[cairo] A hidden offset for the Xlib backend

[Owen Taylor]

On Mon, 2005-03-14 at 13:15 +0100, Jost Boekemeier wrote:

> I can get rid of the cairo_translate when replaying the retained path
> onto the surface:
> 
> /* compose context */
> void
> retained_compose_draw (cairo_shape_compose_context_t *_cx, 
> 		       cairo_shape_drawing_context_t *_cr,
> 		       cairo_shape_viewport_t *view,
> 		       cairo_surface_t *surface)
> 
> {
>   struct retained* cr = (struct retained*) _cr;
>   struct retained_compose* cx = (struct retained_compose*) _cx;
> 
>   cairo_save(cr->ct); 
>   cairo_set_target_surface(cr->ct, surface);
>   cairo_translate(cr->ct, -view->bounds.x, -view->bounds.y);
>   path_replay(view, cr);
>   cairo_restore(cr->ct);
>  }

I don't understand why there is an advantage to getting rid of
the cairo_translate() here.... presumably nothing in path_replay()
cares about device coordinates?

Regards,
					Owen

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