1 files changed, 53 insertions, 0 deletions
diff --git a/libs/hwui/utils/MathUtils.h b/libs/hwui/utils/MathUtils.h
new file mode 100644
index 000000000000..997acde2e606
--- /dev/null
+++ b/libs/hwui/utils/MathUtils.h
@@ -0,0 +1,53 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#ifndef MATHUTILS_H
+#define MATHUTILS_H
+
+namespace android {
+namespace uirenderer {
+
+class MathUtils {
+private:
+    static const float gNonZeroEpsilon = 0.001f;
+public:
+    /**
+     * Check for floats that are close enough to zero.
+     */
+    inline static bool isZero(float value) {
+        return (value >= -gNonZeroEpsilon) && (value <= gNonZeroEpsilon);
+    }
+
+    inline static bool isPositive(float value) {
+        return value >= gNonZeroEpsilon;
+    }
+
+    inline static bool areEqual(float valueA, float valueB) {
+        return isZero(valueA - valueB);
+    }
+
+    inline static int min(int a, int b) {
+        return a < b ? a : b;
+    }
+
+    inline static float lerp(float v1, float v2, float t) {
+        return v1 + ((v2 - v1) * t);
+    }
+}; // class MathUtils
+
+} /* namespace uirenderer */
+} /* namespace android */
+
+#endif /* MATHUTILS_H */