[PATCH 04/16] glamor: Replace fallback preparation code

[Keith Packard]

Eric Anholt <eric at anholt.net> writes:

> GLES2 only allows WRITE_ONLY in the glMapBuffer interface (and only when
> GL_OES_mapbuffer is available), which the old path avoided.  I think
> your change just totally breaks fallbacks in gles2.

So, in GLES2 mode, we just need to malloc memory and download to
that. That's an easy change to make.

> I noticed this when going to delete the code you made dead by this
> patch.

GLES is crippled beyond belief. Here's a different version of the
prepare patch which doesn't use PBOs.

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-- 
keith.packard at intel.com
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