java.lang.Object
- java.awt.image.BufferStrategy
- - java.awt.Component.BltBufferStrategy

Enclosing class:

Component

protected class Component.BltBufferStrategy extends java.awt.image.BufferStrategy

Inner class for blitting offscreen surfaces to a component.

Since:

1.4

Fields
	Modifier and Type	Field and Description
	backBuffers	`protected java.awt.image.VolatileImage[]` backBuffers The back buffers protected java.awt.image.VolatileImage[] backBuffers The back buffers
	caps	`protected BufferCapabilities` caps The buffering capabilities protected BufferCapabilities caps The buffering capabilities
	height	`protected int` height protected int height
	validatedContents	`protected boolean` validatedContents Whether or not the drawing buffer has been recently restored from a lost state. protected boolean validatedContents Whether or not the drawing buffer has been recently restored from a lost state.
	width	`protected int` width Size of the back buffers protected int width Size of the back buffers

Constructors
	Modifier	Constructor and Description
	Component.BltBufferStrategy	`protected` Component.BltBufferStrategy(int numBuffers, BufferCapabilities caps) Creates a new blt buffer strategy around a component protected Component.BltBufferStrategy(int numBuffers, BufferCapabilities caps) Creates a new blt buffer strategy around a component Parameters: `numBuffers` - number of buffers to create, including the front buffer `caps` - the capabilities of the buffers

Methods
	Modifier and Type	Method and Description
	contentsLost	`boolean` contentsLost() Returns whether the drawing buffer was lost since the last call to `getDrawGraphics`. public boolean contentsLost() Description copied from class: `java.awt.image.BufferStrategy` Returns whether the drawing buffer was lost since the last call to `getDrawGraphics`. Since the buffers in a buffer strategy are usually type `VolatileImage`, they may become lost. For a discussion on lost buffers, see `VolatileImage`. Specified by: `contentsLost` in class `java.awt.image.BufferStrategy` Returns: whether the drawing buffer was lost since the last call to `getDrawGraphics` See Also: `VolatileImage`
	contentsRestored	`boolean` contentsRestored() Returns whether the drawing buffer was recently restored from a lost state and reinitialized to the default background color (white). public boolean contentsRestored() Description copied from class: `java.awt.image.BufferStrategy` Returns whether the drawing buffer was recently restored from a lost state and reinitialized to the default background color (white). Since the buffers in a buffer strategy are usually type `VolatileImage`, they may become lost. If a surface has been recently restored from a lost state since the last call to `getDrawGraphics`, it may require repainting. For a discussion on lost buffers, see `VolatileImage`. Specified by: `contentsRestored` in class `java.awt.image.BufferStrategy` Returns: whether the drawing buffer was recently restored from a lost state and reinitialized to the default background color (white) See Also: `VolatileImage`
	createBackBuffers	`protected void` createBackBuffers(int numBuffers) Creates the back buffers protected void createBackBuffers(int numBuffers) Creates the back buffers
	dispose	`void` dispose() Releases system resources currently consumed by this `BufferStrategy` and removes it from the associated Component. public void dispose() Releases system resources currently consumed by this `BufferStrategy` and removes it from the associated Component. After invoking this method, `getBufferStrategy` will return null. Trying to use a `BufferStrategy` after it has been disposed will result in undefined behavior. Overrides: `dispose` in class `java.awt.image.BufferStrategy` Since: 1.6 See Also: `Window.createBufferStrategy(int)`, `Canvas.createBufferStrategy(int)`, `Window.getBufferStrategy()`, `Canvas.getBufferStrategy()`
	getCapabilities	`BufferCapabilities` getCapabilities() Returns the `BufferCapabilities` for this `BufferStrategy`. public BufferCapabilities getCapabilities() Description copied from class: `java.awt.image.BufferStrategy` Returns the `BufferCapabilities` for this `BufferStrategy`. Specified by: `getCapabilities` in class `java.awt.image.BufferStrategy` Returns: the buffering capabilities of this strategy
	getDrawGraphics	`Graphics` getDrawGraphics() Creates a graphics context for the drawing buffer. public Graphics getDrawGraphics() Description copied from class: `java.awt.image.BufferStrategy` Creates a graphics context for the drawing buffer. This method may not be synchronized for performance reasons; use of this method by multiple threads should be handled at the application level. Disposal of the graphics object obtained must be handled by the application. Specified by: `getDrawGraphics` in class `java.awt.image.BufferStrategy` Returns: the draw graphics
	revalidate	`protected void` revalidate() Restore the drawing buffer if it has been lost protected void revalidate() Restore the drawing buffer if it has been lost
	show	`void` show() Makes the next available buffer visible. public void show() Makes the next available buffer visible. Specified by: `show` in class `java.awt.image.BufferStrategy`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

This document was created by Dulcet from the OpenJDK sources. Copyright © 1993, 2012 Oracle and/or its affiliates. All rights reserved.

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