| bytes | Package bytes implements functions for the manipulation of byte slices. |
| fmt | Package fmt implements formatted I/O with functions analogous to C's printf and scanf. |
| gioui.org/font | Package font provides type describing font faces attributes. |
| github.com/go-text/typesetting/font | Package font provides an high level API to access Opentype font properties. |
| github.com/go-text/typesetting/font/opentype | Package opentype provides the low level routines required to read and write Opentype font files, including collections. |
| image/png | Package png implements a PNG image decoder and encoder. |