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Consolidate support for synchronizing to and retrieving vblank counters. Also
fix the core vblank code to return monotonic MSC counters, which are required
by some GLX extensions. Adding support for multiple pipes to a low level
driver is fairly easy, the Intel 965 driver provides simple example code (see
intel_buffers.c:intelWindowMoved()).
The new code bumps the media stream counter extension version to 2 and adds a
new getDrawableMSC callback. This callback takes a drawablePrivate pointer,
which is used to calculate the MSC value seen by clients based on the actual
vblank counter(s) returned from the kernel. The new drawable private fields
are as follows:
- vblSeq - used for tracking vblank counts for buffer swapping
- vblFlags - flags (e.g. current pipe), updated by low level driver
- msc_base - MSC counter from the last time the current pipe changed
- vblank_base - kernel DRM vblank counter from the last time the pipe changed
Using the above variables, the core vblank code (in vblank.c) can calculate a
monotonic MSC value. The low level DRI drivers are responsible for updating
the current pipe (by setting VBLANK_FLAG_SECONDARY for example in vblFlags)
along with msc_base and vblank_base whenever the pipe associated with a given
drawable changes (again, see intelWindowMoved for an example of this).
Drivers should fill in the GetDrawableMSC DriverAPIRec field to point to
driDrawableGetMSC32 and add code for pipe switching as outlined above to fully
support the new scheme.
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In the process, fix some alignment issues:
- Scratch space allocation was aligned into units of 1KB, while the allocation
wanted units of bytes, so we never allocated enough space for scratch.
- GRF register count was programmed as ALIGN(val - 1, 16) / 16 instead of
ALIGN(val, 16) / 16 - 1, which overcounted for val != 16n+1.
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This code existed to dump logs of hardware access to be replayed in simulation.
Since we have real hardware now, it's not really needed.
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internal function to match the EXT_shadow_funs
spec. fix bug#11925
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operations are based on read drawable. fix bug#10136.
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2. I notice multiple ARB_occlusion_query should be able to overlap according to spec.
3. Declaring extern variables in a .c file is evil, fix it.
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Signed-off-by: Keith Packard <keithp@neko.keithp.com>
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unification.
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Submitted by Gary Wong <gtw@gnu.org>
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like 'fire' that display a help message or fps number this way.
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we render. Currenly requires that some state be re-examined after
every LOCK_HARDWARE().
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as non-aliasing and cope with the >32 attributes that result, taking
materials into account.
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This driver comes from Tungsten Graphics, with a few further modifications by
Intel.
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