Indigo2 Impact video

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Frederic Quinet (quinet++at++imtsg12.epfl.ch)
Fri, 20 Dec 1996 18:13:12 +0100

        Still using an Impact video board on indigo2 R10000 impact with
Performer 2.0 Irix 6.2. and Iris GL.
        As no one gave me answers to:

> -Is Performer 2.0 able to load video texture on my machine on Irix 6.2
> -If i have to do callbacks, do i have to use gl or pf functions ?
> -Do i have to worry about an offset (with Performer) to respect the
TRAM
>restrictions...?

        I kept on trying to run lv.c ( code,in the ML archive of june 1996,
wich
is based on a movietex.c ). This code is supposed to load a frame using
call backs and three functions:
                -glXCreateXGLXVideoSourceSGIX
                -glXMakeCurrentReadSGI
                -pfLoadTex

        To get at least one frame, i just had to fix gltexformat to
 PFTEX_RGBA_8 . Doing this it appeared that the frame came from the buffer
used by vidtotex.c . This would mean that pfLoadTex doesn't work and that there
is no equivalent in Performer of the function : glCopyTexSubImage2DEXT wich is
used to load frames in the TRAM.
        Does it mean there is no way to use Performer for video live texturing
on Indigo2 Impact with an Impact video board ?
        Would Performer 2.2 make any change?

        Thanks in advance.
                                Fred. quinet++at++imtsg12.epfl.ch

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