vertices_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_VERTICES_CONTENTS_H_
#define FLUTTER_IMPELLER_ENTITY_CONTENTS_VERTICES_CONTENTS_H_
 
#include <memory>
 
#include "impeller/core/sampler_descriptor.h"
#include "impeller/entity/contents/contents.h"
#include "impeller/entity/entity.h"
#include "impeller/entity/geometry/vertices_geometry.h"
#include "impeller/geometry/color.h"
 
namespace impeller {
 
/// A vertices contents for (optional) per-color vertices + texture and any
/// blend mode.
class VerticesSimpleBlendContents final : public Contents {
 public:
  VerticesSimpleBlendContents();
 
  ~VerticesSimpleBlendContents() override;
 
  using LazyTexture =
      std::function<std::shared_ptr<Texture>(const ContentContext& renderer)>;
 
  void SetGeometry(std::shared_ptr<VerticesGeometry> geometry);
 
  void SetAlpha(Scalar alpha);
 
  void SetBlendMode(BlendMode blend_mode);
 
  void SetTexture(std::shared_ptr<Texture> texture);
 
  void SetLazyTexture(const LazyTexture& lazy_texture);
 
  void SetSamplerDescriptor(const SamplerDescriptor& descriptor);
 
  void SetTileMode(Entity::TileMode tile_mode_x, Entity::TileMode tile_mode_y);
 
  void SetEffectTransform(Matrix transform);
 
  void SetLazyTextureCoverage(Rect rect);
 
  // |Contents|
  std::optional<Rect> GetCoverage(const Entity& entity) const override;
 
  // |Contents|
  bool Render(const ContentContext& renderer,
              const Entity& entity,
              RenderPass& pass) const override;
 
 private:
  Scalar alpha_ = 1.0;
  std::shared_ptr<VerticesGeometry> geometry_;
  std::shared_ptr<Texture> texture_;
  BlendMode blend_mode_ = BlendMode::kSrc;
  SamplerDescriptor descriptor_ = {};
  Entity::TileMode tile_mode_x_ = Entity::TileMode::kClamp;
  Entity::TileMode tile_mode_y_ = Entity::TileMode::kClamp;
  Matrix inverse_matrix_ = {};
  std::optional<Rect> lazy_texture_coverage_;
  LazyTexture lazy_texture_;
 
  VerticesSimpleBlendContents(const VerticesSimpleBlendContents&) = delete;
 
  VerticesSimpleBlendContents& operator=(const VerticesSimpleBlendContents&) =
      delete;
};
 
}  // namespace impeller
 
#endif  // FLUTTER_IMPELLER_ENTITY_CONTENTS_VERTICES_CONTENTS_H_