don't depend on sharedrawweb

use directly sharedrawweb java code here

Signed-off-by: philippe lhardy <philippe.lhardy@astrolabe.coop>

java/org/artisanlogiciel/graphics/IMAWriter.java

@@ -0,0 +1,143 @@
+package org.artisanlogiciel.graphics;
+
+import java.awt.Point;
+import java.io.DataOutputStream;
+import java.io.IOException;
+import java.util.ArrayList;
+
+/**
+ * Write a DrawLine (using its internal Vector representation) into IMA format
+ * this is with loss ( ima is a 255x255 point resolution )
+ *
+ * @author philippe
+ *
+ */
+public class IMAWriter {
+
+    private final ArrayList<DrawingLine> mLines;
+
+    private int mByteCount = 0;
+    // need to compute bounding box and normalize to 255x255
+    private Point mOrig = new Point(100000,100000);
+    private Point mMax = new Point(-100000,-100000);
+    double ratioX = .1;
+    double ratioY = .1;
+	
+    public IMAWriter(ArrayList<DrawingLine> pLines)
+    {
+	mLines = pLines;
+	setup();
+    }
+
+    private void updateOrigMax(Point p)
+    {
+	double ox = mOrig.getX(), oy = mOrig.getY(), mx = mMax.getX(), my = mMax.getY();
+	
+	if (p.getX() < ox )
+	    {
+		ox = p.getX();
+	    }
+	if (p.getX() > mx)
+	    {
+		mx = p.getX();
+	    }
+	if (p.getY() < oy )
+	    {
+		oy = p.getY();
+	    }
+	if (p.getY() > my)
+	    {
+		my = p.getY();
+	    }
+	mOrig.setLocation(ox,oy);
+	mMax.setLocation(mx,my);
+	
+    }
+
+    private void setup()
+    {
+	int count = 0;
+	for (DrawingLine line : mLines)
+	    {
+		for (Point p : line.getPoints())
+		    {
+			updateOrigMax(p);
+			count+=2;
+		    }
+		// beam on + off
+		count+=4;
+	    }
+	mByteCount=count;
+	if ( mMax.getX() != mOrig.getX())
+	    {
+		ratioX = 255 / (mMax.getX() - mOrig.getX());
+	    }
+	else
+	    {
+		ratioX = 1.;
+	    }
+	if ( mMax.getY() != mOrig.getY())
+	    {
+		ratioY = 255 / (mMax.getY() - mOrig.getY());
+	    }
+	else
+	    {
+		ratioY = 1.;
+	    }
+
+    }
+
+    public void writeTo(DataOutputStream pData)
+	throws IOException
+    {
+	int wrote = 0;
+	// writeheader : number of points ...
+	// little endian unsigned short.
+	pData.writeByte(mByteCount%256);
+	pData.writeByte(mByteCount/256);	    
+	for (DrawingLine line : mLines)
+	    {
+		// write ima line
+		wrote += writeLine(pData, line.getPoints());
+	    }
+	    
+    }
+
+    void writeBeamOnOff(DataOutputStream pData,boolean pOn)
+	throws IOException
+    {
+	pData.writeByte(0xff);
+	pData.writeByte(pOn ? 0xff : 0xfe);
+    }
+
+    void writePoint(DataOutputStream pData,Point pPoint)
+	throws IOException
+    {
+	int x = (int) ((pPoint.getX()-mOrig.getX()) * ratioX);
+	int y = 255 - ((int) ((pPoint.getY()-mOrig.getY()) * ratioY));
+	if ( x == 0xff )
+	    {
+		x=0xfe;
+	    }
+	pData.writeByte(x);
+	pData.writeByte(y);
+    }
+    
+    int writeLine(DataOutputStream pData,ArrayList<Point> pPoints)	
+	throws IOException
+    {
+	int count = 0;
+
+	for (Point p : pPoints)
+	    {
+		writePoint(pData,p);
+		if ( count == 0 )
+		    {
+			writeBeamOnOff(pData,true);
+		    }		       
+		count++;
+	    }
+	writeBeamOnOff(pData,false);
+	return 2*(count +2);
+    }
+}