Esempio n. 1
1
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.PointToFixed(*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
}
Esempio n. 2
0
// DrawWidth simulates drawing s using Context c and returns the raster.Point
// where X is the width of the drawn string. The context's src and dst are
// unused, but the font should already be set. Clip is set to an empty Rectangle
// and should be reset afterwards.
func DrawWidth(c *freetype.Context, s string) (fixed.Point26_6, error) {
	// nil rectangle is always empty so draw is never called
	c.SetClip(image.Rectangle{})
	p, err := c.DrawString(s, fixed.Point26_6{}) // 0,0
	return p, err
}