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IDWriteFontFileLoader::CreateStreamFromKey method

Creates a font file stream object that encapsulates an open file resource.

Syntax


virtual HRESULT CreateStreamFromKey(
  [in]   const void * fontFileReferenceKey,
  UINT32  fontFileReferenceKeySize,
  [out]  IDWriteFontFileStream ** fontFileStream
) = 0;

Parameters

fontFileReferenceKey [in]

Type: const void*

A pointer to a font file reference key that uniquely identifies the font file resource within the scope of the font loader being used. The buffer allocated for this key must at least be the size, in bytes, specified by fontFileReferenceKeySize.

fontFileReferenceKeySize

Type: UINT32

The size of font file reference key, in bytes.

fontFileStream [out]

Type: IDWriteFontFileStream**

When this method returns, contains the address of a pointer to the newly created IDWriteFontFileStream object.

Return value

Type: HRESULT

If this method succeeds, it returns S_OK. Otherwise, it returns an HRESULT error code.

Remarks

The resource is closed when the last reference to fontFileStream is released.

Requirements

Minimum supported client

Windows 7, Windows Vista with SP2 and Platform Update for Windows Vista [desktop apps | Windows Store apps]

Minimum supported server

Windows Server 2008 R2, Windows Server 2008 with SP2 and Platform Update for Windows Server 2008 [desktop apps | Windows Store apps]

Header

Dwrite.h

Library

Dwrite.lib

DLL

Dwrite.dll

See also

IDWriteFontFileLoader

 

 

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