[Mesa-dev] [PATCHES] multi-api support in st/dri

[nobled]

The first patch fixes a current bug, the second naively integrates
support for ES 1 and ES 2 into Gallium DRI drivers:
1. st/dri: Make clear which API's are supported (aka just desktop GL)
2. st/dri: Add multi-api support (applies after the first patch)

One issue with patch 2, though, is implementing dri_get_current() --
it calls a vfunc on a struct st_api object, but the st_api object is
API-specific, and the dri_get_current function is called on a dri
screen--which could support multiple API's. So for now it has to guess
which API's implementation of get_current to use -- currently, all
three use the same implementation, so this isn't a real problem yet.
Should get_current() be moved out of struct st_api though?
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