EngFntCacheAlloc function (winddi.h)

Article
02/22/2024

The EngFntCacheAlloc function allocates storage for a font that is to be stored in cached memory.

Syntax

ENGAPI PVOID EngFntCacheAlloc(
  [in] ULONG FastCheckSum,
  [in] ULONG ulSize
);

Parameters

[in] FastCheckSum

Specifies the checksum for the font.

[in] ulSize

Specifies the number of bytes of storage to allocate.

Return value

On success, this function returns the address of the cache of font data. Otherwise, it returns NULL.

Remarks

When the font driver calls this function, the font engine allocates memory in which the font driver stores font data.

The font engine calls the font driver's DrvLoadFontFile entry point when a font file is first loaded. It is in this call that the font driver receives a value for FastCheckSum, which it subsequently uses when it calls this function.

Requirements

Requirement	Value
Minimum supported client	This function is available in Windows XP and later.
Target Platform	Universal
Header	winddi.h (include Winddi.h)
Library	Win32k.lib
DLL	Win32k.sys