IPrintOemUni::TTYGetInfo method (prcomoem.h)

Artikel
04/01/2021

The IPrintOemUni::TTYGetInfo method enables a rendering plug-in to supply Unidrv with information relevant to text-only printers.

Syntax

HRESULT TTYGetInfo(
  PDEVOBJ pdevobj,
  DWORD   dwInfoIndex,
  PVOID   pOutputBuf,
  DWORD   dwSize,
  DWORD   *pcbcNeeded
);

Parameters

pdevobj

Caller-supplied pointer to a DEVOBJ structure.

dwInfoIndex

Caller-supplied constant identifying the type of information being requested. The following constant values are defined:

OEMTTY_INFO_CODEPAGE

The pOutputBuf parameter points to a DWORD in which the method should return the number of the code page to be used.

OEMTTY_INFO_MARGINS

The pOutputBuf parameter points to a RECT structure in which the method should return page margin widths, in tenths of millimeters (for example, 20 represents 2 mm). If the entire page is printable, all margin values must be 0.

OEMTTY_INFO_NUM_UFMS

The pOutputBuf parameter points to a DWORD in which the method should return the number of resource IDs of the UFMs for 10, 12, and 17 CPI fonts. To actually obtain these resource IDs, perform a query using OEMTTY_INFO_UFM_IDS.

OEMTTY_INFO_UFM_IDS

The pOutputBuf parameter points to an array of DWORDs of sufficient size to hold the number of resource IDs of the UFMs for 10, 12, and 17 CPI fonts. (This number is obtained by using OEMTTY_INFO_NUM_UFMS in a query.) The method should return the resource IDs of the UFMs for 10,12, and 17 CPI fonts.

pOutputBuf

Caller-supplied pointer to a buffer to receive the requested information.

dwSize

Caller-supplied size, in bytes, of the buffer pointed to by pOutputBuf.

pcbcNeeded

Caller-supplied pointer to a location to receive the number of bytes written into the buffer pointed to by pOutputBuf. If the number of bytes required is smaller than the number specified by dwSize, the method should supply the required size and return E_FAIL.

Return value

The method must return one of the following values.

Return code	Description
S_OK	The operation succeeded.
E_FAIL	The operation failed.
E_NOTIMPL	The method is not implemented.

Remarks

The IPrintOemUni::TTYGetInfo method is optional. If a rendering plug-in implements this method, the plug-in's IPrintOemUni::GetImplementedMethod method must return S_OK when it receives "TTYGetInfo" as input.

Requirements

Requirement	Value
Target Platform	Desktop
Header	prcomoem.h (include Prcomoem.h)

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