color_source.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_TOOLKIT_INTEROP_COLOR_SOURCE_H_
#define FLUTTER_IMPELLER_TOOLKIT_INTEROP_COLOR_SOURCE_H_
 
#include <vector>
 
#include "flutter/display_list/effects/dl_color_source.h"
#include "impeller/geometry/color.h"
#include "impeller/geometry/matrix.h"
#include "impeller/geometry/point.h"
#include "impeller/toolkit/interop/formats.h"
#include "impeller/toolkit/interop/fragment_program.h"
#include "impeller/toolkit/interop/impeller.h"
#include "impeller/toolkit/interop/object.h"
#include "impeller/toolkit/interop/texture.h"
 
namespace impeller::interop {
 
class ColorSource final
    : public Object<ColorSource,
                    IMPELLER_INTERNAL_HANDLE_NAME(ImpellerColorSource)> {
 public:
  static ScopedObject<ColorSource> MakeLinearGradient(
      const Point& start_point,
      const Point& end_point,
      const std::vector<flutter::DlColor>& colors,
      const std::vector<Scalar>& stops,
      flutter::DlTileMode tile_mode,
      const Matrix& transformation);
 
  static ScopedObject<ColorSource> MakeRadialGradient(
      const Point& center,
      Scalar radius,
      const std::vector<flutter::DlColor>& colors,
      const std::vector<Scalar>& stops,
      flutter::DlTileMode tile_mode,
      const Matrix& transformation);
 
  static ScopedObject<ColorSource> MakeConicalGradient(
      const Point& start_center,
      Scalar start_radius,
      const Point& end_center,
      Scalar end_radius,
      const std::vector<flutter::DlColor>& colors,
      const std::vector<Scalar>& stops,
      flutter::DlTileMode tile_mode,
      const Matrix& transformation);
 
  static ScopedObject<ColorSource> MakeSweepGradient(
      const Point& center,
      Scalar start,
      Scalar end,
      const std::vector<flutter::DlColor>& colors,
      const std::vector<Scalar>& stops,
      flutter::DlTileMode tile_mode,
      const Matrix& transformation);
 
  static ScopedObject<ColorSource> MakeImage(
      const Texture& image,
      flutter::DlTileMode horizontal_tile_mode,
      flutter::DlTileMode vertical_tile_mode,
      flutter::DlImageSampling sampling,
      const Matrix& transformation);
 
  static ScopedObject<ColorSource> MakeFragmentProgram(
      const Context& context,
      const FragmentProgram& program,
      std::vector<std::shared_ptr<flutter::DlColorSource>> samplers,
      std::shared_ptr<std::vector<uint8_t>> uniform_data);
 
  explicit ColorSource(std::shared_ptr<flutter::DlColorSource> source);
 
  ~ColorSource() override;
 
  ColorSource(const ColorSource&) = delete;
 
  ColorSource& operator=(const ColorSource&) = delete;
 
  bool IsValid() const;
 
  const std::shared_ptr<flutter::DlColorSource>& GetColorSource() const;
 
 private:
  std::shared_ptr<flutter::DlColorSource> color_source_;
};
 
}  // namespace impeller::interop
 
#endif  // FLUTTER_IMPELLER_TOOLKIT_INTEROP_COLOR_SOURCE_H_