1 /* EncodeRGB16.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.image.BufferedImage; 42 import java.awt.image.PixelGrabber; 43 import java.io.IOException; 44 45 import javax.imageio.IIOImage; 46 import javax.imageio.ImageWriteParam; 47 import javax.imageio.metadata.IIOMetadata; 48 import javax.imageio.stream.ImageOutputStream; 49 50 public class EncodeRGB16 51 extends BMPEncoder 52 { 53 protected BMPInfoHeader infoHeader; 54 protected BMPFileHeader fileHeader; 55 protected long offset; 56 57 /** 58 * Constructs an instance of this class. 59 * 60 * @param fh - the file header to use. 61 * @param ih - the info header to use. 62 */ EncodeRGB16(BMPFileHeader fh, BMPInfoHeader ih)63 public EncodeRGB16(BMPFileHeader fh, BMPInfoHeader ih) 64 { 65 super(); 66 fileHeader = fh; 67 infoHeader = ih; 68 offset = BMPFileHeader.SIZE + BMPInfoHeader.SIZE; 69 } 70 71 /** 72 * The image encoder. 73 * 74 * @param o - the image output stream 75 * @param streamMetadata - metadata associated with this stream, or 76 * 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 */ encode(ImageOutputStream o, IIOMetadata streamMetadata, IIOImage image, ImageWriteParam param)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[2]; 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); 111 112 o.write(rgb); 113 if (rowCount == infoHeader.biWidth) 114 { 115 rowCount = 1; 116 rowIndex = lastRowIndex - infoHeader.biWidth; 117 lastRowIndex = rowIndex; 118 } 119 else 120 rowCount++; 121 rowIndex++; 122 } 123 } 124 catch (Exception wb) 125 { 126 wb.printStackTrace(); 127 } 128 } 129 } 130