1*b1cdbd2cSJim Jagielski /************************************************************** 2*b1cdbd2cSJim Jagielski * 3*b1cdbd2cSJim Jagielski * Licensed to the Apache Software Foundation (ASF) under one 4*b1cdbd2cSJim Jagielski * or more contributor license agreements. See the NOTICE file 5*b1cdbd2cSJim Jagielski * distributed with this work for additional information 6*b1cdbd2cSJim Jagielski * regarding copyright ownership. The ASF licenses this file 7*b1cdbd2cSJim Jagielski * to you under the Apache License, Version 2.0 (the 8*b1cdbd2cSJim Jagielski * "License"); you may not use this file except in compliance 9*b1cdbd2cSJim Jagielski * with the License. You may obtain a copy of the License at 10*b1cdbd2cSJim Jagielski * 11*b1cdbd2cSJim Jagielski * http://www.apache.org/licenses/LICENSE-2.0 12*b1cdbd2cSJim Jagielski * 13*b1cdbd2cSJim Jagielski * Unless required by applicable law or agreed to in writing, 14*b1cdbd2cSJim Jagielski * software distributed under the License is distributed on an 15*b1cdbd2cSJim Jagielski * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 16*b1cdbd2cSJim Jagielski * KIND, either express or implied. See the License for the 17*b1cdbd2cSJim Jagielski * specific language governing permissions and limitations 18*b1cdbd2cSJim Jagielski * under the License. 19*b1cdbd2cSJim Jagielski * 20*b1cdbd2cSJim Jagielski *************************************************************/ 21*b1cdbd2cSJim Jagielski 22*b1cdbd2cSJim Jagielski 23*b1cdbd2cSJim Jagielski 24*b1cdbd2cSJim Jagielski package convwatch; 25*b1cdbd2cSJim Jagielski 26*b1cdbd2cSJim Jagielski import java.awt.Image; 27*b1cdbd2cSJim Jagielski import java.awt.image.PixelGrabber; 28*b1cdbd2cSJim Jagielski import java.awt.image.ImageObserver; 29*b1cdbd2cSJim Jagielski import java.io.File; 30*b1cdbd2cSJim Jagielski //import javax.imageio.ImageIO; 31*b1cdbd2cSJim Jagielski import java.lang.reflect.Method; 32*b1cdbd2cSJim Jagielski 33*b1cdbd2cSJim Jagielski class ImageHelper 34*b1cdbd2cSJim Jagielski { 35*b1cdbd2cSJim Jagielski Image m_aImage; 36*b1cdbd2cSJim Jagielski int[] m_aPixels; 37*b1cdbd2cSJim Jagielski int m_w = 0; 38*b1cdbd2cSJim Jagielski int m_h = 0; 39*b1cdbd2cSJim Jagielski boolean m_bGrabbed = false; 40*b1cdbd2cSJim Jagielski ImageHelper(Image _aImage)41*b1cdbd2cSJim Jagielski public ImageHelper(Image _aImage) 42*b1cdbd2cSJim Jagielski { 43*b1cdbd2cSJim Jagielski m_aImage = _aImage; 44*b1cdbd2cSJim Jagielski 45*b1cdbd2cSJim Jagielski // grab all (consume much memory) 46*b1cdbd2cSJim Jagielski m_w = getWidth(); 47*b1cdbd2cSJim Jagielski m_h = getHeight(); 48*b1cdbd2cSJim Jagielski int x = 0; 49*b1cdbd2cSJim Jagielski int y = 0; 50*b1cdbd2cSJim Jagielski m_aPixels = new int[m_w * m_h]; 51*b1cdbd2cSJim Jagielski PixelGrabber pg = new PixelGrabber(m_aImage, x, y, m_w, m_h, m_aPixels, 0, m_w); 52*b1cdbd2cSJim Jagielski try { 53*b1cdbd2cSJim Jagielski pg.grabPixels(); 54*b1cdbd2cSJim Jagielski } catch (InterruptedException e) { 55*b1cdbd2cSJim Jagielski System.err.println("interrupted waiting for pixels!"); 56*b1cdbd2cSJim Jagielski return; 57*b1cdbd2cSJim Jagielski } 58*b1cdbd2cSJim Jagielski if ((pg.getStatus() & ImageObserver.ABORT) != 0) { 59*b1cdbd2cSJim Jagielski System.err.println("image fetch aborted or errored"); 60*b1cdbd2cSJim Jagielski return; 61*b1cdbd2cSJim Jagielski } 62*b1cdbd2cSJim Jagielski m_bGrabbed = true; 63*b1cdbd2cSJim Jagielski } getWidth()64*b1cdbd2cSJim Jagielski public int getWidth() {return m_aImage.getWidth(null);} getHeight()65*b1cdbd2cSJim Jagielski public int getHeight() {return m_aImage.getHeight(null);} 66*b1cdbd2cSJim Jagielski // direct access to a pixel getPixel(int x, int y)67*b1cdbd2cSJim Jagielski public int getPixel(int x, int y) 68*b1cdbd2cSJim Jagielski { 69*b1cdbd2cSJim Jagielski return m_aPixels[y * m_w + x]; 70*b1cdbd2cSJim Jagielski } 71*b1cdbd2cSJim Jagielski 72*b1cdbd2cSJim Jagielski // Write down the current image to a file. 73*b1cdbd2cSJim Jagielski // public void storeImage(String _sFilename) 74*b1cdbd2cSJim Jagielski // { 75*b1cdbd2cSJim Jagielski // } 76*b1cdbd2cSJim Jagielski createImageHelper(String _sFilename)77*b1cdbd2cSJim Jagielski public static ImageHelper createImageHelper(String _sFilename) 78*b1cdbd2cSJim Jagielski throws java.io.IOException 79*b1cdbd2cSJim Jagielski { 80*b1cdbd2cSJim Jagielski Image aImage = null; 81*b1cdbd2cSJim Jagielski File aFile = new File(_sFilename); 82*b1cdbd2cSJim Jagielski Exception ex = null; 83*b1cdbd2cSJim Jagielski try { 84*b1cdbd2cSJim Jagielski Class imageIOClass = Class.forName("javax.imageio.ImageIO"); 85*b1cdbd2cSJim Jagielski Method readMethod = imageIOClass.getDeclaredMethod("read", new Class[]{java.io.File.class}); 86*b1cdbd2cSJim Jagielski Object retValue = readMethod.invoke(imageIOClass, new Object[]{aFile}); 87*b1cdbd2cSJim Jagielski aImage = (Image)retValue; 88*b1cdbd2cSJim Jagielski } 89*b1cdbd2cSJim Jagielski catch(java.lang.ClassNotFoundException e) { 90*b1cdbd2cSJim Jagielski ex = e; 91*b1cdbd2cSJim Jagielski } 92*b1cdbd2cSJim Jagielski catch(java.lang.NoSuchMethodException e) { 93*b1cdbd2cSJim Jagielski ex = e; 94*b1cdbd2cSJim Jagielski } 95*b1cdbd2cSJim Jagielski catch(java.lang.IllegalAccessException e) { 96*b1cdbd2cSJim Jagielski ex = e; 97*b1cdbd2cSJim Jagielski } 98*b1cdbd2cSJim Jagielski catch(java.lang.reflect.InvocationTargetException e) { 99*b1cdbd2cSJim Jagielski ex = e; 100*b1cdbd2cSJim Jagielski } 101*b1cdbd2cSJim Jagielski 102*b1cdbd2cSJim Jagielski if (ex != null) { 103*b1cdbd2cSJim Jagielski // get Java version: 104*b1cdbd2cSJim Jagielski String javaVersion = System.getProperty("java.version"); 105*b1cdbd2cSJim Jagielski throw new java.io.IOException( 106*b1cdbd2cSJim Jagielski "Cannot construct object with current Java version " + 107*b1cdbd2cSJim Jagielski javaVersion + ": " + ex.getMessage()); 108*b1cdbd2cSJim Jagielski } 109*b1cdbd2cSJim Jagielski // aImage = ImageIO.read(aFile); 110*b1cdbd2cSJim Jagielski return new ImageHelper(aImage); 111*b1cdbd2cSJim Jagielski } 112*b1cdbd2cSJim Jagielski } 113