package demos.es1;

import java.nio.*;
import javax.media.opengl.*;
import javax.media.opengl.util.*;
import javax.media.opengl.glu.*;

import com.sun.javafx.newt.*;

public class RedSquare implements MouseListener {

    public boolean quit = false;
    public boolean toggleFS = false;

    public void mouseClicked(MouseEvent e) {
        switch(e.getClickCount()) {
            case 1:
                toggleFS=true;
                break;
            default: 
                quit=true;
                break;
        }
    }
    public void mouseEntered(MouseEvent e) {
    }
    public void mouseExited(MouseEvent e) {
    }
    public void mousePressed(MouseEvent e) {
    }
    public void mouseReleased(MouseEvent e) {
    }
    public void mouseMoved(MouseEvent e) {
    }
    public void mouseDragged(MouseEvent e) {
    }

    public static void main(String[] args) {
        System.out.println("RedSquare.main()");
        GLProfile.setProfile(GLProfile.GLES1);
        try {
            Display display = NewtFactory.createDisplay(null); // local display
            Screen screen  = NewtFactory.createScreen(display, 0); // screen 0
            Window window = NewtFactory.createWindow(screen, 0); // dummy VisualID

            RedSquare ml = new RedSquare();
            window.addMouseListener(ml);

            // Size OpenGL to Video Surface
            int width = 800;
            int height = 480;
            window.setSize(width, height);
            window.setFullscreen(true);

            // Hook this into EGL
            GLDrawableFactory factory = GLDrawableFactory.getFactory(window);
            GLCapabilities caps = new GLCapabilities();
            // For emulation library, use 16 bpp
            caps.setRedBits(5);
            caps.setGreenBits(6);
            caps.setBlueBits(5);
            caps.setDepthBits(16);
            GLDrawable drawable = factory.createGLDrawable(window, caps, null);
            window.setVisible(true);
            drawable.setRealized(true);
            GLContext context = drawable.createContext(null);
            context.makeCurrent();

            GL2ES1 gl = context.getGL().getGL2ES1();
            GLU glu = new javax.media.opengl.glu.es1.GLUes1();

            //----------------------------------------------------------------------
            // Code for GLEventListener.init()
            //

            System.out.println("Entering initialization");
            System.out.println("GL_VERSION=" + gl.glGetString(GL2ES1.GL_VERSION));
            System.out.println("GL_EXTENSIONS:");
            System.out.println("  " + gl.glGetString(GL2ES1.GL_EXTENSIONS));

            // Allocate vertex arrays
            FloatBuffer colors   = BufferUtil.newFloatBuffer(16);
            FloatBuffer vertices = BufferUtil.newFloatBuffer(12);
            // Fill them up
            colors.put( 0, 1);    colors.put( 1, 0);     colors.put( 2, 0);    colors.put( 3, 1);
            colors.put( 4, 1);    colors.put( 5, 0);     colors.put( 6, 0);    colors.put( 7, 1);
            colors.put( 8, 1);    colors.put( 9, 0);     colors.put(10, 0);    colors.put(11, 1);
            colors.put(12, 1);    colors.put(13, 0);     colors.put(14, 0);    colors.put(15, 1);
            vertices.put(0, -2);  vertices.put( 1,  2);  vertices.put( 2,  0);
            vertices.put(3,  2);  vertices.put( 4,  2);  vertices.put( 5,  0);
            vertices.put(6, -2);  vertices.put( 7, -2);  vertices.put( 8,  0);
            vertices.put(9,  2);  vertices.put(10, -2);  vertices.put(11,  0);

            gl.glEnableClientState(GL2ES1.GL_VERTEX_ARRAY);
            gl.glVertexPointer(3, GL2ES1.GL_FLOAT, 0, vertices);
            gl.glEnableClientState(GL2ES1.GL_COLOR_ARRAY);
            gl.glColorPointer(4, GL2ES1.GL_FLOAT, 0, colors);

            // OpenGL Render Settings
            gl.glClearColor(0, 0, 0, 1);
            gl.glEnable(GL2ES1.GL_DEPTH_TEST);

            //----------------------------------------------------------------------
            // Code for GLEventListener.display()
            //
            
            long startTime = System.currentTimeMillis();
            long curTime;
            while (!ml.quit && ((curTime = System.currentTimeMillis()) - startTime) < 20000) {
                gl.glClear(GL2ES1.GL_COLOR_BUFFER_BIT | GL2ES1.GL_DEPTH_BUFFER_BIT);

                // Set location in front of camera
                width = window.getWidth();
                height = window.getHeight();
                gl.glViewport(0, 0, width, height);
                gl.glMatrixMode(GL2ES1.GL_PROJECTION);
                gl.glLoadIdentity();
                glu.gluPerspective(45.0f, (float)width / (float)height, 1.0f, 100.0f);
                gl.glMatrixMode(GL2ES1.GL_MODELVIEW);
                gl.glLoadIdentity();
                gl.glTranslatef(0, 0, -10);
                // One rotation every four seconds
                float ang = (((float) (curTime - startTime)) * 360.0f) / 4000.0f;
                gl.glRotatef(ang, 0, 0, 1);

                // Draw a square
                gl.glDrawArrays(GL2ES1.GL_TRIANGLE_STRIP, 0, 4);

                drawable.swapBuffers();

                if(ml.toggleFS) {
                    window.setFullscreen(!window.isFullscreen());
                    ml.toggleFS=false;
                }

                window.pumpMessages();
            }

            // Shut things down cooperatively
            context.release();
            context.destroy();
            drawable.destroy();
            factory.shutdown();
            System.out.println("RedSquare shut down cleanly.");
        } catch (Throwable t) {
            t.printStackTrace();
        }

        System.exit(0);
    }
}