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)
}
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
}