accumulation buffer support
sroland at tungstengraphics.com
Mon Jul 28 16:38:41 PDT 2008
On 29.07.2008 00:15, Svilen wrote:
> I was wondering whether your driver supports accumulation buffers and if
> yes how to enable them.
> Here is my platform:
> X1600 Mobility Radeon
> Linux, Fedora 9
> Xorg 7.4 (unofficial)
> Mesa 7.1 (unofficial)
> Section "Device"
> Identifier "Videocard0"
> Driver "radeon"
> A try to get a glx visual with accumulation buffers fails. On Fedora 8
> with ATI driver it works.
> Below is the parameter list for glXChooseVisual
> GLX_RGBA ,
> GLX_RED_SIZE , 8,
> GLX_GREEN_SIZE , 8,
> GLX_BLUE_SIZE , 8,
> GLX_ACCUM_RED_SIZE , 8,
> GLX_ACCUM_GREEN_SIZE , 8,
> GLX_ACCUM_BLUE_SIZE , 8,
> GLX_DOUBLEBUFFER ,
> I'll really appreciate your help
Not sure I think it should work (except I think the last strong should
be "None", not "GLX_NONE"), since all implementations are required to
support configurations with a accumulation buffer. Note that they are
all marked slow however since all open source drivers implement this as
a software fallback only, so it will likely be useless (except for
educational purposes). (Generally, I don't think there's any hardware
out there which really has anything resembling even remotely close to a
special accumulation buffer except maybe some old professional opengl
graphic accelerators - somewhat modern hardware is likely to implement
this with other means, so it's just a render buffer like any other
render buffer would be with EXT_fbo, the special accum functions are
just done by the driver).
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