Rewriting path writer

The path writer takes constructs the output path out of
curves that satisfy the pathop operation.

Curves contain lists of t/point pairs that may not be
comparable to each other. To match up curve ends in the
output path, look for adjacent curves to have a shared
membership rather than comparing point values.

Use path utilities to connect partial curve lists into
closed contours.

Share the angle code that determines if a curve has become
a degenerate line with the path writer.

Clean up some code on the way, and delete some unused
functions.

TBR=reed@google.com
BUG=5188
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2321973005

Review-Url: https://codereview.chromium.org/2321973005

1 files changed, 4 insertions, 4 deletions

diff --git a/src/pathops/SkOpEdgeBuilder.h b/src/pathops/SkOpEdgeBuilder.h
index 1a78a2137e..c6fc7dcb07 100644
--- a/src/pathops/SkOpEdgeBuilder.h
+++ b/src/pathops/SkOpEdgeBuilder.h
@@ -12,7 +12,8 @@
 
 class SkOpEdgeBuilder {
 public:
-    SkOpEdgeBuilder(const SkPathWriter& path, SkOpContour* contours2, SkOpGlobalState* globalState)
+    SkOpEdgeBuilder(const SkPathWriter& path, SkOpContourHead* contours2,
+            SkOpGlobalState* globalState)
         : fGlobalState(globalState)
         , fPath(path.nativePath())
         , fContoursHead(contours2)
@@ -20,7 +21,7 @@ public:
         init();
     }
 
-    SkOpEdgeBuilder(const SkPath& path, SkOpContour* contours2, SkOpGlobalState* globalState)
+    SkOpEdgeBuilder(const SkPath& path, SkOpContourHead* contours2, SkOpGlobalState* globalState)
         : fGlobalState(globalState)
         , fPath(&path)
         , fContoursHead(contours2)
@@ -37,7 +38,6 @@ public:
         }
     }
 
-    int count() const;
     bool finish();
 
     const SkOpContour* head() const {
@@ -60,7 +60,7 @@ private:
     SkTDArray<SkScalar> fWeights;
     SkTDArray<uint8_t> fPathVerbs;
     SkOpContour* fCurrentContour;
-    SkOpContour* fContoursHead;
+    SkOpContourHead* fContoursHead;
     SkPathOpsMask fXorMask[2];
     int fSecondHalf;
     bool fOperand;