gdk-pixbuf:pixbuf-pixels-with-length (pixbuf length)

pixbuf -- a gdk-pixbuf:pixbuf object
length -- an unsigned integer with the length of the binary data

The pointer to the pixel data of the pixbuf.

Queries a pointer to the pixel data of a pixbuf. Please see the section on image data in the gdk-pixbuf:pixbuf documentation for information about how the pixel data is stored in memory. This function will cause an implicit copy of the pixbuf data if the pixbuf was created from read-only data.