Chain Code Line Rasterization

Functions
int	rapp_rasterize_4conn (char *line, int xs, int ys, int xe, int ye)
	Rasterize a 4-connectivity chain code.
int	rapp_rasterize_8conn (char *line, int xs, int ys, int xe, int ye)
	Rasterize an 8-connectivity chain code.

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Detailed Description

Next section: Conditional Operations

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Function Documentation

int rapp_rasterize_4conn	(	char *	line,
		int	xs,
		int	ys,
		int	xe,
		int	ye
	)

Rasterize a 4-connectivity chain code.

Parameters:

[out]	line	Chain code string buffer with at least abs(xe - xs) + abs(ye - ys) + 1 bytes.
	xs	Start position x coordinate.
	ys	Start position y coordinate.
	xe	End position x coordinate.
	ye	End position y coordinate.

Returns:

The number of codes written to the buffer, not including the trailing '\0' character, or a negative error code on error.

int rapp_rasterize_8conn	(	char *	line,
		int	xs,
		int	ys,
		int	xe,
		int	ye
	)

Rasterize an 8-connectivity chain code.

Parameters:

[out]	line	Chain code string buffer with at least max(abs(xe - xs), abs(ye - ys)) + 1 bytes.
	xs	Start position x coordinate.
	ys	Start position y coordinate.
	xe	End position x coordinate.
	ye	End position y coordinate.

Returns:

The number of codes written to the buffer, not including the trailing '\0' character, or a negative error code on error.