[cairo] GTK+, Cairo, XLib integration for fast 2D graphics drawing

[Chris Wilson]

On Mon, 19 Mar 2012 19:45:31 +0200, Christos Sotiriou <csotiriou at gmail.com> wrote:
> Hi again Chris,
> 
> I am attaching the cairo-trace file created on my Fedora 15 laptop

Thanks. So it appears the bulk of your rendering is in the form of lots
of tiny stroked rectangles, correct?

stroke: count 255357 [no-op 0], elapsed 1112598240 [97.4%]
  extents: total 5843148, avg 22.882 [unbounded 0]
  op: 255357 OVER
  source: 255357 solid
  path: 255351 rectliinear, 6 straight
  antialias: 255357 default
  caps: 255357 butt
  joins: 255357 miter
  clip: 255306 none, 51 region

The truly puzzling part for me is that they seem viable candidates to
hit the fast-paths, yet end up in the general polygon code.

<< /content //COLOR_ALPHA /width 500 /height 500 >> surface context
n 22.726562 22.726562 454.546875 454.546875 rectangle
0 0.65 1 rgb set-source
0.295602 0.913843 scale
3.655372 set-line-width
stroke+
pop

Oh, I see. A non-uniform, non-integer scale factor. That would explain
it. Let's see if I can cook up something faster for you.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre