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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
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/*-
 *      Reads xbitmap format images into a DIBitmap structure.
 */
package sun.awt.image;

import java.io.*;
import java.awt.image.*;

Parse files of the form: #define foo_width w #define foo_height h static char foo_bits[] = { 0xnn,0xnn,0xnn,0xnn,0xnn,0xnn,0xnn,0xnn,0xnn,0xnn,0xnn,0xnn,0xnn,0xnn,0xnn, 0xnn,0xnn,0xnn,0xnn,0xnn,0xnn,0xnn,0xnn,0xnn,0xnn,0xnn,0xnn,0xnn,0xnn,0xnn, 0xnn,0xnn,0xnn,0xnn};
Author:James Gosling
/** * Parse files of the form: * * #define foo_width w * #define foo_height h * static char foo_bits[] = { * 0xnn,0xnn,0xnn,0xnn,0xnn,0xnn,0xnn,0xnn,0xnn,0xnn,0xnn,0xnn,0xnn,0xnn,0xnn, * 0xnn,0xnn,0xnn,0xnn,0xnn,0xnn,0xnn,0xnn,0xnn,0xnn,0xnn,0xnn,0xnn,0xnn,0xnn, * 0xnn,0xnn,0xnn,0xnn}; * * @author James Gosling */
public class XbmImageDecoder extends ImageDecoder { private static byte[] XbmColormap = {(byte) 255, (byte) 255, (byte) 255, 0, 0, 0}; private static int XbmHints = (ImageConsumer.TOPDOWNLEFTRIGHT | ImageConsumer.COMPLETESCANLINES | ImageConsumer.SINGLEPASS | ImageConsumer.SINGLEFRAME); public XbmImageDecoder(InputStreamImageSource src, InputStream is) { super(src, is); if (!(input instanceof BufferedInputStream)) { // If the topmost stream is a metered stream, // we take forever to decode the image... input = new BufferedInputStream(input, 80); } }
An error has occurred. Throw an exception.
/** * An error has occurred. Throw an exception. */
private static void error(String s1) throws ImageFormatException { throw new ImageFormatException(s1); }
produce an image from the stream.
/** * produce an image from the stream. */
public void produceImage() throws IOException, ImageFormatException { char[] nm = new char[80]; int c; int i = 0; int state = 0; int H = 0; int W = 0; int x = 0; int y = 0; boolean start = true; byte[] raster = null; IndexColorModel model = null; while (!aborted && (c = input.read()) != -1) { if ('a' <= c && c <= 'z' || 'A' <= c && c <= 'Z' || '0' <= c && c <= '9' || c == '#' || c == '_') { if (i < 78) nm[i++] = (char) c; } else if (i > 0) { int nc = i; i = 0; if (start) { if (nc != 7 || nm[0] != '#' || nm[1] != 'd' || nm[2] != 'e' || nm[3] != 'f' || nm[4] != 'i' || nm[5] != 'n' || nm[6] != 'e') { error("Not an XBM file"); } start = false; } if (nm[nc - 1] == 'h') state = 1; /* expecting width */ else if (nm[nc - 1] == 't' && nc > 1 && nm[nc - 2] == 'h') state = 2; /* expecting height */ else if (nc > 2 && state < 0 && nm[0] == '0' && nm[1] == 'x') { int n = 0; for (int p = 2; p < nc; p++) { c = nm[p]; if ('0' <= c && c <= '9') c = c - '0'; else if ('A' <= c && c <= 'Z') c = c - 'A' + 10; else if ('a' <= c && c <= 'z') c = c - 'a' + 10; else c = 0; n = n * 16 + c; } for (int mask = 1; mask <= 0x80; mask <<= 1) { if (x < W) { if ((n & mask) != 0) raster[x] = 1; else raster[x] = 0; } x++; } if (x >= W) { if (setPixels(0, y, W, 1, model, raster, 0, W) <= 0) { return; } x = 0; if (y++ >= H) { break; } } } else { int n = 0; for (int p = 0; p < nc; p++) if ('0' <= (c = nm[p]) && c <= '9') n = n * 10 + c - '0'; else { n = -1; break; } if (n > 0 && state > 0) { if (state == 1) W = n; else H = n; if (W == 0 || H == 0) state = 0; else { model = new IndexColorModel(8, 2, XbmColormap, 0, false, 0); setDimensions(W, H); setColorModel(model); setHints(XbmHints); headerComplete(); raster = new byte[W]; state = -1; } } } } } input.close(); imageComplete(ImageConsumer.STATICIMAGEDONE, true); } }