Merge in WebKit r47029.

1 files changed, 4 insertions, 4 deletions

diff --git a/WebCore/platform/graphics/cg/PatternCG.cpp b/WebCore/platform/graphics/cg/PatternCG.cpp
index 697bc57..63628f4 100644
--- a/WebCore/platform/graphics/cg/PatternCG.cpp
+++ b/WebCore/platform/graphics/cg/PatternCG.cpp
@@ -62,10 +62,10 @@ CGPatternRef Pattern::createPlatformPattern(const TransformationMatrix& userSpac
     // If FLT_MAX should also be used for xStep or yStep, nothing is rendered. Using fractions of FLT_MAX also
     // result in nothing being rendered.
     // INT_MAX is almost correct, but there seems to be some number wrapping occuring making the fill
-    // pattern is not filled correctly. 
-    // So, just pick a really large number that works. 
-    float xStep = m_repeatX ? tileRect.width() : (100000000.0f);
-    float yStep = m_repeatY ? tileRect.height() : (100000000.0f);
+    // pattern is not filled correctly.
+    // To make error of floating point less than 0.5, we use the half of the number of mantissa of float (1 << 22).
+    CGFloat xStep = m_repeatX ? tileRect.width() : (1 << 22);
+    CGFloat yStep = m_repeatY ? tileRect.height() : (1 << 22);
 
     // The pattern will release the tile when it's done rendering in patternReleaseCallback
     tileImage()->ref();