1 | // Copyright 2013 The Flutter Authors. All rights reserved. |
2 | // Use of this source code is governed by a BSD-style license that can be |
3 | // found in the LICENSE file. |
4 | |
5 | #ifndef FLUTTER_FLOW_MATRIX_DECOMPOSITION_H_ |
6 | #define FLUTTER_FLOW_MATRIX_DECOMPOSITION_H_ |
7 | |
8 | #include "flutter/fml/macros.h" |
9 | #include "third_party/skia/include/core/SkM44.h" |
10 | #include "third_party/skia/include/core/SkMatrix.h" |
11 | |
12 | namespace flutter { |
13 | |
14 | /// Decomposes a given non-degenerate transformation matrix into a sequence of |
15 | /// operations that produced it. The validity of the decomposition must always |
16 | /// be checked before attempting to access any of the decomposed elements. |
17 | class MatrixDecomposition { |
18 | public: |
19 | MatrixDecomposition(const SkMatrix& matrix); |
20 | |
21 | MatrixDecomposition(SkM44 matrix); |
22 | |
23 | ~MatrixDecomposition(); |
24 | |
25 | bool IsValid() const; |
26 | |
27 | const SkV3& translation() const { return translation_; } |
28 | |
29 | const SkV3& scale() const { return scale_; } |
30 | |
31 | const SkV3& shear() const { return shear_; } |
32 | |
33 | const SkV4& perspective() const { return perspective_; } |
34 | |
35 | const SkV4& rotation() const { return rotation_; } |
36 | |
37 | private: |
38 | bool valid_; |
39 | SkV3 translation_; |
40 | SkV3 scale_; |
41 | SkV3 shear_; |
42 | SkV4 perspective_; |
43 | SkV4 rotation_; |
44 | |
45 | FML_DISALLOW_COPY_AND_ASSIGN(MatrixDecomposition); |
46 | }; |
47 | |
48 | } // namespace flutter |
49 | |
50 | #endif // FLUTTER_FLOW_MATRIX_DECOMPOSITION_H_ |
51 | |