improve blitter-box clamping
As pointed out in kusma/mesa!332 (merged), we could get negative x/y here as well that might need some clamping.
But even better would be to do this clamping in the state-tracker.
As pointed out in kusma/mesa!332 (merged), we could get negative x/y here as well that might need some clamping.
But even better would be to do this clamping in the state-tracker.