| /* |
| * Copyright (c) 1995, 2003, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * 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). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /*- |
| * 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 |
| */ |
| 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. |
| */ |
| private static void error(String s1) throws ImageFormatException { |
| throw new ImageFormatException(s1); |
| } |
| |
| /** |
| * 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); |
| } |
| } |