Magnolia Imaging Module 3.2.3
File DefaultImageStreamer.java
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| Class | Line # | Actions | |||||
|---|---|---|---|---|---|---|---|
| DefaultImageStreamer | 57 | 17 | 0% | 3 | 2 |
Contributing tests
This file is covered by 34 tests.
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| 1 | /** | |
| 2 | * This file Copyright (c) 2009-2015 Magnolia International | |
| 3 | * Ltd. (http://www.magnolia-cms.com). All rights reserved. | |
| 4 | * | |
| 5 | * | |
| 6 | * This file is dual-licensed under both the Magnolia | |
| 7 | * Network Agreement and the GNU General Public License. | |
| 8 | * You may elect to use one or the other of these licenses. | |
| 9 | * | |
| 10 | * This file is distributed in the hope that it will be | |
| 11 | * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the | |
| 12 | * implied warranty of MERCHANTABILITY or FITNESS FOR A | |
| 13 | * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT. | |
| 14 | * Redistribution, except as permitted by whichever of the GPL | |
| 15 | * or MNA you select, is prohibited. | |
| 16 | * | |
| 17 | * 1. For the GPL license (GPL), you can redistribute and/or | |
| 18 | * modify this file under the terms of the GNU General | |
| 19 | * Public License, Version 3, as published by the Free Software | |
| 20 | * Foundation. You should have received a copy of the GNU | |
| 21 | * General Public License, Version 3 along with this program; | |
| 22 | * if not, write to the Free Software Foundation, Inc., 51 | |
| 23 | * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 24 | * | |
| 25 | * 2. For the Magnolia Network Agreement (MNA), this file | |
| 26 | * and the accompanying materials are made available under the | |
| 27 | * terms of the MNA which accompanies this distribution, and | |
| 28 | * is available at http://www.magnolia-cms.com/mna.html | |
| 29 | * | |
| 30 | * Any modifications to this file must keep this entire header | |
| 31 | * intact. | |
| 32 | * | |
| 33 | */ | |
| 34 | package info.magnolia.imaging; | |
| 35 | ||
| 36 | import info.magnolia.imaging.util.ImageUtil; | |
| 37 | ||
| 38 | import java.awt.image.BufferedImage; | |
| 39 | import java.io.IOException; | |
| 40 | import java.io.OutputStream; | |
| 41 | import java.util.Iterator; | |
| 42 | ||
| 43 | import javax.imageio.IIOImage; | |
| 44 | import javax.imageio.ImageIO; | |
| 45 | import javax.imageio.ImageTypeSpecifier; | |
| 46 | import javax.imageio.ImageWriteParam; | |
| 47 | import javax.imageio.ImageWriter; | |
| 48 | import javax.imageio.stream.ImageOutputStream; | |
| 49 | ||
| 50 | /** | |
| 51 | * An ImageStreamer implementation which always generates the image. | |
| 52 | * It also knows about some of the javax.imageio quirks, so other | |
| 53 | * implementations should consider subclassing or wrapping it. | |
| 54 | * | |
| 55 | * @param <P> type of ParameterProvider's parameter | |
| 56 | */ | |
| 57 | public class DefaultImageStreamer<P> implements ImageStreamer<P> { | |
| 58 | ||
| 59 | 12 |  @Override |
| 60 | public void serveImage(ImageGenerator<ParameterProvider<P>> generator, ParameterProvider<P> params, OutputStream out) throws ImagingException, IOException { | |
| 61 | 12 | final BufferedImage img = generator.generate(params); |
| 62 | ||
| 63 | 12 | OutputFormat outputFormat = generator.getOutputFormat(params); |
| 64 | ||
| 65 | // if source is transparent and format doesn't support transparency, we have to do some handy work | |
| 66 | 12 | final BufferedImage fixedImg = ImageUtil.flattenTransparentImageForOpaqueFormat(img, outputFormat); |
| 67 | ||
| 68 | 12 | write(fixedImg, out, outputFormat); |
| 69 | } | |
| 70 | ||
| 71 | 46 | protected void write(final BufferedImage img, final OutputStream out, final OutputFormat outputFormat) throws IOException { |
| 72 | // this is factored out of ImageIO.write() to allow customization of the ImageWriteParam | |
| 73 | 46 | final ImageOutputStream imgOut = ImageIO.createImageOutputStream(out); |
| 74 | 46 | final ImageTypeSpecifier imgType = ImageTypeSpecifier.createFromRenderedImage(img); |
| 75 | 46 | final Iterator<ImageWriter> iter = ImageIO.getImageWriters(imgType, outputFormat.getFormatName()); |
| 76 | 46 | if (!iter.hasNext()) { |
| 77 | 0 | throw new IllegalStateException("Can't find ImageWriter for " + outputFormat.getFormatName()); |
| 78 | } | |
| 79 | 46 | final ImageWriter imageWriter = iter.next(); |
| 80 | 46 | final ImageWriteParam params = imageWriter.getDefaultWriteParam(); |
| 81 | ||
| 82 | 46 | outputFormat.applyTo(params); |
| 83 | 46 | imageWriter.setOutput(imgOut); |
| 84 | ||
| 85 | 46 | imageWriter.write(null, new IIOImage(img, null, null), params); |
| 86 | 46 | imageWriter.dispose(); |
| 87 | 46 | imgOut.flush(); |
| 88 | 46 | imgOut.close(); |
| 89 | } | |
| 90 | ||
| 91 | } |