| // Copyright 2013 The Flutter 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 FLUTTER_FLOW_MATRIX_DECOMPOSITION_H_ |
| #define FLUTTER_FLOW_MATRIX_DECOMPOSITION_H_ |
| |
| #include "flutter/fml/macros.h" |
| #include "third_party/skia/include/core/SkMatrix.h" |
| #include "third_party/skia/include/core/SkMatrix44.h" |
| #include "third_party/skia/include/core/SkPoint3.h" |
| |
| namespace flutter { |
| |
| /// Decomposes a given non-degenerate transformation matrix into a sequence of |
| /// operations that produced it. The validity of the decomposition must always |
| /// be checked before attempting to access any of the decomposed elements. |
| class MatrixDecomposition { |
| public: |
| MatrixDecomposition(const SkMatrix& matrix); |
| |
| MatrixDecomposition(SkMatrix44 matrix); |
| |
| ~MatrixDecomposition(); |
| |
| bool IsValid() const; |
| |
| const SkVector3& translation() const { return translation_; } |
| |
| const SkVector3& scale() const { return scale_; } |
| |
| const SkVector3& shear() const { return shear_; } |
| |
| const SkVector4& perspective() const { return perspective_; } |
| |
| const SkVector4& rotation() const { return rotation_; } |
| |
| private: |
| bool valid_; |
| SkVector3 translation_; |
| SkVector3 scale_; |
| SkVector3 shear_; |
| SkVector4 perspective_; |
| SkVector4 rotation_; |
| |
| FML_DISALLOW_COPY_AND_ASSIGN(MatrixDecomposition); |
| }; |
| |
| } // namespace flutter |
| |
| #endif // FLUTTER_FLOW_MATRIX_DECOMPOSITION_H_ |