keep integral rectangle intersections integral

A pair of coincident lines can generate multiple intersection
points. Path ops is more stable when the intersection T value
is used to recompute the intersection point, but this has
the side-effect of making integral edges intersect at non-integral
values.

While it's worthwhile to fix this, for the moment it is less
disruptive to only worry about keeping intersection values
integral if the original intersection point is integral in
both axes.

Also, fix some debugging code that bit-rotted.

R=msarett@google.com

Change-Id: Iefd27b25d1d21c22b224c174bd59bc6c105033c4
Reviewed-on: https://skia-review.googlesource.com/13721
Reviewed-by: Matt Sarett <msarett@google.com>
Commit-Queue: Cary Clark <caryclark@google.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/src/pathops/SkOpSegment.h b/src/pathops/SkOpSegment.h
index 20b0956580..4bde8166f7 100644
--- a/src/pathops/SkOpSegment.h
+++ b/src/pathops/SkOpSegment.h
@@ -93,6 +93,7 @@ public:
     }
 
     SkOpPtT* addT(double t);
+    SkOpPtT* addT(double t, const SkPoint& pt);
 
     template<typename T> T* allocateArray(int count) {
         return SkOpTAllocator<T>::AllocateArray(this->globalState()->allocator(), count);