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Aiden
2026-05-08 18:07:45 +10:00
parent eede6938cb
commit f322abf79a
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SHADER_CONTRACT.md
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@@ -102,6 +102,8 @@ Optional fields:
- `fonts`: packaged font assets for live text parameters.
- `temporal`: history-buffer requirements.
Parameter objects may also include an optional `description` string. The control UI displays it as helper text underneath the parameter label, so use it for short operational guidance rather than long documentation.
Shader-visible identifiers must be valid Slang-style identifiers:
- `entryPoint`
@@ -237,7 +239,7 @@ Fields:
Color/precision notes:
- `context.sourceColor`, `sampleVideo()`, and temporal history samples are display-referred Rec.709-like RGB, not linear-light RGB.
- The current DeckLink backend prefers 10-bit YUV capture and output when the card/mode supports it, with automatic 8-bit fallback.
- The current DeckLink backend prefers 10-bit YUV capture and output when the card/mode supports it, with automatic 8-bit fallback. If external keying is enabled, output prefers 10-bit YUVA (`Ay10`) when supported so shader alpha can drive the key signal, then falls back to 8-bit BGRA.
- Internal decoded, layer, composite, output, and temporal render targets are 16-bit floating point, so gradients and LUT work have more headroom than packed byte video I/O formats.
- Do not add extra Rec.709 or linear conversions unless the shader intentionally documents that behavior.