//
// PSDReader.java
//
/*
LOCI Bio-Formats package for reading and converting biological file formats.
Copyright (C) 2005-@year@ Melissa Linkert, Curtis Rueden, Chris Allan,
Eric Kjellman and Brian Loranger.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Library General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program 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 Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package loci.formats.in;
import java.io.IOException;
import loci.formats.*;
import loci.formats.codec.PackbitsCodec;
/** PSDReader is the file format reader for Photoshop PSD files. */
public class PSDReader extends FormatReader {
// -- Fields --
/** Lookup table. */
private byte[][] lut;
// -- Constructor --
/** Constructs a new PSD reader. */
public PSDReader() { super("Adobe Photoshop", "psd"); }
// -- IFormatReader API methods --
/* @see loci.formats.IFormatReader#isThisType(byte[]) */
public boolean isThisType(byte[] block) {
return new String(block).startsWith("8BPS");
}
/* @see loci.formats.IFormatReader#get8BitLookupTable() */
public byte[][] get8BitLookupTable() {
FormatTools.assertId(currentId, true, 1);
return lut;
}
/* @see loci.formats.IFormatReader#openBytes(int, byte[]) */
public byte[] openBytes(int no, byte[] buf)
throws FormatException, IOException
{
FormatTools.assertId(currentId, true, 1);
FormatTools.checkPlaneNumber(this, no);
FormatTools.checkBufferSize(this, buf.length);
if (in.getFilePointer() % 2 == 1) in.skipBytes(1);
in.skipBytes(4);
while (in.read() != '8');
in.skipBytes(7);
int len = in.readInt();
in.skipBytes(len);
while (in.readString(4).equals("8BIM")) {
in.skipBytes(4);
len = in.readInt();
in.skipBytes(len);
}
in.seek(in.getFilePointer() - 4);
int plane = core.sizeX[0] * core.sizeY[0] *
FormatTools.getBytesPerPixel(core.pixelType[0]);
int[][] lens = new int[core.sizeC[0]][core.sizeY[0]];
boolean compressed = in.readShort() == 1;
if (compressed) {
int pt = 0;
PackbitsCodec codec = new PackbitsCodec();
for (int c=0; c<core.sizeC[0]; c++) {
for (int y=0; y<core.sizeY[0]; y++) {
lens[c][y] = in.readShort();
}
}
for (int c=0; c<core.sizeC[0]; c++) {
for (int y=0; y<core.sizeY[0]; y++) {
byte[] b = new byte[lens[c][y]];
in.read(b);
b = codec.decompress(b);
System.arraycopy(b, 0, buf, pt, b.length);
pt += b.length;
}
}
}
else in.read(buf);
return buf;
}
// -- Internal FormatReader API methods --
/* @see loci.formats.FormatReader#initFile(String) */
protected void initFile(String id) throws FormatException, IOException {
if (debug) debug ("PSDReader.initFile(" + id + ")");
super.initFile(id);
in = new RandomAccessStream(id);
core.littleEndian[0] = false;
if (!in.readString(4).equals("8BPS")) {
throw new FormatException("Not a valid Photoshop file.");
}
int version = in.readShort();
addMeta("Version", new Integer(version));
in.skipBytes(6); // reserved, set to 0
core.sizeC[0] = in.readShort();
core.sizeY[0] = in.readInt();
core.sizeX[0] = in.readInt();
int bits = in.readShort();
addMeta("Bits per pixel", new Integer(bits));
switch (bits) {
case 16:
core.pixelType[0] = FormatTools.UINT16;
break;
default: core.pixelType[0] = FormatTools.UINT8;
}
int colorMode = in.readShort();
String modeString = null;
switch (colorMode) {
case 0:
modeString = "monochrome";
break;
case 1:
modeString = "gray-scale";
break;
case 2:
modeString = "palette color";
break;
case 3:
modeString = "RGB";
break;
case 4:
modeString = "CMYK";
break;
case 6:
modeString = "Duotone";
break;
case 7:
modeString = "Multichannel color";
break;
case 8:
modeString = "Duotone";
break;
case 9:
modeString = "LAB color";
break;
}
addMeta("Color mode", modeString);
// read color mode block, if present
int modeDataLength = in.readInt();
long fp = in.getFilePointer();
if (modeDataLength != 0) {
if (colorMode == 2) {
lut = new byte[3][256];
for (int i=0; i<lut.length; i++) {
in.read(lut[i]);
}
}
in.seek(fp + modeDataLength);
}
// read image resources block
in.skipBytes(4);
while (in.readString(4).equals("8BIM")) {
int tag = in.readShort();
int read = 1;
while (in.read() != 0) read++;
if (read % 2 == 1) in.skipBytes(1);
int size = in.readInt();
if (size % 2 == 1) size++;
byte[] data = new byte[size];
in.read(data);
}
in.seek(in.getFilePointer() - 4);
int blockLen = in.readInt();
int layerLen = in.readInt();
int layerCount = in.readShort();
int[] w = new int[layerCount];
int[] h = new int[layerCount];
int[] c = new int[layerCount];
for (int i=0; i<layerCount; i++) {
int top = in.readInt();
int left = in.readInt();
int bottom = in.readInt();
int right = in.readInt();
w[i] = right - left;
h[i] = bottom - top;
c[i] = in.readShort();
in.skipBytes(c[i] * 6);
in.skipBytes(4 + 4 + 4);
int len = in.readInt();
if (len % 2 == 1) len++;
in.skipBytes(len);
}
// skip over pixel data for each layer
for (int i=0; i<layerCount; i++) {
int[] lens = new int[h[i]];
for (int cc=0; cc<c[i]; cc++) {
boolean compressed = in.readShort() == 1;
if (!compressed) in.skipBytes(w[i] * h[i]);
else {
for (int y=0; y<h[i]; y++) {
lens[y] = in.readShort();
}
for (int y=0; y<h[i]; y++) {
in.skipBytes(lens[y]);
}
}
}
}
core.sizeZ[0] = 1;
core.sizeT[0] = 1;
core.rgb[0] = modeString.equals("RGB");
core.imageCount[0] = core.sizeC[0] / (core.rgb[0] ? 3 : 1);
core.indexed[0] = modeString.equals("palette color");
core.falseColor[0] = false;
core.currentOrder[0] = "XYCZT";
core.interleaved[0] = false;
core.littleEndian[0] = true;
core.metadataComplete[0] = true;
MetadataStore store = getMetadataStore();
FormatTools.populatePixels(store, this);
store.setImage(currentId, null, null, null);
for (int i=0; i<core.sizeC[0]; i++) {
store.setLogicalChannel(i, null, null, null, null, null, null, null, null,
null, null, null, null, null, null, null, null, null, null, null, null,
null, null, null, null);
}
}
}