Re: [Flightgear-devel] Scene upscaling (Was:cReplace OSG camera resize function by own implementation)

[Fernando G. L. <fer...@gm...>]

This is possible to do right now with no core changes, but I decided
to keep the Classic pipeline as it is for backwards compatibility
reasons. Unless we find some other way of doing it (like with the
method that Fahim posted), rendering to a lower resolution buffer and
upscaling it requires a FBO. However, the entire point of the Classic
pipeline was to remain fully compatible with how we did things
pre-Compositor, so I decided to keep things as they were and just
render the near and far cameras directly to the screen.

Here is a quick compositor pipeline that should do what you want:
https://pastebin.com/GwwfmD4h

The pipeline goes into $FG_ROOT/Compositor/Classic/classic-upscaling.xml
You can enable it by starting FG with
--compositor=Compositor/Classic/classic-upscaling

The scaling factor can be changed through
/sim/rendering/scaling-factor. Setting it to 0.5 for example will make
FG render at half the window resolution. Hope this helps.

Fernando