1 files changed, 56 insertions, 0 deletions
diff --git a/cc/CCAnimationCurve.h b/cc/CCAnimationCurve.h
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--- /dev/null
+++ b/cc/CCAnimationCurve.h
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+// Copyright 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CCAnimationCurve_h
+#define CCAnimationCurve_h
+
+#include <public/WebTransformationMatrix.h>
+#include <wtf/PassOwnPtr.h>
+
+namespace WebCore {
+
+class CCFloatAnimationCurve;
+class CCTransformAnimationCurve;
+class IntSize;
+class TransformOperations;
+
+// An animation curve is a function that returns a value given a time.
+// There are currently only two types of curve, float and transform.
+class CCAnimationCurve {
+public:
+    enum Type { Float, Transform };
+
+    virtual ~CCAnimationCurve() { }
+
+    virtual double duration() const = 0;
+    virtual Type type() const = 0;
+    virtual PassOwnPtr<CCAnimationCurve> clone() const = 0;
+
+    const CCFloatAnimationCurve* toFloatAnimationCurve() const;
+    const CCTransformAnimationCurve* toTransformAnimationCurve() const;
+};
+
+class CCFloatAnimationCurve : public CCAnimationCurve {
+public:
+    virtual ~CCFloatAnimationCurve() { }
+
+    virtual float getValue(double t) const = 0;
+
+    // Partial CCAnimation implementation.
+    virtual Type type() const OVERRIDE { return Float; }
+};
+
+class CCTransformAnimationCurve : public CCAnimationCurve {
+public:
+    virtual ~CCTransformAnimationCurve() { }
+
+    virtual WebKit::WebTransformationMatrix getValue(double t) const = 0;
+
+    // Partial CCAnimation implementation.
+    virtual Type type() const OVERRIDE { return Transform; }
+};
+
+} // namespace WebCore
+
+#endif // CCAnimation_h