1/*
2 * Copyright (c) 2000, 2004, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.  Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26package com.sun.imageio.plugins.jpeg;
27
28import javax.imageio.spi.ImageWriterSpi;
29import javax.imageio.spi.ServiceRegistry;
30import javax.imageio.spi.IIORegistry;
31import javax.imageio.stream.ImageOutputStream;
32import javax.imageio.ImageWriter;
33import javax.imageio.ImageTypeSpecifier;
34import javax.imageio.IIOException;
35
36import java.awt.image.ColorModel;
37import java.awt.image.IndexColorModel;
38import java.awt.image.SampleModel;
39import java.util.Locale;
40
41public class JPEGImageWriterSpi extends ImageWriterSpi {
42
43    private static String [] readerSpiNames =
44        {"com.sun.imageio.plugins.jpeg.JPEGImageReaderSpi"};
45
46    public JPEGImageWriterSpi() {
47        super(JPEG.vendor,
48              JPEG.version,
49              JPEG.names,
50              JPEG.suffixes,
51              JPEG.MIMETypes,
52              "com.sun.imageio.plugins.jpeg.JPEGImageWriter",
53              new Class<?>[] { ImageOutputStream.class },
54              readerSpiNames,
55              true,
56              JPEG.nativeStreamMetadataFormatName,
57              JPEG.nativeStreamMetadataFormatClassName,
58              null, null,
59              true,
60              JPEG.nativeImageMetadataFormatName,
61              JPEG.nativeImageMetadataFormatClassName,
62              null, null
63              );
64    }
65
66    public String getDescription(Locale locale) {
67        return "Standard JPEG Image Writer";
68    }
69
70    public boolean isFormatLossless() {
71        return false;
72    }
73
74    public boolean canEncodeImage(ImageTypeSpecifier type) {
75        SampleModel sampleModel = type.getSampleModel();
76
77        // Find the maximum bit depth across all channels
78        int[] sampleSize = sampleModel.getSampleSize();
79        int bitDepth = sampleSize[0];
80        for (int i = 1; i < sampleSize.length; i++) {
81            if (sampleSize[i] > bitDepth) {
82                bitDepth = sampleSize[i];
83            }
84        }
85
86        // 4450894: Ensure bitDepth is between 1 and 8
87        if (bitDepth < 1 || bitDepth > 8) {
88            return false;
89        }
90
91        return true;
92    }
93
94    public ImageWriter createWriterInstance(Object extension)
95        throws IIOException {
96        return new JPEGImageWriter(this);
97    }
98}
99