Package net.mtrop.doom.graphics

Class Colormap

java.lang.Object

net.mtrop.doom.graphics.Colormap

All Implemented Interfaces:

BinaryObject

public class Colormap
extends Object
implements BinaryObject

This is a single entry that indexes the palette indices for color lookup. The COLORMAP lump contains several of these. Other commercial IWAD lumps that are colormaps or contain many colormaps are the TRANTBL lumps in Hexen and TINTTAB.

Author:

Matthew Tropiano

Nested Class Summary

Nested classes/interfaces inherited from interface net.mtrop.doom.object.BinaryObject

BinaryObject.InlineScanner<BO extends BinaryObject>, BinaryObject.Reflect, BinaryObject.Scanner<BO extends BinaryObject>, BinaryObject.Shared, BinaryObject.Transformer<BO extends BinaryObject>

Field Summary

Fields

Modifier and Type	Field	Description
protected int[]	indices	The index list in this map.
static final int	LENGTH	A single colormap's length in bytes.
static final int	NUM_INDICES	The number of total indices in a standard Doom color map.

Constructor Summary

Constructors

Constructor	Description
Colormap()	Creates a new identity colormap where all indices point to their own index.
Colormap(Colormap map)	Creates a new colormap by copying the contents of another.

Method Summary

Modifier and Type	Method	Description
Colormap	copy()	Creates a new colormap by copying the contents of this one.
static Colormap	createIdentityMap()	Creates a color map where each color is mapped to its own index (index 0 is palette color 0 ...
int	getPaletteIndex(int index)	Returns the palette index of a specific index in the map.
void	readBytes(InputStream in)	Reads from an InputStream and sets this object's fields.
Colormap	setIdentity()	Resets the color map to where each color is mapped to its own index (index 0 is palette color 0 ...
Colormap	setPaletteIndex(int index, int paletteIndex)	Sets the palette index of a specific index in the map.
Colormap	setTranslation(int startIndex, int endIndex, int startValue, int endValue)	Sets a colormap translation by remapping groups of contiguous indices.
String	toString()
void	writeBytes(OutputStream out)	Writes this object to an OutputStream.

Methods inherited from class java.lang.Object

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

Methods inherited from interface net.mtrop.doom.object.BinaryObject

fromBytes, readFile, toBytes, writeFile, writeFile

Field Details

LENGTH

public static final int LENGTH

A single colormap's length in bytes.

See Also:

• Constant Field Values

NUM_INDICES

public static final int NUM_INDICES

The number of total indices in a standard Doom color map.

See Also:

• Constant Field Values

indices

protected int[] indices

The index list in this map.

Constructor Details

Colormap

public Colormap()

Creates a new identity colormap where all indices point to their own index.

Colormap

public Colormap(Colormap map)

Creates a new colormap by copying the contents of another.

Parameters:

map - the source map to copy.

Method Details

createIdentityMap

public static Colormap createIdentityMap()

Creates a color map where each color is mapped to its own index (index 0 is palette color 0 ... index 255 is palette color 255).

Returns:

a new color map with the specified indices already mapped.

setIdentity

public Colormap setIdentity()

Resets the color map to where each color is mapped to its own index (index 0 is palette color 0 ... index 255 is palette color 255).

Returns:

itself, to chain colormap calls.

setTranslation

public Colormap setTranslation(int startIndex,
 int endIndex,
 int startValue,
 int endValue)

Sets a colormap translation by remapping groups of contiguous indices.

Parameters:

startIndex - the starting replacement index (inclusive).

endIndex - the ending replacement index (inclusive).

startValue - the starting replacement value (inclusive).

endValue - the ending replacement value (inclusive).

Returns:

itself, to chain colormap calls.

copy

public Colormap copy()

Creates a new colormap by copying the contents of this one.

Returns:

itself, to chain colormap calls.

getPaletteIndex

public int getPaletteIndex(int index)

Returns the palette index of a specific index in the map.

Parameters:

index - the index number of the entry.

Returns:

the corresponding palette index.

Throws:

ArrayIndexOutOfBoundsException - if index is greater than NUM_INDICES or less than 0.

setPaletteIndex

public Colormap setPaletteIndex(int index,
 int paletteIndex)

Sets the palette index of a specific index in the map.

Parameters:

index - the index number of the entry.

paletteIndex - the new index.

Returns:

itself, to chain colormap calls.

Throws:

ArrayIndexOutOfBoundsException - if index is greater than 255 or less than 0.

IllegalArgumentException - if paletteIndex is less than 0 or greater than 255.

readBytes

public void readBytes(InputStream in)
               throws IOException

Description copied from interface: BinaryObject

Reads from an InputStream and sets this object's fields. Only reads the amount of bytes that it takes to read a single instance of the object. Note that not every object may have a consistent length!

Specified by:

readBytes in interface BinaryObject

Parameters:

in - the InputStream to read from.

Throws:

IOException - if a read error occurs.

writeBytes

public void writeBytes(OutputStream out)
                throws IOException

Description copied from interface: BinaryObject

Writes this object to an OutputStream.

Specified by:

writeBytes in interface BinaryObject

Parameters:

out - the OutputStream to write to.

Throws:

IOException - if a write error occurs.

toString

public String toString()

Overrides:

toString in class Object