On 06/22/2012 03:39 PM, Brian Paul wrote:
The GLSL linker code in assign_varying_locations() counts up the number
of varying variables and checks the count against the
ctx->Const.MaxVarying limit.
I know we've had problems with this in the past but I think there's
another issue.
In the case of fragment shaders we're also counting variables like
gl_FrontFacing and gl_FragCoord against the limit. IMO, we shouldn't
count those vars there since they're not really interpolated values like
colors or texcoords or generic varyings.
Sadly, they are on some hardware. This is one of the cases where we had
talked about either having some flags to control which things the linker
counts or giving the driver the ability to over-ride the count generated
by the linker.
Comments?
-Brian
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