SkyGI::RegionSupport Class Reference

List of all members.

Static Public Member Functions
static void	ZeroRegion (Region &region)
	zeroes the given region, setting its rect count to 0, and invalidating its bound rectangle.
static void	ClearRegion (Region &region)
	clear the given region, setting its rect count to 0, and setting its bound rectangle to 0xFFFFFFF, 0xFFFFFFF, 0xF0000001, 0xF0000001.
static void	CopyRegion (const Region &source, Region &dest)
	Copy a region to another.
static void	AndRegion (const Region &first, const Region &second, Region &dest)
	Modify the destination region to be the intersection of the two given regions.
static void	OrRegion (const Region &first, const Region &second, Region &dest)
	Modify the destination region to be the union of the two given regions.
static void	SuRegion (const Region &first, const Region &second, Region &dest)
	Modify the destination region to be the difference of the two given regions.

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Member Function Documentation

void RegionSupport::ZeroRegion

(

Region &

region

)

[static]

zeroes the given region, setting its rect count to 0, and invalidating its bound rectangle.

Parameters:

region

The region to be zeroed.

void RegionSupport::ClearRegion

(

Region &

region

)

[static]

clear the given region, setting its rect count to 0, and setting its bound rectangle to 0xFFFFFFF, 0xFFFFFFF, 0xF0000001, 0xF0000001.

Parameters:

region

The region to be cleared.

void RegionSupport::CopyRegion	(	const Region &	source,
		Region &	dest
	)			[static]

Copy a region to another.

Parameters:

	source	The region to be copied.
	dest	The destination region.

void RegionSupport::AndRegion	(	const Region &	first,
		const Region &	second,
		Region &	dest
	)			[static]

Modify the destination region to be the intersection of the two given regions.

Parameters:

	first	The first region to be intersected.
	second	The second region to be intersected.
	dest	The destination region.

This function is a sort of method selector. It checks for some special cases, then it calls the appropriate specialized function.

void RegionSupport::OrRegion	(	const Region &	first,
		const Region &	second,
		Region &	dest
	)			[static]

Modify the destination region to be the union of the two given regions.

Parameters:

	first	The first region to be merged.
	second	The second region to be merged.
	dest	The destination region.

This function is a sort of method selector. It checks for some special cases, then it calls the appropriate specialized function.

void RegionSupport::SuRegion	(	const Region &	first,
		const Region &	second,
		Region &	dest
	)			[static]

Modify the destination region to be the difference of the two given regions.

Parameters:

	first	The subtraend region.
	second	The minuend region.
	dest	The destination region.

This function is a sort of method selector. It checks for some special cases, then it calls the appropriate specialized function.

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