PdfFontMetricsObject.h

// SPDX-FileCopyrightText: 2010 Dominik Seichter <domseichter@web.de>
// SPDX-FileCopyrightText: 2020 Francesco Pretto <ceztko@gmail.com>
// SPDX-License-Identifier: LGPL-2.0-or-later OR MPL-2.0
 
#ifndef PDF_FONT_METRICS_OBJECT_H
#define PDF_FONT_METRICS_OBJECT_H
 
#include "PdfDeclarations.h"
 
#include <array>
 
#include "PdfFontMetrics.h"
#include "PdfArray.h"
#include "PdfName.h"
#include "PdfString.h"
 
 
namespace PoDoFo {
 
class PODOFO_API PdfFontMetricsObject final : public PdfFontMetricsBase
{
    friend class PdfFont;
 
private:
    PdfFontMetricsObject(const PdfDictionary& fontDict, const PdfReference& fontRef, const PdfDictionary* descriptorDict);
 
public:
    ~PdfFontMetricsObject();
 
    static std::unique_ptr<const PdfFontMetricsObject> Create(const PdfObject& font);
 
    bool HasUnicodeMapping() const override;
 
    bool TryGetGID(char32_t codePoint, unsigned& gid) const override;
 
    bool TryGetFlags(PdfFontDescriptorFlags& value) const override;
 
    bool TryGetBoundingBox(Corners& value) const override;
 
    bool TryGetItalicAngle(double& value) const override;
 
    bool TryGetAscent(double& value) const override;
 
    bool TryGetDescent(double& value) const override;
 
    bool TryGetCapHeight(double& value) const override;
 
    bool TryGetStemV(double& value) const override;
 
    double GetDefaultWidthRaw() const override;
 
    double GetLineSpacing() const override;
 
    double GetUnderlineThickness() const override;
 
    double GetUnderlinePosition() const override;
 
    double GetStrikeThroughPosition() const override;
 
    double GetStrikeThroughThickness() const override;
 
    std::string_view GetFontName() const override;
 
    std::string_view GetFontNameRaw() const override;
 
    std::string_view GetFontFamilyName() const override;
 
    unsigned char GetSubsetPrefixLength() const override;
 
    PdfFontStretch GetFontStretch() const override;
 
    double GetLeadingRaw() const override;
 
    int GetWeightRaw() const override;
 
    double GetXHeightRaw() const override;
 
    double GetStemHRaw() const override;
 
    double GetAvgWidthRaw() const override;
 
    double GetMaxWidthRaw() const override;
 
    PdfFontFileType GetFontFileType() const override;
 
    const PdfObject* GetFontFileObject() const override;
 
    unsigned GetFontFileLength1() const override;
 
    unsigned GetFontFileLength2() const override;
 
    unsigned GetFontFileLength3() const override;
 
    const Matrix& GetMatrix() const override;
 
    bool IsObjectLoaded() const override;
 
protected:
    void ExportType3GlyphData(PdfDictionary& fontDict, cspan<std::string_view> glyphs) const override;
 
    unsigned GetGlyphCountFontProgram() const override;
 
    std::string_view GetBaseFontName() const override;
 
    PdfFontType GetFontType() const override;
 
    bool getIsBoldHint() const override;
 
    bool getIsItalicHint() const override;
 
    datahandle getFontFileDataHandle() const override;
 
private:
    static std::unique_ptr<const PdfFontMetricsObject> Create(const PdfObject& font, const PdfDictionary* descriptor);
 
    void processFontName();
 
    Corners getBBox(const PdfObject& obj);
 
private:
    struct Type3FontData;
 
    std::shared_ptr<charbuff> m_Data;
    PdfCIDToGIDMapConstPtr m_CIDToGIDMap;
    Matrix m_Matrix;
 
    std::string m_FontName;
    std::string m_FontNameRaw;
    std::string m_FontBaseName;
    std::string m_FontFamilyName;
    unsigned char m_SubsetPrefixLength;
    bool m_IsItalicHint;
    bool m_IsBoldHint;
    bool m_HasBBox;
    PdfFontStretch m_FontStretch;
    short m_Weight;
 
    nullable<PdfFontDescriptorFlags> m_Flags;
    Corners m_BBox;
    double m_ItalicAngle;
    double m_Ascent;
    double m_Descent;
    double m_Leading;
    double m_CapHeight;
    double m_XHeight;
    double m_StemV;
    double m_StemH;
    double m_AvgWidth;
    double m_MaxWidth;
    double m_DefaultWidth;
 
    const PdfObject* m_FontFileObject;
    PdfFontType m_FontType;
    Type3FontData* m_Type3FontData;
    nullable<PdfFontFileType> m_FontFileType;
 
    unsigned m_Length1;
    unsigned m_Length2;
    unsigned m_Length3;
 
    double m_LineSpacing;
    double m_UnderlineThickness;
    double m_UnderlinePosition;
    double m_StrikeThroughThickness;
    double m_StrikeThroughPosition;
};
 
};
 
#endif // PDF_FONT_METRICS_OBJECT_H