001 /* 002 * Copyright (C) 2008-2010 by Holger Arndt 003 * 004 * This file is part of the Universal Java Matrix Package (UJMP). 005 * See the NOTICE file distributed with this work for additional 006 * information regarding copyright ownership and licensing. 007 * 008 * UJMP is free software; you can redistribute it and/or modify 009 * it under the terms of the GNU Lesser General Public License as 010 * published by the Free Software Foundation; either version 2 011 * of the License, or (at your option) any later version. 012 * 013 * UJMP is distributed in the hope that it will be useful, 014 * but WITHOUT ANY WARRANTY; without even the implied warranty of 015 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 016 * GNU Lesser General Public License for more details. 017 * 018 * You should have received a copy of the GNU Lesser General Public 019 * License along with UJMP; if not, write to the 020 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, 021 * Boston, MA 02110-1301 USA 022 */ 023 024 package org.ujmp.gui.io; 025 026 import java.awt.Component; 027 import java.awt.Graphics2D; 028 import java.awt.image.BufferedImage; 029 import java.io.File; 030 import java.util.Iterator; 031 import java.util.Locale; 032 import java.util.logging.Level; 033 import java.util.logging.Logger; 034 035 import javax.imageio.IIOImage; 036 import javax.imageio.ImageIO; 037 import javax.imageio.ImageWriteParam; 038 import javax.imageio.ImageWriter; 039 import javax.imageio.plugins.jpeg.JPEGImageWriteParam; 040 import javax.imageio.stream.ImageOutputStream; 041 042 import org.ujmp.core.util.io.FileSelector; 043 044 public abstract class ExportJPEG { 045 046 private static final Logger logger = Logger.getLogger(ExportJPEG.class 047 .getName()); 048 049 public static final File selectFile() { 050 return selectFile(null); 051 } 052 053 public static final File selectFile(Component c) { 054 return FileSelector.selectFile(c, "JPEG Files", ".jpg"); 055 } 056 057 public static final void save(String filename, Component c) { 058 save(new File(filename), c, c.getWidth()); 059 } 060 061 public static final void save(String filename, Component c, int width) { 062 save(new File(filename), c, width); 063 } 064 065 public static final void save(File file, Component c) { 066 save(file, c, c.getWidth()); 067 } 068 069 public static final void save(File file, Component c, int width) { 070 if (file == null) { 071 logger.log(Level.WARNING, "no file selected"); 072 return; 073 } 074 if (c == null) { 075 logger.log(Level.WARNING, "no component provided"); 076 return; 077 } 078 double factor = width / c.getWidth(); 079 BufferedImage myImage = new BufferedImage( 080 (int) (c.getWidth() * factor), (int) (c.getHeight() * factor), 081 BufferedImage.TYPE_INT_RGB); 082 Graphics2D g2 = myImage.createGraphics(); 083 g2.scale(factor, factor); 084 c.paint(g2); 085 try { 086 ImageWriter writer = ImageIO.getImageWritersByFormatName("jpg") 087 .next(); 088 089 ImageOutputStream ios = ImageIO.createImageOutputStream(file); 090 writer.setOutput(ios); 091 092 ImageWriteParam iwparam = new JPEGImageWriteParam(Locale 093 .getDefault()); 094 iwparam.setCompressionMode(ImageWriteParam.MODE_EXPLICIT); 095 iwparam.setCompressionQuality(1.0f); 096 097 writer.write(null, new IIOImage(myImage, null, null), iwparam); 098 099 ios.flush(); 100 writer.dispose(); 101 ios.close(); 102 103 } catch (Exception e) { 104 logger.log(Level.WARNING, "could not save jpg image", e); 105 } 106 } 107 }