Initial import of the CDE 2.1.30 sources from the Open Group.

cde/lib/DtHelp/il/ildecompg4.h

@@ -0,0 +1,159 @@
+/* $XConsortium: ildecompg4.h /main/3 1995/10/23 15:45:43 rswiston $ */
+/**---------------------------------------------------------------------
+***	
+***    (c)Copyright 1991 Hewlett-Packard Co.
+***    
+***                             RESTRICTED RIGHTS LEGEND
+***    Use, duplication, or disclosure by the U.S. Government is subject to
+***    restrictions as set forth in sub-paragraph (c)(1)(ii) of the Rights in
+***    Technical Data and Computer Software clause in DFARS 252.227-7013.
+***                             Hewlett-Packard Company
+***                             3000 Hanover Street
+***                             Palo Alto, CA 94304 U.S.A.
+***    Rights for non-DOD U.S. Government Departments and Agencies are as set
+***    forth in FAR 52.227-19(c)(1,2).
+***
+***-------------------------------------------------------------------*/
+
+
+
+/* ====================================================================================
+        -------------------- Macros --------------------
+   ==================================================================================== */
+
+#define READ32_LSB(address) \
+   (* ((unsigned char *)(address))         + \
+   (*(((unsigned char *)(address))+1)<< 8) + \
+   (*(((unsigned char *)(address))+2)<<16) + \
+   (*(((unsigned char *)(address))+3)<<24))
+
+
+#define READ32_MSB(address) \
+   (ilBitReverseTable[* ((unsigned char *)(address))]         + \
+   (ilBitReverseTable[*(((unsigned char *)(address))+1)] << 8) + \
+   (ilBitReverseTable[*(((unsigned char *)(address))+2)]<<16) + \
+   (ilBitReverseTable[*(((unsigned char *)(address))+3)]<<24) )
+
+
+
+#define GET_VALUE_LSB(value,base, offset, mask) {  \
+    if (offset > pPriv->maxSrcPos) return IL_ERROR_COMPRESSED_DATA; \
+    value = (READ32_LSB((base) + ((offset) >> 3)) >> ((offset) & 7) & (mask)); \
+}
+
+#define GET_VALUE_MSB(value,base, offset, mask) {  \
+    if (offset > pPriv->maxSrcPos) return IL_ERROR_COMPRESSED_DATA; \
+    value = (READ32_MSB((base) + ((offset) >> 3)) >> ((offset) & 7) & (mask)); \
+}
+ 
+
+
+
+            
+/* ====================================================================================
+        -------------------- Code table constants --------------------
+   ==================================================================================== */
+
+#define G4K_BlackTableSize      8192
+#define G4K_WhiteTableSize      4096
+#define G4K_DecodeTableSize     4096
+#define G4K_MinSrcLen             14    /* Defines the maximum codeword size in bits */
+#define G4M_WhiteRun          0x0FFF
+#define G4M_BlackRun          0x1FFF
+#define G4M_Codeword          0x0FFF
+
+
+
+/* ====================================================================================
+        -------------------- Decoding mode constants --------------------
+   ==================================================================================== */
+
+#define G4K_ModeNewScan            1
+#define G4K_ModeCodeword           2
+#define G4K_ModeFirstRun           3
+#define G4K_ModeSecondRun          4
+
+
+/*
+    These constants define the usage of the change lists. If the change list
+    index is even, a white run is described. If a black run is being defined,
+    the changelist index will be odd.
+*/
+#define	G4K_WhiteRun               1
+#define G4K_BlackRun               0
+
+
+/* Code type constants */
+
+#define G4K_CodetypeTerminator     2
+#define G4K_CodetypeEol           -1
+#define G4K_CodetypeMakeup         1
+
+
+/* Code value constants */
+
+#define G4K_CodevaluePass          4
+#define G4K_CodevalueHoriz         5
+#define G4K_CodevalueV0            0
+#define G4K_CodevalueVR1           1
+#define G4K_CodevalueVL1          -1
+#define G4K_CodevalueVR2           2
+#define G4K_CodevalueVL2          -2
+#define G4K_CodevalueVR3           3
+#define G4K_CodevalueVL3          -3
+
+
+
+/* ====================================================================================
+        -------------------- Status code definitions --------------------
+   ==================================================================================== */
+
+#define G4K_StsEol                -1
+#define G4K_StsDcdErr             -2
+#define G4K_StsSrcExh             -3
+#define G4K_StsDstFul             -4
+#define G4K_AlgorithmAbort        62
+
+/* define to find out the value of the bit (1 or 0) in the image line      */
+#define	PIXEL(buf,ix)	((((buf)[(ix)>>3]) >> (7-((ix)&7))) & 1)             
+
+/* define to find out the value of the bit (1 or 0) in the image line      */
+#define	PIXEL_LSB(buf,ix)	((ilBitReverseTable[((buf)[(ix)>>3])] >> (7-((ix)&7))) & 1)             
+                 
+
+
+
+/* ========================================================================
+   Decompression private data structure definition
+   ======================================================================== */
+
+typedef struct {
+   int                  width;         /* width of the image              */   
+   long                 compFlags;     /* flags denoting G4 comp. options */
+   ilBool               white;         /* value of the white pixel 0 or 1 */
+   ilPtr                ImageP;        /* ptr. to the Source Image begin  */
+   int                  srcpos;        /* bit position is Src image start */
+   ilBool               Is_Lsb_First;  /* true if  LSB is desired         */
+   ilPtr                gpRefLine;     /* ptr.to refrence line for 2d coding */
+   long                 nDstLineBytes; /* no.of bytes in the Image        */
+   long                 maxSrcPos;     /* size of the src Image in bits   */
+}  ilDecompG3G4PrivRec, *ilDecompG3G4PrivPtr;
+
+/* ====================================================================================
+   -------------------- Huffman decode table structure definition --------------------
+   ==================================================================================== */
+
+typedef struct {
+    short           value;
+    unsigned char   length;
+    char            type;
+} ilDecompG4HuffTableRec, *ilDecompG4HuffTablePtr;
+
+typedef	const ilDecompG4HuffTableRec* 	ilDecompG4HuffTablePtrConst;
+
+IL_EXTERN const ilDecompG4HuffTableRec ilArFax1DDecodeWhite[G4K_WhiteTableSize];
+
+IL_EXTERN const ilDecompG4HuffTableRec ilArFax1DDecodeBlack[G4K_BlackTableSize];
+
+IL_EXTERN const ilDecompG4HuffTableRec ilArFax2DDecodeTable[G4K_DecodeTableSize];
+