Urho3D::AreaAllocator Class Reference

Rectangular area allocator. More...

#include <Urho3D/Math/AreaAllocator.h>

Collaboration diagram for Urho3D::AreaAllocator:

Public Member Functions
	AreaAllocator ()
	Default construct with empty size.

	AreaAllocator (int width, int height, bool fastMode=true)
	Construct with given width and height.

	AreaAllocator (int width, int height, int maxWidth, int maxHeight, bool fastMode=true)
	Construct with given width and height, and set the maximum it allows to grow.

void	Reset (int width, int height, int maxWidth=0, int maxHeight=0, bool fastMode=true)
	Reset to given width and height and remove all previous allocations.

bool	Allocate (int width, int height, int &x, int &y)
	Try to allocate an area. Return true if successful, with x & y coordinates filled.

int	GetWidth () const
	Return the current width.

int	GetHeight () const
	Return the current height.

bool	GetFastMode () const
	Return whether uses fast mode. Fast mode uses a simpler allocation scheme which may waste free space, but is OK for eg. fonts.

Private Member Functions
bool	SplitRect (unsigned freeAreaIndex, const IntRect &reserve)
	Remove space from a free rectangle. Return true if the original rectangle should be erased from the free list. Not called in fast mode.

void	Cleanup ()
	Clean up redundant free space. Not called in fast mode.

Private Attributes
PODVector< IntRect >	freeAreas_
	Free rectangles.

IntVector2	size_
	Current size.

IntVector2	maxSize_
	Maximum size it allows to grow. It is zero when it is not allowed to grow.

bool	doubleWidth_ {true}
	The dimension use for next growth. Used internally.

bool	fastMode_ {true}
	Fast mode flag.

Detailed Description

Rectangular area allocator.

The documentation for this class was generated from the following files: