feat(hdr): HDR image support, HDR10 metadata, and regression test harness#314

Merged

vanceingalls merged 15 commits intofeat/hdr-layered-compositingfrom

feat/hdr-image-support

Apr 20, 2026

Commits on Apr 20, 2026

feat(hdr): add HDR image support — probe, extract, and composite

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fix(hdr): address review feedback across stack

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fix: restore .gitignore entries removed during rebase

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fix(producer): add HDR image decode cache + promote blit failure to warn
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test(engine): expand parseImageElements coverage
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fix(engine): handle stdin EINVAL on streaming encoder pipe close

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test(producer): add hdr-smoke regression script + blitHdrVideoLayer logger test
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fix(engine): convert sRGB DOM overlays to BT.2020 primaries before HDR composite
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feat(hdr): inject mdcv/clli MP4 container boxes for HDR10 outputs
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fix(engine): install __name shim before page scripts run
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test(producer): add hdr-feature-stack regression fixture
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test(producer): add opacity-mixed-fade HDR regression fixture
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test(producer): refresh hdr-feature-stack with real HDR/SDR clips
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fix(producer): align hdr layer start times reference to renamed variable
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docs(hdr): document HDR regression fixtures and testing gaps
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