Re: [linux-audio-user] [ANN] jack_oscrolloscope 0.1

From: Jesse Chappell <jesse@email-addr-hidden>
Date: Wed Nov 22 2006 - 18:32:44 EET

On 11/22/06, Fons Adriaensen <fons.adriaensen@email-addr-hidden> wrote:
> On Wed, Nov 22, 2006 at 10:36:02AM -0500, Jesse Chappell wrote:
>
> > ... The downside is that it is difficult to overlay drawing into
> > this area that you don't want scrolled, which might be why
> > freewheeling doesn't use the technique (I'm just guessing).
>
> They trick here is to use a pixmap as window background for
> the scrolling content (which is what Yass does anyway, as
> otherwise you must be prepared to update any part at any time),
> and draw the non-moving part over it directly to the screen.
> The latter must then be redrawn on demand of course.

Oops, you're right, I even do this in FreqTweak :)

jlc
Received on Wed Nov 22 20:15:05 2006

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