1/*
2 * Copyright (C) 2012 Google Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1.  Redistributions of source code must retain the above copyright
8 *     notice, this list of conditions and the following disclaimer.
9 * 2.  Redistributions in binary form must reproduce the above copyright
10 *     notice, this list of conditions and the following disclaimer in the
11 *     documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
15 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
16 * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
17 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
18 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
19 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
20 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
22 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
23 */
24
25#ifndef WebTransformOperations_h
26#define WebTransformOperations_h
27
28class SkMatrix44;
29
30#define WEB_TRANSFORM_OPERATIONS_IS_VIRTUAL 1
31
32namespace blink {
33
34class WebTransformOperations {
35public:
36    virtual ~WebTransformOperations() { }
37
38    // Returns true if these operations can be blended. It will only return
39    // false if we must resort to matrix interpolation, and matrix interpolation
40    // fails (this can happen if either matrix cannot be decomposed).
41    virtual bool canBlendWith(const WebTransformOperations& other) const = 0;
42
43    virtual void appendTranslate(double x, double y, double z) = 0;
44    virtual void appendRotate(double x, double y, double z, double degrees) = 0;
45    virtual void appendScale(double x, double y, double z) = 0;
46    virtual void appendSkew(double x, double y) = 0;
47    virtual void appendPerspective(double depth) = 0;
48    virtual void appendMatrix(const SkMatrix44&) = 0;
49    virtual void appendIdentity() = 0;
50
51    virtual bool isIdentity() const = 0;
52};
53
54} // namespace blink
55
56#endif // WebTransformOperations_h
57
58