| 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. |
| golang.org/x/image/font | Package font defines an interface for font faces, for drawing text on an image. |
| golang.org/x/image/math/fixed | Package fixed implements fixed-point integer types. |
| image | Package image implements a basic 2-D image library. |
| math | Package math provides basic constants and mathematical functions. |