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1: /* GtkImageConsumer.java 2: Copyright (C) 2005 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 gnu.java.awt.peer.gtk; 40: 41: import java.awt.Graphics; 42: import java.awt.Image; 43: import java.awt.image.ColorModel; 44: import java.awt.image.DirectColorModel; 45: import java.awt.image.ImageConsumer; 46: import java.awt.image.ImageObserver; 47: import java.awt.image.ImageProducer; 48: import java.awt.image.MemoryImageSource; 49: import java.util.Hashtable; 50: import java.util.Vector; 51: 52: /** 53: * Helper class to GtkImage. Sits and gathers pixels for a GtkImage and then 54: * calls GtkImage.setImage(). 55: * 56: * @author Sven de Marothy 57: */ 58: public class GtkImageConsumer implements ImageConsumer 59: { 60: private GtkImage target; 61: private int width, height; 62: private Hashtable properties; 63: private int[] pixelCache = null; 64: private ImageProducer source; 65: 66: public GtkImageConsumer(GtkImage target, ImageProducer source) 67: { 68: this.target = target; 69: this.source = source; 70: } 71: 72: public synchronized void imageComplete (int status) 73: { 74: // we need to reuse the pixel cache for memory image sources since 75: // a memory image's backing array can be updated "live". 76: if (!(source instanceof MemoryImageSource)) 77: source.removeConsumer(this); 78: target.setImage(width, height, pixelCache, properties); 79: } 80: 81: public synchronized void setColorModel (ColorModel model) 82: { 83: // This method is to inform on what the most used color model 84: // in the image is, for optimization reasons. We ignore this 85: // information. 86: } 87: 88: public synchronized void setDimensions (int width, int height) 89: { 90: pixelCache = new int[width*height]; 91: 92: this.width = width; 93: this.height = height; 94: } 95: 96: public synchronized void setHints (int flags) 97: { 98: // This method informs us in which order the pixels are 99: // delivered, for progressive-loading support, etc. 100: // Since we wait until it's all loaded, we can ignore the hints. 101: } 102: 103: public synchronized void setPixels (int x, int y, int width, int height, 104: ColorModel cm, byte[] pixels, 105: int offset, int scansize) 106: { 107: setPixels (x, y, width, height, cm, convertPixels (pixels), offset, 108: scansize); 109: } 110: 111: public synchronized void setPixels (int x, int y, int width, int height, 112: ColorModel cm, int[] pixels, 113: int offset, int scansize) 114: { 115: if (pixelCache == null) 116: return; // Not sure this should ever happen. 117: 118: if (cm.equals(GtkImage.nativeModel)) 119: for (int i = 0; i < height; i++) 120: System.arraycopy (pixels, offset + (i * scansize), 121: pixelCache, (y + i) * this.width + x, 122: width); 123: else 124: { 125: for (int i = 0; i < height; i++) 126: for (int j = 0; j < width; j++) 127: { 128: // get in AARRGGBB and convert to AABBGGRR 129: int pix = cm.getRGB(pixels[offset + (i * scansize) + x + j]); 130: byte b = (byte)(pix & 0xFF); 131: byte r = (byte)(((pix & 0x00FF0000) >> 16) & 0xFF); 132: pix &= 0xFF00FF00; 133: pix |= ((b & 0xFF) << 16); 134: pix |= (r & 0xFF); 135: pixelCache[(y + i) * this.width + x + j] = pix; 136: } 137: } 138: } 139: 140: /** 141: * This is an old method, no idea if it's correct. 142: */ 143: private int[] convertPixels (byte[] pixels) 144: { 145: int ret[] = new int[pixels.length]; 146: 147: for (int i = 0; i < pixels.length; i++) 148: ret[i] = pixels[i] & 0xFF; 149: 150: return ret; 151: } 152: 153: public synchronized void setProperties (Hashtable props) 154: { 155: this.properties = props; 156: } 157: } 158: