302 lines
8.4 KiB
Java
302 lines
8.4 KiB
Java
/*
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* Copyright (c) 2002-2008 LWJGL Project
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* * Neither the name of 'LWJGL' nor the names of
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* its contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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package org.lwjgl.util;
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import java.io.BufferedOutputStream;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.InputStreamReader;
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import java.io.LineNumberReader;
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import java.util.HashMap;
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import java.util.StringTokenizer;
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/**
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* <p>
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* NOTE: This simple XPM reader does not support extensions nor hotspots
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* </p>
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*
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* @author Brian Matzon <brian@matzon.dk>
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* @author Jos Hirth
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* @version $Revision$
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* $Id$
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*/
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public class XPMFile {
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/** Array of bytes (RGBA) */
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private byte bytes[];
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private static final int WIDTH = 0;
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private static final int HEIGHT = 1;
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private static final int NUMBER_OF_COLORS = 2;
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private static final int CHARACTERS_PER_PIXEL = 3;
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private static int[] format = new int[4];
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/*
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* Private constructor, use load(String filename)
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*/
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private XPMFile() {
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}
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/**
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* Loads the XPM file
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*
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* @param file
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* path to file
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* @return XPMFile loaded, or exception
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* @throws IOException
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* If any IO exceptions occurs while reading file
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*/
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public static XPMFile load(String file) throws IOException {
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return load(new FileInputStream(new File(file)));
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}
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/**
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* Loads the XPM file
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*
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* @param is
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* InputStream to read file from
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* @return XPMFile loaded, or exception
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*/
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public static XPMFile load(InputStream is) {
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XPMFile xFile = new XPMFile();
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xFile.readImage(is);
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return xFile;
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}
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/**
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* @return the height of the image.
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*/
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public int getHeight() {
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return format[HEIGHT];
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}
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/**
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* @return the width of the image.
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*/
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public int getWidth() {
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return format[WIDTH];
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}
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/**
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* @return The data of the image.
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*/
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public byte[] getBytes() {
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return bytes;
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}
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/**
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* Read the image from the specified file.
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*/
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private void readImage(InputStream is) {
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try {
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LineNumberReader reader = new LineNumberReader(
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new InputStreamReader(is));
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HashMap<String, Integer> colors = new HashMap<String, Integer>();
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format = parseFormat(nextLineOfInterest(reader));
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// setup color mapping
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for (int i = 0; i < format[NUMBER_OF_COLORS]; i++) {
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Object[] colorDefinition = parseColor(nextLineOfInterest(reader));
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colors.put((String)colorDefinition[0], (Integer)colorDefinition[1]);
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}
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// read actual image (convert to RGBA)
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bytes = new byte[format[WIDTH] * format[HEIGHT] * 4];
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for (int i = 0; i < format[HEIGHT]; i++) {
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parseImageLine(nextLineOfInterest(reader), format, colors, i);
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}
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} catch (Exception e) {
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e.printStackTrace();
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throw new IllegalArgumentException("Unable to parse XPM File");
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}
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}
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/**
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* Finds the next interesting line of text.
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*
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* @param reader
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* The LineNumberReader to read from
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* @return The next interesting String (with stripped quotes)
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* @throws IOException
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* If any IO exceptions occurs while reading file
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*/
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private static String nextLineOfInterest(LineNumberReader reader)
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throws IOException {
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String ret;
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do {
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ret = reader.readLine();
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} while (!ret.startsWith("\""));
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// lacks sanity check
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return ret.substring(1, ret.lastIndexOf('\"'));
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}
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/**
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* Parses the format of the xpm file given a format string
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*
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* @param format
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* String to parse
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* @return Array specifying width, height, colors, characters per pixel
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*/
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private static int[] parseFormat(String format) {
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// format should look like this:
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// 16 16 122 2
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// tokenize it
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StringTokenizer st = new StringTokenizer(format);
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return new int[] { Integer.parseInt(st.nextToken()), /* width */
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Integer.parseInt(st.nextToken()), /* height */
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Integer.parseInt(st.nextToken()), /* colors */
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Integer.parseInt(st.nextToken()) /* chars per pixel */
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};
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}
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/**
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* Given a line defining a color/pixel, parses this into an array containing
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* a key and a color
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*
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* @param line
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* Line to parse
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* @return Array containing a key (String) and a color (Integer)
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*/
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private static Object[] parseColor(String line) {
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// line should look like this:
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// # c #0A0A0A
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// NOTE: will break if the color is something like "black" or "gray50"
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// etc (instead of #rrggbb).
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String key = line.substring(0, format[CHARACTERS_PER_PIXEL]);
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// since we always assume color as type we dont need to read it
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// String type = line.substring(format[CHARACTERS_PER_PIXEL] + 1,
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// format[CHARACTERS_PER_PIXEL] + 2);
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String color = line.substring(format[CHARACTERS_PER_PIXEL] + 4);
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// we always assume type is color, and supplied as #<r><g><b>
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return new Object[] { key, Integer.parseInt(color, 16) };
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}
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/**
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* Parses an Image line into its byte values
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*
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* @param line
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* Line of chars to parse
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* @param format
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* Format to expext it in
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* @param colors
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* Colors to lookup
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* @param index
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* current index into lines, we've reached
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*/
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private void parseImageLine(String line, int[] format, HashMap<String, Integer> colors,
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int index) {
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// offset for next line
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int offset = index * 4 * format[WIDTH];
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// read <format[CHARACTERS_PER_PIXEL]> characters <format[WIDTH]> times,
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// each iteration equals one pixel
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for (int i = 0; i < format[WIDTH]; i++) {
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String key = line
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.substring(
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i * format[CHARACTERS_PER_PIXEL],
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(i * format[CHARACTERS_PER_PIXEL] + format[CHARACTERS_PER_PIXEL]));
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int color = colors.get(key);
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bytes[offset + (i * 4)] = (byte) ((color & 0x00ff0000) >> 16);
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bytes[offset + ((i * 4) + 1)] = (byte) ((color & 0x0000ff00) >> 8);
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bytes[offset + ((i * 4) + 2)] = (byte) ((color & 0x000000ff) >> 0); // looks
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// better
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// :)
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bytes[offset + ((i * 4) + 3)] = (byte) 0xff; // always 0xff alpha
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}
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}
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/**
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* @param args
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*/
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public static void main(String[] args) {
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if (args.length != 1) {
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System.out.println("usage:\nXPMFile <file>");
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}
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try {
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String out = args[0].substring(0, args[0].indexOf(".")) + ".raw";
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XPMFile file = XPMFile.load(args[0]);
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BufferedOutputStream bos = new BufferedOutputStream(
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new FileOutputStream(new File(out)));
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bos.write(file.getBytes());
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bos.close();
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// showResult(file.getBytes());
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} catch (Exception e) {
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e.printStackTrace();
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}
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}
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/*
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private static void showResult(byte[] bytes) {
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final BufferedImage i = new BufferedImage(16, 16, BufferedImage.TYPE_INT_ARGB);
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int c = 0;
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for (int y = 0; y < 16; y++) {
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for (int x = 0; x < 16; x++) {
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i.setRGB(x, y, (bytes[c] << 16) + (bytes[c + 1] << 8) + (bytes[c + 2] << 0) + (bytes[c + 3] << 24));//+(128<<24));//
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c += 4;
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}
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}
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final Frame frame = new Frame("XPM Result");
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frame.add(new Canvas() {
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public void paint(Graphics g) {
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g.drawImage(i, 0, 0, frame);
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}
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});
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frame.addWindowListener(new WindowAdapter() {
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public void windowClosing(WindowEvent e) {
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frame.dispose();
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}
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});
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frame.setSize(100, 100);
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frame.setVisible(true);
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}*/
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} |