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[idd] hdr: complete HDR display and cursor metadata

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Publish BT.2020 chromaticities in the virtual monitor EDID so
Windows receives a valid HDR colour volume.

Extend cursor messages with their IddCx SDR white level and an
explicit visibility-valid flag. Consumers can then calibrate cursors
without treating colour-transform-only messages as cursor hides.
This commit is contained in:
Geoffrey McRae
2026-07-19 04:42:03 +10:00
parent e9d0c88764
commit 20225f05d1
7 changed files with 62 additions and 10 deletions
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6
idd/LGIdd/CSwapChainProcessor.cpp
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@@ -206,6 +206,7 @@ bool CSwapChainProcessor::SwapChainThreadCore()
surface = buffer.MetaData.pSurface;
colorSpace = buffer.MetaData.SurfaceColorSpace;
sdrWhiteLevel = buffer.MetaData.SdrWhiteLevel;
m_sdrWhiteLevel.store(sdrWhiteLevel, std::memory_order_relaxed);
UpdateHDRMetadata(buffer.MetaData);
}
}
@@ -776,6 +777,7 @@ bool CSwapChainProcessor::QueryHWCursor()
in.ShapeBufferSizeInBytes = 512 * 512 * 4;
IDARG_OUT_QUERY_HWCURSOR out = {};
UINT cursorWhiteLevel = m_sdrWhiteLevel.load(std::memory_order_relaxed);
NTSTATUS status;
#ifdef HAS_IDDCX_110
if (m_devContext->CanProcessFP16())
@@ -787,6 +789,8 @@ bool CSwapChainProcessor::QueryHWCursor()
out.Y = out3.Y;
out.IsCursorShapeUpdated = out3.IsCursorShapeUpdated;
out.CursorShapeInfo = out3.CursorShapeInfo;
if (out3.SdrWhiteLevel)
cursorWhiteLevel = out3.SdrWhiteLevel;
}
else
#endif
@@ -810,7 +814,7 @@ bool CSwapChainProcessor::QueryHWCursor()
if (out.IsCursorShapeUpdated)
m_lastShapeId = out.CursorShapeInfo.ShapeId;
m_devContext->SendCursor(out, m_shapeBuffer);
m_devContext->SendCursor(out, m_shapeBuffer, cursorWhiteLevel);
return true;
}