[cairo] Rectangle Border Widths
Chris Wilson
chris at chris-wilson.co.uk
Tue Apr 10 11:46:54 PDT 2012
On Tue, 10 Apr 2012 14:29:33 -0400 (EDT), robertk54 at aol.com wrote:
>
>
> >> Is it possible to render rectangles whose vertical lines are different in
> width from the horizontal lines?
>
> >cairo_rectangle(cr, x, y, width, height);
> >cairo_save(cr);
> >cairo_scale(cr, stroke_width, stroke_height);
> >cairo_set_line_width(cr, 1);
> >cairo_stroke(cr);
> >cairo_restore(cr);
>
>
> Thanks Chris!
> Given this solution, what are the resulting dimensions of the rectangles? Both the rectangle outside the line and the one within the line? I need to fill the inner rectangle with a color . I also need to use the inner rectangle for clipping other content which will be rendered on top of it.
>
It should draw an outline between the two rectangles:
(x - stroke_width/2, y - stroke_height/2)
(x + stroke_width/2, y - stroke_height/2)
(x + stroke_width/2, y + stroke_height/2)
(x - stroke_width/2, y + stroke_height/2)
and
(x + stroke_width/2, y + stroke_height/2)
(x - stroke_width/2, y + stroke_height/2)
(x - stroke_width/2, y - stroke_height/2)
(x + stroke_width/2, y - stroke_height/2)
If you need to reuse only part of the stroked path, I'd recommend you
construct the outlines by hand (for the exercise ;).
-Chris
--
Chris Wilson, Intel Open Source Technology Centre
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