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121 lines
4.8 KiB
121 lines
4.8 KiB
// ymageICOParser.java
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// (C) 2007 by Michael Peter Christen; mc@yacy.net, Frankfurt a. M., Germany
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// first published 15.07.2007 on http://yacy.net
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//
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// $LastChangedDate: 2006-04-02 22:40:07 +0200 (So, 02 Apr 2006) $
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// $LastChangedRevision: 1986 $
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// $LastChangedBy: orbiter $
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//
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// LICENSE
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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 2 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, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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package de.anomic.ymage;
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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.IOException;
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import javax.imageio.ImageIO;
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public class ymageICOParser {
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// this is a implementation of http://msdn2.microsoft.com/en-us/library/ms997538(d=printer).aspx
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public static final int ICONDIRENTRY_size = 16;
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private final int idCount;
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ymageBMPParser.INFOHEADER[] infoheaders;
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ymageBMPParser.IMAGEMAP[] imagemaps;
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public static final boolean isICO(final byte[] source) {
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// check the file magic
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return (source != null) && (source.length >= 4) && (source[0] == 0) && (source[1] == 0) && (source[2] == 1) && (source[3] == 0);
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}
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public ymageICOParser(final byte[] source) {
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// read info-header
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idCount = ymageBMPParser.WORD(source, 4);
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// read the icon directory entry and the image entries
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final ICONDIRENTRY[] icondirentries = new ICONDIRENTRY[idCount];
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infoheaders = new ymageBMPParser.INFOHEADER[idCount];
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final ymageBMPParser.COLORTABLE[] colortables = new ymageBMPParser.COLORTABLE[idCount];
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imagemaps = new ymageBMPParser.IMAGEMAP[idCount];
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for (int i = 0; i < idCount; i++) {
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icondirentries[i] = new ICONDIRENTRY(source, 6 + i * ICONDIRENTRY_size);
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infoheaders[i] = new ymageBMPParser.INFOHEADER(source, icondirentries[i].dwImageOffset);
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colortables[i] = new ymageBMPParser.COLORTABLE(source, icondirentries[i].dwImageOffset + ymageBMPParser.INFOHEADER_size, infoheaders[i]);
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imagemaps[i] = new ymageBMPParser.IMAGEMAP(source, icondirentries[i].dwImageOffset + ymageBMPParser.INFOHEADER_size + colortables[i].colorbytes, icondirentries[i].bWidth, icondirentries[i].bHeight, infoheaders[i].biCompression, infoheaders[i].biBitCount, colortables[i]);
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}
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}
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public static class ICONDIRENTRY {
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public int bWidth, bHeight, bColorCount, bReserved, wPlanes, wBitCount, dwBytesInRes, dwImageOffset;
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public ICONDIRENTRY(final byte[] s, final int offset) {
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// read info-header
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bWidth = ymageBMPParser.BYTE(s, offset + 0);
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bHeight = ymageBMPParser.BYTE(s, offset + 1);
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bColorCount = ymageBMPParser.BYTE(s, offset + 2);
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bReserved = ymageBMPParser.BYTE(s, offset + 3);
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wPlanes = ymageBMPParser.WORD(s, offset + 4);
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wBitCount = ymageBMPParser.WORD(s, offset + 6);
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dwBytesInRes = ymageBMPParser.DWORD(s, offset + 8);
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dwImageOffset = ymageBMPParser.DWORD(s, offset + 12);
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}
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}
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public int images() {
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// return number of images in icon
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return idCount;
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}
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public BufferedImage getImage(final int index) {
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if (imagemaps == null || index >= imagemaps.length) return null;
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return imagemaps[index].image;
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}
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public static void main(final String[] args) {
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// read a ICO and write it as png
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System.setProperty("java.awt.headless", "true");
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final File in = new File(args[0]);
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final File out = new File(args[1]);
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final byte[] file = new byte[(int) in.length()];
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FileInputStream fis = null;
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try {
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fis = new FileInputStream(in);
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fis.read(file);
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} catch (final FileNotFoundException e) {
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e.printStackTrace();
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} catch (final IOException e) {
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e.printStackTrace();
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}
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final ymageICOParser parser = new ymageICOParser(file);
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try {
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ImageIO.write(parser.getImage(0), "PNG", out);
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} catch (final IOException e) {
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e.printStackTrace();
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}
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}
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} |