Class PNGDecoder

java.lang.Object

zombie.core.textures.PNGDecoder

public final class PNGDecoder
extends Object

A PNGDecoder. The slick PNG decoder is based on this class :)

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static enum	PNGDecoder.Format

Field Summary

Fields

Modifier and Type	Field	Description
boolean	bDoMask
static final int	fdAT
static final int	IDAT
BooleanGrid	mask
int	maskID
long	readTotal

Constructor Summary

Constructors

Constructor	Description
PNGDecoder(InputStream _input, boolean _bDoMask)

Method Summary

Modifier and Type	Method	Description
PNGDecoder.Format	decideTextureFormat(PNGDecoder.Format fmt)	Computes the implemented format conversion for the desired format.
void	decode(ByteBuffer byteBuffer, int int5, int int3, PNGDecoder.Format format, int int4)
void	decodeFlipped(ByteBuffer byteBuffer, int int0, int int3, PNGDecoder.Format format, int int4)
void	decodeFrame(ByteBuffer byteBuffer, int int0, PNGDecoder.Format format)
void	decodeStartOfNextFrame()
APNGFrame	getCurrentFrame()
int	getHeight()
int	getNumFrames()
int	getNumPlays()
int	getWidth()
boolean	hasAlpha()	Checks if the image has transparency information either from an alpha channel or from a tRNS chunk.
boolean	hasAlphaChannel()	Checks if the image has a real alpha channel.
boolean	isAnimated()
boolean	isRGB()
void	overwriteTRNS(byte r, byte g, byte b)	Overwrites the tRNS chunk entry to make a selected color transparent.

Methods inherited from class java.lang.Object

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

Field Details

IDAT

public static final int IDAT

See Also:

• Constant Field Values

fdAT

public static final int fdAT

See Also:

• Constant Field Values

maskID

public int maskID

mask

public BooleanGrid mask

bDoMask

public boolean bDoMask

readTotal

public long readTotal

Constructor Details

PNGDecoder

public PNGDecoder(InputStream _input,
 boolean _bDoMask)
           throws IOException

Throws:

IOException

Method Details

getHeight

public int getHeight()

getWidth

public int getWidth()

hasAlphaChannel

public boolean hasAlphaChannel()

Checks if the image has a real alpha channel. This method does not check for the presence of a tRNS chunk.

Returns:

true if the image has an alpha channel

hasAlpha

public boolean hasAlpha()

Checks if the image has transparency information either from an alpha channel or from a tRNS chunk.

Returns:

true if the image has transparency

isRGB

public boolean isRGB()

isAnimated

public boolean isAnimated()

getNumFrames

public int getNumFrames()

getNumPlays

public int getNumPlays()

getCurrentFrame

public APNGFrame getCurrentFrame()

overwriteTRNS

public void overwriteTRNS(byte r,
 byte g,
 byte b)

Overwrites the tRNS chunk entry to make a selected color transparent.

Parameters:

r - the red component of the color to make transparent

g - the green component of the color to make transparent

b - the blue component of the color to make transparent

decideTextureFormat

public PNGDecoder.Format decideTextureFormat(PNGDecoder.Format fmt)

Computes the implemented format conversion for the desired format.

Parameters:

fmt - the desired format

Returns:

format which best matches the desired format

decode

public void decode(ByteBuffer byteBuffer,
 int int5,
 int int3,
 PNGDecoder.Format format,
 int int4)
            throws IOException

Throws:

IOException

decodeFlipped

public void decodeFlipped(ByteBuffer byteBuffer,
 int int0,
 int int3,
 PNGDecoder.Format format,
 int int4)
                   throws IOException

Throws:

IOException

decodeStartOfNextFrame

public void decodeStartOfNextFrame()
                            throws IOException

Throws:

IOException

decodeFrame

public void decodeFrame(ByteBuffer byteBuffer,
 int int0,
 PNGDecoder.Format format)
                 throws IOException

Throws:

IOException