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JavaTM 2 Platform Standard Ed. 5.0 |
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java.lang.Objectjava.awt.image.BufferStrategy
java.awt.Component.FlipBufferStrategy
protected class Component.FlipBufferStrategy
Inner class for flipping buffers on a component. That component must
be a Canvas or Window.
Canvas,
Window,
BufferStrategy| Field Summary | |
|---|---|
protected BufferCapabilities |
caps
The buffering capabilities |
protected Image |
drawBuffer
The drawing buffer |
protected VolatileImage |
drawVBuffer
The drawing buffer as a volatile image |
protected int |
numBuffers
The number of buffers |
protected boolean |
validatedContents
Whether or not the drawing buffer has been recently restored from a lost state. |
| Constructor Summary | |
|---|---|
protected |
Component.FlipBufferStrategy(int numBuffers,
BufferCapabilities caps)
Creates a new flipping buffer strategy for this 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 |
createBuffers(int numBuffers,
BufferCapabilities caps)
Creates one or more complex, flipping buffers with the given capabilities. |
protected void |
destroyBuffers()
Destroys the buffers created through this object |
protected void |
flip(BufferCapabilities.FlipContents flipAction)
Flipping moves the contents of the back buffer to the front buffer, either by copying or by moving the video pointer. |
protected Image |
getBackBuffer()
|
BufferCapabilities |
getCapabilities()
|
Graphics |
getDrawGraphics()
|
protected void |
revalidate()
Restore the drawing buffer if it has been lost |
void |
show()
Makes the next available buffer visible by either blitting or flipping. |
| Methods inherited from class java.lang.Object |
|---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Field Detail |
|---|
protected int numBuffers
protected BufferCapabilities caps
protected Image drawBuffer
protected VolatileImage drawVBuffer
protected boolean validatedContents
| Constructor Detail |
|---|
protected Component.FlipBufferStrategy(int numBuffers,
BufferCapabilities caps)
throws AWTException
Canvas or Window.
numBuffers - the number of bufferscaps - the capabilities of the buffers
AWTException - if the capabilities supplied could not be
supported or met
ClassCastException - if the component is not a canvas or
window.Canvas,
Window| Method Detail |
|---|
protected void createBuffers(int numBuffers,
BufferCapabilities caps)
throws AWTException
numBuffers - number of buffers to create; must be greater than
onecaps - the capabilities of the buffers.
BufferCapabilities.isPageFlipping must be
true.
AWTException - if the capabilities supplied could not be
supported or met
IllegalStateException - if the component has no peer
IllegalArgumentException - if numBuffers is less than two,
or if BufferCapabilities.isPageFlipping is not
true.BufferCapabilities.isPageFlipping()protected Image getBackBuffer()
IllegalStateException - if the buffers have not yet
been createdprotected void flip(BufferCapabilities.FlipContents flipAction)
flipAction - an integer value describing the flipping action
for the contents of the back buffer. This should be one of the
values of the BufferCapabilities.FlipContents
property.
IllegalStateException - if the buffers have not yet
been createdBufferCapabilities.getFlipContents()protected void destroyBuffers()
public BufferCapabilities getCapabilities()
getCapabilities in class BufferStrategypublic Graphics getDrawGraphics()
getDrawGraphics 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 BufferStrategyVolatileImagepublic void show()
show in class BufferStrategy
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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.