ID2D1Geometry：：CombineWithGeometry 方法

将此几何图形与指定的几何图形相结合，并将结果存储在 ID2D1SimplifiedGeometrySink 中。

重载列表

方法	说明
CombineWithGeometry (ID2D1Geometry*，D2D1_COMBINE_MODE，D2D1_MATRIX_3X2_F&，ID2D1SimplifiedGeometrySink*)	将此几何图形与指定的几何图形相结合，并将结果存储在 ID2D1SimplifiedGeometrySink 中。
CombineWithGeometry (ID2D1Geometry*，D2D1_COMBINE_MODE，D2D1_MATRIX_3X2_F*，ID2D1SimplifiedGeometrySink*)	将此几何图形与指定的几何图形相结合，并将结果存储在 ID2D1SimplifiedGeometrySink 中。
CombineWithGeometry (ID2D1Geometry*，D2D1_COMBINE_MODE，D2D1_MATRIX_3X2_F&，FLOAT，ID2D1SimplifiedGeometrySink*)	将此几何图形与指定的几何图形相结合，并将结果存储在 ID2D1SimplifiedGeometrySink 中。
CombineWithGeometry (ID2D1Geometry*，D2D1_COMBINE_MODE，D2D1_MATRIX_3X2_F*，FLOAT，ID2D1SimplifiedGeometrySink*)	将此几何图形与指定的几何图形相结合，并将结果存储在 ID2D1SimplifiedGeometrySink 中。

示例

以下代码使用每种不同的组合模式来组合两个 ID2D1EllipseGeometry 对象。

HRESULT DemoApp::CreateGeometryResources()
{
    HRESULT hr = S_OK;
    ID2D1GeometrySink *pGeometrySink = NULL;

    // Create the first ellipse geometry to merge.
    const D2D1_ELLIPSE circle1 = D2D1::Ellipse(
        D2D1::Point2F(75.0f, 75.0f),
        50.0f,
        50.0f
        );

    hr = m_pD2DFactory->CreateEllipseGeometry(
        circle1,
        &m_pCircleGeometry1
        );

    if (SUCCEEDED(hr))
    {
        // Create the second ellipse geometry to merge.
        const D2D1_ELLIPSE circle2 = D2D1::Ellipse(
            D2D1::Point2F(125.0f, 75.0f),
            50.0f,
            50.0f
            );

        hr = m_pD2DFactory->CreateEllipseGeometry(circle2, &m_pCircleGeometry2);
    }


    if (SUCCEEDED(hr))
    {
        //
        // Use D2D1_COMBINE_MODE_UNION to combine the geometries.
        //
        hr = m_pD2DFactory->CreatePathGeometry(&m_pPathGeometryUnion);

        if (SUCCEEDED(hr))
        {
            hr = m_pPathGeometryUnion->Open(&pGeometrySink);

            if (SUCCEEDED(hr))
            {
                hr = m_pCircleGeometry1->CombineWithGeometry(
                    m_pCircleGeometry2,
                    D2D1_COMBINE_MODE_UNION,
                    NULL,
                    NULL,
                    pGeometrySink
                    );
            }

            if (SUCCEEDED(hr))
            {
                hr = pGeometrySink->Close();
            }

            SafeRelease(&pGeometrySink);
        }
    }

    if (SUCCEEDED(hr))
    {
        //
        // Use D2D1_COMBINE_MODE_INTERSECT to combine the geometries.
        //
        hr = m_pD2DFactory->CreatePathGeometry(&m_pPathGeometryIntersect);

        if (SUCCEEDED(hr))
        {
            hr = m_pPathGeometryIntersect->Open(&pGeometrySink);

            if (SUCCEEDED(hr))
            {
                hr = m_pCircleGeometry1->CombineWithGeometry(
                    m_pCircleGeometry2,
                    D2D1_COMBINE_MODE_INTERSECT,
                    NULL,
                    NULL,
                    pGeometrySink
                    );
            }

            if (SUCCEEDED(hr))
            {
                hr = pGeometrySink->Close();
            }

            SafeRelease(&pGeometrySink);
        }
    }

    if (SUCCEEDED(hr))
    {
        //
        // Use D2D1_COMBINE_MODE_XOR to combine the geometries.
        //
        hr = m_pD2DFactory->CreatePathGeometry(&m_pPathGeometryXOR);

        if (SUCCEEDED(hr))
        {
            hr = m_pPathGeometryXOR->Open(&pGeometrySink);

            if (SUCCEEDED(hr))
            {
                hr = m_pCircleGeometry1->CombineWithGeometry(
                    m_pCircleGeometry2,
                    D2D1_COMBINE_MODE_XOR,
                    NULL,
                    NULL,
                    pGeometrySink
                    );
            }

            if (SUCCEEDED(hr))
            {
                hr = pGeometrySink->Close();
            }

            SafeRelease(&pGeometrySink);
        }
    }

    if (SUCCEEDED(hr))
    {
        //
        // Use D2D1_COMBINE_MODE_EXCLUDE to combine the geometries.
        //
        hr = m_pD2DFactory->CreatePathGeometry(&m_pPathGeometryExclude);

        if (SUCCEEDED(hr))
        {
            hr = m_pPathGeometryExclude->Open(&pGeometrySink);

            if (SUCCEEDED(hr))
            {
                hr = m_pCircleGeometry1->CombineWithGeometry(
                    m_pCircleGeometry2,
                    D2D1_COMBINE_MODE_EXCLUDE,
                    NULL,
                    NULL,
                    pGeometrySink
                    );
            }

            if (SUCCEEDED(hr))
            {
                hr = pGeometrySink->Close();
            }

            SafeRelease(&pGeometrySink);
        }
    }

    return hr;
}

此代码生成如下图所示的输出。

要求

要求	值
库	D2d1.lib
DLL	D2d1.dll

另请参阅

ID2D1Geometry