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Diffstat (limited to 'vendor/golang.org/x/image/font/basicfont/gen.go')
-rw-r--r--vendor/golang.org/x/image/font/basicfont/gen.go115
1 files changed, 115 insertions, 0 deletions
diff --git a/vendor/golang.org/x/image/font/basicfont/gen.go b/vendor/golang.org/x/image/font/basicfont/gen.go
new file mode 100644
index 0000000..67a21a7
--- /dev/null
+++ b/vendor/golang.org/x/image/font/basicfont/gen.go
@@ -0,0 +1,115 @@
+// 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"
+
+`