salgdi.hxx

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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 *
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#ifndef INCLUDED_VCL_INC_SALGDI_HXX
#define INCLUDED_VCL_INC_SALGDI_HXX

#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 PhysicalFontCollection;
class SalBitmap;
class FontSelectPattern;
class FontAttributes;
class PhysicalFontFace;
class SalLayout;
class ImplLayoutArgs;
namespace tools { class Rectangle; }
class FontSubsetInfo;
class OpenGLContext;
class OutputDevice;
class FreetypeFont;
struct SystemGraphicsData;

namespace basegfx {
    class B2DVector;
    class B2DPolygon;
    class B2DPolyPolygon;
}

namespace vcl
{
class AbstractTrueTypeFont;
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;

    rtl::Reference<OpenGLContext> GetOpenGLContext() const;

    void                        setAntiAliasB2DDraw(bool bNew) { m_bAntiAliasB2DDraw = bNew; }
    bool                        getAntiAliasB2DDraw() const { return m_bAntiAliasB2DDraw; }

    // 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 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( PhysicalFontCollection* ) = 0;

    // graphics must drop any cached font info
    virtual void                ClearDevFontCache() = 0;

    virtual bool                AddTempDevFont(
                                    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 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 PhysicalFontFace* pFont, long* pDataLen) = 0;

    // free the font data again
    virtual void                FreeEmbedFontData( const void* pData, 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 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( long& nX, const OutputDevice *pOutDev ) const;
    // only called mirror2 to avoid ambiguity
    [[nodiscard]]
    long                        mirror2( long nX, const OutputDevice *pOutDev ) const;
    void                        mirror( long& nX, long nWidth, const OutputDevice *pOutDev, bool bBack = false ) const;
    bool                        mirror( sal_uInt32 nPoints, const SalPoint *pPtAry, SalPoint *pPtAry2, const OutputDevice *pOutDev ) const;
    void                        mirror( tools::Rectangle& rRect, const OutputDevice*, bool bBack = false ) const;
    void                        mirror( vcl::Region& rRgn, const OutputDevice *pOutDev ) const;
    void                        mirror( ImplControlValue&, const OutputDevice* ) const;
    basegfx::B2DPolyPolygon     mirror( const basegfx::B2DPolyPolygon& i_rPoly, const OutputDevice *pOutDev ) const;
    const basegfx::B2DHomMatrix& getMirror( const OutputDevice *pOutDev ) const;

    // non virtual methods; these do possible coordinate mirroring and
    // then delegate to protected virtual methods
    bool                        SetClipRegion( const vcl::Region&, const OutputDevice *pOutDev );

    // draw --> LineColor and FillColor and RasterOp and ClipRegion
    void                        DrawPixel( long nX, long nY, const OutputDevice *pOutDev );
    void                        DrawPixel( long nX, long nY, Color nColor, const OutputDevice *pOutDev );

    void                        DrawLine( long nX1, long nY1, long nX2, long nY2, const OutputDevice *pOutDev );

    void                        DrawRect( long nX, long nY, long nWidth, long nHeight, const OutputDevice *pOutDev );

    void                        DrawPolyLine( sal_uInt32 nPoints, SalPoint const * pPtAry, const OutputDevice *pOutDev );

    void                        DrawPolygon( sal_uInt32 nPoints, const SalPoint* pPtAry, const OutputDevice *pOutDev );

    void                        DrawPolyPolygon(
                                    sal_uInt32 nPoly,
                                    const sal_uInt32* pPoints,
                                    PCONSTSALPOINT* pPtAry,
                                    const OutputDevice *pOutDev );

    bool                        DrawPolyPolygon(
                                    const basegfx::B2DHomMatrix& rObjectToDevice,
                                    const basegfx::B2DPolyPolygon &i_rPolyPolygon,
                                    double i_fTransparency,
                                    const OutputDevice *i_pOutDev);

    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_pOutDev);

    bool                        DrawPolyLineBezier(
                                    sal_uInt32 nPoints,
                                    const SalPoint* pPtAry,
                                    const PolyFlags* pFlgAry,
                                    const OutputDevice *pOutDev );

    bool                        DrawPolygonBezier(
                                    sal_uInt32 nPoints,
                                    const SalPoint* pPtAry,
                                    const PolyFlags* pFlgAry,
                                    const OutputDevice *pOutDev );

    bool                        DrawPolyPolygonBezier(
                                    sal_uInt32 nPoly,
                                    const sal_uInt32* pPoints,
                                    const SalPoint* const* pPtAry,
                                    const PolyFlags* const* pFlgAry,
                                    const OutputDevice *pOutDev );

    bool                        DrawGradient(
                                    const tools::PolyPolygon& rPolyPoly,
                                    const Gradient& rGradient );

    bool DrawGradient(basegfx::B2DPolyPolygon const & rPolyPolygon,
                      SalGradient const & rGradient);

    // CopyArea --> No RasterOp, but ClipRegion
    void                        CopyArea(
                                    long nDestX, long nDestY,
                                    long nSrcX, long nSrcY,
                                    long nSrcWidth, long nSrcHeight,
                                    const OutputDevice *pOutDev );

    // CopyBits and DrawBitmap --> RasterOp and ClipRegion
    // CopyBits() --> pSrcGraphics == NULL, then CopyBits on same Graphics
    void                        CopyBits(
                                    const SalTwoRect& rPosAry,
                                    SalGraphics* pSrcGraphics,
                                    const OutputDevice *pOutDev,
                                    const OutputDevice *pSrcOutDev );

    void                        DrawBitmap(
                                    const SalTwoRect& rPosAry,
                                    const SalBitmap& rSalBitmap,
                                    const OutputDevice *pOutDev );

    void                        DrawBitmap(
                                    const SalTwoRect& rPosAry,
                                    const SalBitmap& rSalBitmap,
                                    const SalBitmap& rTransparentBitmap,
                                    const OutputDevice *pOutDev );

    void                        DrawMask(
                                    const SalTwoRect& rPosAry,
                                    const SalBitmap& rSalBitmap,
                                    Color nMaskColor,
                                    const OutputDevice *pOutDev );

    std::shared_ptr<SalBitmap>  GetBitmap(
                                    long nX, long nY,
                                    long nWidth, long nHeight,
                                    const OutputDevice *pOutDev );

    Color                       GetPixel(
                                    long nX, long nY,
                                    const OutputDevice *pOutDev );

    // invert --> ClipRegion (only Windows)
    void                        Invert(
                                    long nX, long nY,
                                    long nWidth, long nHeight,
                                    SalInvert nFlags,
                                    const OutputDevice *pOutDev );

    void                        Invert(
                                    sal_uInt32 nPoints,
                                    const SalPoint* pPtAry,
                                    SalInvert nFlags,
                                    const OutputDevice *pOutDev );

    bool                        DrawEPS(
                                    long nX, long nY,
                                    long nWidth, long nHeight,
                                    void* pPtr,
                                    sal_uInt32 nSize,
                                    const OutputDevice *pOutDev );

    //  native widget rendering functions

    inline bool IsNativeControlSupported(ControlType, ControlPart);

    bool                        HitTestNativeScrollbar(
                                    ControlPart nPart,
                                    const tools::Rectangle& rControlRegion,
                                    const Point& aPos,
                                    bool& rIsInside,
                                    const OutputDevice *pOutDev );

    bool                        DrawNativeControl(
                                    ControlType nType,
                                    ControlPart nPart,
                                    const tools::Rectangle& rControlRegion,
                                    ControlState nState,
                                    const ImplControlValue& aValue,
                                    const OUString& aCaption,
                                    const OutputDevice *pOutDev,
                                    const Color& rBackgroundColor = COL_AUTO );

    bool                        GetNativeControlRegion(
                                    ControlType nType,
                                    ControlPart nPart,
                                    const tools::Rectangle& rControlRegion,
                                    ControlState nState,
                                    const ImplControlValue& aValue,
                                    tools::Rectangle &rNativeBoundingRegion,
                                    tools::Rectangle &rNativeContentRegion,
                                    const OutputDevice *pOutDev );

    inline bool UpdateSettings(AllSettings&);

    bool                        BlendBitmap(
                                    const SalTwoRect& rPosAry,
                                    const SalBitmap& rSalBitmap,
                                    const OutputDevice *pOutDev );

    bool                        BlendAlphaBitmap(
                                    const SalTwoRect& rPosAry,
                                    const SalBitmap& rSalSrcBitmap,
                                    const SalBitmap& rSalMaskBitmap,
                                    const SalBitmap& rSalAlphaBitmap,
                                    const OutputDevice *pOutDev );

    bool                        DrawAlphaBitmap(
                                    const SalTwoRect&,
                                    const SalBitmap& rSourceBitmap,
                                    const SalBitmap& rAlphaBitmap,
                                    const OutputDevice *pOutDev );

    bool                        DrawTransformedBitmap(
                                    const basegfx::B2DPoint& rNull,
                                    const basegfx::B2DPoint& rX,
                                    const basegfx::B2DPoint& rY,
                                    const SalBitmap& rSourceBitmap,
                                    const SalBitmap* pAlphaBitmap,
                                    const OutputDevice* pOutDev );

    bool                        DrawAlphaRect(
                                    long nX, long nY,
                                    long nWidth, long nHeight,
                                    sal_uInt8 nTransparency,
                                    const OutputDevice *pOutDev );

    virtual OUString getRenderBackendName() const;

    virtual SystemGraphicsData  GetGraphicsData() const = 0;

#if ENABLE_CAIRO_CANVAS

    virtual bool                SupportsCairo() const = 0;
    virtual cairo::SurfaceSharedPtr CreateSurface(const cairo::CairoSurfaceSharedPtr& rSurface) const = 0;
    virtual cairo::SurfaceSharedPtr CreateSurface(const OutputDevice& rRefDevice, int x, int y, int width, int height) const = 0;
    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:
    virtual bool                setClipRegion( const vcl::Region& ) = 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;

    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(
                                    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;

    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;

private:
    SalLayoutFlags              m_nLayout; //< 0: mirroring off, 1: mirror x-axis

    // for buffering the Mirror-Matrix, see ::getMirror
    basegfx::B2DHomMatrix       m_aLastMirror;
    long                        m_aLastMirrorW;

protected:
    bool                        m_bAntiAliasB2DDraw : 1;

    inline long GetDeviceWidth(const OutputDevice* pOutDev) const;

    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 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&) {}

#endif // INCLUDED_VCL_INC_SALGDI_HXX

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