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JavaTM 2 Platform Standard Ed. 5.0 |
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java.lang.Objectjava.awt.image.BufferStrategy
java.awt.Component.BltBufferStrategy
protected class Component.BltBufferStrategy
Inner class for blitting offscreen surfaces to a component.
| Field Summary | |
|---|---|
protected VolatileImage[] |
backBuffers
The back buffers |
protected BufferCapabilities |
caps
The buffering capabilities |
protected int |
height
|
protected boolean |
validatedContents
Whether or not the drawing buffer has been recently restored from a lost state. |
protected int |
width
Size of the back buffers |
| Constructor Summary | |
|---|---|
protected |
Component.BltBufferStrategy(int numBuffers,
BufferCapabilities caps)
Creates a new blt buffer strategy around a component |
| Method Summary | |
|---|---|
boolean |
contentsLost()
Returns whether the drawing buffer was lost since the last call to getDrawGraphics. |
boolean |
contentsRestored()
Returns whether the drawing buffer was recently restored from a lost state and reinitialized to the default background color (white). |
protected void |
createBackBuffers(int numBuffers)
Creates the back buffers |
BufferCapabilities |
getCapabilities()
|
Graphics |
getDrawGraphics()
|
protected void |
revalidate()
Restore the drawing buffer if it has been lost |
void |
show()
Makes the next available buffer visible. |
| Methods inherited from class java.lang.Object |
|---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Field Detail |
|---|
protected BufferCapabilities caps
protected VolatileImage[] backBuffers
protected boolean validatedContents
protected int width
protected int height
| Constructor Detail |
|---|
protected Component.BltBufferStrategy(int numBuffers,
BufferCapabilities caps)
numBuffers - the component to use as the front buffercaps - the capabilities of the buffers| Method Detail |
|---|
protected void createBackBuffers(int numBuffers)
public BufferCapabilities getCapabilities()
getCapabilities in class BufferStrategypublic Graphics getDrawGraphics()
getDrawGraphics in class BufferStrategypublic void show()
show in class BufferStrategyprotected void revalidate()
public boolean contentsLost()
BufferStrategygetDrawGraphics. Since the buffers in a buffer strategy
are usually type VolatileImage, they may become lost.
For a discussion on lost buffers, see VolatileImage.
contentsLost in class BufferStrategygetDrawGraphicsVolatileImagepublic boolean contentsRestored()
BufferStrategyVolatileImage, 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.
contentsRestored in class BufferStrategyVolatileImage
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JavaTM 2 Platform Standard Ed. 5.0 |
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Copyright 2004 Sun Microsystems, Inc. All rights reserved. Use is subject to license terms. Also see the documentation redistribution policy.