源码【VS2019可直接运行】

#include <iostream>
#include <windows.h>
#include <dxgi1_6.h>

#pragma comment(lib, "dxgi.lib")

int main() {
    // Step 1: Create a DXGI factory
    IDXGIFactory6* pFactory = nullptr;
    HRESULT hr = CreateDXGIFactory1(IID_PPV_ARGS(&pFactory));
    if (FAILED(hr)) {
        std::cout << "Failed to create DXGI factory: " << std::hex << hr << std::endl;
        return 1;
    }

    // Step 2: Enumerate the display adapters
    IDXGIAdapter1* pAdapter = nullptr;
    hr = pFactory->EnumAdapters1(0, &pAdapter);
    if (FAILED(hr)) {
        std::cout << "Failed to enumerate adapters: " << std::hex << hr << std::endl;
        return 1;
    }

    // Step 3: Enumerate the outputs (display monitors)
    IDXGIOutput* pOutput = nullptr;
    hr = pAdapter->EnumOutputs(0, &pOutput);
    if (FAILED(hr)) {
        std::cout << "Failed to enumerate outputs: " << std::hex << hr << std::endl;
        return 1;
    }

    // Step 4: Query IDXGIOutput6 interface
    IDXGIOutput6* pOutput6 = nullptr;
    hr = pOutput->QueryInterface(IID_PPV_ARGS(&pOutput6));
    if (FAILED(hr)) {
        std::cout << "Failed to query IDXGIOutput6 interface: " << std::hex << hr << std::endl;
        return 1;
    }

    // Step 5: Get DXGI_OUTPUT_DESC1 structure
    DXGI_OUTPUT_DESC1 outputDesc1;
    hr = pOutput6->GetDesc1(&outputDesc1);
    if (FAILED(hr)) {
        std::cout << "Failed to get DXGI_OUTPUT_DESC1: " << std::hex << hr << std::endl;
        return 1;
    }

    printf("R(%.4f %.4f) G(%.4f %.4f) B(%.4f %.4f) W(%.4f %.4f)\nLuminance:%.4f->%.4fcd/m2\n", 
        outputDesc1.RedPrimary[0], outputDesc1.RedPrimary[1],
        outputDesc1.GreenPrimary[0], outputDesc1.GreenPrimary[1],
        outputDesc1.BluePrimary[0], outputDesc1.BluePrimary[1],
        outputDesc1.WhitePoint[0], outputDesc1.WhitePoint[1],
        outputDesc1.MinLuminance, outputDesc1.MaxLuminance
        );
    std::cout << "Current Color Space: " << outputDesc1.ColorSpace << std::endl;

    pOutput6->Release();
    pOutput->Release();
    pAdapter->Release();
    pFactory->Release();
    getchar();

    return 0;
}

输出

R(0.6846 0.3096) G(0.2695 0.6602) B(0.1504 0.0596) W(0.3135 0.3291)
Luminance:0.5000->270.0000cd/m2
Current Color Space: 0

该输出表示色域坐标为：R(0.6846 0.3096) G(0.2695 0.6602) B(0.1504 0.0596) W(0.3135 0.3291)
最低亮度为0.5，最高亮度为270，对比度约为540，这么差？？[存疑]
我们查资料发现和P3-D65非常接近，事实也确实如此（P3-D65色品坐标如下图）