Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 962 insertions, 0 deletions

diff --git a/vcl/inc/salgdi.hxx b/vcl/inc/salgdi.hxx
new file mode 100644
index 000000000..8679d4a0a
--- /dev/null
+++ b/vcl/inc/salgdi.hxx
@@ -0,0 +1,962 @@
+/* -*- 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 <sal/config.h>
+
+#include <vcl/outdev.hxx>
+
+#include "impfontmetricdata.hxx"
+#include "salgdiimpl.hxx"
+#include "sallayout.hxx"
+#include "SalGradient.hxx"
+#include <basegfx/matrix/b2dhommatrix.hxx>
+#include "WidgetDrawInterface.hxx"
+
+#include <config_cairo_canvas.h>
+
+#include <map>
+#include <vector>
+
+class SalBitmap;
+class FontAttributes;
+namespace vcl::font {
+    class FontSelectPattern;
+    class PhysicalFontFace;
+    class PhysicalFontCollection;
+}
+class SalLayout;
+namespace tools { class Rectangle; }
+class FontSubsetInfo;
+class OutputDevice;
+class FreetypeFont;
+struct SystemGraphicsData;
+
+namespace basegfx {
+    class B2DVector;
+    class B2DPolygon;
+    class B2DPolyPolygon;
+}
+
+namespace vcl
+{
+class AbstractTrueTypeFont;
+class FileDefinitionWidgetDraw;
+typedef struct TTGlobalFontInfo_ TTGlobalFontInfo;
+}
+
+typedef sal_Unicode sal_Ucs; // TODO: use sal_UCS4 instead of sal_Unicode
+typedef std::map< sal_Ucs, sal_uInt32 >   Ucs2UIntMap;
+
+// note: if you add any new methods to class SalGraphics using coordinates
+//       make sure they have a corresponding protected pure virtual method
+//       which has to be implemented by the platform dependent part.
+//       Add a method that performs coordinate mirroring if required, (see
+//       existing methods as sample) and then calls the equivalent pure method.
+
+// note: all positions are in pixel and relative to
+// the top/left-position of the virtual output area
+
+class VCL_PLUGIN_PUBLIC SalGraphics : protected vcl::WidgetDrawInterface
+{
+public:
+    SalGraphics();
+    ~SalGraphics() COVERITY_NOEXCEPT_FALSE override;
+
+    virtual SalGraphicsImpl*    GetImpl() const = 0;
+
+    void                        setAntiAlias(bool bNew)
+    {
+        m_bAntiAlias = bNew;
+
+        // Temporary store in both
+        if (GetImpl())
+            GetImpl()->setAntiAlias(bNew);
+    }
+
+    bool                        getAntiAlias() const
+    {
+        return m_bAntiAlias;
+    }
+
+    void setTextRenderModeForResolutionIndependentLayout(bool bNew)
+    {
+        m_bTextRenderModeForResolutionIndependentLayout = bNew;
+    }
+
+    bool getTextRenderModeForResolutionIndependentLayoutEnabled() const
+    {
+        return m_bTextRenderModeForResolutionIndependentLayout;
+    }
+
+    // public SalGraphics methods, the interface to the independent vcl part
+
+    // get device resolution
+    virtual void                GetResolution( sal_Int32& rDPIX, sal_Int32& rDPIY ) = 0;
+
+    // get the depth of the device
+    virtual sal_uInt16          GetBitCount() const = 0;
+
+    // get the width of the device
+    virtual tools::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;
+
+    // set the text color to a specific color
+    virtual void                SetTextColor( Color nColor ) = 0;
+
+    // set the font
+    virtual void                SetFont(LogicalFontInstance*, int nFallbackLevel) = 0;
+
+    // release the fonts
+    void                        ReleaseFonts() { SetFont( nullptr, 0 ); }
+
+    // get the current font's metrics
+    virtual void                GetFontMetric( ImplFontMetricDataRef&, int nFallbackLevel ) = 0;
+
+    // get the repertoire of the current font
+    virtual FontCharMapRef      GetFontCharMap() const = 0;
+
+    // get the layout capabilities of the current font
+    virtual bool                GetFontCapabilities(vcl::FontCapabilities &rFontCapabilities) const = 0;
+
+    // graphics must fill supplied font list
+    virtual void                GetDevFontList( vcl::font::PhysicalFontCollection* ) = 0;
+
+    // graphics must drop any cached font info
+    virtual void                ClearDevFontCache() = 0;
+
+    virtual bool                AddTempDevFont(
+                                    vcl::font::PhysicalFontCollection*,
+                                    const OUString& rFileURL,
+                                    const OUString& rFontName ) = 0;
+
+    // CreateFontSubset: a method to get a subset of glyhps of a font
+    // inside a new valid font file
+    // returns true if creation of subset was successful
+    // parameters: rToFile: contains an osl file URL to write the subset to
+    //             pFont: describes from which font to create a subset
+    //             pGlyphIDs: the glyph ids to be extracted
+    //             pEncoding: the character code corresponding to each glyph
+    //             pWidths: the advance widths of the corresponding glyphs (in PS font units)
+    //             nGlyphs: the number of glyphs
+    //             rInfo: additional outgoing information
+    // implementation note: encoding 0 with glyph id 0 should be added implicitly
+    // as "undefined character"
+    virtual bool                CreateFontSubset(
+                                    const OUString& rToFile,
+                                    const vcl::font::PhysicalFontFace* pFont,
+                                    const sal_GlyphId* pGlyphIDs,
+                                    const sal_uInt8* pEncoding,
+                                    sal_Int32* pWidths,
+                                    int nGlyphs,
+                                    FontSubsetInfo& rInfo ) = 0;
+
+    // GetEmbedFontData: gets the font data for a font marked
+    // embeddable by GetDevFontList or NULL in case of error
+    // parameters: pFont: describes the font in question
+    //             pDataLen: out parameter, contains the byte length of the returned buffer
+    virtual const void*         GetEmbedFontData(const vcl::font::PhysicalFontFace* pFont, tools::Long* pDataLen) = 0;
+
+    // free the font data again
+    virtual void                FreeEmbedFontData( const void* pData, tools::Long nDataLen ) = 0;
+
+    // get the same widths as in CreateFontSubset
+    // in case of an embeddable font also fill the mapping
+    // between unicode and glyph id
+    // leave widths vector and mapping untouched in case of failure
+    virtual void                GetGlyphWidths(
+                                    const vcl::font::PhysicalFontFace* pFont,
+                                    bool bVertical,
+                                    std::vector< sal_Int32 >& rWidths,
+                                    Ucs2UIntMap& rUnicodeEnc ) = 0;
+
+    virtual std::unique_ptr<GenericSalLayout>
+                                GetTextLayout(int nFallbackLevel) = 0;
+    virtual void                DrawTextLayout( const GenericSalLayout& ) = 0;
+
+    virtual bool                supportsOperation( OutDevSupportType ) const = 0;
+
+    // mirroring specifics
+    SalLayoutFlags              GetLayout() const { return m_nLayout; }
+    void                        SetLayout( SalLayoutFlags aLayout ) { m_nLayout = aLayout;}
+
+    void                        mirror( tools::Long& nX, const OutputDevice& rOutDev ) const;
+    // only called mirror2 to avoid ambiguity
+    [[nodiscard]] tools::Long   mirror2( tools::Long nX, const OutputDevice& rOutDev ) const;
+    void                        mirror( tools::Long& nX, tools::Long nWidth, const OutputDevice& rOutDev, bool bBack = false ) const;
+    bool                        mirror( sal_uInt32 nPoints, const Point *pPtAry, Point *pPtAry2, const OutputDevice& rOutDev ) const;
+    void                        mirror( tools::Rectangle& rRect, const OutputDevice&, bool bBack = false ) const;
+    void                        mirror( vcl::Region& rRgn, const OutputDevice& rOutDev ) const;
+    void                        mirror( ImplControlValue&, const OutputDevice& ) const;
+    basegfx::B2DPolyPolygon     mirror( const basegfx::B2DPolyPolygon& i_rPoly, const OutputDevice& rOutDev ) const;
+    const basegfx::B2DHomMatrix& getMirror( const OutputDevice& rOutDev ) const;
+
+    // non virtual methods; these do possible coordinate mirroring and
+    // then delegate to protected virtual methods
+    bool                        SetClipRegion( const vcl::Region&, const OutputDevice& rOutDev );
+
+    // draw --> LineColor and FillColor and RasterOp and ClipRegion
+    void                        DrawPixel( tools::Long nX, tools::Long nY, const OutputDevice& rOutDev );
+    void                        DrawPixel( tools::Long nX, tools::Long nY, Color nColor, const OutputDevice& rOutDev );
+
+    void                        DrawLine( tools::Long nX1, tools::Long nY1, tools::Long nX2, tools::Long nY2, const OutputDevice& rOutDev );
+
+    void                        DrawRect( tools::Long nX, tools::Long nY, tools::Long nWidth, tools::Long nHeight, const OutputDevice& rOutDev );
+
+    void                        DrawPolyLine( sal_uInt32 nPoints, Point const * pPtAry, const OutputDevice& rOutDev );
+
+    void                        DrawPolygon( sal_uInt32 nPoints, const Point* pPtAry, const OutputDevice& rOutDev );
+
+    void                        DrawPolyPolygon(
+                                    sal_uInt32 nPoly,
+                                    const sal_uInt32* pPoints,
+                                    const Point** pPtAry,
+                                    const OutputDevice& rOutDev );
+
+    bool                        DrawPolyPolygon(
+                                    const basegfx::B2DHomMatrix& rObjectToDevice,
+                                    const basegfx::B2DPolyPolygon &i_rPolyPolygon,
+                                    double i_fTransparency,
+                                    const OutputDevice& i_rOutDev);
+
+    bool                        DrawPolyLine(
+                                    const basegfx::B2DHomMatrix& rObjectToDevice,
+                                    const basegfx::B2DPolygon& i_rPolygon,
+                                    double i_fTransparency,
+                                    double i_fLineWidth,
+                                    const std::vector< double >* i_pStroke, // MM01
+                                    basegfx::B2DLineJoin i_eLineJoin,
+                                    css::drawing::LineCap i_eLineCap,
+                                    double i_fMiterMinimumAngle,
+                                    bool bPixelSnapHairline,
+                                    const OutputDevice& i_rOutDev);
+
+    bool                        DrawPolyLineBezier(
+                                    sal_uInt32 nPoints,
+                                    const Point* pPtAry,
+                                    const PolyFlags* pFlgAry,
+                                    const OutputDevice& rOutDev );
+
+    bool                        DrawPolygonBezier(
+                                    sal_uInt32 nPoints,
+                                    const Point* pPtAry,
+                                    const PolyFlags* pFlgAry,
+                                    const OutputDevice& rOutDev );
+
+    bool                        DrawPolyPolygonBezier(
+                                    sal_uInt32 nPoly,
+                                    const sal_uInt32* pPoints,
+                                    const Point* const* pPtAry,
+                                    const PolyFlags* const* pFlgAry,
+                                    const OutputDevice& rOutDev );
+
+    bool                        DrawGradient(
+                                    const tools::PolyPolygon& rPolyPoly,
+                                    const Gradient& rGradient,
+                                    const OutputDevice& rOutDev);
+
+    // CopyArea --> No RasterOp, but ClipRegion
+    void                        CopyArea(
+                                    tools::Long nDestX, tools::Long nDestY,
+                                    tools::Long nSrcX, tools::Long nSrcY,
+                                    tools::Long nSrcWidth, tools::Long nSrcHeight,
+                                    const OutputDevice& rOutDev );
+
+    // CopyBits --> RasterOp and ClipRegion
+    // CopyBits() CopyBits on same Graphics
+    void                        CopyBits(
+                                    const SalTwoRect& rPosAry,
+                                    const OutputDevice& rOutDev);
+
+    // CopyBits --> RasterOp and ClipRegion
+    // CopyBits() CopyBits on different Graphics
+    void                        CopyBits(
+                                    const SalTwoRect& rPosAry,
+                                    SalGraphics& rSrcGraphics,
+                                    const OutputDevice& rOutDev,
+                                    const OutputDevice& rSrcOutDev );
+
+
+    void                        DrawBitmap(
+                                    const SalTwoRect& rPosAry,
+                                    const SalBitmap& rSalBitmap,
+                                    const OutputDevice& rOutDev );
+
+    void                        DrawBitmap(
+                                    const SalTwoRect& rPosAry,
+                                    const SalBitmap& rSalBitmap,
+                                    const SalBitmap& rTransparentBitmap,
+                                    const OutputDevice& rOutDev );
+
+    void                        DrawMask(
+                                    const SalTwoRect& rPosAry,
+                                    const SalBitmap& rSalBitmap,
+                                    Color nMaskColor,
+                                    const OutputDevice& rOutDev );
+
+    std::shared_ptr<SalBitmap>  GetBitmap(
+                                    tools::Long nX, tools::Long nY,
+                                    tools::Long nWidth, tools::Long nHeight,
+                                    const OutputDevice& rOutDev );
+
+    Color                       GetPixel(
+                                    tools::Long nX, tools::Long nY,
+                                    const OutputDevice& rOutDev );
+
+    // invert --> ClipRegion (only Windows)
+    void                        Invert(
+                                    tools::Long nX, tools::Long nY,
+                                    tools::Long nWidth, tools::Long nHeight,
+                                    SalInvert nFlags,
+                                    const OutputDevice& rOutDev );
+
+    void                        Invert(
+                                    sal_uInt32 nPoints,
+                                    const Point* pPtAry,
+                                    SalInvert nFlags,
+                                    const OutputDevice& rOutDev );
+
+    bool                        DrawEPS(
+                                    tools::Long nX, tools::Long nY,
+                                    tools::Long nWidth, tools::Long nHeight,
+                                    void* pPtr,
+                                    sal_uInt32 nSize,
+                                    const OutputDevice& rOutDev );
+
+    //  native widget rendering functions
+
+    /**
+     * @see WidgetDrawInterface::isNativeControlSupported
+     */
+    inline bool IsNativeControlSupported(ControlType, ControlPart);
+
+    /**
+     * @see WidgetDrawInterface::hitTestNativeControl
+     */
+    bool                        HitTestNativeScrollbar(
+                                    ControlPart nPart,
+                                    const tools::Rectangle& rControlRegion,
+                                    const Point& aPos,
+                                    bool& rIsInside,
+                                    const OutputDevice& rOutDev);
+
+    /**
+     * @see WidgetDrawInterface::drawNativeControl
+     */
+    bool                        DrawNativeControl(
+                                    ControlType nType,
+                                    ControlPart nPart,
+                                    const tools::Rectangle& rControlRegion,
+                                    ControlState nState,
+                                    const ImplControlValue& aValue,
+                                    const OUString& aCaption,
+                                    const OutputDevice& rOutDev,
+                                    const Color& rBackgroundColor = COL_AUTO );
+
+    /**
+     * @see WidgetDrawInterface::getNativeControlRegion
+     */
+    bool                        GetNativeControlRegion(
+                                    ControlType nType,
+                                    ControlPart nPart,
+                                    const tools::Rectangle& rControlRegion,
+                                    ControlState nState,
+                                    const ImplControlValue& aValue,
+                                    tools::Rectangle &rNativeBoundingRegion,
+                                    tools::Rectangle &rNativeContentRegion,
+                                    const OutputDevice& rOutDev );
+
+    /**
+     * @see WidgetDrawInterface::updateSettings
+     */
+    inline bool UpdateSettings(AllSettings&);
+
+    bool                        BlendBitmap(
+                                    const SalTwoRect& rPosAry,
+                                    const SalBitmap& rSalBitmap,
+                                    const OutputDevice& rOutDev );
+
+    bool                        BlendAlphaBitmap(
+                                    const SalTwoRect& rPosAry,
+                                    const SalBitmap& rSalSrcBitmap,
+                                    const SalBitmap& rSalMaskBitmap,
+                                    const SalBitmap& rSalAlphaBitmap,
+                                    const OutputDevice& rOutDev );
+
+    bool                        DrawAlphaBitmap(
+                                    const SalTwoRect&,
+                                    const SalBitmap& rSourceBitmap,
+                                    const SalBitmap& rAlphaBitmap,
+                                    const OutputDevice& rOutDev );
+
+    bool                        DrawTransformedBitmap(
+                                    const basegfx::B2DPoint& rNull,
+                                    const basegfx::B2DPoint& rX,
+                                    const basegfx::B2DPoint& rY,
+                                    const SalBitmap& rSourceBitmap,
+                                    const SalBitmap* pAlphaBitmap,
+                                    double fAlpha,
+                                    const OutputDevice& rOutDev );
+
+    bool                        HasFastDrawTransformedBitmap() const;
+
+    bool                        DrawAlphaRect(
+                                    tools::Long nX, tools::Long nY,
+                                    tools::Long nWidth, tools::Long nHeight,
+                                    sal_uInt8 nTransparency,
+                                    const OutputDevice& rOutDev );
+
+    virtual OUString getRenderBackendName() const;
+
+    virtual SystemGraphicsData  GetGraphicsData() const = 0;
+
+    // Backends like the svp/gtk ones use cairo and hidpi scale at the surface
+    // but bitmaps aren't hidpi, so if this returns true for the case that the
+    // surface is hidpi then pScaleOut contains the scaling factor. So we can
+    // create larger hires bitmaps which we know will be logically scaled down
+    // by this factor but physically just copied
+    virtual bool ShouldDownscaleIconsAtSurface(double* pScaleOut) const;
+
+
+#if ENABLE_CAIRO_CANVAS
+
+    /// Check whether cairo will work
+    virtual bool                SupportsCairo() const = 0;
+    /// Create Surface from given cairo surface
+    virtual cairo::SurfaceSharedPtr CreateSurface(const cairo::CairoSurfaceSharedPtr& rSurface) const = 0;
+    /// Create surface with given dimensions
+    virtual cairo::SurfaceSharedPtr CreateSurface(const OutputDevice& rRefDevice, int x, int y, int width, int height) const = 0;
+    /// Create Surface for given bitmap data
+    virtual cairo::SurfaceSharedPtr CreateBitmapSurface(const OutputDevice& rRefDevice, const BitmapSystemData& rData, const Size& rSize) const = 0;
+    virtual css::uno::Any       GetNativeSurfaceHandle(cairo::SurfaceSharedPtr& rSurface, const basegfx::B2ISize& rSize) const = 0;
+
+#endif // ENABLE_CAIRO_CANVAS
+
+protected:
+
+    friend class vcl::FileDefinitionWidgetDraw;
+
+    virtual bool                setClipRegion( const vcl::Region& ) = 0;
+
+    // draw --> LineColor and FillColor and RasterOp and ClipRegion
+    virtual void                drawPixel( tools::Long nX, tools::Long nY ) = 0;
+    virtual void                drawPixel( tools::Long nX, tools::Long nY, Color nColor ) = 0;
+
+    virtual void                drawLine( tools::Long nX1, tools::Long nY1, tools::Long nX2, tools::Long nY2 ) = 0;
+
+    virtual void                drawRect( tools::Long nX, tools::Long nY, tools::Long nWidth, tools::Long nHeight ) = 0;
+
+    virtual void                drawPolyLine( sal_uInt32 nPoints, const Point* pPtAry ) = 0;
+
+    virtual void                drawPolygon( sal_uInt32 nPoints, const Point* pPtAry ) = 0;
+
+    virtual void                drawPolyPolygon( sal_uInt32 nPoly, const sal_uInt32* pPoints, const Point** 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 Point* pPtAry,
+                                    const PolyFlags* pFlgAry ) = 0;
+
+    virtual bool                drawPolygonBezier(
+                                    sal_uInt32 nPoints,
+                                    const Point* pPtAry,
+                                    const PolyFlags* pFlgAry ) = 0;
+
+    virtual bool                drawPolyPolygonBezier(
+                                    sal_uInt32 nPoly,
+                                    const sal_uInt32* pPoints,
+                                    const Point* const* pPtAry,
+                                    const PolyFlags* const* pFlgAry ) = 0;
+
+    virtual bool                drawGradient(
+                                    const tools::PolyPolygon& rPolyPoly,
+                                    const Gradient& rGradient ) = 0;
+
+    virtual bool implDrawGradient(basegfx::B2DPolyPolygon const & /*rPolyPolygon*/,
+                                  SalGradient const & /*rGradient*/)
+    {
+        return false;
+    }
+
+    // CopyArea --> No RasterOp, but ClipRegion
+    virtual void                copyArea(
+                                    tools::Long nDestX, tools::Long nDestY,
+                                    tools::Long nSrcX, tools::Long nSrcY,
+                                    tools::Long nSrcWidth, tools::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( tools::Long nX, tools::Long nY, tools::Long nWidth, tools::Long nHeight ) = 0;
+
+    virtual Color               getPixel( tools::Long nX, tools::Long nY ) = 0;
+
+    // invert --> ClipRegion (only Windows or VirDevs)
+    virtual void                invert(
+                                    tools::Long nX, tools::Long nY,
+                                    tools::Long nWidth, tools::Long nHeight,
+                                    SalInvert nFlags) = 0;
+
+    virtual void                invert( sal_uInt32 nPoints, const Point* pPtAry, SalInvert nFlags ) = 0;
+
+    virtual bool                drawEPS(
+                                    tools::Long nX, tools::Long nY,
+                                    tools::Long nWidth, tools::Long nHeight,
+                                    void* pPtr,
+                                    sal_uInt32 nSize ) = 0;
+
+    /** Blend the bitmap with the current buffer */
+    virtual bool                blendBitmap(
+                                    const SalTwoRect&,
+                                    const SalBitmap& rBitmap ) = 0;
+
+    /** Draw the bitmap by blending using the mask and alpha channel */
+    virtual bool                blendAlphaBitmap(
+                                    const SalTwoRect&,
+                                    const SalBitmap& rSrcBitmap,
+                                    const SalBitmap& rMaskBitmap,
+                                    const SalBitmap& rAlphaBitmap ) = 0;
+
+    /** Render bitmap with alpha channel
+
+        @param rSourceBitmap
+        Source bitmap to blit
+
+        @param rAlphaBitmap
+        Alpha channel to use for blitting
+
+        @return true, if the operation succeeded, and false
+        otherwise. In this case, clients should try to emulate alpha
+        compositing themselves
+     */
+    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
+
+      @param fAlpha additional alpha (0 to 1) to apply while drawing
+    */
+    virtual bool                drawTransformedBitmap(
+                                    const basegfx::B2DPoint& rNull,
+                                    const basegfx::B2DPoint& rX,
+                                    const basegfx::B2DPoint& rY,
+                                    const SalBitmap& rSourceBitmap,
+                                    const SalBitmap* pAlphaBitmap,
+                                    double fAlpha) = 0;
+
+    /// Returns true if the drawTransformedBitmap() call is fast, and so it should
+    /// be used directly without trying to optimize some calls e.g. by calling drawBitmap()
+    /// instead (which is faster for most VCL backends). These optimizations are not
+    /// done unconditionally because they may be counter-productive for some fast VCL backends
+    /// (for example, some OutputDevice optimizations could try access the pixels, which
+    /// would make performance worse for GPU-backed backends).
+    /// See also tdf#138068.
+    virtual bool hasFastDrawTransformedBitmap() const = 0;
+
+    /** Render solid rectangle with given transparency
+     *
+     * @param nX             Top left coordinate of rectangle
+     * @param nY             Bottom right coordinate of rectangle
+     * @param nWidth         Width of rectangle
+     * @param nHeight        Height of rectangle
+     * @param nTransparency  Transparency value (0-255) to use. 0 blits and opaque, 255 a
+     *                       fully transparent rectangle
+     * @returns true if successfully drawn, false if not able to draw rectangle
+     */
+    virtual bool                drawAlphaRect(
+                                    tools::Long nX, tools::Long nY,
+                                    tools::Long nWidth, tools::Long nHeight,
+                                    sal_uInt8 nTransparency ) = 0;
+
+private:
+    SalLayoutFlags              m_nLayout; //< 0: mirroring off, 1: mirror x-axis
+
+    // for buffering the Mirror-Matrix, see ::getMirror
+    enum class MirrorMode
+    {
+        NONE,
+        Antiparallel,
+        AntiparallelBiDi,
+        BiDi
+    };
+    MirrorMode                  m_eLastMirrorMode;
+    tools::Long                 m_nLastMirrorTranslation;
+    basegfx::B2DHomMatrix       m_aLastMirror;
+
+    MirrorMode GetMirrorMode(const OutputDevice& rOutDev) const;
+
+protected:
+    /// flags which hold the SetAntialiasing() value from OutputDevice
+    bool                        m_bAntiAlias : 1;
+    bool                        m_bTextRenderModeForResolutionIndependentLayout : 1;
+
+    inline tools::Long GetDeviceWidth(const OutputDevice& rOutDev) const;
+
+    /**
+     * Handle damage done by drawing with a widget draw override
+     *
+     * If a m_pWidgetDraw is set and successfully draws using drawNativeControl,
+     * this function is called to handle the damage done to the graphics buffer.
+     *
+     * @param rDamagedRegion the region damaged by drawNativeControl.
+     **/
+    virtual inline void handleDamage(const tools::Rectangle& rDamagedRegion);
+
+    // native controls
+    bool initWidgetDrawBackends(bool bForce = false);
+
+    std::unique_ptr<vcl::WidgetDrawInterface> m_pWidgetDraw;
+    vcl::WidgetDrawInterface* forWidget() { return m_pWidgetDraw ? m_pWidgetDraw.get() : this; }
+
+    static void GetGlyphWidths(const vcl::AbstractTrueTypeFont& rTTF,
+                               const vcl::font::PhysicalFontFace& rFontFace, bool bVertical,
+                               std::vector<sal_Int32>& rWidths, Ucs2UIntMap& rUnicodeEnc);
+
+    static bool CreateTTFfontSubset(vcl::AbstractTrueTypeFont& aTTF, const OString& rSysPath,
+                                    const bool bVertical, const sal_GlyphId* pGlyphIds,
+                                    const sal_uInt8* pEncoding, sal_Int32* pGlyphWidths,
+                                    int nGlyphCount);
+
+    static bool CreateCFFfontSubset(const unsigned char* pFontBytes, int nByteLength,
+                                    const OString& rSysPath, const sal_GlyphId* pGlyphIds,
+                                    const sal_uInt8* pEncoding, sal_Int32* pGlyphWidths,
+                                    int nGlyphCount, FontSubsetInfo& rInfo);
+
+    static void FillFontSubsetInfo(const vcl::TTGlobalFontInfo& rTTInfo, const OUString& pPSName,
+                                   FontSubsetInfo& rInfo);
+};
+
+bool SalGraphics::IsNativeControlSupported(ControlType eType, ControlPart ePart)
+{
+    return forWidget()->isNativeControlSupported(eType, ePart);
+}
+
+bool SalGraphics::UpdateSettings(AllSettings& rSettings)
+{
+    return forWidget()->updateSettings(rSettings);
+}
+
+void SalGraphics::handleDamage(const tools::Rectangle&) {}
+
+
+class VCL_DLLPUBLIC SalGraphicsAutoDelegateToImpl : public SalGraphics
+{
+public:
+    sal_uInt16 GetBitCount() const override
+    {
+        return GetImpl()->GetBitCount();
+    }
+
+    tools::Long GetGraphicsWidth() const override
+    {
+        return GetImpl()->GetGraphicsWidth();
+    }
+
+    void ResetClipRegion() override
+    {
+        GetImpl()->ResetClipRegion();
+    }
+
+    bool setClipRegion( const vcl::Region& i_rClip ) override
+    {
+        return GetImpl()->setClipRegion(i_rClip);
+    }
+
+    void SetLineColor() override
+    {
+        GetImpl()->SetLineColor();
+    }
+
+    void SetLineColor( Color nColor ) override
+    {
+        GetImpl()->SetLineColor(nColor);
+    }
+
+    void SetFillColor() override
+    {
+        GetImpl()->SetFillColor();
+    }
+
+    void SetFillColor( Color nColor ) override
+    {
+        GetImpl()->SetFillColor (nColor);
+    }
+
+    void SetROPLineColor(SalROPColor aColor) override
+    {
+        GetImpl()->SetROPLineColor(aColor);
+    }
+
+    void SetROPFillColor( SalROPColor aColor) override
+    {
+        GetImpl()->SetROPFillColor(aColor);
+    }
+
+    void SetXORMode(bool bSet, bool bInvertOnly) override
+    {
+        GetImpl()->SetXORMode(bSet, bInvertOnly);
+    }
+
+    void drawPixel( tools::Long nX, tools::Long nY ) override
+    {
+        GetImpl()->drawPixel(nX, nY);
+    }
+
+    void drawPixel( tools::Long nX, tools::Long nY, Color nColor ) override
+    {
+        GetImpl()->drawPixel(nX, nY, nColor);
+    }
+
+    void drawLine( tools::Long nX1, tools::Long nY1, tools::Long nX2, tools::Long nY2 ) override
+    {
+        GetImpl()->drawLine(nX1, nY1, nX2, nY2);
+    }
+
+    void drawRect( tools::Long nX, tools::Long nY, tools::Long nDX, tools::Long nDY ) override
+    {
+        GetImpl()->drawRect(nX, nY, nDX, nDY);
+    }
+
+    void drawPolyLine( sal_uInt32 nPoints, const Point *pPtAry ) override
+    {
+        GetImpl()->drawPolyLine(nPoints, pPtAry);
+    }
+
+    void drawPolygon( sal_uInt32 nPoints, const Point* pPtAry ) override
+    {
+        GetImpl()->drawPolygon(nPoints, pPtAry);
+    }
+
+    void drawPolyPolygon(sal_uInt32 nPoly, const sal_uInt32* pPoints, const Point** pPtAry) override
+    {
+        GetImpl()->drawPolyPolygon (nPoly, pPoints, pPtAry);
+    }
+
+    bool drawPolyPolygon(
+        const basegfx::B2DHomMatrix& rObjectToDevice,
+        const basegfx::B2DPolyPolygon& rPolyPolygon,
+        double fTransparency) override
+    {
+        return GetImpl()->drawPolyPolygon(rObjectToDevice, rPolyPolygon, fTransparency);
+    }
+
+    bool drawPolyLine(
+        const basegfx::B2DHomMatrix& rObjectToDevice,
+        const basegfx::B2DPolygon& rPolygon,
+        double fTransparency,
+        double fLineWidth,
+        const std::vector< double >* pStroke,
+        basegfx::B2DLineJoin eJoin,
+        css::drawing::LineCap eLineCap,
+        double fMiterMinimumAngle,
+        bool bPixelSnapHairline) override
+    {
+        return GetImpl()->drawPolyLine(rObjectToDevice, rPolygon, fTransparency, fLineWidth, pStroke, eJoin, eLineCap, fMiterMinimumAngle, bPixelSnapHairline);
+    }
+
+    bool drawPolyLineBezier( sal_uInt32 nPoints, const Point* pPtAry, const PolyFlags* pFlgAry ) override
+    {
+        return GetImpl()->drawPolyLineBezier(nPoints, pPtAry, pFlgAry);
+    }
+
+    bool drawPolygonBezier( sal_uInt32 nPoints, const Point* pPtAry, const PolyFlags* pFlgAry ) override
+    {
+        return GetImpl()->drawPolygonBezier(nPoints, pPtAry, pFlgAry);
+    }
+
+    bool drawPolyPolygonBezier( sal_uInt32 nPoly,
+                                                 const sal_uInt32* pPoints,
+                                                 const Point* const* pPtAry,
+                                                 const PolyFlags* const* pFlgAry) override
+    {
+        return GetImpl()->drawPolyPolygonBezier(nPoly, pPoints, pPtAry, pFlgAry);
+    }
+
+    void invert(tools::Long nX, tools::Long nY, tools::Long nWidth, tools::Long nHeight,
+                                        SalInvert nFlags) override
+    {
+       GetImpl()->invert(nX, nY, nWidth, nHeight, nFlags);
+    }
+
+    void invert(sal_uInt32 nPoints, const Point* pPtAry, SalInvert nFlags) override
+    {
+       GetImpl()->invert(nPoints, pPtAry, nFlags);
+    }
+
+    bool drawEPS(tools::Long nX, tools::Long nY, tools::Long nWidth,
+                                   tools::Long nHeight, void* pPtr, sal_uInt32 nSize) override
+    {
+        return GetImpl()->drawEPS(nX, nY, nWidth, nHeight, pPtr, nSize);
+    }
+
+    void copyBits(const SalTwoRect& rPosAry, SalGraphics* pSrcGraphics) override
+    {
+        GetImpl()->copyBits(rPosAry, pSrcGraphics);
+    }
+
+    void copyArea (tools::Long nDestX, tools::Long nDestY, tools::Long nSrcX,
+                                    tools::Long nSrcY, tools::Long nSrcWidth, tools::Long nSrcHeight,
+                                    bool bWindowInvalidate) override
+    {
+        GetImpl()->copyArea(nDestX, nDestY, nSrcX, nSrcY, nSrcWidth, nSrcHeight, bWindowInvalidate);
+    }
+
+    void drawBitmap(const SalTwoRect& rPosAry, const SalBitmap& rSalBitmap) override
+    {
+        GetImpl()->drawBitmap(rPosAry, rSalBitmap);
+    }
+
+    void drawBitmap(const SalTwoRect& rPosAry, const SalBitmap& rSalBitmap, const SalBitmap& rMaskBitmap) override
+    {
+        GetImpl()->drawBitmap(rPosAry, rSalBitmap, rMaskBitmap);
+    }
+
+    void drawMask(const SalTwoRect& rPosAry, const SalBitmap& rSalBitmap, Color nMaskColor) override
+    {
+        GetImpl()->drawMask(rPosAry, rSalBitmap, nMaskColor);
+    }
+
+    std::shared_ptr<SalBitmap> getBitmap(tools::Long nX, tools::Long nY, tools::Long nWidth, tools::Long nHeight) override
+    {
+        return GetImpl()->getBitmap(nX, nY, nWidth, nHeight);
+    }
+
+    Color getPixel(tools::Long nX, tools::Long nY) override
+    {
+        return GetImpl()->getPixel(nX, nY);
+    }
+
+    bool blendBitmap(const SalTwoRect& rPosAry, const SalBitmap& rBitmap) override
+    {
+        return GetImpl()->blendBitmap(rPosAry, rBitmap);
+    }
+
+    bool blendAlphaBitmap(const SalTwoRect& rPosAry, const SalBitmap& rSourceBitmap,
+                                          const SalBitmap& rMaskBitmap, const SalBitmap& rAlphaBitmap) override
+    {
+        return GetImpl()->blendAlphaBitmap(rPosAry, rSourceBitmap, rMaskBitmap, rAlphaBitmap);
+    }
+
+    bool drawAlphaBitmap(const SalTwoRect& rPosAry, const SalBitmap& rSourceBitmap,
+                                         const SalBitmap& rAlphaBitmap) override
+    {
+        return GetImpl()->drawAlphaBitmap(rPosAry, rSourceBitmap, rAlphaBitmap);
+    }
+
+    bool drawTransformedBitmap(const basegfx::B2DPoint& rNull,
+                                                 const basegfx::B2DPoint& rX,
+                                                 const basegfx::B2DPoint& rY,
+                                                 const SalBitmap& rSourceBitmap,
+                                                 const SalBitmap* pAlphaBitmap, double fAlpha) override
+    {
+        return GetImpl()->drawTransformedBitmap(rNull, rX, rY, rSourceBitmap, pAlphaBitmap, fAlpha);
+    }
+
+    bool hasFastDrawTransformedBitmap() const override
+    {
+        return GetImpl()->hasFastDrawTransformedBitmap();
+    }
+
+    bool drawAlphaRect(tools::Long nX, tools::Long nY, tools::Long nWidth,
+                                       tools::Long nHeight, sal_uInt8 nTransparency) override
+    {
+        return GetImpl()->drawAlphaRect(nX, nY, nWidth, nHeight, nTransparency);
+    }
+
+    bool drawGradient(const tools::PolyPolygon& rPolygon, const Gradient& rGradient) override
+    {
+        return GetImpl()->drawGradient(rPolygon, rGradient);
+    }
+
+    bool implDrawGradient(basegfx::B2DPolyPolygon const& rPolyPolygon,
+                                            SalGradient const& rGradient) override
+    {
+        return GetImpl()->implDrawGradient(rPolyPolygon, rGradient);
+    }
+
+    bool supportsOperation(OutDevSupportType eType) const override
+    {
+        return GetImpl()->supportsOperation(eType);
+    }
+
+    OUString getRenderBackendName() const override
+    {
+        return GetImpl()->getRenderBackendName();
+    }
+};
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */