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dmtxstatic.h
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dmtxstatic.h
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/**
* libdmtx - Data Matrix Encoding/Decoding Library
* Copyright 2008, 2009 Mike Laughton. All rights reserved.
*
* See LICENSE file in the main project directory for full
* terms of use and distribution.
*
* Contact: Mike Laughton <mike@dragonflylogic.com>
*
* \file dmtxstatic.h
* \brief Static header
*/
#ifndef __DMTXSTATIC_H__
#define __DMTXSTATIC_H__
#define DmtxAlmostZero 0.000001
#define DmtxAlmostInfinity -1
#define DmtxValueC40Latch 230
#define DmtxValueTextLatch 239
#define DmtxValueX12Latch 238
#define DmtxValueEdifactLatch 240
#define DmtxValueBase256Latch 231
#define DmtxValueCTXUnlatch 254
#define DmtxValueEdifactUnlatch 31
#define DmtxValueAsciiPad 129
#define DmtxValueAsciiUpperShift 235
#define DmtxValueCTXShift1 0
#define DmtxValueCTXShift2 1
#define DmtxValueCTXShift3 2
#define DmtxValueFNC1 232
#define DmtxValueStructuredAppend 233
#define DmtxValue05Macro 236
#define DmtxValue06Macro 237
#define DmtxValueECI 241
#define DmtxC40TextBasicSet 0
#define DmtxC40TextShift1 1
#define DmtxC40TextShift2 2
#define DmtxC40TextShift3 3
#define DmtxUnlatchExplicit 0
#define DmtxUnlatchImplicit 1
#define DmtxChannelValid 0x00
#define DmtxChannelUnsupportedChar 0x01 << 0
#define DmtxChannelCannotUnlatch 0x01 << 1
#undef min
#define min(X,Y) (((X) < (Y)) ? (X) : (Y))
#undef max
#define max(X,Y) (((X) > (Y)) ? (X) : (Y))
typedef enum {
DmtxEncodeNormal, /* Use normal scheme behavior (e.g., ASCII auto) */
DmtxEncodeCompact, /* Use only compact format within scheme */
DmtxEncodeFull /* Use only fully expanded format within scheme */
} DmtxEncodeOption;
typedef enum {
DmtxRangeGood,
DmtxRangeBad,
DmtxRangeEnd
} DmtxRange;
typedef enum {
DmtxEdgeTop = 0x01 << 0,
DmtxEdgeBottom = 0x01 << 1,
DmtxEdgeLeft = 0x01 << 2,
DmtxEdgeRight = 0x01 << 3
} DmtxEdge;
typedef enum {
DmtxMaskBit8 = 0x01 << 0,
DmtxMaskBit7 = 0x01 << 1,
DmtxMaskBit6 = 0x01 << 2,
DmtxMaskBit5 = 0x01 << 3,
DmtxMaskBit4 = 0x01 << 4,
DmtxMaskBit3 = 0x01 << 5,
DmtxMaskBit2 = 0x01 << 6,
DmtxMaskBit1 = 0x01 << 7
} DmtxMaskBit;
/**
* @struct DmtxFollow
* @brief DmtxFollow
*/
typedef struct DmtxFollow_struct {
unsigned char *ptr;
unsigned char neighbor;
int step;
DmtxPixelLoc loc;
} DmtxFollow;
/**
* @struct DmtxBresLine
* @brief DmtxBresLine
*/
typedef struct DmtxBresLine_struct {
int xStep;
int yStep;
int xDelta;
int yDelta;
int steep;
int xOut;
int yOut;
int travel;
int outward;
int error;
DmtxPixelLoc loc;
DmtxPixelLoc loc0;
DmtxPixelLoc loc1;
} DmtxBresLine;
typedef struct C40TextState_struct {
int shift;
DmtxBoolean upperShift;
} C40TextState;
/* dmtxregion.c */
static double RightAngleTrueness(DmtxVector2 c0, DmtxVector2 c1, DmtxVector2 c2, double angle);
static DmtxPointFlow MatrixRegionSeekEdge(DmtxDecode *dec, DmtxPixelLoc loc0);
static DmtxPassFail MatrixRegionOrientation(DmtxDecode *dec, DmtxRegion *reg, DmtxPointFlow flowBegin);
static long DistanceSquared(DmtxPixelLoc a, DmtxPixelLoc b);
static int ReadModuleColor(DmtxDecode *dec, DmtxRegion *reg, int symbolRow, int symbolCol, int sizeIdx, int colorPlane);
static DmtxPassFail MatrixRegionFindSize(DmtxDecode *dec, DmtxRegion *reg);
static int CountJumpTally(DmtxDecode *dec, DmtxRegion *reg, int xStart, int yStart, DmtxDirection dir);
static DmtxPointFlow GetPointFlow(DmtxDecode *dec, int colorPlane, DmtxPixelLoc loc, int arrive);
static DmtxPointFlow FindStrongestNeighbor(DmtxDecode *dec, DmtxPointFlow center, int sign);
static DmtxFollow FollowSeek(DmtxDecode *dec, DmtxRegion *reg, int seek);
static DmtxFollow FollowSeekLoc(DmtxDecode *dec, DmtxPixelLoc loc);
static DmtxFollow FollowStep(DmtxDecode *dec, DmtxRegion *reg, DmtxFollow followBeg, int sign);
static DmtxFollow FollowStep2(DmtxDecode *dec, DmtxFollow followBeg, int sign);
static DmtxPassFail TrailBlazeContinuous(DmtxDecode *dec, DmtxRegion *reg, DmtxPointFlow flowBegin, int maxDiagonal);
static int TrailBlazeGapped(DmtxDecode *dec, DmtxRegion *reg, DmtxBresLine line, int streamDir);
static int TrailClear(DmtxDecode *dec, DmtxRegion *reg, int clearMask);
static DmtxBestLine FindBestSolidLine(DmtxDecode *dec, DmtxRegion *reg, int step0, int step1, int streamDir, int houghAvoid);
static DmtxBestLine FindBestSolidLine2(DmtxDecode *dec, DmtxPixelLoc loc0, int tripSteps, int sign, int houghAvoid);
static DmtxPassFail FindTravelLimits(DmtxDecode *dec, DmtxRegion *reg, DmtxBestLine *line);
static DmtxPassFail MatrixRegionAlignCalibEdge(DmtxDecode *dec, DmtxRegion *reg, int whichEdge);
static DmtxBresLine BresLineInit(DmtxPixelLoc loc0, DmtxPixelLoc loc1, DmtxPixelLoc locInside);
static DmtxPassFail BresLineGetStep(DmtxBresLine line, DmtxPixelLoc target, int *travel, int *outward);
static DmtxPassFail BresLineStep(DmtxBresLine *line, int travel, int outward);
/*static void WriteDiagnosticImage(DmtxDecode *dec, DmtxRegion *reg, char *imagePath);*/
/* dmtxdecode.c */
static void TallyModuleJumps(DmtxDecode *dec, DmtxRegion *reg, int tally[][24], int xOrigin, int yOrigin, int mapWidth, int mapHeight, DmtxDirection dir);
static DmtxPassFail PopulateArrayFromMatrix(DmtxDecode *dec, DmtxRegion *reg, DmtxMessage *msg);
/* dmtxdecodescheme.c */
static void DecodeDataStream(DmtxMessage *msg, int sizeIdx, unsigned char *outputStart);
static int GetEncodationScheme(unsigned char cw);
static void PushOutputWord(DmtxMessage *msg, int value);
static void PushOutputC40TextWord(DmtxMessage *msg, C40TextState *state, int value);
static void PushOutputMacroHeader(DmtxMessage *msg, int macroType);
static void PushOutputMacroTrailer(DmtxMessage *msg);
static unsigned char *DecodeSchemeAscii(DmtxMessage *msg, unsigned char *ptr, unsigned char *dataEnd);
static unsigned char *DecodeSchemeC40Text(DmtxMessage *msg, unsigned char *ptr, unsigned char *dataEnd, DmtxScheme encScheme);
static unsigned char *DecodeSchemeX12(DmtxMessage *msg, unsigned char *ptr, unsigned char *dataEnd);
static unsigned char *DecodeSchemeEdifact(DmtxMessage *msg, unsigned char *ptr, unsigned char *dataEnd);
static unsigned char *DecodeSchemeBase256(DmtxMessage *msg, unsigned char *ptr, unsigned char *dataEnd);
/* dmtxencode.c */
static void PrintPattern(DmtxEncode *encode);
static int EncodeDataCodewords(DmtxByteList *input, DmtxByteList *output, int sizeIdxRequest, DmtxScheme scheme);
/* dmtxplacemod.c */
static int ModulePlacementEcc200(unsigned char *modules, unsigned char *codewords, int sizeIdx, int moduleOnColor);
static void PatternShapeStandard(unsigned char *modules, int mappingRows, int mappingCols, int row, int col, unsigned char *codeword, int moduleOnColor);
static void PatternShapeSpecial1(unsigned char *modules, int mappingRows, int mappingCols, unsigned char *codeword, int moduleOnColor);
static void PatternShapeSpecial2(unsigned char *modules, int mappingRows, int mappingCols, unsigned char *codeword, int moduleOnColor);
static void PatternShapeSpecial3(unsigned char *modules, int mappingRows, int mappingCols, unsigned char *codeword, int moduleOnColor);
static void PatternShapeSpecial4(unsigned char *modules, int mappingRows, int mappingCols, unsigned char *codeword, int moduleOnColor);
static void PlaceModule(unsigned char *modules, int mappingRows, int mappingCols, int row, int col,
unsigned char *codeword, int mask, int moduleOnColor);
/* dmtxreedsol.c */
static DmtxPassFail RsEncode(DmtxMessage *message, int sizeIdx);
static DmtxPassFail RsDecode(unsigned char *code, int sizeIdx, int fix);
static DmtxPassFail RsGenPoly(DmtxByteList *gen, int errorWordCount);
static DmtxBoolean RsComputeSyndromes(DmtxByteList *syn, const DmtxByteList *rec, int blockErrorWords);
static DmtxBoolean RsFindErrorLocatorPoly(DmtxByteList *elp, const DmtxByteList *syn, int errorWordCount, int maxCorrectable);
static DmtxBoolean RsFindErrorLocations(DmtxByteList *loc, const DmtxByteList *elp);
static DmtxPassFail RsRepairErrors(DmtxByteList *rec, const DmtxByteList *loc, const DmtxByteList *elp, const DmtxByteList *syn);
/* dmtxscangrid.c */
static DmtxScanGrid InitScanGrid(DmtxDecode *dec);
static int PopGridLocation(DmtxScanGrid *grid, /*@out@*/ DmtxPixelLoc *locPtr);
static int GetGridCoordinates(DmtxScanGrid *grid, /*@out@*/ DmtxPixelLoc *locPtr);
static void SetDerivedFields(DmtxScanGrid *grid);
/* dmtxsymbol.c */
static int FindSymbolSize(int dataWords, int sizeIdxRequest);
/* dmtximage.c */
static int GetBitsPerPixel(int pack);
/* dmtxencodestream.c */
static DmtxEncodeStream StreamInit(DmtxByteList *input, DmtxByteList *output);
static void StreamCopy(DmtxEncodeStream *dst, DmtxEncodeStream *src);
static void StreamMarkComplete(DmtxEncodeStream *stream, int sizeIdx);
static void StreamMarkInvalid(DmtxEncodeStream *stream, int reasonIdx);
static void StreamMarkFatal(DmtxEncodeStream *stream, int reasonIdx);
static void StreamOutputChainAppend(DmtxEncodeStream *stream, DmtxByte value);
static DmtxByte StreamOutputChainRemoveLast(DmtxEncodeStream *stream);
static void StreamOutputSet(DmtxEncodeStream *stream, int index, DmtxByte value);
static DmtxBoolean StreamInputHasNext(DmtxEncodeStream *stream);
static DmtxByte StreamInputPeekNext(DmtxEncodeStream *stream);
static DmtxByte StreamInputAdvanceNext(DmtxEncodeStream *stream);
static void StreamInputAdvancePrev(DmtxEncodeStream *stream);
/* dmtxencodescheme.c */
static int EncodeSingleScheme(DmtxByteList *input, DmtxByteList *output, int sizeIdxRequest, DmtxScheme scheme);
static void EncodeNextChunk(DmtxEncodeStream *stream, int scheme, int subScheme, int sizeIdxRequest);
static void EncodeChangeScheme(DmtxEncodeStream *stream, DmtxScheme targetScheme, int unlatchType);
static int GetRemainingSymbolCapacity(int outputLength, int sizeIdx);
/* dmtxencodeoptimize.c */
static int EncodeOptimizeBest(DmtxByteList *input, DmtxByteList *output, int sizeIdxRequest);
static void StreamAdvanceFromBest(DmtxEncodeStream *streamNext,
DmtxEncodeStream *streamList, int targeteState, int sizeIdxRequest);
static void AdvanceAsciiCompact(DmtxEncodeStream *streamNext, DmtxEncodeStream *streamList,
int state, int inputNext, int sizeIdxRequest);
static void AdvanceCTX(DmtxEncodeStream *streamNext, DmtxEncodeStream *streamList,
int state, int inputNext, int ctxValueCount, int sizeIdxRequest);
static void AdvanceEdifact(DmtxEncodeStream *streamNext, DmtxEncodeStream *streamList,
int state, int inputNext, int sizeIdxRequest);
static int GetScheme(int state);
static DmtxBoolean ValidStateSwitch(int fromState, int targetState);
/* dmtxencodeascii.c */
static void EncodeNextChunkAscii(DmtxEncodeStream *stream, int option);
static void AppendValueAscii(DmtxEncodeStream *stream, DmtxByte value);
static void CompleteIfDoneAscii(DmtxEncodeStream *stream, int sizeIdxRequest);
static void PadRemainingInAscii(DmtxEncodeStream *stream, int sizeIdx);
static DmtxByteList EncodeTmpRemainingInAscii(DmtxEncodeStream *stream, DmtxByte *storage, int capacity, DmtxPassFail *passFail);
static DmtxByte Randomize253State(DmtxByte cwValue, int cwPosition);
/* dmtxencodec40textx12.c */
static void EncodeNextChunkCTX(DmtxEncodeStream *stream, int sizeIdxRequest);
static void AppendValuesCTX(DmtxEncodeStream *stream, DmtxByteList *valueList);
static void AppendUnlatchCTX(DmtxEncodeStream *stream);
static void CompleteIfDoneCTX(DmtxEncodeStream *stream, int sizeIdxRequest);
static void CompletePartialC40Text(DmtxEncodeStream *stream, DmtxByteList *valueList, int sizeIdxRequest);
static void CompletePartialX12(DmtxEncodeStream *stream, DmtxByteList *valueList, int sizeIdxRequest);
static DmtxBoolean PartialX12ChunkRemains(DmtxEncodeStream *stream);
static void PushCTXValues(DmtxByteList *valueList, DmtxByte inputValue, int targetScheme, DmtxPassFail *passFail);
static DmtxBoolean IsCTX(int scheme);
static void ShiftValueListBy3(DmtxByteList *list, DmtxPassFail *passFail);
/* dmtxencodeedifact.c */
static void EncodeNextChunkEdifact(DmtxEncodeStream *stream);
static void AppendValueEdifact(DmtxEncodeStream *stream, DmtxByte value);
static void CompleteIfDoneEdifact(DmtxEncodeStream *stream, int sizeIdxRequest);
/* dmtxencodebase256.c */
static void EncodeNextChunkBase256(DmtxEncodeStream *stream);
static void AppendValueBase256(DmtxEncodeStream *stream, DmtxByte value);
static void CompleteIfDoneBase256(DmtxEncodeStream *stream, int sizeIdxRequest);
static void UpdateBase256ChainHeader(DmtxEncodeStream *stream, int perfectSizeIdx);
static void Base256OutputChainInsertFirst(DmtxEncodeStream *stream);
static void Base256OutputChainRemoveFirst(DmtxEncodeStream *stream);
static DmtxByte Randomize255State(DmtxByte cwValue, int cwPosition);
static unsigned char UnRandomize255State(unsigned char value, int idx);
static const int dmtxNeighborNone = 8;
static const int dmtxPatternX[] = { -1, 0, 1, 1, 1, 0, -1, -1 };
static const int dmtxPatternY[] = { -1, -1, -1, 0, 1, 1, 1, 0 };
static const DmtxPointFlow dmtxBlankEdge = { 0, 0, 0, DmtxUndefined, { -1, -1 } };
/*@ +charint @*/
static int rHvX[] =
{ 256, 256, 256, 256, 255, 255, 255, 254, 254, 253, 252, 251, 250, 249, 248,
247, 246, 245, 243, 242, 241, 239, 237, 236, 234, 232, 230, 228, 226, 224,
222, 219, 217, 215, 212, 210, 207, 204, 202, 199, 196, 193, 190, 187, 184,
181, 178, 175, 171, 168, 165, 161, 158, 154, 150, 147, 143, 139, 136, 132,
128, 124, 120, 116, 112, 108, 104, 100, 96, 92, 88, 83, 79, 75, 71,
66, 62, 58, 53, 49, 44, 40, 36, 31, 27, 22, 18, 13, 9, 4,
0, -4, -9, -13, -18, -22, -27, -31, -36, -40, -44, -49, -53, -58, -62,
-66, -71, -75, -79, -83, -88, -92, -96, -100, -104, -108, -112, -116, -120, -124,
-128, -132, -136, -139, -143, -147, -150, -154, -158, -161, -165, -168, -171, -175, -178,
-181, -184, -187, -190, -193, -196, -199, -202, -204, -207, -210, -212, -215, -217, -219,
-222, -224, -226, -228, -230, -232, -234, -236, -237, -239, -241, -242, -243, -245, -246,
-247, -248, -249, -250, -251, -252, -253, -254, -254, -255, -255, -255, -256, -256, -256 };
static int rHvY[] =
{ 0, 4, 9, 13, 18, 22, 27, 31, 36, 40, 44, 49, 53, 58, 62,
66, 71, 75, 79, 83, 88, 92, 96, 100, 104, 108, 112, 116, 120, 124,
128, 132, 136, 139, 143, 147, 150, 154, 158, 161, 165, 168, 171, 175, 178,
181, 184, 187, 190, 193, 196, 199, 202, 204, 207, 210, 212, 215, 217, 219,
222, 224, 226, 228, 230, 232, 234, 236, 237, 239, 241, 242, 243, 245, 246,
247, 248, 249, 250, 251, 252, 253, 254, 254, 255, 255, 255, 256, 256, 256,
256, 256, 256, 256, 255, 255, 255, 254, 254, 253, 252, 251, 250, 249, 248,
247, 246, 245, 243, 242, 241, 239, 237, 236, 234, 232, 230, 228, 226, 224,
222, 219, 217, 215, 212, 210, 207, 204, 202, 199, 196, 193, 190, 187, 184,
181, 178, 175, 171, 168, 165, 161, 158, 154, 150, 147, 143, 139, 136, 132,
128, 124, 120, 116, 112, 108, 104, 100, 96, 92, 88, 83, 79, 75, 71,
66, 62, 58, 53, 49, 44, 40, 36, 31, 27, 22, 18, 13, 9, 4 };
/*@ -charint @*/
enum DmtxErrorMessage {
DmtxErrorUnknown,
DmtxErrorUnsupportedCharacter,
DmtxErrorNotOnByteBoundary,
DmtxErrorIllegalParameterValue,
DmtxErrorEmptyList,
DmtxErrorOutOfBounds,
DmtxErrorMessageTooLarge,
DmtxErrorCantCompactNonDigits,
DmtxErrorUnexpectedScheme,
DmtxErrorIncompleteValueList
};
static char *dmtxErrorMessage[] = {
"Unknown error",
"Unsupported character",
"Not on byte boundary",
"Illegal parameter value",
"Encountered empty list",
"Out of bounds",
"Message too large",
"Can't compact non-digits",
"Encountered unexpected scheme",
"Encountered incomplete value list"
};
#endif