Java tutorial
/* * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You under the Apache License, Version 2.0 * (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package org.apache.commons.imaging.examples; import java.awt.*; import java.awt.image.BufferedImage; import java.io.File; import java.io.IOException; import java.util.HashMap; import java.util.Map; import org.apache.commons.imaging.ImageReadException; import org.apache.commons.imaging.Imaging; import org.apache.commons.imaging.ImagingConstants; import org.apache.commons.imaging.common.BufferedImageFactory; public class ImageReadExample { public static BufferedImage imageReadExample(final File file) throws ImageReadException, IOException { final Map<String, Object> params = new HashMap<>(); // set optional parameters if you like params.put(ImagingConstants.BUFFERED_IMAGE_FACTORY, new ManagedImageBufferedImageFactory()); // params.put(ImagingConstants.PARAM_KEY_VERBOSE, Boolean.TRUE); // read image final BufferedImage image = Imaging.getBufferedImage(file, params); return image; } public static class ManagedImageBufferedImageFactory implements BufferedImageFactory { @Override public BufferedImage getColorBufferedImage(final int width, final int height, final boolean hasAlpha) { final GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment(); final GraphicsDevice gd = ge.getDefaultScreenDevice(); final GraphicsConfiguration gc = gd.getDefaultConfiguration(); return gc.createCompatibleImage(width, height, Transparency.TRANSLUCENT); } @Override public BufferedImage getGrayscaleBufferedImage(final int width, final int height, final boolean hasAlpha) { return getColorBufferedImage(width, height, hasAlpha); } } }