JOGL 2.3.2 · jogamp.opengl.util.pngj.chunks.ChunkHelper

Field Summary

Modifier and Type	Field and Description
public static final byte[]	b_IDAT
public static final byte[]	b_IEND
public static final byte[]	b_IHDR
public static final byte[]	b_PLTE
public static final String	bKGD
public static final String	cHRM
private static final ThreadLocal<Deflater>	deflaterProvider
public static final String	gAMA
public static final String	hIST
public static final String	iCCP
public static final String	IDAT
public static final String	IEND
public static final String	IHDR
private static final ThreadLocal<Inflater>	inflaterProvider
public static final String	iTXt
public static final String	pHYs
public static final String	PLTE
public static final String	sBIT
public static final String	sPLT
public static final String	sRGB
public static final String	tEXt
public static final String	tIME
private static byte[]	tmpbuffer
public static final String	tRNS
public static final String	zTXt

Constructor Summary

Access	Constructor and Description
public	ChunkHelper()

Method Summary

Modifier and Type	Method and Description
public static final byte[]	compressBytes(final byte[] ori, final boolean compress)
public static byte[]	compressBytes(final byte[] ori, final int offset, final int len, final boolean compress)
public static final boolean	Returns: true if "equivalent" equivalent(final PngChunk c1, final PngChunk c2) MY adhoc criteria: two chunks are "equivalent" ("practically equal") if they have same id and (perhaps, if multiple are allowed) if the match also in some "internal key" (eg: key for string values, palette for sPLT, etc) Notice that the use of this is optional, and that the PNG standard allows Text chunks that have same key
public static List<PngChunk>	filterList(final List<PngChunk> target, final ChunkPredicate predicateKeep) Returns only the chunks that "match" the predicate See also trimList()
public static Deflater	getDeflater() thread-local deflater, just reset : this should be only used for short individual chunks decompression
public static Inflater	getInflater() thread-local inflater, just reset : this should be only used for short individual chunks compression
public static boolean	isCritical(final String id) critical chunk : first letter is uppercase
public static boolean	isPublic(final String id) public chunk: second letter is uppercase
public static boolean	isSafeToCopy(final String id) Safe to copy chunk: fourth letter is lower case
public static boolean	isText(final PngChunk c)
public static boolean	isUnknown(final PngChunk c) "Unknown" just means that our chunk factory (even when it has been augmented by client code) did not recognize its id
public static boolean	maskMatch(final int v, final int mask)
public static int	Returns: -1 if not found posNullByte(final byte[] b) Finds position of null byte in array
public static boolean	Returns: true/false shouldLoad(final String id, final ChunkLoadBehaviour behav) Decides if a chunk should be loaded, according to a ChunkLoadBehaviour
private static void	shovelInToOut(final InputStream in, final OutputStream out) Shovels all data from an input stream to an output stream.
public static byte[]	toBytes(final String x) Converts to bytes using Latin1 (ISO-8859-1)
public static byte[]	toBytesUTF8(final String x) Converts to bytes using UTF-8
public static String	toString(final byte[] x) Converts to String using Latin1 (ISO-8859-1)
public static String	toString(final byte[] x, final int offset, final int len) Converts to String using Latin1 (ISO-8859-1)
public static String	toStringUTF8(final byte[] x) Converts to string using UTF-8
public static String	toStringUTF8(final byte[] x, final int offset, final int len) Converts to string using UTF-8
public static int	trimList(final List<PngChunk> target, final ChunkPredicate predicateRemove) Remove (in place) the chunks that "match" the predicate See also filterList

Inherited from java.lang.Object:: clone equals finalize getClass hashCode notify notifyAll toString wait wait wait

Field Detail

b_IDAT	back to summary
public static final byte[] b_IDAT

b_IEND	back to summary
public static final byte[] b_IEND

b_IHDR	back to summary
public static final byte[] b_IHDR

b_PLTE	back to summary
public static final byte[] b_PLTE

bKGD	back to summary
public static final String bKGD

cHRM	back to summary
public static final String cHRM

deflaterProvider	back to summary
private static final ThreadLocal<Deflater> deflaterProvider

gAMA	back to summary
public static final String gAMA

hIST	back to summary
public static final String hIST

iCCP	back to summary
public static final String iCCP

IDAT	back to summary
public static final String IDAT

IEND	back to summary
public static final String IEND

IHDR	back to summary
public static final String IHDR

inflaterProvider	back to summary
private static final ThreadLocal<Inflater> inflaterProvider

iTXt	back to summary
public static final String iTXt

pHYs	back to summary
public static final String pHYs

PLTE	back to summary
public static final String PLTE

sBIT	back to summary
public static final String sBIT

sPLT	back to summary
public static final String sPLT

sRGB	back to summary
public static final String sRGB

tEXt	back to summary
public static final String tEXt

tIME	back to summary
public static final String tIME

tmpbuffer	back to summary
private static byte[] tmpbuffer

tRNS	back to summary
public static final String tRNS

zTXt	back to summary
public static final String zTXt

Constructor Detail

ChunkHelper	back to summary
public ChunkHelper()

Method Detail

compressBytes	back to summary
public static final byte[] compressBytes(final byte[] ori, final boolean compress)

compressBytes	back to summary
public static byte[] compressBytes(final byte[] ori, final int offset, final int len, final boolean compress)

equivalent	back to summary
public static final boolean equivalent(final PngChunk c1, final PngChunk c2) MY adhoc criteria: two chunks are "equivalent" ("practically equal") if they have same id and (perhaps, if multiple are allowed) if the match also in some "internal key" (eg: key for string values, palette for sPLT, etc) Notice that the use of this is optional, and that the PNG standard allows Text chunks that have same key Returns:boolean true if "equivalent"

equivalent

back to summary

public static final boolean equivalent(final PngChunk c1, final PngChunk c2)

MY adhoc criteria: two chunks are "equivalent" ("practically equal") if they have same id and (perhaps, if multiple are allowed) if the match also in some "internal key" (eg: key for string values, palette for sPLT, etc) Notice that the use of this is optional, and that the PNG standard allows Text chunks that have same key

Returns:boolean: true if "equivalent"

filterList	back to summary
public static List<PngChunk> filterList(final List<PngChunk> target, final ChunkPredicate predicateKeep) Returns only the chunks that "match" the predicate See also trimList()

getDeflater	back to summary
public static Deflater getDeflater() thread-local deflater, just reset : this should be only used for short individual chunks decompression

getInflater	back to summary
public static Inflater getInflater() thread-local inflater, just reset : this should be only used for short individual chunks compression

isCritical	back to summary
public static boolean isCritical(final String id) critical chunk : first letter is uppercase

isPublic	back to summary
public static boolean isPublic(final String id) public chunk: second letter is uppercase

isSafeToCopy	back to summary
public static boolean isSafeToCopy(final String id) Safe to copy chunk: fourth letter is lower case

isText	back to summary
public static boolean isText(final PngChunk c)

isUnknown	back to summary
public static boolean isUnknown(final PngChunk c) "Unknown" just means that our chunk factory (even when it has been augmented by client code) did not recognize its id

maskMatch	back to summary
public static boolean maskMatch(final int v, final int mask)

posNullByte	back to summary
public static int posNullByte(final byte[] b) Finds position of null byte in array Returns:int -1 if not found

posNullByte

back to summary

public static int posNullByte(final byte[] b)

Finds position of null byte in array

Returns:int: -1 if not found

shouldLoad	back to summary
public static boolean shouldLoad(final String id, final ChunkLoadBehaviour behav) Decides if a chunk should be loaded, according to a ChunkLoadBehaviour Returns:boolean true/false

shouldLoad

back to summary

public static boolean shouldLoad(final String id, final ChunkLoadBehaviour behav)

Decides if a chunk should be loaded, according to a ChunkLoadBehaviour

Returns:boolean: true/false

shovelInToOut	back to summary
private static void shovelInToOut(final InputStream in, final OutputStream out) throws IOException Shovels all data from an input stream to an output stream.

toBytes	back to summary
public static byte[] toBytes(final String x) Converts to bytes using Latin1 (ISO-8859-1)

toBytesUTF8	back to summary
public static byte[] toBytesUTF8(final String x) Converts to bytes using UTF-8

toString	back to summary
public static String toString(final byte[] x) Converts to String using Latin1 (ISO-8859-1)

toString	back to summary
public static String toString(final byte[] x, final int offset, final int len) Converts to String using Latin1 (ISO-8859-1)

toStringUTF8	back to summary
public static String toStringUTF8(final byte[] x) Converts to string using UTF-8

toStringUTF8	back to summary
public static String toStringUTF8(final byte[] x, final int offset, final int len) Converts to string using UTF-8

trimList	back to summary
public static int trimList(final List<PngChunk> target, final ChunkPredicate predicateRemove) Remove (in place) the chunks that "match" the predicate See also filterList

public Class ChunkHelper

Field Summary

Constructor Summary

Method Summary

Field Detail

Constructor Detail

Method Detail