[webkit-changes] [140464] branches/chromium/1364

Tue, 22 Jan 2013 14:01:25 -0800

Title: [140464] branches/chromium/1364
Revision
140464
Author
[email protected]
Date
2013-01-22 14:03:09 -0800 (Tue, 22 Jan 2013)

Log Message

Merge 139137
> Color bleeding with rounded rectangles on high dpi displays
> https://bugs.webkit.org/show_bug.cgi?id=106373
> 
> Reviewed by Simon Fraser.
> 
> Source/WebCore:
> 
> Test: fast/backgrounds/gradient-background-leakage-hidpi.html
> 
> Avoid using the BackgroundBleedShrinkBackground draw strategy for
> RenderBox when border width is less than two layout units. This
> is because rounded rectangles are always snapped to integer layout
> coordinates, even with subpixel layout enabled.
> 
> * rendering/RenderBox.cpp:
> (WebCore::RenderBox::determineBackgroundBleedAvoidance):
> 
> LayoutTests:
> 
> New layout test to verify that rounded rectangle corners do not
> produce color bleeding on high dpi devices.
> 
> * fast/backgrounds/gradient-background-leakage-hidpi-expected.txt: Added.
> * fast/backgrounds/gradient-background-leakage-hidpi.html: Added.
> * platform/chromium-linux/fast/backgrounds/gradient-background-leakage-hidpi-expected.png: Added.
> 

[email protected]

Modified Paths

Added Paths

Diff

Copied: branches/chromium/1364/LayoutTests/fast/backgrounds/gradient-background-leakage-hidpi-expected.txt (from rev 139137, trunk/LayoutTests/fast/backgrounds/gradient-background-leakage-hidpi-expected.txt) (0 => 140464)


--- branches/chromium/1364/LayoutTests/fast/backgrounds/gradient-background-leakage-hidpi-expected.txt	                        (rev 0)
+++ branches/chromium/1364/LayoutTests/fast/backgrounds/gradient-background-leakage-hidpi-expected.txt	2013-01-22 22:03:09 UTC (rev 140464)
@@ -0,0 +1,7 @@
+layer at (0,0) size 800x600
+  RenderView at (0,0) size 800x600
+layer at (0,0) size 800x68
+  RenderBlock {HTML} at (0,0) size 800x68
+    RenderBody {BODY} at (8,8) size 784x52
+      RenderBlock {DIV} at (0,0) size 220x52 [bgcolor=#FF0000]
+        RenderBlock {DIV} at (10,10) size 202x32 [border: (1px solid #008000)]

Copied: branches/chromium/1364/LayoutTests/fast/backgrounds/gradient-background-leakage-hidpi.html (from rev 139137, trunk/LayoutTests/fast/backgrounds/gradient-background-leakage-hidpi.html) (0 => 140464)


--- branches/chromium/1364/LayoutTests/fast/backgrounds/gradient-background-leakage-hidpi.html	                        (rev 0)
+++ branches/chromium/1364/LayoutTests/fast/backgrounds/gradient-background-leakage-hidpi.html	2013-01-22 22:03:09 UTC (rev 140464)
@@ -0,0 +1,32 @@
+<!DOCTYPE html>
+<html>
+<head>
+  <style type="text/css">
+    .box {
+      height: 30px;
+      width: 200px;
+      background-image: -webkit-linear-gradient(black, black);
+      border-radius: 25px;
+      border: 1px solid green;
+    }
+  </style>
+</head>
+    <script>
+        window._onload_ = function() {
+            if (window.testRunner) {
+                testRunner.waitUntilDone();
+                testRunner.setBackingScaleFactor(2, finishTest);
+            }
+        }
+
+        function finishTest() {
+            setTimeout(function() { testRunner.notifyDone(); }, 0);
+        }
+    </script>
+<body>
+  <!-- You should see no red leaking through the inner edge of the border. -->
+  <div style="background-color: red; padding: 10px; width: 200px">
+    <div class="box"></div>
+  </div>
+</body>
+</html>

Modified: branches/chromium/1364/LayoutTests/platform/chromium/TestExpectations (140463 => 140464)


--- branches/chromium/1364/LayoutTests/platform/chromium/TestExpectations	2013-01-22 21:42:06 UTC (rev 140463)
+++ branches/chromium/1364/LayoutTests/platform/chromium/TestExpectations	2013-01-22 22:03:09 UTC (rev 140464)
@@ -2720,6 +2720,9 @@
 # New test added in r85454. Actual failure.
 webkit.org/b/91676 fast/js/mozilla/strict/assign-to-callee-name.html [ Failure ]
 
+# Test needing new baselines with fix for bug 106373
+webkit.org/b/106373 fast/backgrounds/gradient-background-leakage-hidpi.html [ Pass ImageOnlyFailure ]
+
 # Failure introduced by Chromium r83848.
 crbug.com/137938 [ Mac Android ] fast/url/ipv6.html [ Failure ]

Copied: branches/chromium/1364/LayoutTests/platform/chromium-linux/fast/backgrounds/gradient-background-leakage-hidpi-expected.png (from rev 139137, trunk/LayoutTests/platform/chromium-linux/fast/backgrounds/gradient-background-leakage-hidpi-expected.png) (0 => 140464)


--- branches/chromium/1364/LayoutTests/platform/chromium-linux/fast/backgrounds/gradient-background-leakage-hidpi-expected.png	                        (rev 0)
+++ branches/chromium/1364/LayoutTests/platform/chromium-linux/fast/backgrounds/gradient-background-leakage-hidpi-expected.png	2013-01-22 22:03:09 UTC (rev 140464)
@@ -0,0 +1,17 @@
+\x89PNG
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\ No newline at end of file

Modified: branches/chromium/1364/Source/WebCore/rendering/RenderBox.cpp (140463 => 140464)


--- branches/chromium/1364/Source/WebCore/rendering/RenderBox.cpp	2013-01-22 21:42:06 UTC (rev 140463)
+++ branches/chromium/1364/Source/WebCore/rendering/RenderBox.cpp	2013-01-22 22:03:09 UTC (rev 140464)
@@ -943,6 +943,21 @@
 
     AffineTransform ctm = context->getCTM();
     FloatSize contextScaling(static_cast<float>(ctm.xScale()), static_cast<float>(ctm.yScale()));
+
+    // Because RoundedRect uses IntRect internally the inset applied by the 
+    // BackgroundBleedShrinkBackground strategy cannot be less than one integer
+    // layout coordinate, even with subpixel layout enabled. To take that into
+    // account, we clamp the contextScaling to 1.0 for the following test so
+    // that borderObscuresBackgroundEdge can only return true if the border
+    // widths are greater than 2 in both layout coordinates and screen
+    // coordinates.
+    // This precaution will become obsolete if RoundedRect is ever promoted to
+    // a sub-pixel representation.
+    if (contextScaling.width() > 1) 
+        contextScaling.setWidth(1);
+    if (contextScaling.height() > 1) 
+        contextScaling.setHeight(1);
+
     if (borderObscuresBackgroundEdge(contextScaling))
         return BackgroundBleedShrinkBackground;
     if (!style->hasAppearance() && borderObscuresBackground() && backgroundHasOpaqueTopLayer())

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