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/*
* Created on Nov 18, 2003
*
*/
package jake2.imageio;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
/**
* @author cwei
*
*/
public class PCX {
public static final int HEADER_SIZE = 128;
/**
* <code>
typedef struct
{
char manufacturer;
char version;
char encoding;
char bits_per_pixel;
unsigned short xmin,ymin,xmax,ymax;
unsigned short horzRes,vertRes;
unsigned char palette[48];
char reserved;
char color_planes;
unsigned short bytes_per_line;
unsigned short palette_type;
char filler[58];
unsigned char data; // unbounded
} pcx_t;
</code>
*/
public static class Header {
// size of byte arrays
static final int PALETTE_SIZE = 48;
static final int FILLER_SIZE = 58;
byte manufacturer;
byte version;
byte encoding;
byte bitsPerPixel;
int xmin, ymin, xmax, ymax; // unsigned short
int horzRes, vertRes; // unsigned short
byte[] palette; //unsigned byte
byte reserved;
byte colorPlanes;
int bytesPerLine; // unsigned short
int paletteType; // unsigned short
byte[] filler;
public Header(byte[] headerBytes) {
if (headerBytes == null || headerBytes.length != 128) {
throw new IllegalArgumentException("invalid quake2 pcx header");
}
ByteBuffer b = ByteBuffer.wrap(headerBytes);
// is stored as little endian
b.order(ByteOrder.LITTLE_ENDIAN);
// fill header
manufacturer = b.get();
version = b.get();
encoding = b.get();
bitsPerPixel = b.get();
xmin = b.getShort() & 0xffff;
ymin = b.getShort() & 0xffff;
xmax = b.getShort() & 0xffff;
ymax = b.getShort() & 0xffff;
horzRes = b.getShort() & 0xffff;
vertRes = b.getShort() & 0xffff;
b.get(palette = new byte[PALETTE_SIZE]);
reserved = b.get();
colorPlanes = b.get();
bytesPerLine = b.getShort() & 0xffff;
paletteType = b.getShort() & 0xffff;
b.get(filler = new byte[FILLER_SIZE]);
// check some attributes
checkHeader();
}
private void checkHeader() {
if (this.getManufacturer() != 0x0a
|| this.getVersion() != 5
|| this.getEncoding() != 1
|| this.getBitsPerPixel() != 8
|| this.getXmax() >= 640
|| this.getYmax() >= 480) {
throw new IllegalArgumentException("invalid quake2 pcx header");
}
}
/**
* @return
*/
public byte getBitsPerPixel() {
return bitsPerPixel;
}
/**
* @return
*/
public int getBytesPerLine() {
return bytesPerLine;
}
/**
* @return
*/
public byte getColorPlanes() {
return colorPlanes;
}
/**
* @return
*/
public byte getEncoding() {
return encoding;
}
/**
* @return
*/
public byte[] getFiller() {
return filler;
}
/**
* @return
*/
public int getHeight() {
return ymax - ymin + 1;
}
/**
* @return
*/
public byte getManufacturer() {
return manufacturer;
}
/**
* @return
*/
public byte[] getPalette() {
return palette;
}
/**
* @return
*/
public int getPaletteType() {
return paletteType;
}
/**
* @return
*/
public byte getReserved() {
return reserved;
}
/**
* @return
*/
public byte getVersion() {
return version;
}
/**
* @return
*/
public int getWidth() {
return xmax - xmin + 1;
}
/**
* @return
*/
public int getXmax() {
return xmax;
}
/**
* @return
*/
public int getXmin() {
return xmin;
}
/**
* @return
*/
public int getYmax() {
return ymax;
}
/**
* @return
*/
public int getYmin() {
return ymin;
}
/**
* @return
*/
public int getHorzRes() {
return horzRes;
}
/**
* @return
*/
public int getVertRes() {
return vertRes;
}
}
}
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