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	/*
	* 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);
	}
	}

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