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diff --git a/canvas/source/opengl/ogl_bitmapcanvashelper.hxx b/canvas/source/opengl/ogl_bitmapcanvashelper.hxx
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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/.
+ */
+
+#pragma once
+
+#include <com/sun/star/geometry/IntegerPoint2D.hpp>
+#include <com/sun/star/geometry/IntegerRectangle2D.hpp>
+#include <com/sun/star/rendering/IntegerBitmapLayout.hpp>
+
+#include "ogl_canvashelper.hxx"
+
+namespace oglcanvas
+{
+ /** Helper class for basic canvas functionality. */
+ class BitmapCanvasHelper : public CanvasHelper
+ {
+ public:
+ BitmapCanvasHelper();
+
+ /// Release all references
+ void disposing();
+
+ /** Initialize canvas helper
+
+ This method late-initializes the canvas helper, providing
+ it with the necessary device and output objects. Note that
+ the CanvasHelper does <em>not</em> take ownership of the
+ passed rDevice reference, nor does it perform any
+ reference counting. Thus, to prevent the reference counted
+ SpriteCanvas object from deletion, the user of this class
+ is responsible for holding ref-counted references itself!
+
+ @param rDevice
+ Reference device this canvas is associated with
+
+ */
+ void init( css::rendering::XGraphicDevice& rDevice,
+ SpriteDeviceHelper& rDeviceHelper,
+ const css::geometry::IntegerSize2D& rSize );
+
+ // BitmapCanvasHelper functionality
+ // ================================
+
+ const css::geometry::IntegerSize2D& getSize() const { return maSize; }
+
+ css::uno::Reference< css::rendering::XBitmap >
+ getScaledBitmap( const css::geometry::RealSize2D& newSize,
+ bool beFast );
+
+ css::uno::Sequence< sal_Int8 >
+ getData( css::rendering::IntegerBitmapLayout& bitmapLayout,
+ const css::geometry::IntegerRectangle2D& rect );
+
+ css::uno::Sequence< sal_Int8 >
+ getPixel( css::rendering::IntegerBitmapLayout& bitmapLayout,
+ const css::geometry::IntegerPoint2D& pos );
+
+ css::rendering::IntegerBitmapLayout getMemoryLayout() const;
+
+ private:
+ css::geometry::IntegerSize2D maSize;
+ };
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */