Generic Drawing Functions

:Associate with "Generic Drawing Functions" More...

Defines
#define	DRAWGEN_4Connected   0x0080
#define	DRAWGEN_Closed   0x0002
#define	DRAWGEN_Highlight   0x0001
#define	DRAWGEN_NoLastPixel   0x0040
#define	TRACEGEN_8Connected   0x0001
Typedefs
typedef int(*)	GDrawHSpanL (INT32, INT32, INT32, void *)
typedef int(*)	GDrawPointL (INT32, INT32, void *)
typedef int(*)	GTestPointL (INT32, INT32, void *)
Functions
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)
int	FillCircleGen (INT32 x, INT32 y, INT32 radius, GDrawHSpanL gdrawhspan, void *userdata, UINT32 flags)
GEOMLIBEXPORT int	FillPolygonsGen (int numpolys, LPOLYGON *polys, GDrawHSpanL gdrawhspan, GDrawPointL gdrawpoint, void *userdata, MSTATUSINTERFACE statinterface, UINT32 flags)
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)

---

Detailed Description

:Associate with "Generic Drawing Functions"

---

Define Documentation

#define DRAWGEN_4Connected   0x0080

Draw 4-connected lines in MxgDrawLineGenX().

Definition at line 53 of file drawgen.h.

#define DRAWGEN_Closed   0x0002

Set to "close" polylines, forming a polygon.

Definition at line 51 of file drawgen.h.

#define DRAWGEN_Highlight   0x0001

"Highlight" when drawing

Definition at line 50 of file drawgen.h.

#define DRAWGEN_NoLastPixel   0x0040

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

Definition at line 52 of file drawgen.h.

#define TRACEGEN_8Connected   0x0001

Trace 8-connected boundary.

Definition at line 55 of file drawgen.h.

---

Typedef Documentation

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

Generic horizontal span function.

Definition at line 42 of file drawgen.h.

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

Generic putpixel function.

Definition at line 45 of file drawgen.h.

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

Generic function to test if point in region.

Definition at line 48 of file drawgen.h.

---

Function Documentation

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)

int FillCircleGen	(	INT32	x,
		INT32	y,
		INT32	radius,
		GDrawHSpanL	gdrawhspan,
		void *	userdata,
		UINT32	flags
	)

Fill circle in generic bitmap.

Parameters:

x	X coordinate of center
y	Y coordinate of center
radius	Radius in pixels
gdrawhspan	Generic horizontal span function
userdata	Data to pass on to drawhspan
flags	Flags (none currently)

GEOMLIBEXPORT int FillPolygonsGen	(	int	numpolys,
		LPOLYGON *	polys,
		GDrawHSpanL	gdrawhspan,
		GDrawPointL	gdrawpoint,
		void *	userdata,
		MSTATUSINTERFACE	statinterface,
		UINT32	flags
	)

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
statinterface	Status interface
flags	Flags: DRAWGEN_NoLastPixel Don't draw last pixel in horizontal span when filling

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

---