func (te *TextElement) getContext() *freetype.Context {
c := freetype.NewContext()
c.SetDPI(75)
c.SetFont(te.props.textFont)
c.SetFontSize(float64(te.props.textSize))
c.SetSrc(image.NewUniform(te.props.textColor))
c.SetHinting(font.HintingNone)
return c
}
func main() {
flag.Parse()
// Read the font data.
fontBytes, err := ioutil.ReadFile(*fontfile)
if err != nil {
log.Println(err)
return
}
f, err := freetype.ParseFont(fontBytes)
if err != nil {
log.Println(err)
return
}
// Initialize the context.
fg, bg := image.Black, image.White
if *wonb {
fg, bg = image.White, image.Black
}
c := freetype.NewContext()
c.SetDPI(*dpi)
c.SetFont(f)
c.SetFontSize(*size)
c.SetSrc(fg)
switch *hinting {
default:
c.SetHinting(font.HintingNone)
case "full":
c.SetHinting(font.HintingFull)
}
var width fixed.Int26_6
var height fixed.Int26_6
for _, s := range text {
dimensions, _ := c.StringDimensions(s)
height = height + dimensions.Y
if dimensions.X > width {
width = dimensions.X
}
}
imgWidth := int(width >> 6)
imgHeight := int(height >> 6)
fmt.Println(imgWidth, imgHeight)
rgba := image.NewRGBA(image.Rect(0, 0, imgWidth, imgHeight))
draw.Draw(rgba, rgba.Bounds(), bg, image.ZP, draw.Src)
c.SetClip(rgba.Bounds())
c.SetDst(rgba)
// Draw the text.
pt := freetype.Pt(0, int(c.PointToFixed(*size)>>6))
for _, s := range text {
_, err = c.DrawString(s, pt)
if err != nil {
log.Println(err)
return
}
pt.Y += c.PointToFixed(*size * *spacing)
}
// 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.")
}
