eae4c6df8d
when mirroring the texture corrdinates the indices must be mirrored as well and the half pixel shift must be applied in reverse. Fixes a number of tests from: dEQP-GLES31.functional.texture.gather.offset.* dEQP-GLES31.functional.texture.gather.offsets.* Signed-off-by: Gert Wollny <gert.wollny@collabora.com> Reviewed-by: Roland Scheidegger <sroland@vmware.com>