187 lines
7.1 KiB
C
187 lines
7.1 KiB
C
/*
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* CDE - Common Desktop Environment
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*
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* Copyright (c) 1993-2012, The Open Group. All rights reserved.
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*
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* These libraries and programs are free software; you can
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* redistribute them and/or modify them under the terms of the GNU
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* Lesser General Public License as published by the Free Software
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* Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* These libraries and programs are distributed in the hope that
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* they will be useful, but WITHOUT ANY WARRANTY; without even the
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* implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU Lesser General Public License for more
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* details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with these libraries and programs; if not, write
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* to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
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* Floor, Boston, MA 02110-1301 USA
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*/
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/* $XConsortium: ildecompg4.h /main/3 1995/10/23 15:45:43 rswiston $ */
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/**---------------------------------------------------------------------
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***
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*** (c)Copyright 1991 Hewlett-Packard Co.
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***
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*** RESTRICTED RIGHTS LEGEND
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*** Use, duplication, or disclosure by the U.S. Government is subject to
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*** restrictions as set forth in sub-paragraph (c)(1)(ii) of the Rights in
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*** Technical Data and Computer Software clause in DFARS 252.227-7013.
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*** Hewlett-Packard Company
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*** 3000 Hanover Street
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*** Palo Alto, CA 94304 U.S.A.
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*** Rights for non-DOD U.S. Government Departments and Agencies are as set
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*** forth in FAR 52.227-19(c)(1,2).
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***
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***-------------------------------------------------------------------*/
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/* ====================================================================================
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-------------------- Macros --------------------
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==================================================================================== */
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#define READ32_LSB(address) \
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(* ((unsigned char *)(address)) + \
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(*(((unsigned char *)(address))+1)<< 8) + \
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(*(((unsigned char *)(address))+2)<<16) + \
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(*(((unsigned char *)(address))+3)<<24))
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#define READ32_MSB(address) \
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(ilBitReverseTable[* ((unsigned char *)(address))] + \
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(ilBitReverseTable[*(((unsigned char *)(address))+1)] << 8) + \
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(ilBitReverseTable[*(((unsigned char *)(address))+2)]<<16) + \
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(ilBitReverseTable[*(((unsigned char *)(address))+3)]<<24) )
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#define GET_VALUE_LSB(value,base, offset, mask) { \
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if (offset > pPriv->maxSrcPos) return IL_ERROR_COMPRESSED_DATA; \
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value = (READ32_LSB((base) + ((offset) >> 3)) >> ((offset) & 7) & (mask)); \
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}
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#define GET_VALUE_MSB(value,base, offset, mask) { \
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if (offset > pPriv->maxSrcPos) return IL_ERROR_COMPRESSED_DATA; \
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value = (READ32_MSB((base) + ((offset) >> 3)) >> ((offset) & 7) & (mask)); \
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}
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/* ====================================================================================
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-------------------- Code table constants --------------------
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==================================================================================== */
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#define G4K_BlackTableSize 8192
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#define G4K_WhiteTableSize 4096
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#define G4K_DecodeTableSize 4096
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#define G4K_MinSrcLen 14 /* Defines the maximum codeword size in bits */
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#define G4M_WhiteRun 0x0FFF
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#define G4M_BlackRun 0x1FFF
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#define G4M_Codeword 0x0FFF
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/* ====================================================================================
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-------------------- Decoding mode constants --------------------
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==================================================================================== */
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#define G4K_ModeNewScan 1
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#define G4K_ModeCodeword 2
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#define G4K_ModeFirstRun 3
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#define G4K_ModeSecondRun 4
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/*
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These constants define the usage of the change lists. If the change list
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index is even, a white run is described. If a black run is being defined,
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the changelist index will be odd.
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*/
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#define G4K_WhiteRun 1
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#define G4K_BlackRun 0
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/* Code type constants */
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#define G4K_CodetypeTerminator 2
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#define G4K_CodetypeEol -1
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#define G4K_CodetypeMakeup 1
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/* Code value constants */
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#define G4K_CodevaluePass 4
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#define G4K_CodevalueHoriz 5
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#define G4K_CodevalueV0 0
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#define G4K_CodevalueVR1 1
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#define G4K_CodevalueVL1 -1
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#define G4K_CodevalueVR2 2
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#define G4K_CodevalueVL2 -2
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#define G4K_CodevalueVR3 3
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#define G4K_CodevalueVL3 -3
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/* ====================================================================================
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-------------------- Status code definitions --------------------
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==================================================================================== */
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#define G4K_StsEol -1
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#define G4K_StsDcdErr -2
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#define G4K_StsSrcExh -3
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#define G4K_StsDstFul -4
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#define G4K_AlgorithmAbort 62
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/* define to find out the value of the bit (1 or 0) in the image line */
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#define PIXEL(buf,ix) ((((buf)[(ix)>>3]) >> (7-((ix)&7))) & 1)
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/* define to find out the value of the bit (1 or 0) in the image line */
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#define PIXEL_LSB(buf,ix) ((ilBitReverseTable[((buf)[(ix)>>3])] >> (7-((ix)&7))) & 1)
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/* ========================================================================
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Decompression private data structure definition
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======================================================================== */
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typedef struct {
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int width; /* width of the image */
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long compFlags; /* flags denoting G4 comp. options */
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ilBool white; /* value of the white pixel 0 or 1 */
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ilPtr ImageP; /* ptr. to the Source Image begin */
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int srcpos; /* bit position is Src image start */
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ilBool Is_Lsb_First; /* true if LSB is desired */
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ilPtr gpRefLine; /* ptr.to refrence line for 2d coding */
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long nDstLineBytes; /* no.of bytes in the Image */
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long maxSrcPos; /* size of the src Image in bits */
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} ilDecompG3G4PrivRec, *ilDecompG3G4PrivPtr;
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/* ====================================================================================
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-------------------- Huffman decode table structure definition --------------------
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==================================================================================== */
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typedef struct {
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short value;
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unsigned char length;
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char type;
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} ilDecompG4HuffTableRec, *ilDecompG4HuffTablePtr;
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typedef const ilDecompG4HuffTableRec* ilDecompG4HuffTablePtrConst;
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IL_EXTERN const ilDecompG4HuffTableRec ilArFax1DDecodeWhite[G4K_WhiteTableSize];
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IL_EXTERN const ilDecompG4HuffTableRec ilArFax1DDecodeBlack[G4K_BlackTableSize];
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IL_EXTERN const ilDecompG4HuffTableRec ilArFax2DDecodeTable[G4K_DecodeTableSize];
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IL_EXTERN ilError _ilDecompG4Line(
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ilDecompG3G4PrivPtr pPriv,
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ilPtr pRefLine,
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ilPtr dstImageP
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);
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