Attachment 164 Details for Bug 429 – Simple test case to duplicate problem.

Simple test case to duplicate problem.

OneTriangle.java (text/plain), 3.79 KB, created by Wade Walker on 2010-11-16 15:38:44 CET

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Creator: Wade Walker

Created: 2010-11-16 15:38:44 CET

Size: 3.79 KB

patch

obsolete

>package name.wadewalker.onetriangle;
>
>import org.eclipse.swt.SWT;
>import org.eclipse.swt.events.PaintEvent;
>import org.eclipse.swt.events.PaintListener;
>import org.eclipse.swt.graphics.Rectangle;
>import org.eclipse.swt.layout.FillLayout;
>import org.eclipse.swt.opengl.GLCanvas;
>import org.eclipse.swt.opengl.GLData;
>import org.eclipse.swt.widgets.Composite;
>import org.eclipse.swt.widgets.Display;
>import org.eclipse.swt.widgets.Event;
>import org.eclipse.swt.widgets.Listener;
>import org.eclipse.swt.widgets.Shell;
>
>import javax.media.opengl.GL;
>import javax.media.opengl.GLProfile;
>import javax.media.opengl.GL2;
>import javax.media.opengl.GLContext;
>import javax.media.opengl.GLDrawableFactory;
>import javax.media.opengl.glu.GLU;
>
>public class OneTriangle {
>
>    public static void main(String [] args) {
>		GLProfile.initSingleton( true );
>		
>        GLProfile glprofile = GLProfile.get( GLProfile.GL2 );
>
>        Display display = new Display();
>		Shell shell = new Shell( display );
>		shell.setLayout( new FillLayout() );
>		Composite composite = new Composite( shell, SWT.NONE );
>        composite.setLayout( new FillLayout() );
>
>        GLData gldata = new GLData();
>        gldata.doubleBuffer = true;
>        // need SWT.NO_BACKGROUND to prevent SWT from clearing the window
>        // at the wrong times (we use glClear for this instead)
>        final GLCanvas glcanvas = new GLCanvas( composite, SWT.NO_BACKGROUND, gldata );
>        glcanvas.setCurrent();
>        final GLContext glcontext = GLDrawableFactory.getFactory( glprofile ).createExternalGLContext();
>
>        // fix the viewport when the user resizes the window
>        glcanvas.addListener( SWT.Resize, new Listener() {
>            public void handleEvent(Event event) {
>            	setup( glcanvas, glcontext );
>            }
>        });
>
>        // draw the triangle when the OS tells us that any part of the window needs drawing
>        glcanvas.addPaintListener( new PaintListener() {
>            public void paintControl( PaintEvent paintevent ) {
>                render( glcanvas, glcontext );
>            }
>        });
>		
>		shell.setText( "OneTriangle" );
>		shell.setSize( 640, 480 );
>		shell.open();
>
>		while( !shell.isDisposed() ) {
>			if( !display.readAndDispatch() )
>				display.sleep();
>		}
>
>        glcanvas.dispose();
>		display.dispose();
>    }
>
>    private static void setup( GLCanvas glcanvas, GLContext glcontext ) {
>        Rectangle rectangle = glcanvas.getClientArea();
>
>        glcanvas.setCurrent();
>        glcontext.makeCurrent();
>
>        GL2 gl = glcontext.getGL().getGL2();
>        gl.glMatrixMode( GL2.GL_PROJECTION );
>        gl.glLoadIdentity();
>
>        // coordinate system origin at lower left with width and height same as the window
>        GLU glu = new GLU();
>        glu.gluOrtho2D( 0.0f, rectangle.width, 0.0f, rectangle.height );
>
>        gl.glMatrixMode( GL2.GL_MODELVIEW );
>        gl.glLoadIdentity();
>
>        gl.glViewport( 0, 0, rectangle.width, rectangle.height );
>        glcontext.release();    	
>    }
>
>    private static void render( GLCanvas glcanvas, GLContext glcontext ) {
>        Rectangle rectangle = glcanvas.getClientArea();
>
>        glcanvas.setCurrent();
>        glcontext.makeCurrent();
>
>        GL2 gl = glcontext.getGL().getGL2();
>        gl.glClear( GL.GL_COLOR_BUFFER_BIT );
>
>        // draw a triangle filling the window
>        gl.glLoadIdentity();
>        gl.glBegin( GL.GL_TRIANGLES );
>        gl.glColor3f( 1, 0, 0 );
>        gl.glVertex2f( 0, 0 );
>        gl.glColor3f( 0, 1, 0 );
>        gl.glVertex2f( rectangle.width, 0 );
>        gl.glColor3f( 0, 0, 1 );
>        gl.glVertex2f( rectangle.width / 2, rectangle.height );
>        gl.glEnd();
>
>        glcanvas.swapBuffers();
>        glcontext.release();    	
>    }
>}
>

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