Fix bug where ovals' AA exceed bounds by .5 pixel

src/gpu/GrOvalRenderer.cpp

Index: src/gpu/GrOvalRenderer.cpp
diff --git a/src/gpu/GrOvalRenderer.cpp b/src/gpu/GrOvalRenderer.cpp
index cef08f431e3a4f047737d6d845c66e58b8f2cf3a..0143020f7767ebc2d5c077afdacfc09692462e5a 100644
--- a/src/gpu/GrOvalRenderer.cpp
+++ b/src/gpu/GrOvalRenderer.cpp
@@ -944,6 +944,11 @@ static GrDrawBatch* create_ellipse_batch(GrColor color,
     xRadius += SK_ScalarHalf;
     yRadius += SK_ScalarHalf;
 

[robertphillips, 2016/06/30 14:10:16]

Hmmm ... can we not just remove the above 2 lines ?

[vjiaoblack, 2016/06/30 14:13:35]

Right yeah, sorry. Jim pointed this out while overlooking my commit.

Fixed in Patch Set 2.

+    // fix bug where the ovals are drawn 0.5 pixels too big on each side
+    // (the 0.5 width antialiasing exceeds the rect bounds)
+    xRadius -= 0.5f;
+    yRadius -= 0.5f;
+
     EllipseBatch::Geometry geometry;
     geometry.fColor = color;
     geometry.fXRadius = xRadius;