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[idd] hdr: dont advertise non hdr formats as hdr

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This commit is contained in:
Geoffrey McRae
2026-07-16 05:26:06 +10:00
parent b241f76908
commit 2adca4bc48
1 changed files with 14 additions and 6 deletions
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18
idd/LGIdd/CSwapChainProcessor.cpp
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@@ -366,11 +366,16 @@ bool CSwapChainProcessor::SwapChainNewFrame(ComPtr<IDXGIResource> acquiredBuffer
srcFormat.height = srcDesc.Height;
srcFormat.format = GetFrameType(srcDesc.Format);
// Determine HDR status from both format and color space.
// HDR metadata loading is handled inside each branch so the logic
// is self-contained: first identify the content type, then load the
// matching metadata.
if (srcDesc.Format == DXGI_FORMAT_R16G16B16A16_FLOAT)
// Only HDR-capable formats can carry HDR content.
// 8-bit formats (BGRA, RGBA) cannot represent HDR,
// even if IsHDRActive() is momentarily stale during mode switches.
if (srcDesc.Format != DXGI_FORMAT_R16G16B16A16_FLOAT &&
srcDesc.Format != DXGI_FORMAT_R10G10B10A2_UNORM)
{
srcFormat.hdr = false;
srcFormat.hdrPQ = false;
}
else if (srcDesc.Format == DXGI_FORMAT_R16G16B16A16_FLOAT)
{
// FP16 is HDR content (scRGB / linear, not PQ-curve).
// FP16 always carries HDR color data regardless of OS HDR mode,
@@ -408,7 +413,10 @@ bool CSwapChainProcessor::SwapChainNewFrame(ComPtr<IDXGIResource> acquiredBuffer
// Load HDR metadata; if none is available the frame is not HDR.
if (!m_devContext->GetHDRMetadata(srcFormat))
{
srcFormat.hdr = false;
srcFormat.hdrPQ = false;
}
}
bool postProcessFormatChanged = false;