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QUERY_GIF

QUERY_GIF is a method of obtaining information about a GIF image file without having to read the file. See QUERY_* Routines for more information.


Note
The GIF format uses compression technologies that may be subject to license restrictions. If you receive a warning when attempting to use this routine, contact ITT Visual Information Solutions for information about licensing options.

Syntax

Result = QUERY_GIF ( Filename [, Info] )

Return Value

This routine returns a long with the value of 1 (one) if the query was successful (and the file type was correct) or 0 (zero) on failure.

Arguments

Filename

A scalar string containing the pathname of the GIF file to query.

Info

Returns an anonymous structure containing information about the image in the file. The Info.TYPE field will return the value `GIF'.


Note
See QUERY_* Routines for detailed structure info.

Keywords

None

Version History

5.2
Introduced

See Also

QUERY_* Routines, READ_GIF, WRITE_GIF

  IDL Online Help (March 06, 2007)