gdSinkPtr         631 libgd/gd.h     void gdImagePngToSink(gdImagePtr im, gdSinkPtr out);
gdSinkPtr         754 libgd/gd.h     gdIOCtx* gdNewSSCtx(gdSourcePtr in, gdSinkPtr out);
gdSinkPtr          36 libgd/gd_io_ss.c 	gdSinkPtr snk;