src/java.desktop/unix/classes/sun/awt/X11/XRobotPeer.java

*** 33,44 ****
  import sun.awt.X11GraphicsConfig;
  import sun.awt.X11GraphicsEnvironment;
  
  class XRobotPeer implements RobotPeer {
  
!     private static volatile boolean isGtkSupported;
      private X11GraphicsConfig   xgc = null;
      /*
       * native implementation uses some static shared data (pipes, processes)
       * so use a class lock to synchronize native method calls
       */
      static Object robotLock = new Object();
--- 33,50 ----
  import sun.awt.X11GraphicsConfig;
  import sun.awt.X11GraphicsEnvironment;
  
  class XRobotPeer implements RobotPeer {
  
!     static final boolean tryGtk;
!     static {
!         tryGtk = Boolean.getBoolean("awt.robot.gtk");
!     }
!     
!     private static volatile boolean useGtk;
      private X11GraphicsConfig   xgc = null;
+     
      /*
       * native implementation uses some static shared data (pipes, processes)
       * so use a class lock to synchronize native method calls
       */
      static Object robotLock = new Object();
*** 47,63 ****
          this.xgc = (X11GraphicsConfig)gc;
          SunToolkit tk = (SunToolkit)Toolkit.getDefaultToolkit();
          setup(tk.getNumberOfButtons(),
                  AWTAccessor.getInputEventAccessor().getButtonDownMasks());
  
          Toolkit toolkit = Toolkit.getDefaultToolkit();
-         if (!isGtkSupported) {
              if (toolkit instanceof UNIXToolkit
                      && ((UNIXToolkit) toolkit).loadGTK()) {
                  isGtkSupported = true;
              }
          }
      }
  
      @Override
      public void dispose() {
          // does nothing
--- 53,72 ----
          this.xgc = (X11GraphicsConfig)gc;
          SunToolkit tk = (SunToolkit)Toolkit.getDefaultToolkit();
          setup(tk.getNumberOfButtons(),
                  AWTAccessor.getInputEventAccessor().getButtonDownMasks());
  
+         boolean isGtkSupported =  false;
+         if (tryGtk && !isGtkSupported) {
              Toolkit toolkit = Toolkit.getDefaultToolkit();
              if (toolkit instanceof UNIXToolkit
                      && ((UNIXToolkit) toolkit).loadGTK()) {
                  isGtkSupported = true;
              }
          }
+         
+         useGtk = (tryGtk && isGtkSupported);
      }
  
      @Override
      public void dispose() {
          // does nothing
*** 102,120 ****
  
      @Override
      public int getRGBPixel(int x, int y) {
          int pixelArray[] = new int[1];
          getRGBPixelsImpl(xgc, x, y, 1, 1, xgc.getScale(), pixelArray,
!                          isGtkSupported);
          return pixelArray[0];
      }
  
      @Override
      public int [] getRGBPixels(Rectangle bounds) {
          int pixelArray[] = new int[bounds.width*bounds.height];
          getRGBPixelsImpl(xgc, bounds.x, bounds.y, bounds.width, bounds.height,
!                          xgc.getScale(), pixelArray, isGtkSupported);
          return pixelArray;
      }
  
      private static synchronized native void setup(int numberOfButtons, int[] buttonDownMasks);
  
--- 111,129 ----
  
      @Override
      public int getRGBPixel(int x, int y) {
          int pixelArray[] = new int[1];
          getRGBPixelsImpl(xgc, x, y, 1, 1, xgc.getScale(), pixelArray,
!                          useGtk);
          return pixelArray[0];
      }
  
      @Override
      public int [] getRGBPixels(Rectangle bounds) {
          int pixelArray[] = new int[bounds.width*bounds.height];
          getRGBPixelsImpl(xgc, bounds.x, bounds.y, bounds.width, bounds.height,
!                          xgc.getScale(), pixelArray, useGtk);
          return pixelArray;
      }
  
      private static synchronized native void setup(int numberOfButtons, int[] buttonDownMasks);