20 Jan
2004
20 Jan
'04
11:57 a.m.
[...]
And it has to be the same pixel format if it's the same (wide) buffer.
:-)
I know SGI hardware supports multiple pixel formats in one framebuffer,
but I'm not sure it is possible to render to more than visual at a time; I
doubt
it.
Right,
but resolution is just a matter of RAMDAC parameters. All
I want is a 3856x1536 framebuffer with one RAMDAC displaying a
2048x1536 window and the other displaying a 1808x1356 window. I
don't care about one tiny MB of VRAM being invisible.
True, this should be possible as long as the pixel format is the
same; I misunderstood before, this is indeed a driver limitation. BTW, the 8800 is limited to 2048x2048 for OpenGL
contexts, but
that seems to be per context, and I'm not inderested in
stretching a single context over both screens anyway. (I'm not
interested in stretching *anything* over both screens; just
moving windows across them, which is not possible with
independent desktops.)
That is a problem since there is no way an application can know
about this limitation and I don't think X has a way of returning
"window too large" on a window config request.