| errors | Package errors implements functions to manipulate errors. |
| fmt | Package fmt implements formatted I/O with functions analogous to C's printf and scanf. |
| github.com/golang/freetype/raster | Package raster provides an anti-aliasing 2-D rasterizer. |
| github.com/golang/freetype/truetype | Package truetype provides a parser for the TTF and TTC file formats. |
| golang.org/x/image/draw | Package draw provides image composition functions. |
| golang.org/x/image/font | Package font defines an interface for font faces, for drawing text on an image. |
| golang.org/x/image/font/basicfont | Package basicfont provides fixed-size font faces. |
| golang.org/x/image/math/f64 | Package f64 implements float64 vector and matrix types. |
| golang.org/x/image/math/fixed | Package fixed implements fixed-point integer types. |
| image | Package image implements a basic 2-D image library. |
| image/color | Package color implements a basic color library. |
| image/draw | Package draw provides image composition functions. |
| image/jpeg | Package jpeg implements a JPEG image decoder and encoder. |
| image/png | Package png implements a PNG image decoder and encoder. |
| io | Package io provides basic interfaces to I/O primitives. |
| io/ioutil | Package ioutil implements some I/O utility functions. |
| math | Package math provides basic constants and mathematical functions. |
| os | Package os provides a platform-independent interface to operating system functionality. |
| sort | Package sort provides primitives for sorting slices and user-defined collections. |
| strings | Package strings implements simple functions to manipulate UTF-8 encoded strings. |
| unicode | Package unicode provides data and functions to test some properties of Unicode code points. |