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/**
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* copy-image-resizer
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* Copyright © 2014 František Kučera (frantovo.cz)
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package cz.frantovo.copyImageResizer;
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import cz.frantovo.copyImageResizer.SingleImageResizer.ImageFormat;
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import java.awt.image.BufferedImage;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.FileNotFoundException;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import java.nio.channels.FileChannel;
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import java.util.logging.Level;
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import java.util.logging.Logger;
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import javax.imageio.ImageIO;
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/**
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*
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* @author Ing. František Kučera (frantovo.cz)
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*/
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public class RecursiveImageResizer {
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private static final Logger log = Logger.getLogger(RecursiveImageResizer.class.getName());
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private final Counters counters = new Counters();
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private final SingleImageResizer resizer = new SingleImageResizer();
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private final RecursiveOptions options;
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public RecursiveImageResizer(RecursiveOptions options) {
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this.options = options;
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}
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public Counters resize() throws RecursiveException, ResizeException {
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resizeDirectory(options.getInput());
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return counters;
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}
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private void resizeFile(File inputFile) throws ResizeException {
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File inputFileRelative = relativize(options.getInput(), inputFile);
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log.log(Level.FINER, "Resizing file: {0}", inputFileRelative);
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counters.increment(Counters.COUNTER_TYPE.FILES);
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ImageFormat format = ImageFormat.getMatching(inputFile.getName());
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if (format == null) {
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log.log(Level.FINER, "Skipping file: {0} (no image format matched this extension)", inputFileRelative);
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counters.increment(Counters.COUNTER_TYPE.SKIPPED_UNKNOWN_EXTENSION);
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} else {
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try {
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for (SizeSpecification size : options.getSizes()) {
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File sizeRoot = new File(options.getOutput(), size.getDirectory());
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File outputFile = new File(sizeRoot, inputFileRelative.getPath());
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try (FileInputStream input = new FileInputStream(inputFile)) {
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BufferedImage image = readImage(input);
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if (shouldResize(image, size)) {
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try (FileOutputStream output = new FileOutputStream(outputFile)) {
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resizer.resize(image, output, size, format);
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counters.increment(Counters.COUNTER_TYPE.RESIZED);
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}
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} else {
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log.log(Level.FINER, "File: {0} has already required (or smaller) size → just copy", inputFileRelative);
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justCopy(inputFile, outputFile);
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counters.increment(Counters.COUNTER_TYPE.JUST_COPIED);
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}
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}
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}
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} catch (FileNotFoundException e) {
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throw new ResizeException("Error while opening stream", e);
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} catch (IOException e) {
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throw new ResizeException("Error while closing stream", e);
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}
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}
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}
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private static boolean shouldResize(BufferedImage input, SizeSpecification requested) {
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if (requested.isResizeSmaller()) {
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return input.getHeight() != requested.getHeight() || input.getWidth() != requested.getWidth();
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} else {
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return input.getHeight() > requested.getHeight() || input.getWidth() > requested.getWidth();
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}
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}
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private static BufferedImage readImage(InputStream input) throws ResizeException {
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try {
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return ImageIO.read(input);
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} catch (IOException e) {
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throw new ResizeException("Unable to read image from stream", e);
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}
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}
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private static void justCopy(File inputFile, File outputFile) throws ResizeException {
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try {
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if (!outputFile.exists()) {
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outputFile.createNewFile();
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}
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try (FileChannel input = new FileInputStream(inputFile).getChannel()) {
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try (FileChannel output = new FileOutputStream(outputFile).getChannel()) {
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output.transferFrom(input, 0, input.size());
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}
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}
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} catch (IOException e) {
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throw new ResizeException("Unable copy stream/channel", e);
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}
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}
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private void resizeDirectory(File directory) throws ResizeException {
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log.log(Level.FINE, "Resizing directory: {0}", directory);
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counters.increment(Counters.COUNTER_TYPE.DIRECTORIES);
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for (SizeSpecification size : options.getSizes()) {
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File relative = relativize(options.getInput(), directory);
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File sizeRoot = new File(options.getOutput(), size.getDirectory());
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File dir = new File(sizeRoot, relative.getPath());
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dir.mkdirs();
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}
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for (File entry : directory.listFiles()) {
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if (entry.isDirectory()) {
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resizeDirectory(entry);
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} else {
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resizeFile(entry);
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}
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}
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}
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private static File relativize(File root, File child) {
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return root.toPath().relativize(child.toPath()).toFile();
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}
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}
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