[Mesa-dev] [PATCH] Add support for NV_depth_buffer_float v2.

[Mathias Fröhlich]

Hi,

On Monday, September 08, 2014 21:14:12 Marek Olšák wrote:
> Do we have a piglit to confirm unclamped Z values really work with
> current hardware drivers?
I have just sent out an updated patch set as well as a piglit test.

The first attempt was obviously too short fetched as the vital internal format
datatypes do not even alias with the current close relatives as I thought in
the first place.

I gave the cik type radeon an other try this morning and run the oss
driver with the two tests. Unfortunately it did not succeed like
the gallium software renderers just did. But replacing the R_0282D0_PA_SC_VPORT_ZMIN_0
with 0xBF800000 (== fui(-1)) made the provided piglit test pass.
Just replacing the value in this hard way is probably an unappropriate change,
but to share what I already saw.

Thanks

Mathias