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Shear in the xy-direction

import org.eclipse.swt.SWT; import org.eclipse.swt.events.PaintEvent; import org.eclipse.swt.events.PaintListener; import org.eclipse.swt.graphics.Font; import org.eclipse.swt.graphics.GC; import org.eclipse.swt.graphics.Image; import org.eclipse.swt.graphics.Rectangle; import org.eclipse.swt.graphics.Transform; import org.eclipse.swt.layout.FillLayout; import org.eclipse.swt.widgets.Canvas; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Shell; public class SheerXYDirection {   public static void main(String[] args) {     final Display display = new Display();     final Image image = new Image(display, 110, 60);     GC gc = new GC(image);     Font font = new Font(display, "Times", 30, SWT.BOLD);     gc.setFont(font);     gc.setBackground(display.getSystemColor(SWT.COLOR_RED));     gc.fillRectangle(0, 0, 110, 60);     gc.setForeground(display.getSystemColor(SWT.COLOR_WHITE));     gc.drawText("SWT", 10, 10, true);     font.dispose();     gc.dispose();     final Rectangle rect = image.getBounds();     Shell shell = new Shell(display);     shell.setText("Matrix Tranformations");     shell.setLayout(new FillLayout());     final Canvas canvas = new Canvas(shell, SWT.DOUBLE_BUFFERED);     canvas.addPaintListener(new PaintListener() {       public void paintControl(PaintEvent e) {         GC gc = e.gc;         gc.setAdvanced(true);         if (!gc.getAdvanced()) {           gc.drawText("Advanced graphics not supported", 30, 30, true);           return;         }         // Original image         int x = 30, y = 30;         gc.drawImage(image, x, y);         x += rect.width + 30;         Transform transform = new Transform(display);         // Shear in the x-direction         transform.setElements(1, 0, -1, 1, 0, 0);         gc.setTransform(transform);         gc.drawImage(image, 300, y);                  // Shear in y-direction         transform.setElements(1, -1, 0, 1, 0, 0);         gc.setTransform(transform);         gc.drawImage(image, 150, 475);         transform.dispose();       }     });     shell.setSize(350, 550);     shell.open();     while (!shell.isDisposed()) {       if (!display.readAndDispatch())         display.sleep();     }     image.dispose();     display.dispose();   } }