ImageDecoder.java
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上传日期:2018-01-04
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- /*
- * Copyright (c) 2001 Sun Microsystems, Inc. All Rights Reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * -Redistributions of source code must retain the above copyright notice, this
- * list of conditions and the following disclaimer.
- *
- * -Redistribution in binary form must reproduct the above copyright notice,
- * this list of conditions and the following disclaimer in the documentation
- * and/or other materials provided with the distribution.
- *
- * Neither the name of Sun Microsystems, Inc. or the names of contributors may
- * be used to endorse or promote products derived from this software without
- * specific prior written permission.
- *
- * This software is provided "AS IS," without a warranty of any kind. ALL
- * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING ANY
- * IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR
- * NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN AND ITS LICENSORS SHALL NOT BE
- * LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING
- * OR DISTRIBUTING THE SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR ITS
- * LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT,
- * INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER
- * CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF
- * OR INABILITY TO USE SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGES.
- *
- * You acknowledge that Software is not designed,licensed or intended for use in
- * the design, construction, operation or maintenance of any nuclear facility.
- */
- import java.awt.image.Raster;
- import java.awt.image.RenderedImage;
- import java.io.InputStream;
- import java.io.IOException;
- /**
- * An interface describing objects that transform an InputStream into a
- * BufferedImage or Raster.
- *
- * <p><b> This interface is not a committed part of the JAI API. It may
- * be removed or changed in future releases of JAI.</b>
- */
- public interface ImageDecoder {
- /**
- * Returns the current parameters as an instance of the
- * ImageDecodeParam interface. Concrete implementations of this
- * interface will return corresponding concrete implementations of
- * the ImageDecodeParam interface. For example, a JPEGImageDecoder
- * will return an instance of JPEGDecodeParam.
- */
- ImageDecodeParam getParam();
- /**
- * Sets the current parameters to an instance of the
- * ImageDecodeParam interface. Concrete implementations
- * of ImageDecoder may throw a RuntimeException if the
- * param argument is not an instance of the appropriate
- * subclass or subinterface. For example, a JPEGImageDecoder
- * will expect param to be an instance of JPEGDecodeParam.
- */
- void setParam(ImageDecodeParam param);
- /** Returns the SeekableStream associated with this ImageDecoder. */
- SeekableStream getInputStream();
- /** Returns the number of pages present in the current stream. */
- int getNumPages() throws IOException;
- /**
- * Returns a Raster that contains the decoded contents of the
- * SeekableStream associated with this ImageDecoder. Only
- * the first page of a multi-page image is decoded.
- */
- Raster decodeAsRaster() throws IOException;
- /**
- * Returns a Raster that contains the decoded contents of the
- * SeekableStream associated with this ImageDecoder.
- * The given page of a multi-page image is decoded. If
- * the page does not exist, an IOException will be thrown.
- * Page numbering begins at zero.
- *
- * @param page The page to be decoded.
- */
- Raster decodeAsRaster(int page) throws IOException;
- /**
- * Returns a RenderedImage that contains the decoded contents of the
- * SeekableStream associated with this ImageDecoder. Only
- * the first page of a multi-page image is decoded.
- */
- RenderedImage decodeAsRenderedImage() throws IOException;
- /**
- * Returns a RenderedImage that contains the decoded contents of the
- * SeekableStream associated with this ImageDecoder.
- * The given page of a multi-page image is decoded. If
- * the page does not exist, an IOException will be thrown.
- * Page numbering begins at zero.
- *
- * @param page The page to be decoded.
- */
- RenderedImage decodeAsRenderedImage(int page) throws IOException;
- }