[Mesa-dev] [RFC][PATCH] Add usage for resources that have a short lifes cycle

[Jakob Bornecrantz]

Hi all

Short and simple patch series attached.

Some drivers can treat one shot resources differently then resources
that are expected to be used several times. Add a usage flag to allow
the state tracker to mark such resources.

The motivation behind this is to identify the glBitmap cache textures
so that the i915g driver can make them not tiled and upload the texture
data with pwrites, which is faster then mapping them via the GTT which is
needed when they tiled.

Comments please?

Cheers Jakob.
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