JavaFX 24 · com.sun.prism.impl.packrect.RectanglePacker

Packs rectangles supplied by the user (typically representing image regions) into a larger backing store rectangle (typically representing a large texture). Supports automatic compaction of the space on the backing store, and automatic expansion of the backing store, when necessary.

Field Summary

Modifier and Type	Field and Description
private Texture	backingStore A reference to the backing store that was created (lazily) by the backing store manager.
private int	length
private List<Level>	levels Manages a list of Levels; this is the core data structure contained within the RectanglePacker and encompasses the storage algorithm for the contained Rects.
private static final int	MIN_SIZE
private int	recentUsedLevelIndex
private static final int	ROUND_UP
private int	size
private int	sizeOffset
private boolean	vertical
private int	x
private int	y

Constructor Summary

Access	Constructor and Description
public	RectanglePacker(Texture backingStore, int x, int y, int width, int height, boolean vertical)
public	RectanglePacker(Texture The backing store texture, must not be null backingStore, int The width of the backing store, must be > 0 (typically > 512) width, int The height of the backing store, must be > 0 (typically > 512) height) Creates a new RectanglePacker.

Method Summary

Modifier and Type	Method and Description
public final boolean	add(Rectangle rect) Decides upon an (x, y) position for the given rectangle (leaving its width and height unchanged) and places it on the backing store.
private static int	binarySearch(List<Level> levels, int k) Using binary search to find the last index of best fit level for k, where k is a rounded-up value.
public void	clear() Clears all Rectangles contained in this RectanglePacker.
public void	dispose() Disposes the backing store allocated by the BackingStoreManager.
public final Texture	Returns: A reference to the backing store. getBackingStore() Gets a reference to the backing store, creating it lazily if necessary.

Inherited from java.lang.Object:: clone equals finalize getClass hashCode notify notifyAll toString wait wait wait

Field Detail

backingStore	back to summary
private Texture backingStore A reference to the backing store that was created (lazily) by the backing store manager.

length	back to summary
private int length

levels	back to summary
private List<Level> levels Manages a list of Levels; this is the core data structure contained within the RectanglePacker and encompasses the storage algorithm for the contained Rects.

MIN_SIZE	back to summary
private static final int MIN_SIZE

recentUsedLevelIndex	back to summary
private int recentUsedLevelIndex

ROUND_UP	back to summary
private static final int ROUND_UP

size	back to summary
private int size

sizeOffset	back to summary
private int sizeOffset

vertical	back to summary
private boolean vertical

x	back to summary
private int x

y	back to summary
private int y

Constructor Detail

RectanglePacker	back to summary
public RectanglePacker(Texture backingStore, int x, int y, int width, int height, boolean vertical)

RectanglePacker	back to summary
public RectanglePacker(Texture backingStore, int width, int height) Creates a new RectanglePacker. You must specify the texture used as the backing store, and the width and height of the space within which rectangles are to be packed. Parameters backingStore:Texture The backing store texture, must not be null width:int The width of the backing store, must be > 0 (typically > 512) height:int The height of the backing store, must be > 0 (typically > 512)

RectanglePacker

back to summary

public RectanglePacker(Texture backingStore, int width, int height)

Creates a new RectanglePacker. You must specify the texture used as the backing store, and the width and height of the space within which rectangles are to be packed.

Parameters

backingStore:Texture: The backing store texture, must not be null
width:int: The width of the backing store, must be > 0 (typically > 512)
height:int: The height of the backing store, must be > 0 (typically > 512)

Method Detail

add	back to summary
public final boolean add(Rectangle rect) Decides upon an (x, y) position for the given rectangle (leaving its width and height unchanged) and places it on the backing store.

binarySearch	back to summary
private static int binarySearch(List<Level> levels, int k) Using binary search to find the last index of best fit level for k, where k is a rounded-up value.

clear	back to summary
public void clear() Clears all Rectangles contained in this RectanglePacker.

dispose	back to summary
public void dispose() Disposes the backing store allocated by the BackingStoreManager. This RectanglePacker may no longer be used after calling this method.

getBackingStore	back to summary
public final Texture getBackingStore() Gets a reference to the backing store, creating it lazily if necessary. Returns:Texture A reference to the backing store.

getBackingStore