Generic Drawing Functions

Function prototypes. More...

Defines
#define	DRAWGEN_4Connected   0x0080
#define	DRAWGEN_Closed   0x0002
#define	DRAWGEN_NoLastPixel   0x0040
#define	TRACEGEN_8Connected   0x0001
Typedefs
typedef fastdelegate::FastDelegate < ERRVALUE(INT32, INT32)>	DELEGATE_DRAWGEN_POINT
typedef fastdelegate::FastDelegate < ERRVALUE(INT32, INT32, INT32)>	DELEGATE_DRAWGEN_SPAN
typedef fastdelegate::FastDelegate < int(INT32, INT32)>	DELEGATE_DRAWGEN_TEST
typedef int(*	GDrawHSpanL )(INT32, INT32, INT32, void *)
typedef int(*	GDrawPointL )(INT32, INT32, void *)
typedef int(*	GTestPointL )(INT32, INT32, void *)
Functions
ERRVALUE	DrawGenCircleFilled (INT32 x, INT32 y, INT32 radius, DELEGATE_DRAWGEN_SPAN DelegateSpan)
GEOMLIBEXPORT int	DrawLineGen (INT32 x1, INT32 y1, INT32 x2, INT32 y2, GDrawPointL gdrawpoint, void *userdata, UINT32 flags)
GEOMLIBEXPORT int	DrawLinesGen (LPOINT2D *points, int numpoints, GDrawPointL gdrawpoint, void *userdata, UINT32 flags)
GEOMLIBEXPORT int	DrawLineWideGen (INT32 x1, INT32 y1, INT32 x2, INT32 y2, double width, GDrawHSpanL gdrawhspan, GDrawPointL gdrawpoint, void *userdata, UINT32 flags)
GEOMLIBEXPORT int	FillPolygonsGen (int numpolys, LPOLYGON *polys, GDrawHSpanL gdrawhspan, GDrawPointL gdrawpoint, void *userdata, UINT32 flags=0, MISTATUSMANAGER *pStatusMgr=0)
int	FillSeededGenL (INT32 SeedX, INT32 SeedY, GTestPointL TestInside, GDrawHSpanL gdrawhspan, LPOINT2D *boundpt, void *userdata, UINT32 flags)
int	TraceBoundaryL (INT32 xstart, INT32 ystart, LPOLYGON *poly, GTestPointL testfunc, void *userdata, UINT32 flags)

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Detailed Description

Function prototypes.

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Define Documentation

#define DRAWGEN_4Connected   0x0080

Draw 4-connected lines in MxgDrawLineGenX().

#define DRAWGEN_Closed   0x0002

Set to "close" polylines, forming a polygon.

#define DRAWGEN_NoLastPixel   0x0040

Don't draw last pixel in horizontal span when filling.

#define TRACEGEN_8Connected   0x0001

Trace 8-connected boundary.

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Typedef Documentation

typedef fastdelegate::FastDelegate<ERRVALUE(INT32,INT32)> DELEGATE_DRAWGEN_POINT

Delegate for drawing single point, parameters are X, Y.

typedef fastdelegate::FastDelegate<ERRVALUE(INT32,INT32,INT32)> DELEGATE_DRAWGEN_SPAN

Delegate for drawing span, parameters are X1, X2, Y.

typedef fastdelegate::FastDelegate<int(INT32,INT32)> DELEGATE_DRAWGEN_TEST

Delegate for testing single point, parameters are X, Y, return TRUE if included, FALSE if not, < 0 error.

typedef int(* GDrawHSpanL)(INT32, INT32, INT32, void *)

Generic horizontal span function.

typedef int(* GDrawPointL)(INT32, INT32, void *)

Generic putpixel function.

typedef int(* GTestPointL)(INT32, INT32, void *)

Generic function to test if point in region.

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Function Documentation

ERRVALUE DrawGenCircleFilled	(	INT32	x,
		INT32	y,
		INT32	radius,
		DELEGATE_DRAWGEN_SPAN	DelegateSpan
	)

Draw filled circle.

Parameters:

	x	X coordinate of center
	y	Y coordinate of center
	radius	Radius in pixels
	DelegateSpan	Delegate for drawing span

GEOMLIBEXPORT int DrawLineGen	(	INT32	x1,
		INT32	y1,
		INT32	x2,
		INT32	y2,
		GDrawPointL	gdrawpoint,
		void *	userdata,
		UINT32	flags
	)

Draw multiple connected lines on "generic display".

Parameters:

	x1	Starting X coordinate
	y1	Starting Y coordinate
	x2	Ending X coordinate
	y2	Ending Y coordinate
	gdrawpoint	Generic putpixel function
	userdata	Data to pass on to drawhspan
	flags	Flags: DRAWGEN_4Connected Create 4-connected line (default is 8-connected)

GEOMLIBEXPORT int DrawLinesGen	(	LPOINT2D *	points,
		int	numpoints,
		GDrawPointL	gdrawpoint,
		void *	userdata,
		UINT32	flags
	)

Draw multiple connected lines on "generic display".

Parameters:

	points	Array of points
	numpoints	Number of points
	gdrawpoint	Generic putpixel function
	userdata	Data to pass on to drawhspan
	flags	Flags: DRAWGEN_4Connected Create 4-connected line (default is 8-connected) DRAWGEN_Closed Line defines close shape

GEOMLIBEXPORT int DrawLineWideGen	(	INT32	x1,
		INT32	y1,
		INT32	x2,
		INT32	y2,
		double	width,
		GDrawHSpanL	gdrawhspan,
		GDrawPointL	gdrawpoint,
		void *	userdata,
		UINT32	flags
	)

Draw wide line on "generic display".

Parameters:

	x1	Starting X coordinate
	y1	Starting Y coordinate
	x2	Ending X coordinate
	y2	Ending y coordinate
	width	Line width in pixels
	gdrawhspan	Generic horizontal span function
	gdrawpoint	Generic putpixel function
	userdata	Data to pass on to drawhspan
	flags	Flags: DRAWGEN_4Connected Create 4-connected line (default is 8-connected)

GEOMLIBEXPORT int FillPolygonsGen	(	int	numpolys,
		LPOLYGON *	polys,
		GDrawHSpanL	gdrawhspan,
		GDrawPointL	gdrawpoint,
		void *	userdata,
		UINT32	flags = 0,
		MISTATUSMANAGER *	pStatusMgr = 0
	)

Fill polygon(s) in generic bitmap.

Parameters:

	numpolys	Number of polygons to fill
	polys	Array of polygons to fill
	gdrawhspan	Generic horizontal span function
	gdrawpoint	Generic putpixel function
	userdata	Data to pass on to drawhspan/drawpoint
	flags	Flags: DRAWGEN_NoLastPixel Don't draw last pixel in horizontal span when filling
	pStatusMgr	Status manager, 0 to not report status

int FillSeededGenL	(	INT32	SeedX,
		INT32	SeedY,
		GTestPointL	TestInside,
		GDrawHSpanL	gdrawhspan,
		LPOINT2D *	boundpt,
		void *	userdata,
		UINT32	flags
	)

Perform seeded fill on "generic display" (LONG coordinates).

Parameters:

	SeedX	Seed point X coordinate
	SeedY	Seed point Y coordinate
	TestInside	Function to test if a point is inside region
	gdrawhspan	Function to "draw" horizontal spans
	boundpt	Rightmost "boundary" point returned (NULL if not needed)
	userdata	Data to pass to TestInside and DrawHSpan functions
	flags	Flags (none currently defined)

int TraceBoundaryL	(	INT32	xstart,
		INT32	ystart,
		LPOLYGON *	poly,
		GTestPointL	testfunc,
		void *	userdata,
		UINT32	flags
	)

Find boundary of a region (LONG coordinates).

Parameters:

	xstart	X starting coordinate
	ystart	Y starting coordinate
	poly	Polygon returned
	testfunc	Function to test if point in region
	userdata	Data to be passed to testfunc
	flags	Flags: TRACEGEN_8Connected Trace 8-connected (allow diagonals) boundary