Exemplo n.º 1
0
func (m *CImage) drawString(text string) *CImage {

	fg, bg := image.Black, &image.Uniform{color.RGBA{255, 255, 255, 255}}
	draw.Draw(m, m.Bounds(), bg, image.ZP, draw.Src)
	c := freetype.NewContext()
	c.SetFontSize(m.config.FontSize)
	c.SetClip(m.Bounds())
	c.SetDst(m)
	c.SetSrc(fg)
	i := 0
	for _, s := range text {
		c.SetFont(m.config.fontManager.GetRandomFont())
		charX := (int(c.PointToFix32(m.config.FontSize) >> 8)) * i
		charY := int(c.PointToFix32(m.config.FontSize) >> 8)
		charPt := freetype.Pt(charX, charY)
		c.DrawString(string(s), charPt)
		i = i + 1
	}

	return m
}
Exemplo n.º 2
0
func main() {
	flag.Parse()

	// Read the font data.
	fontBytes, err := ioutil.ReadFile(*fontfile)
	if err != nil {
		log.Println(err)
		return
	}
	font, err := freetype.ParseFont(fontBytes)
	if err != nil {
		log.Println(err)
		return
	}

	// Initialize the context.
	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}
	}
	rgba := image.NewRGBA(image.Rect(0, 0, 640, 480))
	draw.Draw(rgba, rgba.Bounds(), bg, image.ZP, draw.Src)
	c := freetype.NewContext()
	c.SetDPI(*dpi)
	c.SetFont(font)
	c.SetFontSize(*size)
	c.SetClip(rgba.Bounds())
	c.SetDst(rgba)
	c.SetSrc(fg)
	switch *hinting {
	default:
		c.SetHinting(freetype.NoHinting)
	case "full":
		c.SetHinting(freetype.FullHinting)
	}

	// Draw the guidelines.
	for i := 0; i < 200; i++ {
		rgba.Set(10, 10+i, ruler)
		rgba.Set(10+i, 10, ruler)
	}

	// Draw the text.
	pt := freetype.Pt(10, 10+int(c.PointToFix32(*size)>>8))
	for _, s := range text {
		_, err = c.DrawString(s, pt)
		if err != nil {
			log.Println(err)
			return
		}
		pt.Y += c.PointToFix32(*size * *spacing)
	}

	// Save that RGBA image to disk.
	f, err := os.Create("out.png")
	if err != nil {
		log.Println(err)
		os.Exit(1)
	}
	defer f.Close()
	b := bufio.NewWriter(f)
	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.")
}