[cairo] perf: long dashed lines

[Behdad Esfahbod]

On Sun, 2008-02-03 at 00:01 -0500, Vladimir Vukicevic wrote:
> 
> Here's a followup patch that attempts to implement the bigger  
> optimization -- entirely avoid creating faces for out-of-bounds  
> segments.  This is still a work in progress, but figured I would toss  
> it out for feedback.  Seems to work quite well, though I'm not sure if  
> my quick fix of expanding the bounding box by the line width is enough  
> to catch all edge issues.  (Also, I just realized that I'm not sure if  
> that's the right line width -- do I need to transform it?)


Generally looks good.

Line width is in user-space.  Though we've wanted to change that to be
locked at set_line_width() time.

As for the assumption, at least for miter joins it should be
(miter_limit * line_width).

I also want to see check_segment to something better.  Like,
may_intersect for example.  Or would that be may_not_intersect?

The intersect and point_in_box functions need to move somewhere else
where they belong, and renamed to _cairo_box_*().


>      - Vlad

Cheers,
-- 
behdad
http://behdad.org/

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