[Bug 11506] Poor performance in d3d_surface:fb_copy_to_texture_direct

http://bugs.winehq.org/show_bug.cgi?id=11506

--- Comment #1 from Roderick Colenbrander   2008-02-07 15:35:29 ---
First of all pixel format R32F is emulated using RGBA32F inside wined3d because
it isn't offered natively in OpenGL. This conversion is done in software and
also isn't that efficient. Further in absence of FBOs (make sure if you have
them to set the offscreen rendering method to it) this method is indeed slow
and there is nothing that can be done about it.