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.io.FileOutputStream; 031 import java.io.OutputStream; 032 import java.util.Iterator; 033 import java.util.logging.Level; 034 import java.util.logging.Logger; 035 036 import javax.imageio.ImageIO; 037 import javax.imageio.ImageWriter; 038 import javax.imageio.stream.ImageOutputStream; 039 040 public abstract class ExportPNG { 041 042 private static final Logger logger = Logger.getLogger(ExportPNG.class.getName()); 043 044 public static final void save(String file, Component c) { 045 save(file, c, c.getWidth()); 046 } 047 048 public static final void save(File file, Component c) { 049 save(file, c, c.getWidth()); 050 } 051 052 public static final void save(String file, Component c, int width) { 053 save(new File(file), c, width); 054 } 055 056 public static final void save(File file, Component c, int width) { 057 if (file == null) { 058 logger.log(Level.WARNING, "no file selected"); 059 return; 060 } 061 if (c == null) { 062 logger.log(Level.WARNING, "no component provided"); 063 return; 064 } 065 double factor = width / c.getWidth(); 066 BufferedImage image = new BufferedImage((int) (c.getWidth() * factor), (int) (c.getHeight() * factor), 067 BufferedImage.TYPE_INT_RGB); 068 Graphics2D g2 = image.createGraphics(); 069 g2.scale(factor, factor); 070 c.paint(g2); 071 try { 072 OutputStream out = new FileOutputStream(file); 073 Iterator<?> writers = ImageIO.getImageWritersByFormatName("png"); 074 ImageWriter writer = (ImageWriter) writers.next(); 075 ImageOutputStream ios = ImageIO.createImageOutputStream(file); 076 writer.setOutput(ios); 077 writer.write(image); 078 out.close(); 079 } catch (Exception e) { 080 logger.log(Level.WARNING, "could not save image", e); 081 } 082 } 083 084 }