116 lines
3.9 KiB
Java
116 lines
3.9 KiB
Java
/*************************************************************************
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*
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* Copyright 2000, 2010 Oracle and/or its affiliates.
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*
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* OpenOffice.org - a multi-platform office productivity suite
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*
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* This file is part of OpenOffice.org.
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*
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* OpenOffice.org is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License version 3
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* only, as published by the Free Software Foundation.
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*
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* OpenOffice.org 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 Lesser General Public License version 3 for more details
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* (a copy is included in the LICENSE file that accompanied this code).
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*
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* You should have received a copy of the GNU Lesser General Public License
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* version 3 along with OpenOffice.org. If not, see
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* <http://www.openoffice.org/license.html>
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* for a copy of the LGPLv3 License.
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*
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************************************************************************/
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package convwatch;
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import java.awt.Image;
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import java.awt.image.PixelGrabber;
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import java.awt.image.ImageObserver;
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import java.io.File;
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//import javax.imageio.ImageIO;
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import java.lang.reflect.Method;
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class ImageHelper
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{
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Image m_aImage;
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int[] m_aPixels;
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int m_w = 0;
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int m_h = 0;
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boolean m_bGrabbed = false;
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public ImageHelper(Image _aImage)
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{
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m_aImage = _aImage;
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// grab all (consume much memory)
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m_w = getWidth();
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m_h = getHeight();
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int x = 0;
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int y = 0;
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m_aPixels = new int[m_w * m_h];
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PixelGrabber pg = new PixelGrabber(m_aImage, x, y, m_w, m_h, m_aPixels, 0, m_w);
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try {
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pg.grabPixels();
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} catch (InterruptedException e) {
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System.err.println("interrupted waiting for pixels!");
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return;
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}
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if ((pg.getStatus() & ImageObserver.ABORT) != 0) {
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System.err.println("image fetch aborted or errored");
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return;
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}
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m_bGrabbed = true;
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}
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public int getWidth() {return m_aImage.getWidth(null);}
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public int getHeight() {return m_aImage.getHeight(null);}
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// direct access to a pixel
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public int getPixel(int x, int y)
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{
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return m_aPixels[y * m_w + x];
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}
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// Write down the current image to a file.
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// public void storeImage(String _sFilename)
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// {
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// }
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public static ImageHelper createImageHelper(String _sFilename)
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throws java.io.IOException
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{
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Image aImage = null;
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File aFile = new File(_sFilename);
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Exception ex = null;
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try {
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Class imageIOClass = Class.forName("javax.imageio.ImageIO");
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Method readMethod = imageIOClass.getDeclaredMethod("read", new Class[]{java.io.File.class});
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Object retValue = readMethod.invoke(imageIOClass, new Object[]{aFile});
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aImage = (Image)retValue;
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}
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catch(java.lang.ClassNotFoundException e) {
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ex = e;
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}
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catch(java.lang.NoSuchMethodException e) {
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ex = e;
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}
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catch(java.lang.IllegalAccessException e) {
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ex = e;
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}
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catch(java.lang.reflect.InvocationTargetException e) {
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ex = e;
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}
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if (ex != null) {
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// get Java version:
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String javaVersion = System.getProperty("java.version");
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throw new java.io.IOException(
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"Cannot construct object with current Java version " +
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javaVersion + ": " + ex.getMessage());
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}
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// aImage = ImageIO.read(aFile);
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return new ImageHelper(aImage);
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}
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}
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