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diff --git a/src/nativewindow/classes/javax/media/nativewindow/ScalableSurface.java b/src/nativewindow/classes/javax/media/nativewindow/ScalableSurface.java
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+++ b/src/nativewindow/classes/javax/media/nativewindow/ScalableSurface.java
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+/**
+ * Copyright 2014 JogAmp Community. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification, are
+ * permitted provided that the following conditions are met:
+ *
+ *    1. Redistributions of source code must retain the above copyright notice, this list of
+ *       conditions and the following disclaimer.
+ *
+ *    2. Redistributions in binary form must reproduce the above copyright notice, this list
+ *       of conditions and the following disclaimer in the documentation and/or other materials
+ *       provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * The views and conclusions contained in the software and documentation are those of the
+ * authors and should not be interpreted as representing official policies, either expressed
+ * or implied, of JogAmp Community.
+ */
+
+package javax.media.nativewindow;
+
+/**
+ * Adding mutable surface pixel scale property to implementing class, usually to a {@link NativeSurface} implementation,
+ * see {@link #setSurfaceScale(int[])}.
+ */
+public interface ScalableSurface {
+  /** Setting surface-pixel-scale of {@value}, results in same pixel- and window-units. */
+  public static final int IDENTITY_PIXELSCALE = 1;
+  /** Setting surface-pixel-scale of {@value}, results in maximum platform dependent pixel-scale, i.e. pixel-units >> window-units where available. */
+  public static final int AUTOMAX_PIXELSCALE = 0;
+
+  /**
+   * Request a pixel scale in x- and y-direction for the associated {@link NativeSurface}.
+   * <p>
+   * Default pixel scale request for both directions is {@link #AUTOMAX_PIXELSCALE}.
+   * </p>
+   * <p>
+   * In case platform only supports uniform pixel scale, i.e. one scale for both directions,
+   * either {@link #AUTOMAX_PIXELSCALE} or the maximum requested pixel scale component is used.
+   * </p>
+   * <p>
+   * The <i>requested</i> pixel scale will be validated against platform limits before native scale-setup,
+   * i.e. clipped to {@link #IDENTITY_PIXELSCALE} if not supported or the platform maximum.
+   * </p>
+   * <p>
+   * The actual <i>realized</i> pixel scale values of the {@link NativeSurface}
+   * can be queried via {@link #getSurfaceScale(int[])} or
+   * computed via <code>surface.{@link NativeSurface#convertToPixelUnits(int[]) convertToPixelUnits}(new int[] { 1, 1 })</code>
+   * </p>
+   *
+   * @param pixelScale <i>requested</i> surface pixel scale int[2] values for x- and y-direction.
+   */
+  public void setSurfaceScale(final int[] pixelScale);
+
+  /**
+   * Returns the pixel scale of the associated {@link NativeSurface}.
+   * <p>
+   * In case the {@link NativeSurface} is not yet realized, method returns the
+   * requested pixel scale as validated via {@link #setSurfaceScale(int[])}
+   * if called earlier or the implementation default, usually {@link #AUTOMAX_PIXELSCALE}.
+   * </p>
+   * <p>
+   * In case the {@link NativeSurface} is already realized, method returns the
+   * actual used pixel scale.
+   * </p>
+   * @param result int[2] storage for the result
+   * @return the passed storage for chaining
+   */
+  public int[] getSurfaceScale(final int[] result);
+}
+