Angus Dorbie (dorbie++at++multipass.asd.sgi.com)
Sun, 13 Jul 1997 22:38:42 -0700
On iR you could resize half height channels then
ised the DVR capability to scale to video but on
RE2 this capability doesn't exist.
Cheers,Angus.
On Jul 13, 3:11pm, Jeremy Friesner wrote:
> Subject: Stupid Performer tricks
>
> Hi Performers,
>
> I've got a Performer app that outputs two 640x486
> pfChannels into the RE2 MCO frame buffer.
>
> The video outputs from these channels are then fed into
> a stereo multiplexer to form a single (frame-sequential)
> stereo image on a TV screen. As I understand it, the
> stereo multiplexer hardware more-or-less drops
> every second row of pixels from each pfChannel.
>
> With that in mind, I want to take some of the load off
> of my draw process by to generating a 640x243 image
> for each pfChannel, and then "zooming" the channel by
> a factor of two vertically, so that each row of pixels
> is duplicated on the next row, and the pfChannel
> still fills the 640x486 area on-screen that the RE2 MCO
> requires.
>
> So--does anyone know how to do this with OpenGL/Performer,
> in such a way that it wont take up more draw time then
> just rendering every line the regular way would?
> (hardware zoom, maybe??)
>
> Thanks in advance for any suggestions,
>
> Jeremy (who is cutting all corners in search of a better frame rate ;))
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>-- End of excerpt from Jeremy Friesner
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