c_gdk_pixbuf_calculate_rowstride

Undocumented in source but is binding to C. You might be able to learn more by searching the web for its name.
__gshared extern (C)
int function(GdkColorspace colorspace, int hasAlpha, int bitsPerSample, int width, int height) c_gdk_pixbuf_calculate_rowstride;

Meta