ID2D1RenderTarget::CreateGradientStopCollection 方法

从指定的D2D1_GRADIENT_STOP结构数组创建 ID2D1GradientStopCollection

重载列表

方法 说明
CreateGradientStopCollection (D2D1_GRADIENT_STOP*,D2D1_GAMMA,D2D1_EXTEND_MODE,ID2D1GradientStopCollection**) 从指定的渐变停止点、颜色内插伽玛和扩展模式创建 ID2D1GradientStopCollection
CreateGradientStopCollection (D2D1_GRADIENT_STOP*,ID2D1GradientStopCollection**) 从使用D2D1_GAMMA_2_2颜色内插伽玛和固定器扩展模式的指定渐变停止点创建 ID2D1GradientStopCollection

示例

以下示例创建渐变停止点数组,然后使用它们创建 ID2D1GradientStopCollection

// Create an array of gradient stops to put in the gradient stop
// collection that will be used in the gradient brush.
ID2D1GradientStopCollection *pGradientStops = NULL;

D2D1_GRADIENT_STOP gradientStops[2];
gradientStops[0].color = D2D1::ColorF(D2D1::ColorF::Yellow, 1);
gradientStops[0].position = 0.0f;
gradientStops[1].color = D2D1::ColorF(D2D1::ColorF::ForestGreen, 1);
gradientStops[1].position = 1.0f;
// Create the ID2D1GradientStopCollection from a previously
// declared array of D2D1_GRADIENT_STOP structs.
hr = m_pRenderTarget->CreateGradientStopCollection(
    gradientStops,
    2,
    D2D1_GAMMA_2_2,
    D2D1_EXTEND_MODE_CLAMP,
    &pGradientStops
    );

下一个代码示例使用 ID2D1GradientStopCollection 创建 ID2D1LinearGradientBrush

// The line that determines the direction of the gradient starts at
// the upper-left corner of the square and ends at the lower-right corner.

if (SUCCEEDED(hr))
{
    hr = m_pRenderTarget->CreateLinearGradientBrush(
        D2D1::LinearGradientBrushProperties(
            D2D1::Point2F(0, 0),
            D2D1::Point2F(150, 150)),
        pGradientStops,
        &m_pLinearGradientBrush
        );
}

要求

要求
标头
D2d1_1.h (包括 D2d1.h)

D2d1.lib
DLL
D2d1.dll

另请参阅

ID2D1RenderTarget

D2D1_GRADIENT_STOP

如何创建线性渐变画笔

如何创建径向渐变画笔

画笔概述