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.
@param image an IIOImage object containing animage, thumbnails, and metadata to be written.
@param param an ImageWriteParam, ornull to use a default ImageWriteParam.
@exception IllegalStateException if the output has notbeen set, or prepareWriteSequence has not been called.
@exception UnsupportedOperationException ifcanWriteSequence returns false.
@exception IllegalArgumentException if image isnull.
@exception UnsupportedOperationException if imagecontains a Raster and canWriteRasters returns false.
@exception IOException if an error occurs during writing.
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