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-rw-r--r--vendor/golang.org/x/image/example/font/main.go106
1 files changed, 106 insertions, 0 deletions
diff --git a/vendor/golang.org/x/image/example/font/main.go b/vendor/golang.org/x/image/example/font/main.go
new file mode 100644
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--- /dev/null
+++ b/vendor/golang.org/x/image/example/font/main.go
@@ -0,0 +1,106 @@
+// 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 example
+//
+// This build tag means that "go install golang.org/x/image/..." doesn't
+// install this example program. Use "go run main.go" to run it or "go install
+// -tags=example" to install it.
+
+// Font is a basic example of using fonts.
+package main
+
+import (
+ "flag"
+ "image"
+ "image/color"
+ "image/draw"
+ "image/png"
+ "io/ioutil"
+ "log"
+ "os"
+ "path/filepath"
+ "strings"
+
+ "golang.org/x/image/font"
+ "golang.org/x/image/font/plan9font"
+ "golang.org/x/image/math/fixed"
+)
+
+var (
+ fontFlag = flag.String("font", "",
+ `filename of the Plan 9 font or subfont file, such as "lucsans/unicode.8.font" or "lucsans/lsr.14"`)
+ firstRuneFlag = flag.Int("firstrune", 0, "the Unicode code point of the first rune in the subfont file")
+)
+
+func pt(p fixed.Point26_6) image.Point {
+ return image.Point{
+ X: int(p.X+32) >> 6,
+ Y: int(p.Y+32) >> 6,
+ }
+}
+
+func main() {
+ flag.Parse()
+
+ // TODO: mmap the files.
+ if *fontFlag == "" {
+ flag.Usage()
+ log.Fatal("no font specified")
+ }
+ var face font.Face
+ if strings.HasSuffix(*fontFlag, ".font") {
+ fontData, err := ioutil.ReadFile(*fontFlag)
+ if err != nil {
+ log.Fatal(err)
+ }
+ dir := filepath.Dir(*fontFlag)
+ face, err = plan9font.ParseFont(fontData, func(name string) ([]byte, error) {
+ return ioutil.ReadFile(filepath.Join(dir, filepath.FromSlash(name)))
+ })
+ if err != nil {
+ log.Fatal(err)
+ }
+ } else {
+ fontData, err := ioutil.ReadFile(*fontFlag)
+ if err != nil {
+ log.Fatal(err)
+ }
+ face, err = plan9font.ParseSubfont(fontData, rune(*firstRuneFlag))
+ if err != nil {
+ log.Fatal(err)
+ }
+ }
+
+ dst := image.NewRGBA(image.Rect(0, 0, 800, 300))
+ draw.Draw(dst, dst.Bounds(), image.Black, image.Point{}, draw.Src)
+
+ d := &font.Drawer{
+ Dst: dst,
+ Src: image.White,
+ Face: face,
+ }
+ ss := []string{
+ "The quick brown fox jumps over the lazy dog.",
+ "Hello, 世界.",
+ "U+FFFD is \ufffd.",
+ }
+ for i, s := range ss {
+ d.Dot = fixed.P(20, 100*i+80)
+ dot0 := pt(d.Dot)
+ d.DrawString(s)
+ dot1 := pt(d.Dot)
+ dst.SetRGBA(dot0.X, dot0.Y, color.RGBA{0xff, 0x00, 0x00, 0xff})
+ dst.SetRGBA(dot1.X, dot1.Y, color.RGBA{0x00, 0x00, 0xff, 0xff})
+ }
+
+ out, err := os.Create("out.png")
+ if err != nil {
+ log.Fatal(err)
+ }
+ defer out.Close()
+ if err := png.Encode(out, dst); err != nil {
+ log.Fatal(err)
+ }
+}