[webkit-changes] [99454] trunk

Mon, 07 Nov 2011 12:19:03 -0800

Title: [99454] trunk
Revision
99454
Author
[email protected]
Date
2011-11-07 12:18:52 -0800 (Mon, 07 Nov 2011)

Log Message

Optimize outline rendering to avoid transparency layers
https://bugs.webkit.org/show_bug.cgi?id=60750

Source/WebCore:

Add fast path for solid block outlines with alpha.
Improve readability of piecewise path while at it.

Patch by David Barr <[email protected]> on 2011-11-07
Reviewed by Simon Fraser.

No intended change in behaviour, no new tests.

* rendering/RenderObject.cpp:
(WebCore::RenderObject::paintOutline):

LayoutTests:

Rebaseline pixel tests to accommodate subtle change in rounding.

Patch by David Barr <[email protected]> on 2011-11-07
Reviewed by Simon Fraser.

* platform/chromium-linux/fast/box-shadow/box-shadow-radius-expected.png: Added.
* platform/chromium-linux/fast/layers/self-painting-outline-expected.png: Added.

Modified Paths

Added Paths

Diff

Modified: trunk/LayoutTests/ChangeLog (99453 => 99454)


--- trunk/LayoutTests/ChangeLog	2011-11-07 20:09:42 UTC (rev 99453)
+++ trunk/LayoutTests/ChangeLog	2011-11-07 20:18:52 UTC (rev 99454)
@@ -1,3 +1,15 @@
+2011-11-07  David Barr  <[email protected]>
+
+        Optimize outline rendering to avoid transparency layers
+        https://bugs.webkit.org/show_bug.cgi?id=60750
+
+        Rebaseline pixel tests to accommodate subtle change in rounding.
+
+        Reviewed by Simon Fraser.
+
+        * platform/chromium-linux/fast/box-shadow/box-shadow-radius-expected.png: Added.
+        * platform/chromium-linux/fast/layers/self-painting-outline-expected.png: Added.
+
 2011-11-07  Tony Chang  <[email protected]>
 
         [chromium] Mark perf/documnet-contians.html as slow.

Added: trunk/LayoutTests/platform/chromium-linux/fast/box-shadow/box-shadow-radius-expected.png (0 => 99454)


--- trunk/LayoutTests/platform/chromium-linux/fast/box-shadow/box-shadow-radius-expected.png	                        (rev 0)
+++ trunk/LayoutTests/platform/chromium-linux/fast/box-shadow/box-shadow-radius-expected.png	2011-11-07 20:18:52 UTC (rev 99454)
@@ -0,0 +1,98 @@
+\x89PNG
+
+
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\ No newline at end of file

Added: trunk/LayoutTests/platform/chromium-linux/fast/layers/self-painting-outline-expected.png (0 => 99454)


--- trunk/LayoutTests/platform/chromium-linux/fast/layers/self-painting-outline-expected.png	                        (rev 0)
+++ trunk/LayoutTests/platform/chromium-linux/fast/layers/self-painting-outline-expected.png	2011-11-07 20:18:52 UTC (rev 99454)
@@ -0,0 +1,5 @@
+\x89PNG
+
+
+IHDR X\xA0\xB83)tEXtchecksum64c42b1be34e463797b512771a8aa83b\xE5L$\xF0PLTE\xFF\xFF\xFFs\xE7\xFCIDATx\x9C\xED\xD61 \xB1:\xC1\xBF\x9C\x95\xB4\\xDE@֏l( y\x99\xB15 \x81@ \x81@ \x81@ \x81@ \x81@ R\x81@ \x90\xC8?\xB7\x81@ \x81@ \x81@ \x81@ \x81@ R\x80\xD4\x81@ \x81@ \x81@ \x81@ \x81@ \x81@ \x81@ \x81@ \x81@ \x81@ \x81@ \x81@ \x81@ \x81@ \x81@ \x81@ \x81@ iC\x9F\x9B\xC9
+KKL\xC6IEND\xAEB`\x82
\ No newline at end of file

Modified: trunk/Source/WebCore/ChangeLog (99453 => 99454)


--- trunk/Source/WebCore/ChangeLog	2011-11-07 20:09:42 UTC (rev 99453)
+++ trunk/Source/WebCore/ChangeLog	2011-11-07 20:18:52 UTC (rev 99454)
@@ -1,3 +1,18 @@
+2011-11-07  David Barr  <[email protected]>
+
+        Optimize outline rendering to avoid transparency layers
+        https://bugs.webkit.org/show_bug.cgi?id=60750
+
+        Add fast path for solid block outlines with alpha.
+        Improve readability of piecewise path while at it.
+
+        Reviewed by Simon Fraser.
+
+        No intended change in behaviour, no new tests.
+
+        * rendering/RenderObject.cpp:
+        (WebCore::RenderObject::paintOutline):
+
 2011-11-07  Vsevolod Vlasov  <[email protected]>
 
         Web Inspector: Suggest box should not accept suggestion on space key pressed.

Modified: trunk/Source/WebCore/rendering/RenderObject.cpp (99453 => 99454)


--- trunk/Source/WebCore/rendering/RenderObject.cpp	2011-11-07 20:09:42 UTC (rev 99453)
+++ trunk/Source/WebCore/rendering/RenderObject.cpp	2011-11-07 20:18:52 UTC (rev 99454)
@@ -1133,26 +1133,38 @@
     if (styleToUse->outlineStyleIsAuto() || styleToUse->outlineStyle() == BNONE)
         return;
 
-    LayoutRect adjustedPaintRec = paintRect;
-    adjustedPaintRec.inflate(offset);
+    LayoutRect inner = paintRect;
+    inner.inflate(offset);
 
-    if (adjustedPaintRec.isEmpty())
+    if (inner.isEmpty())
         return;
 
+    LayoutRect outer = inner;
+    outer.inflate(outlineWidth);
+
     bool useTransparencyLayer = outlineColor.hasAlpha();
     if (useTransparencyLayer) {
+        if (outlineStyle == SOLID) {
+            Path path;
+            path.addRect(outer);
+            path.addRect(inner);
+            graphicsContext->setFillRule(RULE_EVENODD);
+            graphicsContext->setFillColor(outlineColor, styleToUse->colorSpace());
+            graphicsContext->fillPath(path);
+            return;
+        }
         graphicsContext->beginTransparencyLayer(static_cast<float>(outlineColor.alpha()) / 255);
         outlineColor = Color(outlineColor.red(), outlineColor.green(), outlineColor.blue());
     }
 
-    LayoutUnit leftOuter = adjustedPaintRec.x() - outlineWidth;
-    LayoutUnit leftInner = adjustedPaintRec.x();
-    LayoutUnit rightOuter = adjustedPaintRec.maxX() + outlineWidth;
-    LayoutUnit rightInner = adjustedPaintRec.maxX();
-    LayoutUnit topOuter = adjustedPaintRec.y() - outlineWidth;
-    LayoutUnit topInner = adjustedPaintRec.y();
-    LayoutUnit bottomOuter = adjustedPaintRec.maxY() + outlineWidth;
-    LayoutUnit bottomInner = adjustedPaintRec.maxY();
+    LayoutUnit leftOuter = outer.x();
+    LayoutUnit leftInner = inner.x();
+    LayoutUnit rightOuter = outer.maxX();
+    LayoutUnit rightInner = inner.maxX();
+    LayoutUnit topOuter = outer.y();
+    LayoutUnit topInner = inner.y();
+    LayoutUnit bottomOuter = outer.maxY();
+    LayoutUnit bottomInner = inner.maxY();
     
     drawLineForBoxSide(graphicsContext, leftOuter, topOuter, leftInner, bottomOuter, BSLeft, outlineColor, outlineStyle, outlineWidth, outlineWidth);
     drawLineForBoxSide(graphicsContext, leftOuter, topOuter, rightOuter, topInner, BSTop, outlineColor, outlineStyle, outlineWidth, outlineWidth);

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