Discuss how to set fonts in Golang

A good font can make people feel very comfortable, and it is also very helpful for writing code. The developers of the Go language obviously realize this, so they provide a variety of methods for setting fonts.

Below, we will discuss how to set fonts in Golang.

1. Using the go-fonts package

The go-fonts package is a simple and easy-to-use package through which we can use common open source fonts (such as Ubuntu, Monaco, etc. ) to beautify our code. The use of this package is also very simple. You only need to add the following lines to the code:

import "github.com/visualfc/go-fonts"
func init() {  
    gofonts.Family = `Ubuntu Mono, Monaco`
}

This will set the font to Ubuntu Mono or Monaco. You can also add the name of other fonts, and then go-fonts will Find and use these fonts.

2. Using Freetype library

Freetype is a cross-platform open source font library that can be used in Windows, Linux and MacOS environments. To use Freetype in Golang, we first need to install the Freetype library. Use the following command to install it under Ubuntu:

sudo apt-get install libfreetype6 libfreetype6-dev

After that, we need to install Freetype’s Golang binding library. Use the following command to install:

go get -u github.com/golang/freetype

Code example:

//引入必要的包
import (
    "image"
    "image/color"
    "image/draw"
    "github.com/golang/freetype"
    "golang.org/x/image/font/gofont/goregular"
)

// 生成文字图像
func getTextImage(text string) (img *image.RGBA) {

    fontContext := freetype.NewContext()

    // 设置字体库为goregular
    fontContext.SetFont(goregular.TTF)
    fontContext.SetFontSize(18)

    imgSize := image.Point{X: 200, Y: 60}

    img = image.NewRGBA(image.Rectangle{Max: imgSize})

    draw.Draw(img, img.Bounds(), &image.Uniform{color.White}, image.Point{}, draw.Src)

    fontContext.SetDst(img)
    fontContext.SetClip(img.Bounds())
    fontContext.SetSrc(image.Black)

    txt := []byte(text)

    fontContext.DrawString(string(txt), freetype.Pt(5, 30))

    return
}

Use the Freetype library to generate text images. This technology can be used to generate some cool font images, such as generating logos, etc.

Summary

The above are two methods for setting fonts in Golang. You can choose the corresponding method according to your needs. Using the go-fonts package can easily use existing fonts, while using the Freetype library can more flexibly control font styles and generate text images and other operations.

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