2 Jan
2010
2 Jan
'10
10:38 a.m.
On Thu, Dec 31, 2009 at 12:39:06AM +1100, Patrick Shirkey wrote:
On 12/30/2009 11:57 PM, Paul Davis wrote:
> ardour's Gtkmm2ext::FastMeter optimizes even more. we compute the
> difference between the last drawn instance of the meter and the new
> appearance and only draw that the delta. this means that we often get
> away with drawing just a single row of pixels.
>
>
http://subversion.ardour.org/svn/ardour2/branches/2.0-ongoing/libs/gtkmm2ex…
>
> see the vertical_expose() and horizontal_expose() methods. Note that
> we are also using precomputed pixbufs and just blitting them.
>
Same for jkmeter and the meters used in AmbDec and TetraProc.
I am taking a slightly different approach to the
visual aspect as I have
added a glassy bubble overlay and the notches sit on top of the overlay.
The meters are redrawing under the overlay to give the effect of being
inside a glassy tube.
So while manufacturers of real HW meters try to do their best to
avoid reflections, you are adding them ? :-)
So basically I have to redraw the whole thing each
time unless I change
the code to use the above method.
No, unless the 'glass' is blurring the picture, all you need is still
two precomputed images.
Ciao,
--
FA
Wie der Mond heute Nacht aussieht !
Ist es nicht ein seltsames Bild ?