// CreateForRectangle is a wrapper around cairo_surface_create_for_rectangle().
func (v *Surface) CreateForRectangle(x, y, width, height float64) *Surface {
c := C.cairo_surface_create_for_rectangle(v.native(), C.double(x),
C.double(y), C.double(width), C.double(height))
s := wrapSurface(c)
runtime.SetFinalizer(s, (*Surface).destroy)
return s
}
func (self *Surface) CreateForRectangle(x, y, width, height float64) *Surface {
return &Surface{
context: self.context,
surface: C.cairo_surface_create_for_rectangle(self.surface,
C.double(x), C.double(y), C.double(width), C.double(height)),
}
}
//CreateSubsurface creates a window into e defined by r.
//All operations performed on s are clipped and translated to e.
//No operation on s performed outside the bounds of r are performed on e.
//
//This is useful for passing constrained child surfaces to routines that draw
//directly on the parent surface with no further allocations, double buffering,
//or copies.
//
//Warning
//
//The semantics of subsurfaces have not yet been finalized in libcairo, unless
//r is: in full device units, is contained within the extents of the target
//surface, and the target or subsurface's device transforms are not changed.
//
//Originally cairo_surface_create_for_rectangle.
func (e *XtensionSurface) CreateSubsurface(r Rectangle) (s Subsurface, err error) {
r = r.Canon()
x0, y0 := r.Min.c()
x1 := C.double(r.Dx())
y1 := C.double(r.Dy())
ss := C.cairo_surface_create_for_rectangle(e.s, x0, y0, x1, y1)
o := Subsurface{NewXtensionPagedVectorSurface(ss)}
return o, o.Err()
}
