blit_pass_gles.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 <memory>
 
#include "flutter/fml/macros.h"
#include "flutter/impeller/base/config.h"
#include "flutter/impeller/renderer/backend/gles/reactor_gles.h"
#include "flutter/impeller/renderer/blit_pass.h"
#include "impeller/renderer/backend/gles/blit_command_gles.h"
 
namespace impeller {
 
class BlitPassGLES final : public BlitPass,
                           public std::enable_shared_from_this<BlitPassGLES> {
 public:
  // |BlitPass|
  ~BlitPassGLES() override;
 
 private:
  friend class CommandBufferGLES;
 
  std::vector<std::unique_ptr<BlitEncodeGLES>> commands_;
  ReactorGLES::Ref reactor_;
  std::string label_;
  bool is_valid_ = false;
 
  explicit BlitPassGLES(ReactorGLES::Ref reactor);
 
  // |BlitPass|
  bool IsValid() const override;
 
  // |BlitPass|
  void OnSetLabel(std::string label) override;
 
  // |BlitPass|
  bool EncodeCommands(
      const std::shared_ptr<Allocator>& transients_allocator) const override;
 
  // |BlitPass|
  bool OnCopyTextureToTextureCommand(std::shared_ptr<Texture> source,
                                     std::shared_ptr<Texture> destination,
                                     IRect source_region,
                                     IPoint destination_origin,
                                     std::string label) override;
 
  // |BlitPass|
  bool OnCopyTextureToBufferCommand(std::shared_ptr<Texture> source,
                                    std::shared_ptr<DeviceBuffer> destination,
                                    IRect source_region,
                                    size_t destination_offset,
                                    std::string label) override;
 
  // |BlitPass|
  bool OnCopyBufferToTextureCommand(BufferView source,
                                    std::shared_ptr<Texture> destination,
                                    IPoint destination_origin,
                                    std::string label) override {
    IMPELLER_UNIMPLEMENTED;
    return false;
  }
  // |BlitPass|
  bool OnGenerateMipmapCommand(std::shared_ptr<Texture> texture,
                               std::string label) override;
 
  FML_DISALLOW_COPY_AND_ASSIGN(BlitPassGLES);
};
 
}  // namespace impeller