freetype_glyphcache.hxx

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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 *   Licensed to the Apache Software Foundation (ASF) under one or more
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#ifndef INCLUDED_VCL_GENERIC_GLYPHS_GCACH_FTYP_HXX
#define INCLUDED_VCL_GENERIC_GLYPHS_GCACH_FTYP_HXX

#include <unx/glyphcache.hxx>
#include <PhysicalFontFace.hxx>
#include <fontinstance.hxx>
#include <vcl/glyphitem.hxx>

class CmapResult;

// FreetypeFontFile has the responsibility that a font file is only mapped once.
// (#86621#) the old directly ft-managed solution caused it to be mapped
// in up to nTTC*nSizes*nOrientation*nSynthetic times
class FreetypeFontFile final
{
public:
    bool                    Map();
    void                    Unmap();

    const unsigned char*    GetBuffer() const { return mpFileMap; }
    int                     GetFileSize() const { return mnFileSize; }
    const OString&          GetFileName() const { return maNativeFileName; }
    int                     GetLangBoost() const { return mnLangBoost; }

private:
    friend class FreetypeManager;
    explicit                FreetypeFontFile( const OString& rNativeFileName );

    const OString    maNativeFileName;
    unsigned char*   mpFileMap;
    int                     mnFileSize;
    int                     mnRefCount;
    int                     mnLangBoost;
};

// FreetypeFontInfo corresponds to an unscaled font face
class FreetypeFontInfo final
{
public:
    ~FreetypeFontInfo();

    const unsigned char*  GetTable( const char*, sal_uLong* pLength) const;

    FT_FaceRec_*          GetFaceFT();
    void                  ReleaseFaceFT();

    const OString&        GetFontFileName() const   { return mpFontFile->GetFileName(); }
    int                   GetFontFaceIndex() const  { return mnFaceNum; }
    int                   GetFontFaceVariation() const  { return mnFaceVariation; }
    sal_IntPtr            GetFontId() const         { return mnFontId; }
    bool                  IsSymbolFont() const      { return maDevFontAttributes.IsSymbolFont(); }
    const FontAttributes& GetFontAttributes() const { return maDevFontAttributes; }

    void                  AnnounceFont( PhysicalFontCollection* );

    const FontCharMapRef & GetFontCharMap() const;
    bool GetFontCapabilities(vcl::FontCapabilities&) const;

private:
    friend class FreetypeManager;
    explicit FreetypeFontInfo(const FontAttributes&, FreetypeFontFile* const pFontFile,
                              int nFaceNum, int nFaceVariation, sal_IntPtr nFontId);

    FT_FaceRec_*    maFaceFT;
    FreetypeFontFile* const mpFontFile;
    const int       mnFaceNum;
    const int       mnFaceVariation;
    int             mnRefCount;
    sal_IntPtr      mnFontId;
    FontAttributes  maDevFontAttributes;

    mutable FontCharMapRef mxFontCharMap;
};

class FreetypeFontFace : public PhysicalFontFace
{
private:
    FreetypeFontInfo*             mpFreetypeFontInfo;

public:
                            FreetypeFontFace( FreetypeFontInfo*, const FontAttributes& );

    virtual rtl::Reference<LogicalFontInstance> CreateFontInstance( const FontSelectPattern& ) const override;
    virtual sal_IntPtr      GetFontId() const override { return mpFreetypeFontInfo->GetFontId(); }

    FontCharMapRef GetFontCharMap() const override { return mpFreetypeFontInfo->GetFontCharMap(); }
    inline bool GetFontCapabilities(vcl::FontCapabilities&) const override;
};

bool FreetypeFontFace::GetFontCapabilities(vcl::FontCapabilities& rFontCapabilities) const
{
    return mpFreetypeFontInfo->GetFontCapabilities(rFontCapabilities);
}

class SAL_DLLPUBLIC_RTTI FreetypeFontInstance : public LogicalFontInstance
{
    friend rtl::Reference<LogicalFontInstance> FreetypeFontFace::CreateFontInstance(const FontSelectPattern&) const;

    std::unique_ptr<FreetypeFont> mxFreetypeFont;

    virtual hb_font_t* ImplInitHbFont() override;
    virtual bool ImplGetGlyphBoundRect(sal_GlyphId, tools::Rectangle&, bool) const override;

protected:
    explicit FreetypeFontInstance(const PhysicalFontFace& rPFF, const FontSelectPattern& rFSP);

public:
    virtual ~FreetypeFontInstance() override;

    FreetypeFont& GetFreetypeFont() const { return *mxFreetypeFont; }

    virtual bool GetGlyphOutline(sal_GlyphId, basegfx::B2DPolyPolygon&, bool) const override;
};

#endif // INCLUDED_VCL_GENERIC_GLYPHS_GCACH_FTYP_HXX

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