entity_pass_target.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_ENTITY_PASS_TARGET_H_
#define FLUTTER_IMPELLER_ENTITY_ENTITY_PASS_TARGET_H_
 
#include "impeller/entity/contents/content_context.h"
#include "impeller/renderer/render_target.h"
 
namespace impeller {
 
class InlinePassContext;
 
class EntityPassTarget {
 public:
  explicit EntityPassTarget(const RenderTarget& render_target,
                            bool supports_read_from_resolve,
                            bool supports_implicit_msaa);
 
  /// @brief  Flips the backdrop and returns a readable texture that can be
  ///         bound/sampled to restore the previous pass.
  ///
  ///         After this method is called, a new `RenderPass` that attaches the
  ///         result of `GetRenderTarget` is guaranteed to be able to read the
  ///         previous pass's backdrop texture (which is returned by this
  ///         method).
  std::shared_ptr<Texture> Flip(const ContentContext& renderer);
 
  RenderTarget& GetRenderTarget();
 
  /// @brief Remove the cached secondary color texture.
  void RemoveSecondary();
 
  bool IsValid() const;
 
 private:
  RenderTarget target_;
  std::shared_ptr<Texture> secondary_color_texture_;
 
  bool supports_read_from_resolve_;
  bool supports_implicit_msaa_;
 
  friend InlinePassContext;
 
  EntityPassTarget& operator=(const EntityPassTarget&) = delete;
};
 
}  // namespace impeller
 
#endif  // FLUTTER_IMPELLER_ENTITY_ENTITY_PASS_TARGET_H_