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https://bugs.freedesktop.org/show_bug.cgi?id=6412
Summary: mach64 vertex buffer cleanup
Product: Mesa
Version: CVS
Platform: PC
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P2
Component: Drivers/DRI/Mach64
AssignedTo: dri-devel@lists.sourceforge.net
ReportedBy: [EMAIL PROTECTED]
mach64 is unique is having two implementations of VB, one that uses the
"template" vertex format and one that uses the "native" vertex format.
The "template" implementation uses the mesa provided t_dd_vb.c. However,
it still provides its own version of t_dd_vbtmp.h (mach64_vbtmp.h) and
adds complex draw functions in mach64_tris.c for conversion to native format.
The "native" implementation has simple draw functions. However, it performs
conversion to native format during emit (mach64_native_vbtmp.h) and back to
template format in translate (mach64_native_vb.c), these functions differ
greatly from the tnl_dd templates.
The attached patches have yet another implementation of the mach64 VB.
They define mach64Vertex as a struct that matches the native vertex format,
this allows to use both the mesa templates with very little changes and
the simple draw functions.
The quirks are:
* we still have to provide slightly modified versions of templates t_dd_vb.c
and t_dd_vbtmp.h, however the changes to t_dd_vb.c are minimal and can be
dropped with another iteration of cleanups if the patches are accepted.
* they drop MACH64_PREMULT_TEXCOORDS, it did not seem to make a difference
in performance.
* they push conversion to little-endian down to the draw functions, these
changes are untested as I have x86.
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