001: /*
002: * $RCSfile: RgbFile.java,v $
003: *
004: * Copyright (c) 2006 Sun Microsystems, Inc. All rights reserved.
005: *
006: * Redistribution and use in source and binary forms, with or without
007: * modification, are permitted provided that the following conditions
008: * are met:
009: *
010: * - Redistribution of source code must retain the above copyright
011: * notice, this list of conditions and the following disclaimer.
012: *
013: * - Redistribution in binary form must reproduce the above copyright
014: * notice, this list of conditions and the following disclaimer in
015: * the documentation and/or other materials provided with the
016: * distribution.
017: *
018: * Neither the name of Sun Microsystems, Inc. or the names of
019: * contributors may be used to endorse or promote products derived
020: * from this software without specific prior written permission.
021: *
022: * This software is provided "AS IS," without a warranty of any
023: * kind. ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND
024: * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,
025: * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY
026: * EXCLUDED. SUN MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL
027: * NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF
028: * USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
029: * DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR
030: * ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL,
031: * CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND
032: * REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF OR
033: * INABILITY TO USE THIS SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE
034: * POSSIBILITY OF SUCH DAMAGES.
035: *
036: * You acknowledge that this software is not designed, licensed or
037: * intended for use in the design, construction, operation or
038: * maintenance of any nuclear facility.
039: *
040: * $Revision: 1.1 $
041: * $Date: 2006/04/24 16:45:54 $
042: * $State: Exp $
043: */
044:
045: package org.jdesktop.j3d.loaders.vrml97.impl;
046:
047: import java.io.BufferedInputStream;
048: import java.io.FileNotFoundException;
049: import java.io.FileInputStream;
050: import java.io.InputStream;
051: import java.awt.image.BufferedImage;
052: import java.io.IOException;
053: import java.awt.image.DataBuffer;
054: import java.awt.image.DataBufferByte;
055: import java.awt.image.ComponentColorModel;
056: import java.awt.image.WritableRaster;
057: import java.awt.color.ColorSpace;
058: import java.awt.Transparency;
059:
060: class RgbFile extends BufferedInputStream {
061:
062: // Header data
063: short dimension;
064: short xSize;
065: short ySize;
066: short zSize;
067:
068: String filename;
069:
070: private static final int DEBUG = 0;
071:
072: short getShort() throws IOException {
073: int t1 = (short) read();
074: if (t1 == -1)
075: throw new IOException("Unexpected EOF");
076: int t2 = (short) read();
077: if (t2 == -1)
078: throw new IOException("Unexpected EOF");
079: return (short) ((t1 << 8) | t2);
080: } // End of getShort()
081:
082: byte getByte() throws IOException {
083: int t = read();
084: if (t == -1)
085: throw new IOException("Unexpected EOF");
086: return (byte) t;
087: } // End of getByte
088:
089: int getInt() throws IOException {
090: int ret = 0;
091: for (int i = 0; i < 4; i++) {
092: int t = read();
093: if (t == -1)
094: throw new IOException("Unexpected EOF");
095: ret = (ret << 8) | t;
096: }
097: return ret;
098: } // end of getInt
099:
100: public BufferedImage getImage() throws IOException {
101: short magic = getShort();
102:
103: if (magic != 474)
104: throw new IOException("Unrecognized file format.");
105:
106: byte storage = getByte();
107:
108: if (storage != 0)
109: throw new IOException("RLE Compressed files not supported");
110:
111: byte bpc = getByte();
112: dimension = getShort();
113: xSize = getShort();
114: ySize = getShort();
115: zSize = getShort();
116: int pixMin = getInt();
117: int pixMax = getInt();
118: skip(84l);
119: int colorMap = getInt();
120:
121: if ((DEBUG & 1) != 0) {
122: System.out.println(filename + ":");
123: System.out.println(" bpc = " + bpc);
124: System.out.println(" dimension = " + dimension);
125: System.out.println(" xSize = " + xSize);
126: System.out.println(" ySize = " + ySize);
127: System.out.println(" zSize = " + zSize);
128: System.out.println(" pixMin = " + pixMin);
129: System.out.println(" pixMax = " + pixMax);
130: System.out.println(" colorMap = " + colorMap);
131: }
132:
133: if ((pixMin != 0) || (pixMax != 0xff) || (colorMap != 0)
134: || (bpc != 1))
135: throw new IOException("Unsupported options in file");
136:
137: skip(404l);
138:
139: ComponentColorModel cm = null;
140: if (zSize == 1) {
141: // Black and White image
142: ColorSpace cs = ColorSpace.getInstance(ColorSpace.CS_GRAY);
143:
144: int[] nBits = { 8 };
145: cm = new ComponentColorModel(cs, nBits, false, false,
146: Transparency.OPAQUE, DataBuffer.TYPE_BYTE);
147:
148: } else if (zSize == 2) {
149: // Black and White image with alpha
150: ColorSpace cs = ColorSpace.getInstance(ColorSpace.CS_GRAY);
151:
152: int[] nBits = { 8, 8 };
153: cm = new ComponentColorModel(cs, nBits, true, false,
154: Transparency.TRANSLUCENT, DataBuffer.TYPE_BYTE);
155:
156: } else if (zSize == 3) {
157: // RGB Image
158: ColorSpace cs = ColorSpace.getInstance(ColorSpace.CS_sRGB);
159:
160: int[] nBits = { 8, 8, 8 };
161: cm = new ComponentColorModel(cs, nBits, false, false,
162: Transparency.OPAQUE, DataBuffer.TYPE_BYTE);
163:
164: } else if (zSize == 4) {
165: // RGBA Image
166: ColorSpace cs = ColorSpace.getInstance(ColorSpace.CS_sRGB);
167:
168: int[] nBits = { 8, 8, 8, 8 };
169: cm = new ComponentColorModel(cs, nBits, true, false,
170: Transparency.TRANSLUCENT, DataBuffer.TYPE_BYTE);
171: } else {
172: throw new IOException("Unsupported options in file");
173: }
174:
175: WritableRaster r = cm.createCompatibleWritableRaster(xSize,
176: ySize);
177: BufferedImage bi = new BufferedImage(cm, r, false, null);
178:
179: int t;
180: byte image[] = ((DataBufferByte) r.getDataBuffer()).getData();
181: for (short z = 0; z < zSize; z++) {
182: for (int y = ySize - 1; y >= 0; y--) {
183: for (short x = 0; x < xSize; x++) {
184: t = read();
185: if (t == -1)
186: throw new IOException("Unexpected EOF");
187: image[y * (xSize * zSize) + (x * zSize) + z] = (byte) t;
188: }
189: }
190: }
191:
192: return bi;
193: } // End of getImage
194:
195: public RgbFile(InputStream s) {
196: super (s);
197: } // End of RgbFile(URL)
198:
199: } // End of class RgbFile
200:
201: // End of file RgbFile.java
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