2 * Meviz - Various tools collection to work with multimedia.
3 * Copyright (C) 2012 -- 2019, 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 3 of the GNU Lesser General Public License
7 * or later 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.commons.file.IOHelper;
14 import eu.svjatoslav.meviz.htmlindexer.Constants;
15 import eu.svjatoslav.meviz.htmlindexer.GifSequenceWriter;
16 import eu.svjatoslav.meviz.htmlindexer.ImageFormatError;
17 import eu.svjatoslav.meviz.htmlindexer.Utils;
18 import eu.svjatoslav.meviz.htmlindexer.metadata.Dimension;
20 import javax.imageio.ImageIO;
21 import javax.imageio.ImageReader;
22 import javax.imageio.stream.FileImageOutputStream;
23 import javax.imageio.stream.ImageInputStream;
24 import javax.imageio.stream.ImageOutputStream;
27 import java.awt.image.BufferedImage;
28 import java.awt.image.FilteredImageSource;
29 import java.awt.image.ImageFilter;
30 import java.awt.image.ImageProducer;
32 import java.util.ArrayList;
33 import java.util.List;
35 import static eu.svjatoslav.meviz.htmlindexer.Utils.getBufferedImage;
36 import static java.awt.image.BufferedImage.TYPE_INT_RGB;
38 public class Picture extends AbstractFile {
40 private static final long serialVersionUID = -4156533490858298387L;
44 private Dimension dimensions;
46 public Picture(final File parentDirectory, final String fileName)
48 super(parentDirectory, fileName);
51 private static void ensureNonzeroImageArea(final java.awt.Dimension result) {
54 if (result.height < 1)
59 * Actual returned target thumbnail size will be adjusted from desired one
60 * by attempting to generate as large as possible thumbnail, while not
61 * exceeding provided thumbnail width and height, and preserving aspect
62 * ratio of original image.
64 private static java.awt.Dimension getTargetThumbnailDimension(
65 final java.awt.Dimension originalImageDimension,
66 final java.awt.Dimension desiredTargetDimension) {
68 final double thumbWidthToHeightRatio = (double) desiredTargetDimension.width
69 / (double) desiredTargetDimension.height;
70 final double inputImageWidthToHeightRatio = (double) originalImageDimension.width
71 / (double) originalImageDimension.height;
73 if (thumbWidthToHeightRatio < inputImageWidthToHeightRatio) {
75 final java.awt.Dimension result = new java.awt.Dimension(
76 desiredTargetDimension.width,
77 (int) (desiredTargetDimension.width / inputImageWidthToHeightRatio));
79 ensureNonzeroImageArea(result);
84 final java.awt.Dimension result = new java.awt.Dimension(
85 (int) (desiredTargetDimension.height * inputImageWidthToHeightRatio),
86 desiredTargetDimension.height);
88 ensureNonzeroImageArea(result);
95 * Propose list of thumbnail dimensions.
97 public static List<Dimension> getThumbnailDimensions(Dimension current) {
98 final ArrayList<Dimension> result = new ArrayList<>();
101 while (current.getArea() > 1000000) {
102 current = current.getScaled(0.5d);
110 public static void makeThumbnail(final File inputFile,
111 final File outputFile,
112 final java.awt.Dimension preferredTargetDimensions) {
114 String fileExtension = FilePathParser.getFileExtension(inputFile.getName());
117 if ("gif".equalsIgnoreCase(fileExtension))
118 makeGifThumbnail(inputFile, outputFile, preferredTargetDimensions);
120 makeJpegThumbnail(inputFile, outputFile, preferredTargetDimensions);
121 } catch (final Exception exception) {
122 System.out.println(exception.toString());
123 exception.printStackTrace();
127 private static void makeJpegThumbnail(File inputFile, File outputFile, java.awt.Dimension preferredTargetDimensions)
128 throws IOException, ImageFormatError {
130 final BufferedImage inputImage = getBufferedImage(inputFile);
132 final java.awt.Dimension sourceImageDimension = new java.awt.Dimension(
133 inputImage.getWidth(), inputImage.getHeight());
135 final java.awt.Dimension targetDimensions = getTargetThumbnailDimension(
136 sourceImageDimension, preferredTargetDimensions);
138 final OutputStream out = new FileOutputStream(outputFile);
140 final Image scaledImage = scaleImage(inputImage,
141 targetDimensions.width, targetDimensions.height);
143 final BufferedImage bufferedImage = new BufferedImage(
144 scaledImage.getWidth(null), scaledImage.getHeight(null),
147 final Graphics2D g = bufferedImage.createGraphics();
148 g.drawImage(scaledImage, 0, 0, null);
151 ImageIO.write(bufferedImage, "jpg", out);
155 private static void makeGifThumbnail(
156 File inputFile, File outputFile, java.awt.Dimension preferredTargetDimensions) throws IOException {
157 ImageIcon imageIcon = new ImageIcon(IOHelper.getFileContents(inputFile));
159 final java.awt.Dimension sourceImageDimension = new java.awt.Dimension(
160 imageIcon.getIconWidth(), imageIcon.getIconHeight());
162 System.out.println("Source image dimensions:" + sourceImageDimension);
164 final java.awt.Dimension targetDimensions = getTargetThumbnailDimension(
165 sourceImageDimension, preferredTargetDimensions);
167 System.out.println("Desired target image dimensions:" + targetDimensions);
169 FileInputStream fiStream = new FileInputStream( inputFile );
171 ImageReader reader = ImageIO.getImageReadersByFormatName("gif").next();
172 ImageInputStream stream = ImageIO.createImageInputStream(inputFile);
173 reader.setInput(stream);
175 Utils.ImageFrame[] frames = Utils.readGIF(reader);
176 for (Utils.ImageFrame frame : frames) {
177 Image scaleImage = scaleImage(frame.image, targetDimensions.width, targetDimensions.height);
178 BufferedImage bimage = new BufferedImage(
179 targetDimensions.width, targetDimensions.height, BufferedImage.TYPE_INT_ARGB);
180 Graphics2D bGr = bimage.createGraphics();
181 bGr.drawImage(scaleImage, 0, 0, null);
183 frame.image = bimage;
186 ImageOutputStream output = new FileImageOutputStream(outputFile );
188 GifSequenceWriter writer =
189 new GifSequenceWriter( output, frames[0].image.getType(), frames[0].getDelay(), true );
191 writer.writeToSequence( frames[0].image );
192 for ( int i = 1; i < frames.length; i++ ) {
193 BufferedImage nextImage = frames[i].image;
194 writer.writeToSequence( nextImage );
202 * @return new image scaled to desired dimensions
204 private static Image scaleImage(final Image srcImage, final int width,
207 final ImageFilter filter = new java.awt.image.AreaAveragingScaleFilter(
210 final ImageProducer prod = new FilteredImageSource(
211 srcImage.getSource(), filter);
213 final Image newImage = Toolkit.getDefaultToolkit().createImage(prod);
215 return new ImageIcon(newImage).getImage();
218 private String computeThumbnailHash(final Dimension targetDimension) {
220 // compute new thumbnails hash number
221 final String forMagicHash = fileName + " "
222 + targetDimension.width + " "
223 + targetDimension.height + " "
224 + getFileLength() + " "
225 + Constants.THUMBNAIL_VERSION;
227 return Utils.getStringCrcAsHex(forMagicHash);
230 public Dimension getDimensions() {
235 * Get thumbnail file name for this image and desired thumbnail dimensions
236 * relative to designated thumbnails directory within parent directory.
238 public String getRelativeThumbnailFileName(final Dimension targetDimension) {
239 return FilePathParser.getFileNameWithoutExtension(fileName) + " ("
240 + computeThumbnailHash(targetDimension) + ")." + getFileExtension();
244 public void updateFileMetadata(final File parentDirectory) throws Exception {
245 final BufferedImage image = getBufferedImage(getFile(parentDirectory));
246 dimensions = new Dimension(image.getWidth(), image.getHeight());