func main() {
flag.Parse()
fmt.Printf("Loading fontfile %q\n", *fontfile)
b, err := ioutil.ReadFile(*fontfile)
if err != nil {
log.Println(err)
return
}
f, err := truetype.Parse(b)
if err != nil {
log.Println(err)
return
}
fupe := fixed.Int26_6(f.FUnitsPerEm())
printBounds(f.Bounds(fupe))
fmt.Printf("FUnitsPerEm:%d\n\n", fupe)
c0, c1 := 'A', 'V'
i0 := f.Index(c0)
hm := f.HMetric(fupe, i0)
g := &truetype.GlyphBuf{}
err = g.Load(f, fupe, i0, font.HintingNone)
if err != nil {
log.Println(err)
return
}
fmt.Printf("'%c' glyph\n", c0)
fmt.Printf("AdvanceWidth:%d LeftSideBearing:%d\n", hm.AdvanceWidth, hm.LeftSideBearing)
printGlyph(g)
i1 := f.Index(c1)
fmt.Printf("\n'%c', '%c' Kern:%d\n", c0, c1, f.Kern(fupe, i0, i1))
}
func LoadFont(fontData []byte) (*truetype.Font, error) {
f, err := truetype.Parse(fontData)
if err != nil {
log.Printf("Error Parsing font file: %v\n", err)
return nil, err
}
return f, nil
}
// ParseFont just calls the Parse function from the freetype/truetype package.
// It is provided here so that code that imports this package doesn't need
// to also include the freetype/truetype package.
func ParseFont(b []byte) (*truetype.Font, error) {
return truetype.Parse(b)
}
func main() {
flag.Parse()
// Read the font data.
fontBytes, err := ioutil.ReadFile(*fontfile)
if err != nil {
log.Println(err)
return
}
f, err := truetype.Parse(fontBytes)
if err != nil {
log.Println(err)
return
}
// Draw the background and the guidelines.
fg, bg := image.Black, image.White
ruler := color.RGBA{0xdd, 0xdd, 0xdd, 0xff}
if *wonb {
fg, bg = image.White, image.Black
ruler = color.RGBA{0x22, 0x22, 0x22, 0xff}
}
const imgW, imgH = 640, 480
rgba := image.NewRGBA(image.Rect(0, 0, imgW, imgH))
draw.Draw(rgba, rgba.Bounds(), bg, image.ZP, draw.Src)
for i := 0; i < 200; i++ {
rgba.Set(10, 10+i, ruler)
rgba.Set(10+i, 10, ruler)
}
// Draw the text.
h := font.HintingNone
switch *hinting {
case "full":
h = font.HintingFull
}
d := &font.Drawer{
Dst: rgba,
Src: fg,
Face: truetype.NewFace(f, &truetype.Options{
Size: *size,
DPI: *dpi,
Hinting: h,
}),
}
y := 10 + int(math.Ceil(*size**dpi/72))
dy := int(math.Ceil(*size * *spacing * *dpi / 72))
d.Dot = fixed.Point26_6{
X: (fixed.I(imgW) - d.MeasureString(title)) / 2,
Y: fixed.I(y),
}
d.DrawString(title)
y += dy
for _, s := range text {
d.Dot = fixed.P(10, y)
d.DrawString(s)
y += dy
}
// Save that RGBA image to disk.
outFile, err := os.Create("out.png")
if err != nil {
log.Println(err)
os.Exit(1)
}
defer outFile.Close()
b := bufio.NewWriter(outFile)
err = png.Encode(b, rgba)
if err != nil {
log.Println(err)
os.Exit(1)
}
err = b.Flush()
if err != nil {
log.Println(err)
os.Exit(1)
}
fmt.Println("Wrote out.png OK.")
}