graPHIGS Programming Interface: Subroutine Reference

The graPHIGS Programming Interface : Subroutine Reference

GPQPO - Inquire Available Pixel Operations

GPQPO (ncid, type, start, number, errind, totnum, op)

Note:

This subroutine is a Workstation Description Table (WDT) inquiry. For an overview, see "WDT Inquiries"

Purpose

Use GPQPO to inquire the available pixel operations on the specified nucleus.

If the inquired information is available, then the graPHIGS API sets the error indicator to zero and returns the values in the output parameters. If the error indicator is 543 (the start value exceeds the extent of the available data), then only the total number (totnum) parameter is set. If the inquired information is unavailable, then the error indicator (errind) contains an error number indicating the reason, and the values returned in the output parameters are unpredictable.

Parameters

ncid -- specified by user, fullword integer

Nucleus identifier.

type -- specified by user, fullword integer

Type of pixel operations (1=TWO_OPERAND, 2=THREE_OPERAND )

start -- specified by user, fullword integer

Starting member in the list of available operations (>=1)

number -- specified by user, fullword integer

Number of pixel operation entries requested (>=0)

errind -- returned by the graPHIGS API, fullword integer

Error indicator. If the error indicator is zero, the request has been completed. Otherwise, one of the following errors exists:

202: SPECIFIED NUCLEUS DOES NOT EXIST
295: PIXEL OPERATION TYPE IS INVALID
538: START VALUE < ONE
539: REQUESTED NUMBER < ZERO
543: START EXCEEDS DATA EXTENT. TOTAL NUMBER AVAILABLE RETURNED

totnum -- returned by the graPHIGS API, fullword integer

Total number of available operand pixel operations.

op -- returned by the graPHIGS API, array of fullword integers

List of available operations.

Error Codes

None

Related Subroutines

None

RCP code

201345802 (X'0C004B0A')