llvmpipe: blit cts fails
With #6659 (closed) on the way to being resolved, these are the only GLES CTS failures remaining:
dEQP-GLES3.functional.fbo.blit.rect.nearest_consistency_mag,Fail
dEQP-GLES3.functional.fbo.blit.rect.nearest_consistency_mag_reverse_dst_x,Fail
dEQP-GLES3.functional.fbo.blit.rect.nearest_consistency_mag_reverse_src_dst_x,Fail
dEQP-GLES3.functional.fbo.blit.rect.nearest_consistency_mag_reverse_src_dst_y,Fail
dEQP-GLES3.functional.fbo.blit.rect.nearest_consistency_mag_reverse_src_x,Fail
dEQP-GLES3.functional.fbo.blit.rect.nearest_consistency_min,Fail
dEQP-GLES3.functional.fbo.blit.rect.nearest_consistency_min_reverse_dst_x,Fail
dEQP-GLES3.functional.fbo.blit.rect.nearest_consistency_min_reverse_src_dst_x,Fail
dEQP-GLES3.functional.fbo.blit.rect.nearest_consistency_min_reverse_src_dst_y,Fail
dEQP-GLES3.functional.fbo.blit.rect.nearest_consistency_min_reverse_src_x,Fail
I haven't dug in much, but the name does imply there's something wrong with nearest filtering in blits.