Add base types for path ops

tests/PathOpsBoundsTest.cpp

Index: tests/PathOpsBoundsTest.cpp
===================================================================
--- tests/PathOpsBoundsTest.cpp	(revision 0)
+++ tests/PathOpsBoundsTest.cpp	(revision 0)
@@ -0,0 +1,106 @@
+/*
+ * Copyright 2013 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+#include "SkPathOpsBounds.h"
+#include "Test.h"
+
+static const SkRect sectTests[][2] = {
+    {{2, 0, 4, 1}, {4, 0, 6, 1}},
+    {{2, 0, 4, 1}, {3, 0, 5, 1}},
+    {{2, 0, 4, 1}, {3, 0, 5, 0}},
+    {{2, 0, 4, 1}, {3, 1, 5, 2}},
+    {{2, 1, 4, 2}, {1, 0, 5, 3}},
+    {{2, 1, 5, 3}, {3, 1, 4, 2}},
+    {{2, 0, 4, 1}, {3, 0, 3, 0}},  // intersecting an empty bounds is OK
+    {{2, 0, 4, 1}, {4, 1, 5, 2}},  // touching just on a corner is OK
+};
+
+static const size_t sectTestsCount = sizeof(sectTests) / sizeof(sectTests[0]);
+
+static const SkRect noSectTests[][2] = {
+    {{2, 0, 4, 1}, {5, 0, 6, 1}},
+    {{2, 0, 4, 1}, {3, 2, 5, 2}},
+};
+
+static const size_t noSectTestsCount = sizeof(noSectTests) / sizeof(noSectTests[0]);
+
+static const SkRect reallyEmpty[] = {
+    {0, 0, 0, 0},
+    {1, 1, 1, 0},
+    {1, 1, 0, 1},
+    {1, 1, 0, 0},
+    {1, 2, 3, SK_ScalarNaN},
+};
+
+static const size_t emptyTestsCount = sizeof(reallyEmpty) / sizeof(reallyEmpty[0]);
+
+static const SkRect notReallyEmpty[] = {
+    {0, 0, 1, 0},
+    {0, 0, 0, 1},
+    {0, 0, 1, 1},
+};
+
+static const size_t notEmptyTestsCount = sizeof(notReallyEmpty) / sizeof(notReallyEmpty[0]);
+
+static void OpBoundsTest(skiatest::Reporter* reporter) {
+    for (size_t index = 0; index < sectTestsCount; ++index) {
+        const SkPathOpsBounds& bounds1 = static_cast<const SkPathOpsBounds&>(sectTests[index][0]);
+        const SkPathOpsBounds& bounds2 = static_cast<const SkPathOpsBounds&>(sectTests[index][1]);
+        bool touches = SkPathOpsBounds::Intersects(bounds1, bounds2);
+        REPORTER_ASSERT(reporter, touches);
+    }
+    for (size_t index = 0; index < noSectTestsCount; ++index) {
+        const SkPathOpsBounds& bounds1 = static_cast<const SkPathOpsBounds&>(noSectTests[index][0]);
+        const SkPathOpsBounds& bounds2 = static_cast<const SkPathOpsBounds&>(noSectTests[index][1]);
+        bool touches = SkPathOpsBounds::Intersects(bounds1, bounds2);
+        REPORTER_ASSERT(reporter, !touches);
+    }
+    SkPathOpsBounds bounds;
+    bounds.setEmpty();
+    bounds.add(1, 2, 3, 4);
+    SkPathOpsBounds expected;
+    expected.set(0, 0, 3, 4);
+    REPORTER_ASSERT(reporter, bounds == expected);
+    bounds.setEmpty();
+    SkPathOpsBounds ordinal;
+    ordinal.set(1, 2, 3, 4);
+    bounds.add(ordinal);
+    REPORTER_ASSERT(reporter, bounds == expected);
+    SkPoint topLeft = {0, 0};
+    bounds.setPointBounds(topLeft);
+    SkPoint botRight = {3, 4};
+    bounds.add(botRight);
+    REPORTER_ASSERT(reporter, bounds == expected);
+    for (size_t index = 0; index < emptyTestsCount; ++index) {
+        const SkPathOpsBounds& bounds = static_cast<const SkPathOpsBounds&>(reallyEmpty[index]);
+        bool empty = bounds.isReallyEmpty();
+        REPORTER_ASSERT(reporter, empty);
+    }
+    for (size_t index = 0; index < notEmptyTestsCount; ++index) {
+        const SkPathOpsBounds& bounds = static_cast<const SkPathOpsBounds&>(notReallyEmpty[index]);
+        bool empty = bounds.isReallyEmpty();
+        REPORTER_ASSERT(reporter, !empty);
+    }
+    const SkPoint curvePts[] = {{0, 0}, {1, 2}, {3, 4}, {5, 6}};
+    bounds.setLineBounds(curvePts);
+    expected.set(0, 0, 1, 2);
+    REPORTER_ASSERT(reporter, bounds == expected);
+    (bounds.*SetCurveBounds[1])(curvePts);
+    REPORTER_ASSERT(reporter, bounds == expected);
+    bounds.setQuadBounds(curvePts);
+    expected.set(0, 0, 3, 4);
+    REPORTER_ASSERT(reporter, bounds == expected);
+    (bounds.*SetCurveBounds[2])(curvePts);
+    REPORTER_ASSERT(reporter, bounds == expected);
+    bounds.setCubicBounds(curvePts);
+    expected.set(0, 0, 5, 6);
+    REPORTER_ASSERT(reporter, bounds == expected);
+    (bounds.*SetCurveBounds[3])(curvePts);
+    REPORTER_ASSERT(reporter, bounds == expected);
+}
+
+#include "TestClassDef.h"
+DEFINE_TESTCLASS("PathOpsBounds", PathOpsBoundsClass, OpBoundsTest)