2 files changed, 23 insertions, 13 deletions
diff --git a/src/jogl/classes/com/jogamp/opengl/util/GLDrawableUtil.java b/src/jogl/classes/com/jogamp/opengl/util/GLDrawableUtil.java
index ec6d54d66..cf88e7bf6 100644
--- a/src/jogl/classes/com/jogamp/opengl/util/GLDrawableUtil.java
+++ b/src/jogl/classes/com/jogamp/opengl/util/GLDrawableUtil.java
@@ -30,6 +30,8 @@ package com.jogamp.opengl.util;
 import javax.media.nativewindow.AbstractGraphicsDevice;
 import javax.media.opengl.GLAnimatorControl;
 import javax.media.opengl.GLAutoDrawable;
+import javax.media.opengl.GLBase;
+import javax.media.opengl.GLCapabilitiesImmutable;
 import javax.media.opengl.GLContext;
 import javax.media.opengl.GLDrawable;
 import javax.media.opengl.GLEventListener;
@@ -168,4 +170,23 @@ public class GLDrawableUtil {
     if(bIsPaused) { bAnim.resume(); }
   }
 
+  /**
+   * Determines whether the chosen {@link GLCapabilitiesImmutable}
+   * requires a {@link GLDrawable#swapBuffers() swap-buffers}
+   * before reading pixels.
+   * <p>
+   * Usually one uses the {@link GLBase#getDefaultReadBuffer() default-read-buffer}
+   * in which case {@link GLDrawable#swapBuffers() swap-buffers} shall happen <b>after</b> calling reading pixels, the default.
+   * </p>
+   * <p>
+   * However, <i>multisampling</i> offscreen {@link javax.media.opengl.GLFBODrawable}s
+   * utilize {@link GLDrawable#swapBuffers() swap-buffers} to <i>downsample</i>
+   * the multisamples into the readable sampling sink.
+   * In this case, we require {@link GLDrawable#swapBuffers() swap-buffers} <b>before</b> reading pixels.
+   * </p>
+   * @return chosenCaps.isFBO() && chosenCaps.getSampleBuffers()
+   */
+  public static final boolean swapBuffersBeforeRead(final GLCapabilitiesImmutable chosenCaps) {
+      return chosenCaps.isFBO() && chosenCaps.getSampleBuffers();
+  }
 }
diff --git a/src/jogl/classes/com/jogamp/opengl/util/TileRendererBase.java b/src/jogl/classes/com/jogamp/opengl/util/TileRendererBase.java
index 22f5c017c..dabde83dd 100644
--- a/src/jogl/classes/com/jogamp/opengl/util/TileRendererBase.java
+++ b/src/jogl/classes/com/jogamp/opengl/util/TileRendererBase.java
@@ -412,22 +412,11 @@ public abstract class TileRendererBase {
      * requires a <i>pre-{@link GLDrawable#swapBuffers() swap-buffers}</i>
      * before accessing the results, i.e. before {@link #endTile(GL)}.
      * <p>
-     * Usually one uses the {@link GL#getDefaultReadBuffer() default-read-buffer}, i.e.
-     * {@link GL#GL_FRONT} for single-buffer and {@link GL#GL_BACK} for double-buffer {@link GLDrawable}s
-     * and {@link GL#GL_COLOR_ATTACHMENT0} for offscreen framebuffer objects.<br>
-     * Here {@link GLDrawable#swapBuffers() swap-buffers} shall happen <b>after</b> calling {@link #endTile(GL)}, the default.
+     * See {@link GLDrawableUtil#swapBuffersBeforeRead(GLCapabilitiesImmutable)}.
      * </p>
-     * <p>
-     * However, <i>multisampling</i> offscreen {@link GLFBODrawable}s
-     * utilize {@link GLDrawable#swapBuffers() swap-buffers} to <i>downsample</i>
-     * the multisamples into the readable sampling sink.
-     * In this case, we require a {@link GLDrawable#swapBuffers() swap-buffers} <b>before</b> calling {@link #endTile(GL)}.
-     * </p>
-     * @param chosenCaps the chosen {@link GLCapabilitiesImmutable}
-     * @return chosenCaps.isFBO() && chosenCaps.getSampleBuffers()
      */
     public final boolean reqPreSwapBuffers(GLCapabilitiesImmutable chosenCaps) {
-        return chosenCaps.isFBO() && chosenCaps.getSampleBuffers();
+        return GLDrawableUtil.swapBuffersBeforeRead(chosenCaps);
     }
 
     /**