public Class OffScreenImage

Class Inheritance

Imports

java.awt.Component, .Color, .SystemColor, .Font, .Graphics, .Graphics2D, .GraphicsEnvironment, java.awt.image.BufferedImage, .ImageProducer, .ColorModel, .WritableRaster, sun.java2d.SunGraphics2D, .SurfaceData

This is a special variant of BufferedImage that keeps a reference to a Component. The Component's foreground and background colors and default font are used as the defaults for this image.

Field Summary

Modifier and Type	Field and Description
protected Component	c
private Font	defaultFont
private OffScreenImageSource	osis Hides java.awt.image.BufferedImage.osis.

Inherited from java.awt.image.BufferedImage:: TYPE_3BYTE_BGR TYPE_4BYTE_ABGR TYPE_4BYTE_ABGR_PRE TYPE_BYTE_BINARY TYPE_BYTE_GRAY TYPE_BYTE_INDEXED TYPE_CUSTOM TYPE_INT_ARGB TYPE_INT_ARGB_PRE TYPE_INT_BGR TYPE_INT_RGB TYPE_USHORT_555_RGB TYPE_USHORT_565_RGB TYPE_USHORT_GRAY

Constructor Summary

Access	Constructor and Description
public	OffScreenImage(Component c, ColorModel cm, WritableRaster raster, boolean isRasterPremultiplied) Constructs an OffScreenImage given a color model and tile, for offscreen rendering to be used with a given component.

Method Summary

Modifier and Type	Method and Description
public Graphics2D	createGraphics() Overrides java.awt.image.BufferedImage.createGraphics. Creates a `Graphics2D`, which can be used to draw into this `BufferedImage`.
public Graphics	getGraphics() Overrides java.awt.image.BufferedImage.getGraphics. This method returns a `Graphics2D`, but is here for backwards compatibility.
public ImageProducer	getSource() Overrides java.awt.image.BufferedImage.getSource. Returns the object that produces the pixels for the image.
private void	initSurface(int width, int height)

Field Detail

c	back to summary
protected Component c

defaultFont	back to summary
private Font defaultFont

osis	back to summary
private OffScreenImageSource osis Hides java.awt.image.BufferedImage.osis.

Constructor Detail

OffScreenImage	back to summary
public OffScreenImage(Component c, ColorModel cm, WritableRaster raster, boolean isRasterPremultiplied) Constructs an OffScreenImage given a color model and tile, for offscreen rendering to be used with a given component. The component is used to obtain the foreground color, background color and font.

Method Detail

createGraphics back to summary

createGraphics	back to summary
public Graphics2D createGraphics() Overrides java.awt.image.BufferedImage.createGraphics. Doc from java.awt.image.BufferedImage.createGraphics. Creates a `Graphics2D`, which can be used to draw into this `BufferedImage`.

public Graphics2D createGraphics()

Overrides java.awt.image.BufferedImage.createGraphics.

Doc from java.awt.image.BufferedImage.createGraphics.

Creates a Graphics2D, which can be used to draw into this BufferedImage.

getGraphics back to summary

getGraphics	back to summary
public Graphics getGraphics() Overrides java.awt.image.BufferedImage.getGraphics. Doc from java.awt.image.BufferedImage.getGraphics. This method returns a `Graphics2D`, but is here for backwards compatibility. `createGraphics` is more convenient, since it is declared to return a `Graphics2D`.

public Graphics getGraphics()

Overrides java.awt.image.BufferedImage.getGraphics.

Doc from java.awt.image.BufferedImage.getGraphics.

This method returns a Graphics2D, but is here for backwards compatibility. createGraphics is more convenient, since it is declared to return a Graphics2D.

getSource	back to summary
public ImageProducer getSource() Overrides java.awt.image.BufferedImage.getSource. Doc from java.awt.image.BufferedImage.getSource. Returns the object that produces the pixels for the image.

getSource

back to summary

public ImageProducer getSource()

Overrides java.awt.image.BufferedImage.getSource.

Doc from java.awt.image.BufferedImage.getSource.

Returns the object that produces the pixels for the image.

initSurface	back to summary
private void initSurface(int width, int height)