// void cairo_get_dash (cairo_t *cr, double *dashes, double *offset);
func (self *Surface) GetDash() ([]float64, float64) {
var offset float64
length := int(C.cairo_get_dash_count(self.context))
if length == 0 {
return nil, 0
}
dashes := make([]float64, length)
C.cairo_get_dash(self.context, (*C.double)(unsafe.Pointer(&dashes[0])), (*C.double)(unsafe.Pointer(&offset)))
return dashes, offset
}
// GetDash is a wrapper around cairo_get_dash().
func (v *Context) GetDash() (dashes []float64, offset float64) {
dashCount := v.GetDashCount()
cdashes := (*C.double)(C.calloc(8, C.size_t(dashCount)))
var coffset C.double
C.cairo_get_dash(v.native(), cdashes, &coffset)
header := (*reflect.SliceHeader)((unsafe.Pointer(&dashes)))
header.Data = uintptr(unsafe.Pointer(cdashes))
header.Len = dashCount
header.Cap = dashCount
return dashes, float64(coffset)
}
//Dashes reports the current dash sequence.
//If dashing is not currently in effect the length of dashes
//is 0.
//
//Originally cairo_get_dash
func (c *Context) Dashes() (offset float64, dashes []float64) {
ln := c.DashCount()
if ln == 0 {
return
}
var off C.double
arr := make([]C.double, ln)
C.cairo_get_dash(c.c, &arr[0], &off)
offset = float64(off)
dashes = make([]float64, ln)
for i, v := range arr {
dashes[i] = float64(v)
}
return
}