// 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" "golang.org/x/image/font" "golang.org/x/image/font/plan9font" "golang.org/x/image/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" `