java.awt
class Component.FlipBufferStrategy

java.lang.Object java.awt.image.BufferStrategy java.awt.Component.FlipBufferStrategy

Enclosing class:

Component

protected class Component.FlipBufferStrategy
extends BufferStrategy

Inner class for flipping buffers on a component. That component must be a Canvas or Window.

caps

protected BufferCapabilities caps

The buffering capabilities

drawBuffer

protected Image drawBuffer

The drawing buffer

drawVBuffer

protected VolatileImage drawVBuffer

The drawing buffer as a volatile image

numBuffers

protected int numBuffers

The number of buffers

validatedContents

protected boolean validatedContents

Whether or not the drawing buffer has been recently restored from a lost state.

Component.FlipBufferStrategy

protected Component.FlipBufferStrategy(int numBuffers,
                                       BufferCapabilities caps)
                                throws AWTException

Creates a new flipping buffer strategy for this component. The component must be a Canvas or Window.

Parameters:

numBuffers - the number of buffers

caps - the capabilities of the buffers

Throws:

AWTException - if the capabilities supplied could not be supported or met

contentsLost

public boolean contentsLost()

Overrides:

contentsLost in class BufferStrategy

Returns:

whether the drawing buffer was lost since the last call to getDrawGraphics

contentsRestored

public boolean contentsRestored()

Overrides:

contentsRestored in class BufferStrategy

Returns:

whether the drawing buffer was recently restored from a lost state and reinitialized to the default background color (white)

createBuffers

protected void createBuffers(int numBuffers,
                             BufferCapabilities caps)
                      throws AWTException

Creates one or more complex, flipping buffers with the given capabilities.

Parameters:

numBuffers - number of buffers to create; must be greater than one

caps - the capabilities of the buffers. BufferCapabilities.isPageFlipping must be true.

Throws:

AWTException - if the capabilities supplied could not be supported or met

destroyBuffers

protected void destroyBuffers()

Destroys the buffers created through this object

dispose

public void dispose()

{@inheritDoc}

Overrides:

dispose in class BufferStrategy

flip

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.

Parameters:

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.

getBackBuffer

protected Image getBackBuffer()

Returns:

direct access to the back buffer, as an image.

getCapabilities

public BufferCapabilities getCapabilities()

Overrides:

getCapabilities in class BufferStrategy

Returns:

the buffering capabilities of this strategy

getDrawGraphics

public Graphics getDrawGraphics()

Overrides:

getDrawGraphics in class BufferStrategy

Returns:

the graphics on 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 must be handled by the application.

revalidate

protected void revalidate()

Restore the drawing buffer if it has been lost

show

public void show()

Makes the next available buffer visible by either blitting or flipping.

Overrides:

show in class BufferStrategy