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

[Jesse Chappell]

On 11/22/06, Fons Adriaensen <fons.adriaensen at skynet.be> 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