// Copyright 2001, FreeHEP.
package org.freehep.graphicsio.emf;
import com.google.code.appengine.awt.Color;
import com.google.code.appengine.awt.Dimension;
import com.google.code.appengine.awt.Point;
import com.google.code.appengine.awt.Rectangle;
import com.google.code.appengine.awt.geom.AffineTransform;
import java.io.IOException;
import java.io.InputStream;
import org.freehep.util.io.ActionHeader;
import org.freehep.util.io.TagHeader;
import org.freehep.util.io.TaggedInputStream;
/**
* This class extends the TaggedInputStream with several methods to read EMF
* primitives from the stream and to read TagHeaders.
*
* @author Mark Donszelmann
* @version $Id: EMFInputStream.java 10367 2007-01-22 19:26:48Z duns $
*/
public class EMFInputStream extends TaggedInputStream implements EMFConstants {
public static int DEFAULT_VERSION = 1;
public EMFInputStream(InputStream is) {
this(is, DEFAULT_VERSION);
}
public EMFInputStream(InputStream is, int version) {
this(is, new EMFTagSet(version));
}
public EMFInputStream(InputStream is, EMFTagSet tagSet) {
// EMF is little-endian
super(is, tagSet, null, true);
}
public int readDWORD() throws IOException {
long i = readUnsignedInt();
return (int) i;
}
public int[] readDWORD(int size) throws IOException {
int[] x = new int[size];
for (int i = 0; i < x.length; i++) {
x[i] = readDWORD();
}
return x;
}
public int readWORD() throws IOException {
return readUnsignedShort();
}
public int readLONG() throws IOException {
return readInt();
}
public int[] readLONG(int size) throws IOException {
int[] x = new int[size];
for (int i = 0; i < x.length; i++) {
x[i] = readLONG();
}
return x;
}
public float readFLOAT() throws IOException {
return readFloat();
}
public int readUINT() throws IOException {
return (int) readUnsignedInt();
}
public int readULONG() throws IOException {
return (int) readUnsignedInt();
}
public Color readCOLORREF() throws IOException {
Color c = new Color(readUnsignedByte(), readUnsignedByte(),
readUnsignedByte());
readByte();
return c;
}
public Color readCOLOR16() throws IOException {
return new Color(readShort() >> 8, readShort() >> 8, readShort() >> 8,
readShort() >> 8);
}
public AffineTransform readXFORM() throws IOException {
return new AffineTransform(readFLOAT(), readFLOAT(), readFLOAT(),
readFLOAT(), readFLOAT(), readFLOAT());
}
public Rectangle readRECTL() throws IOException {
int x = readLONG();
int y = readLONG();
int w = readLONG() - x;
int h = readLONG() - y;
return new Rectangle(x, y, w, h);
}
public Point readPOINTL() throws IOException {
int x = readLONG();
int y = readLONG();
return new Point(x, y);
}
public Point[] readPOINTL(int size) throws IOException {
Point[] p = new Point[size];
for (int i = 0; i < p.length; i++) {
p[i] = readPOINTL();
}
return p;
}
public Point readPOINTS() throws IOException {
int x = readShort();
int y = readShort();
return new Point(x, y);
}
public Point[] readPOINTS(int size) throws IOException {
Point[] p = new Point[size];
for (int i = 0; i < p.length; i++) {
p[i] = readPOINTS();
}
return p;
}
public Dimension readSIZEL() throws IOException {
return new Dimension(readLONG(), readLONG());
}
public int readBYTE() throws IOException {
return readByte();
}
public byte[] readBYTE(int size) throws IOException {
byte[] x = new byte[size];
for (int i = 0; i < x.length; i++) {
x[i] = (byte) readBYTE();
}
return x;
}
public boolean readBOOLEAN() throws IOException {
return (readBYTE() != 0);
}
public String readWCHAR(int size) throws IOException {
byte[] bytes = readByte(2 * size);
int length = 2 * size;
for (int i = 0; i < 2 * size; i += 2) {
if (bytes[i] == 0 && bytes[i + 1] == 0) {
length = i;
break;
}
}
return new String(bytes, 0, length, "UTF-16LE");
}
protected TagHeader readTagHeader() throws IOException {
// Read the tag.
// byteAlign();
int tagID = read();
// End of stream
if (tagID == -1)
return null;
tagID |= readUnsignedByte() << 8;
tagID |= readUnsignedByte() << 16;
tagID |= readUnsignedByte() << 24;
long length = readDWORD();
return new TagHeader(tagID, length - 8);
}
protected ActionHeader readActionHeader() throws IOException {
return null;
}
private EMFHeader header;
public EMFHeader readHeader() throws IOException {
if (header == null) {
header = new EMFHeader(this);
}
return header;
}
public int getVersion() {
return DEFAULT_VERSION;
}
}