sdm/libs/hwc/hwc_buffer_allocator.h

/*
* Copyright (c) 2015, 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 <sys/mman.h>
#include <fcntl.h>

namespace gralloc {

class IAllocController;

}  // namespace gralloc

namespace sdm {

class HWCBufferAllocator : public BufferAllocator {
 public:
  HWCBufferAllocator();

  DisplayError AllocateBuffer(BufferInfo *buffer_info);
  DisplayError FreeBuffer(BufferInfo *buffer_info);

 private:
  struct MetaBufferInfo {
    int alloc_type;              //!< Specifies allocation type set by the buffer allocator.
    void *base_addr;             //!< Specifies the base address of the allocated output buffer.
  };

  int SetBufferInfo(LayerBufferFormat format, int *target, int *flags);

  gralloc::IAllocController *alloc_controller_;
};

}  // namespace sdm
#endif  // __HWC_BUFFER_ALLOCATOR_H__