IDWriteTextFormat Interface

The IDWriteTextFormat interface describes the font and paragraph properties used to format text, and it describes locale information.

Mitglieder

IDWriteTextFormatSchnittstelle erbt von der IUnknown-Schnittstelle. IDWriteTextFormat umfasst auch die folgenden Typen von Mitgliedern:

• Methoden

Methoden

IDWriteTextFormatSchnittstelle umfasst die folgenden Methoden.

Hinweise

To get a reference to the IDWriteTextFormat interface, the application must call the IDWriteFactory::CreateTextFormat method as shown in the following code.

if (SUCCEEDED(hr))
{
    hr = pDWriteFactory_->CreateTextFormat(
        L"Gabriola",
        NULL,
        DWRITE_FONT_WEIGHT_REGULAR,
        DWRITE_FONT_STYLE_NORMAL,
        DWRITE_FONT_STRETCH_NORMAL,
        72.0f,
        L"en-us",
        &pTextFormat_
        );
}

When creating an IDWriteTextFormat object using the CreateTextFormat function, the application specifies the font family, font collection, font weight, font size, and locale name for the text format.

These properties cannot be changed after the IDWriteTextFormat object is created. To change these properties, a new IDWriteTextFormat object must be created with the desired properties.

The IDWriteTextFormat interface is used to draw text with a single format

To draw text with multiple formats, or to use a custom text renderer, use the IDWriteTextLayout interface. IDWriteTextLayout enables the application to change the format for ranges of text within the string. The IDWriteFactory::CreateTextLayout takes an IDWriteTextFormat object as a parameter and initially applies the format information to the entire string.

This object may not be thread-safe, and it may carry the state of text format change.

DirectWrite and Direct2D

To draw simple text with a single format, Direct2D provides the ID2D1RenderTarget::DrawText method, which draws a string using the format information provided by an IDWriteTextFormat object.

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