[cairo] Text Grid Performance
Gerdus van Zyl
gerdusvanzyl at gmail.com
Wed Feb 6 08:41:32 PST 2008
Would results from cairo-perf be useful? If so in what way should i
invoke it? raw or default?
I finally got a cairo build env working today - mingw/msys. :-) Is it
documented anywhere how to compiler optimize and minimize the DLL
built? How does one invoke a release or debug build? Sorry I am a
total C build system newbie.
On Feb 6, 2008 5:37 PM, Gerdus van Zyl <gerdusvanzyl at gmail.com> wrote:
> Alternatively I need to only draw that part of the screen that can be
> done within the timeframe as in partial rendering. Does anyone have a
> design pattern for that?
> On Feb 5, 2008 8:42 PM, Gerdus van Zyl <gerdusvanzyl at gmail.com> wrote:
> > Ok, thanks for the feedback. Firstly I am on windows (windowsXP),
> > 2.4ghz amd, ati radeon 9500. I am using the win32 backend.
> > In the text-scroll.py program Owen attached I get: 100 frames in
> > 7480.99994659 ms, 13.3671969942 FPS, which is fairly consistent with
> > my previous results considering event handling/reflow overhead.
> > The clip is a rectangle and so far I know device-pixel aligned (I
> > don't use scale and all x,y,width,height is int). Tested
> > identity_matrix but made no difference.
> > Top functions by cumulative time is:
> > ncalls tottime percall cumtime percall filename:lineno(function)
> > 67 1.280 0.019 20.128 0.300 platformwin32c.py:384(OnPaint)
> > 67 0.399 0.006 18.848 0.281 uxpwindowapp.py:1219(event_paint)
> > 6466/66 2.674 0.000 16.366 0.248 uxpwindowapp.py:1038(_renderone)
> > 6334 6.415 0.001 10.892 0.002 uxbase.py:1079(showText)
> > 6334 0.717 0.000 13.226 0.002 uxlabel.py:15(renderctx)
> > The rendering flow in my program is OnPaint -> event_paint ->
> > _renderone(x250) -> renderctx -> showText. Which to my eye looks like
> > cairo being the bottleneck.
> > Thanks.
> > ~Gerdus
> > On Feb 5, 2008 7:49 PM, Vladimir Vukicevic <vladimir at pobox.com> wrote:
> > >
> > > On Feb 5, 2008, at 7:10 AM, Gerdus van Zyl wrote:
> > > >
> > > > My text rendering for each element is basically: save,clip,render text
> > > > using pango,restore
> > >
> > > Just off the top of my head -- is the clip a rectangle, and if so, is
> > > it device-pixel aligned? If not, that could account for the
> > > performance that you're seeing.
> > >
> > > - Vlad
> > >
> > >
More information about the cairo