- java.lang.Object
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- java.awt.BufferCapabilities
 
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- All Implemented Interfaces:
- Cloneable
 
 public class BufferCapabilities extends Object implements Cloneable Capabilities and properties of buffers.- Since:
- 1.4
- See Also:
- BufferStrategy.getCapabilities(),- GraphicsConfiguration.getBufferCapabilities()
 
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Nested Class SummaryNested Classes Modifier and Type Class Description static classBufferCapabilities.FlipContentsA type-safe enumeration of the possible back buffer contents after page-flipping
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Constructor SummaryConstructors Constructor Description BufferCapabilities(ImageCapabilities frontCaps, ImageCapabilities backCaps, BufferCapabilities.FlipContents flipContents)Creates a new object for specifying buffering capabilities
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Method SummaryAll Methods Instance Methods Concrete Methods Modifier and Type Method Description Objectclone()Creates and returns a copy of this object.ImageCapabilitiesgetBackBufferCapabilities()BufferCapabilities.FlipContentsgetFlipContents()ImageCapabilitiesgetFrontBufferCapabilities()booleanisFullScreenRequired()booleanisMultiBufferAvailable()booleanisPageFlipping()
 
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Constructor Detail- 
BufferCapabilitiespublic BufferCapabilities(ImageCapabilities frontCaps, ImageCapabilities backCaps, BufferCapabilities.FlipContents flipContents) Creates a new object for specifying buffering capabilities- Parameters:
- frontCaps- the capabilities of the front buffer; cannot be- null
- backCaps- the capabilities of the back and intermediate buffers; cannot be- null
- flipContents- the contents of the back buffer after page-flipping,- nullif page flipping is not used (implies blitting)
- Throws:
- IllegalArgumentException- if frontCaps or backCaps are- null
 
 
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Method Detail- 
getFrontBufferCapabilitiespublic ImageCapabilities getFrontBufferCapabilities() - Returns:
- the image capabilities of the front (displayed) buffer
 
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getBackBufferCapabilitiespublic ImageCapabilities getBackBufferCapabilities() - Returns:
- the image capabilities of all back buffers (intermediate buffers are considered back buffers)
 
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isPageFlippingpublic boolean isPageFlipping() - Returns:
- whether or not the buffer strategy uses page flipping; a set of
 buffers that uses page flipping
 can swap the contents internally between the front buffer and one or
 more back buffers by switching the video pointer (or by copying memory
 internally).  A non-flipping set of
 buffers uses blitting to copy the contents from one buffer to
 another; when this is the case, getFlipContentsreturnsnull
 
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getFlipContentspublic BufferCapabilities.FlipContents getFlipContents() - Returns:
- the resulting contents of the back buffer after page-flipping.
 This value is nullwhen theisPageFlippingreturnsfalse, implying blitting. It can be one ofFlipContents.UNDEFINED(the assumed default),FlipContents.BACKGROUND,FlipContents.PRIOR, orFlipContents.COPIED.
- See Also:
- isPageFlipping(),- BufferCapabilities.FlipContents.UNDEFINED,- BufferCapabilities.FlipContents.BACKGROUND,- BufferCapabilities.FlipContents.PRIOR,- BufferCapabilities.FlipContents.COPIED
 
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isFullScreenRequiredpublic boolean isFullScreenRequired() - Returns:
- whether page flipping is only available in full-screen mode.  If this
 is true, full-screen exclusive mode is required for page-flipping.
- See Also:
- isPageFlipping(),- GraphicsDevice.setFullScreenWindow(java.awt.Window)
 
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isMultiBufferAvailablepublic boolean isMultiBufferAvailable() - Returns:
- whether or not page flipping can be performed using more than two buffers (one or more intermediate buffers as well as the front and back buffer).
- See Also:
- isPageFlipping()
 
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clonepublic Object clone() Description copied from class:ObjectCreates and returns a copy of this object. The precise meaning of "copy" may depend on the class of the object. The general intent is that, for any objectx, the expression:
 will be true, and that the expression:x.clone() != x 
 will bex.clone().getClass() == x.getClass() true, but these are not absolute requirements. While it is typically the case that:
 will bex.clone().equals(x) true, this is not an absolute requirement.By convention, the returned object should be obtained by calling super.clone. If a class and all of its superclasses (exceptObject) obey this convention, it will be the case thatx.clone().getClass() == x.getClass().By convention, the object returned by this method should be independent of this object (which is being cloned). To achieve this independence, it may be necessary to modify one or more fields of the object returned by super.clonebefore returning it. Typically, this means copying any mutable objects that comprise the internal "deep structure" of the object being cloned and replacing the references to these objects with references to the copies. If a class contains only primitive fields or references to immutable objects, then it is usually the case that no fields in the object returned bysuper.cloneneed to be modified.The method clonefor classObjectperforms a specific cloning operation. First, if the class of this object does not implement the interfaceCloneable, then aCloneNotSupportedExceptionis thrown. Note that all arrays are considered to implement the interfaceCloneableand that the return type of theclonemethod of an array typeT[]isT[]where T is any reference or primitive type. Otherwise, this method creates a new instance of the class of this object and initializes all its fields with exactly the contents of the corresponding fields of this object, as if by assignment; the contents of the fields are not themselves cloned. Thus, this method performs a "shallow copy" of this object, not a "deep copy" operation.The class Objectdoes not itself implement the interfaceCloneable, so calling theclonemethod on an object whose class isObjectwill result in throwing an exception at run time.
 
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