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drirenderbuffers pointed at screen offset 0 and NULL. Instead, set up the front
buffer at startup but leave the others for later, since sis allocates them on
demand rather than using the static method of the other non-sis-descendent
drivers. Some basic apps work, but fallbacks may be broken still.
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Remove old (pre-renderbuffer) span code instead of converting that too. Remove this old code from mach64 (the dead code was not fully converted to spantmp2 previously) too.
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individual drivers and put them in common code. It is still possible for a driver to define its own macros if it has special needs. This affects CLIPPIXEL, CLIPSPAN, HW_CLIPLOOP, HW_ENDCLIPLOOP, and for drivers using the spantmp2 template also GET_SRC_PTR and GET_DST_PTR.
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Main driver impacts:
- new code for creating the Mesa GLframebuffer
- new span/pixel read/write code
Some drivers not yet updated/tested.
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values.
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* Don't dispatch vertices directly to MMIO; queue them up in dma-like buffers
first. This makes things more uniform between AGP and MMIO paths, cleans up
some locking ugliness, and makes the driver look more like other drivers.
* Don't use the AGP Cmd buffer provided by the server. Instead allocate one in
the client, which avoids the need for lots of synchronization stuff.
* Mark some MMIO accesses volatile that should have been.
* Disable the AGP submission path by default (agp_disable=true) due to
unresolved issues in the new code. The old code had its own (serious) errors
with AGP, so this is not really a step backwards.
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argument of a message to print. Make some assert(0)s use sis_fatal_error.
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Only available with Xlib driver for now.
Assorted clean-ups related to Draw/ReadBuffer().
Renamed FRONT_LEFT_BIT -> DD_FRONT_LEFT_BIT, etc.
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(build tested, but not physically tested)
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