I am curious about whether the hi-z trick would work well on software or if it's performance relies on dedicated hardware. What else would you take from GL? Not triangles for sure.
Oh yeah, they would need depth info. Well, we could have a 16-bit integer depth buffer I suppose.
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Or just 8 bits and put everything that overflows on the blend pass.
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Yeah, that’d work too. In that case, 4k res would be 240x136 tiles, or 32kB. For rectangular areas you’d have 15 XMM registers per scanline, which should all fit without spilling…
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