Add intersections for path ops

tests/PathOpsQuadIntersectionTestData.cpp

+/*
+ * Copyright 2012 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "PathOpsQuadIntersectionTestData.h"
+
+const SkDQuad quadraticPoints[] = {
+    {{{0, 0}, {1, 0}, {0, 0}}},
+    {{{0, 0}, {0, 1}, {0, 0}}},
+    {{{0, 0}, {1, 1}, {0, 0}}},
+    {{{1, 1}, {2, 2}, {1, 1}}},
+};
+
+const size_t quadraticPoints_count = sizeof(quadraticPoints) / sizeof(quadraticPoints[0]);
+
+const SkDQuad quadraticLines[] = {
+    {{{0, 0}, {0, 0}, {1, 0}}},
+    {{{1, 0}, {0, 0}, {0, 0}}},
+    {{{1, 0}, {2, 0}, {3, 0}}},
+    {{{0, 0}, {0, 0}, {0, 1}}},
+    {{{0, 1}, {0, 0}, {0, 0}}},
+    {{{0, 1}, {0, 2}, {0, 3}}},
+    {{{0, 0}, {0, 0}, {1, 1}}},
+    {{{1, 1}, {0, 0}, {0, 0}}},
+    {{{1, 1}, {2, 2}, {3, 3}}},
+    {{{1, 1}, {3, 3}, {3, 3}}},
+    {{{1, 1}, {1, 1}, {2, 2}}},
+    {{{1, 1}, {1, 1}, {3, 3}}},
+    {{{1, 1}, {2, 2}, {4, 4}}},  // no coincident
+    {{{1, 1}, {3, 3}, {4, 4}}},
+    {{{1, 1}, {3, 3}, {2, 2}}},
+    {{{1, 1}, {4, 4}, {2, 2}}},
+    {{{1, 1}, {4, 4}, {3, 3}}},
+    {{{2, 2}, {1, 1}, {3, 3}}},
+    {{{2, 2}, {1, 1}, {4, 4}}},
+    {{{2, 2}, {3, 3}, {1, 1}}},
+    {{{2, 2}, {3, 3}, {4, 4}}},
+    {{{2, 2}, {4, 4}, {1, 1}}},
+    {{{2, 2}, {4, 4}, {3, 3}}},
+};
+
+const size_t quadraticLines_count = sizeof(quadraticLines) / sizeof(quadraticLines[0]);
+
+static const double F = FLT_EPSILON * 3;
+static const double H = FLT_EPSILON * 4;
+static const double J = FLT_EPSILON * 5;
+static const double K = FLT_EPSILON * 8;  // INVESTIGATE: why are larger multiples necessary?
+
+const SkDQuad quadraticModEpsilonLines[] = {
+    {{{0, F}, {0, 0}, {1, 0}}},
+    {{{0, 0}, {1, 0}, {0, F}}},
+    {{{1, 0}, {0, F}, {0, 0}}},
+    {{{1, H}, {2, 0}, {3, 0}}},
+    {{{F, 0}, {0, 0}, {0, 1}}},
+    {{{0, 0}, {0, 1}, {F, 0}}},
+    {{{0, 1}, {F, 0}, {0, 0}}},
+    {{{H, 1}, {0, 2}, {0, 3}}},
+    {{{0, F}, {0, 0}, {1, 1}}},
+    {{{0, 0}, {1, 1}, {F, 0}}},
+    {{{1, 1}, {F, 0}, {0, 0}}},
+    {{{1, 1+J}, {2, 2}, {3, 3}}},
+    {{{1, 1}, {3, 3}, {3+F, 3}}},
+    {{{1, 1}, {1+F, 1}, {2, 2}}},
+    {{{1, 1}, {2, 2}, {1, 1+F}}},
+    {{{1, 1}, {1, 1+F}, {3, 3}}},
+    {{{1+H, 1}, {2, 2}, {4, 4}}},  // no coincident
+    {{{1, 1+K}, {3, 3}, {4, 4}}},
+    {{{1, 1}, {3+F, 3}, {2, 2}}},
+    {{{1, 1}, {4, 4+F}, {2, 2}}},
+    {{{1, 1}, {4, 4}, {3+F, 3}}},
+    {{{2, 2}, {1, 1}, {3, 3+F}}},
+    {{{2+F, 2}, {1, 1}, {4, 4}}},
+    {{{2, 2+F}, {3, 3}, {1, 1}}},
+    {{{2, 2}, {3+F, 3}, {4, 4}}},
+    {{{2, 2}, {4, 4+F}, {1, 1}}},
+    {{{2, 2}, {4, 4}, {3+F, 3}}},
+};
+
+const size_t quadraticModEpsilonLines_count =
+        sizeof(quadraticModEpsilonLines) / sizeof(quadraticModEpsilonLines[0]);
+
+const SkDQuad quadraticTests[][2] = {
+    {  // one intersection
+     {{{0, 0},
+      {0, 1},
+      {1, 1}}},
+     {{{0, 1},
+      {0, 0},
+      {1, 0}}}
+    },
+    {  // four intersections
+     {{{1, 0},
+      {2, 6},
+      {3, 0}}},
+     {{{0, 1},
+      {6, 2},
+      {0, 3}}}
+    }
+};
+
+const size_t quadraticTests_count = sizeof(quadraticTests) / sizeof(quadraticTests[0]);