Adding Blink-side 3d Box and Bounds calculations to TransformOperations

Source/platform/geometry/FloatBoxTestHelpers.cpp

+/*
+ * Copyright (C) 2014 Google Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1.  Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ * 2.  Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "platform/geometry/FloatBoxTestHelpers.h"
+
+#include "platform/geometry/FloatBox.h"
+const static float kTestEpsilon = 1e-6;
+
+void WebCore::PrintTo(const FloatBox& box, ::std::ostream* os)
+{
+    *os << "FloatBox("
+        << box.x() << ", "
+        << box.y() << ", "
+        << box.z() << ", "
+        << box.width() << ", "
+        << box.height() << ", "
+        << box.depth() << ")";
+}
+
+bool WebCore::FloatBoxTest::ApproximatelyEqual(const float& a, const float& b)
+{
+    float absA = ::fabs(a);
+    float absB = ::fabs(b);
+    float absErr = ::fabs(a - b);
+    if (a == b)
+        return true;
+
+    if (a == 0 || b == 0 || absErr < std::numeric_limits<float>::min())
+        return absErr < (kTestEpsilon * std::numeric_limits<float>::min());
+
+    return ((absErr / (absA + absB)) < kTestEpsilon);
+}
+
+bool WebCore::FloatBoxTest::ApproximatelyEqual(const FloatBox& a, const FloatBox& b)
+{
+    if (!ApproximatelyEqual(a.x(), b.x())
+        || !ApproximatelyEqual(a.y(), b.y())
+        || !ApproximatelyEqual(a.z(), b.z())
+        || !ApproximatelyEqual(a.width(), b.width())
+        || !ApproximatelyEqual(a.height(), b.height())
+        || !ApproximatelyEqual(a.depth(), b.depth())) {
+        return false;
+    }
+    return true;
+}
+
+::testing::AssertionResult WebCore::FloatBoxTest::AssertAlmostEqual(const char* m_expr, const char* n_expr, const FloatBox& m, const FloatBox& n)
+{
+    if (!ApproximatelyEqual(m, n)) {
+        return ::testing::AssertionFailure() << "       Value of:" << n_expr << std::endl
+            << "         Actual:" << testing::PrintToString(n) << std::endl
+            << "Expected Approx:" << m_expr << std::endl
+            << "       Which is:" << ::testing::PrintToString(m);
+    }
+    return ::testing::AssertionSuccess();
+}
+
+::testing::AssertionResult WebCore::FloatBoxTest::AssertContains(const char* m_expr, const char* n_expr, const FloatBox& m, const FloatBox& n)
+{
+    FloatBox newM = m;
+    newM.expandTo(n);
+    if (!ApproximatelyEqual(m, newM)) {
+        return ::testing::AssertionFailure() << "        Value of:" << n_expr << std::endl
+            << "          Actual:" << testing::PrintToString(n) << std::endl
+            << "Not Contained in:" << m_expr << std::endl
+            << "        Which is:" << ::testing::PrintToString(m);
+    }
+    return ::testing::AssertionSuccess();
+}
+
+