85 lines
1.8 KiB
Go
85 lines
1.8 KiB
Go
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// Copyright 2015 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// +build ignore
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//
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// This build tag means that "go install golang.org/x/exp/shiny/..." doesn't
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// install this example program. Use "go run main.go" to run it.
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// Font is a basic example of using fonts.
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package main
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import (
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"flag"
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"image"
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"image/color"
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"image/draw"
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"image/png"
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"io/ioutil"
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"log"
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"os"
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"golang.org/x/exp/shiny/font"
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"golang.org/x/exp/shiny/font/plan9font"
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"golang.org/x/image/math/fixed"
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)
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var (
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subfont = flag.String("subfont", "", `filename of the Plan 9 subfont file, such as "lucsans/lsr.14"`)
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firstRune = flag.Int("firstrune", 0, "the Unicode code point of the first rune in the subfont file")
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)
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func pt(p fixed.Point26_6) image.Point {
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return image.Point{
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X: int(p.X+32) >> 6,
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Y: int(p.Y+32) >> 6,
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}
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}
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func main() {
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flag.Parse()
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// TODO: mmap the file.
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if *subfont == "" {
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flag.Usage()
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log.Fatal("no subfont specified")
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}
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fontData, err := ioutil.ReadFile(*subfont)
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if err != nil {
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log.Fatal(err)
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}
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face, err := plan9font.ParseSubfont(fontData, rune(*firstRune))
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if err != nil {
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log.Fatal(err)
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}
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dst := image.NewRGBA(image.Rect(0, 0, 800, 100))
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draw.Draw(dst, dst.Bounds(), image.Black, image.Point{}, draw.Src)
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d := &font.Drawer{
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Dst: dst,
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Src: image.White,
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Face: face,
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Dot: fixed.Point26_6{
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X: 20 << 6,
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Y: 80 << 6,
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},
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}
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dot0 := pt(d.Dot)
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d.DrawString("The quick brown fox jumps over the lazy dog.")
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dot1 := pt(d.Dot)
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dst.SetRGBA(dot0.X, dot0.Y, color.RGBA{0xff, 0x00, 0x00, 0xff})
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dst.SetRGBA(dot1.X, dot1.Y, color.RGBA{0x00, 0x00, 0xff, 0xff})
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out, err := os.Create("out.png")
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if err != nil {
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log.Fatal(err)
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}
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defer out.Close()
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if err := png.Encode(out, dst); err != nil {
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log.Fatal(err)
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}
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}
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