// The easiest (?) way to handle vertical text placement is
// not to use gravity at all because then you know that all the text is
// placed relative to ImageMagick's (0,0) coordinate which is the top left of
// the screen and the baseline will be y=0.
func draw_metrics(mw *imagick.MagickWand, dw *imagick.DrawingWand, dx *float64, dy, sx float64, text string) {
mw.AnnotateImage(dw, *dx, dy, 0, text)
mw.DrawImage(dw)
// get the font metrics
fm := mw.QueryFontMetrics(dw, text)
if fm != nil {
// Adjust the new x coordinate
*dx += fm.TextWidth + sx
}
}
func drawMetrics(mw *imagick.MagickWand, dw *imagick.DrawingWand, dx *float64, text string) {
rotation := float64(random(-30, 30))
mw.AnnotateImage(dw, *dx, 35, rotation, text)
mw.DrawImage(dw)
// get the font metrics
fm := mw.QueryFontMetrics(dw, text)
if fm != nil {
// Adjust the new x coordinate
*dx += fm.TextWidth + 2
}
}