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Type 3 font implementation

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Jakub Melka
2019-07-14 19:03:15 +02:00
parent 4239b6686a
commit 32dae5dc3c
4 changed files with 413 additions and 94 deletions
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45
PdfForQtLib/sources/pdffont.h
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@@ -23,6 +23,7 @@
#include "pdfobject.h"
#include <QFont>
#include <QMatrix>
#include <QSharedPointer>
#include <unordered_map>
@@ -57,12 +58,15 @@ struct TextSequenceItem
inline explicit TextSequenceItem() = default;
inline explicit TextSequenceItem(const QPainterPath* glyph, QChar character, PDFReal advance) : glyph(glyph), character(character), advance(advance) { }
inline explicit TextSequenceItem(PDFReal advance) : character(), advance(advance) { }
inline explicit TextSequenceItem(const QByteArray* characterContentStream, double advance) : characterContentStream(characterContentStream), advance(advance) { }
inline bool isContentStream() const { return characterContentStream; }
inline bool isCharacter() const { return glyph; }
inline bool isAdvance() const { return advance != 0.0; }
inline bool isNull() const { return !isCharacter() && !isAdvance(); }
const QPainterPath* glyph = nullptr;
const QByteArray* characterContentStream = nullptr;
QChar character;
PDFReal advance = 0;
};
@@ -122,7 +126,8 @@ enum class FontType
Invalid,
Type0,
Type1,
TrueType
TrueType,
Type3
};
/// Standard Type1 fonts
@@ -205,7 +210,7 @@ class PDFFont;
using PDFFontPointer = QSharedPointer<PDFFont>;
class PDFRealizedFont;
class PDFRealizedFontImpl;
class IRealizedFontImpl;
using PDFRealizedFontPointer = QSharedPointer<PDFRealizedFont>;
@@ -232,9 +237,9 @@ public:
private:
/// Constructs new realized font
explicit PDFRealizedFont(PDFRealizedFontImpl* impl) : m_impl(impl) { }
explicit PDFRealizedFont(IRealizedFontImpl* impl) : m_impl(impl) { }
PDFRealizedFontImpl* m_impl;
IRealizedFontImpl* m_impl;
};
/// Base class representing font in the PDF file
@@ -330,6 +335,38 @@ public:
virtual FontType getFontType() const override;
};
class PDFType3Font : public PDFFont
{
public:
explicit PDFType3Font(FontDescriptor fontDescriptor,
int firstCharacterIndex,
int lastCharacterIndex,
QMatrix fontMatrix,
std::map<int, QByteArray>&& characterContentStreams,
std::vector<double>&& widths,
const PDFObject& resources);
virtual FontType getFontType() const override;
/// Returns width of the character. If character doesn't exist, then zero is returned.
double getWidth(int characterIndex) const;
/// Return content stream for the character. If character doesn't exist, then nullptr
/// is returned.
const QByteArray* getContentStream(int characterIndex) const;
const QMatrix& getFontMatrix() const { return m_fontMatrix; }
const PDFObject& getResources() const { return m_resources; }
private:
int m_firstCharacterIndex;
int m_lastCharacterIndex;
QMatrix m_fontMatrix;
std::map<int, QByteArray> m_characterContentStreams;
std::vector<double> m_widths;
PDFObject m_resources;
};
/// Font cache which caches both fonts, and realized fonts. Cache has individual limit
/// for fonts, and realized fonts.
class PDFFontCache