org.monte.media.pbm.PBMDecoder Maven / Gradle / Ivy
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package org.monte.media.pbm;
import org.monte.media.AbortException;
import org.monte.media.ParseException;
import org.monte.media.iff.*;
import org.monte.media.ilbm.CRNGColorCycle;
import org.monte.media.ilbm.ColorCycle;
import org.monte.media.ilbm.DRNGColorCycle;
import org.monte.media.ilbm.ColorCyclingMemoryImageSource;
import java.io.*;
import java.util.*;
import java.awt.image.*;
import java.net.URL;
public class PBMDecoder implements IFFVisitor {
protected final static int PBM_ID = IFFParser.stringToID("PBM ");
protected final static int BMHD_ID = IFFParser.stringToID("BMHD");
protected final static int CMAP_ID = IFFParser.stringToID("CMAP");
protected final static int CRNG_ID = IFFParser.stringToID("CRNG");
protected final static int DRNG_ID = IFFParser.stringToID("DRNG");
protected final static int BODY_ID = IFFParser.stringToID("BODY");
private final static int AUTH_ID = IFFParser.stringToID("AUTH");
private final static int ANNO_ID = IFFParser.stringToID("ANNO");
private final static int COPYRIGHT_ID = IFFParser.stringToID("(c) ");
protected final static int MSK_NONE = 0,
MSK_HAS_MASK = 1,
MSK_HAS_TRANSPARENT_COLOR = 2,
MSK_LASSO = 3;
protected final static int CMP_NONE = 0,
CMP_BYTE_RUN_1 = 1;
protected InputStream inputStream;
protected URL location;
protected ArrayList sources;
protected Hashtable properties;
protected int bmhdWidth, bmhdHeight;
protected int bmhdXPosition, bmhdYPosition;
protected int bmhdNbPlanes;
protected int bmhdMasking;
protected int bmhdCompression;
protected int bmhdTransparentColor;
protected int bmhdXAspect, bmhdYAspect;
protected int bmhdPageWidth, bmhdPageHeight;
protected ColorModel cmapColorModel;
protected ColorCyclingMemoryImageSource memoryImageSource;
public PBMDecoder(InputStream in) {
inputStream = in;
}
public PBMDecoder(URL location) {
this.location = location;
}
public ArrayList produce()
throws IOException {
InputStream in = null;
sources = new ArrayList();
boolean mustCloseStream;
if (inputStream != null) {
in = inputStream;
mustCloseStream = false;
} else {
in = location.openStream();
mustCloseStream = true;
}
try {
IFFParser iff = new IFFParser();
registerChunks(iff);
iff.parse(in, this);
} catch (ParseException e1) {
e1.printStackTrace();
} catch (AbortException e) {
e.printStackTrace();
} finally {
if (mustCloseStream) {
in.close();
}
}
return sources;
}
public void registerChunks(IFFParser iff) {
iff.declareGroupChunk(PBM_ID, IFFParser.ID_FORM);
iff.declarePropertyChunk(PBM_ID, BMHD_ID);
iff.declarePropertyChunk(PBM_ID, CMAP_ID);
iff.declareDataChunk(PBM_ID, BODY_ID);
iff.declareCollectionChunk(PBM_ID, ANNO_ID);
iff.declareCollectionChunk(PBM_ID, COPYRIGHT_ID);
iff.declareCollectionChunk(PBM_ID, AUTH_ID);
iff.declareCollectionChunk(PBM_ID, CRNG_ID);
iff.declareCollectionChunk(PBM_ID, DRNG_ID);
}
@Override
public void enterGroup(IFFChunk chunk) {
}
@Override
public void leaveGroup(IFFChunk chunk) {
}
@Override
@SuppressWarnings("unchecked")
public void visitChunk(IFFChunk group, IFFChunk chunk)
throws ParseException, AbortException {
decodeBMHD(group.getPropertyChunk(BMHD_ID));
decodeCMAP(group.getPropertyChunk(CMAP_ID));
decodeBODY(chunk);
double aspect = (double) bmhdXAspect / (double) bmhdYAspect;
if (bmhdXAspect == 0 || bmhdYAspect == 0) {
aspect = 1d;
}
Hashtable props = memoryImageSource.getProperties();
props.put("aspect", new Double(aspect));
String s = "Indexed Colors";
props.put("screenMode", s);
props.put("nbPlanes", "" + bmhdNbPlanes + (((bmhdMasking & MSK_HAS_MASK) != 0) ? "+mask" : ""));
StringBuffer comment = new StringBuffer();
IFFChunk[] chunks = group.getCollectionChunks(ANNO_ID);
for (int i = 0; i < chunks.length; i++) {
if (comment.length() > 0) {
comment.append('\n');
}
comment.append(new String(chunks[i].getData()));
}
chunks = group.getCollectionChunks(AUTH_ID);
for (int i = 0; i < chunks.length; i++) {
if (comment.length() > 0) {
comment.append('\n');
}
comment.append("Author: ");
comment.append(new String(chunks[i].getData()));
}
chunks = group.getCollectionChunks(COPYRIGHT_ID);
for (int i = 0; i < chunks.length; i++) {
if (comment.length() > 0) {
comment.append('\n');
}
comment.append("© ");
comment.append(new String(chunks[i].getData()));
}
if (comment.length() > 0) {
props.put("comment", comment.toString());
}
IFFChunk[] crngChunks = group.getCollectionChunks(CRNG_ID);
IFFChunk[] drngChunks = group.getCollectionChunks(DRNG_ID);
int activeCycles = 0;
int j = 0, k = 0;
for (int i = 0, n = crngChunks.length + drngChunks.length; i < n; i++) {
if (j < crngChunks.length && (k >= drngChunks.length || crngChunks[j].getScan() < drngChunks[k].getScan())) {
ColorCycle cc = decodeCRNG(crngChunks[j]);
memoryImageSource.addColorCycle(cc);
if (cc.isActive()) {
activeCycles++;
}
j++;
} else {
ColorCycle cc = decodeDRNG(drngChunks[k]);
memoryImageSource.addColorCycle(cc);
if (cc.isActive()) {
activeCycles++;
}
k++;
}
}
if (activeCycles > 0) {
memoryImageSource.setAnimated(true);
props.put("colorCycling", activeCycles);
}
sources.add(memoryImageSource);
}
protected void decodeBMHD(IFFChunk chunk)
throws ParseException {
if (chunk == null) {
throw new ParseException("no BMHD -> no Picture");
}
try {
MC68000InputStream in = new MC68000InputStream(new ByteArrayInputStream(chunk.getData()));
bmhdWidth = in.readUWORD();
bmhdHeight = in.readUWORD();
bmhdXPosition = in.readWORD();
bmhdYPosition = in.readWORD();
bmhdNbPlanes = in.readUBYTE();
bmhdMasking = in.readUBYTE();
bmhdCompression = in.readUBYTE();
in.skip(1);
bmhdTransparentColor = in.readUWORD();
bmhdXAspect = in.readUBYTE();
bmhdYAspect = in.readUBYTE();
bmhdPageWidth = in.readWORD();
bmhdPageHeight = in.readWORD();
in.close();
} catch (IOException e) {
throw new ParseException(e.toString());
}
}
protected void decodeCMAP(IFFChunk chunk)
throws ParseException {
byte[] red;
byte[] green;
byte[] blue;
byte[] alpha;
int size = 0;
int colorsToRead = 0;
size = ((bmhdMasking & MSK_HAS_MASK) != 0) ? 2 << bmhdNbPlanes : 1 << bmhdNbPlanes;
colorsToRead = Math.min(size, (int) chunk.getSize() / 3);
red = new byte[size];
green = new byte[size];
blue = new byte[size];
byte[] data = chunk.getData();
int j = 0;
for (int i = 0; i < colorsToRead; i++) {
red[i] = data[j++];
green[i] = data[j++];
blue[i] = data[j++];
}
int transparentColorIndex = ((bmhdMasking & MSK_HAS_TRANSPARENT_COLOR) != 0) ? bmhdTransparentColor : -1;
if ((bmhdMasking & MSK_HAS_MASK) != 0) {
System.arraycopy(red, 0, red, red.length / 2, red.length / 2);
System.arraycopy(green, 0, green, green.length / 2, green.length / 2);
System.arraycopy(blue, 0, blue, blue.length / 2, blue.length / 2);
alpha = new byte[red.length];
for (int i = 0, n = red.length / 2; i < n; i++) {
alpha[i] = (byte) 0xff;
}
cmapColorModel = new IndexColorModel(8, red.length, red, green, blue, alpha);
} else {
cmapColorModel = new IndexColorModel(8, red.length, red, green, blue, transparentColorIndex);
}
}
protected ColorCycle decodeCRNG(IFFChunk chunk)
throws ParseException {
ColorCycle cc;
try {
MC68000InputStream in = new MC68000InputStream(new ByteArrayInputStream(chunk.getData()));
int pad1 = in.readUWORD();
int rate = in.readUWORD();
int flags = in.readUWORD();
int low = in.readUBYTE();
int high = in.readUBYTE();
cc = new CRNGColorCycle(rate, 273, low, high,
(flags & 1) != 0 && rate > 36 && high > low,
(flags & 2) != 0, false);
in.close();
} catch (IOException e) {
throw new ParseException(e.toString());
}
return cc;
}
protected ColorCycle decodeDRNG(IFFChunk chunk)
throws ParseException {
ColorCycle cc;
try {
MC68000InputStream in = new MC68000InputStream(new ByteArrayInputStream(chunk.getData()));
int min = in.readUBYTE();
int max = in.readUBYTE();
int rate = in.readUWORD();
int flags = in.readUWORD();
int ntrue = in.readUBYTE();
int nregs = in.readUBYTE();
DRNGColorCycle.Cell[] cells = new DRNGColorCycle.Cell[ntrue + nregs];
for (int i = 0; i < ntrue; i++) {
int cell = in.readUBYTE();
int rgb = (in.readUBYTE() << 16) | (in.readUBYTE() << 8) | in.readUBYTE();
cells[i] = new DRNGColorCycle.DColorCell(cell, rgb);
}
for (int i = 0; i < nregs; i++) {
int cell = in.readUBYTE();
int index = in.readUBYTE();
cells[i + ntrue] = new DRNGColorCycle.DIndexCell(cell, index);
}
cc = new DRNGColorCycle(rate, 273, min, max,
(flags & 1) != 0 && rate > 36 && min <= max && ntrue + nregs > 1,
false, cells);
in.close();
} catch (IOException e) {
throw new ParseException(e.toString());
}
return cc;
}
protected void decodeBODY(IFFChunk chunk)
throws ParseException {
int pixmapWidth = (bmhdWidth % 2 == 1) ? bmhdWidth + 1 : bmhdWidth;
byte[] pixels = new byte[pixmapWidth * bmhdHeight];
byte[] data = chunk.getData();
switch (bmhdCompression) {
case CMP_NONE:
System.arraycopy(data, 0, pixels, 0, data.length);
break;
case CMP_BYTE_RUN_1:
unpackByteRun1(data, pixels);
break;
default:
throw new ParseException("unknown compression method: " + bmhdCompression);
}
Hashtable props = new Hashtable();
if ((bmhdMasking & MSK_HAS_MASK) != 0) {
System.out.println("PBMDecoder Images with Mask not supported");
memoryImageSource = new ColorCyclingMemoryImageSource(bmhdWidth, bmhdHeight, cmapColorModel, pixels, 0, pixmapWidth, props);
} else {
memoryImageSource = new ColorCyclingMemoryImageSource(bmhdWidth, bmhdHeight, cmapColorModel, pixels, 0, pixmapWidth, props);
}
}
public static int unpackByteRun1(byte[] in, byte[] out)
throws ParseException {
try {
return MC68000InputStream.unpackByteRun1(in, out);
} catch (IOException ex) {
ParseException e = new ParseException("couldn't decompress body");
e.initCause(ex);
throw e;
}
}
}
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