guest/hals/hwcomposer/cpu_composer.h

/*
 * Copyright (C) 2016 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#pragma once

#include <cstdint>
#include <vector>

#include <hardware/gralloc.h>

#include "guest/hals/hwcomposer/base_composer.h"
#include "guest/hals/hwcomposer/hwcomposer.h"

namespace cuttlefish {

class CpuComposer : public BaseComposer {
 public:
  CpuComposer(std::unique_ptr<ScreenView> screen_view);
  virtual ~CpuComposer() = default;

  // override
  int PrepareLayers(size_t num_layers, hwc_layer_1_t* layers) override;
  // override
  int SetLayers(size_t num_layers, hwc_layer_1_t* layers) override;

 protected:
  static const int kNumTmpBufferPieces;
  uint8_t* GetRotatingTmpBuffer(std::size_t needed_size,
                                std::uint32_t order);
  uint8_t* GetSpecialTmpBuffer(size_t needed_size);
  bool CanCompositeLayer(const hwc_layer_1_t& layer);
  void CompositeLayer(hwc_layer_1_t* src_layer,
                      std::uint8_t* dst_buffer,
                      std::uint32_t dst_width,
                      std::uint32_t dst_height,
                      std::uint32_t dst_stride_bytes,
                      std::uint32_t dst_bpp);
  std::vector<uint8_t> tmp_buffer_;
  std::vector<uint8_t> special_tmp_buffer_;
};

}  // namespace cuttlefish