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diff --git a/offapi/com/sun/star/rendering/XHalfFloatReadOnlyBitmap.idl b/offapi/com/sun/star/rendering/XHalfFloatReadOnlyBitmap.idl
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+++ b/offapi/com/sun/star/rendering/XHalfFloatReadOnlyBitmap.idl
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+#ifndef __com_sun_star_rendering_XHalfFloatReadOnlyBitmap_idl__
+#define __com_sun_star_rendering_XHalfFloatReadOnlyBitmap_idl__
+
+#include <com/sun/star/lang/IllegalArgumentException.idl>
+#include <com/sun/star/lang/IndexOutOfBoundsException.idl>
+#include <com/sun/star/rendering/FloatingPointBitmapLayout.idl>
+#include <com/sun/star/geometry/IntegerPoint2D.idl>
+#include <com/sun/star/geometry/IntegerRectangle2D.idl>
+#include <com/sun/star/rendering/XBitmap.idl>
+#include <com/sun/star/rendering/VolatileContentDestroyedException.idl>
+
+module com { module sun { module star { module rendering {
+
+/** Specialized interface for bitmaps containing half floats as their
+    color components. Half floats are 16 bit wide, and some high-end
+    GPUs already have them as supported frame buffer format. In
+    contrast to XHalfFloatBitmap, this interface only
+    permits read-only access.<p>
+
+    Use this interface for e.g. bitmaps that are calculated
+    on-the-fly, or that are pure functional, and thus cannot be
+    modified.<p>
+
+    If you get passed an instance of
+    XHalfFloatReadOnlyBitmap that also supports the
+    XVolatileBitmap interface, things become a bit more
+    complicated. When reading data, one has to check for both
+    VolatileContentDestroyedException and mismatching
+    FloatingPointBitmapLayout return values. If either of them
+    occurs, the whole bitmap read operation should be repeated.<p>
+ */
+interface XHalfFloatReadOnlyBitmap : XBitmap
+{
+    /** Query the raw data of this bitmap.<p>
+
+        Query the raw data of this bitmap, in the format as defined by
+        getMemoryLayout(). With the given rectangle, a subset of the
+        whole bitmap can be queried. When querying subsets of the
+        bitmap, the same scanline padding takes place as when the
+        whole bitmap is requested. Note: as we currently have no 16
+        bit float UNO data type, the values are transported as 16 bit
+        integers across the API (which requires casting on both
+        sides).<p>
+
+        @throws VolatileContentDestroyedException
+        if the bitmap is volatile, and the content has been destroyed by the system.
+     */
+    sequence<short>             getData( [in] ::com::sun::star::geometry::IntegerRectangle2D rect )
+        raises (com::sun::star::lang::IndexOutOfBoundsException,
+                VolatileContentDestroyedException);
+
+
+    /** Get a single pixel of the bitmap, returning its color
+        value.<p>
+
+        @throws VolatileContentDestroyedException
+        if the bitmap is volatile, and the content has been destroyed by the system.
+     */
+    sequence<short>             getPixel( [in] ::com::sun::star::geometry::IntegerPoint2D pos )
+        raises (com::sun::star::lang::IndexOutOfBoundsException,
+                VolatileContentDestroyedException);
+
+
+    /** Query the memory layout for this bitmap.<p>
+     */
+    FloatingPointBitmapLayout   getMemoryLayout();
+};
+
+}; }; }; };
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */