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u_prim_restart: add inline function for getting restart index based on index size

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handy to have this available for drivers to reuse

Reviewed-by: Erik Faye-Lund <erik.faye-lund@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6147>
This commit is contained in:
Mike Blumenkrantz 2020-07-31 11:08:04 -04:00 • committed by Marge Bot
parent 1f24c54458
commit 070fd2b66f
1 changed files with 12 additions and 0 deletions
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12
src/gallium/auxiliary/util/u_prim_restart.h
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@ -51,6 +51,18 @@ enum pipe_error
util_draw_vbo_without_prim_restart(struct pipe_context *context,
const struct pipe_draw_info *info);
static inline unsigned
util_prim_restart_index_from_size(unsigned index_size)
{
if (index_size == 1)
return 0xff;
if (index_size == 2)
return 0xffff;
if (index_size == 4)
return 0xffffffff;
unreachable("unknown index size passed");
return 0;
}
#ifdef __cplusplus
}