blob: 81794c2fe589f1ea57cc00a2ffd940cb32c64c7c [file] [log] [blame]
// 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_