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diff --git a/vcl/inc/salgdiimpl.hxx b/vcl/inc/salgdiimpl.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/.
+ *
+ * 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 INCLUDED_VCL_INC_SALGDIIMPL_HXX
+#define INCLUDED_VCL_INC_SALGDIIMPL_HXX
+
+#include <vcl/dllapi.h>
+
+#include <tools/color.hxx>
+#include <tools/poly.hxx>
+
+#include <vcl/salgtype.hxx>
+#include <vcl/region.hxx>
+#include <vcl/vclenum.hxx>
+
+#include <com/sun/star/drawing/LineCap.hpp>
+
+class SalGraphics;
+class SalBitmap;
+class SalFrame;
+class Gradient;
+class OpenGLContext;
+class SalVirtualDevice;
+
+class VCL_PLUGIN_PUBLIC SalGraphicsImpl
+{
+public:
+
+    virtual ~SalGraphicsImpl();
+
+    virtual void Init() = 0;
+
+    virtual void DeInit() {}
+
+    virtual void freeResources() = 0;
+
+    virtual OUString getRenderBackendName() const = 0;
+
+    virtual bool setClipRegion( const vcl::Region& ) = 0;
+    //
+    // get the depth of the device
+    virtual sal_uInt16 GetBitCount() const = 0;
+
+    // get the width of the device
+    virtual long GetGraphicsWidth() const = 0;
+
+    // set the clip region to empty
+    virtual void ResetClipRegion() = 0;
+
+    // set the line color to transparent (= don't draw lines)
+
+    virtual void SetLineColor() = 0;
+
+    // set the line color to a specific color
+    virtual void SetLineColor( Color nColor ) = 0;
+
+    // set the fill color to transparent (= don't fill)
+    virtual void SetFillColor() = 0;
+
+    // set the fill color to a specific color, shapes will be
+    // filled accordingly
+    virtual void SetFillColor( Color nColor ) = 0;
+
+    // enable/disable XOR drawing
+    virtual void SetXORMode( bool bSet, bool bInvertOnly ) = 0;
+
+    // set line color for raster operations
+    virtual void SetROPLineColor( SalROPColor nROPColor ) = 0;
+
+    // set fill color for raster operations
+    virtual void SetROPFillColor( SalROPColor nROPColor ) = 0;
+
+    // draw --> LineColor and FillColor and RasterOp and ClipRegion
+    virtual void drawPixel( long nX, long nY ) = 0;
+    virtual void drawPixel( long nX, long nY, Color nColor ) = 0;
+
+    virtual void drawLine( long nX1, long nY1, long nX2, long nY2 ) = 0;
+
+    virtual void drawRect( long nX, long nY, long nWidth, long nHeight ) = 0;
+
+    virtual void drawPolyLine( sal_uInt32 nPoints, const SalPoint* pPtAry ) = 0;
+
+    virtual void drawPolygon( sal_uInt32 nPoints, const SalPoint* pPtAry ) = 0;
+
+    virtual void drawPolyPolygon( sal_uInt32 nPoly, const sal_uInt32* pPoints, PCONSTSALPOINT* pPtAry ) = 0;
+
+    virtual bool drawPolyPolygon(
+        const basegfx::B2DHomMatrix& rObjectToDevice,
+        const basegfx::B2DPolyPolygon&,
+        double fTransparency) = 0;
+
+    virtual bool drawPolyLine(
+                const basegfx::B2DHomMatrix& rObjectToDevice,
+                const basegfx::B2DPolygon&,
+                double fTransparency,
+                double fLineWidth,
+                const std::vector< double >* pStroke, // MM01
+                basegfx::B2DLineJoin,
+                css::drawing::LineCap,
+                double fMiterMinimumAngle,
+                bool bPixelSnapHairline) = 0;
+
+    virtual bool drawPolyLineBezier(
+                sal_uInt32 nPoints,
+                const SalPoint* pPtAry,
+                const PolyFlags* pFlgAry ) = 0;
+
+    virtual bool drawPolygonBezier(
+                sal_uInt32 nPoints,
+                const SalPoint* pPtAry,
+                const PolyFlags* pFlgAry ) = 0;
+
+    virtual bool drawPolyPolygonBezier(
+                sal_uInt32 nPoly,
+                const sal_uInt32* pPoints,
+                const SalPoint* const* pPtAry,
+                const PolyFlags* const* pFlgAry ) = 0;
+
+    // CopyArea --> No RasterOp, but ClipRegion
+    virtual void copyArea(
+                long nDestX, long nDestY,
+                long nSrcX, long nSrcY,
+                long nSrcWidth, long nSrcHeight,
+                bool bWindowInvalidate ) = 0;
+
+    // CopyBits and DrawBitmap --> RasterOp and ClipRegion
+    // CopyBits() --> pSrcGraphics == NULL, then CopyBits on same Graphics
+    virtual void copyBits( const SalTwoRect& rPosAry, SalGraphics* pSrcGraphics ) = 0;
+
+    virtual void drawBitmap( const SalTwoRect& rPosAry, const SalBitmap& rSalBitmap ) = 0;
+
+    virtual void drawBitmap(
+                const SalTwoRect& rPosAry,
+                const SalBitmap& rSalBitmap,
+                const SalBitmap& rMaskBitmap ) = 0;
+
+    virtual void drawMask(
+                const SalTwoRect& rPosAry,
+                const SalBitmap& rSalBitmap,
+                Color nMaskColor ) = 0;
+
+    virtual std::shared_ptr<SalBitmap> getBitmap( long nX, long nY, long nWidth, long nHeight ) = 0;
+
+    virtual Color getPixel( long nX, long nY ) = 0;
+
+    // invert --> ClipRegion (only Windows or VirDevs)
+    virtual void invert(
+                long nX, long nY,
+                long nWidth, long nHeight,
+                SalInvert nFlags) = 0;
+
+    virtual void invert( sal_uInt32 nPoints, const SalPoint* pPtAry, SalInvert nFlags ) = 0;
+
+    virtual bool drawEPS(
+                long nX, long nY,
+                long nWidth, long nHeight,
+                void* pPtr,
+                sal_uInt32 nSize ) = 0;
+
+    virtual bool blendBitmap(
+                const SalTwoRect&,
+                const SalBitmap& rBitmap ) = 0;
+
+    virtual bool blendAlphaBitmap(
+                const SalTwoRect&,
+                const SalBitmap& rSrcBitmap,
+                const SalBitmap& rMaskBitmap,
+                const SalBitmap& rAlphaBitmap ) = 0;
+
+    virtual bool drawAlphaBitmap(
+                const SalTwoRect&,
+                const SalBitmap& rSourceBitmap,
+                const SalBitmap& rAlphaBitmap ) = 0;
+
+    /** draw transformed bitmap (maybe with alpha) where Null, X, Y define the coordinate system */
+    virtual bool drawTransformedBitmap(
+                const basegfx::B2DPoint& rNull,
+                const basegfx::B2DPoint& rX,
+                const basegfx::B2DPoint& rY,
+                const SalBitmap& rSourceBitmap,
+                const SalBitmap* pAlphaBitmap) = 0;
+
+    virtual bool drawAlphaRect(
+                    long nX, long nY,
+                    long nWidth, long nHeight,
+                    sal_uInt8 nTransparency ) = 0;
+
+    virtual bool drawGradient(const tools::PolyPolygon& rPolygon, const Gradient& rGradient) = 0;
+
+    virtual bool supportsOperation(OutDevSupportType eType) const = 0;
+};
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */