ITT Rule IDL Version 7.0 User Manual download pdf (Page 255)

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Chapter 10: Creating a File Writer 255

iTool Developer’s Guide Predefined iTool File Writers

Predefined iTool File Writers

The iTool system distributed with IDL includes a number of predefined file writers.

You can include these file writers in an iTool directly by registering the class with

your iTool (as described in “Registering a File Writer” on page 269). You can also

create a new file writer class based on one of the predefined classes.

IDLitWriteASCII

The iTools ASCII file writer uses the IDL PRINTF procedure to print strings to a file.

Registered Properties

STRING_SEPARATOR — A string that is used to separate the values stored in the

ASCII file.

USE_DEFAULT_FORMAT — A boolean value that specifies whether a default

format string should be used.

STRING_FORMAT — A string specifying the format string to be used when writing

the data to the ASCII file. See “Format Codes” in Chapter 18, “Files and

Input/Output” (Application Programming) for a discussion of format codes.

Note

The format code should not include parentheses.

IDLitWriteBinary

The iTools Binary file writer uses the IDL WRITEU procedure to write unformatted

binary data to a file.

Registered Properties

None

IDLitWriteBMP

The iTools BMP file writer uses the IDL WRITE_BMP procedure to write an image

and its color table vectors to a Microsoft Windows Version 3 device independent

bitmap file (

.bmp).

Registered Properties

BIT_DEPTH — Bit depth at which to write the image.

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