[Mesa-dev] Mesa (primitive-restart): 682 new commits
keithw at vmware.com
Thu Aug 12 06:16:55 PDT 2010
On Thu, 2010-08-12 at 06:08 -0700, Brian Paul wrote:
> On 08/11/2010 09:40 PM, Luca Barbieri wrote:
> > [Apparently brianp at kemper.freedesktop.org is forwarded to
> > brian.paul at tungstengraphics.com, which is no longer valid.]
> > I'd suggest to put it in struct pipe_index_buffer.
> > The argument is that the index buffer needs to be prepared
> > specifically for the primitive restart enable setting:
> > 1. If the index buffer has no restart indices, using primitive restart
> > will have no effect
> > 2. If the index buffer has restart indices, not using primitive
> > restart will cause out-of-bounds accesses or weird rendering results
> > Also, the index size is there too, so there is no question of what
> > happens if the primitive restart index doesn't fit in the index size.
> > Currently the Mesa state tracker binds the index buffer for every draw
> > call, and thus would be unaffected (but it should stop doing that).
> The thing is, primitive restart also applies to non-indexed
> primitives. It would be a little weird to set index buffer state for
> glDrawArrays calls.
Wow, that's a pretty wierd case. So if you set the primitive restart
value to 32 then draw_arrays(TRISTRIP, 0, 64), you'll get two strips??
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