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// Font rendering using GL4Java
// by Pontus Lidman
// (c) 2000 MathCore AB
import gl4java.awt.*;
import javax.swing.*;
import java.awt.Dimension;
import gl4java.GLContext;
import gl4java.GLFunc;
import java.awt.Font;
import java.awt.Shape;
import java.awt.font.*;
import java.awt.geom.*;
public class glJavaFontTest1 {
protected class MyCanvas extends GLCanvas {
public void drawString(String s,double x,double y) {
Font font=new Font("timesroman",Font.PLAIN,12);
AffineTransform identity=new AffineTransform();
FontRenderContext frc=new FontRenderContext(identity,false,false);
GlyphVector g=font.createGlyphVector(frc,s);
Shape shp=g.getOutline();
FlatteningPathIterator path=new FlatteningPathIterator(shp.getPathIterator(identity),0.05);
double [] coords=new double[6];
int type;
while (!path.isDone()) {
type=path.currentSegment(coords);
switch(type) {
case PathIterator.SEG_MOVETO:
gl.glBegin(GL_LINE_STRIP);
gl.glVertex2d(x+coords[0],y+coords[1]);
break;
case PathIterator.SEG_LINETO:
gl.glVertex2d(x+coords[0],y+coords[1]);
break;
case PathIterator.SEG_CLOSE:
gl.glEnd();
break;
}
path.next();
}
}
public MyCanvas(int w, int h) {
super(w,h);
GLContext.gljNativeDebug = false;
GLContext.gljClassDebug = false;
}
public void init() {
gl.glMatrixMode(GL_PROJECTION);
gl.glOrtho(-50,50,50,-50,-50.0,50.0);
gl.glMatrixMode(GL_MODELVIEW);
glj.gljCheckGL();
}
public void reshape(int w, int h) {
Dimension d=new Dimension(w,h);
if (!cvsIsInit()) return;
if( glj.gljMakeCurrent() == false ) {
System.out.println("problem in use() method");
return;
}
setSize(d);
gl.glViewport(0,0,w,h);
glj.gljCheckGL();
glj.gljFree();
}
public void display() {
int i;
if( glj.gljMakeCurrent() == false ) {
System.out.println("problem in use() method");
return;
}
gl.glPushMatrix();
gl.glClear(GL_COLOR_BUFFER_BIT);
glu.gluLookAt(0, 0, 20, 0, 0, 0, 0, 1, 0);
gl.glColor3d(1,1,1);
drawString("Hello world!",-40,0);
gl.glPopMatrix();
glj.gljSwap();
glj.gljCheckGL();
glj.gljFree();
}
}
protected MyCanvas cvs;
protected JFrame frame;
public glJavaFontTest1() {
frame = new JFrame( "OpenGL" );
cvs= new MyCanvas(640,480);
frame.setSize(640,480);
frame.getContentPane().add("Center", cvs);
frame.setVisible(true);
}
public static void main(java.lang.String[] args) {
try {
glJavaFontTest1 g=new glJavaFontTest1();
} catch (Throwable exception) {
System.err.println("Exception occurred in main()");
exception.printStackTrace(System.out);
}
}
}
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