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[idd/client] apply the Windows display color transform

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Honor the IddCx 3x4 XYZ matrix and post-transfer LUT in the IDD
conversion pipeline. Carry transform changes to the client so EGL applies
the same calibration to hardware cursors, and invalidate the full frame
whenever calibration changes.
This commit is contained in:
Geoffrey McRae
2026-07-19 03:11:42 +10:00
parent ad5d7753e8
commit 26ca90893a
17 changed files with 766 additions and 48 deletions
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49
idd/LGIdd/Device.cpp
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@@ -28,6 +28,8 @@
#include <IddCx.h>
#include <avrt.h>
#include <wrl.h>
#include <memory>
#include <utility>
#include "CDebug.h"
#include "CIndirectDeviceContext.h"
@@ -192,8 +194,51 @@ NTSTATUS LGIddMonitorSetDefaultHdrMetadata(IDDCX_MONITOR monitor,
NTSTATUS LGIddMonitorSetGammaRamp(IDDCX_MONITOR monitor, const IDARG_IN_SET_GAMMARAMP* inArgs)
{
UNREFERENCED_PARAMETER(monitor);
UNREFERENCED_PARAMETER(inArgs);
auto* wrapper = WdfObjectGet_CIndirectMonitorContextWrapper(monitor);
auto* ctx = wrapper->context->GetDeviceContext();
if (inArgs->Type == IDDCX_GAMMARAMP_TYPE_DEFAULT)
{
ctx->SetColorTransform(nullptr);
DEBUG_INFO("Display color transform reset to default");
return STATUS_SUCCESS;
}
if (inArgs->Type != IDDCX_GAMMARAMP_TYPE_3x4_COLORSPACE_TRANSFORM)
{
DEBUG_WARN("Unsupported gamma ramp type %u", inArgs->Type);
return STATUS_NOT_SUPPORTED;
}
if (!inArgs->pGammaRampData ||
inArgs->GammaRampSizeInBytes <
sizeof(IDDCX_GAMMARAMP_3X4_COLORSPACE_TRANSFORM))
{
DEBUG_ERROR("Invalid 3x4 color transform buffer (%u bytes)",
inArgs->GammaRampSizeInBytes);
return STATUS_INVALID_PARAMETER;
}
const auto* input = static_cast<
const IDDCX_GAMMARAMP_3X4_COLORSPACE_TRANSFORM*>(
inArgs->pGammaRampData);
auto transform = std::make_shared<D12ColorTransform>();
transform->matrixEnabled = !!input->MatrixEnabled;
transform->scalar = input->ScalarMultiplier;
transform->lutEnabled = !!input->LutEnabled;
memcpy(transform->matrix, input->ColorMatrix3x4,
sizeof(transform->matrix));
for (unsigned i = 0; i < 4096; ++i)
{
transform->lut[i][0] = input->LookupTable1D[i].Red;
transform->lut[i][1] = input->LookupTable1D[i].Green;
transform->lut[i][2] = input->LookupTable1D[i].Blue;
transform->lut[i][3] = 1.0f;
}
ctx->SetColorTransform(std::move(transform));
DEBUG_INFO("Display color transform updated (matrix:%d lut:%d)",
input->MatrixEnabled, input->LutEnabled);
return STATUS_SUCCESS;
}