anv: Implement VK_EXT_transform_feedback on Gen7
Things work a little different on Gen7 than they do on Gen8+. In
particular, SOBufferEnable lives in 3DSTATE_STREAMOUT but BufferPitch
lives in 3DSTATE_SO_BUFFER. This leaves us having to marshal data
around a bit more than we did on Gen8. Still, it's not too bad.
Normally, I don't spend much time on Gen7 but XFB just became a hard
requirement for DXVK so it stopped working for all our Haswell users.
Let's get them happily playing their games again. 😸
Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/3532
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6997>
5 files changed
