Define cc::TransformOperations and webkit::WebTransformOperationsImpl

cc/transform_operation.h

+// Copyright 2013 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 CC_TRANSFORM_OPERATION_H_
+#define CC_TRANSFORM_OPERATION_H
+
+#include "third_party/WebKit/Source/Platform/chromium/public/WebTransformationMatrix.h"
+
+namespace cc {
+
+struct TransformOperation {
+  enum Type {
+    TransformOperationTranslate,
+    TransformOperationRotate,
+    TransformOperationScale,
+    TransformOperationSkew,
+    TransformOperationPerspective,
+    TransformOperationMatrix,
+    TransformOperationIdentity
+  };
+
+  TransformOperation()
+      : type(TransformOperationIdentity) {
+  }
+
+  Type type;
+  WebKit::WebTransformationMatrix matrix;
+
+  union {
+    double perspective_depth;
+
+    struct {
+      double x, y;
+    } skew;
+
+    struct {
+      double x, y, z;
+    } scale;
+
+    struct {
+      double x, y, z;
+    } translate;
+
+    struct {
+      struct {
+        double x, y, z;
+      } axis;
+
+      double angle;
+    } rotate;
+  };
+
+  bool IsIdentity() const;
+  static bool BlendTransformOperations(const TransformOperation* from,
+                                       const TransformOperation* to,
+                                       double progress,
+                                       WebKit::WebTransformationMatrix& result);
+};
+
+}  // namespace cc
+
+#endif  // CC_TRANSFORM_OPERATION_H_