GetPixelRGBO     8494 coders/png.c                          GetPixelRGBO(q, transparent);
GetPixelRGBO     8516 coders/png.c                          GetPixelRGBO(q, transparent+i);
GetPixelRGBO     8526 coders/png.c                          GetPixelRGBO(q, semitransparent);
GetPixelRGBO     8542 coders/png.c                          GetPixelRGBO(q, semitransparent+i);