ImageWriterpublic abstract class ImageWriter extends Object implements ImageTranscoder| An abstract superclass for encoding and writing images. This class
must be subclassed by classes that write out images in the context
of the Java Image I/O framework.
ImageWriter objects are normally instantiated by
the service provider class for the specific format. Service
provider classes are registered with the IIORegistry,
which uses them for format recognition and presentation of
available format readers and writers.
|
| Fields Summary |
|---|
| protected ImageWriterSpi | originatingProviderThe ImageWriterSpi that instantiated this object,
or null if its identity is not known or none
exists. By default it is initialized to null. | | protected Object | outputThe ImageOutputStream or other Object
set by setOutput and retrieved by
getOutput. By default it is initialized to
null. | | protected Locale[] | availableLocalesAn array of Locales that may be used to localize
warning messages and compression setting values, or
null if localization is not supported. By default
it is initialized to null. | | protected Locale | localeThe current Locale to be used for localization, or
null if none has been set. By default it is
initialized to null. | | protected List | warningListenersA List of currently registered
IIOWriteWarningListeners, initialized by default to
null, which is synonymous with an empty
List. | | protected List | warningLocalesA List of Locales, one for each
element of warningListeners, initialized by default
null, which is synonymous with an empty
List. | | protected List | progressListenersA List of currently registered
IIOWriteProgressListeners, initialized by default
null, which is synonymous with an empty
List. | | private boolean | abortFlagIf true, the current write operation should be
aborted. |
| Constructors Summary |
|---|
protected ImageWriter(ImageWriterSpi originatingProvider)Constructs an ImageWriter and sets its
originatingProvider instance variable to the
supplied value.
Subclasses that make use of extensions should provide a
constructor with signature (ImageWriterSpi,
Object) in order to retrieve the extension object. If
the extension object is unsuitable, an
IllegalArgumentException should be thrown.
this.originatingProvider = originatingProvider;
|
| Methods Summary |
|---|
| public synchronized void | abort()Requests that any current write operation be aborted. The
contents of the output following the abort will be undefined.
Writers should call clearAbortRequest at the
beginning of each write operation, and poll the value of
abortRequested regularly during the write.
this.abortFlag = true;
| | protected synchronized boolean | abortRequested()Returns true if a request to abort the current
write operation has been made since the writer was instantiated or
clearAbortRequest was called.
return this.abortFlag;
| | public void | addIIOWriteProgressListener(javax.imageio.event.IIOWriteProgressListener listener)Adds an IIOWriteProgressListener to the list of
registered progress listeners. If listener is
null, no exception will be thrown and no action
will be taken.
if (listener == null) {
return;
}
progressListeners = ImageReader.addToList(progressListeners, listener);
| | public void | addIIOWriteWarningListener(javax.imageio.event.IIOWriteWarningListener listener)Adds an IIOWriteWarningListener to the list of
registered warning listeners. If listener is
null, no exception will be thrown and no action
will be taken. Messages sent to the given listener will be
localized, if possible, to match the current
Locale. If no Locale has been set,
warning messages may be localized as the writer sees fit.
if (listener == null) {
return;
}
warningListeners = ImageReader.addToList(warningListeners, listener);
warningLocales = ImageReader.addToList(warningLocales, getLocale());
| | public boolean | canInsertEmpty(int imageIndex)Returns true if the writer supports the insertion
of a new, empty image at the given index. The pixel values of
the image are undefined, and may be specified in pieces using
the replacePixels methods. Existing images with
indices greater than or equal to the insertion index will have
their indices increased by 1. A value for
imageIndex of -1 may be used to
signify an index one larger than the current largest index.
A writer that does not support insertion of empty images
may return false without performing bounds
checking on the index.
The default implementation throws an
IllegalStateException if the output is
null, and otherwise returns false
without checking the value of imageIndex.
if (getOutput() == null) {
throw new IllegalStateException("getOutput() == null!");
}
return false;
| | public boolean | canInsertImage(int imageIndex)Returns true if the writer supports the insertion
of a new image at the given index. Existing images with
indices greater than or equal to the insertion index will have
their indices increased by 1. A value for
imageIndex of -1 may be used to
signify an index one larger than the current largest index.
A writer that does not support any image insertion may
return false without performing bounds checking on
the index.
The default implementation throws an
IllegalStateException if the output is
null, and otherwise returns false
withour checking the value of imageIndex.
if (getOutput() == null) {
throw new IllegalStateException("getOutput() == null!");
}
return false;
| | public boolean | canRemoveImage(int imageIndex)Returns true if the writer supports the removal
of an existing image at the given index. Existing images with
indices greater than the insertion index will have
their indices decreased by 1.
A writer that does not support any image removal may
return false without performing bounds checking on
the index.
The default implementation throws an
IllegalStateException if the output is
null, and otherwise returns false
without checking the value of imageIndex.
if (getOutput() == null) {
throw new IllegalStateException("getOutput() == null!");
}
return false;
| | public boolean | canReplaceImageMetadata(int imageIndex)Returns true if it is possible to replace the
image metadata associated with an existing image with index
imageIndex. If this method returns
false, a call to
replaceImageMetadata(imageIndex) will throw an
UnsupportedOperationException.
A writer that does not support any image metadata
replacement may return false without performing
bounds checking on the index.
The default implementation throws an
IllegalStateException if the output is
null, and otherwise returns false
without checking the value of imageIndex.
if (getOutput() == null) {
throw new IllegalStateException("getOutput() == null!");
}
return false;
| | public boolean | canReplacePixels(int imageIndex)Returns true if the writer allows pixels of the
given image to be replaced using the replacePixels
methods.
A writer that does not support any pixel replacement may
return false without performing bounds checking on
the index.
The default implementation throws an
IllegalStateException if the output is
null, and otherwise returns false
without checking the value of imageIndex.
if (getOutput() == null) {
throw new IllegalStateException("getOutput() == null!");
}
return false;
| | public boolean | canReplaceStreamMetadata()Returns true if it is possible to replace the
stream metadata already present in the output.
The default implementation throws an
IllegalStateException if the output is
null, and otherwise returns false.
if (getOutput() == null) {
throw new IllegalStateException("getOutput() == null!");
}
return false;
| | public boolean | canWriteEmpty()Returns true if the writer supports the writing of
a complete image stream consisting of a single image with
undefined pixel values and associated metadata and thumbnails
to the output. The pixel values may be defined by future
calls to the replacePixels methods. If the output
is an ImageOutputStream, its existing contents
prior to the current seek position are not affected, and need
not be readable or writable.
The default implementation throws an
IllegalStateException if the output is
null, and otherwise returns false.
if (getOutput() == null) {
throw new IllegalStateException("getOutput() == null!");
}
return false;
| | public boolean | canWriteRasters()Returns true if the methods that take an
IIOImage parameter are capable of dealing with a
Raster (as opposed to RenderedImage)
source image. If this method returns false, then
those methods will throw an
UnsupportedOperationException if supplied with an
IIOImage containing a Raster.
The default implementation returns false.
return false;
| | public boolean | canWriteSequence()Returns true if the writer is able to append an
image to an image stream that already contains header
information and possibly prior images.
If canWriteSequence returns false,
writeToSequence and endWriteSequence
will throw an UnsupportedOperationException.
The default implementation returns false.
return false;
| | protected synchronized void | clearAbortRequest()Clears any previous abort request. After this method has been
called, abortRequested will return
false.
this.abortFlag = false;
| | public abstract javax.imageio.metadata.IIOMetadata | convertImageMetadata(javax.imageio.metadata.IIOMetadata inData, javax.imageio.ImageTypeSpecifier imageType, javax.imageio.ImageWriteParam param)
| | public abstract javax.imageio.metadata.IIOMetadata | convertStreamMetadata(javax.imageio.metadata.IIOMetadata inData, javax.imageio.ImageWriteParam param)
| | public void | dispose()Allows any resources held by this object to be released. The
result of calling any other method (other than
finalize) subsequent to a call to this method
is undefined.
It is important for applications to call this method when they
know they will no longer be using this ImageWriter.
Otherwise, the writer may continue to hold on to resources
indefinitely.
The default implementation of this method in the superclass does
nothing. Subclass implementations should ensure that all resources,
especially native resources, are released.
| | public void | endInsertEmpty()Completes the insertion of a new image that was begun with a
prior call to prepareInsertEmpty.
The default implementation throws an
IllegalStateException if the output is
null, and otherwise throws an
UnsupportedOperationException.
unsupported();
| | public void | endReplacePixels()Terminates a sequence of calls to replacePixels.
If canReplacePixels returns
false, and
UnsupportedOperationException will be thrown.
The default implementation throws an
IllegalStateException if the output is
null, and otherwise throws an
UnsupportedOperationException.
unsupported();
| | public void | endWriteEmpty()Completes the writing of a new image that was begun with a
prior call to prepareWriteEmpty.
If canWriteEmpty() returns false,
an UnsupportedOperationException will be thrown.
The default implementation throws an
IllegalStateException if the output is
null, and otherwise throws an
UnsupportedOperationException.
if (getOutput() == null) {
throw new IllegalStateException("getOutput() == null!");
}
throw new IllegalStateException("No call to prepareWriteEmpty!");
| | public void | endWriteSequence()Completes the writing of a sequence of images begun with
prepareWriteSequence. Any stream metadata that
should come at the end of the sequence of images is written out,
and any header information at the beginning of the sequence is
patched up if necessary. If the output is an
ImageOutputStream, data through the stream metadata
at the end of the sequence are flushed and need not be readable
or writable.
If canWriteSequence returns false,
this method will throw an
UnsupportedOperationException.
The default implementation throws an
IllegalStateException if the output is
null, and otherwise throws an
UnsupportedOperationException.
unsupported();
| | public java.util.Locale[] | getAvailableLocales()Returns an array of Locales that may be used to
localize warning listeners and compression settings. A return
value of null indicates that localization is not
supported.
The default implementation returns a clone of the
availableLocales instance variable if it is
non-null, or else returns null.
return (availableLocales == null) ?
null : (Locale[])availableLocales.clone();
| | public abstract javax.imageio.metadata.IIOMetadata | getDefaultImageMetadata(javax.imageio.ImageTypeSpecifier imageType, javax.imageio.ImageWriteParam param)Returns an IIOMetadata object containing default
values for encoding an image of the given type. The contents
of the object may be manipulated using either the XML tree
structure returned by the IIOMetadata.getAsTree
method, an IIOMetadataController object, or via
plug-in specific interfaces, and the resulting data supplied to
one of the write methods that take a stream
metadata parameter.
An optional ImageWriteParam may be supplied
for cases where it may affect the structure of the image
metadata.
If the supplied ImageWriteParam contains
optional setting values not supported by this writer (e.g.
progressive encoding or any format-specific settings), they
will be ignored.
| | public abstract javax.imageio.metadata.IIOMetadata | getDefaultStreamMetadata(javax.imageio.ImageWriteParam param)Returns an IIOMetadata object containing default
values for encoding a stream of images. The contents of the
object may be manipulated using either the XML tree structure
returned by the IIOMetadata.getAsTree method, an
IIOMetadataController object, or via plug-in
specific interfaces, and the resulting data supplied to one of
the write methods that take a stream metadata
parameter.
An optional ImageWriteParam may be supplied
for cases where it may affect the structure of the stream
metadata.
If the supplied ImageWriteParam contains
optional setting values not supported by this writer (e.g.
progressive encoding or any format-specific settings), they
will be ignored.
Writers that do not make use of stream metadata
(e.g., writers for single-image formats) should return
null.
| | public javax.imageio.ImageWriteParam | getDefaultWriteParam()Returns a new ImageWriteParam object of the
appropriate type for this file format containing default
values, that is, those values that would be used
if no ImageWriteParam object were specified. This
is useful as a starting point for tweaking just a few parameters
and otherwise leaving the default settings alone.
The default implementation constructs and returns a new
ImageWriteParam object that does not allow tiling,
progressive encoding, or compression, and that will be
localized for the current Locale (i.e.,
what you would get by calling new
ImageWriteParam(getLocale()).
Individual plug-ins may return an instance of
ImageWriteParam with additional optional features
enabled, or they may return an instance of a plug-in specific
subclass of ImageWriteParam.
return new ImageWriteParam(getLocale());
| | public java.util.Locale | getLocale()Returns the currently set Locale, or
null if none has been set.
The default implementation returns the value of the
locale instance variable.
return locale;
| | public int | getNumThumbnailsSupported(javax.imageio.ImageTypeSpecifier imageType, javax.imageio.ImageWriteParam param, javax.imageio.metadata.IIOMetadata streamMetadata, javax.imageio.metadata.IIOMetadata imageMetadata)Returns the number of thumbnails suported by the format being
written, given the image type and any additional write
parameters and metadata objects that will be used during
encoding. A return value of -1 indicates that
insufficient information is available.
An ImageWriteParam may optionally be supplied
for cases where it may affect thumbnail handling.
If the supplied ImageWriteParam contains
optional setting values not supported by this writer (e.g.
progressive encoding or any format-specific settings), they
will be ignored.
The default implementation returns 0.
return 0;
| | public javax.imageio.spi.ImageWriterSpi | getOriginatingProvider()Returns the ImageWriterSpi object that created
this ImageWriter, or null if this
object was not created through the IIORegistry.
The default implementation returns the value of the
originatingProvider instance variable.
return originatingProvider;
| | public java.lang.Object | getOutput()Returns the ImageOutputStream or other
Object set by the most recent call to the
setOutput method. If no destination has been
set, null is returned.
The default implementation returns the value of the
output instance variable.
return output;
| | public java.awt.Dimension[] | getPreferredThumbnailSizes(javax.imageio.ImageTypeSpecifier imageType, javax.imageio.ImageWriteParam param, javax.imageio.metadata.IIOMetadata streamMetadata, javax.imageio.metadata.IIOMetadata imageMetadata)Returns an array of Dimensions indicating the
legal size ranges for thumbnail images as they will be encoded
in the output file or stream. This information is merely
advisory; the writer will resize any supplied thumbnails as
necessary.
The information is returned as a set of pairs; the first
element of a pair contains an (inclusive) minimum width and
height, and the second element contains an (inclusive) maximum
width and height. Together, each pair defines a valid range of
sizes. To specify a fixed size, the same width and height will
appear for both elements. A return value of null
indicates that the size is arbitrary or unknown.
An ImageWriteParam may optionally be supplied
for cases where it may affect thumbnail handling.
If the supplied ImageWriteParam contains
optional setting values not supported by this writer (e.g.
progressive encoding or any format-specific settings), they
will be ignored.
The default implementation returns null.
return null;
| | public void | prepareInsertEmpty(int imageIndex, javax.imageio.ImageTypeSpecifier imageType, int width, int height, javax.imageio.metadata.IIOMetadata imageMetadata, java.util.List thumbnails, javax.imageio.ImageWriteParam param)Begins the insertion of a new image with undefined pixel values
into an existing image stream. Existing images with an index
greater than imageIndex are preserved, and their
indices are each increased by 1. A value for
imageIndex of -1 may be used to signify an index
one larger than the previous largest index; that is, it will
cause the image to be logically appended to the end of the
sequence. If the output is an ImageOutputStream,
the entirety of the stream must be both readable and writeable.
The image contents may be
supplied later using the replacePixels method.
The insertion is not complete until a call to
endInsertEmpty occurs. Calls to
prepareReplacePixels, replacePixels,
and endReplacePixels may occur between calls to
prepareInsertEmpty and
endInsertEmpty. However, calls to
prepareInsertEmpty cannot be nested, and calls to
prepareWriteEmpty and
prepareInsertEmpty may not be interspersed.
If canInsertEmpty(imageIndex) returns
false, an
UnsupportedOperationException will be thrown.
An ImageWriteParam may optionally be supplied
to control the writing process. If param is
null, a default write param will be used.
If the supplied ImageWriteParam contains
optional setting values not supported by this writer (e.g.
progressive encoding or any format-specific settings), they
will be ignored.
The default implementation throws an
IllegalStateException if the output is
null, and otherwise throws an
UnsupportedOperationException.
unsupported();
| | public void | prepareReplacePixels(int imageIndex, java.awt.Rectangle region)Prepares the writer to handle a series of calls to the
replacePixels methods. The affected pixel area
will be clipped against the supplied
If canReplacePixels returns
false, and
UnsupportedOperationException will be thrown.
The default implementation throws an
IllegalStateException if the output is
null, and otherwise throws an
UnsupportedOperationException.
unsupported();
| | public void | prepareWriteEmpty(javax.imageio.metadata.IIOMetadata streamMetadata, javax.imageio.ImageTypeSpecifier imageType, int width, int height, javax.imageio.metadata.IIOMetadata imageMetadata, java.util.List thumbnails, javax.imageio.ImageWriteParam param)Begins the writing of a complete image stream, consisting of a
single image with undefined pixel values and associated
metadata and thumbnails, to the output. The pixel values will
be defined by future calls to the replacePixels
methods. If the output is an ImageOutputStream,
its existing contents prior to the current seek position are
not affected, and need not be readable or writable.
The writing is not complete until a call to
endWriteEmpty occurs. Calls to
prepareReplacePixels, replacePixels,
and endReplacePixels may occur between calls to
prepareWriteEmpty and endWriteEmpty.
However, calls to prepareWriteEmpty cannot be
nested, and calls to prepareWriteEmpty and
prepareInsertEmpty may not be interspersed.
If canWriteEmpty returns false,
an UnsupportedOperationException will be thrown.
An ImageWriteParam may optionally be supplied
to control the writing process. If param is
null, a default write param will be used.
If the supplied ImageWriteParam contains
optional setting values not supported by this writer (e.g.
progressive encoding or any format-specific settings), they
will be ignored.
The default implementation throws an
IllegalStateException if the output is
null, and otherwise throws an
UnsupportedOperationException.
unsupported();
| | public void | prepareWriteSequence(javax.imageio.metadata.IIOMetadata streamMetadata)Prepares a stream to accept a series of subsequent
writeToSequence calls, using the provided stream
metadata object. The metadata will be written to the stream if
it should precede the image data. If the argument is null,
default stream metadata is used.
If the output is an ImageOutputStream, the existing
contents of the output prior to the current seek position are
flushed, and need not be readable or writable. If the format
requires that endWriteSequence be able to rewind to
patch up the header information, such as for a sequence of images
in a single TIFF file, then the metadata written by this method
must remain in a writable portion of the stream. Other formats
may flush the stream after this method and after each image.
If canWriteSequence returns false,
this method will throw an
UnsupportedOperationException.
The output must have been set beforehand using either
the setOutput method.
The default implementation throws an
IllegalStateException if the output is
null, and otherwise throws an
UnsupportedOperationException.
unsupported();
| | protected void | processImageComplete()Broadcasts the completion of an image write to all registered
IIOWriteProgressListeners by calling their
imageComplete method. Subclasses may use this
method as a convenience.
if (progressListeners == null) {
return;
}
int numListeners = progressListeners.size();
for (int i = 0; i < numListeners; i++) {
IIOWriteProgressListener listener =
(IIOWriteProgressListener)progressListeners.get(i);
listener.imageComplete(this);
}
| | protected void | processImageProgress(float percentageDone)Broadcasts the current percentage of image completion to all
registered IIOWriteProgressListeners by calling
their imageProgress method. Subclasses may use
this method as a convenience.
if (progressListeners == null) {
return;
}
int numListeners = progressListeners.size();
for (int i = 0; i < numListeners; i++) {
IIOWriteProgressListener listener =
(IIOWriteProgressListener)progressListeners.get(i);
listener.imageProgress(this, percentageDone);
}
| | protected void | processImageStarted(int imageIndex)Broadcasts the start of an image write to all registered
IIOWriteProgressListeners by calling their
imageStarted method. Subclasses may use this
method as a convenience.
if (progressListeners == null) {
return;
}
int numListeners = progressListeners.size();
for (int i = 0; i < numListeners; i++) {
IIOWriteProgressListener listener =
(IIOWriteProgressListener)progressListeners.get(i);
listener.imageStarted(this, imageIndex);
}
| | protected void | processThumbnailComplete()Broadcasts the completion of a thumbnail write to all registered
IIOWriteProgressListeners by calling their
thumbnailComplete method. Subclasses may use this
method as a convenience.
if (progressListeners == null) {
return;
}
int numListeners = progressListeners.size();
for (int i = 0; i < numListeners; i++) {
IIOWriteProgressListener listener =
(IIOWriteProgressListener)progressListeners.get(i);
listener.thumbnailComplete(this);
}
| | protected void | processThumbnailProgress(float percentageDone)Broadcasts the current percentage of thumbnail completion to
all registered IIOWriteProgressListeners by calling
their thumbnailProgress method. Subclasses may
use this method as a convenience.
if (progressListeners == null) {
return;
}
int numListeners = progressListeners.size();
for (int i = 0; i < numListeners; i++) {
IIOWriteProgressListener listener =
(IIOWriteProgressListener)progressListeners.get(i);
listener.thumbnailProgress(this, percentageDone);
}
| | protected void | processThumbnailStarted(int imageIndex, int thumbnailIndex)Broadcasts the start of a thumbnail write to all registered
IIOWriteProgressListeners by calling their
thumbnailStarted method. Subclasses may use this
method as a convenience.
if (progressListeners == null) {
return;
}
int numListeners = progressListeners.size();
for (int i = 0; i < numListeners; i++) {
IIOWriteProgressListener listener =
(IIOWriteProgressListener)progressListeners.get(i);
listener.thumbnailStarted(this, imageIndex, thumbnailIndex);
}
| | protected void | processWarningOccurred(int imageIndex, java.lang.String warning)Broadcasts a warning message to all registered
IIOWriteWarningListeners by calling their
warningOccurred method. Subclasses may use this
method as a convenience.
if (warningListeners == null) {
return;
}
if (warning == null) {
throw new IllegalArgumentException("warning == null!");
}
int numListeners = warningListeners.size();
for (int i = 0; i < numListeners; i++) {
IIOWriteWarningListener listener =
(IIOWriteWarningListener)warningListeners.get(i);
listener.warningOccurred(this, imageIndex, warning);
}
| | protected void | processWarningOccurred(int imageIndex, java.lang.String baseName, java.lang.String keyword)Broadcasts a localized warning message to all registered
IIOWriteWarningListeners by calling their
warningOccurred method with a string taken
from a ResourceBundle. Subclasses may use this
method as a convenience.
if (warningListeners == null) {
return;
}
if (baseName == null) {
throw new IllegalArgumentException("baseName == null!");
}
if (keyword == null) {
throw new IllegalArgumentException("keyword == null!");
}
int numListeners = warningListeners.size();
for (int i = 0; i < numListeners; i++) {
IIOWriteWarningListener listener =
(IIOWriteWarningListener)warningListeners.get(i);
Locale locale = (Locale)warningLocales.get(i);
if (locale == null) {
locale = Locale.getDefault();
}
/**
* If an applet supplies an implementation of ImageWriter and
* resource bundles, then the resource bundle will need to be
* accessed via the applet class loader. So first try the context
* class loader to locate the resource bundle.
* If that throws MissingResourceException, then try the
* system class loader.
*/
ClassLoader loader = (ClassLoader)
java.security.AccessController.doPrivileged(
new java.security.PrivilegedAction() {
public Object run() {
return Thread.currentThread().getContextClassLoader();
}
});
ResourceBundle bundle = null;
try {
bundle = ResourceBundle.getBundle(baseName, locale, loader);
} catch (MissingResourceException mre) {
try {
bundle = ResourceBundle.getBundle(baseName, locale);
} catch (MissingResourceException mre1) {
throw new IllegalArgumentException("Bundle not found!");
}
}
String warning = null;
try {
warning = bundle.getString(keyword);
} catch (ClassCastException cce) {
throw new IllegalArgumentException("Resource is not a String!");
} catch (MissingResourceException mre) {
throw new IllegalArgumentException("Resource is missing!");
}
listener.warningOccurred(this, imageIndex, warning);
}
| | protected void | processWriteAborted()Broadcasts that the write has been aborted to all registered
IIOWriteProgressListeners by calling their
writeAborted method. Subclasses may use this
method as a convenience.
if (progressListeners == null) {
return;
}
int numListeners = progressListeners.size();
for (int i = 0; i < numListeners; i++) {
IIOWriteProgressListener listener =
(IIOWriteProgressListener)progressListeners.get(i);
listener.writeAborted(this);
}
| | public void | removeAllIIOWriteProgressListeners()Removes all currently registered
IIOWriteProgressListener objects.
The default implementation sets the
progressListeners instance variable to
null.
this.progressListeners = null;
| | public void | removeAllIIOWriteWarningListeners()Removes all currently registered
IIOWriteWarningListener objects.
The default implementation sets the
warningListeners and warningLocales
instance variables to null.
this.warningListeners = null;
this.warningLocales = null;
| | public void | removeIIOWriteProgressListener(javax.imageio.event.IIOWriteProgressListener listener)Removes an IIOWriteProgressListener from the list
of registered progress listeners. If the listener was not
previously registered, or if listener is
null, no exception will be thrown and no action
will be taken.
if (listener == null || progressListeners == null) {
return;
}
progressListeners =
ImageReader.removeFromList(progressListeners, listener);
| | public void | removeIIOWriteWarningListener(javax.imageio.event.IIOWriteWarningListener listener)Removes an IIOWriteWarningListener from the list
of registered warning listeners. If the listener was not
previously registered, or if listener is
null, no exception will be thrown and no action
will be taken.
if (listener == null || warningListeners == null) {
return;
}
int index = warningListeners.indexOf(listener);
if (index != -1) {
warningListeners.remove(index);
warningLocales.remove(index);
if (warningListeners.size() == 0) {
warningListeners = null;
warningLocales = null;
}
}
| | public void | removeImage(int imageIndex)Removes an image from the stream.
If canRemoveImage(imageIndex) returns false,
an UnsupportedOperationExceptionwill be thrown.
The removal may or may not cause a reduction in the actual
file size.
The default implementation throws an
IllegalStateException if the output is
null, and otherwise throws an
UnsupportedOperationException.
unsupported();
| | public void | replaceImageMetadata(int imageIndex, javax.imageio.metadata.IIOMetadata imageMetadata)Replaces the image metadata associated with an existing image.
If canReplaceImageMetadata(imageIndex) returns
false, an
UnsupportedOperationException will be thrown.
The default implementation throws an
IllegalStateException if the output is
null, and otherwise throws an
UnsupportedOperationException.
unsupported();
| | public void | replacePixels(java.awt.image.RenderedImage image, javax.imageio.ImageWriteParam param)Replaces a portion of an image already present in the output
with a portion of the given image. The image data must match,
or be convertible to, the image layout of the existing image.
The destination region is specified in the
param argument, and will be clipped to the image
boundaries and the region supplied to
prepareReplacePixels. At least one pixel of the
source must not be clipped, or an exception is thrown.
An ImageWriteParam may optionally be supplied
to control the writing process. If param is
null, a default write param will be used.
If the supplied ImageWriteParam contains
optional setting values not supported by this writer (e.g.
progressive encoding or any format-specific settings), they
will be ignored.
This method may only be called after a call to
prepareReplacePixels, or else an
IllegalStateException will be thrown.
The default implementation throws an
IllegalStateException if the output is
null, and otherwise throws an
UnsupportedOperationException.
unsupported();
| | public void | replacePixels(java.awt.image.Raster raster, javax.imageio.ImageWriteParam param)Replaces a portion of an image already present in the output
with a portion of the given Raster. The image
data must match, or be convertible to, the image layout of the
existing image.
An ImageWriteParam may optionally be supplied
to control the writing process. If param is
null, a default write param will be used.
The destination region is specified in the
param argument, and will be clipped to the image
boundaries and the region supplied to
prepareReplacePixels. At least one pixel of the
source must not be clipped, or an exception is thrown.
If the supplied ImageWriteParam contains
optional setting values not supported by this writer (e.g.
progressive encoding or any format-specific settings), they
will be ignored.
This method may only be called after a call to
prepareReplacePixels, or else an
IllegalStateException will be thrown.
The default implementation throws an
IllegalStateException if the output is
null, and otherwise throws an
UnsupportedOperationException.
unsupported();
| | public void | replaceStreamMetadata(javax.imageio.metadata.IIOMetadata streamMetadata)Replaces the stream metadata in the output with new
information. If the output is an
ImageOutputStream, the prior contents of the
stream are examined and possibly edited to make room for the
new data. All of the prior contents of the output must be
available for reading and writing.
If canReplaceStreamMetadata returns
false, an
UnsupportedOperationException will be thrown.
The default implementation throws an
IllegalStateException if the output is
null, and otherwise throws an
UnsupportedOperationException.
unsupported();
| | public void | reset()Restores the ImageWriter to its initial state.
The default implementation calls
setOutput(null), setLocale(null),
removeAllIIOWriteWarningListeners(),
removeAllIIOWriteProgressListeners(), and
clearAbortRequest.
setOutput(null);
setLocale(null);
removeAllIIOWriteWarningListeners();
removeAllIIOWriteProgressListeners();
clearAbortRequest();
| | public void | setLocale(java.util.Locale locale)Sets the current Locale of this
ImageWriter to the given value. A value of
null removes any previous setting, and indicates
that the writer should localize as it sees fit.
The default implementation checks locale
against the values returned by
getAvailableLocales, and sets the
locale instance variable if it is found. If
locale is null, the instance variable
is set to null without any checking.
if (locale != null) {
Locale[] locales = getAvailableLocales();
boolean found = false;
if (locales != null) {
for (int i = 0; i < locales.length; i++) {
if (locale.equals(locales[i])) {
found = true;
break;
}
}
}
if (!found) {
throw new IllegalArgumentException("Invalid locale!");
}
}
this.locale = locale;
| | public void | setOutput(java.lang.Object output)Sets the destination to the given
ImageOutputStream or other Object.
The destination is assumed to be ready to accept data, and will
not be closed at the end of each write. This allows distributed
imaging applications to transmit a series of images over a
single network connection. If output is
null, any currently set output will be removed.
If output is an
ImageOutputStream, calls to the
write, writeToSequence, and
prepareWriteEmpty/endWriteEmpty
methods will preserve the existing contents of the stream.
Other write methods, such as writeInsert,
replaceStreamMetadata,
replaceImageMetadata, replacePixels,
prepareInsertEmpty/endInsertEmpty,
and endWriteSequence, require the full contents
of the stream to be readable and writable, and may alter any
portion of the stream.
Use of a general Object other than an
ImageOutputStream is intended for writers that
interact directly with an output device or imaging protocol.
The set of legal classes is advertised by the writer's service
provider's getOutputTypes method; most writers
will return a single-element array containing only
ImageOutputStream.class to indicate that they
accept only an ImageOutputStream.
The default implementation sets the output
instance variable to the value of output after
checking output against the set of classes
advertised by the originating provider, if there is one.
if (output != null) {
ImageWriterSpi provider = getOriginatingProvider();
if (provider != null) {
Class[] classes = provider.getOutputTypes();
boolean found = false;
for (int i = 0; i < classes.length; i++) {
if (classes[i].isInstance(output)) {
found = true;
break;
}
}
if (!found) {
throw new IllegalArgumentException("Illegal output type!");
}
}
}
this.output = output;
| | private void | unsupported()
if (getOutput() == null) {
throw new IllegalStateException("getOutput() == null!");
}
throw new UnsupportedOperationException("Unsupported write variant!");
| | public abstract void | write(javax.imageio.metadata.IIOMetadata streamMetadata, javax.imageio.IIOImage image, javax.imageio.ImageWriteParam param)Appends a complete image stream containing a single image and
associated stream and image metadata and thumbnails to the
output. Any necessary header information is included. If the
output is an ImageOutputStream, its existing
contents prior to the current seek position are not affected,
and need not be readable or writable.
The output must have been set beforehand using the
setOutput method.
Stream metadata may optionally be supplied; if it is
null, default stream metadata will be used.
If canWriteRasters returns true,
the IIOImage may contain a Raster
source. Otherwise, it must contain a
RenderedImage source.
The supplied thumbnails will be resized if needed, and any
thumbnails in excess of the supported number will be ignored.
If the format requires additional thumbnails that are not
provided, the writer should generate them internally.
An ImageWriteParam may
optionally be supplied to control the writing process. If
param is null, a default write param
will be used.
If the supplied ImageWriteParam contains
optional setting values not supported by this writer (e.g.
progressive encoding or any format-specific settings), they
will be ignored.
| | public void | write(javax.imageio.IIOImage image)Appends a complete image stream containing a single image with
default metadata and thumbnails to the output. This method is
a shorthand for write(null, image, null).
write(null, image, null);
| | public void | write(java.awt.image.RenderedImage image)Appends a complete image stream consisting of a single image
with default metadata and thumbnails to the output. This
method is a shorthand for write(null, new IIOImage(image,
null, null), null).
write(null, new IIOImage(image, null, null), null);
| | public void | writeInsert(int imageIndex, javax.imageio.IIOImage image, javax.imageio.ImageWriteParam param)Inserts a new image into an existing image stream. Existing
images with an index greater than imageIndex are
preserved, and their indices are each increased by 1. A value
for imageIndex of -1 may be used to signify an
index one larger than the previous largest index; that is, it
will cause the image to be logically appended to the end of the
sequence. If the output is an ImageOutputStream,
the entirety of the stream must be both readable and writeable.
If canInsertImage(imageIndex) returns
false, an
UnsupportedOperationException will be thrown.
An ImageWriteParam may optionally be supplied
to control the writing process. If param is
null, a default write param will be used.
If the supplied ImageWriteParam contains
optional setting values not supported by this writer (e.g.
progressive encoding or any format-specific settings), they
will be ignored.
The default implementation throws an
IllegalStateException if the output is
null, and otherwise throws an
UnsupportedOperationException.
unsupported();
| | public void | writeToSequence(javax.imageio.IIOImage image, javax.imageio.ImageWriteParam param)Appends a single image and possibly associated metadata and
thumbnails, to the output. If the output is an
ImageOutputStream, the existing contents of the
output prior to the current seek position may be flushed, and
need not be readable or writable, unless the plug-in needs to
be able to patch up the header information when
endWriteSequence is called (e.g. TIFF).
If canWriteSequence returns false,
this method will throw an
UnsupportedOperationException.
The output must have been set beforehand using
the setOutput method.
prepareWriteSequence must have been called
beforehand, or an IllegalStateException is thrown.
If canWriteRasters returns true,
the IIOImage may contain a Raster
source. Otherwise, it must contain a
RenderedImage source.
The supplied thumbnails will be resized if needed, and any
thumbnails in excess of the supported number will be ignored.
If the format requires additional thumbnails that are not
provided, the writer will generate them internally.
An ImageWriteParam may optionally be supplied
to control the writing process. If param is
null, a default write param will be used.
If the supplied ImageWriteParam contains
optional setting values not supported by this writer (e.g.
progressive encoding or any format-specific settings), they
will be ignored.
The default implementation throws an
IllegalStateException if the output is
null, and otherwise throws an
UnsupportedOperationException.
unsupported();
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