/usr/include/dmtx.h is in libdmtx-dev 0.7.4-2.
This file is owned by root:root, with mode 0o644.
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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 dmtx.h
* \brief Main libdmtx header
*/
#ifndef __DMTX_H__
#define __DMTX_H__
#ifdef __cplusplus
extern "C" {
#endif
/* Time headers required for DmtxTime struct below */
#include <time.h>
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
#ifndef M_PI
#define M_PI 3.14159265358979323846
#endif
#ifndef M_PI_2
#define M_PI_2 1.57079632679489661923
#endif
#define DmtxVersion "0.7.4"
#define DmtxUndefined -1
#define DmtxPassFail unsigned int
#define DmtxPass 1
#define DmtxFail 0
#define DmtxBoolean unsigned int
#define DmtxTrue 1
#define DmtxFalse 0
#define DmtxFormatMatrix 0
#define DmtxFormatMosaic 1
#define DmtxSymbolSquareCount 24
#define DmtxSymbolRectCount 6
#define DmtxModuleOff 0x00
#define DmtxModuleOnRed 0x01
#define DmtxModuleOnGreen 0x02
#define DmtxModuleOnBlue 0x04
#define DmtxModuleOnRGB 0x07 /* OnRed | OnGreen | OnBlue */
#define DmtxModuleOn 0x07
#define DmtxModuleUnsure 0x08
#define DmtxModuleAssigned 0x10
#define DmtxModuleVisited 0x20
#define DmtxModuleData 0x40
#define DMTX_CHECK_BOUNDS(l,i) (assert((i) >= 0 && (i) < (l)->length && (l)->length <= (l)->capacity))
typedef enum {
DmtxStatusEncoding, /* Encoding is currently underway */
DmtxStatusComplete, /* Encoding is done and everything went well */
DmtxStatusInvalid, /* Something bad happened that sometimes happens */
DmtxStatusFatal /* Something happened that should never happen */
} DmtxStatus;
typedef enum {
DmtxSchemeAutoFast = -2,
DmtxSchemeAutoBest = -1,
DmtxSchemeAscii = 0,
DmtxSchemeC40,
DmtxSchemeText,
DmtxSchemeX12,
DmtxSchemeEdifact,
DmtxSchemeBase256
} DmtxScheme;
typedef enum {
DmtxSymbolRectAuto = -3,
DmtxSymbolSquareAuto = -2,
DmtxSymbolShapeAuto = -1,
DmtxSymbol10x10 = 0,
DmtxSymbol12x12,
DmtxSymbol14x14,
DmtxSymbol16x16,
DmtxSymbol18x18,
DmtxSymbol20x20,
DmtxSymbol22x22,
DmtxSymbol24x24,
DmtxSymbol26x26,
DmtxSymbol32x32,
DmtxSymbol36x36,
DmtxSymbol40x40,
DmtxSymbol44x44,
DmtxSymbol48x48,
DmtxSymbol52x52,
DmtxSymbol64x64,
DmtxSymbol72x72,
DmtxSymbol80x80,
DmtxSymbol88x88,
DmtxSymbol96x96,
DmtxSymbol104x104,
DmtxSymbol120x120,
DmtxSymbol132x132,
DmtxSymbol144x144,
DmtxSymbol8x18,
DmtxSymbol8x32,
DmtxSymbol12x26,
DmtxSymbol12x36,
DmtxSymbol16x36,
DmtxSymbol16x48
} DmtxSymbolSize;
typedef enum {
DmtxDirNone = 0x00,
DmtxDirUp = 0x01 << 0,
DmtxDirLeft = 0x01 << 1,
DmtxDirDown = 0x01 << 2,
DmtxDirRight = 0x01 << 3,
DmtxDirHorizontal = DmtxDirLeft | DmtxDirRight,
DmtxDirVertical = DmtxDirUp | DmtxDirDown,
DmtxDirRightUp = DmtxDirRight | DmtxDirUp,
DmtxDirLeftDown = DmtxDirLeft | DmtxDirDown
} DmtxDirection;
typedef enum {
DmtxSymAttribSymbolRows,
DmtxSymAttribSymbolCols,
DmtxSymAttribDataRegionRows,
DmtxSymAttribDataRegionCols,
DmtxSymAttribHorizDataRegions,
DmtxSymAttribVertDataRegions,
DmtxSymAttribMappingMatrixRows,
DmtxSymAttribMappingMatrixCols,
DmtxSymAttribInterleavedBlocks,
DmtxSymAttribBlockErrorWords,
DmtxSymAttribBlockMaxCorrectable,
DmtxSymAttribSymbolDataWords,
DmtxSymAttribSymbolErrorWords,
DmtxSymAttribSymbolMaxCorrectable
} DmtxSymAttribute;
typedef enum {
DmtxCorner00 = 0x01 << 0,
DmtxCorner10 = 0x01 << 1,
DmtxCorner11 = 0x01 << 2,
DmtxCorner01 = 0x01 << 3
} DmtxCornerLoc;
typedef enum {
/* Encoding properties */
DmtxPropScheme = 100,
DmtxPropSizeRequest,
DmtxPropMarginSize,
DmtxPropModuleSize,
/* Decoding properties */
DmtxPropEdgeMin = 200,
DmtxPropEdgeMax,
DmtxPropScanGap,
DmtxPropSquareDevn,
DmtxPropSymbolSize,
DmtxPropEdgeThresh,
/* Image properties */
DmtxPropWidth = 300,
DmtxPropHeight,
DmtxPropPixelPacking,
DmtxPropBitsPerPixel,
DmtxPropBytesPerPixel,
DmtxPropRowPadBytes,
DmtxPropRowSizeBytes,
DmtxPropImageFlip,
DmtxPropChannelCount,
/* Image modifiers */
DmtxPropXmin = 400,
DmtxPropXmax,
DmtxPropYmin,
DmtxPropYmax,
DmtxPropScale
} DmtxProperty;
typedef enum {
/* Custom format */
DmtxPackCustom = 100,
/* 1 bpp */
DmtxPack1bppK = 200,
/* 8 bpp grayscale */
DmtxPack8bppK = 300,
/* 16 bpp formats */
DmtxPack16bppRGB = 400,
DmtxPack16bppRGBX,
DmtxPack16bppXRGB,
DmtxPack16bppBGR,
DmtxPack16bppBGRX,
DmtxPack16bppXBGR,
DmtxPack16bppYCbCr,
/* 24 bpp formats */
DmtxPack24bppRGB = 500,
DmtxPack24bppBGR,
DmtxPack24bppYCbCr,
/* 32 bpp formats */
DmtxPack32bppRGBX = 600,
DmtxPack32bppXRGB,
DmtxPack32bppBGRX,
DmtxPack32bppXBGR,
DmtxPack32bppCMYK
} DmtxPackOrder;
typedef enum {
DmtxFlipNone = 0x00,
DmtxFlipX = 0x01 << 0,
DmtxFlipY = 0x01 << 1
} DmtxFlip;
typedef double DmtxMatrix3[3][3];
/**
* @struct DmtxPixelLoc
* @brief DmtxPixelLoc
*/
typedef struct DmtxPixelLoc_struct {
int X;
int Y;
} DmtxPixelLoc;
/**
* @struct DmtxVector2
* @brief DmtxVector2
*/
typedef struct DmtxVector2_struct {
double X;
double Y;
} DmtxVector2;
/**
* @struct DmtxRay2
* @brief DmtxRay2
*/
typedef struct DmtxRay2_struct {
double tMin;
double tMax;
DmtxVector2 p;
DmtxVector2 v;
} DmtxRay2;
typedef unsigned char DmtxByte;
/**
* @struct DmtxByteList
* @brief DmtxByteList
* Use signed int for length fields instead of size_t to play nicely with RS
* arithmetic
*/
typedef struct DmtxByteList_struct DmtxByteList;
struct DmtxByteList_struct
{
int length;
int capacity;
DmtxByte *b;
};
typedef struct DmtxEncodeStream_struct DmtxEncodeStream;
struct DmtxEncodeStream_struct
{
int currentScheme; /* Current encodation scheme */
int inputNext; /* Index of next unprocessed input word in queue */
int outputChainValueCount; /* Count of output values pushed within current scheme chain */
int outputChainWordCount; /* Count of output words pushed within current scheme chain */
char *reason; /* Reason for status */
int sizeIdx; /* Symbol size of completed stream */
DmtxStatus status;
DmtxByteList *input;
DmtxByteList *output;
};
/**
* @struct DmtxImage
* @brief DmtxImage
*/
typedef struct DmtxImage_struct {
int width;
int height;
int pixelPacking;
int bitsPerPixel;
int bytesPerPixel;
int rowPadBytes;
int rowSizeBytes;
int imageFlip;
int channelCount;
int channelStart[4];
int bitsPerChannel[4];
unsigned char *pxl;
} DmtxImage;
/**
* @struct DmtxPointFlow
* @brief DmtxPointFlow
*/
typedef struct DmtxPointFlow_struct {
int plane;
int arrive;
int depart;
int mag;
DmtxPixelLoc loc;
} DmtxPointFlow;
/**
* @struct DmtxBestLine
* @brief DmtxBestLine
*/
typedef struct DmtxBestLine_struct {
int angle;
int hOffset;
int mag;
int stepBeg;
int stepPos;
int stepNeg;
int distSq;
double devn;
DmtxPixelLoc locBeg;
DmtxPixelLoc locPos;
DmtxPixelLoc locNeg;
} DmtxBestLine;
/**
* @struct DmtxRegion
* @brief DmtxRegion
*/
typedef struct DmtxRegion_struct {
/* Trail blazing values */
int jumpToPos; /* */
int jumpToNeg; /* */
int stepsTotal; /* */
DmtxPixelLoc finalPos; /* */
DmtxPixelLoc finalNeg; /* */
DmtxPixelLoc boundMin; /* */
DmtxPixelLoc boundMax; /* */
DmtxPointFlow flowBegin; /* */
/* Orientation values */
int polarity; /* */
int stepR;
int stepT;
DmtxPixelLoc locR; /* remove if stepR works above */
DmtxPixelLoc locT; /* remove if stepT works above */
/* Region fitting values */
int leftKnown; /* known == 1; unknown == 0 */
int leftAngle; /* hough angle of left edge */
DmtxPixelLoc leftLoc; /* known (arbitrary) location on left edge */
DmtxBestLine leftLine; /* */
int bottomKnown; /* known == 1; unknown == 0 */
int bottomAngle; /* hough angle of bottom edge */
DmtxPixelLoc bottomLoc; /* known (arbitrary) location on bottom edge */
DmtxBestLine bottomLine; /* */
int topKnown; /* known == 1; unknown == 0 */
int topAngle; /* hough angle of top edge */
DmtxPixelLoc topLoc; /* known (arbitrary) location on top edge */
int rightKnown; /* known == 1; unknown == 0 */
int rightAngle; /* hough angle of right edge */
DmtxPixelLoc rightLoc; /* known (arbitrary) location on right edge */
/* Region calibration values */
int onColor; /* */
int offColor; /* */
int sizeIdx; /* Index of arrays that store Data Matrix constants */
int symbolRows; /* Number of total rows in symbol including alignment patterns */
int symbolCols; /* Number of total columns in symbol including alignment patterns */
int mappingRows; /* Number of data rows in symbol */
int mappingCols; /* Number of data columns in symbol */
/* Transform values */
DmtxMatrix3 raw2fit; /* 3x3 transformation from raw image to fitted barcode grid */
DmtxMatrix3 fit2raw; /* 3x3 transformation from fitted barcode grid to raw image */
} DmtxRegion;
/**
* @struct DmtxMessage
* @brief DmtxMessage
*/
typedef struct DmtxMessage_struct {
size_t arraySize; /* mappingRows * mappingCols */
size_t codeSize; /* Size of encoded data (data words + error words) */
size_t outputSize; /* Size of buffer used to hold decoded data */
int outputIdx; /* Internal index used to store output progress */
int padCount;
unsigned char *array; /* Pointer to internal representation of Data Matrix modules */
unsigned char *code; /* Pointer to internal storage of code words (data and error) */
unsigned char *output; /* Pointer to internal storage of decoded output */
} DmtxMessage;
/**
* @struct DmtxScanGrid
* @brief DmtxScanGrid
*/
typedef struct DmtxScanGrid_struct {
/* set once */
int minExtent; /* Smallest cross size used in scan */
int maxExtent; /* Size of bounding grid region (2^N - 1) */
int xOffset; /* Offset to obtain image X coordinate */
int yOffset; /* Offset to obtain image Y coordinate */
int xMin; /* Minimum X in image coordinate system */
int xMax; /* Maximum X in image coordinate system */
int yMin; /* Minimum Y in image coordinate system */
int yMax; /* Maximum Y in image coordinate system */
/* reset for each level */
int total; /* Total number of crosses at this size */
int extent; /* Length/width of cross in pixels */
int jumpSize; /* Distance in pixels between cross centers */
int pixelTotal; /* Total pixel count within an individual cross path */
int startPos; /* X and Y coordinate of first cross center in pattern */
/* reset for each cross */
int pixelCount; /* Progress (pixel count) within current cross pattern */
int xCenter; /* X center of current cross pattern */
int yCenter; /* Y center of current cross pattern */
} DmtxScanGrid;
/**
* @struct DmtxTime
* @brief DmtxTime
*/
typedef struct DmtxTime_struct {
time_t sec;
unsigned long usec;
} DmtxTime;
/**
* @struct DmtxDecode
* @brief DmtxDecode
*/
typedef struct DmtxDecode_struct {
/* Options */
int edgeMin;
int edgeMax;
int scanGap;
double squareDevn;
int sizeIdxExpected;
int edgeThresh;
/* Image modifiers */
int xMin;
int xMax;
int yMin;
int yMax;
int scale;
/* Internals */
/* int cacheComplete; */
unsigned char *cache;
DmtxImage *image;
DmtxScanGrid grid;
} DmtxDecode;
/**
* @struct DmtxEncode
* @brief DmtxEncode
*/
typedef struct DmtxEncode_struct {
int method;
int scheme;
int sizeIdxRequest;
int marginSize;
int moduleSize;
int pixelPacking;
int imageFlip;
int rowPadBytes;
DmtxMessage *message;
DmtxImage *image;
DmtxRegion region;
DmtxMatrix3 xfrm; /* XXX still necessary? */
DmtxMatrix3 rxfrm; /* XXX still necessary? */
} DmtxEncode;
/**
* @struct DmtxChannel
* @brief DmtxChannel
*/
typedef struct DmtxChannel_struct {
int encScheme; /* current encodation scheme */
int invalid; /* channel status (invalid if non-zero) */
unsigned char *inputPtr; /* pointer to current input character */
unsigned char *inputStop; /* pointer to position after final input character */
int encodedLength; /* encoded length (units of 2/3 bits) */
int currentLength; /* current length (units of 2/3 bits) */
int firstCodeWord; /* */
unsigned char encodedWords[1558];
} DmtxChannel;
/* Wrap in a struct for fast copies */
/**
* @struct DmtxChannelGroup
* @brief DmtxChannelGroup
*/
typedef struct DmtxChannelGroup_struct {
DmtxChannel channel[6];
} DmtxChannelGroup;
/**
* @struct DmtxTriplet
* @brief DmtxTriplet
*/
typedef struct DmtxTriplet_struct {
unsigned char value[3];
} DmtxTriplet;
/**
* @struct DmtxQuadruplet
* @brief DmtxQuadruplet
*/
typedef struct DmtxQuadruplet_struct {
unsigned char value[4];
} DmtxQuadruplet;
/* dmtxtime.c */
extern DmtxTime dmtxTimeNow(void);
extern DmtxTime dmtxTimeAdd(DmtxTime t, long msec);
extern int dmtxTimeExceeded(DmtxTime timeout);
/* dmtxencode.c */
extern DmtxEncode *dmtxEncodeCreate(void);
extern DmtxPassFail dmtxEncodeDestroy(DmtxEncode **enc);
extern DmtxPassFail dmtxEncodeSetProp(DmtxEncode *enc, int prop, int value);
extern int dmtxEncodeGetProp(DmtxEncode *enc, int prop);
extern DmtxPassFail dmtxEncodeDataMatrix(DmtxEncode *enc, int n, unsigned char *s);
extern DmtxPassFail dmtxEncodeDataMosaic(DmtxEncode *enc, int n, unsigned char *s);
/* dmtxdecode.c */
extern DmtxDecode *dmtxDecodeCreate(DmtxImage *img, int scale);
extern DmtxPassFail dmtxDecodeDestroy(DmtxDecode **dec);
extern DmtxPassFail dmtxDecodeSetProp(DmtxDecode *dec, int prop, int value);
extern int dmtxDecodeGetProp(DmtxDecode *dec, int prop);
extern /*@exposed@*/ unsigned char *dmtxDecodeGetCache(DmtxDecode *dec, int x, int y);
extern DmtxPassFail dmtxDecodeGetPixelValue(DmtxDecode *dec, int x, int y, int channel, /*@out@*/ int *value);
extern DmtxMessage *dmtxDecodeMatrixRegion(DmtxDecode *dec, DmtxRegion *reg, int fix);
extern DmtxMessage *dmtxDecodeMosaicRegion(DmtxDecode *dec, DmtxRegion *reg, int fix);
extern unsigned char *dmtxDecodeCreateDiagnostic(DmtxDecode *dec, /*@out@*/ int *totalBytes, /*@out@*/ int *headerBytes, int style);
/* dmtxregion.c */
extern DmtxRegion *dmtxRegionCreate(DmtxRegion *reg);
extern DmtxPassFail dmtxRegionDestroy(DmtxRegion **reg);
extern DmtxRegion *dmtxRegionFindNext(DmtxDecode *dec, DmtxTime *timeout);
extern DmtxRegion *dmtxRegionScanPixel(DmtxDecode *dec, int x, int y);
extern DmtxPassFail dmtxRegionUpdateCorners(DmtxDecode *dec, DmtxRegion *reg, DmtxVector2 p00,
DmtxVector2 p10, DmtxVector2 p11, DmtxVector2 p01);
extern DmtxPassFail dmtxRegionUpdateXfrms(DmtxDecode *dec, DmtxRegion *reg);
/* dmtxmessage.c */
extern DmtxMessage *dmtxMessageCreate(int sizeIdx, int symbolFormat);
extern DmtxPassFail dmtxMessageDestroy(DmtxMessage **msg);
/* dmtximage.c */
extern DmtxImage *dmtxImageCreate(unsigned char *pxl, int width, int height, int pack);
extern DmtxPassFail dmtxImageDestroy(DmtxImage **img);
extern DmtxPassFail dmtxImageSetChannel(DmtxImage *img, int channelStart, int bitsPerChannel);
extern DmtxPassFail dmtxImageSetProp(DmtxImage *img, int prop, int value);
extern int dmtxImageGetProp(DmtxImage *img, int prop);
extern int dmtxImageGetByteOffset(DmtxImage *img, int x, int y);
extern DmtxPassFail dmtxImageGetPixelValue(DmtxImage *img, int x, int y, int channel, /*@out@*/ int *value);
extern DmtxPassFail dmtxImageSetPixelValue(DmtxImage *img, int x, int y, int channel, int value);
extern DmtxBoolean dmtxImageContainsInt(DmtxImage *img, int margin, int x, int y);
extern DmtxBoolean dmtxImageContainsFloat(DmtxImage *img, double x, double y);
/* dmtxvector2.c */
extern DmtxVector2 *dmtxVector2AddTo(DmtxVector2 *v1, const DmtxVector2 *v2);
extern DmtxVector2 *dmtxVector2Add(/*@out@*/ DmtxVector2 *vOut, const DmtxVector2 *v1, const DmtxVector2 *v2);
extern DmtxVector2 *dmtxVector2SubFrom(DmtxVector2 *v1, const DmtxVector2 *v2);
extern DmtxVector2 *dmtxVector2Sub(/*@out@*/ DmtxVector2 *vOut, const DmtxVector2 *v1, const DmtxVector2 *v2);
extern DmtxVector2 *dmtxVector2ScaleBy(DmtxVector2 *v, double s);
extern DmtxVector2 *dmtxVector2Scale(/*@out@*/ DmtxVector2 *vOut, const DmtxVector2 *v, double s);
extern double dmtxVector2Cross(const DmtxVector2 *v1, const DmtxVector2 *v2);
extern double dmtxVector2Norm(DmtxVector2 *v);
extern double dmtxVector2Dot(const DmtxVector2 *v1, const DmtxVector2 *v2);
extern double dmtxVector2Mag(const DmtxVector2 *v);
extern double dmtxDistanceFromRay2(const DmtxRay2 *r, const DmtxVector2 *q);
extern double dmtxDistanceAlongRay2(const DmtxRay2 *r, const DmtxVector2 *q);
extern DmtxPassFail dmtxRay2Intersect(/*@out@*/ DmtxVector2 *point, const DmtxRay2 *p0, const DmtxRay2 *p1);
extern DmtxPassFail dmtxPointAlongRay2(/*@out@*/ DmtxVector2 *point, const DmtxRay2 *r, double t);
/* dmtxmatrix3.c */
extern void dmtxMatrix3Copy(/*@out@*/ DmtxMatrix3 m0, DmtxMatrix3 m1);
extern void dmtxMatrix3Identity(/*@out@*/ DmtxMatrix3 m);
extern void dmtxMatrix3Translate(/*@out@*/ DmtxMatrix3 m, double tx, double ty);
extern void dmtxMatrix3Rotate(/*@out@*/ DmtxMatrix3 m, double angle);
extern void dmtxMatrix3Scale(/*@out@*/ DmtxMatrix3 m, double sx, double sy);
extern void dmtxMatrix3Shear(/*@out@*/ DmtxMatrix3 m, double shx, double shy);
extern void dmtxMatrix3LineSkewTop(/*@out@*/ DmtxMatrix3 m, double b0, double b1, double sz);
extern void dmtxMatrix3LineSkewTopInv(/*@out@*/ DmtxMatrix3 m, double b0, double b1, double sz);
extern void dmtxMatrix3LineSkewSide(/*@out@*/ DmtxMatrix3 m, double b0, double b1, double sz);
extern void dmtxMatrix3LineSkewSideInv(/*@out@*/ DmtxMatrix3 m, double b0, double b1, double sz);
extern void dmtxMatrix3Multiply(/*@out@*/ DmtxMatrix3 mOut, DmtxMatrix3 m0, DmtxMatrix3 m1);
extern void dmtxMatrix3MultiplyBy(DmtxMatrix3 m0, DmtxMatrix3 m1);
extern int dmtxMatrix3VMultiply(/*@out@*/ DmtxVector2 *vOut, DmtxVector2 *vIn, DmtxMatrix3 m);
extern int dmtxMatrix3VMultiplyBy(DmtxVector2 *v, DmtxMatrix3 m);
extern void dmtxMatrix3Print(DmtxMatrix3 m);
/* dmtxsymbol.c */
extern int dmtxSymbolModuleStatus(DmtxMessage *mapping, int sizeIdx, int row, int col);
extern int dmtxGetSymbolAttribute(int attribute, int sizeIdx);
extern int dmtxGetBlockDataSize(int sizeIdx, int blockIdx);
/* dmtxbytelist.c */
extern DmtxByteList dmtxByteListBuild(DmtxByte *storage, int capacity);
extern void dmtxByteListInit(DmtxByteList *list, int length, DmtxByte value, DmtxPassFail *passFail);
extern void dmtxByteListClear(DmtxByteList *list);
extern DmtxBoolean dmtxByteListHasCapacity(DmtxByteList *list);
extern void dmtxByteListCopy(DmtxByteList *dst, const DmtxByteList *src, DmtxPassFail *passFail);
extern void dmtxByteListPush(DmtxByteList *list, DmtxByte value, DmtxPassFail *passFail);
extern DmtxByte dmtxByteListPop(DmtxByteList *list, DmtxPassFail *passFail);
extern void dmtxByteListPrint(DmtxByteList *list, char *prefix);
extern char *dmtxVersion(void);
#ifdef __cplusplus
}
#endif
#endif
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