multisample offscreen rendering in TestRenderToMemory

gistfile1.diff

Index: src/test/jme3test/post/TestRenderToMemory.java
===================================================================
--- src/test/jme3test/post/TestRenderToMemory.java	(revision 9561)
+++ src/test/jme3test/post/TestRenderToMemory.java	(working copy)
@@ -75,6 +75,7 @@
     private float angle = 0;
 
     private FrameBuffer offBuffer;
+    private FrameBuffer resolveBuffer;
     private ViewPort offView;
     private Texture2D offTex;
     private Camera offCamera;
@@ -158,7 +159,9 @@
 
     public void updateImageContents(){
         cpuBuf.clear();
-        renderer.readFrameBuffer(offBuffer, cpuBuf);
+        // resolve multisampled framebuffer
+        renderer.copyFrameBuffer(offBuffer, resolveBuffer, false);
+        renderer.readFrameBuffer(resolveBuffer, cpuBuf);
 
         synchronized (image) {
             Screenshots.convertScreenShot(cpuBuf, image);    
@@ -180,8 +183,10 @@
         // frame buffer
         offView.addProcessor(this);
 
-        // create offscreen framebuffer
-        offBuffer = new FrameBuffer(width, height, 1);
+        // create multisampled offscreen framebuffer
+        offBuffer = new FrameBuffer(width, height, 4);
+        // create single sampled resolve framebuffer
+        resolveBuffer = new FrameBuffer(width, height, 1);
 
         //setup framebuffer's cam
         offCamera.setFrustumPerspective(45f, 1f, 1f, 1000f);
@@ -195,6 +200,7 @@
         // this is faster for gpu -> cpu copies
         offBuffer.setDepthBuffer(Format.Depth);
         offBuffer.setColorBuffer(Format.RGBA8);
+        resolveBuffer.setColorBuffer(Format.RGBA8);
 //        offBuffer.setColorTexture(offTex);
         
         //set viewport to render to offscreen framebuffer