Class PngChunk
java.lang.Object
org.apache.commons.imaging.common.BinaryFileParser
org.apache.commons.imaging.formats.png.chunks.PngChunk
- Direct Known Subclasses:
AbstractPngTextChunk
,PngChunkGama
,PngChunkIccp
,PngChunkIdat
,PngChunkIhdr
,PngChunkPhys
,PngChunkPlte
,PngChunkScal
A PNG image is composed of several chunks. This is the base class for the chunks, used by the parser.
- See Also:
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Constructor Summary
ConstructorsConstructorDescriptionPngChunk
(int length, int chunkType, int crc, byte[] bytes) Constructs a new instance. -
Method Summary
Modifier and TypeMethodDescriptionbyte[]
getBytes()
Gets a copy of the chunk bytes.int
int
getCrc()
protected ByteArrayInputStream
Gets a newByteArrayInputStream
for the chunk bytes.int
boolean[]
Gets a copy of the chunk property bits.boolean
boolean
boolean
boolean
Methods inherited from class org.apache.commons.imaging.common.BinaryFileParser
debugNumber, debugNumber, getByteOrder, setByteOrder
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Constructor Details
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PngChunk
Constructs a new instance.- Parameters:
length
- chunk length.chunkType
- chunk type.crc
- CRC computed over the chunk type and chunk data (but not the length).bytes
- chunk data bytes.- Throws:
NullPointerException
- ifbytes
is null.
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Method Details
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getBytes
Gets a copy of the chunk bytes.- Returns:
- the chunk bytes
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getChunkType
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getCrc
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getDataStream
Gets a newByteArrayInputStream
for the chunk bytes.The caller is responsible for closing the resource.
- Returns:
- a ByteArrayInputStream for the chunk bytes
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getLength
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getPropertyBits
Gets a copy of the chunk property bits.- Returns:
- the chunk property bits
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isAncillary
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isPrivate
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isReserved
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isSafeToCopy
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