The one major capture-API difference left vs Apollo: punktfunk used legacy
IDXGIOutput1::DuplicateOutput; Apollo uses IDXGIOutput5::DuplicateOutput1 with a
format list, the modern path that's more robust to overlay/format changes (a
candidate for the SudoVDA-on-hybrid 0x887A0026 churn). Add a duplicate_output()
helper used at all 3 duplication sites (open, reopen_duplication, try_reduplicate):
QI to IDXGIOutput5 and DuplicateOutput1, falling back to legacy DuplicateOutput.
DuplicateOutput1 requires per-monitor-v2 DPI awareness, so set that at process
start alongside the GPU-pref hook (matches Apollo).
Format list is BGRA8-only for now (SDR test): DuplicateOutput1 returns the first
format it can CONVERT to, so FP16-first would hand back FP16 even on SDR and trip
the HDR path. Real FP16/HDR capture (with IDXGIOutput6 colorspace detection) is the
follow-up once the churn is settled.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
enricobuehler
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