[cairo] Chaco DisplayPDF with Antigrain Internals

David Reveman c99drn at cs.umu.se
Wed Aug 18 06:53:04 PDT 2004

On Tue, 2004-08-17 at 11:00 -0400, Carl Worth wrote:
> On Mon, 16 Aug 2004 16:26:59 -0700, "M. Evans" wrote:
> > My impression is the Cairo suits static display pages, not anything 
> > interactive or animated.
> We certainly intend it to be usable for interactive and animated 2D
> graphics. We're not done yet, but some people are having fun with it
> already.
> > Some have questioned the need for pixel-level accuracy, e.g.
> Cairo does not guarantee a pixel-level accurate API.
> For example, take a look at the differences in the following
> screenshots:
> 	http://www.cs.umu.se/~c99drn/pics/
> These were rendered with cairo, but some with the glitz backend and some
> with cairo's software backend (pixman). The results are similar in all
> cases, but obviously not pixel-accurate. And those slightly less-precise
> results from glitz come at speeds that are up to hundreds of times
> faster.
> David and Peter's presented a paper at the USENIX Annual Technical
> conference this year that details the speedups possible with glitz.
> I hope one of them will reply here with a pointer to a full-text version
> of that paper.

You can get a PDF version of the paper from here:

I'll add html and ps versions of the paper to the glitz.freedesktop.org
page later.

The paper is actually a bit out of date, we wrote that paper about 4-5
months ago and much have happen to glitz since then. The performance
numbers should be pretty much the same, though.

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