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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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Now, the driver's Viewport routine should call _mesa_ResizeBuffersMESA()
if necessary.
Cleaned up code related to GLframebuffer width/height initialization.
Set initial viewport/scissor params in _mesa_make_current2(), instead of
in the drivers' MakeCurrent functions.
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function is used.
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GL_COPY to turn off logicop. Fixes glean's logicop test.
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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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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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dd_function_table:BlendFuncSeparate. If a driver does not actually
support EXT_blend_func_separate, it can assume that the RGB and alpha
blend functions are the same.
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(build tested, but not physically tested)
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