func Resize(fpath, tpath string, typ, cols, rows int) error {
var mw *C.MagickWand = C.NewMagickWand()
var cfpath = C.CString(fpath)
var ctpath = C.CString(tpath)
var etype C.ExceptionType
defer func() {
C.free(unsafe.Pointer(cfpath))
C.free(unsafe.Pointer(ctpath))
}()
defer func() {
C.ClearMagickWand(mw)
C.DestroyMagickWand(mw)
}()
if C.MagickReadImage(mw, cfpath) == C.MagickFalse {
goto ERR
}
if C.scale(mw, C.int(typ), C.int(cols), C.int(rows)) == C.MagickFalse {
goto ERR
}
if C.MagickWriteImages(mw, ctpath, C.MagickTrue) == C.MagickFalse {
goto ERR
}
return nil
ERR:
etype = C.MagickGetExceptionType(mw)
return errors.New(C.GoString(C.MagickGetException(mw, &etype)))
}
func deviceScale() float64 {
return float64(C.scale())
}