Classes
class	CAppStruct
	CAppStruct – Application Structure (APS) container class. More...

struct	CGMI_DS
	decoder data stream structure More...

struct	CGMI_FMTBL
	decoder format table structure

struct	VDC_PRECISIONS

class	CCgmIn
	CCgmIn – CGM Input class. More...

class	CgmInfo
	CgmInfo – get CGM information. More...

class	CCgmBaseObj
	CCgmBaseObj – graphical element container base class. More...

class	CCgmRect
	CCgmRect – Rectangle element container class. More...

class	CCgmText
	CCgmText – Text and RestrictedText elements container class. More...

class	CCgmPoly
	CCgmPoly – Poly elements container class(Polyline, PolyBezier, Polygon, Disjoint Polyline) More...

class	CCgmCellArray
	CCgmCellArray – CellArray element container class. More...

class	CCgmTileArray
	CCgmTileArray – TileArray element container class. More...

class	CCgmFigure
	CCgmFigure – Figure and Compund Line element container class. More...

class	CCgmTrace
	CCgmTrace – Trace GDP element container class. More...

class	CCgmCircle
	CCgmCircle – Circle and CircularArc elements container class. More...

class	CCgmEllipse
	CCgmEllipse – Ellipse and EllipticalArc elements container class. More...

class	CCgmHyperbolicArc
	CCgmHyperbolicArc – HyperbolicArc element container class. More...

class	CCgmParabolicArc
	CCgmParabolicArc – ParabolicArc element container class. More...

class	CCgmNurb
	CCgmNurb – Non-Uniform B-Spline & Rational B-Spline(Nurbs) element container class. More...

class	CCgmArrow
	CCgmArrow – Arrow element container class, note- not a standard ISO CGM element. More...

class	CCgmCallout
	CCgmCallout – Callout element container class, note- not a standard ISO CGM element. More...

class	CCgmCopySegment
	CCgmCopySegment – CopySegment element container class. More...

class	CCgmGdp
	CCgmGdp – generalized drawing primitive element container class. More...

class	CCgmPolySymbol
	CCgmPolySymbol – PolySymbol element container class. More...

class	CCgmMessage
	CCgmMessage – message or application data primitive element container class. More...

class	ClassCallback

struct	CgmInError
	encountered while in picture open state More...

class	ElementCallback
	define an interface class for CgmIn element callback More...

class	CCgmObjects
	CCgmObjects – CGM Picture container. More...

class	ClippingPath
	ClippingPath – ClippingPath data container class. More...

class	ClipRectangle
	ClipRectangle – Clipping rectangle data container class. More...

class	CClipping
	CClipping – contsruct and maintain ClippingPath data. More...

class	CDrawBase
	CDrawBase – drawing base class from which all output specific draw classes are derived. More...

class	CDrawGDI
	CDrawGDI – GDI drawing class. More...

class	CDrawGL
	CDrawGL – OpenGL drawing class. More...

class	CDrawSVG
	CDrawSVG – SVG drawing class. More...

class	PicElement
	PicElement – Picture element list container, each list element will be pointer to a Graphical Element or an Application Structure but not both. More...

class	CElementList
	CElementList – Picture elements list. More...

class	CFigure
	CFigure – Figure data class. More...

class	CLSTFont
	CLSTFont – Font object class, one per facename used in a CGM picture. More...

class	MapEntry
	FontCache map entry. More...

class	CFontCache
	CFontCache – generates and maintains font cache. More...

class	CFontCacheEntry
	CFontCacheEntry – defines the data in a font cache entry. More...

class	CFontDesignGroup
	CFontDesignGroup – font design attributes. More...

class	CFontMap
	CFontMap – Container for font objects of a CGM picture and used for text drawing and metrics in DrawBase classes. More...

class	CFontProperties
	CFontProperties – FontProperties attributes. More...

class	CGeometricPatternTables
	CGeometricPatternTables – pattern tables container class. More...

class	CHatchStyles
	CHatchStyles – contains user defined Hatch Style definitions. More...

class	CInterpInteriorParams
	CInterpInteriorParams – Interpolated Interior Style parameters. More...

class	CLineEdgeTypes
	CLineEdgeTypes – contains user defined Line and Edge type definitions. More...

class	CCgmAttrState

class	MakeCgmObjs
	MakeCgmObjs – CGM primitive object creation functions. More...

class	CMatrix
	CMatrix – transform matrix class. More...

class	Parser
	Parser – CGM input element parser. More...

class	Path
	Path – graphical path data container class. More...

class	CPatternTables
	CPatternTables – pattern tables container class. More...

class	PolyPolylineData
	PolyPolylineData – poly-polyline data container class. More...

class	CSegment
	CSegment – Segment class- a segment is a list of picture elements. More...

class	CTextExtent
	CTextExtents – text extents container. More...

struct	aciHatchStyleDefStruct
	WebCGM 2.1 ACI Hatch Style Definition structure. More...

struct	aciLineEdgeTypeDefStruct
	WebCGM 2.1 ACI Line and Edge Definition structure. More...

struct	aciConfigStruct
	WebCGM 2.1 Application Configurable Items (ACI) file structure. More...

Typedefs
typedef struct Larson::CGMI_DS	CGMI_DS
	decoder data stream structure

typedef struct Larson::VDC_PRECISIONS	VDC_PRECISIONS

typedef struct Larson::CgmInError	CgmInError
	encountered while in picture open state

typedef multimap< wchar_t, MapEntry, less< wchar_t > >	cache_type

typedef struct Larson::aciHatchStyleDefStruct	webcgmHatchStyleDefStruct
	WebCGM 2.1 ACI Hatch Style Definition structure.

typedef struct Larson::aciLineEdgeTypeDefStruct	webcgmLineEdgeTypeDefStruct
	WebCGM 2.1 ACI Line and Edge Definition structure.

typedef struct Larson::aciConfigStruct	webcgmConfig
	WebCGM 2.1 Application Configurable Items (ACI) file structure. More...

Functions
long	cellDecode (unsigned long bit_offset, long local_color_prec, unsigned char ucp, unsigned long max_ndx, long error)

void	cgmi_d_ce (unsigned char cgmp, long total, long klass, long element, long count, CGMI_DS cgmi_ds)

void	cgmi_d_ce_ctx (char elemstr[128], long klass, long element)
	CGM clear text decode class and element.

long	cgmi_d_co (CGMI_DS *cgmi_ds, unsigned long op, long cnt, CGMI_FMTBL it, long colorSelectionMode)
	this group of functions returns the number of items decoded (note: 1 pt => 2 vdc) More...

long	cgmi_d_ew (CGMI_DS *cgmi_ds, double op, long cnt, CGMI_FMTBL it, long ewSpecMode, VDC_PRECISIONS vdcPrecisions)

long	cgmi_d_fp (CGMI_DS *cgmi_ds, double op, long cnt, const long *fp)

long	cgmi_d_fx (CGMI_DS *cgmi_ds, double op, long cnt, long *fx)

long	cgmi_d_lw (CGMI_DS *cgmi_ds, double op, long cnt, CGMI_FMTBL it, long lwSpecmode, VDC_PRECISIONS vdcPrecisions)

long	cgmi_d_ms (CGMI_DS *cgmi_ds, double op, long cnt, CGMI_FMTBL it, long msSpecmode, VDC_PRECISIONS vdcPrecisions)

long	cgmi_d_r (CGMI_DS *cgmi_ds, double op, long cnt, CGMI_FMTBL it)

long	cgmi_d_s (CGMI_DS *cgmi_ds, wchar_t op, long cnt, long *chrtyp)

long	cgmi_d_sdre (CGMI_DS cgmi_ds, long n, void outbfp, long buftyp, CGMI_FMTBL it, long p_data_type_index, VDC_PRECISIONS vdcPrecisions)

long	cgmi_d_si (CGMI_DS *cgmi_ds, long op, long cnt, long si_precision)

long	cgmi_d_e (CGMI_DS *cgmi_ds, long op, long cnt, long element)

long	cgmi_d_bs (CGMI_DS *cgmi_ds, unsigned char op)

long	cgmi_d_ui (CGMI_DS *cgmi_ds, unsigned long op, long cnt, long ui_precision)

long	cgmi_d_vdc (CGMI_DS *cgmi_ds, double op, long cnt, CGMI_FMTBL it, VDC_PRECISIONS vdcPrecisions)

long	cgmi_d_cdi (CGMI_DS *cgmi_ds, unsigned long op, long cnt, long ui_precision, long ui_parts)
	CGM Utility Decode Color for internal use only.

long	cgmi_sulen (CGMI_DS *cgmi_ds)

long	cgmi_nchars (long length, long encoding)
	determine number of characters in string for this encoding

void	cgmi_eswab2 (long n, short *buf)

void	cgmi_eswab4 (long n, unsigned long *buf)

double	get_power_of_ten (long exponent, long negative)

long	getPrecFromInt (unsigned long maxint)

long	getPrecFromSignedInt (long maxint)

void	trimFontName (std::wstring &name)

std::wstring	normalizeFontName (std::wstring &name)

bool	PtInPolygon (DPoint *polygon, int N, DPoint p)

bool	PtInPolygonSet (DPoint polygon, int np, unsigned char edges, DPoint p)

bool	PtOnLine (DPoint pt0, DPoint pt1, DPoint ptMouse, double nWidth)

bool	IntersectLines (DPoint &p0, DPoint &p1, DPoint &p2, DPoint &p3, DPoint *i)

void	QuadraticToCubicBezier (DPoint &QP0, DPoint &QP1, DPoint &QP2, DPoint CP1, DPoint CP2)

double	PolygonArea (DPoint *polygon, int nPoints)

Variables
unsigned short	defpats16 [NPATS16][HW16]

unsigned short const	defpats884 [NPATS16][HW16]

Detailed Description

// Usage example:

#inlcude "CgmInfo" using namespace Larson; using namespace std;

    wstring cgmFile = allelm01.cgm";

    // open a cgm file and extract metafile and picture inofmration
    CgmInfo info(cgmFile);

    // get metafile descriptor information
    CgmInfo::MetafileInfo mfInfo;
    info.getMetafileInfo(mfInfo);

    // get list of pictures and information about each picture
    vector<CgmInfo::PictureInfo> picsInfo;
    info.getPictureInfo(picsInfo);

    for (size_t i = 0; i < picsInfo.size(); i++)
    {
            // print size of each picture in MM
            double width = (abs(picsInfo[i].vdcExtent[1].x - picsInfo[i].[0].x) * picsInfo[i].scalingFactor);
            double height = (abs(picsInfo[i].vdcExtent[1].y - picsInfo[i].vdcExtent[0].y) * picsInfo[i].scalingFactor);

            cout << "width and height in MM = " << width << ", " << height << endl;

Typedef Documentation

typedef struct Larson::aciConfigStruct Larson::webcgmConfig

WebCGM 2.1 Application Configurable Items (ACI) file structure.

The ACI file provides a mechanism to specify default handling for certain CGM Version 3 elements that may not have a specific default treatment according to the rules of CGM:1999 or the WebCGM profile.

Function Documentation

long Larson::cgmi_d_bs	(	CGMI_DS **	cgmi_ds,
		unsigned char *	op
	)

CGM Decode Cleartext Tile Array Hex Bitstream

Parameters

cgmi_ds	= pointer to input stream structure
op	= output pointer

void Larson::cgmi_d_ce	(	unsigned char *	cgmp,
		long *	total,
		long *	klass,
		long *	element,
		long *	count,
		CGMI_DS *	cgmi_ds
	)

CGM Utility Decode Class and Element calls to cgmi_d_xxx routines.

Parameters

cgmp	[IN] beginning of a CGM packet data
total	[OUT] total number of bytes in CGM element
klass	[OUT] element class number
element	[OUT] element id
count	[OUT] parement list length in bytes
cgmi_ds	[IN/OUT] pointer to cgm data stream struct

long Larson::cgmi_d_co	(	CGMI_DS **	cgmi_ds,
		unsigned long *	op,
		long	cnt,
		CGMI_FMTBL	it,
		long	colorSelectionMode
	)

this group of functions returns the number of items decoded (note: 1 pt => 2 vdc)

CGM Utility Decode Color extract (decode) one or more colors (indexed or direct) from the CGM element based on and updating the info in the cgmi_ds data structure. This routine is the routine called when cgmi_d_co is invoked. returns the number of items decoded

Parameters

cgmi_ds	= pointer to input stream structure
op	= output pointer
cnt	= number of items to decode
it	= decoder format table

long Larson::cgmi_d_e	(	CGMI_DS **	cgmi_ds,
		long *	op,
		long	cnt,
		long	element
	)

CGM Utility Decode Enum extract (decode) one or more enumerated values from the CGM element based on and updating the info in the cgmi_ds data structure. This is the actual routine called when cgmi_d_e is invoked. returns the number of items decoded

Parameters

cgmi_ds	= pointer to input stream structure
op	= output pointer
cnt	= number of items to decode

long Larson::cgmi_d_ew	(	CGMI_DS **	cgmi_ds,
		double *	op,
		long	cnt,
		CGMI_FMTBL	it,
		long	ewSpecMode,
		VDC_PRECISIONS	vdcPrecisions
	)

CGM Utility Decode Edge Width extract (decode) edge width from the CGM element based on and updating the info in the cgmi_ds data structure. This routine is the routine called when cgmi_d_ew is invoked. returns the number of items decoded

Parameters

cgmi_ds	= pointer to input stream structure
op	= output pointer
it	= decoder format table

long Larson::cgmi_d_fp	(	CGMI_DS **	cgmi_ds,
		double *	op,
		long	cnt,
		const long *	fp
	)

CGM Utility Decode Floating Point extract (decode) one or more floating points from the CGM element based on and updating the info in the cgmi_ds data structure. This routine is an internal routine called from cgmi_d_r or cgmi_d_vdc. returns the number of items decoded

Parameters

cgmi_ds	= pointer to input stream structure
op	= output pointer
cnt	= number of items to decode
fp	= floating ppoint precision; fp[0] = exponent length, fp[1] mantissa length;

long Larson::cgmi_d_fx	(	CGMI_DS **	cgmi_ds,
		double *	op,
		long	cnt,
		long *	fx
	)

CGM Utility Decode Fixed Point extract (decode) one or more fixed points from the CGM element based on and updating the info in the cgmi_ds data structure. This routine is an internal routine called from cgmi_d_r or cgmi_d_vdc. returns the number of items decoded

Parameters

cgmi_ds	= pointer to input stream structure
op	= output pointer
cnt	= number of items to decode
fx	= fixed point precision; fp[0] = exponent length, fp[1] mantissa length;

long Larson::cgmi_d_lw	(	CGMI_DS **	cgmi_ds,
		double *	op,
		long	cnt,
		CGMI_FMTBL	it,
		long	lwSpecmode,
		VDC_PRECISIONS	vdcPrecisions
	)

CGM Utility Decode Line Width extract (decode) line width from the CGM element based on and updatin the info in the cgmi_ds data structure. This routine is the routine called when cgmi_d_lw is invoked. returns the number of items decoded

Parameters

cgmi_ds	= pointer to input stream structure
op	= output pointer
it	= decoder format table

long Larson::cgmi_d_ms	(	CGMI_DS **	cgmi_ds,
		double *	op,
		long	cnt,
		CGMI_FMTBL	it,
		long	msSpecmode,
		VDC_PRECISIONS	vdcPrecisions
	)

CGM Utility Decode Marker Size extract (decode) marker size from the CGM element based on and updating the info in the cgmi_ds data structure. This routine is the routine called when cgmi_d_ms is invoked. returns the number of items decoded

Parameters

cgmi_ds	= pointer to input stream structure
op	= output pointer
it	= decoder format table

long Larson::cgmi_d_r	(	CGMI_DS **	cgmi_ds,
		double *	op,
		long	cnt,
		CGMI_FMTBL	it
	)

CGM Utility Decode Real extract (decode) one or more real from the CGM element based on and updating the info in the cgmi_ds data structure. This is the actual routine called when cgmi_d_r is invoked. returns the number of items decoded

Parameters

cgmi_ds	= pointer to input stream structure
op	= output pointer
it	= decoder format table

long Larson::cgmi_d_s	(	CGMI_DS **	cgmi_ds,
		wchar_t *	op,
		long	cnt,
		long *	chrtyp
	)

CGM Utility Decode String extract (decode) a variable length string from the CGM element based on and updating the info in the cgmi_ds data structure. This routine is called internally routine called from cgmi_d_sdre. This routine will add a NULL ((wchar_t)0) to the end of the string. returns: <0 = error, 0 = OK, >0 overflows

Parameters

cgmi_ds	= pointer to input stream structure
op	= output pointer
cnt	= sizeof output buffer in wchar_t units or ZERO (0) if output buffer needs to be allocated to hold output string
chrtype	= character encdoind type; CHR_ASCII, CHR_UTF8, CHR_UTF16, or -1 if not yet determined in which case it will be set to one of the 3 type

long Larson::cgmi_d_sdre	(	CGMI_DS *	cgmi_ds,
		long	n,
		void **	outbfp,
		long	buftyp,
		CGMI_FMTBL	it,
		long *	p_data_type_index,
		VDC_PRECISIONS	vdcPrecisions
	)

CGM Utility Decode Standard Data Record (SDR) If an output buffer is not provided (i.e. it is NULL) and there is data (i.e. data_type_count > 0) an output buffer is 'malloc'ed and it is the callers responsibility to 'free' it later [the caller knows if it sent a NULL output buffer]. return actual number decoded

Parameters

cgmi_ds	= pointer to input stream structure
n	= number of items to decode
outbfp	= pointer to output buffer
it	= decoder format table
p_data_type_index	= pointer to SDR data type

long Larson::cgmi_d_si	(	CGMI_DS **	cgmi_ds,
		long *	op,
		long	cnt,
		long	si_precision
	)

CGM Utility Decode Signed Integer extract (decode) one or more signed integers from the CGM element based on and updating the info in the cgmi_ds data structure. This is the actual routine called when cgmi_d_ix, cgmi_d_e and cgmi_d_i are invoked. returns the number of items decoded

Parameters

cgmi_ds	= pointer to input stream structure
op	= output pointer
cnt	= number of items to decode

long Larson::cgmi_d_ui	(	CGMI_DS **	cgmi_ds,
		unsigned long *	op,
		long	cnt,
		long	ui_precision
	)

CGM Utility Decode Unsigned Integer extract (decode) one or more unsigned integers from the CGM element based on and updating the info in the cgmi_ds data structure. This is the actual routine called when cgmi_d_ci and cgmi_d_d are invoked. returns the number of items decoded

Parameters

cgmi_ds	= pointer to input stream structure
op	= output pointer
cnt	= number of items to decode

long Larson::cgmi_d_vdc	(	CGMI_DS **	cgmi_ds,
		double *	op,
		long	cnt,
		CGMI_FMTBL	it,
		VDC_PRECISIONS	vdcPrecisions
	)

CGM Utility Decode Virtual Device Coordinate extract (decode) one or more VD coordinates from the CGM element based on and updating the info in the cgmi_ds data structure. This is the actual routine called when cgmi_d_p and cgmi_d_vdc is invoked. returns the number of items decoded

Parameters

cgmi_ds	= pointer to input stream structure
op	= output pointer
cnt	= number of items to decode
it	= decoder format table

long Larson::cgmi_sulen ( CGMI_DS * cgmi_ds )

determine number of bytes for S or SF data type - refer to Table 1 of ISO 8632-3 Binary Encoding for details for Clear Text decoding this will search for string delimiter

Classes

Typedefs

Functions

Variables

Detailed Description

Typedef Documentation

Function Documentation