001/*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.apache.commons.imaging.formats.rgbe;
018
019import java.awt.Dimension;
020import java.awt.Point;
021import java.awt.Transparency;
022import java.awt.color.ColorSpace;
023import java.awt.image.BandedSampleModel;
024import java.awt.image.BufferedImage;
025import java.awt.image.ComponentColorModel;
026import java.awt.image.DataBuffer;
027import java.awt.image.DataBufferFloat;
028import java.awt.image.Raster;
029import java.io.IOException;
030import java.nio.ByteOrder;
031import java.util.ArrayList;
032import java.util.Map;
033
034import org.apache.commons.imaging.ImageFormat;
035import org.apache.commons.imaging.ImageFormats;
036import org.apache.commons.imaging.ImageInfo;
037import org.apache.commons.imaging.ImageParser;
038import org.apache.commons.imaging.ImageReadException;
039import org.apache.commons.imaging.common.ImageMetadata;
040import org.apache.commons.imaging.common.bytesource.ByteSource;
041
042/**
043 * Parser for Radiance HDR images
044 *
045 * @author <a href="mailto:peter@electrotank.com">peter royal</a>
046 */
047public class RgbeImageParser extends ImageParser {
048
049    public RgbeImageParser() {
050        setByteOrder(ByteOrder.BIG_ENDIAN);
051    }
052
053    @Override
054    public String getName() {
055        return "Radiance HDR";
056    }
057
058    @Override
059    public String getDefaultExtension() {
060        return ".hdr";
061    }
062
063    @Override
064    protected String[] getAcceptedExtensions() {
065        return new String[] { ".hdr", ".pic" };
066    }
067
068    @Override
069    protected ImageFormat[] getAcceptedTypes() {
070        return new ImageFormat[] { ImageFormats.RGBE };
071    }
072
073    @Override
074    public ImageMetadata getMetadata(final ByteSource byteSource, final Map<String, Object> params)
075            throws ImageReadException, IOException {
076        try (RgbeInfo info = new RgbeInfo(byteSource)) {
077            final ImageMetadata ret = info.getMetadata();
078            return ret;
079        }
080    }
081
082    @Override
083    public ImageInfo getImageInfo(final ByteSource byteSource, final Map<String, Object> params)
084            throws ImageReadException, IOException {
085        try (RgbeInfo info = new RgbeInfo(byteSource)) {
086            return new ImageInfo(
087                    getName(),
088                    32, // todo may be 64 if double?
089                    new ArrayList<String>(), ImageFormats.RGBE, getName(),
090                    info.getHeight(), "image/vnd.radiance", 1, -1, -1, -1, -1,
091                    info.getWidth(), false, false, false,
092                    ImageInfo.ColorType.RGB, ImageInfo.CompressionAlgorithm.ADAPTIVE_RLE);
093        }
094    }
095
096    @Override
097    public BufferedImage getBufferedImage(final ByteSource byteSource, final Map<String, Object> params)
098            throws ImageReadException, IOException {
099        try (RgbeInfo info = new RgbeInfo(byteSource)) {
100            // It is necessary to create our own BufferedImage here as the
101            // org.apache.commons.imaging.common.IBufferedImageFactory interface does
102            // not expose this complexity
103            final DataBuffer buffer = new DataBufferFloat(info.getPixelData(),
104                    info.getWidth() * info.getHeight());
105
106            final BufferedImage ret = new BufferedImage(new ComponentColorModel(
107                    ColorSpace.getInstance(ColorSpace.CS_sRGB), false, false,
108                    Transparency.OPAQUE, buffer.getDataType()),
109                    Raster.createWritableRaster(
110                            new BandedSampleModel(buffer.getDataType(),
111                                    info.getWidth(), info.getHeight(), 3),
112                            buffer,
113                            new Point()), false, null);
114            return ret;
115        }
116    }
117
118    @Override
119    public Dimension getImageSize(final ByteSource byteSource, final Map<String, Object> params)
120            throws ImageReadException, IOException {
121        try (RgbeInfo info = new RgbeInfo(byteSource)) {
122            final Dimension ret = new Dimension(info.getWidth(), info.getHeight());
123            return ret;
124        }
125    }
126
127    @Override
128    public byte[] getICCProfileBytes(final ByteSource byteSource, final Map<String, Object> params)
129            throws ImageReadException, IOException {
130        return null;
131    }
132}