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gallium: Add PIPE_BUFFER_USAGE_DISCARD.

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When passed to map() signals that the buffer's previous contents are
not required, allowing the driver to allocate a new buffer if the
current buffer can not be mapped immediately.
This commit is contained in:
Younes Manton 2009-01-14 00:21:24 -05:00
parent 11f91936f2
commit 0521c2682a
1 changed files with 1 additions and 0 deletions
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src/gallium/include/pipe/p_defines.h
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@ -204,6 +204,7 @@ enum pipe_texture_target {
#define PIPE_BUFFER_USAGE_VERTEX (1 << 5)
#define PIPE_BUFFER_USAGE_INDEX (1 << 6)
#define PIPE_BUFFER_USAGE_CONSTANT (1 << 7)
#define PIPE_BUFFER_USAGE_DISCARD (1 << 8)
/** Pipe driver custom usage flags should be greater or equal to this value */
#define PIPE_BUFFER_USAGE_CUSTOM (1 << 16)