color_matrix_filter_contents.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_IMPELLER_ENTITY_CONTENTS_FILTERS_COLOR_MATRIX_FILTER_CONTENTS_H_
#define FLUTTER_IMPELLER_ENTITY_CONTENTS_FILTERS_COLOR_MATRIX_FILTER_CONTENTS_H_
 
#include <memory>
#include <optional>
 
#include "impeller/entity/contents/filters/color_filter_contents.h"
#include "impeller/entity/contents/filters/inputs/filter_input.h"
 
namespace impeller {
 
// Look at example at: https://github.com/flutter/impeller/pull/132
 
class ColorMatrixFilterContents final : public ColorFilterContents {
 public:
  ColorMatrixFilterContents();
 
  ~ColorMatrixFilterContents() override;
 
  void SetMatrix(const ColorMatrix& matrix);
 
 private:
  // |FilterContents|
  std::optional<Entity> RenderFilter(
      const FilterInput::Vector& input_textures,
      const ContentContext& renderer,
      const Entity& entity,
      const Matrix& effect_transform,
      const Rect& coverage,
      const std::optional<Rect>& coverage_hint) const override;
 
  ColorMatrix matrix_;
 
  ColorMatrixFilterContents(const ColorMatrixFilterContents&) = delete;
 
  ColorMatrixFilterContents& operator=(const ColorMatrixFilterContents&) =
      delete;
};
 
}  // namespace impeller
 
#endif  // FLUTTER_IMPELLER_ENTITY_CONTENTS_FILTERS_COLOR_MATRIX_FILTER_CONTENTS_H_