text: /* Copyright (c) 2019, NVIDIA CORPORATION. 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 NVIDIA CORPORATION 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 BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
   * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   * PURPOSE 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 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
   * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
   * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  #pragma once
  
  #include <stdio.h>
  
  inline void saveBMP(const char* bmpfilename, int width, int height, const unsigned char* bgra)
  {
  #pragma pack(push, 1)
    struct
    {
      unsigned short bfType;
      unsigned int   bfSize;
      unsigned int   bfReserved;
      unsigned int   bfOffBits;
  
      unsigned int   biSize;
      signed int     biWidth;
      signed int     biHeight;
      unsigned short biPlanes;
      unsigned short biBitCount;
      unsigned int   biCompression;
      unsigned int   biSizeImage;
      signed int     biXPelsPerMeter;
      signed int     biYPelsPerMeter;
      unsigned int   biClrUsed;
      unsigned int   biClrImportant;
    } bmpinfo;
  #pragma pack(pop)
  
    bmpinfo.bfType     = 19778;
    bmpinfo.bfSize     = sizeof(bmpinfo) + width * height * 4 * sizeof(unsigned char);
    bmpinfo.bfReserved = 0;
    bmpinfo.bfOffBits  = 54;
  
    bmpinfo.biSize          = 40;
    bmpinfo.biWidth         = width;
    bmpinfo.biHeight        = height;
    bmpinfo.biPlanes        = 1;
    bmpinfo.biBitCount      = 32;
    bmpinfo.biCompression   = 0;
    bmpinfo.biSizeImage     = 0;
    bmpinfo.biXPelsPerMeter = 0;
    bmpinfo.biYPelsPerMeter = 0;
    bmpinfo.biClrUsed       = 0;
    bmpinfo.biClrImportant  = 0;
  
    FILE* bmpfile = fopen(bmpfilename, "wb");
    fwrite(&bmpinfo, sizeof(bmpinfo), 1, bmpfile);
    fwrite(bgra, sizeof(char), width * height * 4 * sizeof(unsigned char), bmpfile);
    fclose(bmpfile);
  }