[ltp] Horizontal interrupt

[Henrique de Moraes Holschuh]

On Sun, 23 Sep 2007, Daniel wrote:
> On Sat, Sep 22, 2007 at 02:49:00PM -0400, bhaskins@chartermi.net wrote:
> > Plenty enough time for this application.
> > I am trying to interface a expensive fish finder/depth finder to any 
> > one of my many Thinkpads.
> > I have the A/D interface hooked up to my printer port and that part is
> > working fine except that the display is somewhat ragged because the
> > transmit control is not in sync with the display.
> 
> Ok, I see what you are trying to do, but I cannot see the benefit of it.
> Why don't you just build an image from the data you get on your parallel
> port and display it once it is complete? Or if that would take too long,
> why not display a partial image every time you have built a new row of
> your image, with the not-yet-transmitted lines displayed in
> black/white/whatever?

Indeed. Draw it in a OpenGL texture and tell OpenGL to blit it in sync with
the display refresh, for example.

-- 
  "One disk to rule them all, One disk to find them. One disk to bring
  them all and in the darkness grind them. In the Land of Redmond
  where the shadows lie." -- The Silicon Valley Tarot
  Henrique Holschuh