diff options
author | Chad Versace <[email protected]> | 2011-09-28 17:06:35 -0700 |
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committer | Chad Versace <[email protected]> | 2011-10-18 11:42:53 -0700 |
commit | fd7c46f53f3a7ae5c67f3c44ba283eeb4f72b366 (patch) | |
tree | 66d5389cde9c5bd181489afde376aee453c07747 /src/mesa/vbo/vbo_exec_array.c | |
parent | 4b6311978f6710cfb2e9d77a2ca7a30f709c1f37 (diff) |
mesa: Add dd_function_table::PrepareExecBegin
This hook allows the driver to prepare for a glBegin/glEnd.
i965 will use the hook to avoid avoid recursive calls to FLUSH_VERTICES
during a buffer resolve meta-op.
Detailed Justification
----------------------
When vertices are queued during a glBegin/glEnd block, those vertices must
of course be drawn before any rendering state changes. To enusure this,
Mesa calls FLUSH_VERTICES as a prehook to such state changes. Therefore,
FLUSH_VERTICES itself cannot change rendering state without falling into
a recursive trap.
This precludes meta-ops, namely i965 buffer resolves, from occuring while
any vertices are queued. To avoid that situation, i965 must satisfy the
following condition: that it queues no vertex if a buffer needs resolving.
To satisfy this, i965 will use the PrepareExecBegin hook to resolve all
buffers on entering a glBegin/glEnd block.
--------
v2: Don't add dd_function_table::CleanupExecEnd. Anholt and I discovered
that hook to be unnecessary.
Reviewed-by: Brian Paul <[email protected]>
Signed-off-by: Chad Versace <[email protected]>
Diffstat (limited to 'src/mesa/vbo/vbo_exec_array.c')
0 files changed, 0 insertions, 0 deletions