forked from amazingfate/loongoffice
104 lines
3.4 KiB
Java
104 lines
3.4 KiB
Java
/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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package graphical;
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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 java.lang.reflect.Method;
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class ImageHelper
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{
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private Image m_aImage;
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private int[] m_aPixels;
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private int m_w = 0;
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private int m_h = 0;
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private 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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{
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pg.grabPixels();
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}
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catch (InterruptedException e)
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{
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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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{
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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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}
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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(final int x, final 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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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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return new ImageHelper(aImage);
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}
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}
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