path ops -- make combined clips soft if one is soft

src/core/SkCanvas.cpp

Index: src/core/SkCanvas.cpp
===================================================================
--- src/core/SkCanvas.cpp	(revision 9040)
+++ src/core/SkCanvas.cpp	(working copy)
@@ -1268,6 +1268,7 @@
             } else {
                 Op(devPath, operand, (SkPathOp) elementOp, &devPath);
             }
+            doAA |= element->isAA();

[reed1, 2013/05/07 19:24:28]

might add a comment, since its our best-guess at a heuristic:

// if the prev and curr clips disagree about aa -vs- not, favor the aa request.
// perhaps we need an API change to avoid this sort of mixed-signals about
// clipping.

         }
         op = SkRegion::kReplace_Op;
     }