17:02:15 UTC (rev 180047)
+++ branches/safari-600.1.4.15-branch/Source/WebCore/rendering/RenderLayerCompositor.cpp 2015-02-13 17:02:20 UTC (rev 180048)
</span><span class="lines">@@ -67,8 +67,6 @@
</span><span class="cx">
</span><span class="cx"> #if PLATFORM(IOS)
</span><span class="cx"> #include "LegacyTileCache.h"
</span><del>-#include "MainFrame.h"
-#include "Region.h"
</del><span class="cx"> #include "RenderScrollbar.h"
</span><span class="cx"> #endif
</span><span class="cx">
</span><span class="lines">@@ -101,13 +99,13 @@
</span><span class="cx">
</span><span class="cx"> class OverlapMapContainer {
</span><span class="cx"> public:
</span><del>- void add(const IntRect& bounds)
</del><ins>+ void add(const LayoutRect& bounds)
</ins><span class="cx"> {
</span><span class="cx"> m_layerRects.append(bounds);
</span><span class="cx"> m_boundingBox.unite(bounds);
</span><span class="cx"> }
</span><span class="cx">
</span><del>- bool overlapsLayers(const IntRect& bounds) const
</del><ins>+ bool overlapsLayers(const LayoutRect& bounds) const
</ins><span class="cx"> {
</span><span class="cx"> // Checking with the bounding box will quickly reject cases when
</span><span class="cx"> // layers are created for lists of items going in one direction and
</span><span class="lines">@@ -127,8 +125,8 @@
</span><span class="cx"> m_boundingBox.unite(otherContainer.m_boundingBox);
</span><span class="cx"> }
</span><span class="cx"> private:
</span><del>- Vector<IntRect> m_layerRects;
- IntRect m_boundingBox;
</del><ins>+ Vector<LayoutRect> m_layerRects;
+ LayoutRect m_boundingBox;
</ins><span class="cx"> };
</span><span class="cx">
</span><span class="cx"> class RenderLayerCompositor::OverlapMap {
</span><span class="lines">@@ -143,7 +141,7 @@
</span><span class="cx"> pushCompositingContainer();
</span><span class="cx"> }
</span><span class="cx">
</span><del>- void add(const RenderLayer* layer, const IntRect& bounds)
</del><ins>+ void add(const RenderLayer* layer, const LayoutRect& bounds)
</ins><span class="cx"> {
</span><span class="cx"> // Layers do not contribute to overlap immediately--instead, they will
</span><span class="cx"> // contribute to overlap as soon as their composited ancestor has been
</span><span class="lines">@@ -158,7 +156,7 @@
</span><span class="cx"> return m_layers.contains(layer);
</span><span class="cx"> }
</span><span class="cx">
</span><del>- bool overlapsLayers(const IntRect& bounds) const
</del><ins>+ bool overlapsLayers(const LayoutRect& bounds) const
</ins><span class="cx"> {
</span><span class="cx"> return m_overlapStack.last().overlapsLayers(bounds);
</span><span class="cx"> }
</span><span class="lines">@@ -183,10 +181,10 @@
</span><span class="cx">
</span><span class="cx"> private:
</span><span class="cx"> struct RectList {
</span><del>- Vector<IntRect> rects;
- IntRect boundingRect;
</del><ins>+ Vector<LayoutRect> rects;
+ LayoutRect boundingRect;
</ins><span class="cx">
</span><del>- void append(const IntRect& rect)
</del><ins>+ void append(const LayoutRect& rect)
</ins><span class="cx"> {
</span><span class="cx"> rects.append(rect);
</span><span class="cx"> boundingRect.unite(rect);
</span><span class="lines">@@ -198,7 +196,7 @@
</span><span class="cx"> boundingRect.unite(rectList.boundingRect);
</span><span class="cx"> }
</span><span class="cx">
</span><del>- bool intersects(const IntRect& rect) const
</del><ins>+ bool intersects(const LayoutRect& rect) const
</ins><span class="cx"> {
</span><span class="cx"> if (!rects.size() || !boundingRect.intersects(rect))
</span><span class="cx"> return false;
</span><span class="lines">@@ -814,9 +812,12 @@
</span><span class="cx"> m_secondaryBackingStoreBytes += backing->backingStoreMemoryEstimate();
</span><span class="cx"> }
</span><span class="cx">
</span><ins>+ LayoutRect absoluteBounds = backing->compositedBounds();
+ absoluteBounds.move(layer.offsetFromAncestor(m_renderView.layer()));
+
</ins><span class="cx"> StringBuilder logString;
</span><del>- logString.append(String::format("%*p %dx%d %.2fKB", 12 + depth * 2, &layer,
- backing->compositedBounds().width().round(), backing->compositedBounds().height().round(),
</del><ins>+ logString.append(String::format("%*p (%.6f,%.6f-%.6f,%.6f) %.2fKB", 12 + depth * 2, &layer,
+ absoluteBounds.x().toFloat(), absoluteBounds.y().toFloat(), absoluteBounds.maxX().toFloat(), absoluteBounds.maxY().toFloat(),
</ins><span class="cx"> backing->backingStoreMemoryEstimate() / 1024));
</span><span class="cx">
</span><span class="cx"> logString.append(" (");
</span><span class="lines">@@ -1083,7 +1084,7 @@
</span><span class="cx"> return nullptr;
</span><span class="cx"> }
</span><span class="cx">
</span><del>-void RenderLayerCompositor::addToOverlapMap(OverlapMap& overlapMap, RenderLayer& layer, IntRect& layerBounds, bool& boundsComputed)
</del><ins>+void RenderLayerCompositor::addToOverlapMap(OverlapMap& overlapMap, RenderLayer& layer, LayoutRect& layerBounds, bool& boundsComputed)
</ins><span class="cx"> {
</span><span class="cx"> if (layer.isRootLayer())
</span><span class="cx"> return;
</span><span class="lines">@@ -1091,14 +1092,14 @@
</span><span class="cx"> if (!boundsComputed) {
</span><span class="cx"> // FIXME: If this layer's overlap bounds include its children, we don't need to add its
</span><span class="cx"> // children's bounds to the overlap map.
</span><del>- layerBounds = enclosingIntRect(overlapMap.geometryMap().absoluteRect(layer.overlapBounds()));
</del><ins>+ layerBounds = enclosingLayoutRect(overlapMap.geometryMap().absoluteRect(layer.overlapBounds()));
</ins><span class="cx"> // Empty rects never intersect, but we need them to for the purposes of overlap testing.
</span><span class="cx"> if (layerBounds.isEmpty())
</span><del>- layerBounds.setSize(IntSize(1, 1));
</del><ins>+ layerBounds.setSize(LayoutSize(1, 1));
</ins><span class="cx"> boundsComputed = true;
</span><span class="cx"> }
</span><span class="cx">
</span><del>- IntRect clipRect = pixelSnappedIntRect(layer.backgroundClipRect(RenderLayer::ClipRectsContext(&rootRenderLayer(), AbsoluteClipRects)).rect()); // FIXME: Incorrect for CSS regions.
</del><ins>+ LayoutRect clipRect = layer.backgroundClipRect(RenderLayer::ClipRectsContext(&rootRenderLayer(), AbsoluteClipRects)).rect(); // FIXME: Incorrect for CSS regions.
</ins><span class="cx">
</span><span class="cx"> // On iOS, pageScaleFactor() is not applied by RenderView, so we should not scale here.
</span><span class="cx"> // FIXME: Set Settings::delegatesPageScaling to true for iOS.
</span><span class="lines">@@ -1120,7 +1121,7 @@
</span><span class="cx"> if (ancestorLayer)
</span><span class="cx"> overlapMap.geometryMap().pushMappingsToAncestor(&layer, ancestorLayer);
</span><span class="cx">
</span><del>- IntRect bounds;
</del><ins>+ LayoutRect bounds;
</ins><span class="cx"> bool haveComputedBounds = false;
</span><span class="cx"> addToOverlapMap(overlapMap, layer, bounds, haveComputedBounds);
</span><span class="cx">
</span><span class="lines">@@ -1208,16 +1209,16 @@
</span><span class="cx">
</span><span class="cx"> RenderLayer::IndirectCompositingReason compositingReason = compositingState.m_subtreeIsCompositing ? RenderLayer::IndirectCompositingReason::Stacking : RenderLayer::IndirectCompositingReason::None;
</span><span class="cx"> bool haveComputedBounds = false;
</span><del>- IntRect absBounds;
</del><ins>+ LayoutRect absBounds;
</ins><span class="cx">
</span><span class="cx"> // If we know for sure the layer is going to be composited, don't bother looking it up in the overlap map
</span><span class="cx"> if (!willBeComposited && overlapMap && !overlapMap->isEmpty() && compositingState.m_testingOverlap) {
</span><span class="cx"> // If we're testing for overlap, we only need to composite if we overlap something that is already composited.
</span><del>- absBounds = enclosingIntRect(overlapMap->geometryMap().absoluteRect(layer.overlapBounds()));
</del><ins>+ absBounds = enclosingLayoutRect(overlapMap->geometryMap().absoluteRect(layer.overlapBounds()));
</ins><span class="cx">
</span><span class="cx"> // Empty rects never intersect, but we need them to for the purposes of overlap testing.
</span><span class="cx"> if (absBounds.isEmpty())
</span><del>- absBounds.setSize(IntSize(1, 1));
</del><ins>+ absBounds.setSize(LayoutSize(1, 1));
</ins><span class="cx"> haveComputedBounds = true;
</span><span class="cx"> compositingReason = overlapMap->overlapsLayers(absBounds) ? RenderLayer::IndirectCompositingReason::Overlap : RenderLayer::IndirectCompositingReason::None;
</span><span class="cx"> }
</span></span></pre></div>
<a id="branchessafari6001415branchSourceWebCorerenderingRenderLayerCompositorh"></a>
<div class="modfile"><h4>Modified: branches/safari-600.1.4.15-branch/Source/WebCore/rendering/RenderLayerCompositor.h (180047 => 180048)</h4>
<pre class="diff"><span>
<span class="info">--- branches/safari-600.1.4.15-branch/Source/WebCore/rendering/RenderLayerCompositor.h 2015-02-13 17:02:15 UTC (rev 180047)
+++ branches/safari-600.1.4.15-branch/Source/WebCore/rendering/RenderLayerCompositor.h 2015-02-13 17:02:20 UTC (rev 180048)
</span><span class="lines">@@ -332,7 +332,7 @@
</span><span class="cx"> // Repaint this and its child layers.
</span><span class="cx"> void recursiveRepaintLayer(RenderLayer&);
</span><span class="cx">
</span><del>- void addToOverlapMap(OverlapMap&, RenderLayer&, IntRect& layerBounds, bool& boundsComputed);
</del><ins>+ void addToOverlapMap(OverlapMap&, RenderLayer&, LayoutRect& layerBounds, bool& boundsComputed);
</ins><span class="cx"> void addToOverlapMapRecursive(OverlapMap&, RenderLayer&, RenderLayer* ancestorLayer = nullptr);
</span><span class="cx">
</span><span class="cx"> void updateCompositingLayersTimerFired(Timer<RenderLayerCompositor>&);
</span></span></pre>
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