transform_layer.h

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// 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_LAYERS_TRANSFORM_LAYER_H_
#define FLUTTER_FLOW_LAYERS_TRANSFORM_LAYER_H_
 
#include "flutter/flow/layers/container_layer.h"
 
namespace flutter {
 
// Be careful that SkMatrix's default constructor doesn't initialize the matrix
// at all. Hence |set_transform| must be called with an initialized SkMatrix.
class TransformLayer : public ContainerLayer {
 public:
  explicit TransformLayer(const SkMatrix& transform)
      : TransformLayer(SkM44(transform)) {}
  explicit TransformLayer(const SkM44& transform);
 
  void Diff(DiffContext* context, const Layer* old_layer) override;
 
  void Preroll(PrerollContext* context) override;
 
  void Paint(PaintContext& context) const override;
 
 private:
  SkM44 transform_;
 
  FML_DISALLOW_COPY_AND_ASSIGN(TransformLayer);
};
 
}  // namespace flutter
 
#endif  // FLUTTER_FLOW_LAYERS_TRANSFORM_LAYER_H_