merged pull requests from @allesblinkt (fixes #1880 and #2157)

core/src/processing/opengl/PGraphicsOpenGL.java

@@ -3082,7 +3082,11 @@ public class PGraphicsOpenGL extends PGraphics {
 
   @Override
   public void smooth() {
-    smooth(2);
+    if (quality < 2) {
+      smooth(2);
+    } else {
+      smooth(quality);
+    }
   }
 
 
@@ -3110,6 +3114,7 @@ public class PGraphicsOpenGL extends PGraphics {
       lastSmoothCall = parent.frameCount;
 
       quality = level;
+      
       if (quality == 1) {
         quality = 0;
       }

java/libraries/lwjgl/src/processing/lwjgl/PLWJGL.java

@@ -215,6 +215,9 @@ public class PLWJGL extends PGL {
     setFps = false;
   }
 
+    
+  protected void reinitSurface() { }
+  
   
   protected void registerListeners() {
     keyPoller = new KeyPoller(pg.parent);
@@ -1158,6 +1161,7 @@ public class PLWJGL extends PGL {
     SRC_ALPHA_SATURATE       = GL11.GL_SRC_ALPHA_SATURATE;
 
     SCISSOR_TEST    = GL11.GL_SCISSOR_TEST;
+    STENCIL_TEST    = GL11.GL_STENCIL_TEST;
     DEPTH_TEST      = GL11.GL_DEPTH_TEST;
     DEPTH_WRITEMASK = GL11.GL_DEPTH_WRITEMASK;
     ALPHA_TEST      = GL11.GL_ALPHA_TEST;