OpenJDK 27 · com.sun.imageio.plugins.wbmp.WBMPImageReaderSpi

Modifier and Type	Field and Description
private static String[]	extensions
private static String[]	formatNames
private static final int	MAX_WBMP_HEIGHT
private static final int	MAX_WBMP_WIDTH
private static String[]	mimeType
private boolean	registered
private static String[]	writerSpiNames Hides javax.imageio.spi.ImageReaderSpi.writerSpiNames.

Access	Constructor and Description
public	WBMPImageReaderSpi()

Method Summary

Modifier and Type	Method and Description
public boolean	canDecodeInput(Object source) Implements abstract javax.imageio.spi.ImageReaderSpi.canDecodeInput. Returns `true` if the supplied source object appears to be of the format supported by this reader.
public ImageReader	createReaderInstance(Object extension) Implements abstract javax.imageio.spi.ImageReaderSpi.createReaderInstance. Returns an instance of the `ImageReader` implementation associated with this service provider.
public String	getDescription(Locale locale) Implements abstract javax.imageio.spi.IIOServiceProvider.getDescription. Returns a brief, human-readable description of this service provider and its associated implementation.
public void	onRegistration(ServiceRegistry registry, Class<?> category) Overrides javax.imageio.spi.IIOServiceProvider.onRegistration. Implements javax.imageio.spi.RegisterableService.onRegistration. A callback that will be called exactly once after the Spi class has been instantiated and registered in a `ServiceRegistry`.
private static int	Returns: the integer value, or -1 if EOF or integer overflow. tryReadMultiByteInteger(ImageInputStream the image input stream to read. stream) Reads a positive integer value encoded on a variable number of bytes, but stops the reading on end-of-file (EOF) or on integer overflow.

Inherited from javax.imageio.spi.ImageReaderSpi:: createReaderInstance getImageWriterSpiNames getInputTypes isOwnReader

extensions	back to summary
private static String[] extensions

formatNames	back to summary
private static String[] formatNames

MAX_WBMP_HEIGHT	back to summary
private static final int MAX_WBMP_HEIGHT

MAX_WBMP_WIDTH	back to summary
private static final int MAX_WBMP_WIDTH

mimeType	back to summary
private static String[] mimeType

registered	back to summary
private boolean registered

writerSpiNames	back to summary
private static String[] writerSpiNames Hides javax.imageio.spi.ImageReaderSpi.writerSpiNames.

WBMPImageReaderSpi	back to summary
public WBMPImageReaderSpi()

Method Detail

canDecodeInput back to summary

canDecodeInput	back to summary
public boolean canDecodeInput(Object source) throws IOException Implements abstract javax.imageio.spi.ImageReaderSpi.canDecodeInput. Doc from javax.imageio.spi.ImageReaderSpi.canDecodeInput. Returns `true` if the supplied source object appears to be of the format supported by this reader. Returning `true` from this method does not guarantee that reading will succeed, only that there appears to be a reasonable chance of success based on a brief inspection of the stream contents. If the source is an `ImageInputStream`, implementations will commonly check the first several bytes of the stream for a "magic number" associated with the format. Once actual reading has commenced, the reader may still indicate failure at any time prior to the completion of decoding. It is important that the state of the object not be disturbed in order that other `ImageReaderSpi`s can properly determine whether they are able to decode the object. In particular, if the source is an `ImageInputStream`, a `mark`/`reset` pair should be used to preserve the stream position. Formats such as "raw," which can potentially attempt to read nearly any stream, should return `false` in order to avoid being invoked in preference to a closer match. If `source` is not an instance of one of the classes returned by `getInputTypes`, the method should simply return `false`. Annotations @Override Exceptions IOException: if an I/O error occurs while reading the stream.

public boolean canDecodeInput(Object source) throws IOException

Implements abstract javax.imageio.spi.ImageReaderSpi.canDecodeInput.

Doc from javax.imageio.spi.ImageReaderSpi.canDecodeInput.

Returns true if the supplied source object appears to be of the format supported by this reader. Returning true from this method does not guarantee that reading will succeed, only that there appears to be a reasonable chance of success based on a brief inspection of the stream contents. If the source is an ImageInputStream, implementations will commonly check the first several bytes of the stream for a "magic number" associated with the format. Once actual reading has commenced, the reader may still indicate failure at any time prior to the completion of decoding.

It is important that the state of the object not be disturbed in order that other ImageReaderSpis can properly determine whether they are able to decode the object. In particular, if the source is an ImageInputStream, a mark/reset pair should be used to preserve the stream position.

Formats such as "raw," which can potentially attempt to read nearly any stream, should return false in order to avoid being invoked in preference to a closer match.

If source is not an instance of one of the classes returned by getInputTypes, the method should simply return false.

Annotations

@Override

Exceptions

IOException:: if an I/O error occurs while reading the stream.

createReaderInstance back to summary

createReaderInstance	back to summary
public ImageReader createReaderInstance(Object extension) throws IIOException Implements abstract javax.imageio.spi.ImageReaderSpi.createReaderInstance. Doc from javax.imageio.spi.ImageReaderSpi.createReaderInstance. Returns an instance of the `ImageReader` implementation associated with this service provider. The returned object will initially be in an initial state as if its `reset` method had been called. An `Object` may be supplied to the plug-in at construction time. The nature of the object is entirely plug-in specific. Typically, a plug-in will implement this method using code such as `return new MyImageReader(this)`. Annotations @Override

public ImageReader createReaderInstance(Object extension) throws IIOException

Implements abstract javax.imageio.spi.ImageReaderSpi.createReaderInstance.

Doc from javax.imageio.spi.ImageReaderSpi.createReaderInstance.

Returns an instance of the ImageReader implementation associated with this service provider. The returned object will initially be in an initial state as if its reset method had been called.

An Object may be supplied to the plug-in at construction time. The nature of the object is entirely plug-in specific.

Typically, a plug-in will implement this method using code such as return new MyImageReader(this).

Annotations

@Override

getDescription back to summary

getDescription	back to summary
public String getDescription(Locale locale) Implements abstract javax.imageio.spi.IIOServiceProvider.getDescription. Doc from javax.imageio.spi.IIOServiceProvider.getDescription. Returns a brief, human-readable description of this service provider and its associated implementation. The resulting string should be localized for the supplied `Locale`, if possible. Annotations @Override

public String getDescription(Locale locale)

Implements abstract javax.imageio.spi.IIOServiceProvider.getDescription.

Doc from javax.imageio.spi.IIOServiceProvider.getDescription.

Returns a brief, human-readable description of this service provider and its associated implementation. The resulting string should be localized for the supplied Locale, if possible.

Annotations

@Override

onRegistration back to summary

onRegistration	back to summary
public void onRegistration(ServiceRegistry registry, Class<?> category) Overrides javax.imageio.spi.IIOServiceProvider.onRegistration. Implements javax.imageio.spi.RegisterableService.onRegistration. Doc from javax.imageio.spi.IIOServiceProvider.onRegistration. A callback that will be called exactly once after the Spi class has been instantiated and registered in a `ServiceRegistry`. This may be used to verify that the environment is suitable for this service, for example that native libraries can be loaded. If the service cannot function in the environment where it finds itself, it should deregister itself from the registry. Only the registry should call this method. The default implementation does nothing. Annotations @Override

public void onRegistration(ServiceRegistry registry, Class<?> category)

Overrides javax.imageio.spi.IIOServiceProvider.onRegistration.

Implements javax.imageio.spi.RegisterableService.onRegistration.

Doc from javax.imageio.spi.IIOServiceProvider.onRegistration.

A callback that will be called exactly once after the Spi class has been instantiated and registered in a ServiceRegistry. This may be used to verify that the environment is suitable for this service, for example that native libraries can be loaded. If the service cannot function in the environment where it finds itself, it should deregister itself from the registry.

Only the registry should call this method.

The default implementation does nothing.

Annotations

@Override

tryReadMultiByteInteger	back to summary
private static int tryReadMultiByteInteger(ImageInputStream stream) throws IOException Reads a positive integer value encoded on a variable number of bytes, but stops the reading on end-of-file (EOF) or on integer overflow. Parameters stream:ImageInputStream the image input stream to read. Returns:int the integer value, or -1 if EOF or integer overflow.

tryReadMultiByteInteger

back to summary

private static int tryReadMultiByteInteger(ImageInputStream stream) throws IOException

Reads a positive integer value encoded on a variable number of bytes, but stops the reading on end-of-file (EOF) or on integer overflow.

Parameters

stream:ImageInputStream: the image input stream to read.

Returns:int

the integer value, or -1 if EOF or integer overflow.

public Class WBMPImageReaderSpi

Field Summary

Constructor Summary

Method Summary

Field Detail

Constructor Detail

Method Detail