Class PngChunk
java.lang.Object
org.apache.commons.imaging.common.BinaryFileParser
org.apache.commons.imaging.formats.png.chunks.PngChunk
- Direct Known Subclasses:
PngChunkGama
,PngChunkIccp
,PngChunkIdat
,PngChunkIhdr
,PngChunkPhys
,PngChunkPlte
,PngChunkScal
,PngTextChunk
A PNG image is composed of several chunks. This is the base class for the chunks,
used by the parser.
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Field Summary
FieldsModifier and TypeFieldDescriptionfinal boolean
private final byte[]
final int
final int
final boolean
final int
private final boolean[]
final boolean
final boolean
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionbyte[]
getBytes()
Return a copy of the chunk bytes.protected ByteArrayInputStream
Create and return aByteArrayInputStream
for the chunk bytes.boolean[]
Return a copy of the chunk property bits.Methods inherited from class org.apache.commons.imaging.common.BinaryFileParser
debugNumber, debugNumber, getByteOrder, setByteOrder
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Field Details
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length
public final int length -
chunkType
public final int chunkType -
crc
public final int crc -
bytes
private final byte[] bytes -
propertyBits
private final boolean[] propertyBits -
ancillary
public final boolean ancillary -
isPrivate
public final boolean isPrivate -
reserved
public final boolean reserved -
safeToCopy
public final boolean safeToCopy
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Constructor Details
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PngChunk
public PngChunk(int length, int chunkType, int crc, byte[] bytes) Constructor.- Parameters:
length
- chunk lengthchunkType
- chunk typecrc
- CRC computed over the chunk type and chunk data (but not the length)bytes
- chunk data bytes
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Method Details
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getBytes
public byte[] getBytes()Return a copy of the chunk bytes.- Returns:
- the chunk bytes
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getPropertyBits
public boolean[] getPropertyBits()Return a copy of the chunk property bits.- Returns:
- the chunk property bits
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getDataStream
Create and return aByteArrayInputStream
for the chunk bytes.The caller is responsible for closing the resource.
- Returns:
- a ByteArrayInputStream for the chunk bytes
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