How to draw string in one line with different colors

[RINNE-TAN]

I try to use the function DrawString draw it one by one and change the color ,
but it hard to know how much advanceWidth I should move,so I can't set the right pt .
Can you give me some help?

[andresperezl]

Everytime that you use DrawString it returns a fixed.Point26_6 which has the coordinates where the next character should go, I recently did this:

for i, l := range lines {
	for j, char := range l {
		c.SetSrc(image.NewUniform(hsl.HSL{H: 360.0 * float64(j) / float64(len(l)), S: 1.0, L: 0.6}))
		if j == 0 {
			pt = freetype.Pt((j+1)*fontSizePx, (i+1)*fontSizePx)
		}
		pt, err = c.DrawString(string(char), pt)
		if err != nil {
			panic(err)
		}
	}
}

Which will produce something like this: