gdImagePngToSink  631 ext/gd/libgd/gd.h void gdImagePngToSink(gdImagePtr im, gdSinkPtr out);
gdImagePngToSink   11 ext/gd/libgd/gd_ss.c extern void gdImagePngToSink (gdImagePtr im, gdSinkPtr out);
gdImagePngToSink  187 ext/gd/libgd/gdtest.c   gdImagePngToSink (im, &imgsnk);