116 lines
3.0 KiB
Go
116 lines
3.0 KiB
Go
// Copyright 2015 The Go Authors. All rights reserved.
|
||
// Use of this source code is governed by a BSD-style
|
||
// license that can be found in the LICENSE file.
|
||
|
||
// +build ignore
|
||
|
||
// This program generates data.go.
|
||
package main
|
||
|
||
import (
|
||
"bytes"
|
||
"fmt"
|
||
"go/format"
|
||
"image"
|
||
"image/draw"
|
||
"io/ioutil"
|
||
"log"
|
||
"path"
|
||
"path/filepath"
|
||
|
||
"git.gutmet.org/golang-image.git/font"
|
||
"git.gutmet.org/golang-image.git/font/plan9font"
|
||
"git.gutmet.org/golang-image.git/math/fixed"
|
||
)
|
||
|
||
func main() {
|
||
// nGlyphs is the number of glyphs to generate: 95 characters in the range
|
||
// [0x20, 0x7e], plus the replacement character.
|
||
const nGlyphs = 95 + 1
|
||
// The particular font (unicode.7x13.font) leaves the right-most column
|
||
// empty in its ASCII glyphs. We don't have to include that column in the
|
||
// generated glyphs, so we subtract one off the effective width.
|
||
const width, height, ascent = 7 - 1, 13, 11
|
||
|
||
readFile := func(name string) ([]byte, error) {
|
||
return ioutil.ReadFile(filepath.FromSlash(path.Join("../testdata/fixed", name)))
|
||
}
|
||
fontData, err := readFile("unicode.7x13.font")
|
||
if err != nil {
|
||
log.Fatalf("readFile: %v", err)
|
||
}
|
||
face, err := plan9font.ParseFont(fontData, readFile)
|
||
if err != nil {
|
||
log.Fatalf("plan9font.ParseFont: %v", err)
|
||
}
|
||
|
||
dst := image.NewRGBA(image.Rect(0, 0, width, nGlyphs*height))
|
||
draw.Draw(dst, dst.Bounds(), image.Black, image.Point{}, draw.Src)
|
||
d := &font.Drawer{
|
||
Dst: dst,
|
||
Src: image.White,
|
||
Face: face,
|
||
}
|
||
for i := 0; i < nGlyphs; i++ {
|
||
r := '\ufffd'
|
||
if i < nGlyphs-1 {
|
||
r = 0x20 + rune(i)
|
||
}
|
||
d.Dot = fixed.P(0, height*i+ascent)
|
||
d.DrawString(string(r))
|
||
}
|
||
|
||
w := bytes.NewBuffer(nil)
|
||
w.WriteString(preamble)
|
||
fmt.Fprintf(w, "// mask7x13 contains %d %d×%d glyphs in %d Pix bytes.\n", nGlyphs, width, height, nGlyphs*width*height)
|
||
fmt.Fprintf(w, "var mask7x13 = &image.Alpha{\n")
|
||
fmt.Fprintf(w, " Stride: %d,\n", width)
|
||
fmt.Fprintf(w, " Rect: image.Rectangle{Max: image.Point{%d, %d*%d}},\n", width, nGlyphs, height)
|
||
fmt.Fprintf(w, " Pix: []byte{\n")
|
||
b := dst.Bounds()
|
||
for y := b.Min.Y; y < b.Max.Y; y++ {
|
||
if y%height == 0 {
|
||
if y != 0 {
|
||
w.WriteByte('\n')
|
||
}
|
||
i := y / height
|
||
if i < nGlyphs-1 {
|
||
i += 0x20
|
||
fmt.Fprintf(w, "// %#2x %q\n", i, rune(i))
|
||
} else {
|
||
fmt.Fprintf(w, "// U+FFFD REPLACEMENT CHARACTER\n")
|
||
}
|
||
}
|
||
|
||
for x := b.Min.X; x < b.Max.X; x++ {
|
||
if dst.RGBAAt(x, y).R > 0 {
|
||
w.WriteString("0xff,")
|
||
} else {
|
||
w.WriteString("0x00,")
|
||
}
|
||
}
|
||
w.WriteByte('\n')
|
||
}
|
||
w.WriteString("},\n}\n")
|
||
|
||
fmted, err := format.Source(w.Bytes())
|
||
if err != nil {
|
||
log.Fatalf("format.Source: %v", err)
|
||
}
|
||
if err := ioutil.WriteFile("data.go", fmted, 0644); err != nil {
|
||
log.Fatalf("ioutil.WriteFile: %v", err)
|
||
}
|
||
}
|
||
|
||
const preamble = `// generated by go generate; DO NOT EDIT.
|
||
|
||
package basicfont
|
||
|
||
// This data is derived from files in the font/fixed directory of the Plan 9
|
||
// Port source code (https://github.com/9fans/plan9port) which were originally
|
||
// based on the public domain X11 misc-fixed font files.
|
||
|
||
import "image"
|
||
|
||
`
|