draw exit label in PGL

core/src/processing/opengl/PGL.java

@@ -580,6 +580,7 @@ public abstract class PGL {
   }
 
 
+  int labelTex = -1;
   protected void endDraw(boolean clear0) {
     if (fboLayerInUse) {
       syncBackTexture();
@@ -596,6 +597,21 @@ public abstract class PGL {
         clearDepth(1);
         clearColor(r, g, b, a);
         clear(COLOR_BUFFER_BIT | DEPTH_BUFFER_BIT);
+
+        if (labelTex == -1) {
+//          labelTex = new Texture(pg);
+//          labelTex.init(100, 50,
+//                        glColorTex.get(backTex), TEXTURE_2D, RGBA,
+//                        fboWidth, fboHeight, NEAREST, NEAREST,
+//                        CLAMP_TO_EDGE, CLAMP_TO_EDGE);
+        }
+
+        // Don't use presentMode offset!
+//        drawTexture2D(labelTex, int texW, int texH, int scrW, int scrH,
+//                      int texX0, int texY0, int texX1, int texY1,
+//                      int scrX0, int scrY0, int scrX1, int scrY1);
+
+
       } else {
         clearDepth(1);
         clearColor(0, 0, 0, 0);

java/libraries/lwjgl/src/processing/lwjgl/PSurfaceLWJGL.java

@@ -426,8 +426,6 @@ public class PSurfaceLWJGL implements PSurface {
       label.setLocation(20, screenRect.height - labelSize.height - 20);
     }
     */
-    
-    
   }
 
   @Override
@@ -1007,6 +1005,15 @@ public class PSurfaceLWJGL implements PSurface {
             }
           } else if (pressed) {
             action = MouseEvent.RELEASE;
+
+            if (presentMode) {
+              if (20 < Mouse.getX() && Mouse.getX() < 20 + 100 &&
+                  20 < Mouse.getY() && Mouse.getY() < 20 + 50) {
+                System.err.println("clicked on exit button");
+                sketch.exit();  
+              }
+            }
+            
             pressed = false;
           } else {
             action = MouseEvent.MOVE;