On 29/11/14 06:07, Roland Scheidegger wrote:
Am 29.11.2014 um 06:12 schrieb Ilia Mirkin:
Hello,
It appears that the A3XX ISA (freedreno) requires the texture
instruction to properly specify its output type (or at least f32 vs
u32). Now I could stick this into a driver-local shader key, but it
seems unfortunate since in glsl, it knows whether it's an int or float
sampler.
Would there be any objections to being able to specify an int property
on the SAMP declaration? Or some alternate approach?
Hmm I guess the return type of the sampler_view decl was intended for
something along these lines (it's a d3d10-ism but not really used right
now, and it is per channel too).
Right --
http://msdn.microsoft.com/en-us/library/windows/desktop/bb943976.aspx
If you make some return type in sampler
this is thus not very nice as now you've got it both in sampler and
sampler_view. Not sure what a good solution of that would be...
I think a good compromise would be to force separate declarations of
sampler_view and sampler, like we need to do for D3D10 sample opcodes
DCL SVIEW[0], 2D, UINT
DCL SAMP[0]
TEX OUT[1], IN[1], SAMP[0]
at least for the UINT resources.
I also think that eventually we should have TGSI to drop the opcodes
that take combined sampler and sampler_views, have only the D3D10 like
opcodes with seperate operands for sampler and sampler_view, and have a
PIPE_CAP_SEPARATE just for those drivers that can handle the
combination. But this can wait.
Jose
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