[cairo] Text Grid Performance

[Antoine Azar]

>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.

Hey Gerdus,
are you using the Makefile.win32 files? if so, they don't have 
different build configurations, but you can tweak the parameter 
switches given to the compiler. You'll have to rebuild everything 
everytime you switch from one config to the other though.
I modified those makefiles to properly support debug and release, but 
I still need to land that patch. It should arrive shortly, otherwise 
I can send you my makefiles by email.

Antoine


>~Gerdus
>
>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?
> >
> > ~G
> >
> >
> > 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
> > > >
> > > >
> > >
> >
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