i915g: fix glClearColor using a 1 byte color format
Unscissored glClearColor is using i915_fill_blit().
Clearing can be done with the 1 byte formats
GL_ALPHA, GL_LUMINANCE or GL_INTENSITY.
Routine i915_fill_blit() is called with a rgba-mask containing
1 byte, but it is handling this as a 2-byte color.
This fix adds the needed 1 byte setup to both
i915_fill_blit() and i915_copy_blit().
It solves 1 piglit-test concerning arb_clear_texture-base-formats
and 15 tests concerning fbo-clear-formats.
No regression is shown at other piglit-tests.
Cc: mesa-stable
Signed-off-by: GKraats <vd.kraats@hccnet.nl>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/32178>
2 files changed
