Class TIFFImageReadParam

java.lang.Object

javax.imageio.IIOParam

javax.imageio.ImageReadParam

javax.imageio.plugins.tiff.TIFFImageReadParam

public final class TIFFImageReadParam
extends ImageReadParam

A subclass of ImageReadParam allowing control over the TIFF reading process.

Because TIFF is an extensible format, the reader requires information about any tags used by TIFF extensions in order to emit meaningful metadata. Also, TIFF extensions may define new compression types. Both types of information about extensions may be provided by this interface.

Additional TIFF tags must be organized into TIFFTagSets. A TIFFTagSet may be provided to the reader by means of the addAllowedTagSet method. By default, the tag sets BaselineTIFFTagSet, FaxTIFFTagSet, ExifParentTIFFTagSet, and GeoTIFFTagSet are included.

Forcing reading of fields corresponding to TIFFTags not in any of the allowed TIFFTagSets may be effected via setReadUnknownTags.

Since:

9

Field Summary

Fields declared in class ImageReadParam

canSetSourceRenderSize, destination, destinationBands, minProgressivePass, numProgressivePasses, sourceRenderSize

Modifier and Type	Field	Description
protected boolean	canSetSourceRenderSize	true if this ImageReadParam allows the source rendering dimensions to be set.
protected BufferedImage	destination	The current destination BufferedImage, or null if none has been set.
protected int[]	destinationBands	The set of destination bands to be used, as an array of ints.
protected int	minProgressivePass	The minimum index of a progressive pass to read from the source.
protected int	numProgressivePasses	The maximum number of progressive passes to read from the source.
protected Dimension	sourceRenderSize	The desired rendering width and height of the source, if canSetSourceRenderSize is true, or null.

Fields declared in class IIOParam

controller, defaultController, destinationOffset, destinationType, sourceBands, sourceRegion, sourceXSubsampling, sourceYSubsampling, subsamplingXOffset, subsamplingYOffset

Modifier and Type	Field	Description
protected IIOParamController	controller	The IIOParamController that will be used to provide settings for this IIOParam object when the activateController method is called.
protected IIOParamController	defaultController	The default IIOParamController that will be used to provide settings for this IIOParam object when the activateController method is called.
protected Point	destinationOffset	The offset in the destination where the upper-left decoded pixel should be placed.
protected ImageTypeSpecifier	destinationType	An ImageTypeSpecifier to be used to generate a destination image when reading, or to set the output color type when writing.
protected int[]	sourceBands	An array of ints indicating which source bands will be used, or null.
protected Rectangle	sourceRegion	The source region, on null if none is set.
protected int	sourceXSubsampling	The decimation subsampling to be applied in the horizontal direction.
protected int	sourceYSubsampling	The decimation subsampling to be applied in the vertical direction.
protected int	subsamplingXOffset	A horizontal offset to be applied to the subsampling grid before subsampling.
protected int	subsamplingYOffset	A vertical offset to be applied to the subsampling grid before subsampling.

Constructor Summary

Constructors

Constructor	Description
TIFFImageReadParam()	Constructs a TIFFImageReadParam.

Method Summary

Modifier and Type	Method	Description
void	addAllowedTagSet(TIFFTagSet tagSet)	Adds a TIFFTagSet object to the list of allowed tag sets.
List<TIFFTagSet>	getAllowedTagSets()	Returns a List containing the allowed TIFFTagSet objects.
boolean	getReadUnknownTags()	Retrieve the setting of whether to read fields corresponding to unknown TIFFTags.
void	removeAllowedTagSet(TIFFTagSet tagSet)	Removes a TIFFTagSet object from the list of allowed tag sets.
void	setReadUnknownTags(boolean readUnknownTags)	Set whether to read fields corresponding to TIFFTags not in the allowed TIFFTagSets.

Methods declared in class ImageReadParam

canSetSourceRenderSize, getDestination, getDestinationBands, getSourceMaxProgressivePass, getSourceMinProgressivePass, getSourceNumProgressivePasses, getSourceRenderSize, setDestination, setDestinationBands, setSourceProgressivePasses, setSourceRenderSize

Modifier and Type	Method	Description
boolean	canSetSourceRenderSize()	Returns true if this reader allows the source image to be rendered at an arbitrary size as part of the decoding process, by means of the setSourceRenderSize method.
BufferedImage	getDestination()	Returns the BufferedImage currently set by the setDestination method, or null if none is set.
int[]	getDestinationBands()	Returns the set of band indices where data will be placed.
int	getSourceMaxProgressivePass()	If getSourceNumProgressivePasses is equal to Integer.MAX_VALUE, returns Integer.MAX_VALUE.
int	getSourceMinProgressivePass()	Returns the index of the first progressive pass that will be decoded.
int	getSourceNumProgressivePasses()	Returns the number of the progressive passes that will be decoded.
Dimension	getSourceRenderSize()	Returns the width and height of the source image as it will be rendered during decoding, if they have been set via the setSourceRenderSize method.
void	setDestination(BufferedImage destination)	Supplies a BufferedImage to be used as the destination for decoded pixel data.
void	setDestinationBands(int[] destinationBands)	Sets the indices of the destination bands where data will be placed.
void	setSourceProgressivePasses(int minPass, int numPasses)	Sets the range of progressive passes that will be decoded.
void	setSourceRenderSize(Dimension size)	If the image is able to be rendered at an arbitrary size, sets the source width and height to the supplied values.

Methods declared in class IIOParam

activateController, getController, getDefaultController, getDestinationOffset, getDestinationType, getSourceBands, getSourceRegion, getSourceXSubsampling, getSourceYSubsampling, getSubsamplingXOffset, getSubsamplingYOffset, hasController, setController, setDestinationOffset, setDestinationType, setSourceBands, setSourceRegion, setSourceSubsampling

Modifier and Type	Method	Description
boolean	activateController()	Activates the installed IIOParamController for this IIOParam object and returns the resulting value.
IIOParamController	getController()	Returns whatever IIOParamController is currently installed.
IIOParamController	getDefaultController()	Returns the default IIOParamController, if there is one, regardless of the currently installed controller.
Point	getDestinationOffset()	Returns the offset in the destination image at which pixels are to be placed.
ImageTypeSpecifier	getDestinationType()	Returns the type of image to be returned by the read, if one was set by a call to setDestination(ImageTypeSpecifier), as an ImageTypeSpecifier.
int[]	getSourceBands()	Returns the set of source bands to be used.
Rectangle	getSourceRegion()	Returns the source region to be used.
int	getSourceXSubsampling()	Returns the number of source columns to advance for each pixel.
int	getSourceYSubsampling()	Returns the number of rows to advance for each pixel.
int	getSubsamplingXOffset()	Returns the horizontal offset of the subsampling grid.
int	getSubsamplingYOffset()	Returns the vertical offset of the subsampling grid.
boolean	hasController()	Returns true if there is a controller installed for this IIOParam object.
void	setController(IIOParamController controller)	Sets the IIOParamController to be used to provide settings for this IIOParam object when the activateController method is called, overriding any default controller.
void	setDestinationOffset(Point destinationOffset)	Specifies the offset in the destination image at which future decoded pixels are to be placed, when reading, or where a region will be written, when writing.
void	setDestinationType(ImageTypeSpecifier destinationType)	Sets the desired image type for the destination image, using an ImageTypeSpecifier.
void	setSourceBands(int[] sourceBands)	Sets the indices of the source bands to be used.
void	setSourceRegion(Rectangle sourceRegion)	Sets the source region of interest.
void	setSourceSubsampling(int sourceXSubsampling, int sourceYSubsampling, int subsamplingXOffset, int subsamplingYOffset)	Specifies a decimation subsampling to apply on I/O.

Methods declared in class Object

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

Modifier and Type	Method	Description
protected Object	clone()	Creates and returns a copy of this object.
boolean	equals(Object obj)	Indicates whether some other object is "equal to" this one.
protected void	finalize()	Deprecated, for removal: This API element is subject to removal in a future version. Finalization is deprecated and subject to removal in a future release.
final Class<?>	getClass()	Returns the runtime class of this Object.
int	hashCode()	Returns a hash code value for this object.
final void	notify()	Wakes up a single thread that is waiting on this object's monitor.
final void	notifyAll()	Wakes up all threads that are waiting on this object's monitor.
String	toString()	Returns a string representation of the object.
final void	wait()	Causes the current thread to wait until it is awakened, typically by being notified or interrupted.
final void	wait(long timeoutMillis)	Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
final void	wait(long timeoutMillis, int nanos)	Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.

Constructor Details

TIFFImageReadParam

public TIFFImageReadParam()

Constructs a TIFFImageReadParam. Tags defined by the TIFFTagSets BaselineTIFFTagSet, FaxTIFFTagSet, ExifParentTIFFTagSet, and GeoTIFFTagSet will be supported.

See Also:

• BaselineTIFFTagSet
• FaxTIFFTagSet
• ExifParentTIFFTagSet
• GeoTIFFTagSet

Method Details

addAllowedTagSet

public void addAllowedTagSet(TIFFTagSet tagSet)

Adds a TIFFTagSet object to the list of allowed tag sets. Attempting to add a duplicate object to the list has no effect.

Parameters:

tagSet - a TIFFTagSet.

Throws:

IllegalArgumentException - if tagSet is null.

removeAllowedTagSet

public void removeAllowedTagSet(TIFFTagSet tagSet)

Removes a TIFFTagSet object from the list of allowed tag sets. Removal is based on the equals method of the TIFFTagSet, which is normally defined as reference equality.

Parameters:

tagSet - a TIFFTagSet.

Throws:

IllegalArgumentException - if tagSet is null.

getAllowedTagSets

public List<TIFFTagSet> getAllowedTagSets()

Returns a List containing the allowed TIFFTagSet objects.

Returns:

a List of TIFFTagSets.

setReadUnknownTags

public void setReadUnknownTags(boolean readUnknownTags)

Set whether to read fields corresponding to TIFFTags not in the allowed TIFFTagSets. The default setting is false. If the TIFF ImageReader is ignoring metadata, then a setting of true is overridden as all metadata are ignored except those essential to reading the image itself.

Parameters:

readUnknownTags - Whether to read fields of unrecognized tags

getReadUnknownTags

public boolean getReadUnknownTags()

Retrieve the setting of whether to read fields corresponding to unknown TIFFTags.

Returns:

Whether to read fields of unrecognized tags