├── README.md
├── ttfs
    ├── HanyiJianhei.ttf
    ├── LantingXihei.ttf
    └── LantingJianhei.ttf
└── gen.go


/README.md:
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1 | # gofont
2 | 
3 | generates ttfs fonts to go code


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/ttfs/HanyiJianhei.ttf:
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https://raw.githubusercontent.com/go-baa/gofont/master/ttfs/HanyiJianhei.ttf


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/ttfs/LantingXihei.ttf:
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https://raw.githubusercontent.com/go-baa/gofont/master/ttfs/LantingXihei.ttf


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/ttfs/LantingJianhei.ttf:
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https://raw.githubusercontent.com/go-baa/gofont/master/ttfs/LantingJianhei.ttf


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/gen.go:
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  1 | // Copyright 2016 The Go Authors. All rights reserved.
  2 | // Use of this source code is governed by a BSD-style
  3 | // license that can be found in the LICENSE file.
  4 | 
  5 | // +build ignore
  6 | 
  7 | package main
  8 | 
  9 | // This program generates the subdirectories of Go packages that contain []byte
 10 | // versions of the TrueType font files under ./ttfs.
 11 | //
 12 | // Currently, "go run gen.go" needs to be run manually. This isn't done by the
 13 | // usual "go generate" mechanism as there isn't any other Go code in this
 14 | // directory (excluding sub-directories) to attach a "go:generate" line to.
 15 | //
 16 | // In any case, code generation should only need to happen when the underlying
 17 | // TTF files change, which isn't expected to happen frequently.
 18 | 
 19 | import (
 20 | 	"bytes"
 21 | 	"fmt"
 22 | 	"go/format"
 23 | 	"io/ioutil"
 24 | 	"log"
 25 | 	"os"
 26 | 	"path/filepath"
 27 | 	"strings"
 28 | )
 29 | 
 30 | const suffix = ".ttf"
 31 | 
 32 | func main() {
 33 | 	ttfs, err := os.Open("ttfs")
 34 | 	if err != nil {
 35 | 		log.Fatal(err)
 36 | 	}
 37 | 	defer ttfs.Close()
 38 | 
 39 | 	infos, err := ttfs.Readdir(-1)
 40 | 	if err != nil {
 41 | 		log.Fatal(err)
 42 | 	}
 43 | 	for _, info := range infos {
 44 | 		ttfName := info.Name()
 45 | 		if !strings.HasSuffix(ttfName, suffix) {
 46 | 			continue
 47 | 		}
 48 | 		do(ttfName)
 49 | 	}
 50 | }
 51 | 
 52 | func do(ttfName string) {
 53 | 	fontName := fontName(ttfName)
 54 | 	pkgName := pkgName(ttfName)
 55 | 	if err := os.Mkdir(pkgName, 0777); err != nil && !os.IsExist(err) {
 56 | 		log.Fatal(err)
 57 | 	}
 58 | 	src, err := ioutil.ReadFile(filepath.Join("ttfs", ttfName))
 59 | 	if err != nil {
 60 | 		log.Fatal(err)
 61 | 	}
 62 | 
 63 | 	desc := "a proportional-width, sans-serif"
 64 | 	if strings.Contains(ttfName, "Mono") {
 65 | 		desc = "a fixed-width, slab-serif"
 66 | 	}
 67 | 
 68 | 	b := new(bytes.Buffer)
 69 | 	fmt.Fprintf(b, "// generated by go run gen.go; DO NOT EDIT\n\n")
 70 | 	fmt.Fprintf(b, "// Package %s provides the %q TrueType font\n", pkgName, fontName)
 71 | 	fmt.Fprintf(b, "// from the Go font family. It is %s font.\n", desc)
 72 | 	fmt.Fprintf(b, "//\n")
 73 | 	fmt.Fprintf(b, "// See https://blog.golang.org/go-fonts for details.\n")
 74 | 	fmt.Fprintf(b, "package %s\n\n", pkgName)
 75 | 	fmt.Fprintf(b, "// TTF is the data for the %q TrueType font.\n", fontName)
 76 | 	fmt.Fprintf(b, "var TTF = []byte{")
 77 | 	for i, x := range src {
 78 | 		if i&15 == 0 {
 79 | 			b.WriteByte('\n')
 80 | 		}
 81 | 		fmt.Fprintf(b, "%#02x,", x)
 82 | 	}
 83 | 	fmt.Fprintf(b, "\n}\n")
 84 | 
 85 | 	dst, err := format.Source(b.Bytes())
 86 | 	if err != nil {
 87 | 		log.Fatal(err)
 88 | 	}
 89 | 	if err := ioutil.WriteFile(filepath.Join(pkgName, "data.go"), dst, 0666); err != nil {
 90 | 		log.Fatal(err)
 91 | 	}
 92 | }
 93 | 
 94 | // fontName maps "Go-Regular.ttf" to "Go Regular".
 95 | func fontName(ttfName string) string {
 96 | 	s := ttfName[:len(ttfName)-len(suffix)]
 97 | 	s = strings.Replace(s, "-", " ", -1)
 98 | 	return s
 99 | }
100 | 
101 | // pkgName maps "Go-Regular.ttf" to "goregular".
102 | func pkgName(ttfName string) string {
103 | 	s := ttfName[:len(ttfName)-len(suffix)]
104 | 	s = strings.Replace(s, "-", "", -1)
105 | 	s = strings.ToLower(s)
106 | 	return s
107 | }


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