compute split conic endpoints exactly

tests/PathOpsSimplifyTest.cpp

Index: tests/PathOpsSimplifyTest.cpp
diff --git a/tests/PathOpsSimplifyTest.cpp b/tests/PathOpsSimplifyTest.cpp
index 165ee8d11d2a3fff389f10cacb86f6cfb3b52a2b..386d10d1ce9c2933b0b805c1e1eb8083a4860e09 100644
--- a/tests/PathOpsSimplifyTest.cpp
+++ b/tests/PathOpsSimplifyTest.cpp
@@ -4874,11 +4874,29 @@ static void fuzz864a(skiatest::Reporter* reporter,const char* filename) {
     testSimplify(reporter, path, filename);
 }
 
+static void cr514118(skiatest::Reporter* reporter,const char* filename) {
+    SkPath path;
+path.moveTo(SkBits2Float(0x42c80000), SkBits2Float(0x42480000));  // 100, 50
+path.conicTo(SkBits2Float(0x42c80000), SkBits2Float(0x00000000), SkBits2Float(0x42480000), SkBits2Float(0x00000000), SkBits2Float(0x3f3504f3));  // 100, 0, 50, 0, 0.707107f
+path.conicTo(SkBits2Float(0x00000000), SkBits2Float(0x00000000), SkBits2Float(0x00000000), SkBits2Float(0x42480000), SkBits2Float(0x3f3504f3));  // 0, 0, 0, 50, 0.707107f
+path.conicTo(SkBits2Float(0x00000000), SkBits2Float(0x42c80000), SkBits2Float(0x42480000), SkBits2Float(0x42c80000), SkBits2Float(0x3f3504f3));  // 0, 100, 50, 100, 0.707107f
+path.conicTo(SkBits2Float(0x42c80000), SkBits2Float(0x42c80000), SkBits2Float(0x42c80000), SkBits2Float(0x42480000), SkBits2Float(0x3f3504f3));  // 100, 100, 100, 50, 0.707107f
+path.close();
+path.moveTo(SkBits2Float(0x42c80133), SkBits2Float(0x42480000));  // 100.002f, 50
+path.conicTo(SkBits2Float(0x42c80133), SkBits2Float(0x00000000), SkBits2Float(0x42480267), SkBits2Float(0x00000000), SkBits2Float(0x3f3504f3));  // 100.002f, 0, 50.0023f, 0, 0.707107f
+path.conicTo(SkBits2Float(0x3b19b530), SkBits2Float(0x00000000), SkBits2Float(0x3b19b530), SkBits2Float(0x42480000), SkBits2Float(0x3f3504f3));  // 0.00234539f, 0, 0.00234539f, 50, 0.707107f
+path.conicTo(SkBits2Float(0x3b19b530), SkBits2Float(0x42c80000), SkBits2Float(0x42480267), SkBits2Float(0x42c80000), SkBits2Float(0x3f3504f3));  // 0.00234539f, 100, 50.0023f, 100, 0.707107f
+path.conicTo(SkBits2Float(0x42c80133), SkBits2Float(0x42c80000), SkBits2Float(0x42c80133), SkBits2Float(0x42480000), SkBits2Float(0x3f3504f3));  // 100.002f, 100, 100.002f, 50, 0.707107f
+path.close();
+    testSimplify(reporter, path, filename);
+}
+
 static void (*skipTest)(skiatest::Reporter* , const char* filename) = 0;
 static void (*firstTest)(skiatest::Reporter* , const char* filename) = 0;
 static void (*stopTest)(skiatest::Reporter* , const char* filename) = 0;
 
 static TestDesc tests[] = {
+    TEST(cr514118),
     TEST(fuzz864a),
     TEST(testQuads65),
     TEST(testIssue3838_3),