func drawString(src image.Image, fontContext *freetype.Context, position raster.Point, text string) {
	fontContext.SetSrc(src)
	_, err := fontContext.DrawString(text, position)
	if err != nil {
		log.Println(err)
	}
}
Esempio n. 2
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func drawBorderedText(c *freetype.Context, text string, x, y int) {
	// God-awful hack to add a 2px black border around the text.
	c.SetSrc(image.Black)
	c.DrawString(text, freetype.Pt(x-2, y-2))
	c.DrawString(text, freetype.Pt(x, y-2))
	c.DrawString(text, freetype.Pt(x+2, y-2))
	c.DrawString(text, freetype.Pt(x-2, y))
	c.DrawString(text, freetype.Pt(x+2, y))
	c.DrawString(text, freetype.Pt(x-2, y+2))
	c.DrawString(text, freetype.Pt(x, y+2))
	c.DrawString(text, freetype.Pt(x+2, y+2))

	c.SetSrc(image.White)
	c.DrawString(text, freetype.Pt(x, y))
}
Esempio n. 3
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func renderString(s string, c *freetype.Context) (*image.RGBA, int) {
	estWidth := 8 * len(s)
	dst := image.NewRGBA(image.Rect(0, 0, estWidth, h))

	c.SetDst(dst)
	c.SetClip(dst.Bounds())

	c.SetSrc(&image.Uniform{C: shadow})
	pt := freetype.Pt(0, 13)
	c.DrawString(s, pt)

	c.SetSrc(image.White)

	pt = freetype.Pt(0, 12)
	pt, _ = c.DrawString(s, pt)

	return dst, getTextOffset(pt)
}
Esempio n. 4
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func drawText(font *truetype.Font, c *freetype.Context, color color.Color, rgba *image.RGBA, text string) (int, int) {
	fg := image.NewUniform(color)
	bg := image.Transparent
	draw.Draw(rgba, rgba.Bounds(), bg, image.ZP, draw.Src)
	c.SetFont(font)
	c.SetDst(rgba)
	c.SetSrc(fg)
	c.SetClip(rgba.Bounds())
	// height is the fraction of the font that is above the line, 1.0 would mean
	// that the font never falls below the line
	// TODO: wtf - this is all wrong!
	// fix fonts - we can't change the font size easily
	height := 1.3
	pt := freetype.Pt(0, int(float64(c.PointToFix32(*size)>>8)*height))
	adv, _ := c.DrawString(text, pt)
	pt.X += adv.X
	py := int(float64(pt.Y>>8)/height + 0.01)
	return int(pt.X >> 8), py
}