public class GIFReader extends FormatReader
Modifier and Type | Field and Description |
---|---|
private int[] |
act
Active color table.
|
private int |
blockSize
Block size.
|
private java.util.Vector<int[]> |
colorTables |
private byte[] |
dBlock
Current data block.
|
private int |
dispose |
private static int |
END |
private static int |
EXTENSION |
private int[] |
gct
Global color table.
|
static java.lang.String |
GIF_MAGIC_STRING |
private static int |
GRAPHICS |
private int |
ih
Current image rectangle.
|
private static int |
IMAGE_SEPARATOR |
private java.util.Vector<byte[]> |
images |
private boolean |
interlace
Interlace flag.
|
private int |
iw
Current image rectangle.
|
private int |
ix
Current image rectangle.
|
private int |
iy
Current image rectangle.
|
private int |
lastDispose |
private static int |
MAX_STACK_SIZE
Maximum buffer size.
|
private byte[] |
pixels |
private byte[] |
pixelStack |
private java.util.Set<java.lang.Integer> |
planesRead |
private short[] |
prefix |
private byte[] |
suffix |
private int |
transIndex
Transparent color index.
|
private boolean |
transparency
Use transparent color.
|
core, coreIndex, datasetDescription, domains, filterMetadata, flattenedResolutions, group, hasCompanionFiles, in, indexedAsRGB, metadata, metadataStore, normalizeData, resolution, saveOriginalMetadata, series, suffixNecessary, suffixSufficient, THUMBNAIL_DIMENSION
COMPRESSION_SUFFIXES, currentId, format, LOGGER, metadataOptions, suffixes
CAN_GROUP, CANNOT_GROUP, MUST_GROUP
Constructor and Description |
---|
GIFReader()
Constructs a new GIF reader.
|
Modifier and Type | Method and Description |
---|---|
void |
close(boolean fileOnly)
Closes the currently open file.
|
private void |
decodeImageData()
Decodes LZW image data into a pixel array.
|
byte[][] |
get8BitLookupTable()
Gets the 8-bit color lookup table associated with
the most recently opened image.
|
protected void |
initFile(java.lang.String id)
Initializes the given file (parsing header information, etc.).
|
boolean |
isThisType(loci.common.RandomAccessInputStream stream)
Checks if the given stream is a valid stream for this file format.
|
byte[] |
openBytes(int no,
byte[] buf,
int x,
int y,
int w,
int h)
Obtains a sub-image of the specified image plane
into a pre-allocated byte array.
|
private int |
readBlock()
Reads the next variable length block.
|
private void |
readImageBlock() |
private int[] |
readLut(int size)
Read a color lookup table of the specified size.
|
private void |
setPixels() |
private void |
skipBlocks() |
addGlobalMeta, addGlobalMeta, addGlobalMeta, addGlobalMeta, addGlobalMeta, addGlobalMeta, addGlobalMeta, addGlobalMeta, addGlobalMeta, addGlobalMetaList, addMeta, addMetaList, addSeriesMeta, addSeriesMeta, addSeriesMeta, addSeriesMeta, addSeriesMeta, addSeriesMeta, addSeriesMeta, addSeriesMeta, addSeriesMeta, addSeriesMetaList, close, coreIndexToSeries, fileGroupOption, flattenHashtables, get16BitLookupTable, getAcquisitionMode, getAdvancedSeriesUsedFiles, getAdvancedUsedFiles, getArcType, getBinning, getBitsPerPixel, getCompression, getContrastMethod, getCoreIndex, getCoreMetadataList, getCorrection, getCurrentCore, getCurrentFile, getDatasetStructureDescription, getDetectorType, getDimensionOrder, getDimensionOrder, getDomains, getEffectiveSizeC, getExperimentType, getFilamentType, getFillRule, getFilterType, getFontFamily, getFontStyle, getGlobalMeta, getGlobalMetadata, getIlluminationType, getImageCount, getImmersion, getIndex, getIndex, getLaserMedium, getLaserType, getMarker, getMedium, getMetadataStore, getMetadataStoreRoot, getMetadataValue, getMicrobeamManipulationType, getMicroscopeType, getModuloC, getModuloT, getModuloZ, getNamingConvention, getOptimalTileHeight, getOptimalTileWidth, getPixelType, getPixelType, getPossibleDomains, getPulse, getRequiredDirectories, getResolution, getResolutionCount, getRGBChannelCount, getRotationTransform, getSeries, getSeriesCount, getSeriesMeta, getSeriesMetadata, getSeriesMetadataValue, getSeriesUsedFiles, getSeriesUsedFiles, getSizeC, getSizeT, getSizeX, getSizeY, getSizeZ, getThumbSizeX, getThumbSizeY, getUnderlyingReaders, getUsedFiles, getUsedFiles, getZCTCoords, getZCTModuloCoords, hasCompanionFiles, hasFlattenedResolutions, isFalseColor, isGroupFiles, isIndexed, isInterleaved, isInterleaved, isLittleEndian, isMetadataComplete, isMetadataFiltered, isNormalized, isOrderCertain, isOriginalMetadataPopulated, isRGB, isSingleFile, isThisType, isThisType, isThisType, isThumbnailSeries, isUsedFile, makeFilterMetadata, openBytes, openBytes, openBytes, openPlane, openThumbBytes, readPlane, readPlane, reopenFile, seriesToCoreIndex, setCoreIndex, setFlattenedResolutions, setGroupFiles, setId, setMetadataFiltered, setMetadataStore, setNormalized, setOriginalMetadataPopulated, setResolution, setSeries, updateMetadataLists
checkSuffix, checkSuffix, getFormat, getMetadataOptions, getNativeDataType, getSuffixes, getSupportedMetadataLevels, setMetadataOptions
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
getFormat, getNativeDataType, getSuffixes
getMetadataOptions, getSupportedMetadataLevels, setMetadataOptions
public static final java.lang.String GIF_MAGIC_STRING
private static final int MAX_STACK_SIZE
private static final int IMAGE_SEPARATOR
private static final int EXTENSION
private static final int END
private static final int GRAPHICS
private int[] gct
private int[] act
private boolean interlace
private int ix
private int iy
private int iw
private int ih
private byte[] dBlock
private int blockSize
private int dispose
private int lastDispose
private boolean transparency
private int transIndex
private short[] prefix
private byte[] suffix
private byte[] pixelStack
private byte[] pixels
private java.util.Vector<byte[]> images
private java.util.Vector<int[]> colorTables
private transient java.util.Set<java.lang.Integer> planesRead
public boolean isThisType(loci.common.RandomAccessInputStream stream) throws java.io.IOException
IFormatReader
isThisType
in interface IFormatReader
isThisType
in class FormatReader
stream
- A RandomAccessInputStream representing the file to check.
The first byte in the stream is assumed to be the first byte
in the file.java.io.IOException
public byte[][] get8BitLookupTable() throws FormatException, java.io.IOException
IFormatReader
IFormatReader.isIndexed()
returns
false, then this may return null. Also, if IFormatReader.getPixelType()
returns
anything other than FormatTools.INT8
or FormatTools.UINT8
,
this method will return null.get8BitLookupTable
in interface IFormatReader
get8BitLookupTable
in class FormatReader
FormatException
java.io.IOException
public byte[] openBytes(int no, byte[] buf, int x, int y, int w, int h) throws FormatException, java.io.IOException
IFormatReader
openBytes
in interface IFormatReader
openBytes
in class FormatReader
no
- the image index within the file.buf
- a pre-allocated buffer.x
- X coordinate of the upper-left corner of the sub-imagey
- Y coordinate of the upper-left corner of the sub-imagew
- width of the sub-imageh
- height of the sub-imagebuf
for convenience.FormatException
- if there was a problem parsing the metadata of the
file.java.io.IOException
- if there was a problem reading the file.IFormatReader.openBytes(int, byte[], int, int, int, int)
public void close(boolean fileOnly) throws java.io.IOException
IFormatReader
Closeable.close()
.close
in interface IFormatReader
close
in class FormatReader
java.io.IOException
protected void initFile(java.lang.String id) throws FormatException, java.io.IOException
FormatReader
initFile
in class FormatReader
FormatException
- if a parsing error occurs processing the file.java.io.IOException
- if an I/O error occurs processing the fileprivate int readBlock() throws java.io.IOException
java.io.IOException
private void decodeImageData() throws java.io.IOException
java.io.IOException
private void setPixels()
private void skipBlocks() throws java.io.IOException
java.io.IOException
private void readImageBlock() throws FormatException, java.io.IOException
FormatException
java.io.IOException
private int[] readLut(int size) throws FormatException
FormatException
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