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mesa: document _mesa_extension_override_* variables 

Currently there are no users of these outside of extensions.c.
Provide some information why they exist and how to use them.

Cc: Jordan Justen <jordan.l.justen@intel.com>
Signed-off-by: Emil Velikov <emil.velikov@collabora.com>
Reviewed-by: Andres Gomez <agomez@igalia.com>
This commit is contained in:
Emil Velikov 2017-11-16 14:22:18 +00:00 committed by Emil Velikov
parent d7ba4f41f9
commit e964e01fdd
1 changed files with 9 additions and 0 deletions
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9
src/mesa/main/extensions.h
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@ -106,6 +106,15 @@ _mesa_has_##name_str(const struct gl_context *ctx) \
#include "extensions_table.h"
#undef EXT
/* Sometimes the driver wants to query the extension override status before
* a context is created. These variables are filled with extension override
* information before context creation.
*
* This can be useful during extension bring-up when an extension is
* partially implemented, but cannot yet be advertised as supported.
*
* Use it with care and keep access read-only.
*/
extern struct gl_extensions _mesa_extension_override_enables;
extern struct gl_extensions _mesa_extension_override_disables;