2 * Meviz - Various tools collection to work with multimedia.
3 * Copyright (C) 2012 -- 2018, Svjatoslav Agejenko, svjatoslav@svjatoslav.eu
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of version 2 of the GNU General Public License
7 * as published by the Free Software Foundation.
10 package eu.svjatoslav.meviz.htmlindexer.metadata.fileTypes;
12 import eu.svjatoslav.commons.file.FilePathParser;
13 import eu.svjatoslav.meviz.htmlindexer.Constants;
14 import eu.svjatoslav.meviz.htmlindexer.Utils;
15 import eu.svjatoslav.meviz.htmlindexer.metadata.Dimension;
17 import javax.imageio.ImageIO;
20 import java.awt.image.BufferedImage;
21 import java.awt.image.FilteredImageSource;
22 import java.awt.image.ImageFilter;
23 import java.awt.image.ImageProducer;
25 import java.io.FileOutputStream;
26 import java.io.OutputStream;
27 import java.util.ArrayList;
28 import java.util.List;
30 public class Picture extends AbstractFile {
32 private static final long serialVersionUID = -4156533490858298387L;
36 private Dimension dimensions;
38 public Picture(final File parentDirectory, final String fileName)
40 super(parentDirectory, fileName);
43 private static void ensureNonzeroImageArea(final java.awt.Dimension result) {
46 if (result.height < 1)
51 * Actual returned target thumbnail size will be adjusted from desired one
52 * by attempting to generate as large as possible thumbnail, while not
53 * exceeding provided thumbnail width and height, and preserving aspect
54 * ratio of original image.
56 private static java.awt.Dimension getTargetThumbnailDimension(
57 final java.awt.Dimension originalImageDimension,
58 final java.awt.Dimension desiredTargetDimension) {
60 final double thumbWidthToHeightRatio = (double) desiredTargetDimension.width
61 / (double) desiredTargetDimension.height;
62 final double inputImageWidthToHeightRatio = (double) originalImageDimension.width
63 / (double) originalImageDimension.height;
65 if (thumbWidthToHeightRatio < inputImageWidthToHeightRatio) {
67 final java.awt.Dimension result = new java.awt.Dimension(
68 desiredTargetDimension.width,
69 (int) (desiredTargetDimension.width / inputImageWidthToHeightRatio));
71 ensureNonzeroImageArea(result);
76 final java.awt.Dimension result = new java.awt.Dimension(
77 (int) (desiredTargetDimension.height * inputImageWidthToHeightRatio),
78 desiredTargetDimension.height);
80 ensureNonzeroImageArea(result);
87 * Propose list of thumbnail dimensions.
89 public static List<Dimension> getThumbnailDimensions(Dimension current) {
90 final ArrayList<Dimension> result = new ArrayList<>();
93 while (current.getArea() > 1000000) {
94 current = current.getScaled(0.5d);
102 public static void makeThumbnail(final File inputFile,
103 final File outputFile,
104 final java.awt.Dimension preferredTargetDimensions) {
108 final BufferedImage inputImage = Utils.getBufferedImage(inputFile);
110 final java.awt.Dimension sourceImageDimension = new java.awt.Dimension(
111 inputImage.getWidth(), inputImage.getHeight());
113 final java.awt.Dimension targetDimensions = getTargetThumbnailDimension(
114 sourceImageDimension, preferredTargetDimensions);
116 final OutputStream out = new FileOutputStream(outputFile);
118 final Image scaledImage = scaleImage(inputImage,
119 targetDimensions.width, targetDimensions.height);
121 final BufferedImage bufferedImage = new BufferedImage(
122 scaledImage.getWidth(null), scaledImage.getHeight(null),
123 BufferedImage.TYPE_INT_RGB);
125 final Graphics2D g = bufferedImage.createGraphics();
126 g.drawImage(scaledImage, 0, 0, null);
129 ImageIO.write(bufferedImage, "jpg", out);
132 } catch (final Exception exception) {
133 System.out.println(exception.toString());
134 exception.printStackTrace();
139 * @return new image scaled to desired dimensions
141 private static Image scaleImage(final Image srcImage, final int width,
144 final ImageFilter filter = new java.awt.image.AreaAveragingScaleFilter(
147 final ImageProducer prod = new FilteredImageSource(
148 srcImage.getSource(), filter);
150 final Image newImage = Toolkit.getDefaultToolkit().createImage(prod);
152 return new ImageIcon(newImage).getImage();
155 private String computeThumbnailHash(final Dimension targetDimension) {
157 // compute new thumbnails hash number
158 final String forMagicHash = fileName + " "
159 + String.valueOf(targetDimension.width) + " "
160 + String.valueOf(targetDimension.height) + " "
161 + String.valueOf(getFileLength()) + " "
162 + Constants.THUMBNAIL_VERSION;
164 // System.out.println("Computing hash from: " + forMagicHash);
165 return Utils.getStringCrcAsHex(forMagicHash);
168 public Dimension getDimensions() {
173 * Get thumbnail file name for this image and desired thumbnail dimensions
174 * relative to designated thumbnails directory within parent directory.
176 public String getRelativeThumbnailFileName(final Dimension targetDimension) {
177 return FilePathParser.getFileNameWithoutExtension(fileName) + " ("
178 + computeThumbnailHash(targetDimension) + ").jpeg";
182 public void updateFileMetainfo(final File parentDirectory) throws Exception {
183 final BufferedImage image = Utils
184 .getBufferedImage(getFile(parentDirectory));
185 dimensions = new Dimension(image.getWidth(), image.getHeight());