inline_pass_context.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.
 
#pragma once
 
#include "impeller/entity/entity_pass_target.h"
#include "impeller/renderer/context.h"
#include "impeller/renderer/render_pass.h"
#include "impeller/renderer/render_target.h"
 
namespace impeller {
 
class InlinePassContext {
 public:
  struct RenderPassResult {
    std::shared_ptr<RenderPass> pass;
    std::shared_ptr<Texture> backdrop_texture;
  };
 
  InlinePassContext(
      std::shared_ptr<Context> context,
      EntityPassTarget& pass_target,
      uint32_t pass_texture_reads,
      std::optional<RenderPassResult> collapsed_parent_pass = std::nullopt);
  ~InlinePassContext();
 
  bool IsValid() const;
  bool IsActive() const;
  std::shared_ptr<Texture> GetTexture();
  bool EndPass();
  EntityPassTarget& GetPassTarget() const;
  uint32_t GetPassCount() const;
 
  RenderPassResult GetRenderPass(uint32_t pass_depth);
 
 private:
  std::shared_ptr<Context> context_;
  EntityPassTarget& pass_target_;
  std::shared_ptr<CommandBuffer> command_buffer_;
  std::shared_ptr<RenderPass> pass_;
  uint32_t pass_count_ = 0;
  uint32_t total_pass_reads_ = 0;
  // Whether this context is collapsed into a parent entity pass.
  bool is_collapsed_ = false;
 
  FML_DISALLOW_COPY_AND_ASSIGN(InlinePassContext);
};
 
}  // namespace impeller