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Setting this bit (at the batch level, not the draw level!) switches to [-1, 1] clipping instead of Metal's preferred [0, 1] clipping. Using this bit allows us to drop the clip_halfz lowering we had before, saving 2 instructions in every vertex shader. Fixes dEQP-GLES2.functional.depth_range.* Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io> Part-of: <mesa/mesa!17948>
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