vertices_contents.h

Go to the documentation of this file.

// 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.
 
#pragma once
 
#include <functional>
#include <memory>
#include <vector>
 
#include "flutter/fml/macros.h"
#include "impeller/core/sampler_descriptor.h"
#include "impeller/entity/contents/contents.h"
#include "impeller/entity/entity.h"
#include "impeller/entity/geometry/geometry.h"
#include "impeller/entity/geometry/vertices_geometry.h"
#include "impeller/geometry/color.h"
#include "impeller/geometry/path.h"
#include "impeller/geometry/point.h"
 
namespace impeller {
 
class VerticesContents final : public Contents {
 public:
  VerticesContents();
 
  ~VerticesContents() override;
 
  void SetGeometry(std::shared_ptr<VerticesGeometry> geometry);
 
  void SetAlpha(Scalar alpha);
 
  void SetBlendMode(BlendMode blend_mode);
 
  void SetSourceContents(std::shared_ptr<Contents> contents);
 
  std::shared_ptr<VerticesGeometry> GetGeometry() const;
 
  const std::shared_ptr<Contents>& GetSourceContents() 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:
  Scalar alpha_;
  std::shared_ptr<VerticesGeometry> geometry_;
  BlendMode blend_mode_ = BlendMode::kSource;
  std::shared_ptr<Contents> src_contents_;
 
  FML_DISALLOW_COPY_AND_ASSIGN(VerticesContents);
};
 
class VerticesColorContents final : public Contents {
 public:
  explicit VerticesColorContents(const VerticesContents& parent);
 
  ~VerticesColorContents() override;
 
  // |Contents|
  std::optional<Rect> GetCoverage(const Entity& entity) const override;
 
  // |Contents|
  bool Render(const ContentContext& renderer,
              const Entity& entity,
              RenderPass& pass) const override;
 
  void SetAlpha(Scalar alpha);
 
 private:
  const VerticesContents& parent_;
  Scalar alpha_ = 1.0;
 
  FML_DISALLOW_COPY_AND_ASSIGN(VerticesColorContents);
};
 
class VerticesUVContents final : public Contents {
 public:
  explicit VerticesUVContents(const VerticesContents& parent);
 
  ~VerticesUVContents() override;
 
  // |Contents|
  std::optional<Rect> GetCoverage(const Entity& entity) const override;
 
  // |Contents|
  bool Render(const ContentContext& renderer,
              const Entity& entity,
              RenderPass& pass) const override;
 
  void SetAlpha(Scalar alpha);
 
 private:
  const VerticesContents& parent_;
  Scalar alpha_ = 1.0;
 
  FML_DISALLOW_COPY_AND_ASSIGN(VerticesUVContents);
};
 
}  // namespace impeller