uk.ac.starlink.ttools.plot

Class GraphicsBitmap

java.lang.Object

uk.ac.starlink.ttools.plot.GraphicsBitmap

public class GraphicsBitmap
extends Object

Allows one to draw 1-bit graphcs onto a graphics context and to retrieve the resulting bitmap in the form of a Pixellator.

It took me ages slogging through the java.awt.image javadocs to work out how to get a graphics context backed by a primitive array buffer.

Since:

23 Aug 2007

Author:

Mark Taylor

Constructor Summary

Constructors

Constructor and Description
GraphicsBitmap(int width, int height) Constructor.

Method Summary

Modifier and Type	Method and Description
void	clear() Clears the bitmap.
Graphics2D	createGraphics() Returns a graphics context which can draw monochrome graphics on this bitmap.
Pixellator	createPixellator() Returns a pixellator which will iterate over the painted pixels in this bitmap.
Pixellator	createPixellator(Rectangle bounds) Returns a pixellator which will iterate over a sub-region of the painted pixels in this bitmap.
int	getHeight() Returns the height of this bitmap.
int	getWidth() Returns the width of this bitmap.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

GraphicsBitmap

public GraphicsBitmap(int width,
                      int height)

Constructor.

Parameters:

width - width of the bitmapped region

height - height of the bitmapped region

Method Detail

createGraphics

public Graphics2D createGraphics()

Returns a graphics context which can draw monochrome graphics on this bitmap.

Returns:

graphics context

clear

public void clear()

Clears the bitmap.

getWidth

public int getWidth()

Returns the width of this bitmap.

Returns:

width

getHeight

public int getHeight()

Returns the height of this bitmap.

Returns:

height

createPixellator

public Pixellator createPixellator()

Returns a pixellator which will iterate over the painted pixels in this bitmap. Pixels in the pixellator reflect the pixel state at iteration time.

Returns:

bitmap pixellator

createPixellator

public Pixellator createPixellator(Rectangle bounds)

Returns a pixellator which will iterate over a sub-region of the painted pixels in this bitmap. Pixels in the pixellator reflect the pixel state at iteration time.

Parameters:

bounds - region of space for which the pixellator is wanted

Returns:

bitmap subset pixellator