atlas_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_ATLAS_CONTENTS_H_
#define FLUTTER_IMPELLER_ENTITY_CONTENTS_ATLAS_CONTENTS_H_
 
#include <functional>
#include <memory>
#include <vector>
 
#include "impeller/core/sampler_descriptor.h"
#include "impeller/entity/contents/contents.h"
#include "impeller/entity/entity.h"
 
namespace impeller {
 
class AtlasContents final : public Contents {
 public:
  explicit AtlasContents();
 
  ~AtlasContents() override;
 
  void SetTexture(std::shared_ptr<Texture> texture);
 
  std::shared_ptr<Texture> GetTexture() const;
 
  void SetTransforms(std::vector<Matrix> transforms);
 
  void SetBlendMode(BlendMode blend_mode);
 
  void SetTextureCoordinates(std::vector<Rect> texture_coords);
 
  void SetColors(std::vector<Color> colors);
 
  void SetCullRect(std::optional<Rect> cull_rect);
 
  void SetSamplerDescriptor(SamplerDescriptor desc);
 
  void SetAlpha(Scalar alpha);
 
  const SamplerDescriptor& GetSamplerDescriptor() const;
 
  const std::vector<Matrix>& GetTransforms() const;
 
  const std::vector<Rect>& GetTextureCoordinates() const;
 
  const std::vector<Color>& GetColors() const;
 
  // |Contents|
  std::optional<Rect> GetCoverage(const Entity& entity) const override;
 
  // |Contents|
  bool Render(const ContentContext& renderer,
              const Entity& entity,
              RenderPass& pass) const override;
 
 private:
  Rect ComputeBoundingBox() const;
 
  std::shared_ptr<Texture> texture_;
  std::vector<Rect> texture_coords_;
  std::vector<Color> colors_;
  std::vector<Matrix> transforms_;
  BlendMode blend_mode_;
  std::optional<Rect> cull_rect_;
  Scalar alpha_ = 1.0;
  SamplerDescriptor sampler_descriptor_ = {};
  mutable std::optional<Rect> bounding_box_cache_;
 
  AtlasContents(const AtlasContents&) = delete;
 
  AtlasContents& operator=(const AtlasContents&) = delete;
};
 
}  // namespace impeller
 
#endif  // FLUTTER_IMPELLER_ENTITY_CONTENTS_ATLAS_CONTENTS_H_