http://bugs.winehq.org/show_bug.cgi?id=29144
--- Comment #26 from Martín Perazzo rechapita@hotmail.com 2012-01-16 11:05:16 CST --- (In reply to comment #16)
I have occasional contact with AMD and was about to file a bug in their official Bugzilla. I didn't hit the submit button when I realized that their only options are violating the GL_NV_half_float spec(which would be hacky) or writing a new extension(which I consider an overkill for the legacy immediate mode functions).
I'd say GL_ARB_instanced_arrays is the best way to go if we want to avoid the extra type conversion.
I would like a little bit of info on this. Seems converting to normal floats and using glVertexAttrib4fARB is increasing the bandwith traffic to the graphic card far too much causing a huge performance hit relative to nvidia cards.
dumb question: why GL_ARB_half_float_vertex is not usable in this case?