| 1 | // Jomic - a viewer for comic book archives. |
| 2 | // Copyright (C) 2004-2011 Thomas Aglassinger |
| 3 | // |
| 4 | // This program is free software: you can redistribute it and/or modify |
| 5 | // it under the terms of the GNU General Public License as published by |
| 6 | // the Free Software Foundation, either version 3 of the License, or |
| 7 | // (at your option) any later version. |
| 8 | // |
| 9 | // This program is distributed in the hope that it will be useful, |
| 10 | // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | // GNU General Public License for more details. |
| 13 | // |
| 14 | // You should have received a copy of the GNU General Public License |
| 15 | // along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 16 | package net.sf.jomic.comic; |
| 17 | |
| 18 | import java.awt.image.RenderedImage; |
| 19 | import java.io.File; |
| 20 | import java.io.IOException; |
| 21 | import java.util.Iterator; |
| 22 | |
| 23 | import javax.imageio.ImageIO; |
| 24 | import javax.imageio.ImageWriter; |
| 25 | import javax.imageio.stream.ImageOutputStream; |
| 26 | |
| 27 | import net.sf.jomic.tools.AbstractTask; |
| 28 | import net.sf.jomic.tools.FileTools; |
| 29 | import net.sf.jomic.tools.CopyFileTask; |
| 30 | import net.sf.jomic.tools.ImageTools; |
| 31 | import net.sf.jomic.tools.ProgressChangeListener; |
| 32 | import net.sf.jomic.tools.Task; |
| 33 | |
| 34 | /** |
| 35 | * Task to convert a source image to a target image according to a <code>Conversion</code>. |
| 36 | * |
| 37 | * @author Thomas Aglassinger |
| 38 | * @see Conversion |
| 39 | */ |
| 40 | public class ConvertImageTask extends AbstractTask implements ProgressChangeListener |
| 41 | { |
| 42 | private static final int STEP_COUNT = 3; |
| 43 | private Conversion conversion; |
| 44 | private FileTools fileTools; |
| 45 | private ImageTools imageTools; |
| 46 | private File sourceImageFile; |
| 47 | private File targetImageFile; |
| 48 | |
| 49 | public ConvertImageTask(File newSourceImageFile, File newTargetImageFile, Conversion newConversion) { |
| 50 | super(); |
| 51 | assert newSourceImageFile != null; |
| 52 | assert newTargetImageFile != null; |
| 53 | assert newConversion != null; |
| 54 | fileTools = FileTools.instance(); |
| 55 | imageTools = ImageTools.instance(); |
| 56 | sourceImageFile = newSourceImageFile; |
| 57 | targetImageFile = newTargetImageFile; |
| 58 | conversion = newConversion; |
| 59 | setMaxProgress(sourceImageFile.length()); |
| 60 | } |
| 61 | |
| 62 | private ImageWriter getWriterForSuffix(String suffix) { |
| 63 | assert suffix != null; |
| 64 | Iterator writers = ImageIO.getImageWritersByFormatName(suffix); |
| 65 | ImageWriter result = (ImageWriter) writers.next(); |
| 66 | |
| 67 | return result; |
| 68 | } |
| 69 | |
| 70 | /** |
| 71 | * In case the image just needs to be copied, set progress to value from <code>CopyFileTask</code> |
| 72 | * . |
| 73 | * |
| 74 | * @see CopyFileTask |
| 75 | */ |
| 76 | public void progressChanged(Task source) { |
| 77 | setProgress(source.getProgress()); |
| 78 | } |
| 79 | |
| 80 | public void start() |
| 81 | throws IOException { |
| 82 | RenderedImage image = null; |
| 83 | String writerSuffix = fileTools.getSuffix(sourceImageFile); |
| 84 | // TODO: if no writer can be found, use PNG |
| 85 | // TODO: dispose both ImageWriters properly (using finally) |
| 86 | ImageWriter imageWriter = getWriterForSuffix(writerSuffix); |
| 87 | boolean justCopy = true; |
| 88 | |
| 89 | setProgress(0); |
| 90 | if (conversion.isLimitImageSize()) { |
| 91 | image = imageTools.readImage(sourceImageFile); |
| 92 | setProgress(getMaxProgress() / STEP_COUNT); |
| 93 | |
| 94 | boolean needsResize = false; |
| 95 | int maxImageHeight = conversion.getMaxImageHeight(); |
| 96 | |
| 97 | if (image.getHeight() > maxImageHeight) { |
| 98 | needsResize = true; |
| 99 | } |
| 100 | int maxImageWidth = conversion.getMaxImageWidth(); |
| 101 | |
| 102 | if (image.getWidth() > maxImageWidth) { |
| 103 | needsResize = true; |
| 104 | } |
| 105 | if (needsResize) { |
| 106 | image = imageTools.getSqueezed(image, maxImageWidth, maxImageHeight, ImageTools.SCALE_FIT); |
| 107 | setProgress(2 * getMaxProgress() / STEP_COUNT); |
| 108 | justCopy = false; |
| 109 | } |
| 110 | } |
| 111 | String targetSuffix = conversion.getImageFormat(); |
| 112 | |
| 113 | if (!targetSuffix.equals(Conversion.IMAGE_FORMAT_PRESERVE)) { |
| 114 | ImageWriter requestedSuffixWriter = getWriterForSuffix(targetSuffix); |
| 115 | |
| 116 | if (!requestedSuffixWriter.equals(imageWriter)) { |
| 117 | imageWriter.dispose(); |
| 118 | imageWriter = requestedSuffixWriter; |
| 119 | justCopy = false; |
| 120 | } else { |
| 121 | requestedSuffixWriter.dispose(); |
| 122 | } |
| 123 | } |
| 124 | if (justCopy) { |
| 125 | CopyFileTask copyFileTask = new CopyFileTask(sourceImageFile, targetImageFile); |
| 126 | |
| 127 | copyFileTask.addProgressChangeListener(this); |
| 128 | try { |
| 129 | copyFileTask.start(); |
| 130 | } finally { |
| 131 | copyFileTask.removeProgressChangeListener(this); |
| 132 | } |
| 133 | } else { |
| 134 | if (image == null) { |
| 135 | image = imageTools.readImage(sourceImageFile); |
| 136 | setProgress(getMaxProgress() / 2); |
| 137 | } |
| 138 | try { |
| 139 | writeImage(image, imageWriter); |
| 140 | } finally { |
| 141 | imageWriter.dispose(); |
| 142 | } |
| 143 | } |
| 144 | setProgress(getMaxProgress()); |
| 145 | } |
| 146 | |
| 147 | private void writeImage(RenderedImage image, ImageWriter imageWriter) |
| 148 | throws IOException { |
| 149 | ImageOutputStream ios = ImageIO.createImageOutputStream(targetImageFile); |
| 150 | |
| 151 | try { |
| 152 | imageWriter.setOutput(ios); |
| 153 | imageWriter.write(image); |
| 154 | } finally { |
| 155 | ios.close(); |
| 156 | } |
| 157 | } |
| 158 | } |