    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.util.ArrayList;
    031
    032import org.apache.commons.imaging.AbstractImageParser;
    033import org.apache.commons.imaging.ImageFormat;
    034import org.apache.commons.imaging.ImageFormats;
    035import org.apache.commons.imaging.ImageInfo;
    036import org.apache.commons.imaging.ImagingException;
    037import org.apache.commons.imaging.bytesource.ByteSource;
    038import org.apache.commons.imaging.common.ImageMetadata;
    039
    040/**
    041 * Parser for Radiance HDR images
    042 */
    043public class RgbeImageParser extends AbstractImageParser<RgbeImagingParameters> {
    044
    045    /**
    046     * Constructs a new instance with the big-endian byte order.
    047     */
    048    public RgbeImageParser() {
    049        // empty
    050    }
    051
    052    @Override
    053    protected String[] getAcceptedExtensions() {
    054        return ImageFormats.RGBE.getExtensions();
    055    }
    056
    057    @Override
    058    protected ImageFormat[] getAcceptedTypes() {
    059        return new ImageFormat[] { ImageFormats.RGBE };
    060    }
    061
    062    @Override
    063    public BufferedImage getBufferedImage(final ByteSource byteSource, final RgbeImagingParameters params) throws ImagingException, IOException {
    064        try (RgbeInfo info = new RgbeInfo(byteSource)) {
    065            // It is necessary to create our own BufferedImage here as the
    066            // org.apache.commons.imaging.common.IBufferedImageFactory interface does
    067            // not expose this complexity
    068            final DataBuffer buffer = new DataBufferFloat(info.getPixelData(), info.getWidth() * info.getHeight());
    069
    070            return new BufferedImage(
    071                    new ComponentColorModel(ColorSpace.getInstance(ColorSpace.CS_sRGB), false, false, Transparency.OPAQUE, buffer.getDataType()),
    072                    Raster.createWritableRaster(new BandedSampleModel(buffer.getDataType(), info.getWidth(), info.getHeight(), 3), buffer, new Point()), false,
    073                    null);
    074        }
    075    }
    076
    077    @Override
    078    public String getDefaultExtension() {
    079        return ImageFormats.RGBE.getDefaultExtension();
    080    }
    081
    082    @Override
    083    public RgbeImagingParameters getDefaultParameters() {
    084        return new RgbeImagingParameters();
    085    }
    086
    087    @Override
    088    public byte[] getIccProfileBytes(final ByteSource byteSource, final RgbeImagingParameters params) throws ImagingException, IOException {
    089        return null;
    090    }
    091
    092    @Override
    093    public ImageInfo getImageInfo(final ByteSource byteSource, final RgbeImagingParameters params) throws ImagingException, IOException {
    094        try (RgbeInfo info = new RgbeInfo(byteSource)) {
    095            return new ImageInfo(getName(), 32, // todo may be 64 if double?
    096                    new ArrayList<>(), ImageFormats.RGBE, getName(), info.getHeight(), "image/vnd.radiance", 1, -1, -1, -1, -1, info.getWidth(), false, false,
    097                    false, ImageInfo.ColorType.RGB, ImageInfo.CompressionAlgorithm.ADAPTIVE_RLE);
    098        }
    099    }
    100
    101    @Override
    102    public Dimension getImageSize(final ByteSource byteSource, final RgbeImagingParameters params) throws ImagingException, IOException {
    103        try (RgbeInfo info = new RgbeInfo(byteSource)) {
    104            return new Dimension(info.getWidth(), info.getHeight());
    105        }
    106    }
    107
    108    @Override
    109    public ImageMetadata getMetadata(final ByteSource byteSource, final RgbeImagingParameters params) throws ImagingException, IOException {
    110        try (RgbeInfo info = new RgbeInfo(byteSource)) {
    111            return info.getMetadata();
    112        }
    113    }
    114
    115    @Override
    116    public String getName() {
    117        return "Radiance HDR";
    118    }
    119}