116 lines
4.4 KiB
C
116 lines
4.4 KiB
C
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/*
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$Log: S:\products\msprods\oiwh\include\oicmp.h_v $
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*
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* Rev 1.7 24 Apr 1996 16:11:36 RWR08970
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* Add support for LZW horizontal differencing predictor (saved by GFS routines)
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* Requires change to calling sequence of Compress/DecompressImage() display procs
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*
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* Rev 1.6 24 Oct 1995 18:28:26 RWR
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* Change CXDATA ImageBitWidth field from WORD to DWORD
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*
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* Rev 1.5 19 Sep 1995 12:36:14 RWR
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* Expand CXDATA structure to support both old and new compress/expand interfaces
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*
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* Rev 1.4 13 Sep 1995 17:21:00 RWR
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* Preliminary checkin of conditional code supporting new compress/expand calls
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*
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* Rev 1.3 11 Jul 1995 13:27:48 HEIDI
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*
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* added FileId to CXDATA structure
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*
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* Rev 1.2 11 Jul 1995 13:18:50 RWR
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* Add lpLastPointer field to CXDATA (I thought I already did this!)
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*
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* Rev 1.1 07 Jul 1995 17:01:52 RWR
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* Add lpCompressData0 pointer to CXDATA structure
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*
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* Rev 1.0 08 Apr 1995 04:00:28 JAR
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* Initial entry
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*/
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//***************************************************************************
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//
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// oicmp.h
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//
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//***************************************************************************
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/****************************************************************************/
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/* Copyright 1992 (c) Wang Laboratories, Inc. All rights reserved. */
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/****************************************************************************/
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#ifndef OICMP_H
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#define OICMP_H
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/*** Compression type & options for "CXDATA.CompressType" ***/
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#define c_1d 1 /* CCITT G3 1d coding */
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#define c_2d 2 /* CCITT G4 2d coding */
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#define c_pkb 4 /* Packbits coding */
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#define c_glzw 5 /* GIF LZW */
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#define c_tlzw 15 /* TIFF LZW */
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#define c_eol 0x0100 /* include/expect eols (1d only) */
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#define c_pak 0x0200 /* don't start each line on a byte boundary */
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#define c_nuke1 0x0400 /* reserved - better make it a 0 */
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#define c_pre 0x0800 /* include/expect prefixed eol (1d only) */
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#define c_clf 0x1000 /* compress bit-order is left-to-right */
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#define c_xlf 0x2000 /* expand bit-order is left-to-right */
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#define c_nuke2 0x4000 /* zero it - DATACOPY word aligned format */
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#define c_xng 0x8000 /* invert black/white sense of expanded data */
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/*** Errors returned in "CXDATA.Status" ***/
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#define c_eofb 0x00 /* end of compress data - finished expanding */
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#define c_errx 0x01 /* some error occurred */
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#define c_erri 0x02 /* input buffer emptied */
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#define c_erro 0x03 /* output buffer filled */
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/*** Compressed data buffer line splitting in "CXDATA.BufferFlags" ***/
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#define c_lsprv 0x01 /* first line starts in previous buffer */
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#define c_lsnxt 0x02 /* last line continues into next buffer */
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#define c_lseol 0x04 /* first bits are part of an eol */
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#define c_lsbeg 0x08 /* first line begins with an entire eol */
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typedef struct tagCXDATA
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{
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HANDLE hMem;
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WORD ImageType;
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WORD CompressType;
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DWORD ImageBitWidth;
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WORD BufferByteWidth;
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WORD LinesToSkip;
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WORD PixelsToSkip;
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BYTE InputResolution;
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BYTE OutputResolution;
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BYTE Status;
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BYTE BufferFlags;
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LPSTR lpCompressData;
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DWORD CompressBytes;
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LPSTR lpExpandData;
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DWORD ExpandLines;
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DWORD lpLastPointer;
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LPSTR lpCompressData0;
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HANDLE FileId;
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// New fields for replacment compress/expand routines
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LPSTR lpDspBuffer; /* Intermediate buffer for DISPLAY calls */
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DWORD DspCount; /* Data (byte/line) count in DISPLAY buffer */
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DWORD LineCount; /* Total lines to be expanded */
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DWORD CmpOffset; /* Current offset in CompressData buffer */
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} CXDATA, FAR *LPCXDATA;
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/*** Compress and Expand Function Prototypes ***/
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HANDLE FAR PASCAL CompressOpen (LPCXDATA lpCXData);
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int FAR PASCAL CompressData (LPCXDATA lpCXData);
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int FAR PASCAL CompressClose (LPCXDATA lpCXData);
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HANDLE FAR PASCAL CompressAlloc (LPCXDATA lpCXData);
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HANDLE FAR PASCAL ExpandOpen (LPCXDATA lpCXData);
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int FAR PASCAL ExpandData (LPCXDATA lpCXData);
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HANDLE FAR PASCAL ExpandAlloc (LPCXDATA lpCXData);
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void FAR PASCAL MangleData (LPSTR lpsSourceData, LPSTR lpsDestData,
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WORD wNumBytes, WORD wCompressType);
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void FAR PASCAL CmpExFree (LPCXDATA lpCXData);
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#endif /* #ifndef OICMP_H */
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