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1: /* AreaAveragingScaleFilter.java -- Java class for filtering images 2: Copyright (C) 1999 Free Software Foundation, Inc. 3: 4: This file is part of GNU Classpath. 5: 6: GNU Classpath is free software; you can redistribute it and/or modify 7: it under the terms of the GNU General Public License as published by 8: the Free Software Foundation; either version 2, or (at your option) 9: any later version. 10: 11: GNU Classpath is distributed in the hope that it will be useful, but 12: WITHOUT ANY WARRANTY; without even the implied warranty of 13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14: General Public License for more details. 15: 16: You should have received a copy of the GNU General Public License 17: along with GNU Classpath; see the file COPYING. If not, write to the 18: Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 19: 02110-1301 USA. 20: 21: Linking this library statically or dynamically with other modules is 22: making a combined work based on this library. Thus, the terms and 23: conditions of the GNU General Public License cover the whole 24: combination. 25: 26: As a special exception, the copyright holders of this library give you 27: permission to link this library with independent modules to produce an 28: executable, regardless of the license terms of these independent 29: modules, and to copy and distribute the resulting executable under 30: terms of your choice, provided that you also meet, for each linked 31: independent module, the terms and conditions of the license of that 32: module. An independent module is a module which is not derived from 33: or based on this library. If you modify this library, you may extend 34: this exception to your version of the library, but you are not 35: obligated to do so. If you do not wish to do so, delete this 36: exception statement from your version. */ 37: 38: 39: package java.awt.image; 40: 41: /** 42: * This filter should produce images which do not have image artifacts 43: * like broken lines which were originally unbroken. The cost is of 44: * course speed. Using bi-linear interpolation here against 4 pixel 45: * points should give the desired results although Sun does not 46: * specify what the exact algorithm should be. 47: * <br> 48: * FIXME: Currently this filter does nothing and needs to be implemented. 49: * 50: * @author C. Brian Jones (cbj@gnu.org) 51: */ 52: public class AreaAveragingScaleFilter extends ReplicateScaleFilter 53: { 54: /** 55: * Construct an instance of <code>AreaAveragingScaleFilter</code> which 56: * should be used in conjunction with a <code>FilteredImageSource</code> 57: * object. 58: * 59: * @param width the width of the destination image 60: * @param height the height of the destination image 61: */ 62: public AreaAveragingScaleFilter(int width, int height) { 63: super(width, height); 64: } 65: 66: /** 67: * The <code>ImageProducer</code> should call this method with a 68: * bit mask of hints from any of <code>RANDOMPIXELORDER</code>, 69: * <code>TOPDOWNLEFTRIGHT</code>, <code>COMPLETESCANLINES</code>, 70: * <code>SINGLEPASS</code>, <code>SINGLEFRAME</code> from the 71: * <code>ImageConsumer</code> interface. 72: * <br> 73: * FIXME - more than likely Sun's implementation desires 74: * <code>TOPDOWNLEFTRIGHT</code> order and this method is overloaded here 75: * in order to assure that mask is part of the hints added to 76: * the consumer. 77: * 78: * @param flags a bit mask of hints 79: * @see ImageConsumer 80: */ 81: public void setHints(int flags) 82: { 83: if (consumer != null) 84: consumer.setHints(flags); 85: } 86: 87: /** 88: * This function delivers a rectangle of pixels where any 89: * pixel(m,n) is stored in the array as a <code>byte</code> at 90: * index (n * scansize + m + offset). 91: * 92: * @param x the x coordinate of the rectangle 93: * @param y the y coordinate of the rectangle 94: * @param w the width of the rectangle 95: * @param h the height of the rectangle 96: * @param model the <code>ColorModel</code> used to translate the pixels 97: * @param pixels the array of pixel values 98: * @param offset the index of the first pixels in the <code>pixels</code> array 99: * @param scansize the width to use in extracting pixels from the <code>pixels</code> array 100: */ 101: public void setPixels(int x, int y, int w, int h, 102: ColorModel model, byte[] pixels, int offset, int scansize) 103: { 104: if (consumer != null) 105: consumer.setPixels(x, y, w, h, model, pixels, offset, scansize); 106: } 107: 108: /** 109: * This function delivers a rectangle of pixels where any 110: * pixel(m,n) is stored in the array as an <code>int</code> at 111: * index (n * scansize + m + offset). 112: * 113: * @param x the x coordinate of the rectangle 114: * @param y the y coordinate of the rectangle 115: * @param w the width of the rectangle 116: * @param h the height of the rectangle 117: * @param model the <code>ColorModel</code> used to translate the pixels 118: * @param pixels the array of pixel values 119: * @param offset the index of the first pixels in the <code>pixels</code> array 120: * @param scansize the width to use in extracting pixels from the <code>pixels</code> array 121: */ 122: public void setPixels(int x, int y, int w, int h, 123: ColorModel model, int[] pixels, int offset, int scansize) 124: { 125: if (consumer != null) 126: consumer.setPixels(x, y, w, h, model, pixels, offset, scansize); 127: } 128: 129: }
GNU Classpath (0.20) |