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[idd] disable HDR and post-processing when in software mode

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This commit is contained in:
Geoffrey McRae
2026-07-19 05:51:59 +10:00
parent bea35a030b
commit 653cecadeb
12 changed files with 215 additions and 99 deletions
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43
idd/LGIdd/CEdid.cpp
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@@ -45,6 +45,7 @@ static const BYTE EDID_MANUFACTURE_YEAR_2026 = 36; // 1990 + 36 = 2026
static const BYTE EDID_VERSION = 1;
static const BYTE EDID_REVISION = 4;
static const BYTE EDID_VIDEO_INPUT_DIGITAL_8BPC_HDMI_A = 0xa2;
static const BYTE EDID_VIDEO_INPUT_DIGITAL_10BPC_HDMI_A = 0xb2;
static const BYTE EDID_HORIZONTAL_SIZE_CM = 52;
static const BYTE EDID_VERTICAL_SIZE_CM = 29;
@@ -316,17 +317,16 @@ static WORD EdidChromaticity(double value)
return (WORD)min(1023.0, max(0.0, value * 1024.0 + 0.5));
}
static void SetChromaticityCoordinates(BYTE coordinates[10])
static void SetChromaticityCoordinates(BYTE coordinates[10], bool hdr)
{
// The virtual display transports HDR in the BT.2020 container. Describe
// that full container gamut and its D65 white point rather than leaving an
// invalid all-zero base-block colour volume.
const WORD rx = EdidChromaticity(0.7080);
const WORD ry = EdidChromaticity(0.2920);
const WORD gx = EdidChromaticity(0.1700);
const WORD gy = EdidChromaticity(0.7970);
const WORD bx = EdidChromaticity(0.1310);
const WORD by = EdidChromaticity(0.0460);
// Describe the wire gamut. Accelerated HDR uses the BT.2020 container;
// software rendering is SDR-only and uses the standard sRGB/BT.709 gamut.
const WORD rx = EdidChromaticity(hdr ? 0.7080 : 0.6400);
const WORD ry = EdidChromaticity(hdr ? 0.2920 : 0.3300);
const WORD gx = EdidChromaticity(hdr ? 0.1700 : 0.3000);
const WORD gy = EdidChromaticity(hdr ? 0.7970 : 0.6000);
const WORD bx = EdidChromaticity(hdr ? 0.1310 : 0.1500);
const WORD by = EdidChromaticity(hdr ? 0.0460 : 0.0600);
const WORD wx = EdidChromaticity(0.3127);
const WORD wy = EdidChromaticity(0.3290);
@@ -344,7 +344,7 @@ static void SetChromaticityCoordinates(BYTE coordinates[10])
coordinates[9] = (BYTE)(wy >> 2);
}
static void InitEdidBaseBlock(EdidBaseBlock& base)
static void InitEdidBaseBlock(EdidBaseBlock& base, bool hdr)
{
memcpy(base.header, EDID_HEADER, sizeof(base.header));
@@ -358,12 +358,14 @@ static void InitEdidBaseBlock(EdidBaseBlock& base)
base.version = EDID_VERSION;
base.revision = EDID_REVISION;
base.videoInputDefinition = EDID_VIDEO_INPUT_DIGITAL_10BPC_HDMI_A;
base.videoInputDefinition = hdr ?
EDID_VIDEO_INPUT_DIGITAL_10BPC_HDMI_A :
EDID_VIDEO_INPUT_DIGITAL_8BPC_HDMI_A;
base.horizontalSizeCm = EDID_HORIZONTAL_SIZE_CM;
base.verticalSizeCm = EDID_VERTICAL_SIZE_CM;
base.displayGamma = EDID_DISPLAY_GAMMA_2_2;
base.supportedFeatures = EDID_FEATURES_PREFERRED_TIMING_RGB;
SetChromaticityCoordinates(base.chromaticityCoordinates);
SetChromaticityCoordinates(base.chromaticityCoordinates, hdr);
for (UINT i = 0; i < EDID_STANDARD_TIMING_COUNT; ++i)
base.standardTimings[i] = MakeUnusedStandardTiming();
@@ -572,12 +574,12 @@ bool CEdid::WriteDetailedTiming(BYTE* dtd, const CSettings::DisplayMode& mode)
return true;
}
void CEdid::Build(const CSettings::DisplayModes& modes)
void CEdid::Build(const CSettings::DisplayModes& modes, bool hdr)
{
m_data.assign(static_cast<std::vector<BYTE, std::allocator<BYTE>>::size_type>(EDID_BLOCK_SIZE) * 2, 0);
EdidBaseBlock baseBlock = {};
InitEdidBaseBlock(baseBlock);
InitEdidBaseBlock(baseBlock, hdr);
CSettings::DisplayModes sorted = modes;
std::stable_sort(sorted.begin(), sorted.end(),
@@ -625,10 +627,13 @@ void CEdid::Build(const CSettings::DisplayModes& modes)
ctaBlock.revision = CTA_REVISION;
UINT dataOffset = CTA_HEADER_SIZE;
AppendCtaDataBlock(cta, dataOffset, MakeCtaHdrStaticMetadataDataBlock ());
AppendCtaDataBlock(cta, dataOffset, MakeCtaColorimetryDataBlock ());
AppendCtaDataBlock(cta, dataOffset, MakeCtaHdmiForumVendorSpecificDataBlock());
AppendCtaDataBlock(cta, dataOffset, MakeCtaHdmiVendorSpecificDataBlock ());
if (hdr)
{
AppendCtaDataBlock(cta, dataOffset, MakeCtaHdrStaticMetadataDataBlock ());
AppendCtaDataBlock(cta, dataOffset, MakeCtaColorimetryDataBlock ());
AppendCtaDataBlock(cta, dataOffset, MakeCtaHdmiForumVendorSpecificDataBlock());
AppendCtaDataBlock(cta, dataOffset, MakeCtaHdmiVendorSpecificDataBlock ());
}
ctaBlock.dtdOffset = (BYTE)dataOffset;
ctaBlock.flags = 0x00;