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| | | /*
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| | | * Copyright 2011 gitblit.com.
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| | | *
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| | | * Licensed under the Apache License, Version 2.0 (the "License");
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| | | * you may not use this file except in compliance with the License.
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| | | * You may obtain a copy of the License at
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| | | *
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| | | * http://www.apache.org/licenses/LICENSE-2.0
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| | | *
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| | | * Unless required by applicable law or agreed to in writing, software
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| | | * distributed under the License is distributed on an "AS IS" BASIS,
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| | | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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| | | * See the License for the specific language governing permissions and
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| | | * limitations under the License.
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| | | */
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| | | package com.gitblit;
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| | |
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| | | import java.awt.Dimension;
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| | | import java.awt.Image;
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| | | import java.awt.image.BufferedImage;
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| | | import java.io.File;
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| | | import java.io.FileOutputStream;
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| | | import java.io.FilenameFilter;
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| | | import java.io.IOException;
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| | | import java.util.Iterator;
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| | | import javax.imageio.ImageIO;
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| | | import javax.imageio.ImageReader;
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| | | import javax.imageio.stream.ImageInputStream;
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| | | import com.beust.jcommander.JCommander;
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| | | import com.beust.jcommander.Parameter;
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| | | import com.beust.jcommander.ParameterException;
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| | | import com.beust.jcommander.Parameters;
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| | |
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| | | public class Thumbnailer {
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| | |
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| | | public static void main(String[] args) {
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| | | Params params = new Params();
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| | | JCommander jc = new JCommander(params);
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| | | try {
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| | | jc.parse(args);
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| | | } catch (ParameterException t) {
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| | | System.err.println(t.getMessage());
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| | | jc.usage();
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| | | }
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| | | createImageThumbnail(params.sourceFolder, params.destinationFolder, params.maximumDimension);
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| | | }
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| | |
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| | | public static void createImageThumbnail(String sourceFolder, String destinationFolder,
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| | | int maxDimension) {
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| | | if (maxDimension <= 0)
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| | | return;
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| | | File source = new File(sourceFolder);
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| | | File destination = new File(destinationFolder);
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| | | destination.mkdirs();
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| | | File[] sourceFiles = source.listFiles(new FilenameFilter() {
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| | | @Override
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| | | public boolean accept(File dir, String name) {
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| | | return name.toLowerCase().endsWith(".png");
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| | | }
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| | | });
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| | |
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| | | for (File sourceFile : sourceFiles) {
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| | | File destinationFile = new File(destination, sourceFile.getName());
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| | | try {
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| | | Dimension sz = getImageDimensions(sourceFile);
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| | | int w = 0;
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| | | int h = 0;
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| | | if (sz.width > maxDimension) {
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| | | // Scale to Width
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| | | w = maxDimension;
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| | | float f = maxDimension;
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| | | h = (int) ((f / sz.width) * sz.height); // normalize height
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| | | } else if (sz.height > maxDimension) {
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| | | // Scale to Height
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| | | h = maxDimension;
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| | | float f = maxDimension;
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| | | w = (int) ((f / sz.height) * sz.width); // normalize width
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| | | } else {
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| | | // No thumbnail
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| | | return;
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| | | }
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| | | System.out.println("Generating thumbnail for " + sourceFile.getName() + " as (" + w
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| | | + "," + h + ")");
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| | | BufferedImage image = ImageIO.read(sourceFile);
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| | | Image scaledImage = image.getScaledInstance(w, h, BufferedImage.SCALE_SMOOTH);
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| | | BufferedImage destImage = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);
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| | | destImage.createGraphics().drawImage(scaledImage, 0, 0, null);
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| | | FileOutputStream fos = new FileOutputStream(destinationFile);
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| | | ImageIO.write(destImage, "png", fos);
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| | | fos.flush();
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| | | fos.getFD().sync();
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| | | fos.close();
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| | | } catch (Throwable t) {
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| | | t.printStackTrace();
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| | | }
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| | | }
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| | | }
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| | |
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| | | public static Dimension getImageDimensions(File file) throws IOException {
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| | | ImageInputStream in = ImageIO.createImageInputStream(file);
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| | | try {
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| | | final Iterator<ImageReader> readers = ImageIO.getImageReaders(in);
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| | | if (readers.hasNext()) {
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| | | ImageReader reader = readers.next();
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| | | try {
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| | | reader.setInput(in);
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| | | return new Dimension(reader.getWidth(0), reader.getHeight(0));
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| | | } finally {
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| | | reader.dispose();
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| | | }
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| | | }
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| | | } finally {
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| | | if (in != null)
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| | | in.close();
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| | | }
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| | | return null;
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| | | }
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| | |
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| | | @Parameters(separators = " ")
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| | | private static class Params {
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| | | @Parameter(names = { "--sourceFolder" }, description = "Source folder for raw images", required = true)
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| | | public String sourceFolder;
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| | |
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| | | @Parameter(names = { "--destinationFolder" }, description = "Destination folder for thumbnails", required = true)
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| | | public String destinationFolder;
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| | | @Parameter(names = { "--maxDimension" }, description = "Maximum width or height for thumbnail", required = true)
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| | | public int maximumDimension;
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| | | }
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| | | }
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