gdImagePngToSink  512 gd/libgd/gd.h  void gdImagePngToSink(gdImagePtr im, gdSinkPtr out);
gdImagePngToSink   11 gd/libgd/gd_ss.c extern void gdImagePngToSink (gdImagePtr im, gdSinkPtr out);
gdImagePngToSink  187 gd/libgd/gdtest.c   gdImagePngToSink (im, &imgsnk);