gistfile1.txt

void writeBuffer(char *pPath, uint8_t *pBuffer, int width, int height, int channels) {
  int x, y, j, c;
  FILE *p = fopen(pPath, "wb");
  for (y = 0; y < height; y++) {
    for (x = 0; x < width; x++) {
      for (c = 0; c < channels; c++) {
        uint8_t buf[1];
        j = (y * width + x) * channels + c;
        buf[0] = pBuffer[j];
        fwrite(buf, 1, sizeof(buf), p); 
      }   
    }   
  }
  fclose(p);
}

void readBuffer(char *pPath, uint8_t *pBuffer, int width, int height, int channels) {
  int x, y, j, c;
  FILE *p = fopen(pPath, "rb");
  for (y = 0; y < height; y++) {
    for (x = 0; x < width; x++) {
      for (c = 0; c < channels; c++) {
        uint8_t buf[1];
        fread(buf, 1, sizeof(buf), p); 

        j = (y * width + x) * channels + c;
        pBuffer[j] = buf[0];
      }
    }
  }
  fclose(p);
}