gdSinkPtr         512 gd/libgd/gd.h  void gdImagePngToSink(gdImagePtr im, gdSinkPtr out);
gdSinkPtr         634 gd/libgd/gd.h  gdIOCtx* gdNewSSCtx(gdSourcePtr in, gdSinkPtr out);
gdSinkPtr          36 gd/libgd/gd_io_ss.c 	gdSinkPtr snk;