composer/hwc_buffer_allocator.h

/*
 * Copyright (c) 2015-2020, The Linux Foundation. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *  * Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *  * Redistributions in binary form must reproduce the above
 *    copyright notice, this list of conditions and the following
 *    disclaimer in the documentation and/or other materials provided
 *    with the distribution.
 *  * Neither the name of The Linux Foundation nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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 */
#ifndef __HWC_BUFFER_ALLOCATOR_H__
#define __HWC_BUFFER_ALLOCATOR_H__

#include <fcntl.h>
#include <sys/mman.h>

#include <android/hardware/graphics/allocator/2.0/IAllocator.h>
#include <android/hardware/graphics/allocator/3.0/IAllocator.h>
#include <android/hardware/graphics/mapper/2.1/IMapper.h>
#include <android/hardware/graphics/mapper/3.0/IMapper.h>
#include "gralloc_priv.h"

using IAllocatorV3 = android::hardware::graphics::allocator::V3_0::IAllocator;
using IAllocatorV2 = android::hardware::graphics::allocator::V2_0::IAllocator;
using IMapperV3 = android::hardware::graphics::mapper::V3_0::IMapper;
using IMapperV2 = android::hardware::graphics::mapper::V2_0::IMapper;
namespace sdm {

template <class Type>
inline Type ALIGN(Type x, Type align) {
  return (x + align - 1) & ~(align - 1);
}

class HWCBufferAllocator : public BufferAllocator {
 public:
  int AllocateBuffer(BufferInfo *buffer_info);
  int FreeBuffer(BufferInfo *buffer_info);
  uint32_t GetBufferSize(BufferInfo *buffer_info);

  void GetCustomWidthAndHeight(const private_handle_t *handle, int *width, int *height);
  void GetAlignedWidthAndHeight(int width, int height, int format, uint32_t alloc_type,
                                int *aligned_width, int *aligned_height);
  int GetAllocatedBufferInfo(const BufferConfig &buffer_config,
                                      AllocatedBufferInfo *allocated_buffer_info);
  int GetBufferLayout(const AllocatedBufferInfo &buf_info, uint32_t stride[4],
                               uint32_t offset[4], uint32_t *num_planes);
  int SetBufferInfo(LayerBufferFormat format, int *target, uint64_t *flags);
  int MapBuffer(const private_handle_t *handle, shared_ptr<Fence> acquire_fence);
  int UnmapBuffer(const private_handle_t *handle, int *release_fence);

 private:
  int GetGrallocInstance();
  android::sp<IMapperV2> mapper_V2_;
  android::sp<IMapperV3> mapper_V3_;
  android::sp<IAllocatorV2> allocator_V2_;
  android::sp<IAllocatorV3> allocator_V3_;
};

}  // namespace sdm
#endif  // __HWC_BUFFER_ALLOCATOR_H__