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<dt>Revision</dt> <dd><a href="http://trac.webkit.org/projects/webkit/changeset/175012">175012</a></dd>
<dt>Author</dt> <dd>dburkart@apple.com</dd>
<dt>Date</dt> <dd>2014-10-21 18:50:23 -0700 (Tue, 21 Oct 2014)</dd>
</dl>

<h3>Log Message</h3>
<pre>Merged <a href="http://trac.webkit.org/projects/webkit/changeset/174414">r174414</a></pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#branchessafari6002branchSourceWebCoreChangeLog">branches/safari-600.2-branch/Source/WebCore/ChangeLog</a></li>
<li><a href="#branchessafari6002branchSourceWebCorehtmlcanvasWebGLRenderingContextcpp">branches/safari-600.2-branch/Source/WebCore/html/canvas/WebGLRenderingContext.cpp</a></li>
<li><a href="#branchessafari6002branchSourceWebCoreplatformgraphicsGraphicsContext3Dh">branches/safari-600.2-branch/Source/WebCore/platform/graphics/GraphicsContext3D.h</a></li>
<li><a href="#branchessafari6002branchSourceWebCoreplatformgraphicsmacWebGLLayerh">branches/safari-600.2-branch/Source/WebCore/platform/graphics/mac/WebGLLayer.h</a></li>
<li><a href="#branchessafari6002branchSourceWebCoreplatformgraphicsmacWebGLLayermm">branches/safari-600.2-branch/Source/WebCore/platform/graphics/mac/WebGLLayer.mm</a></li>
</ul>

</div>
<div id="patch">
<h3>Diff</h3>
<a id="branchessafari6002branchSourceWebCoreChangeLog"></a>
<div class="modfile"><h4>Modified: branches/safari-600.2-branch/Source/WebCore/ChangeLog (175011 => 175012)</h4>
<pre class="diff"><span>
<span class="info">--- branches/safari-600.2-branch/Source/WebCore/ChangeLog        2014-10-22 01:47:15 UTC (rev 175011)
+++ branches/safari-600.2-branch/Source/WebCore/ChangeLog        2014-10-22 01:50:23 UTC (rev 175012)
</span><span class="lines">@@ -1,5 +1,42 @@
</span><span class="cx"> 2014-10-21  Dana Burkart  &lt;dburkart@apple.com&gt;
</span><span class="cx"> 
</span><ins>+        Merge r174414
+
+    2014-10-08  Dean Jackson  &lt;dino@apple.com&gt;
+
+            Safari 8 on OSX 10.10 does not run WebGL in Retina HiDPI mode.
+            https://bugs.webkit.org/show_bug.cgi?id=134854
+            &lt;rdar://problem/18465263&gt;
+
+            Reviewed by Tim Horton.
+
+            The NSOpenGLLayer has to have its contentScale property
+            set accordingly when on a retina display. Do this by
+            adding another value to the GraphicsContext3D creation
+            attribute dictionary, representing the device pixel ratio.
+            Then, when we come to draw into the layer, make sure
+            we set our GL viewport to the correct value.
+
+            This is currently untestable because:
+            - we can't just read from the GL buffer as it is always correct
+            - WebGL isn't working in reftests
+            - a layer dump doesn't show the change since it was done in a CALayer subclass.
+
+            * html/canvas/WebGLRenderingContext.cpp:
+            (WebCore::WebGLRenderingContext::create): Pass the devicePixelRatio into the attribute dictionary.
+            * platform/graphics/GraphicsContext3D.h:
+            (WebCore::GraphicsContext3D::Attributes::Attributes): Add a devicePixelRatio attribute.
+            * platform/graphics/mac/WebGLLayer.h: New property to save us looking up the attributes
+            each frame.
+            * platform/graphics/mac/WebGLLayer.mm:
+            (-[WebGLLayer initWithGraphicsContext3D:]): Store the devicePixelRatio, and set our
+            contents scale appropriately.
+            (-[WebGLLayer drawInCGLContext:pixelFormat:forLayerTime:displayTime:]): Draw into
+            a correctly sized backbuffer.
+            (-[WebGLLayer copyImageSnapshotWithColorSpace:]): Generate an image of the correct size.
+
+2014-10-21  Dana Burkart  &lt;dburkart@apple.com&gt;
+
</ins><span class="cx">         Merge r173848
</span><span class="cx"> 
</span><span class="cx">     2014-09-22  Alexey Proskuryakov  &lt;ap@apple.com&gt;
</span></span></pre></div>
<a id="branchessafari6002branchSourceWebCorehtmlcanvasWebGLRenderingContextcpp"></a>
<div class="modfile"><h4>Modified: branches/safari-600.2-branch/Source/WebCore/html/canvas/WebGLRenderingContext.cpp (175011 => 175012)</h4>
<pre class="diff"><span>
<span class="info">--- branches/safari-600.2-branch/Source/WebCore/html/canvas/WebGLRenderingContext.cpp        2014-10-22 01:47:15 UTC (rev 175011)
+++ branches/safari-600.2-branch/Source/WebCore/html/canvas/WebGLRenderingContext.cpp        2014-10-22 01:50:23 UTC (rev 175012)
</span><span class="lines">@@ -437,6 +437,9 @@
</span><span class="cx">     if (frame-&gt;settings().forceSoftwareWebGLRendering())
</span><span class="cx">         attributes.forceSoftwareRenderer = true;
</span><span class="cx"> 
</span><ins>+    if (page)
+        attributes.devicePixelRatio = page-&gt;deviceScaleFactor();
+
</ins><span class="cx">     if (isPendingPolicyResolution) {
</span><span class="cx">         LOG(WebGL, &quot;Create a WebGL context that looks real, but will require a policy resolution if used.&quot;);
</span><span class="cx">         std::unique_ptr&lt;WebGLRenderingContext&gt; renderingContext(new WebGLRenderingContext(canvas, attributes));
</span></span></pre></div>
<a id="branchessafari6002branchSourceWebCoreplatformgraphicsGraphicsContext3Dh"></a>
<div class="modfile"><h4>Modified: branches/safari-600.2-branch/Source/WebCore/platform/graphics/GraphicsContext3D.h (175011 => 175012)</h4>
<pre class="diff"><span>
<span class="info">--- branches/safari-600.2-branch/Source/WebCore/platform/graphics/GraphicsContext3D.h        2014-10-22 01:47:15 UTC (rev 175011)
+++ branches/safari-600.2-branch/Source/WebCore/platform/graphics/GraphicsContext3D.h        2014-10-22 01:50:23 UTC (rev 175012)
</span><span class="lines">@@ -443,6 +443,7 @@
</span><span class="cx">             , preferDiscreteGPU(false)
</span><span class="cx">             , multithreaded(false)
</span><span class="cx">             , forceSoftwareRenderer(false)
</span><ins>+            , devicePixelRatio(1)
</ins><span class="cx">         {
</span><span class="cx">         }
</span><span class="cx"> 
</span><span class="lines">@@ -457,6 +458,7 @@
</span><span class="cx">         bool preferDiscreteGPU;
</span><span class="cx">         bool multithreaded;
</span><span class="cx">         bool forceSoftwareRenderer;
</span><ins>+        float devicePixelRatio;
</ins><span class="cx">     };
</span><span class="cx"> 
</span><span class="cx">     enum RenderStyle {
</span></span></pre></div>
<a id="branchessafari6002branchSourceWebCoreplatformgraphicsmacWebGLLayerh"></a>
<div class="modfile"><h4>Modified: branches/safari-600.2-branch/Source/WebCore/platform/graphics/mac/WebGLLayer.h (175011 => 175012)</h4>
<pre class="diff"><span>
<span class="info">--- branches/safari-600.2-branch/Source/WebCore/platform/graphics/mac/WebGLLayer.h        2014-10-22 01:47:15 UTC (rev 175011)
+++ branches/safari-600.2-branch/Source/WebCore/platform/graphics/mac/WebGLLayer.h        2014-10-22 01:50:23 UTC (rev 175012)
</span><span class="lines">@@ -40,6 +40,7 @@
</span><span class="cx"> #endif
</span><span class="cx"> {
</span><span class="cx">     WebCore::GraphicsContext3D* _context;
</span><ins>+    float _devicePixelRatio;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> @property (nonatomic) WebCore::GraphicsContext3D* context;
</span></span></pre></div>
<a id="branchessafari6002branchSourceWebCoreplatformgraphicsmacWebGLLayermm"></a>
<div class="modfile"><h4>Modified: branches/safari-600.2-branch/Source/WebCore/platform/graphics/mac/WebGLLayer.mm (175011 => 175012)</h4>
<pre class="diff"><span>
<span class="info">--- branches/safari-600.2-branch/Source/WebCore/platform/graphics/mac/WebGLLayer.mm        2014-10-22 01:47:15 UTC (rev 175011)
+++ branches/safari-600.2-branch/Source/WebCore/platform/graphics/mac/WebGLLayer.mm        2014-10-22 01:50:23 UTC (rev 175012)
</span><span class="lines">@@ -48,6 +48,10 @@
</span><span class="cx"> {
</span><span class="cx">     _context = context;
</span><span class="cx">     self = [super init];
</span><ins>+    _devicePixelRatio = context-&gt;getContextAttributes().devicePixelRatio;
+#if !PLATFORM(IOS)
+    self.contentsScale = _devicePixelRatio;
+#endif
</ins><span class="cx">     return self;
</span><span class="cx"> }
</span><span class="cx"> 
</span><span class="lines">@@ -81,7 +85,9 @@
</span><span class="cx">     CGLSetCurrentContext(glContext);
</span><span class="cx"> 
</span><span class="cx">     CGRect frame = [self frame];
</span><del>-        
</del><ins>+    frame.size.width *= _devicePixelRatio;
+    frame.size.height *= _devicePixelRatio;
+
</ins><span class="cx">     // draw the FBO into the layer
</span><span class="cx">     glViewport(0, 0, frame.size.width, frame.size.height);
</span><span class="cx">     glMatrixMode(GL_PROJECTION);
</span><span class="lines">@@ -134,8 +140,8 @@
</span><span class="cx"> 
</span><span class="cx">     CGRect layerBounds = CGRectIntegral([self bounds]);
</span><span class="cx">     
</span><del>-    size_t width = layerBounds.size.width;
-    size_t height = layerBounds.size.height;
</del><ins>+    size_t width = layerBounds.size.width * _devicePixelRatio;
+    size_t height = layerBounds.size.height * _devicePixelRatio;
</ins><span class="cx"> 
</span><span class="cx">     size_t rowBytes = (width * 4 + 15) &amp; ~15;
</span><span class="cx">     size_t dataSize = rowBytes * height;
</span></span></pre>
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