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<title>[166005] trunk/Source</title>
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<div id="msg">
<dl class="meta">
<dt>Revision</dt> <dd><a href="http://trac.webkit.org/projects/webkit/changeset/166005">166005</a></dd>
<dt>Author</dt> <dd>timothy_horton@apple.com</dd>
<dt>Date</dt> <dd>2014-03-20 15:06:38 -0700 (Thu, 20 Mar 2014)</dd>
</dl>

<h3>Log Message</h3>
<pre>Add WebCore::IOSurface wrapper
https://bugs.webkit.org/show_bug.cgi?id=130529

Reviewed by Simon Fraser.

* WebCore.exp.in:
* WebCore.xcodeproj/project.pbxproj:
* platform/graphics/cg/ColorCG.cpp:
* platform/graphics/cg/GraphicsContextCG.h:
(WebCore::cachedCGColorSpace):
Move cachedCGColorSpace out so that other clients of GraphicsContextCG
can use its mapping from WebCore::ColorSpace -&gt; CGColorSpaceRef.

* platform/graphics/cg/ImageBufferBackingStoreCache.cpp:
* platform/graphics/cg/ImageBufferCG.cpp:
Add FIXMEs for ImageBuffer to adopt WebCore::IOSurface.

* platform/graphics/cocoa/IOSurface.h: Added.
* platform/graphics/cocoa/IOSurface.mm: Added.
(IOSurface::create):
(IOSurface::createFromMachPort):
(IOSurface::createFromSurface):
(IOSurface::IOSurface):
(IOSurface::maximumSize):
(IOSurface::createMachPort):
(IOSurface::createImage):
(IOSurface::ensurePlatformContext):
(IOSurface::ensureGraphicsContext):
(IOSurface::state):
(IOSurface::isPurgeable):
(IOSurface::setIsPurgeable):
(IOSurface::inUse):
Add WebCore::IOSurface.

* Shared/mac/RemoteLayerBackingStore.h:
* Shared/mac/RemoteLayerBackingStore.mm:
(RemoteLayerBackingStore::encode):
(RemoteLayerBackingStore::decode):
(RemoteLayerBackingStore::display):
(RemoteLayerBackingStore::applyBackingStoreToLayer):
* UIProcess/ios/ViewGestureControllerIOS.mm:
(WebKit::ViewGestureController::beginSwipeGesture):
(WebKit::ViewGestureController::removeSwipeSnapshot):
* UIProcess/mac/ViewGestureController.h:
* UIProcess/mac/ViewGestureControllerMac.mm:
(WebKit::ViewGestureController::beginSwipeGesture):
(WebKit::ViewGestureController::removeSwipeSnapshot):
* UIProcess/mac/ViewSnapshotStore.h:
* UIProcess/mac/ViewSnapshotStore.mm:
(WebKit::createIOSurfaceFromImage):
(WebKit::ViewSnapshotStore::recordSnapshot):
Adopt WebCore::IOSurface.</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#trunkSourceWebCoreChangeLog">trunk/Source/WebCore/ChangeLog</a></li>
<li><a href="#trunkSourceWebCoreWebCoreexpin">trunk/Source/WebCore/WebCore.exp.in</a></li>
<li><a href="#trunkSourceWebCoreWebCorexcodeprojprojectpbxproj">trunk/Source/WebCore/WebCore.xcodeproj/project.pbxproj</a></li>
<li><a href="#trunkSourceWebCoreplatformgraphicscgColorCGcpp">trunk/Source/WebCore/platform/graphics/cg/ColorCG.cpp</a></li>
<li><a href="#trunkSourceWebCoreplatformgraphicscgGraphicsContextCGh">trunk/Source/WebCore/platform/graphics/cg/GraphicsContextCG.h</a></li>
<li><a href="#trunkSourceWebCoreplatformgraphicscgImageBufferBackingStoreCachecpp">trunk/Source/WebCore/platform/graphics/cg/ImageBufferBackingStoreCache.cpp</a></li>
<li><a href="#trunkSourceWebCoreplatformgraphicscgImageBufferCGcpp">trunk/Source/WebCore/platform/graphics/cg/ImageBufferCG.cpp</a></li>
<li><a href="#trunkSourceWebKit2ChangeLog">trunk/Source/WebKit2/ChangeLog</a></li>
<li><a href="#trunkSourceWebKit2SharedmacRemoteLayerBackingStoreh">trunk/Source/WebKit2/Shared/mac/RemoteLayerBackingStore.h</a></li>
<li><a href="#trunkSourceWebKit2SharedmacRemoteLayerBackingStoremm">trunk/Source/WebKit2/Shared/mac/RemoteLayerBackingStore.mm</a></li>
<li><a href="#trunkSourceWebKit2UIProcessiosViewGestureControllerIOSmm">trunk/Source/WebKit2/UIProcess/ios/ViewGestureControllerIOS.mm</a></li>
<li><a href="#trunkSourceWebKit2UIProcessmacViewGestureControllerh">trunk/Source/WebKit2/UIProcess/mac/ViewGestureController.h</a></li>
<li><a href="#trunkSourceWebKit2UIProcessmacViewGestureControllerMacmm">trunk/Source/WebKit2/UIProcess/mac/ViewGestureControllerMac.mm</a></li>
<li><a href="#trunkSourceWebKit2UIProcessmacViewSnapshotStoreh">trunk/Source/WebKit2/UIProcess/mac/ViewSnapshotStore.h</a></li>
<li><a href="#trunkSourceWebKit2UIProcessmacViewSnapshotStoremm">trunk/Source/WebKit2/UIProcess/mac/ViewSnapshotStore.mm</a></li>
</ul>

<h3>Added Paths</h3>
<ul>
<li><a href="#trunkSourceWebCoreplatformgraphicscocoaIOSurfaceh">trunk/Source/WebCore/platform/graphics/cocoa/IOSurface.h</a></li>
<li><a href="#trunkSourceWebCoreplatformgraphicscocoaIOSurfacemm">trunk/Source/WebCore/platform/graphics/cocoa/IOSurface.mm</a></li>
</ul>

</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunkSourceWebCoreChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/ChangeLog (166004 => 166005)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/ChangeLog        2014-03-20 21:53:03 UTC (rev 166004)
+++ trunk/Source/WebCore/ChangeLog        2014-03-20 22:06:38 UTC (rev 166005)
</span><span class="lines">@@ -1,3 +1,39 @@
</span><ins>+2014-03-20  Tim Horton  &lt;timothy_horton@apple.com&gt;
+
+        Add WebCore::IOSurface wrapper
+        https://bugs.webkit.org/show_bug.cgi?id=130529
+
+        Reviewed by Simon Fraser.
+
+        * WebCore.exp.in:
+        * WebCore.xcodeproj/project.pbxproj:
+        * platform/graphics/cg/ColorCG.cpp:
+        * platform/graphics/cg/GraphicsContextCG.h:
+        (WebCore::cachedCGColorSpace):
+        Move cachedCGColorSpace out so that other clients of GraphicsContextCG
+        can use its mapping from WebCore::ColorSpace -&gt; CGColorSpaceRef.
+
+        * platform/graphics/cg/ImageBufferBackingStoreCache.cpp:
+        * platform/graphics/cg/ImageBufferCG.cpp:
+        Add FIXMEs for ImageBuffer to adopt WebCore::IOSurface.
+
+        * platform/graphics/cocoa/IOSurface.h: Added.
+        * platform/graphics/cocoa/IOSurface.mm: Added.
+        (IOSurface::create):
+        (IOSurface::createFromMachPort):
+        (IOSurface::createFromSurface):
+        (IOSurface::IOSurface):
+        (IOSurface::maximumSize):
+        (IOSurface::createMachPort):
+        (IOSurface::createImage):
+        (IOSurface::ensurePlatformContext):
+        (IOSurface::ensureGraphicsContext):
+        (IOSurface::state):
+        (IOSurface::isPurgeable):
+        (IOSurface::setIsPurgeable):
+        (IOSurface::inUse):
+        Add WebCore::IOSurface.
+
</ins><span class="cx"> 2014-03-20  Pratik Solanki  &lt;psolanki@apple.com&gt;
</span><span class="cx"> 
</span><span class="cx">         iOS build fix after r165992.
</span></span></pre></div>
<a id="trunkSourceWebCoreWebCoreexpin"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/WebCore.exp.in (166004 => 166005)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/WebCore.exp.in        2014-03-20 21:53:03 UTC (rev 166004)
+++ trunk/Source/WebCore/WebCore.exp.in        2014-03-20 22:06:38 UTC (rev 166005)
</span><span class="lines">@@ -2711,11 +2711,6 @@
</span><span class="cx"> _wkCTFontTransformGlyphs
</span><span class="cx"> #endif
</span><span class="cx"> 
</span><del>-#if !PLATFORM(IOS_SIMULATOR)
-_wkIOSurfaceContextCreate
-_wkIOSurfaceContextCreateImage
-#endif
-
</del><span class="cx"> #if ENABLE(3D_RENDERING)
</span><span class="cx"> _WebCoreHas3DRendering
</span><span class="cx"> #endif
</span><span class="lines">@@ -3055,6 +3050,18 @@
</span><span class="cx"> __ZNK7WebCore9FloatQuad13containsPointERKNS_10FloatPointE
</span><span class="cx"> #endif
</span><span class="cx"> 
</span><ins>+#if USE(IOSURFACE)
+__ZN7WebCore9IOSurface14setIsPurgeableEb
+__ZN7WebCore9IOSurface18createFromMachPortEjNS_10ColorSpaceE
+__ZN7WebCore9IOSurface21ensureGraphicsContextEv
+__ZN7WebCore9IOSurface21ensurePlatformContextEv
+__ZN7WebCore9IOSurface6createENS_7IntSizeENS_10ColorSpaceE
+__ZNK7WebCore9IOSurface11createImageEv
+__ZNK7WebCore9IOSurface14createMachPortEv
+_wkIOSurfaceContextCreate
+_wkIOSurfaceContextCreateImage
+#endif
+
</ins><span class="cx"> #if ENABLE(IOS_TEXT_AUTOSIZING)
</span><span class="cx"> __ZN7WebCore12RenderObject19resetTextAutosizingEv
</span><span class="cx"> __ZN7WebCore5Frame22setTextAutosizingWidthEf
</span></span></pre></div>
<a id="trunkSourceWebCoreWebCorexcodeprojprojectpbxproj"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/WebCore.xcodeproj/project.pbxproj (166004 => 166005)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/WebCore.xcodeproj/project.pbxproj        2014-03-20 21:53:03 UTC (rev 166004)
+++ trunk/Source/WebCore/WebCore.xcodeproj/project.pbxproj        2014-03-20 22:06:38 UTC (rev 166005)
</span><span class="lines">@@ -1038,6 +1038,8 @@
</span><span class="cx">                 2B365C841525119E0091D27B /* RenderSVGEllipse.h in Headers */ = {isa = PBXBuildFile; fileRef = 2B4235A015250F6000DBBCD8 /* RenderSVGEllipse.h */; };
</span><span class="cx">                 2BE8E2C712A589EC00FAD550 /* HTMLMetaCharsetParser.h in Headers */ = {isa = PBXBuildFile; fileRef = 2BE8E2C612A589EC00FAD550 /* HTMLMetaCharsetParser.h */; };
</span><span class="cx">                 2BE8E2C912A58A0100FAD550 /* HTMLMetaCharsetParser.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 2BE8E2C812A58A0100FAD550 /* HTMLMetaCharsetParser.cpp */; };
</span><ins>+                2D0B4AAB18DA1CCD00434DE1 /* IOSurface.h in Headers */ = {isa = PBXBuildFile; fileRef = 2D0B4AA918DA1CCD00434DE1 /* IOSurface.h */; settings = {ATTRIBUTES = (Private, ); }; };
+                2D0B4AAC18DA1CCD00434DE1 /* IOSurface.mm in Sources */ = {isa = PBXBuildFile; fileRef = 2D0B4AAA18DA1CCD00434DE1 /* IOSurface.mm */; };
</ins><span class="cx">                 2D25396218CE7F6200270222 /* ImageControlsButtonElementMac.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 2D25396018CE7F6200270222 /* ImageControlsButtonElementMac.cpp */; };
</span><span class="cx">                 2D25396318CE7F6200270222 /* ImageControlsButtonElementMac.h in Headers */ = {isa = PBXBuildFile; fileRef = 2D25396118CE7F6200270222 /* ImageControlsButtonElementMac.h */; };
</span><span class="cx">                 2D3A0E3613A7D76100E85AF0 /* SVGParsingError.h in Headers */ = {isa = PBXBuildFile; fileRef = 2D3A0E3513A7D76100E85AF0 /* SVGParsingError.h */; settings = {ATTRIBUTES = (Private, ); }; };
</span><span class="lines">@@ -7901,6 +7903,8 @@
</span><span class="cx">                 2B4235A015250F6000DBBCD8 /* RenderSVGEllipse.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = RenderSVGEllipse.h; sourceTree = &quot;&lt;group&gt;&quot;; };
</span><span class="cx">                 2BE8E2C612A589EC00FAD550 /* HTMLMetaCharsetParser.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = HTMLMetaCharsetParser.h; path = parser/HTMLMetaCharsetParser.h; sourceTree = &quot;&lt;group&gt;&quot;; };
</span><span class="cx">                 2BE8E2C812A58A0100FAD550 /* HTMLMetaCharsetParser.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; name = HTMLMetaCharsetParser.cpp; path = parser/HTMLMetaCharsetParser.cpp; sourceTree = &quot;&lt;group&gt;&quot;; };
</span><ins>+                2D0B4AA918DA1CCD00434DE1 /* IOSurface.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = IOSurface.h; sourceTree = &quot;&lt;group&gt;&quot;; };
+                2D0B4AAA18DA1CCD00434DE1 /* IOSurface.mm */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.objcpp; path = IOSurface.mm; sourceTree = &quot;&lt;group&gt;&quot;; };
</ins><span class="cx">                 2D25396018CE7F6200270222 /* ImageControlsButtonElementMac.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = ImageControlsButtonElementMac.cpp; sourceTree = &quot;&lt;group&gt;&quot;; };
</span><span class="cx">                 2D25396118CE7F6200270222 /* ImageControlsButtonElementMac.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ImageControlsButtonElementMac.h; sourceTree = &quot;&lt;group&gt;&quot;; };
</span><span class="cx">                 2D2FC0541460CD6F00263633 /* CrossfadeGeneratedImage.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = CrossfadeGeneratedImage.cpp; sourceTree = &quot;&lt;group&gt;&quot;; };
</span><span class="lines">@@ -20243,6 +20247,8 @@
</span><span class="cx">                 B5320D68122A24E9002D1440 /* cocoa */ = {
</span><span class="cx">                         isa = PBXGroup;
</span><span class="cx">                         children = (
</span><ins>+                                2D0B4AA918DA1CCD00434DE1 /* IOSurface.h */,
+                                2D0B4AAA18DA1CCD00434DE1 /* IOSurface.mm */,
</ins><span class="cx">                                 B5320D6A122A24E9002D1440 /* FontPlatformDataCocoa.mm */,
</span><span class="cx">                         );
</span><span class="cx">                         path = cocoa;
</span><span class="lines">@@ -23016,6 +23022,7 @@
</span><span class="cx">                                 B2C3DA2A0D006C1D00EF6F26 /* CharsetData.h in Headers */,
</span><span class="cx">                                 F55B3DB21251F12D003EF269 /* CheckboxInputType.h in Headers */,
</span><span class="cx">                                 93F925430F7EF5B8007E37C9 /* CheckedRadioButtons.h in Headers */,
</span><ins>+                                2D0B4AAB18DA1CCD00434DE1 /* IOSurface.h in Headers */,
</ins><span class="cx">                                 D619A308144E00BE004BC302 /* ChildListMutationScope.h in Headers */,
</span><span class="cx">                                 A81872200977D3C0005826D9 /* ChildNodeList.h in Headers */,
</span><span class="cx">                                 14D823520AF92A790004F057 /* Chrome.h in Headers */,
</span><span class="lines">@@ -27081,6 +27088,7 @@
</span><span class="cx">                                 BC53DA481143134D000D817E /* DOMWrapperWorld.cpp in Sources */,
</span><span class="cx">                                 1A1D13810A5325520064BF5F /* DOMXPath.mm in Sources */,
</span><span class="cx">                                 85E9E0A20AB3A0C700069CD0 /* DOMXPathExpression.mm in Sources */,
</span><ins>+                                2D0B4AAC18DA1CCD00434DE1 /* IOSurface.mm in Sources */,
</ins><span class="cx">                                 85E9E0A60AB3A0C700069CD0 /* DOMXPathResult.mm in Sources */,
</span><span class="cx">                                 FD1762E3176686EA00D836A8 /* DownSampler.cpp in Sources */,
</span><span class="cx">                                 A7CA595E0B27BD9E00FA021D /* DragController.cpp in Sources */,
</span></span></pre></div>
<a id="trunkSourceWebCoreplatformgraphicscgColorCGcpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/platform/graphics/cg/ColorCG.cpp (166004 => 166005)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/platform/graphics/cg/ColorCG.cpp        2014-03-20 21:53:03 UTC (rev 166004)
+++ trunk/Source/WebCore/platform/graphics/cg/ColorCG.cpp        2014-03-20 22:06:38 UTC (rev 166005)
</span><span class="lines">@@ -107,20 +107,6 @@
</span><span class="cx">     m_valid = true;
</span><span class="cx"> }
</span><span class="cx"> 
</span><del>-static inline CGColorSpaceRef cachedCGColorSpace(ColorSpace colorSpace)
-{
-    switch (colorSpace) {
-    case ColorSpaceDeviceRGB:
-        return deviceRGBColorSpaceRef();
-    case ColorSpaceSRGB:
-        return sRGBColorSpaceRef();
-    case ColorSpaceLinearRGB:
-        return linearRGBColorSpaceRef();
-    }
-    ASSERT_NOT_REACHED();
-    return deviceRGBColorSpaceRef();
-}
-
</del><span class="cx"> static CGColorRef leakCGColor(const Color&amp; color, ColorSpace colorSpace)
</span><span class="cx"> {
</span><span class="cx">     CGFloat components[4];
</span></span></pre></div>
<a id="trunkSourceWebCoreplatformgraphicscgGraphicsContextCGh"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/platform/graphics/cg/GraphicsContextCG.h (166004 => 166005)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/platform/graphics/cg/GraphicsContextCG.h        2014-03-20 21:53:03 UTC (rev 166004)
+++ trunk/Source/WebCore/platform/graphics/cg/GraphicsContextCG.h        2014-03-20 22:06:38 UTC (rev 166005)
</span><span class="lines">@@ -36,6 +36,20 @@
</span><span class="cx"> CGColorSpaceRef sRGBColorSpaceRef();
</span><span class="cx"> CGColorSpaceRef linearRGBColorSpaceRef();
</span><span class="cx"> 
</span><ins>+static inline CGColorSpaceRef cachedCGColorSpace(ColorSpace colorSpace)
+{
+    switch (colorSpace) {
+    case ColorSpaceDeviceRGB:
+        return deviceRGBColorSpaceRef();
+    case ColorSpaceSRGB:
+        return sRGBColorSpaceRef();
+    case ColorSpaceLinearRGB:
+        return linearRGBColorSpaceRef();
+    }
+    ASSERT_NOT_REACHED();
+    return deviceRGBColorSpaceRef();
</ins><span class="cx"> }
</span><span class="cx"> 
</span><ins>+}
+
</ins><span class="cx"> #endif
</span></span></pre></div>
<a id="trunkSourceWebCoreplatformgraphicscgImageBufferBackingStoreCachecpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/platform/graphics/cg/ImageBufferBackingStoreCache.cpp (166004 => 166005)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/platform/graphics/cg/ImageBufferBackingStoreCache.cpp        2014-03-20 21:53:03 UTC (rev 166004)
+++ trunk/Source/WebCore/platform/graphics/cg/ImageBufferBackingStoreCache.cpp        2014-03-20 22:06:38 UTC (rev 166005)
</span><span class="lines">@@ -34,6 +34,7 @@
</span><span class="cx"> 
</span><span class="cx"> namespace WebCore {
</span><span class="cx"> 
</span><ins>+// FIXME: Adopt WebCore::IOSurface.
</ins><span class="cx"> static RetainPtr&lt;IOSurfaceRef&gt; createIOSurface(const IntSize&amp; size)
</span><span class="cx"> {
</span><span class="cx">     unsigned pixelFormat = 'BGRA';
</span></span></pre></div>
<a id="trunkSourceWebCoreplatformgraphicscgImageBufferCGcpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/platform/graphics/cg/ImageBufferCG.cpp (166004 => 166005)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/platform/graphics/cg/ImageBufferCG.cpp        2014-03-20 21:53:03 UTC (rev 166004)
+++ trunk/Source/WebCore/platform/graphics/cg/ImageBufferCG.cpp        2014-03-20 22:06:38 UTC (rev 166005)
</span><span class="lines">@@ -63,6 +63,7 @@
</span><span class="cx"> static const int maxIOSurfaceDimension = 4096;
</span><span class="cx"> #endif
</span><span class="cx"> 
</span><ins>+// FIXME: Adopt WebCore::IOSurface.
</ins><span class="cx"> static RetainPtr&lt;IOSurfaceRef&gt; createIOSurface(const IntSize&amp; size)
</span><span class="cx"> {
</span><span class="cx">     unsigned pixelFormat = 'BGRA';
</span></span></pre></div>
<a id="trunkSourceWebCoreplatformgraphicscocoaIOSurfaceh"></a>
<div class="addfile"><h4>Added: trunk/Source/WebCore/platform/graphics/cocoa/IOSurface.h (0 => 166005)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/platform/graphics/cocoa/IOSurface.h                                (rev 0)
+++ trunk/Source/WebCore/platform/graphics/cocoa/IOSurface.h        2014-03-20 22:06:38 UTC (rev 166005)
</span><span class="lines">@@ -0,0 +1,94 @@
</span><ins>+/*
+ * Copyright (C) 2014 Apple Inc. All rights reserved.
+ *
+ * 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. ``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
+ * 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.
+ */
+
+#ifndef IOSurface_h
+#define IOSurface_h
+
+#if USE(IOSURFACE)
+
+#include &quot;GraphicsContext.h&quot;
+#include &quot;IntSize.h&quot;
+#include &lt;wtf/PassRefPtr.h&gt;
+#include &lt;wtf/RefCounted.h&gt;
+
+namespace WebCore {
+
+class IOSurface final : public RefCounted&lt;IOSurface&gt; {
+public:
+    static PassRefPtr&lt;IOSurface&gt; create(IntSize, ColorSpace);
+    static PassRefPtr&lt;IOSurface&gt; createFromMachPort(mach_port_t, ColorSpace);
+    static PassRefPtr&lt;IOSurface&gt; createFromSurface(IOSurfaceRef, ColorSpace);
+
+    static IntSize maximumSize();
+
+    mach_port_t createMachPort() const;
+
+    // Any images created from a surface need to be released before releasing
+    // the surface, or an expensive GPU readback can result.
+    RetainPtr&lt;CGImageRef&gt; createImage() const;
+
+    IOSurfaceRef surface() const { return m_surface.get(); }
+    GraphicsContext&amp; ensureGraphicsContext();
+    CGContextRef ensurePlatformContext();
+
+    enum class SurfaceState {
+        Valid,
+        Empty
+    };
+
+    // Querying purgeability state can be expensive, so in cases where the surface is
+    // going to be used immediately, use the return value of setIsPurgeable to
+    // determine whether the data was purged, instead of first calling state() or isPurgeable().
+    SurfaceState state() const;
+    bool isPurgeable() const;
+
+    // setIsPurgeable only has an effect on iOS and OS 10.9 and above.
+    SurfaceState setIsPurgeable(bool);
+
+    IntSize size() const { return m_size; }
+    size_t totalBytes() const { return m_totalBytes; }
+    ColorSpace colorSpace() const { return m_colorSpace; }
+
+    bool inUse() const;
+
+private:
+    IOSurface(IntSize, ColorSpace);
+    IOSurface(IOSurfaceRef, ColorSpace);
+
+    ColorSpace m_colorSpace;
+    IntSize m_size;
+    size_t m_totalBytes;
+
+    OwnPtr&lt;GraphicsContext&gt; m_graphicsContext;
+    RetainPtr&lt;CGContextRef&gt; m_cgContext;
+
+    RetainPtr&lt;IOSurfaceRef&gt; m_surface;
+};
+
+} // namespace WebCore
+
+#endif // USE(IOSURFACE)
+
+#endif // IOSurface_h
</ins></span></pre></div>
<a id="trunkSourceWebCoreplatformgraphicscocoaIOSurfacemm"></a>
<div class="addfile"><h4>Added: trunk/Source/WebCore/platform/graphics/cocoa/IOSurface.mm (0 => 166005)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/platform/graphics/cocoa/IOSurface.mm                                (rev 0)
+++ trunk/Source/WebCore/platform/graphics/cocoa/IOSurface.mm        2014-03-20 22:06:38 UTC (rev 166005)
</span><span class="lines">@@ -0,0 +1,189 @@
</span><ins>+/*
+ * Copyright (C) 2014 Apple Inc. All rights reserved.
+ *
+ * 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. ``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
+ * 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.
+ */
+
+#import &quot;config.h&quot;
+#import &quot;IOSurface.h&quot;
+
+#if USE(IOSURFACE)
+
+#import &quot;GraphicsContextCG.h&quot;
+#import &lt;IOSurface/IOSurface.h&gt;
+#import &lt;wtf/Assertions.h&gt;
+
+#if __has_include(&lt;IOSurface/IOSurfacePrivate.h&gt;)
+#import &lt;IOSurface/IOSurfacePrivate.h&gt;
+#else
+enum {
+    kIOSurfacePurgeableNonVolatile = 0,
+    kIOSurfacePurgeableVolatile = 1,
+    kIOSurfacePurgeableEmpty = 2,
+    kIOSurfacePurgeableKeepCurrent = 3,
+};
+#endif
+
+extern &quot;C&quot; {
+CGContextRef CGIOSurfaceContextCreate(IOSurfaceRef, size_t, size_t, size_t, size_t, CGColorSpaceRef, CGBitmapInfo);
+CGImageRef CGIOSurfaceContextCreateImage(CGContextRef);
+IOReturn IOSurfaceSetPurgeable(IOSurfaceRef, uint32_t, uint32_t *);
+}
+
+using namespace WebCore;
+
+PassRefPtr&lt;IOSurface&gt; IOSurface::create(IntSize size, ColorSpace colorSpace)
+{
+    return adoptRef(new IOSurface(size, colorSpace));
+}
+
+PassRefPtr&lt;IOSurface&gt; IOSurface::createFromMachPort(mach_port_t machPort, ColorSpace colorSpace)
+{
+    RetainPtr&lt;IOSurfaceRef&gt; surface = adoptCF(IOSurfaceLookupFromMachPort(machPort));
+    return IOSurface::createFromSurface(surface.get(), colorSpace);
+}
+
+PassRefPtr&lt;IOSurface&gt; IOSurface::createFromSurface(IOSurfaceRef surface, ColorSpace colorSpace)
+{
+    return adoptRef(new IOSurface(surface, colorSpace));
+}
+
+IOSurface::IOSurface(IntSize size, ColorSpace colorSpace)
+    : m_colorSpace(colorSpace)
+    , m_size(size)
+{
+    unsigned pixelFormat = 'BGRA';
+    unsigned bytesPerElement = 4;
+    int width = size.width();
+    int height = size.height();
+
+    size_t bytesPerRow = IOSurfaceAlignProperty(kIOSurfaceBytesPerRow, width * bytesPerElement);
+    ASSERT(bytesPerRow);
+
+    m_totalBytes = IOSurfaceAlignProperty(kIOSurfaceAllocSize, height * bytesPerRow);
+    ASSERT(m_totalBytes);
+
+    NSDictionary *options = @{
+        (id)kIOSurfaceWidth: @(width),
+        (id)kIOSurfaceHeight: @(height),
+        (id)kIOSurfacePixelFormat: @(pixelFormat),
+        (id)kIOSurfaceBytesPerElement: @(bytesPerElement),
+        (id)kIOSurfaceBytesPerRow: @(bytesPerRow),
+        (id)kIOSurfaceAllocSize: @(m_totalBytes)
+    };
+
+    m_surface = adoptCF(IOSurfaceCreate((CFDictionaryRef)options));
+}
+
+IOSurface::IOSurface(IOSurfaceRef surface, ColorSpace colorSpace)
+    : m_colorSpace(colorSpace)
+    , m_surface(surface)
+{
+    m_size = IntSize(IOSurfaceGetWidth(surface), IOSurfaceGetHeight(surface));
+    m_totalBytes = IOSurfaceGetAllocSize(surface);
+}
+
+IntSize IOSurface::maximumSize()
+{
+    return IntSize(IOSurfaceGetPropertyMaximum(kIOSurfaceWidth), IOSurfaceGetPropertyMaximum(kIOSurfaceHeight));
+}
+
+mach_port_t IOSurface::createMachPort() const
+{
+    return IOSurfaceCreateMachPort(m_surface.get());
+}
+
+RetainPtr&lt;CGImageRef&gt; IOSurface::createImage() const
+{
+    if (!m_cgContext)
+        return nullptr;
+
+    return adoptCF(CGIOSurfaceContextCreateImage(m_cgContext.get()));
+}
+
+CGContextRef IOSurface::ensurePlatformContext()
+{
+    if (m_cgContext)
+        return m_cgContext.get();
+
+    CGBitmapInfo bitmapInfo = kCGImageAlphaPremultipliedFirst | kCGBitmapByteOrder32Host;
+    size_t bitsPerComponent = 8;
+    size_t bitsPerPixel = 32;
+    m_cgContext = adoptCF(CGIOSurfaceContextCreate(m_surface.get(), m_size.width(), m_size.height(), bitsPerComponent, bitsPerPixel, cachedCGColorSpace(m_colorSpace), bitmapInfo));
+
+    return m_cgContext.get();
+}
+
+GraphicsContext&amp; IOSurface::ensureGraphicsContext()
+{
+    if (m_graphicsContext)
+        return *m_graphicsContext;
+
+    m_graphicsContext = adoptPtr(new GraphicsContext(ensurePlatformContext()));
+
+    return *m_graphicsContext;
+}
+
+IOSurface::SurfaceState IOSurface::state() const
+{
+#if PLATFORM(IOS) || __MAC_OS_X_VERSION_MIN_REQUIRED &gt;= 1090
+    uint32_t previousState = 0;
+    IOReturn ret = IOSurfaceSetPurgeable(m_surface.get(), kIOSurfacePurgeableKeepCurrent, &amp;previousState);
+    ASSERT_UNUSED(ret, ret == kIOReturnSuccess);
+    return previousState == kIOSurfacePurgeableEmpty ? IOSurface::SurfaceState::Empty : IOSurface::SurfaceState::Valid;
+#else
+    return SurfaceState::Valid;
+#endif
+}
+
+bool IOSurface::isPurgeable() const
+{
+#if PLATFORM(IOS) || __MAC_OS_X_VERSION_MIN_REQUIRED &gt;= 1090
+    uint32_t previousState = 0;
+    IOReturn ret = IOSurfaceSetPurgeable(m_surface.get(), kIOSurfacePurgeableKeepCurrent, &amp;previousState);
+    ASSERT_UNUSED(ret, ret == kIOReturnSuccess);
+    return previousState != kIOSurfacePurgeableNonVolatile;
+#else
+    return false;
+#endif
+}
+
+IOSurface::SurfaceState IOSurface::setIsPurgeable(bool isPurgeable)
+{
+#if PLATFORM(IOS) || __MAC_OS_X_VERSION_MIN_REQUIRED &gt;= 1090
+    uint32_t previousState = 0;
+    IOReturn ret = IOSurfaceSetPurgeable(m_surface.get(), isPurgeable ? kIOSurfacePurgeableVolatile : kIOSurfacePurgeableNonVolatile, &amp;previousState);
+    ASSERT_UNUSED(ret, ret == kIOReturnSuccess);
+
+    if (previousState == kIOSurfacePurgeableEmpty)
+        return IOSurface::SurfaceState::Empty;
+#endif
+
+    return IOSurface::SurfaceState::Valid;
+}
+
+bool IOSurface::inUse() const
+{
+    return IOSurfaceIsInUse(m_surface.get());
+}
+
+#endif // USE(IOSURFACE)
</ins></span></pre></div>
<a id="trunkSourceWebKit2ChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebKit2/ChangeLog (166004 => 166005)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebKit2/ChangeLog        2014-03-20 21:53:03 UTC (rev 166004)
+++ trunk/Source/WebKit2/ChangeLog        2014-03-20 22:06:38 UTC (rev 166005)
</span><span class="lines">@@ -1,3 +1,29 @@
</span><ins>+2014-03-20  Tim Horton  &lt;timothy_horton@apple.com&gt;
+
+        Add WebCore::IOSurface wrapper
+        https://bugs.webkit.org/show_bug.cgi?id=130529
+
+        Reviewed by Simon Fraser.
+
+        * Shared/mac/RemoteLayerBackingStore.h:
+        * Shared/mac/RemoteLayerBackingStore.mm:
+        (RemoteLayerBackingStore::encode):
+        (RemoteLayerBackingStore::decode):
+        (RemoteLayerBackingStore::display):
+        (RemoteLayerBackingStore::applyBackingStoreToLayer):
+        * UIProcess/ios/ViewGestureControllerIOS.mm:
+        (WebKit::ViewGestureController::beginSwipeGesture):
+        (WebKit::ViewGestureController::removeSwipeSnapshot):
+        * UIProcess/mac/ViewGestureController.h:
+        * UIProcess/mac/ViewGestureControllerMac.mm:
+        (WebKit::ViewGestureController::beginSwipeGesture):
+        (WebKit::ViewGestureController::removeSwipeSnapshot):
+        * UIProcess/mac/ViewSnapshotStore.h:
+        * UIProcess/mac/ViewSnapshotStore.mm:
+        (WebKit::createIOSurfaceFromImage):
+        (WebKit::ViewSnapshotStore::recordSnapshot):
+        Adopt WebCore::IOSurface.
+
</ins><span class="cx"> 2014-03-20  Alexey Proskuryakov  &lt;ap@apple.com&gt;
</span><span class="cx"> 
</span><span class="cx">         Update iOS input method code to use new cross-platform async functions
</span></span></pre></div>
<a id="trunkSourceWebKit2SharedmacRemoteLayerBackingStoreh"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebKit2/Shared/mac/RemoteLayerBackingStore.h (166004 => 166005)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebKit2/Shared/mac/RemoteLayerBackingStore.h        2014-03-20 21:53:03 UTC (rev 166004)
+++ trunk/Source/WebKit2/Shared/mac/RemoteLayerBackingStore.h        2014-03-20 22:06:38 UTC (rev 166005)
</span><span class="lines">@@ -28,12 +28,9 @@
</span><span class="cx"> 
</span><span class="cx"> #include &quot;ShareableBitmap.h&quot;
</span><span class="cx"> #include &lt;WebCore/FloatRect.h&gt;
</span><ins>+#include &lt;WebCore/IOSurface.h&gt;
</ins><span class="cx"> #include &lt;WebCore/Region.h&gt;
</span><span class="cx"> 
</span><del>-#if USE(IOSURFACE)
-#include &lt;IOSurface/IOSurface.h&gt;
-#endif
-
</del><span class="cx"> OBJC_CLASS CALayer;
</span><span class="cx"> 
</span><span class="cx"> // FIXME: Make PlatformCALayerRemote.cpp Objective-C so we can include WebLayer.h here and share the typedef.
</span><span class="lines">@@ -93,7 +90,7 @@
</span><span class="cx"> 
</span><span class="cx">     RefPtr&lt;ShareableBitmap&gt; m_frontBuffer;
</span><span class="cx"> #if USE(IOSURFACE)
</span><del>-    RetainPtr&lt;IOSurfaceRef&gt; m_frontSurface;
</del><ins>+    RefPtr&lt;WebCore::IOSurface&gt; m_frontSurface;
</ins><span class="cx"> #endif
</span><span class="cx"> 
</span><span class="cx">     bool m_acceleratesDrawing;
</span></span></pre></div>
<a id="trunkSourceWebKit2SharedmacRemoteLayerBackingStoremm"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebKit2/Shared/mac/RemoteLayerBackingStore.mm (166004 => 166005)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebKit2/Shared/mac/RemoteLayerBackingStore.mm        2014-03-20 21:53:03 UTC (rev 166004)
+++ trunk/Source/WebKit2/Shared/mac/RemoteLayerBackingStore.mm        2014-03-20 22:06:38 UTC (rev 166005)
</span><span class="lines">@@ -33,23 +33,13 @@
</span><span class="cx"> #import &quot;WebCoreArgumentCoders.h&quot;
</span><span class="cx"> #import &lt;QuartzCore/QuartzCore.h&gt;
</span><span class="cx"> #import &lt;WebCore/GraphicsContextCG.h&gt;
</span><ins>+#import &lt;WebCore/IOSurface.h&gt;
</ins><span class="cx"> #import &lt;WebCore/WebLayer.h&gt;
</span><span class="cx"> 
</span><span class="cx"> #if USE(IOSURFACE)
</span><span class="cx"> #import &lt;mach/mach_port.h&gt;
</span><span class="cx"> #endif
</span><span class="cx"> 
</span><del>-#if __has_include(&lt;ApplicationServices/ApplicationServicesPriv.h&gt;)
-#import &lt;ApplicationServices/ApplicationServicesPriv.h&gt;
-#endif
-
-extern &quot;C&quot; {
-#if USE(IOSURFACE)
-CGContextRef CGIOSurfaceContextCreate(IOSurfaceRef, size_t, size_t, size_t, size_t, CGColorSpaceRef, CGBitmapInfo);
-#endif
-CGImageRef CGIOSurfaceContextCreateImage(CGContextRef);
-}
-
</del><span class="cx"> #if __has_include(&lt;QuartzCore/CALayerPrivate.h&gt;)
</span><span class="cx"> #import &lt;QuartzCore/CALayerPrivate.h&gt;
</span><span class="cx"> #endif
</span><span class="lines">@@ -93,7 +83,7 @@
</span><span class="cx"> 
</span><span class="cx"> #if USE(IOSURFACE)
</span><span class="cx">     if (m_acceleratesDrawing) {
</span><del>-        mach_port_t port = IOSurfaceCreateMachPort(m_frontSurface.get());
</del><ins>+        mach_port_t port = m_frontSurface-&gt;createMachPort();
</ins><span class="cx">         encoder &lt;&lt; IPC::MachPort(port, MACH_MSG_TYPE_MOVE_SEND);
</span><span class="cx">         return;
</span><span class="cx">     }
</span><span class="lines">@@ -125,7 +115,7 @@
</span><span class="cx">         IPC::MachPort machPort;
</span><span class="cx">         if (!decoder.decode(machPort))
</span><span class="cx">             return false;
</span><del>-        result.m_frontSurface = adoptCF(IOSurfaceLookupFromMachPort(machPort.port()));
</del><ins>+        result.m_frontSurface = IOSurface::createFromMachPort(machPort.port(), ColorSpaceDeviceRGB);
</ins><span class="cx">         mach_port_deallocate(mach_task_self(), machPort.port());
</span><span class="cx">         return true;
</span><span class="cx">     }
</span><span class="lines">@@ -151,44 +141,6 @@
</span><span class="cx">     setNeedsDisplay(IntRect(IntPoint(), m_size));
</span><span class="cx"> }
</span><span class="cx"> 
</span><del>-#if USE(IOSURFACE)
-static RetainPtr&lt;CGContextRef&gt; createIOSurfaceContext(IOSurfaceRef surface, IntSize size, CGColorSpaceRef colorSpace)
-{
-    if (!surface)
-        return nullptr;
-
-    CGBitmapInfo bitmapInfo = kCGImageAlphaPremultipliedFirst | kCGBitmapByteOrder32Host;
-    size_t bitsPerComponent = 8;
-    size_t bitsPerPixel = 32;
-    return adoptCF(CGIOSurfaceContextCreate(surface, size.width(), size.height(), bitsPerComponent, bitsPerPixel, colorSpace, bitmapInfo));
-}
-
-static RetainPtr&lt;IOSurfaceRef&gt; createIOSurface(IntSize size)
-{
-    unsigned pixelFormat = 'BGRA';
-    unsigned bytesPerElement = 4;
-    int width = size.width();
-    int height = size.height();
-
-    size_t bytesPerRow = IOSurfaceAlignProperty(kIOSurfaceBytesPerRow, width * bytesPerElement);
-    ASSERT(bytesPerRow);
-
-    size_t allocSize = IOSurfaceAlignProperty(kIOSurfaceAllocSize, height * bytesPerRow);
-    ASSERT(allocSize);
-
-    NSDictionary *dict = @{
-        (id)kIOSurfaceWidth: @(width),
-        (id)kIOSurfaceHeight: @(height),
-        (id)kIOSurfacePixelFormat: @(pixelFormat),
-        (id)kIOSurfaceBytesPerElement: @(bytesPerElement),
-        (id)kIOSurfaceBytesPerRow: @(bytesPerRow),
-        (id)kIOSurfaceAllocSize: @(allocSize)
-    };
-
-    return adoptCF(IOSurfaceCreate((CFDictionaryRef)dict));
-}
-#endif // USE(IOSURFACE)
-
</del><span class="cx"> RetainPtr&lt;CGImageRef&gt; RemoteLayerBackingStore::createImageForFrontBuffer() const
</span><span class="cx"> {
</span><span class="cx">     if (!m_frontBuffer || m_acceleratesDrawing)
</span><span class="lines">@@ -233,30 +185,22 @@
</span><span class="cx"> 
</span><span class="cx"> #if USE(IOSURFACE)
</span><span class="cx">     if (m_acceleratesDrawing) {
</span><del>-        RetainPtr&lt;IOSurfaceRef&gt; backSurface = createIOSurface(expandedScaledSize);
-        RetainPtr&lt;CGContextRef&gt; cgContext = createIOSurfaceContext(backSurface.get(), expandedScaledSize, sRGBColorSpaceRef());
-        GraphicsContext context(cgContext.get());
</del><ins>+        RefPtr&lt;IOSurface&gt; backSurface = IOSurface::create(expandedScaledSize, ColorSpaceDeviceRGB);
+        GraphicsContext&amp; context = backSurface-&gt;ensureGraphicsContext();
</ins><span class="cx">         context.clearRect(FloatRect(FloatPoint(), expandedScaledSize));
</span><span class="cx">         context.scale(FloatSize(1, -1));
</span><span class="cx">         context.translate(0, -expandedScaledSize.height());
</span><span class="cx"> 
</span><del>-        RetainPtr&lt;CGContextRef&gt; frontContext;
</del><span class="cx">         RetainPtr&lt;CGImageRef&gt; frontImage;
</span><del>-        if (m_frontSurface) {
-            frontContext = createIOSurfaceContext(m_frontSurface.get(), expandedIntSize(m_size * m_scale), sRGBColorSpaceRef());
-            frontImage = adoptCF(CGIOSurfaceContextCreateImage(frontContext.get()));
-        }
-
</del><ins>+        if (m_frontSurface)
+            frontImage = m_frontSurface-&gt;createImage();
</ins><span class="cx">         drawInContext(context, frontImage.get());
</span><del>-        m_frontSurface = backSurface;
</del><span class="cx"> 
</span><span class="cx">         // If our frontImage is derived from an IOSurface, we need to
</span><span class="cx">         // destroy the image before the CGContext it's derived from,
</span><span class="cx">         // so that the context doesn't make a CPU copy of the surface data.
</span><del>-        if (frontImage) {
-            frontImage = nullptr;
-            ASSERT(frontContext);
-        }
</del><ins>+        frontImage = nullptr;
+        m_frontSurface = backSurface;
</ins><span class="cx"> 
</span><span class="cx">         return true;
</span><span class="cx">     }
</span><span class="lines">@@ -367,7 +311,7 @@
</span><span class="cx"> {
</span><span class="cx"> #if USE(IOSURFACE)
</span><span class="cx">     if (acceleratesDrawing())
</span><del>-        layer.contents = (id)m_frontSurface.get();
</del><ins>+        layer.contents = (id)m_frontSurface-&gt;surface();
</ins><span class="cx">     else
</span><span class="cx">         layer.contents = (id)createImageForFrontBuffer().get();
</span><span class="cx"> #else
</span></span></pre></div>
<a id="trunkSourceWebKit2UIProcessiosViewGestureControllerIOSmm"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebKit2/UIProcess/ios/ViewGestureControllerIOS.mm (166004 => 166005)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebKit2/UIProcess/ios/ViewGestureControllerIOS.mm        2014-03-20 21:53:03 UTC (rev 166004)
+++ trunk/Source/WebKit2/UIProcess/ios/ViewGestureControllerIOS.mm        2014-03-20 22:06:38 UTC (rev 166005)
</span><span class="lines">@@ -36,6 +36,7 @@
</span><span class="cx"> #import &quot;WebPageMessages.h&quot;
</span><span class="cx"> #import &quot;WebPageProxy.h&quot;
</span><span class="cx"> #import &quot;WebProcessProxy.h&quot;
</span><ins>+#import &lt;WebCore/IOSurface.h&gt;
</ins><span class="cx"> #import &lt;QuartzCore/QuartzCore.h&gt;
</span><span class="cx"> #import &lt;UIKit/UIScreenEdgePanGestureRecognizer.h&gt;
</span><span class="cx"> #import &lt;UIKit/UIViewControllerTransitioning_Private.h&gt;
</span><span class="lines">@@ -43,11 +44,6 @@
</span><span class="cx"> #import &lt;UIKit/_UINavigationInteractiveTransition.h&gt;
</span><span class="cx"> #import &lt;UIKit/_UINavigationParallaxTransition.h&gt;
</span><span class="cx"> 
</span><del>-#if USE(IOSURFACE)
-#import &lt;IOSurface/IOSurface.h&gt;
-#import &lt;IOSurface/IOSurfacePrivate.h&gt;
-#endif
-
</del><span class="cx"> using namespace WebCore;
</span><span class="cx"> 
</span><span class="cx"> @interface WKSwipeTransitionController : NSObject &lt;_UINavigationInteractiveTransitionBaseDelegate&gt;
</span><span class="lines">@@ -161,11 +157,10 @@
</span><span class="cx">     m_snapshotView = adoptNS([[UIView alloc] initWithFrame:[m_liveSwipeView frame]]);
</span><span class="cx">     if (snapshot) {
</span><span class="cx"> #if USE(IOSURFACE)
</span><del>-        uint32_t purgeabilityState = kIOSurfacePurgeableNonVolatile;
-        IOSurfaceSetPurgeable(snapshot.get(), kIOSurfacePurgeableNonVolatile, &amp;purgeabilityState);
-        
-        if (purgeabilityState != kIOSurfacePurgeableEmpty)
</del><ins>+        if (snapshot-&gt;setIsPurgeable(false) == IOSurface::SurfaceState::Valid) {
</ins><span class="cx">             [m_snapshotView layer].contents = (id)snapshot.get();
</span><ins>+            m_currentSwipeSnapshotSurface = snapshot;
+        }
</ins><span class="cx"> #else
</span><span class="cx">         [m_snapshotView layer].contents = (id)snapshot.get();
</span><span class="cx"> #endif
</span><span class="lines">@@ -268,9 +263,9 @@
</span><span class="cx">         return;
</span><span class="cx">     
</span><span class="cx"> #if USE(IOSURFACE)
</span><del>-    IOSurfaceRef snapshotSurface = (IOSurfaceRef)[m_snapshotView layer].contents;
-    if (snapshotSurface)
-        IOSurfaceSetPurgeable(snapshotSurface, kIOSurfacePurgeableVolatile, nullptr);
</del><ins>+    if (m_currentSwipeSnapshotSurface)
+        m_currentSwipeSnapshotSurface-&gt;setIsPurgeable(true);
+    m_currentSwipeSnapshotSurface = nullptr;
</ins><span class="cx"> #endif
</span><span class="cx">     
</span><span class="cx">     [m_snapshotView removeFromSuperview];
</span></span></pre></div>
<a id="trunkSourceWebKit2UIProcessmacViewGestureControllerh"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebKit2/UIProcess/mac/ViewGestureController.h (166004 => 166005)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebKit2/UIProcess/mac/ViewGestureController.h        2014-03-20 21:53:03 UTC (rev 166004)
+++ trunk/Source/WebKit2/UIProcess/mac/ViewGestureController.h        2014-03-20 22:06:38 UTC (rev 166005)
</span><span class="lines">@@ -43,6 +43,10 @@
</span><span class="cx"> OBJC_CLASS NSView;
</span><span class="cx"> #endif
</span><span class="cx"> 
</span><ins>+namespace WebCore {
+class IOSurface;
+}
+
</ins><span class="cx"> namespace WebKit {
</span><span class="cx"> 
</span><span class="cx"> class WebBackForwardListItem;
</span><span class="lines">@@ -121,6 +125,10 @@
</span><span class="cx">     
</span><span class="cx">     WebCore::Timer&lt;ViewGestureController&gt; m_swipeWatchdogTimer;
</span><span class="cx"> 
</span><ins>+#if USE(IOSURFACE)
+    RefPtr&lt;WebCore::IOSurface&gt; m_currentSwipeSnapshotSurface;
+#endif
+
</ins><span class="cx"> #if !PLATFORM(IOS)
</span><span class="cx">     double m_magnification;
</span><span class="cx">     WebCore::FloatPoint m_magnificationOrigin;
</span></span></pre></div>
<a id="trunkSourceWebKit2UIProcessmacViewGestureControllerMacmm"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebKit2/UIProcess/mac/ViewGestureControllerMac.mm (166004 => 166005)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebKit2/UIProcess/mac/ViewGestureControllerMac.mm        2014-03-20 21:53:03 UTC (rev 166004)
+++ trunk/Source/WebKit2/UIProcess/mac/ViewGestureControllerMac.mm        2014-03-20 22:06:38 UTC (rev 166005)
</span><span class="lines">@@ -40,22 +40,9 @@
</span><span class="cx"> #import &quot;WebProcessProxy.h&quot;
</span><span class="cx"> #import &lt;Cocoa/Cocoa.h&gt;
</span><span class="cx"> #import &lt;QuartzCore/QuartzCore.h&gt;
</span><ins>+#import &lt;WebCore/IOSurface.h&gt;
</ins><span class="cx"> #import &lt;WebCore/WebCoreCALayerExtras.h&gt;
</span><span class="cx"> 
</span><del>-#if defined(__has_include) &amp;&amp; __has_include(&lt;IOSurface/IOSurfacePrivate.h&gt;)
-#import &lt;IOSurface/IOSurfacePrivate.h&gt;
-#else
-enum {
-    kIOSurfacePurgeableNonVolatile = 0,
-    kIOSurfacePurgeableVolatile = 1,
-    kIOSurfacePurgeableEmpty = 2,
-};
-#endif
-
-#if __MAC_OS_X_VERSION_MIN_REQUIRED &gt;= 1090
-extern &quot;C&quot; IOReturn IOSurfaceSetPurgeable(IOSurfaceRef buffer, uint32_t newState, uint32_t *oldState);
-#endif
-
</del><span class="cx"> #if defined(__has_include) &amp;&amp; __has_include(&lt;QuartzCore/QuartzCorePrivate.h&gt;)
</span><span class="cx"> #import &lt;QuartzCore/QuartzCorePrivate.h&gt;
</span><span class="cx"> #else
</span><span class="lines">@@ -373,18 +360,11 @@
</span><span class="cx">     m_swipeSnapshotLayer = adoptNS([[CALayer alloc] init]);
</span><span class="cx">     [m_swipeSnapshotLayer setBackgroundColor:CGColorGetConstantColor(kCGColorWhite)];
</span><span class="cx"> 
</span><del>-    RetainPtr&lt;IOSurfaceRef&gt; snapshot = ViewSnapshotStore::shared().snapshotAndRenderTreeSize(targetItem).first;
</del><ins>+    RefPtr&lt;IOSurface&gt; snapshot = ViewSnapshotStore::shared().snapshotAndRenderTreeSize(targetItem).first;
</ins><span class="cx"> 
</span><del>-    if (snapshot) {
-#if __MAC_OS_X_VERSION_MIN_REQUIRED &gt;= 1090
-        uint32_t purgeabilityState = kIOSurfacePurgeableNonVolatile;
-        IOSurfaceSetPurgeable(snapshot.get(), kIOSurfacePurgeableNonVolatile, &amp;purgeabilityState);
-
-        if (purgeabilityState != kIOSurfacePurgeableEmpty)
-            [m_swipeSnapshotLayer setContents:(id)snapshot.get()];
-#else
-        [m_swipeSnapshotLayer setContents:(id)snapshot.get()];
-#endif
</del><ins>+    if (snapshot &amp;&amp; snapshot-&gt;setIsPurgeable(false) == IOSurface::SurfaceState::Valid) {
+        m_currentSwipeSnapshotSurface = snapshot;
+        [m_swipeSnapshotLayer setContents:(id)snapshot-&gt;surface()];
</ins><span class="cx">     }
</span><span class="cx"> 
</span><span class="cx">     m_currentSwipeCustomViewBounds = windowRelativeBoundsForCustomSwipeViews();
</span><span class="lines">@@ -530,11 +510,9 @@
</span><span class="cx">     if (m_activeGestureType != ViewGestureType::Swipe)
</span><span class="cx">         return;
</span><span class="cx"> 
</span><del>-#if __MAC_OS_X_VERSION_MIN_REQUIRED &gt;= 1090
-    IOSurfaceRef snapshotSurface = (IOSurfaceRef)[m_swipeSnapshotLayer contents];
-    if (snapshotSurface)
-        IOSurfaceSetPurgeable(snapshotSurface, kIOSurfacePurgeableVolatile, nullptr);
-#endif
</del><ins>+    if (m_currentSwipeSnapshotSurface)
+        m_currentSwipeSnapshotSurface-&gt;setIsPurgeable(true);
+    m_currentSwipeSnapshotSurface = nullptr;
</ins><span class="cx"> 
</span><span class="cx">     for (const auto&amp; layer : m_currentSwipeLiveLayers)
</span><span class="cx">         [layer setTransform:CATransform3DIdentity];
</span></span></pre></div>
<a id="trunkSourceWebKit2UIProcessmacViewSnapshotStoreh"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebKit2/UIProcess/mac/ViewSnapshotStore.h (166004 => 166005)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebKit2/UIProcess/mac/ViewSnapshotStore.h        2014-03-20 21:53:03 UTC (rev 166004)
+++ trunk/Source/WebKit2/UIProcess/mac/ViewSnapshotStore.h        2014-03-20 22:06:38 UTC (rev 166005)
</span><span class="lines">@@ -26,16 +26,13 @@
</span><span class="cx"> #ifndef ViewSnapshotStore_h
</span><span class="cx"> #define ViewSnapshotStore_h
</span><span class="cx"> 
</span><ins>+#include &lt;WebCore/IOSurface.h&gt;
</ins><span class="cx"> #include &lt;chrono&gt;
</span><span class="cx"> #include &lt;wtf/HashMap.h&gt;
</span><span class="cx"> #include &lt;wtf/Noncopyable.h&gt;
</span><span class="cx"> #include &lt;wtf/RetainPtr.h&gt;
</span><span class="cx"> #include &lt;wtf/text/WTFString.h&gt;
</span><span class="cx"> 
</span><del>-#if USE(IOSURFACE)
-#include &lt;IOSurface/IOSurface.h&gt;
-#endif
-
</del><span class="cx"> namespace WebKit {
</span><span class="cx"> 
</span><span class="cx"> class WebBackForwardListItem;
</span><span class="lines">@@ -51,7 +48,7 @@
</span><span class="cx"> 
</span><span class="cx">     void recordSnapshot(WebPageProxy&amp;);
</span><span class="cx"> #if USE(IOSURFACE)
</span><del>-    std::pair&lt;RetainPtr&lt;IOSurfaceRef&gt;, uint64_t&gt; snapshotAndRenderTreeSize(WebBackForwardListItem*);
</del><ins>+    std::pair&lt;RefPtr&lt;WebCore::IOSurface&gt;, uint64_t&gt; snapshotAndRenderTreeSize(WebBackForwardListItem*);
</ins><span class="cx"> #else
</span><span class="cx">     std::pair&lt;RetainPtr&lt;CGImageRef&gt;, uint64_t&gt; snapshotAndRenderTreeSize(WebBackForwardListItem*);
</span><span class="cx"> #endif
</span><span class="lines">@@ -64,8 +61,7 @@
</span><span class="cx"> 
</span><span class="cx">     struct Snapshot {
</span><span class="cx"> #if USE(IOSURFACE)
</span><del>-        RetainPtr&lt;IOSurfaceRef&gt; surface;
-        RetainPtr&lt;CGContextRef&gt; surfaceContext;
</del><ins>+        RefPtr&lt;WebCore::IOSurface&gt; surface;
</ins><span class="cx"> #else
</span><span class="cx">         RetainPtr&lt;CGImageRef&gt; image;
</span><span class="cx"> #endif
</span></span></pre></div>
<a id="trunkSourceWebKit2UIProcessmacViewSnapshotStoremm"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebKit2/UIProcess/mac/ViewSnapshotStore.mm (166004 => 166005)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebKit2/UIProcess/mac/ViewSnapshotStore.mm        2014-03-20 21:53:03 UTC (rev 166004)
+++ trunk/Source/WebKit2/UIProcess/mac/ViewSnapshotStore.mm        2014-03-20 22:06:38 UTC (rev 166005)
</span><span class="lines">@@ -29,29 +29,9 @@
</span><span class="cx"> #import &quot;WebBackForwardList.h&quot;
</span><span class="cx"> #import &quot;WebPageProxy.h&quot;
</span><span class="cx"> #import &lt;CoreGraphics/CoreGraphics.h&gt;
</span><ins>+#import &lt;WebCore/IOSurface.h&gt;
</ins><span class="cx"> #import &lt;WebCore/UUID.h&gt;
</span><span class="cx"> 
</span><del>-#if defined(__has_include) &amp;&amp; __has_include(&lt;CoreGraphics/CoreGraphicsPrivate.h&gt;)
-#import &lt;CoreGraphics/CoreGraphicsPrivate.h&gt;
-#endif
-
-#if USE(IOSURFACE)
-#import &lt;IOSurface/IOSurface.h&gt;
-extern &quot;C&quot; CGContextRef CGIOSurfaceContextCreate(IOSurfaceRef surface, size_t width, size_t height, size_t bitsPerComponent, size_t bitsPerPixel, CGColorSpaceRef space, CGBitmapInfo bitmapInfo);
-
-#if defined(__has_include) &amp;&amp; __has_include(&lt;IOSurface/IOSurfacePrivate.h&gt;)
-#import &lt;IOSurface/IOSurfacePrivate.h&gt;
-#else
-enum {
-    kIOSurfacePurgeableVolatile = 1,
-};
-#endif
-
-#if PLATFORM(IOS) || __MAC_OS_X_VERSION_MIN_REQUIRED &gt;= 1090
-extern &quot;C&quot; IOReturn IOSurfaceSetPurgeable(IOSurfaceRef buffer, uint32_t newState, uint32_t *oldState);
-#endif
-#endif
-
</del><span class="cx"> using namespace WebCore;
</span><span class="cx"> 
</span><span class="cx"> static const int maximumSnapshotCount = 20;
</span><span class="lines">@@ -119,36 +99,17 @@
</span><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> #if USE(IOSURFACE)
</span><del>-static std::pair&lt;RetainPtr&lt;IOSurfaceRef&gt;, RetainPtr&lt;CGContextRef&gt;&gt; createIOSurfaceFromImage(CGImageRef image)
</del><ins>+static RefPtr&lt;IOSurface&gt; createIOSurfaceFromImage(CGImageRef image)
</ins><span class="cx"> {
</span><del>-    unsigned pixelFormat = 'BGRA';
-    size_t bitsPerComponent = 8;
-    size_t bitsPerPixel = 32;
-    size_t bytesPerElement = 4;
</del><span class="cx">     size_t width = CGImageGetWidth(image);
</span><span class="cx">     size_t height = CGImageGetHeight(image);
</span><del>-    size_t bytesPerRow = IOSurfaceAlignProperty(kIOSurfaceBytesPerRow, width * bytesPerElement);
-    ASSERT(bytesPerRow);
</del><span class="cx"> 
</span><del>-    size_t allocSize = IOSurfaceAlignProperty(kIOSurfaceAllocSize, height * bytesPerRow);
-    ASSERT(allocSize);
-
-    NSDictionary *properties = @{
-        (id)kIOSurfaceWidth: @(width),
-        (id)kIOSurfaceHeight: @(height),
-        (id)kIOSurfacePixelFormat: @(pixelFormat),
-        (id)kIOSurfaceBytesPerElement: @(bytesPerElement),
-        (id)kIOSurfaceBytesPerRow: @(bytesPerRow),
-        (id)kIOSurfaceAllocSize: @(allocSize)
-    };
-
-    RetainPtr&lt;IOSurfaceRef&gt; surface = adoptCF(IOSurfaceCreate((CFDictionaryRef)properties));
-    CGBitmapInfo bitmapInfo = kCGImageAlphaPremultipliedFirst | kCGBitmapByteOrder32Host;
-    RetainPtr&lt;CGContextRef&gt; surfaceContext = adoptCF(CGIOSurfaceContextCreate(surface.get(), width, height, bitsPerComponent, bitsPerPixel, CGImageGetColorSpace(image), bitmapInfo));
</del><ins>+    RefPtr&lt;IOSurface&gt; surface = IOSurface::create(IntSize(width, height), ColorSpaceDeviceRGB);
+    RetainPtr&lt;CGContextRef&gt; surfaceContext = surface-&gt;ensurePlatformContext();
</ins><span class="cx">     CGContextDrawImage(surfaceContext.get(), CGRectMake(0, 0, width, height), image);
</span><span class="cx">     CGContextFlush(surfaceContext.get());
</span><span class="cx"> 
</span><del>-    return std::make_pair(surface, surfaceContext);
</del><ins>+    return surface;
</ins><span class="cx"> }
</span><span class="cx"> #endif
</span><span class="cx"> 
</span><span class="lines">@@ -180,12 +141,8 @@
</span><span class="cx">     snapshot.creationTime = std::chrono::steady_clock::now();
</span><span class="cx"> 
</span><span class="cx"> #if USE(IOSURFACE)
</span><del>-    auto surfaceAndContext = createIOSurfaceFromImage(snapshotImage.get());
-    snapshot.surface = surfaceAndContext.first;
-    snapshot.surfaceContext = surfaceAndContext.second;
-#if PLATFORM(IOS) || __MAC_OS_X_VERSION_MIN_REQUIRED &gt;= 1090
-    IOSurfaceSetPurgeable(snapshot.surface.get(), kIOSurfacePurgeableVolatile, nullptr);
-#endif
</del><ins>+    snapshot.surface = createIOSurfaceFromImage(snapshotImage.get());
+    snapshot.surface-&gt;setIsPurgeable(true);
</ins><span class="cx"> #else
</span><span class="cx">     snapshot.image = snapshotImage;
</span><span class="cx"> #endif
</span><span class="lines">@@ -195,7 +152,7 @@
</span><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> #if USE(IOSURFACE)
</span><del>-std::pair&lt;RetainPtr&lt;IOSurfaceRef&gt;, uint64_t&gt; ViewSnapshotStore::snapshotAndRenderTreeSize(WebBackForwardListItem* item)
</del><ins>+std::pair&lt;RefPtr&lt;IOSurface&gt;, uint64_t&gt; ViewSnapshotStore::snapshotAndRenderTreeSize(WebBackForwardListItem* item)
</ins><span class="cx"> #else
</span><span class="cx"> std::pair&lt;RetainPtr&lt;CGImageRef&gt;, uint64_t&gt; ViewSnapshotStore::snapshotAndRenderTreeSize(WebBackForwardListItem* item)
</span><span class="cx"> #endif
</span></span></pre>
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