https://bugs.freedesktop.org/show_bug.cgi?id=35425
--- Comment #7 from Ian Romanick <i...@freedesktop.org> 2011-04-08 12:28:20 PDT
---
The GL_ARB_draw_instanced spec is really broken. In various ways, it does not
match what any vendor ships. The ARB is working on fixing the spec to match a
subset of reality that is useful to developers. Once consensus is reached,
there will almost certainly be changes required to Mesa.
Here's a table of the known problems:
AMD Mesa NVIDIA
-------------------------------------------+-----+------+-------
gl_InstanceIDARB must be available | yes | yes | NO
-------------------------------------------+-----+------+-------
gl_InstanceID must not be available | NO | yes | NO
-------------------------------------------+-----+------+-------
Neither can be available if OpenGL 3.0 nor | N/A | NO | N/A
GL_EXT_gpu_shader4 are not supported | | |
-------------------------------------------+-----+------+-------
I'll reopen this bug once the spec issues are resolved. My guess is that
gl_InstanceID will be added and the GL 3.0 / GL_EXT_gpu_shader4 dependency will
be dropped. It is also possible that, alas, gl_InstanceIDARB will be removed
too. We'll see what happens.
--
Configure bugmail: https://bugs.freedesktop.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug.
_______________________________________________
mesa-dev mailing list
mesa-dev@lists.freedesktop.org
http://lists.freedesktop.org/mailman/listinfo/mesa-dev
