/
main.go
90 lines (78 loc) · 1.89 KB
/
main.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
// Copyright (C) 2017 Google Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package main
import (
"flag"
"fmt"
"image/png"
"os"
)
var (
pngPath = flag.String("png", "glyphs.png", "The source glyph png")
)
type glyph struct {
rune rune
data []byte
}
func run() error {
flag.Parse()
file, err := os.Open(*pngPath)
if err != nil {
return err
}
defer file.Close()
img, err := png.Decode(file)
if err != nil {
return err
}
glyphCountX := 16
glyphCountY := 6
glyphW := img.Bounds().Dx() / glyphCountX
glyphH := img.Bounds().Dy() / glyphCountY
glyphs := []glyph{}
for r := ' '; r < '~'; r++ {
g := glyph{rune: r, data: make([]byte, 0, glyphW*glyphH)}
baseX := glyphW * (len(glyphs) % glyphCountX)
baseY := glyphH * (len(glyphs) / glyphCountX)
for y := 0; y < glyphH; y++ {
for x := 0; x < glyphW; x++ {
_, _, _, a := img.At(baseX+x, baseY+y).RGBA()
g.data = append(g.data, byte(a>>8))
}
}
glyphs = append(glyphs, g)
}
fmt.Print("var glyphs = map[rune][]byte {\n")
for _, g := range glyphs {
fmt.Printf(" '%c': []byte {\n", g.rune)
i := 0
for y := 0; y < glyphH; y++ {
fmt.Printf(" ")
for x := 0; x < glyphW; x++ {
fmt.Printf("0x%.2x, ", g.data[i])
i++
}
fmt.Printf("\n")
}
fmt.Printf(" },\n")
}
fmt.Printf("}\n")
return nil
}
func main() {
if err := run(); err != nil {
fmt.Fprintf(os.Stderr, err.Error())
os.Exit(1)
}
}