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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 .
+ */
+
+#pragma once
+
+#include "canvashelper.hxx"
+
+#include <vcl/bitmapex.hxx>
+
+#include "bitmapbackbuffer.hxx"
+
+
+namespace vclcanvas
+{
+ /** Helper class for basic canvasbitmap functionality. Extends
+ CanvasHelper with some CanvasBitmap specialities, such as alpha
+ support.
+
+ Note that a plain CanvasHelper, although it does support the
+ XBitmap interface, has no provision for alpha channel on VCL
+ (at least no efficient one. If the alpha VDev one day gets
+ part of SAL, we might change that).
+ */
+ class CanvasBitmapHelper : public CanvasHelper
+ {
+ public:
+ CanvasBitmapHelper();
+
+ /** Set a new bitmap on this helper.
+
+ This method late-initializes the bitmap canvas helper,
+ providing it with the necessary device and output
+ objects. The internally stored bitmap representation is
+ updated from the given bitmap, including any size
+ changes. Note that the CanvasHelper does <em>not</em> take
+ ownership of the SpriteCanvas object, nor does it perform
+ any reference counting. Thus, to prevent reference counted
+ objects from deletion, the user of this class is
+ responsible for holding ref-counted references to those
+ objects!
+
+ @param rBitmap
+ Content of this bitmap is used as our new content (our
+ internal size is adapted to the size of the bitmap given)
+
+ @param rDevice
+ Reference device for this canvas bitmap
+
+ @param rOutDevProvider
+ Reference output device. Used to create matching bitmap.
+ */
+ void init( const BitmapEx& rBitmap,
+ css::rendering::XGraphicDevice& rDevice,
+ const OutDevProviderSharedPtr& rOutDevProvider );
+
+
+ // Overridden CanvasHelper functionality
+ // =====================================
+
+ void disposing();
+
+ void clear();
+
+ css::geometry::IntegerSize2D getSize() const;
+
+ 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;
+
+ /// @internal
+ BitmapEx getBitmap() const;
+
+ private:
+
+ BitmapBackBufferSharedPtr mpBackBuffer;
+ OutDevProviderSharedPtr mpOutDevReference;
+ };
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */