[PATCH] enhanced core vblank support

[Jesse B. <jes...@in...>]

Per the discussion in the other vblank thread, this patch does several
things:
  - adds a new getMSC hook to __DRIdrawableRec
  - updates glXGetVideoSyncSGI to use the new hook if present
  - adds new vblank fields to __DRIdrawablePrivateRec
  - adds a new driDrawableGetMSC32 vblank.c routine
    this new function takes a drawable private so it can set pipe
    flags for example when it calls into the DRM
  - adds a wrapper for the new vblank.c routine in dri_util.c
    for symmetry
  - updates driCreateNewDrawable to init the new vblank fields
    and set the callback for the new per-drawable getMSC routine
  - adds a __DriverAPI hook for GetDrawableMSC
  - updates the drivers to use driDrawableGetMSC32 in their
    DriverAPI initialization

I'm not sure about the compatibility implications of these changes, it
seems like touching __DRIdrawableRec and __DriverAPIRec may affect
binary compatibility with existing drivers, is there anything else?

If compatibility isn't a concern, I can go ahead and remove the
per-screen getMSC altogether, along with its associated __DriverAPI
function pointers and remove some code.

Also, I decided against cleaning up the screen and drawable callback
wrappers in dri_util.c.  It seems they'll be needed if we ever add full
OML extension support.  I made the new stuff fit in with that scheme.

Any thoughts?

Thanks,
Jesse

 include/GL/internal/dri_interface.h            |   11 ++++++
 src/glx/x11/glxcmds.c                          |   34 +++++++++++++++-----
 src/mesa/drivers/dri/common/dri_util.c         |   12 +++++++
 src/mesa/drivers/dri/common/dri_util.h         |   17 ++++++++++
 src/mesa/drivers/dri/common/vblank.c           |   39 +++++++++++++++++++++--
 src/mesa/drivers/dri/common/vblank.h           |    3 +
 src/mesa/drivers/dri/ffb/ffb_xmesa.c           |    1
 src/mesa/drivers/dri/i810/i810screen.c         |    1
 src/mesa/drivers/dri/i915/intel_screen.c       |    1
 src/mesa/drivers/dri/i915tex/intel_screen.c    |    1
 src/mesa/drivers/dri/i965/intel_blit.c         |    3 +
 src/mesa/drivers/dri/i965/intel_buffers.c      |   41 +++++++++++++++++++++++++
 src/mesa/drivers/dri/i965/intel_context.c      |   14 ++++----
 src/mesa/drivers/dri/i965/intel_context.h      |    7 ----
 src/mesa/drivers/dri/i965/intel_screen.c       |    1
 src/mesa/drivers/dri/i965/server/i830_common.h |    9 +++++
 src/mesa/drivers/dri/mach64/mach64_screen.c    |    1
 src/mesa/drivers/dri/mga/mga_xmesa.c           |    1
 src/mesa/drivers/dri/nouveau/nouveau_screen.c  |    2 -
 src/mesa/drivers/dri/r128/r128_screen.c        |    1
 src/mesa/drivers/dri/radeon/radeon_screen.c    |    2 +
 src/mesa/drivers/dri/sis/sis_screen.c          |    1
 src/mesa/drivers/dri/tdfx/tdfx_screen.c        |    1
 src/mesa/drivers/dri/unichrome/via_screen.c    |    1
 24 files changed, 180 insertions(+), 25 deletions(-)