webplugin.aclib.image.ico

Class AbstractBitmapIndexed

java.lang.Object

webplugin.aclib.image.ico.AbstractBitmap

webplugin.aclib.image.ico.AbstractBitmapIndexed

Direct Known Subclasses:

BitmapIndexed1BPP, BitmapIndexed4BPP, BitmapIndexed8BPP

public abstract class AbstractBitmapIndexed
extends AbstractBitmap

Parent class for indexed bitmaps (1, 4, and 8 bits per pixel). The value of a pixel refers to an entry in the color palette. The bitmap has a mask which is a 1 BPP bitmap specifiying whether a pixel is transparent or opaque.

Author:

© Christian Treber, ct@ctreber.com

Field Summary

Fields

Modifier and Type	Field and Description
protected int[]	_pixels The pixel values.

Fields inherited from class webplugin.aclib.image.ico.AbstractBitmap

_descriptor

Constructor Summary

Constructors

Constructor and Description
AbstractBitmapIndexed(BitmapDescriptor pDescriptor) Create a bitmap with a color table and a mask.

Method Summary

Methods

Modifier and Type	Method and Description
BufferedImage	createImageIndexed()
BufferedImage	createImageRGB() Create an RGB image rendition of this bitmap.
protected static int	getBytesPerScanLine(int pWidth, int pBPP) Return bytes per scan line rounded up to the next 4 byte boundary.
Color	getColor(int pIndex) Get the color for the specified color palette index.
Color	getColor(int pXPos, int pYPos) Get the color for the specified point.
int	getPaletteIndex(int pXPos, int pYPos) Index into the color palette for the specified point.
(package private) void	read(AbstractDecoder pDec) Needed to be replaced for indexed images because they contain a color palette and a mask which needs to be read as well.
(package private) abstract void	readBitmap(AbstractDecoder pDec) This functions is needed b/c all classes read the bitmap, but not always a color table and a mask.

Methods inherited from class webplugin.aclib.image.ico.AbstractBitmap

getColorCount, getDescriptor, getHeight, getWidth, setDescriptor, toString

Methods inherited from class java.lang.Object

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

Field Detail

_pixels

protected int[] _pixels

The pixel values. The value refers to an entry in the color palette.

Constructor Detail

AbstractBitmapIndexed

public AbstractBitmapIndexed(BitmapDescriptor pDescriptor)

Create a bitmap with a color table and a mask.

Parameters:

pDescriptor - The descriptor.

Method Detail

read

void read(AbstractDecoder pDec)
    throws IOException

Needed to be replaced for indexed images because they contain a color palette and a mask which needs to be read as well.

Specified by:

read in class AbstractBitmap

Parameters:

pDec - The decoder.

Throws:

IOException

readBitmap

abstract void readBitmap(AbstractDecoder pDec)
                  throws IOException

This functions is needed b/c all classes read the bitmap, but not always a color table and a mask.

Parameters:

pDec - The decoder.

Throws:

IOException

getBytesPerScanLine

protected static int getBytesPerScanLine(int pWidth,
                      int pBPP)

Return bytes per scan line rounded up to the next 4 byte boundary.

Parameters:

pWidth - The image width.

pBPP - Bytes per pixel.

Returns:

Bytes per scan line rounded up to the next 4 byte boundar.

createImageIndexed

public BufferedImage createImageIndexed()

Returns:

BufferedImage (palette) created from the indexed bitmap.

createImageRGB

public BufferedImage createImageRGB()

Description copied from class: AbstractBitmap

Create an RGB image rendition of this bitmap.

Specified by:

createImageRGB in class AbstractBitmap

Returns:

BufferedImage (ARGB) from the indexed bitmap.

getColor

public Color getColor(int pXPos,
             int pYPos)

Get the color for the specified point.

Parameters:

pXPos - The x position.

pYPos - The y position.

Returns:

Color of the selected point.

getPaletteIndex

public int getPaletteIndex(int pXPos,
                  int pYPos)

Index into the color palette for the specified point.

Parameters:

pXPos - The x position.

pYPos - The y position.

Returns:

Palette index for pixel x, y

getColor

public Color getColor(int pIndex)

Get the color for the specified color palette index.

Parameters:

pIndex - of the color requested.

Returns:

Requested color.