Enabling the canvas bit to turn the clip stack into a flat replace exposed around 100 failures when testing the 800K skp set generated from the top 1M web sites.

This fixes all but one of those failures.

Major changes include:
- Replace angle indices with angle pointers. This was motivated by the need to add angles later but not renumber existing angles.
- Aggressive segment chase. When the winding is known on a segment, more aggressively passing that winding to adjacent segments allows fragmented data sets to succeed.
- Line segments with ends nearly the same are treated as coincident first.
- Transfer partial coincidence by observing that if segment A is partially coincident to B and C then B and C may be partially coincident.

TBR=reed

Author: caryclark@google.com

Review URL: https://codereview.chromium.org/272153002

1 files changed, 5 insertions, 0 deletions

diff --git a/src/pathops/SkIntersectionHelper.h b/src/pathops/SkIntersectionHelper.h
index 4e8c658ec2..3569c934de 100644
--- a/src/pathops/SkIntersectionHelper.h
+++ b/src/pathops/SkIntersectionHelper.h
@@ -54,6 +54,11 @@ public:
         return ++fIndex < fLast;
     }
 
+    void alignTPt(SkIntersectionHelper& other, bool swap, int index,
+            SkIntersections* ts, SkPoint* point) {
+        fContour->alignTPt(fIndex, other.fContour, other.fIndex, swap, index, ts, point);
+    }
+
     SkScalar bottom() const {
         return bounds().fBottom;
     }