IDWriteFontFileLoader::CreateStreamFromKey method (dwrite.h)

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

Syntax

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

Parameters

[in] fontFileReferenceKey

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.

[out] fontFileStream

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

See also

IDWriteFontFileLoader