Function stbi_write_bmp_core

tutorials/common/image/stb_image_write.h:492–510

}

static int stbi_write_bmp_core(stbi__write_context *s, int x, int y, int comp, const void *data)
{
   if (comp != 4) {
      // write RGB bitmap
      int pad = (-x*3) & 3;
      return stbiw__outfile(s,-1,-1,x,y,comp,1,(void *) data,0,pad,
              "11 4 22 4" "4 44 22 444444",
              'B', 'M', 14+40+(x*3+pad)*y, 0,0, 14+40,  // file header
               40, x,y, 1,24, 0,0,0,0,0,0);             // bitmap header
   } else {
      // RGBA bitmaps need a v4 header
      // use BI_BITFIELDS mode with 32bpp and alpha mask
      // (straight BI_RGB with alpha mask doesn't work in most readers)
      return stbiw__outfile(s,-1,-1,x,y,comp,1,(void *)data,1,0,
         "11 4 22 4" "4 44 22 444444 4444 4 444 444 444 444",
         'B', 'M', 14+108+x*y*4, 0, 0, 14+108, // file header
         108, x,y, 1,32, 3,0,0,0,0,0, 0xff0000,0xff00,0xff,0xff000000u, 0, 0,0,0, 0,0,0, 0,0,0, 0,0,0); // bitmap V4 header
   }
}

STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data)
{