Copyright © 1985, 1986 by Xerox Corporation. All rights reserved.

last edited by castillo 18-Jun-85 17:59:47

Rick Beach, June 17, 1986 12:09:04 pm PDT

This module defines the interface to the Xerox compression

routines.

Intialize must be called first with the heap to be used to store

internal data.

CompressPlate is called to perform the compression. The

parameter, "scanLineProc" is used by the compressor to get

the scan lines. "putBitsProc" is used to output the compressed

pixels to the output.

PutBitsProc: TYPE = PROCEDURE [val: CARDINAL, bits: INTEGER];

ScanLineProc: TYPE = PROCEDURE RETURNS [current: REF ¬ NIL, previous: REF ¬ NIL];

CompressPlate: PROCEDURE [scanLen: CARDINAL,
scanLineProc: ScanLineProc, putBitsProc: PutBitsProc]
RETURNS [xPixels: CARDINAL, byteSize: LONG CARDINAL];

Initialize: PROCEDURE [];

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