Francisco Jerez
57dee58c82
Currently the "Source0 Alpha Present to RenderTarget" bit of the RT write message header is derived from brw_wm_prog_data::replicate_alpha. However the src0_alpha payload is provided anytime it's specified to the logical message. This could theoretically lead to an inconsistency if somebody provided a src0_alpha value while brw_wm_prog_data::replicate_alpha was false, as I'm planning to do in a future commit in order to implement a hardware workaround. Instead calculate the header bit based on whether a src0_alpha value was provided to the logical message, which guarantees the same behavior on pre-ICL and ICL+ (the latter used an extended descriptor bit for this which didn't suffer from the same issue). Remove the brw_wm_prog_data::replicate_alpha flag. Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
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