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, 18 insertions, 1 deletions

diff --git a/tests/PathOpsSimplifyTest.cpp b/tests/PathOpsSimplifyTest.cpp
index 7b5128cc2b..4bfab14488 100644
--- a/tests/PathOpsSimplifyTest.cpp
+++ b/tests/PathOpsSimplifyTest.cpp
@@ -4653,9 +4653,26 @@ static void testQuads61(skiatest::Reporter* reporter, const char* filename) {
     testSimplify(reporter, path, filename);
 }
 
-static void (*firstTest)(skiatest::Reporter* , const char* filename) = testQuadratic56;
+static void testQuadralateral10(skiatest::Reporter* reporter, const char* filename) {
+    SkPath path;
+    path.setFillType(SkPath::kWinding_FillType);
+    path.moveTo(0, 0);
+    path.lineTo(0, 0);
+    path.lineTo(0, 0);
+    path.lineTo(2, 2);
+    path.close();
+    path.moveTo(1, 0);
+    path.lineTo(1, 1);
+    path.lineTo(2, 2);
+    path.lineTo(1, 3);
+    path.close();
+    testSimplify(reporter, path, filename);
+}
+
+static void (*firstTest)(skiatest::Reporter* , const char* filename) = 0;
 
 static TestDesc tests[] = {
+    TEST(testQuadralateral10),
     TEST(testQuads61),
     TEST(testQuads60),
     TEST(testQuads59),