Source Code Cross Referenced for ImageDecoder.java in  » 6.0-JDK-Modules » Java-Advanced-Imaging » com » sun » media » jai » codec » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » 6.0 JDK Modules » Java Advanced Imaging » com.sun.media.jai.codec 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


01:        /*
02:         * $RCSfile: ImageDecoder.java,v $
03:         *
04:         * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
05:         *
06:         * Use is subject to license terms.
07:         *
08:         * $Revision: 1.1 $
09:         * $Date: 2005/02/11 04:55:30 $
10:         * $State: Exp $
11:         */
12:        package com.sun.media.jai.codec;
13:
14:        import java.awt.image.Raster;
15:        import java.awt.image.RenderedImage;
16:        import java.io.InputStream;
17:        import java.io.IOException;
18:
19:        /**
20:         * An interface describing objects that transform an InputStream into a
21:         * BufferedImage or Raster.
22:         *
23:         * <p><b> This interface is not a committed part of the JAI API.  It may
24:         * be removed or changed in future releases of JAI.</b>
25:         */
26:        public interface ImageDecoder {
27:
28:            /**
29:             * Returns the current parameters as an instance of the
30:             * ImageDecodeParam interface.  Concrete implementations of this
31:             * interface will return corresponding concrete implementations of
32:             * the ImageDecodeParam interface.  For example, a JPEGImageDecoder
33:             * will return an instance of JPEGDecodeParam.
34:             */
35:            ImageDecodeParam getParam();
36:
37:            /**
38:             * Sets the current parameters to an instance of the 
39:             * ImageDecodeParam interface.  Concrete implementations
40:             * of ImageDecoder may throw a RuntimeException if the
41:             * param argument is not an instance of the appropriate
42:             * subclass or subinterface.  For example, a JPEGImageDecoder
43:             * will expect param to be an instance of JPEGDecodeParam.
44:             */
45:            void setParam(ImageDecodeParam param);
46:
47:            /** Returns the SeekableStream associated with this ImageDecoder. */
48:            SeekableStream getInputStream();
49:
50:            /** Returns the number of pages present in the current stream. */
51:            int getNumPages() throws IOException;
52:
53:            /**
54:             * Returns a Raster that contains the decoded contents of the
55:             * SeekableStream associated with this ImageDecoder.  Only
56:             * the first page of a multi-page image is decoded.
57:             */
58:            Raster decodeAsRaster() throws IOException;
59:
60:            /**
61:             * Returns a Raster that contains the decoded contents of the
62:             * SeekableStream associated with this ImageDecoder.
63:             * The given page of a multi-page image is decoded.  If
64:             * the page does not exist, an IOException will be thrown.
65:             * Page numbering begins at zero.
66:             *
67:             * @param page The page to be decoded.
68:             */
69:            Raster decodeAsRaster(int page) throws IOException;
70:
71:            /**
72:             * Returns a RenderedImage that contains the decoded contents of the
73:             * SeekableStream associated with this ImageDecoder.  Only
74:             * the first page of a multi-page image is decoded.
75:             */
76:            RenderedImage decodeAsRenderedImage() throws IOException;
77:
78:            /**
79:             * Returns a RenderedImage that contains the decoded contents of the
80:             * SeekableStream associated with this ImageDecoder.
81:             * The given page of a multi-page image is decoded.  If
82:             * the page does not exist, an IOException will be thrown.
83:             * Page numbering begins at zero.
84:             *
85:             * @param page The page to be decoded.
86:             */
87:            RenderedImage decodeAsRenderedImage(int page) throws IOException;
88:        }
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