Frames | No Frames |
1: /* EncodeRGB32.java -- 2: Copyright (C) 2006 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.javax.imageio.bmp; 40: 41: import java.awt.Dimension; 42: import java.awt.image.BufferedImage; 43: import java.awt.image.PixelGrabber; 44: import java.io.IOException; 45: 46: import javax.imageio.IIOImage; 47: import javax.imageio.ImageWriteParam; 48: import javax.imageio.metadata.IIOMetadata; 49: import javax.imageio.stream.ImageOutputStream; 50: 51: public class EncodeRGB32 52: extends BMPEncoder 53: { 54: protected BMPInfoHeader infoHeader; 55: protected BMPFileHeader fileHeader; 56: protected long offset; 57: 58: /** 59: * Constructs an instance of this class. 60: * 61: * @param fh - the file header to use. 62: * @param ih - the info header to use. 63: */ 64: public EncodeRGB32(BMPFileHeader fh, BMPInfoHeader ih) 65: { 66: super(); 67: fileHeader = fh; 68: infoHeader = ih; 69: offset = BMPFileHeader.SIZE + BMPInfoHeader.SIZE; 70: } 71: 72: /** 73: * The image encoder. 74: * 75: * @param o - the image output stream 76: * @param streamMetadata - metadata associated with this stream, or null 77: * @param image - an IIOImage containing image data. 78: * @param param - image writing parameters, or null 79: * @exception IOException if a write error occurs 80: */ 81: public void encode(ImageOutputStream o, IIOMetadata streamMetadata, 82: IIOImage image, ImageWriteParam param) throws IOException 83: { 84: int size; 85: int value; 86: int j; 87: int rowCount; 88: int rowIndex; 89: int lastRowIndex; 90: int[] bitmap; 91: byte rgb[] = new byte[4]; 92: size = (infoHeader.biWidth * infoHeader.biHeight) - 1; 93: rowCount = 1; 94: rowIndex = size - infoHeader.biWidth; 95: lastRowIndex = rowIndex; 96: try 97: { 98: bitmap = new int[infoHeader.biWidth * infoHeader.biHeight]; 99: PixelGrabber pg = new PixelGrabber((BufferedImage) image.getRenderedImage(), 100: 0, 0, infoHeader.biWidth, 101: infoHeader.biHeight, bitmap, 0, 102: infoHeader.biWidth); 103: pg.grabPixels(); 104: 105: for (j = 0; j < size; j++) 106: { 107: value = bitmap[rowIndex]; 108: 109: rgb[0] = (byte) (value & 0xFF); 110: rgb[1] = (byte) ((value >> 8) & 0xFF); 111: rgb[2] = (byte) ((value >> 16) & 0xFF); 112: rgb[3] = (byte) ((value >> 24) & 0xFF); 113: o.write(rgb); 114: if (rowCount == infoHeader.biWidth) 115: { 116: rowCount = 1; 117: rowIndex = lastRowIndex - infoHeader.biWidth; 118: lastRowIndex = rowIndex; 119: } 120: else 121: rowCount++; 122: rowIndex++; 123: } 124: } 125: catch (Exception wb) 126: { 127: wb.printStackTrace(); 128: } 129: } 130: }