mirror of https://github.com/JakubMelka/PDF4QT.git
2394 lines
92 KiB
C++
2394 lines
92 KiB
C++
// Copyright (C) 2019-2020 Jakub Melka
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//
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// This file is part of PdfForQt.
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//
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// PdfForQt is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// PdfForQt is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with PDFForQt. If not, see <https://www.gnu.org/licenses/>.
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#include "pdffont.h"
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#include "pdfdocument.h"
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#include "pdfparser.h"
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#include "pdfnametounicode.h"
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#include "pdfexception.h"
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#include <ft2build.h>
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#include <freetype/freetype.h>
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#include <freetype/ftglyph.h>
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#include <freetype/fterrors.h>
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#include <freetype/ftoutln.h>
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#include <freetype/t1tables.h>
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#include <QMutex>
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#include <QPainterPath>
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#include <QDataStream>
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#include <QTreeWidgetItem>
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#ifdef Q_OS_WIN
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#include "Windows.h"
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#pragma comment(lib, "Gdi32")
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#pragma comment(lib, "User32")
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#endif
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namespace pdf
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{
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/// Storage class for system fonts
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class PDFSystemFontInfoStorage
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{
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public:
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/// Returns instance of storage
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static const PDFSystemFontInfoStorage* getInstance();
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/// Loads font from descriptor
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/// \param descriptor Descriptor describing the font
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QByteArray loadFont(const FontDescriptor* descriptor, StandardFontType standardFontType, PDFRenderErrorReporter* reporter) const;
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private:
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explicit PDFSystemFontInfoStorage();
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#ifdef Q_OS_WIN
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/// Callback for enumerating fonts
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static int CALLBACK enumerateFontProc(const LOGFONT* font, const TEXTMETRIC* textMetrics, DWORD fontType, LPARAM lParam);
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/// Retrieves font data for desired font
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static QByteArray getFontData(const LOGFONT* font, HDC hdc);
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/// Create a postscript name for comparation purposes
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static QString getFontPostscriptName(QString fontName);
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struct FontInfo
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{
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QString faceName;
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QString faceNameAdjusted;
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LOGFONT logFont;
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TEXTMETRIC textMetric;
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};
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struct CallbackInfo
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{
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PDFSystemFontInfoStorage* storage = nullptr;
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HDC hdc = nullptr;
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};
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std::vector<FontInfo> m_fontInfos;
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#endif
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};
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const PDFSystemFontInfoStorage* PDFSystemFontInfoStorage::getInstance()
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{
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static PDFSystemFontInfoStorage instance;
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return &instance;
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}
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QByteArray PDFSystemFontInfoStorage::loadFont(const FontDescriptor* descriptor, StandardFontType standardFontType, PDFRenderErrorReporter* reporter) const
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{
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QByteArray result;
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#ifdef Q_OS_WIN
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HDC hdc = GetDC(NULL);
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const BYTE lfItalic = (descriptor->italicAngle != 0.0 ? TRUE : FALSE);
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// Exact match font face name
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QString fontName;
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switch (standardFontType)
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{
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case StandardFontType::TimesRoman:
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case StandardFontType::TimesRomanBold:
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case StandardFontType::TimesRomanItalics:
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case StandardFontType::TimesRomanBoldItalics:
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{
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fontName = "TimesNewRoman";
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break;
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}
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case StandardFontType::Helvetica:
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case StandardFontType::HelveticaBold:
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case StandardFontType::HelveticaOblique:
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case StandardFontType::HelveticaBoldOblique:
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{
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fontName = "Arial";
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break;
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}
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case StandardFontType::Courier:
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case StandardFontType::CourierBold:
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case StandardFontType::CourierOblique:
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case StandardFontType::CourierBoldOblique:
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{
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fontName = "CourierNew";
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break;
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}
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case StandardFontType::Symbol:
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case StandardFontType::ZapfDingbats:
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{
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fontName = "Symbol";
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break;
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}
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default:
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{
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fontName = getFontPostscriptName(descriptor->fontName);
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break;
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}
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}
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if (!fontName.isEmpty())
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{
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for (const FontInfo& fontInfo : m_fontInfos)
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{
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if (fontInfo.faceNameAdjusted == fontName &&
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fontInfo.logFont.lfWeight == descriptor->fontWeight &&
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fontInfo.logFont.lfItalic == lfItalic)
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{
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result = getFontData(&fontInfo.logFont, hdc);
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if (!result.isEmpty())
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{
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break;
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}
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}
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}
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// Match for font family
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if (result.isEmpty())
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{
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for (const FontInfo& fontInfo : m_fontInfos)
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{
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if (fontInfo.faceNameAdjusted == fontName)
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{
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LOGFONT logFont = fontInfo.logFont;
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logFont.lfWeight = descriptor->fontWeight;
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logFont.lfItalic = lfItalic;
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result = getFontData(&logFont, hdc);
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if (!result.isEmpty())
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{
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break;
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}
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}
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}
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}
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}
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// Exact match for font, if font can't be exact matched, then match font family
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// and try to set weight
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QString fontFamily = QString::fromLatin1(descriptor->fontFamily);
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if (!fontFamily.isEmpty() && result.isEmpty())
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{
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for (const FontInfo& fontInfo : m_fontInfos)
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{
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if (fontInfo.faceName.contains(fontFamily) &&
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fontInfo.logFont.lfWeight == descriptor->fontWeight &&
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fontInfo.logFont.lfItalic == lfItalic)
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{
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result = getFontData(&fontInfo.logFont, hdc);
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if (!result.isEmpty())
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{
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reporter->reportRenderError(RenderErrorType::Warning, PDFTranslationContext::tr("Inexact font substitution: font %1 replaced by %2 using font family %3.").arg(fontName, fontInfo.faceNameAdjusted, fontFamily));
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break;
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}
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}
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}
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// Match for font family
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if (result.isEmpty())
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{
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for (const FontInfo& fontInfo : m_fontInfos)
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{
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if (fontInfo.faceName.contains(fontFamily))
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{
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LOGFONT logFont = fontInfo.logFont;
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logFont.lfWeight = descriptor->fontWeight;
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logFont.lfItalic = lfItalic;
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result = getFontData(&logFont, hdc);
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if (!result.isEmpty())
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{
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reporter->reportRenderError(RenderErrorType::Warning, PDFTranslationContext::tr("Inexact font substitution: font %1 replaced by %2 using font family %3.").arg(fontName, fontInfo.faceNameAdjusted, fontFamily));
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break;
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}
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}
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}
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}
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}
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// Try to inexact match for font name - find similar font
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if (!fontName.isEmpty() && result.isEmpty())
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{
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for (const FontInfo& fontInfo : m_fontInfos)
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{
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if (fontInfo.faceNameAdjusted.contains(fontName))
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{
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LOGFONT logFont = fontInfo.logFont;
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logFont.lfWeight = descriptor->fontWeight;
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logFont.lfItalic = lfItalic;
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result = getFontData(&logFont, hdc);
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if (!result.isEmpty())
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{
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reporter->reportRenderError(RenderErrorType::Warning, PDFTranslationContext::tr("Inexact font substitution: font %1 replaced by %2.").arg(fontName, fontInfo.faceNameAdjusted));
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break;
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}
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}
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}
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}
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ReleaseDC(NULL, hdc);
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#endif
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if (result.isEmpty() && standardFontType == StandardFontType::Invalid)
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{
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reporter->reportRenderError(RenderErrorType::Warning, PDFTranslationContext::tr("Inexact font substitution: font %1 replaced by standard font Times New Roman.").arg(fontName));
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result = loadFont(descriptor, StandardFontType::TimesRoman, reporter);
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}
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return result;
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}
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PDFSystemFontInfoStorage::PDFSystemFontInfoStorage()
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{
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#ifdef Q_OS_WIN
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LOGFONT logfont;
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std::memset(&logfont, 0, sizeof(logfont));
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logfont.lfCharSet = DEFAULT_CHARSET;
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logfont.lfFaceName[0] = 0;
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logfont.lfPitchAndFamily = 0;
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HDC hdc = GetDC(NULL);
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CallbackInfo callbackInfo{ this, hdc};
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EnumFontFamiliesEx(hdc, &logfont, &PDFSystemFontInfoStorage::enumerateFontProc, reinterpret_cast<LPARAM>(&callbackInfo), 0);
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ReleaseDC(NULL, hdc);
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#endif
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}
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#ifdef Q_OS_WIN
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int PDFSystemFontInfoStorage::enumerateFontProc(const LOGFONT* font, const TEXTMETRIC* textMetrics, DWORD fontType, LPARAM lParam)
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{
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if ((fontType & TRUETYPE_FONTTYPE) && (font->lfCharSet == ANSI_CHARSET))
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{
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CallbackInfo* callbackInfo = reinterpret_cast<CallbackInfo*>(lParam);
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FontInfo fontInfo;
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fontInfo.logFont = *font;
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fontInfo.textMetric = *textMetrics;
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fontInfo.faceName = QString::fromWCharArray(font->lfFaceName);
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fontInfo.faceNameAdjusted = getFontPostscriptName(fontInfo.faceName);
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callbackInfo->storage->m_fontInfos.push_back(qMove(fontInfo));
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// For debug purposes only!
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#if 0
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QByteArray byteArray = getFontData(font, callbackInfo->hdc);
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qDebug() << "Font: " << QString::fromWCharArray(font->lfFaceName) << ", italic = " << font->lfItalic << ", weight = " << font->lfWeight << ", data size = " << byteArray.size();
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#endif
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}
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return TRUE;
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}
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QByteArray PDFSystemFontInfoStorage::getFontData(const LOGFONT* font, HDC hdc)
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{
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QByteArray byteArray;
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if (HFONT fontHandle = ::CreateFontIndirect(font))
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{
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HGDIOBJ oldFont = ::SelectObject(hdc, fontHandle);
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DWORD size = ::GetFontData(hdc, 0, 0, nullptr, 0);
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if (size != GDI_ERROR)
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{
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byteArray.resize(static_cast<int>(size));
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::GetFontData(hdc, 0, 0, byteArray.data(), byteArray.size());
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}
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::SelectObject(hdc, oldFont);
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::DeleteObject(fontHandle);
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}
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return byteArray;
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}
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QString PDFSystemFontInfoStorage::getFontPostscriptName(QString fontName)
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{
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for (const char* string : { "PS", "MT", "Regular", "Bold", "Italic", "Oblique" })
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{
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fontName.remove(QLatin1String(string), Qt::CaseInsensitive);
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}
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return fontName.remove(QChar(' ')).remove(QChar('-')).remove(QChar(',')).trimmed();
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}
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#endif
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PDFFont::PDFFont(FontDescriptor fontDescriptor) :
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m_fontDescriptor(qMove(fontDescriptor))
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{
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}
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class IRealizedFontImpl
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{
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public:
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explicit IRealizedFontImpl() = default;
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virtual ~IRealizedFontImpl() = default;
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/// Fills the text sequence by interpreting byte array according font data and
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/// produces glyphs for the font.
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/// \param byteArray Array of bytes to be interpreted
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/// \param textSequence Text sequence to be filled
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virtual void fillTextSequence(const QByteArray& byteArray, TextSequence& textSequence, PDFRenderErrorReporter* reporter) = 0;
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/// Returns true, if font has horizontal writing system
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virtual bool isHorizontalWritingSystem() const = 0;
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/// Dumps information about the font
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virtual void dumpFontToTreeItem(QTreeWidgetItem* item) const { Q_UNUSED(item); }
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/// Returns postscript name of the font
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virtual QString getPostScriptName() const { return QString(); }
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/// Returns character info
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virtual CharacterInfos getCharacterInfos() const = 0;
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};
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/// Implementation of the PDFRealizedFont class using PIMPL pattern for Type 3 fonts
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class PDFRealizedType3FontImpl : public IRealizedFontImpl
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{
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public:
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explicit PDFRealizedType3FontImpl(PDFFontPointer parentFont, PDFReal pixelSize) : m_parentFont(parentFont), m_pixelSize(pixelSize) { }
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virtual ~PDFRealizedType3FontImpl() override = default;
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virtual void fillTextSequence(const QByteArray& byteArray, TextSequence& textSequence, PDFRenderErrorReporter* reporter) override;
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virtual bool isHorizontalWritingSystem() const override;
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virtual CharacterInfos getCharacterInfos() const override;
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private:
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/// Pixel size of the font
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PDFReal m_pixelSize = 0.0;
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/// Parent font
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PDFFontPointer m_parentFont;
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};
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/// Implementation of the PDFRealizedFont class using PIMPL pattern
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class PDFRealizedFontImpl : public IRealizedFontImpl
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{
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public:
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explicit PDFRealizedFontImpl();
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virtual ~PDFRealizedFontImpl();
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virtual void fillTextSequence(const QByteArray& byteArray, TextSequence& textSequence, PDFRenderErrorReporter* reporter) override;
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virtual bool isHorizontalWritingSystem() const override { return !m_isVertical; }
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virtual void dumpFontToTreeItem(QTreeWidgetItem* item) const override;
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virtual QString getPostScriptName() const override { return m_postScriptName; }
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virtual CharacterInfos getCharacterInfos() const override;
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static constexpr const PDFReal PIXEL_SIZE_MULTIPLIER = 100.0;
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private:
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friend class PDFRealizedFont;
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static constexpr const PDFReal FONT_WIDTH_MULTIPLIER = 1.0 / 1000.0;
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static constexpr const PDFReal FORMAT_26_6_MULTIPLIER = 1 / 64.0;
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static constexpr const PDFReal FONT_MULTIPLIER = FORMAT_26_6_MULTIPLIER / PIXEL_SIZE_MULTIPLIER;
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struct Glyph
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{
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QPainterPath glyph;
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PDFReal advance = 0.0;
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};
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static int outlineMoveTo(const FT_Vector* to, void* user);
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static int outlineLineTo(const FT_Vector* to, void* user);
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static int outlineConicTo(const FT_Vector* control, const FT_Vector* to, void* user);
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static int outlineCubicTo(const FT_Vector* control1, const FT_Vector* control2, const FT_Vector* to, void* user);
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/// Get glyph for glyph index
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const Glyph& getGlyph(unsigned int glyphIndex);
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/// Function checks, if error occured, and if yes, then exception is thrown
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static void checkFreeTypeError(FT_Error error);
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/// Mutex for accessing the glyph data
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QMutex m_mutex;
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/// Glyph cache, must be protected by the mutex above
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std::map<unsigned int, Glyph> m_glyphCache;
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/// For embedded fonts, this byte array contains embedded font data
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QByteArray m_embeddedFontData;
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/// For system fonts, this byte array contains system font data
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QByteArray m_systemFontData;
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/// Instance of FreeType library assigned to this font
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FT_Library m_library;
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/// Face of the font
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FT_Face m_face;
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/// Pixel size of the font
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PDFReal m_pixelSize;
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/// Parent font
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PDFFontPointer m_parentFont;
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/// True, if font is embedded
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bool m_isEmbedded;
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/// True, if font has vertical writing system
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bool m_isVertical;
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/// Postscript name of the font
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QString m_postScriptName;
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};
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PDFRealizedFontImpl::PDFRealizedFontImpl() :
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m_library(nullptr),
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m_face(nullptr),
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m_pixelSize(0.0),
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m_parentFont(nullptr),
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m_isEmbedded(false),
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m_isVertical(false)
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{
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}
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PDFRealizedFontImpl::~PDFRealizedFontImpl()
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{
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if (m_face)
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{
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FT_Done_Face(m_face);
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m_face = nullptr;
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}
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if (m_library)
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{
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FT_Done_FreeType(m_library);
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m_library = nullptr;
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}
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}
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void PDFRealizedFontImpl::fillTextSequence(const QByteArray& byteArray, TextSequence& textSequence, PDFRenderErrorReporter* reporter)
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{
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switch (m_parentFont->getFontType())
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{
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case FontType::Type1:
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case FontType::TrueType:
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case FontType::MMType1:
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{
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// We can use encoding
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Q_ASSERT(dynamic_cast<PDFSimpleFont*>(m_parentFont.get()));
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const PDFSimpleFont* font = static_cast<PDFSimpleFont*>(m_parentFont.get());
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const encoding::EncodingTable* encoding = font->getEncoding();
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const GlyphIndices* glyphIndices = font->getGlyphIndices();
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textSequence.items.reserve(textSequence.items.size() + byteArray.size());
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for (int i = 0, count = byteArray.size(); i < count; ++i)
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{
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GID glyphIndex = (*glyphIndices)[static_cast<uint8_t>(byteArray[i])];
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if (!glyphIndex)
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{
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// Try to obtain glyph index from unicode
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if (m_face->charmap && m_face->charmap->encoding == FT_ENCODING_UNICODE)
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{
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glyphIndex = FT_Get_Char_Index(m_face, (*encoding)[static_cast<uint8_t>(byteArray[i])].unicode());
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}
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}
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const PDFReal glyphWidth = font->getGlyphAdvance(static_cast<uint8_t>(byteArray[i]));
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if (glyphIndex)
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{
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const Glyph& glyph = getGlyph(glyphIndex);
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textSequence.items.emplace_back(&glyph.glyph, (*encoding)[static_cast<uint8_t>(byteArray[i])], glyph.advance);
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}
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else
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{
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reporter->reportRenderError(RenderErrorType::Warning, PDFTranslationContext::tr("Glyph for simple font character code '%1' not found.").arg(static_cast<uint8_t>(byteArray[i])));
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if (glyphWidth > 0)
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{
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const QPainterPath* nullpath = nullptr;
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textSequence.items.emplace_back(nullpath, QChar(), glyphWidth * m_pixelSize * FONT_WIDTH_MULTIPLIER);
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}
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}
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}
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break;
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}
|
|
|
|
case FontType::Type0:
|
|
{
|
|
Q_ASSERT(dynamic_cast<PDFType0Font*>(m_parentFont.get()));
|
|
const PDFType0Font* font = static_cast<PDFType0Font*>(m_parentFont.get());
|
|
|
|
const PDFFontCMap* cmap = font->getCMap();
|
|
const PDFFontCMap* toUnicode = font->getToUnicode();
|
|
const PDFCIDtoGIDMapper* CIDtoGIDmapper = font->getCIDtoGIDMapper();
|
|
|
|
std::vector<CID> cids = cmap->interpret(byteArray);
|
|
textSequence.items.reserve(textSequence.items.size() + cids.size());
|
|
for (CID cid : cids)
|
|
{
|
|
const GID glyphIndex = CIDtoGIDmapper->map(cid);
|
|
const PDFReal glyphWidth = font->getGlyphAdvance(cid);
|
|
|
|
if (glyphIndex)
|
|
{
|
|
QChar character = toUnicode->getToUnicode(cid);
|
|
const Glyph& glyph = getGlyph(glyphIndex);
|
|
textSequence.items.emplace_back(&glyph.glyph, character, glyph.advance);
|
|
}
|
|
else
|
|
{
|
|
if (cid > 0)
|
|
{
|
|
// Character with CID == 0 is treated as default whitespace, it hasn't glyph
|
|
reporter->reportRenderError(RenderErrorType::Warning, PDFTranslationContext::tr("Glyph for composite font character with cid '%1' not found.").arg(cid));
|
|
}
|
|
|
|
if (glyphWidth > 0)
|
|
{
|
|
// We do not multiply advance with font size and FONT_WIDTH_MULTIPLIER, because in the code,
|
|
// "advance" is treated as in font space.
|
|
const QPainterPath* nullpath = nullptr;
|
|
textSequence.items.emplace_back(nullpath, QChar(), -glyphWidth);
|
|
}
|
|
}
|
|
}
|
|
|
|
break;
|
|
}
|
|
|
|
default:
|
|
{
|
|
// Unhandled font type
|
|
Q_ASSERT(false);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
CharacterInfos PDFRealizedFontImpl::getCharacterInfos() const
|
|
{
|
|
CharacterInfos result;
|
|
|
|
switch (m_parentFont->getFontType())
|
|
{
|
|
case FontType::Type1:
|
|
case FontType::TrueType:
|
|
case FontType::MMType1:
|
|
{
|
|
// We can use encoding
|
|
Q_ASSERT(dynamic_cast<PDFSimpleFont*>(m_parentFont.get()));
|
|
const PDFSimpleFont* font = static_cast<PDFSimpleFont*>(m_parentFont.get());
|
|
const encoding::EncodingTable* encoding = font->getEncoding();
|
|
const GlyphIndices* glyphIndices = font->getGlyphIndices();
|
|
|
|
for (size_t i = 0; i < encoding->size(); ++i)
|
|
{
|
|
QChar character = (*encoding)[i];
|
|
GID glyphIndex = (*glyphIndices)[static_cast<uint8_t>(i)];
|
|
|
|
if (!glyphIndex)
|
|
{
|
|
// Try to obtain glyph index from unicode
|
|
if (m_face->charmap && m_face->charmap->encoding == FT_ENCODING_UNICODE)
|
|
{
|
|
glyphIndex = FT_Get_Char_Index(m_face, character.unicode());
|
|
}
|
|
}
|
|
|
|
if (glyphIndex)
|
|
{
|
|
CharacterInfo info;
|
|
info.gid = glyphIndex;
|
|
info.character = character;
|
|
result.emplace_back(qMove(info));
|
|
}
|
|
}
|
|
|
|
break;
|
|
}
|
|
|
|
case FontType::Type0:
|
|
{
|
|
Q_ASSERT(dynamic_cast<PDFType0Font*>(m_parentFont.get()));
|
|
const PDFType0Font* font = static_cast<PDFType0Font*>(m_parentFont.get());
|
|
|
|
const PDFFontCMap* toUnicode = font->getToUnicode();
|
|
const PDFCIDtoGIDMapper* CIDtoGIDmapper = font->getCIDtoGIDMapper();
|
|
|
|
FT_UInt index = 0;
|
|
FT_ULong character = FT_Get_First_Char(m_face, &index);
|
|
while (index != 0)
|
|
{
|
|
const GID gid = index;
|
|
const CID cid = CIDtoGIDmapper->unmap(gid);
|
|
|
|
CharacterInfo info;
|
|
info.gid = gid;
|
|
info.character = toUnicode->getToUnicode(cid);
|
|
result.emplace_back(qMove(info));
|
|
|
|
character = FT_Get_Next_Char(m_face, character, &index);
|
|
}
|
|
|
|
if (result.empty())
|
|
{
|
|
// We will try all reasonable high CIDs
|
|
for (CID cid = 0; cid < QChar::LastValidCodePoint; ++cid)
|
|
{
|
|
const GID gid = CIDtoGIDmapper->map(cid);
|
|
|
|
if (!gid)
|
|
{
|
|
continue;
|
|
}
|
|
|
|
if (!FT_Load_Glyph(m_face, gid, FT_LOAD_NO_BITMAP | FT_LOAD_NO_HINTING))
|
|
{
|
|
CharacterInfo info;
|
|
info.gid = gid;
|
|
info.character = toUnicode->getToUnicode(cid);
|
|
result.emplace_back(qMove(info));
|
|
}
|
|
}
|
|
}
|
|
|
|
break;
|
|
}
|
|
|
|
default:
|
|
{
|
|
// Unhandled font type
|
|
Q_ASSERT(false);
|
|
break;
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
void PDFRealizedFontImpl::dumpFontToTreeItem(QTreeWidgetItem* item) const
|
|
{
|
|
QTreeWidgetItem* root = new QTreeWidgetItem(item, { PDFTranslationContext::tr("Details") });
|
|
|
|
if (m_face->family_name)
|
|
{
|
|
new QTreeWidgetItem(root, { PDFTranslationContext::tr("Font"), QString::fromLatin1(m_face->family_name) });
|
|
}
|
|
if (m_face->style_name)
|
|
{
|
|
new QTreeWidgetItem(root, { PDFTranslationContext::tr("Style"), QString::fromLatin1(m_face->style_name) });
|
|
}
|
|
|
|
QString yesString = PDFTranslationContext::tr("Yes");
|
|
QString noString = PDFTranslationContext::tr("No");
|
|
|
|
new QTreeWidgetItem(root, { PDFTranslationContext::tr("Glyph count"), QString::number(m_face->num_glyphs) });
|
|
new QTreeWidgetItem(root, { PDFTranslationContext::tr("Is CID keyed"), (m_face->face_flags & FT_FACE_FLAG_CID_KEYED) ? yesString : noString });
|
|
new QTreeWidgetItem(root, { PDFTranslationContext::tr("Is bold"), (m_face->style_flags & FT_STYLE_FLAG_BOLD) ? yesString : noString });
|
|
new QTreeWidgetItem(root, { PDFTranslationContext::tr("Is italics"), (m_face->style_flags & FT_STYLE_FLAG_ITALIC) ? yesString : noString });
|
|
new QTreeWidgetItem(root, { PDFTranslationContext::tr("Has vertical writing system"), (m_face->face_flags & FT_FACE_FLAG_VERTICAL) ? yesString : noString });
|
|
new QTreeWidgetItem(root, { PDFTranslationContext::tr("Has SFNT storage scheme"), (m_face->face_flags & FT_FACE_FLAG_SFNT) ? yesString : noString });
|
|
new QTreeWidgetItem(root, { PDFTranslationContext::tr("Has glyph names"), (m_face->face_flags & FT_FACE_FLAG_GLYPH_NAMES) ? yesString : noString });
|
|
|
|
if (m_face->num_charmaps > 0)
|
|
{
|
|
QTreeWidgetItem* encodingRoot = new QTreeWidgetItem(item, { PDFTranslationContext::tr("Encoding") });
|
|
for (FT_Int i = 0; i < m_face->num_charmaps; ++i)
|
|
{
|
|
FT_CharMap charMap = m_face->charmaps[i];
|
|
|
|
const FT_Encoding encoding = charMap->encoding;
|
|
QString encodingName;
|
|
switch (encoding)
|
|
{
|
|
case FT_ENCODING_NONE:
|
|
encodingName = PDFTranslationContext::tr("None");
|
|
break;
|
|
|
|
case FT_ENCODING_UNICODE:
|
|
encodingName = PDFTranslationContext::tr("Unicode");
|
|
break;
|
|
|
|
case FT_ENCODING_MS_SYMBOL:
|
|
encodingName = PDFTranslationContext::tr("MS Symbol");
|
|
break;
|
|
|
|
case FT_ENCODING_SJIS:
|
|
encodingName = PDFTranslationContext::tr("Japanese Shift JIS");
|
|
break;
|
|
|
|
case FT_ENCODING_PRC:
|
|
encodingName = PDFTranslationContext::tr("PRC - Simplified Chinese");
|
|
break;
|
|
|
|
case FT_ENCODING_BIG5:
|
|
encodingName = PDFTranslationContext::tr("Traditional Chinese");
|
|
break;
|
|
|
|
case FT_ENCODING_WANSUNG:
|
|
encodingName = PDFTranslationContext::tr("Korean Extended Wansung");
|
|
break;
|
|
|
|
case FT_ENCODING_JOHAB:
|
|
encodingName = PDFTranslationContext::tr("Korean Standard");
|
|
break;
|
|
|
|
case FT_ENCODING_ADOBE_STANDARD:
|
|
encodingName = PDFTranslationContext::tr("Adobe Standard");
|
|
break;
|
|
|
|
case FT_ENCODING_ADOBE_EXPERT:
|
|
encodingName = PDFTranslationContext::tr("Adobe Expert");
|
|
break;
|
|
case FT_ENCODING_ADOBE_CUSTOM:
|
|
encodingName = PDFTranslationContext::tr("Adobe Custom");
|
|
break;
|
|
|
|
case FT_ENCODING_ADOBE_LATIN_1:
|
|
encodingName = PDFTranslationContext::tr("Adobe Latin 1");
|
|
break;
|
|
|
|
case FT_ENCODING_OLD_LATIN_2:
|
|
encodingName = PDFTranslationContext::tr("Old Latin 1");
|
|
break;
|
|
|
|
case FT_ENCODING_APPLE_ROMAN:
|
|
encodingName = PDFTranslationContext::tr("Apple Roman");
|
|
break;
|
|
|
|
default:
|
|
encodingName = PDFTranslationContext::tr("Unknown");
|
|
break;
|
|
}
|
|
|
|
QString encodingString = PDFTranslationContext::tr("Platform/Encoding = %1 %2").arg(charMap->platform_id).arg(charMap->encoding_id);
|
|
new QTreeWidgetItem(encodingRoot, { encodingName, encodingString });
|
|
}
|
|
}
|
|
}
|
|
|
|
int PDFRealizedFontImpl::outlineMoveTo(const FT_Vector* to, void* user)
|
|
{
|
|
Glyph* glyph = reinterpret_cast<Glyph*>(user);
|
|
glyph->glyph.moveTo(to->x * FONT_MULTIPLIER, to->y * FONT_MULTIPLIER);
|
|
return 0;
|
|
}
|
|
|
|
int PDFRealizedFontImpl::outlineLineTo(const FT_Vector* to, void* user)
|
|
{
|
|
Glyph* glyph = reinterpret_cast<Glyph*>(user);
|
|
glyph->glyph.lineTo(to->x * FONT_MULTIPLIER, to->y * FONT_MULTIPLIER);
|
|
return 0;
|
|
}
|
|
|
|
int PDFRealizedFontImpl::outlineConicTo(const FT_Vector* control, const FT_Vector* to, void* user)
|
|
{
|
|
Glyph* glyph = reinterpret_cast<Glyph*>(user);
|
|
glyph->glyph.quadTo(control->x * FONT_MULTIPLIER, control->y * FONT_MULTIPLIER, to->x * FONT_MULTIPLIER, to->y * FONT_MULTIPLIER);
|
|
return 0;
|
|
}
|
|
|
|
int PDFRealizedFontImpl::outlineCubicTo(const FT_Vector* control1, const FT_Vector* control2, const FT_Vector* to, void* user)
|
|
{
|
|
Glyph* glyph = reinterpret_cast<Glyph*>(user);
|
|
glyph->glyph.cubicTo(control1->x * FONT_MULTIPLIER, control1->y * FONT_MULTIPLIER, control2->x * FONT_MULTIPLIER, control2->y * FONT_MULTIPLIER, to->x * FONT_MULTIPLIER, to->y * FONT_MULTIPLIER);
|
|
return 0;
|
|
}
|
|
|
|
const PDFRealizedFontImpl::Glyph& PDFRealizedFontImpl::getGlyph(unsigned int glyphIndex)
|
|
{
|
|
QMutexLocker lock(&m_mutex);
|
|
|
|
// First look into cache
|
|
auto it = m_glyphCache.find(glyphIndex);
|
|
if (it != m_glyphCache.cend())
|
|
{
|
|
return it->second;
|
|
}
|
|
|
|
if (glyphIndex)
|
|
{
|
|
Glyph glyph;
|
|
|
|
FT_Outline_Funcs glyphOutlineInterface;
|
|
glyphOutlineInterface.delta = 0;
|
|
glyphOutlineInterface.shift = 0;
|
|
glyphOutlineInterface.move_to = PDFRealizedFontImpl::outlineMoveTo;
|
|
glyphOutlineInterface.line_to = PDFRealizedFontImpl::outlineLineTo;
|
|
glyphOutlineInterface.conic_to = PDFRealizedFontImpl::outlineConicTo;
|
|
glyphOutlineInterface.cubic_to = PDFRealizedFontImpl::outlineCubicTo;
|
|
|
|
checkFreeTypeError(FT_Load_Glyph(m_face, glyphIndex, FT_LOAD_NO_BITMAP | FT_LOAD_NO_HINTING));
|
|
checkFreeTypeError(FT_Outline_Decompose(&m_face->glyph->outline, &glyphOutlineInterface, &glyph));
|
|
glyph.glyph.closeSubpath();
|
|
glyph.advance = !m_isVertical ? m_face->glyph->advance.x : m_face->glyph->advance.y;
|
|
glyph.advance *= FONT_MULTIPLIER;
|
|
|
|
m_glyphCache[glyphIndex] = qMove(glyph);
|
|
return m_glyphCache[glyphIndex];
|
|
}
|
|
|
|
static Glyph dummy;
|
|
return dummy;
|
|
}
|
|
|
|
void PDFRealizedFontImpl::checkFreeTypeError(FT_Error error)
|
|
{
|
|
if (error)
|
|
{
|
|
QString message;
|
|
if (const char* errorString = FT_Error_String(error))
|
|
{
|
|
message = QString::fromLatin1(errorString);
|
|
}
|
|
|
|
throw PDFException(PDFTranslationContext::tr("FreeType error code %1: %2").arg(error).arg(message));
|
|
}
|
|
}
|
|
|
|
PDFRealizedFont::~PDFRealizedFont()
|
|
{
|
|
delete m_impl;
|
|
}
|
|
|
|
void PDFRealizedFont::fillTextSequence(const QByteArray& byteArray, TextSequence& textSequence, PDFRenderErrorReporter* reporter)
|
|
{
|
|
m_impl->fillTextSequence(byteArray, textSequence, reporter);
|
|
}
|
|
|
|
bool PDFRealizedFont::isHorizontalWritingSystem() const
|
|
{
|
|
return m_impl->isHorizontalWritingSystem();
|
|
}
|
|
|
|
void PDFRealizedFont::dumpFontToTreeItem(QTreeWidgetItem* item) const
|
|
{
|
|
m_impl->dumpFontToTreeItem(item);
|
|
}
|
|
|
|
QString PDFRealizedFont::getPostScriptName() const
|
|
{
|
|
return m_impl->getPostScriptName();
|
|
}
|
|
|
|
CharacterInfos PDFRealizedFont::getCharacterInfos() const
|
|
{
|
|
return m_impl->getCharacterInfos();
|
|
}
|
|
|
|
PDFRealizedFontPointer PDFRealizedFont::createRealizedFont(PDFFontPointer font, PDFReal pixelSize, PDFRenderErrorReporter* reporter)
|
|
{
|
|
PDFRealizedFontPointer result;
|
|
|
|
if (font->getFontType() == FontType::Type3)
|
|
{
|
|
result.reset(new PDFRealizedFont(new PDFRealizedType3FontImpl(font, pixelSize)));
|
|
}
|
|
else
|
|
{
|
|
std::unique_ptr<PDFRealizedFontImpl> implPtr(new PDFRealizedFontImpl());
|
|
|
|
PDFRealizedFontImpl* impl = implPtr.get();
|
|
impl->m_parentFont = font;
|
|
impl->m_pixelSize = pixelSize;
|
|
|
|
const FontDescriptor* descriptor = font->getFontDescriptor();
|
|
if (descriptor->isEmbedded())
|
|
{
|
|
PDFRealizedFontImpl::checkFreeTypeError(FT_Init_FreeType(&impl->m_library));
|
|
const QByteArray* embeddedFontData = descriptor->getEmbeddedFontData();
|
|
Q_ASSERT(embeddedFontData);
|
|
impl->m_embeddedFontData = *embeddedFontData;
|
|
|
|
// At this time, embedded font data should not be empty!
|
|
Q_ASSERT(!impl->m_embeddedFontData.isEmpty());
|
|
|
|
PDFRealizedFontImpl::checkFreeTypeError(FT_New_Memory_Face(impl->m_library, reinterpret_cast<const FT_Byte*>(impl->m_embeddedFontData.constData()), impl->m_embeddedFontData.size(), 0, &impl->m_face));
|
|
FT_Select_Charmap(impl->m_face, FT_ENCODING_UNICODE); // We try to select unicode encoding, but if it fails, we don't do anything (use glyph indices instead)
|
|
PDFRealizedFontImpl::checkFreeTypeError(FT_Set_Pixel_Sizes(impl->m_face, 0, qRound(pixelSize * PDFRealizedFontImpl::PIXEL_SIZE_MULTIPLIER)));
|
|
impl->m_isVertical = impl->m_face->face_flags & FT_FACE_FLAG_VERTICAL;
|
|
impl->m_isEmbedded = true;
|
|
result.reset(new PDFRealizedFont(implPtr.release()));
|
|
}
|
|
else
|
|
{
|
|
StandardFontType standardFontType = StandardFontType::Invalid;
|
|
if (font->getFontType() == FontType::Type1 || font->getFontType() == FontType::MMType1)
|
|
{
|
|
Q_ASSERT(dynamic_cast<const PDFType1Font*>(font.get()));
|
|
const PDFType1Font* type1Font = static_cast<const PDFType1Font*>(font.get());
|
|
standardFontType = type1Font->getStandardFontType();
|
|
}
|
|
|
|
const PDFSystemFontInfoStorage* fontStorage = PDFSystemFontInfoStorage::getInstance();
|
|
impl->m_systemFontData = fontStorage->loadFont(descriptor, standardFontType, reporter);
|
|
|
|
if (impl->m_systemFontData.isEmpty())
|
|
{
|
|
throw PDFException(PDFTranslationContext::tr("Can't load system font '%1'.").arg(QString::fromLatin1(descriptor->fontName)));
|
|
}
|
|
|
|
PDFRealizedFontImpl::checkFreeTypeError(FT_Init_FreeType(&impl->m_library));
|
|
PDFRealizedFontImpl::checkFreeTypeError(FT_New_Memory_Face(impl->m_library, reinterpret_cast<const FT_Byte*>(impl->m_systemFontData.constData()), impl->m_systemFontData.size(), 0, &impl->m_face));
|
|
FT_Select_Charmap(impl->m_face, FT_ENCODING_UNICODE); // We try to select unicode encoding, but if it fails, we don't do anything (use glyph indices instead)
|
|
PDFRealizedFontImpl::checkFreeTypeError(FT_Set_Pixel_Sizes(impl->m_face, 0, qRound(pixelSize * PDFRealizedFontImpl::PIXEL_SIZE_MULTIPLIER)));
|
|
impl->m_isVertical = impl->m_face->face_flags & FT_FACE_FLAG_VERTICAL;
|
|
impl->m_isEmbedded = false;
|
|
if (const char* postScriptName = FT_Get_Postscript_Name(impl->m_face))
|
|
{
|
|
impl->m_postScriptName = QString::fromLatin1(postScriptName);
|
|
}
|
|
result.reset(new PDFRealizedFont(implPtr.release()));
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
FontDescriptor PDFFont::readFontDescriptor(const PDFObject& fontDescriptorObject, const PDFDocument* document)
|
|
{
|
|
FontDescriptor fontDescriptor;
|
|
PDFDocumentDataLoaderDecorator fontLoader(document);
|
|
if (fontDescriptorObject.isDictionary())
|
|
{
|
|
const PDFDictionary* fontDescriptorDictionary = fontDescriptorObject.getDictionary();
|
|
fontDescriptor.fontName = fontLoader.readNameFromDictionary(fontDescriptorDictionary, "FontName");
|
|
fontDescriptor.fontFamily = fontLoader.readStringFromDictionary(fontDescriptorDictionary, "FontFamily");
|
|
|
|
constexpr const std::array<std::pair<const char*, QFont::Stretch>, 9> stretches = {
|
|
std::pair<const char*, QFont::Stretch>{ "UltraCondensed", QFont::UltraCondensed },
|
|
std::pair<const char*, QFont::Stretch>{ "ExtraCondensed", QFont::ExtraCondensed },
|
|
std::pair<const char*, QFont::Stretch>{ "Condensed", QFont::Condensed },
|
|
std::pair<const char*, QFont::Stretch>{ "SemiCondensed", QFont::SemiCondensed },
|
|
std::pair<const char*, QFont::Stretch>{ "Normal", QFont::Unstretched },
|
|
std::pair<const char*, QFont::Stretch>{ "SemiExpanded", QFont::SemiExpanded },
|
|
std::pair<const char*, QFont::Stretch>{ "Expanded", QFont::Expanded },
|
|
std::pair<const char*, QFont::Stretch>{ "ExtraExpanded", QFont::ExtraExpanded },
|
|
std::pair<const char*, QFont::Stretch>{ "UltraExpanded", QFont::UltraExpanded }
|
|
};
|
|
fontDescriptor.fontStretch = fontLoader.readEnumByName(fontDescriptorDictionary->get("FontStretch"), stretches.cbegin(), stretches.cend(), QFont::Unstretched);
|
|
fontDescriptor.fontWeight = fontLoader.readNumberFromDictionary(fontDescriptorDictionary, "FontWeight", 500);
|
|
fontDescriptor.italicAngle = fontLoader.readNumberFromDictionary(fontDescriptorDictionary, "ItalicAngle", 0.0);
|
|
fontDescriptor.ascent = fontLoader.readNumberFromDictionary(fontDescriptorDictionary, "Ascent", 0.0);
|
|
fontDescriptor.descent = fontLoader.readNumberFromDictionary(fontDescriptorDictionary, "Descent", 0.0);
|
|
fontDescriptor.leading = fontLoader.readNumberFromDictionary(fontDescriptorDictionary, "Leading", 0.0);
|
|
fontDescriptor.capHeight = fontLoader.readNumberFromDictionary(fontDescriptorDictionary, "CapHeight", 0.0);
|
|
fontDescriptor.xHeight = fontLoader.readNumberFromDictionary(fontDescriptorDictionary, "XHeight", 0.0);
|
|
fontDescriptor.stemV = fontLoader.readNumberFromDictionary(fontDescriptorDictionary, "StemV", 0.0);
|
|
fontDescriptor.stemH = fontLoader.readNumberFromDictionary(fontDescriptorDictionary, "StemH", 0.0);
|
|
fontDescriptor.avgWidth = fontLoader.readNumberFromDictionary(fontDescriptorDictionary, "AvgWidth", 0.0);
|
|
fontDescriptor.maxWidth = fontLoader.readNumberFromDictionary(fontDescriptorDictionary, "MaxWidth", 0.0);
|
|
fontDescriptor.missingWidth = fontLoader.readNumberFromDictionary(fontDescriptorDictionary, "MissingWidth", 0.0);
|
|
fontDescriptor.flags = fontLoader.readIntegerFromDictionary(fontDescriptorDictionary, "Flags", 0);
|
|
fontDescriptor.boundingBox = fontLoader.readRectangle(fontDescriptorDictionary->get("FontBBox"), QRectF());
|
|
fontDescriptor.charset = fontLoader.readStringFromDictionary(fontDescriptorDictionary, "Charset");
|
|
|
|
auto loadStream = [fontDescriptorDictionary, document](QByteArray& byteArray, const char* name)
|
|
{
|
|
if (fontDescriptorDictionary->hasKey(name))
|
|
{
|
|
const PDFObject& streamObject = document->getObject(fontDescriptorDictionary->get(name));
|
|
if (streamObject.isStream())
|
|
{
|
|
byteArray = document->getDecodedStream(streamObject.getStream());
|
|
}
|
|
}
|
|
};
|
|
loadStream(fontDescriptor.fontFile, "FontFile");
|
|
loadStream(fontDescriptor.fontFile2, "FontFile2");
|
|
loadStream(fontDescriptor.fontFile3, "FontFile3");
|
|
}
|
|
|
|
return fontDescriptor;
|
|
}
|
|
|
|
PDFFontPointer PDFFont::createFont(const PDFObject& object, const PDFDocument* document)
|
|
{
|
|
const PDFObject& dereferencedFontDictionary = document->getObject(object);
|
|
if (!dereferencedFontDictionary.isDictionary())
|
|
{
|
|
throw PDFException(PDFTranslationContext::tr("Font object must be a dictionary."));
|
|
}
|
|
|
|
const PDFDictionary* fontDictionary = dereferencedFontDictionary.getDictionary();
|
|
PDFDocumentDataLoaderDecorator fontLoader(document);
|
|
|
|
// First, determine the font subtype
|
|
constexpr const std::array fontTypes = {
|
|
std::pair<const char*, FontType>{ "Type0", FontType::Type0 },
|
|
std::pair<const char*, FontType>{ "Type1", FontType::Type1 },
|
|
std::pair<const char*, FontType>{ "TrueType", FontType::TrueType },
|
|
std::pair<const char*, FontType>{ "Type3", FontType::Type3},
|
|
std::pair<const char*, FontType>{ "MMType1", FontType::MMType1 }
|
|
};
|
|
|
|
const FontType fontType = fontLoader.readEnumByName(fontDictionary->get("Subtype"), fontTypes.cbegin(), fontTypes.cend(), FontType::Invalid);
|
|
if (fontType == FontType::Invalid)
|
|
{
|
|
throw PDFException(PDFTranslationContext::tr("Invalid font type."));
|
|
}
|
|
|
|
QByteArray name = fontLoader.readNameFromDictionary(fontDictionary, "Name");
|
|
QByteArray baseFont = fontLoader.readNameFromDictionary(fontDictionary, "BaseFont");
|
|
const PDFInteger firstChar = fontLoader.readIntegerFromDictionary(fontDictionary, "FirstChar", 0);
|
|
const PDFInteger lastChar = fontLoader.readIntegerFromDictionary(fontDictionary, "LastChar", 255);
|
|
std::vector<PDFInteger> widths = fontLoader.readIntegerArrayFromDictionary(fontDictionary, "Widths");
|
|
|
|
// Read standard font
|
|
constexpr const std::array<std::pair<const char*, StandardFontType>, 14> standardFonts = {
|
|
std::pair<const char*, StandardFontType>{ "Times-Roman", StandardFontType::TimesRoman },
|
|
std::pair<const char*, StandardFontType>{ "Times-Bold", StandardFontType::TimesRomanBold },
|
|
std::pair<const char*, StandardFontType>{ "Times-Italic", StandardFontType::TimesRomanItalics },
|
|
std::pair<const char*, StandardFontType>{ "Times-BoldItalic", StandardFontType::TimesRomanBoldItalics },
|
|
std::pair<const char*, StandardFontType>{ "Helvetica", StandardFontType::Helvetica },
|
|
std::pair<const char*, StandardFontType>{ "Helvetica-Bold", StandardFontType::HelveticaBold },
|
|
std::pair<const char*, StandardFontType>{ "Helvetica-Oblique", StandardFontType::HelveticaOblique },
|
|
std::pair<const char*, StandardFontType>{ "Helvetica-BoldOblique", StandardFontType::HelveticaBoldOblique },
|
|
std::pair<const char*, StandardFontType>{ "Courier", StandardFontType::Courier },
|
|
std::pair<const char*, StandardFontType>{ "Courier-Bold", StandardFontType::CourierBold },
|
|
std::pair<const char*, StandardFontType>{ "Courier-Oblique", StandardFontType::CourierOblique },
|
|
std::pair<const char*, StandardFontType>{ "Courier-BoldOblique", StandardFontType::CourierBoldOblique },
|
|
std::pair<const char*, StandardFontType>{ "Symbol", StandardFontType::Symbol },
|
|
std::pair<const char*, StandardFontType>{ "ZapfDingbats", StandardFontType::ZapfDingbats }
|
|
};
|
|
const StandardFontType standardFont = fontLoader.readEnumByName(fontDictionary->get("BaseFont"), standardFonts.cbegin(), standardFonts.cend(), StandardFontType::Invalid);
|
|
|
|
// Read Font Descriptor
|
|
const PDFObject& fontDescriptorObject = document->getObject(fontDictionary->get("FontDescriptor"));
|
|
FontDescriptor fontDescriptor = readFontDescriptor(fontDescriptorObject, document);
|
|
|
|
// Read Font Encoding
|
|
// The font encoding for the simple font is determined by this algorithm:
|
|
// 1) Try to use Encoding dictionary to determine base encoding
|
|
// (it can be MacRomanEncoding, MacExpertEncoding, WinAnsiEncoding or StandardEncoding)
|
|
// 2) If it is not present, then try to obtain built-in encoding from the font file (usually, this is not possible)
|
|
// 3) Use default encoding for the font depending on the font type
|
|
// - one of the 14 base fonts - use builtin encoding for the font type
|
|
// - TrueType - use WinAnsiEncoding
|
|
// - all others - use StandardEncoding
|
|
// 4) Merge with Differences, if present
|
|
// 5) Fill missing characters from StandardEncoding
|
|
// After the encoding is obtained, try to extract glyph indices for embedded font.
|
|
|
|
PDFEncoding::Encoding encoding = PDFEncoding::Encoding::Invalid;
|
|
encoding::EncodingTable simpleFontEncodingTable = { };
|
|
GlyphIndices glyphIndexArray = { };
|
|
switch (fontType)
|
|
{
|
|
case FontType::Type1:
|
|
case FontType::MMType1:
|
|
case FontType::TrueType:
|
|
{
|
|
bool hasDifferences = false;
|
|
encoding::EncodingTable differences = { };
|
|
|
|
if (fontDictionary->hasKey("Encoding"))
|
|
{
|
|
constexpr const std::array<std::pair<const char*, PDFEncoding::Encoding>, 3> encodings = {
|
|
std::pair<const char*, PDFEncoding::Encoding>{ "MacRomanEncoding", PDFEncoding::Encoding::MacRoman },
|
|
std::pair<const char*, PDFEncoding::Encoding>{ "MacExpertEncoding", PDFEncoding::Encoding::MacExpert },
|
|
std::pair<const char*, PDFEncoding::Encoding>{ "WinAnsiEncoding", PDFEncoding::Encoding::WinAnsi }
|
|
};
|
|
|
|
const PDFObject& encodingObject = document->getObject(fontDictionary->get("Encoding"));
|
|
if (encodingObject.isName())
|
|
{
|
|
// Decode name of the encoding
|
|
encoding = fontLoader.readEnumByName(encodingObject, encodings.cbegin(), encodings.cend(), PDFEncoding::Encoding::Invalid);
|
|
}
|
|
else if (encodingObject.isDictionary())
|
|
{
|
|
// Dictionary with base encoding and differences (all optional)
|
|
const PDFDictionary* encodingDictionary = encodingObject.getDictionary();
|
|
if (encodingDictionary->hasKey("BaseEncoding"))
|
|
{
|
|
encoding = fontLoader.readEnumByName(encodingDictionary->get("BaseEncoding"), encodings.cbegin(), encodings.cend(), PDFEncoding::Encoding::Invalid);
|
|
}
|
|
else
|
|
{
|
|
// We get encoding for the standard font. If we have invalid standard font,
|
|
// then we get standard encoding. So we shouldn't test it.
|
|
encoding = getEncodingForStandardFont(standardFont);
|
|
}
|
|
|
|
if (encodingDictionary->hasKey("Differences"))
|
|
{
|
|
const PDFObject& differencesArray = document->getObject(encodingDictionary->get("Differences"));
|
|
if (differencesArray.isArray())
|
|
{
|
|
hasDifferences = true;
|
|
const PDFArray* array = differencesArray.getArray();
|
|
size_t currentOffset = 0;
|
|
for (size_t i = 0, count = array->getCount(); i < count; ++i)
|
|
{
|
|
const PDFObject& item = document->getObject(array->getItem(i));
|
|
if (item.isInt())
|
|
{
|
|
currentOffset = static_cast<size_t>(item.getInteger());
|
|
}
|
|
else if (item.isName())
|
|
{
|
|
if (currentOffset >= differences.size())
|
|
{
|
|
throw PDFException(PDFTranslationContext::tr("Invalid differences in encoding entry of the font."));
|
|
}
|
|
|
|
QChar character = PDFNameToUnicode::getUnicodeUsingResolvedName(item.getString());
|
|
differences[currentOffset] = character;
|
|
|
|
++currentOffset;
|
|
}
|
|
else
|
|
{
|
|
throw PDFException(PDFTranslationContext::tr("Invalid differences in encoding entry of the font."));
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
throw PDFException(PDFTranslationContext::tr("Invalid differences in encoding entry of the font."));
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
throw PDFException(PDFTranslationContext::tr("Invalid encoding entry of the font."));
|
|
}
|
|
}
|
|
|
|
if (encoding == PDFEncoding::Encoding::Invalid)
|
|
{
|
|
// We get encoding for the standard font. If we have invalid standard font,
|
|
// then we get standard encoding. So we shouldn't test it.
|
|
encoding = getEncodingForStandardFont(standardFont);
|
|
}
|
|
|
|
if (encoding == PDFEncoding::Encoding::Invalid)
|
|
{
|
|
throw PDFException(PDFTranslationContext::tr("Invalid encoding entry of the font."));
|
|
}
|
|
|
|
simpleFontEncodingTable = *PDFEncoding::getTableForEncoding(encoding);
|
|
|
|
auto finishFont = [&]
|
|
{
|
|
// Fill in differences
|
|
if (hasDifferences)
|
|
{
|
|
for (size_t i = 0; i < differences.size(); ++i)
|
|
{
|
|
if (!differences[i].isNull())
|
|
{
|
|
simpleFontEncodingTable[i] = differences[i];
|
|
}
|
|
}
|
|
|
|
// Set the encoding to custom
|
|
encoding = PDFEncoding::Encoding::Custom;
|
|
}
|
|
|
|
// Fill in missing characters from standard encoding
|
|
const encoding::EncodingTable& standardEncoding = *PDFEncoding::getTableForEncoding(PDFEncoding::Encoding::Standard);
|
|
for (size_t i = 0; i < standardEncoding.size(); ++i)
|
|
{
|
|
if ((simpleFontEncodingTable[i].isNull() || simpleFontEncodingTable[i] == QChar(QChar::SpecialCharacter::ReplacementCharacter)) &&
|
|
(!standardEncoding[i].isNull() && standardEncoding[i] != QChar(QChar::SpecialCharacter::ReplacementCharacter)))
|
|
{
|
|
simpleFontEncodingTable[i] = standardEncoding[i];
|
|
}
|
|
}
|
|
};
|
|
|
|
if (fontDescriptor.isEmbedded())
|
|
{
|
|
// Return encoding from the embedded font
|
|
const QByteArray* embeddedFontData = fontDescriptor.getEmbeddedFontData();
|
|
Q_ASSERT(embeddedFontData);
|
|
|
|
FT_Library library;
|
|
if (!FT_Init_FreeType(&library))
|
|
{
|
|
FT_Face face;
|
|
if (!FT_New_Memory_Face(library, reinterpret_cast<const FT_Byte*>(embeddedFontData->constData()), embeddedFontData->size(), 0, &face))
|
|
{
|
|
if (FT_Has_PS_Glyph_Names(face))
|
|
{
|
|
for (FT_Int i = 0; i < face->num_charmaps; ++i)
|
|
{
|
|
FT_CharMap charMap = face->charmaps[i];
|
|
switch (charMap->encoding)
|
|
{
|
|
case FT_ENCODING_ADOBE_STANDARD:
|
|
case FT_ENCODING_ADOBE_LATIN_1:
|
|
case FT_ENCODING_ADOBE_CUSTOM:
|
|
case FT_ENCODING_ADOBE_EXPERT:
|
|
{
|
|
// Try to load data from the encoding
|
|
if (!FT_Set_Charmap(face, charMap))
|
|
{
|
|
for (size_t i = 0; i < simpleFontEncodingTable.size(); ++i)
|
|
{
|
|
FT_UInt glyphIndex = FT_Get_Char_Index(face, static_cast<FT_ULong>(i));
|
|
|
|
if (glyphIndex == 0)
|
|
{
|
|
glyphIndex = FT_Get_Char_Index(face, static_cast<FT_ULong>(i + 0xF000));
|
|
}
|
|
|
|
if (glyphIndex == 0)
|
|
{
|
|
glyphIndex = FT_Get_Char_Index(face, static_cast<FT_ULong>(i + 0xF100));
|
|
}
|
|
|
|
if (glyphIndex > 0)
|
|
{
|
|
// Fill the glyph index array
|
|
glyphIndexArray[i] = glyphIndex;
|
|
|
|
// Set mapping to unicode
|
|
char buffer[128] = { };
|
|
if (!FT_Get_Glyph_Name(face, glyphIndex, buffer, static_cast<FT_ULong>(std::size(buffer))))
|
|
{
|
|
QByteArray byteArrayBuffer(buffer);
|
|
QChar character = PDFNameToUnicode::getUnicodeForName(byteArrayBuffer);
|
|
if (character.isNull())
|
|
{
|
|
character = PDFNameToUnicode::getUnicodeForNameZapfDingbats(byteArrayBuffer);
|
|
}
|
|
if (!character.isNull())
|
|
{
|
|
encoding = PDFEncoding::Encoding::Custom;
|
|
simpleFontEncodingTable[i] = character;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
break;
|
|
}
|
|
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
else if (!FT_Select_Charmap(face, FT_ENCODING_APPLE_ROMAN))
|
|
{
|
|
// We have (1, 0) Mac Roman Encoding, which is slightly different, than Mac Roman Encoding defined
|
|
// in PDF (for 15 characters).
|
|
simpleFontEncodingTable = *PDFEncoding::getTableForEncoding(PDFEncoding::Encoding::MacOsRoman);
|
|
encoding = PDFEncoding::Encoding::Custom;
|
|
|
|
for (size_t i = 0; i < simpleFontEncodingTable.size(); ++i)
|
|
{
|
|
FT_UInt glyphIndex = FT_Get_Char_Index(face, static_cast<FT_ULong>(i));
|
|
if (glyphIndex > 0)
|
|
{
|
|
glyphIndexArray[i] = glyphIndex;
|
|
}
|
|
}
|
|
}
|
|
|
|
finishFont();
|
|
|
|
// Fill the glyph index array from unicode, if we have unicode mapping
|
|
if (!FT_Select_Charmap(face, FT_ENCODING_UNICODE))
|
|
{
|
|
for (size_t i = 0; i < simpleFontEncodingTable.size(); ++i)
|
|
{
|
|
QChar character = simpleFontEncodingTable[i];
|
|
if (!character.isNull() && character != QChar(QChar::SpecialCharacter::ReplacementCharacter))
|
|
{
|
|
const FT_UInt glyphIndex = FT_Get_Char_Index(face, character.unicode());
|
|
if (glyphIndex > 0)
|
|
{
|
|
glyphIndexArray[i] = glyphIndex;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
FT_Done_Face(face);
|
|
}
|
|
|
|
FT_Done_FreeType(library);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// Finish font - fill differences
|
|
finishFont();
|
|
}
|
|
|
|
break;
|
|
}
|
|
|
|
case FontType::Type0:
|
|
{
|
|
// This is composite font (CID keyed font)
|
|
|
|
// Load CMAP
|
|
PDFFontCMap cmap;
|
|
const PDFObject& cmapObject = document->getObject(fontDictionary->get("Encoding"));
|
|
if (cmapObject.isName())
|
|
{
|
|
cmap = PDFFontCMap::createFromName(cmapObject.getString());
|
|
}
|
|
else if (cmapObject.isStream())
|
|
{
|
|
const PDFStream* stream = cmapObject.getStream();
|
|
QByteArray decodedStream = document->getDecodedStream(stream);
|
|
cmap = PDFFontCMap::createFromData(decodedStream);
|
|
}
|
|
|
|
if (!cmap.isValid())
|
|
{
|
|
throw PDFException(PDFTranslationContext::tr("Invalid CMAP in CID-keyed font."));
|
|
}
|
|
|
|
const PDFObject& descendantFonts = document->getObject(fontDictionary->get("DescendantFonts"));
|
|
if (!descendantFonts.isArray())
|
|
{
|
|
throw PDFException(PDFTranslationContext::tr("Invalid descendant font in CID-keyed font."));
|
|
}
|
|
|
|
const PDFArray* descendantFontsArray = descendantFonts.getArray();
|
|
if (descendantFontsArray->getCount() != 1)
|
|
{
|
|
throw PDFException(PDFTranslationContext::tr("Invalid number (%1) of descendant fonts in CID-keyed font - exactly one is required.").arg(descendantFontsArray->getCount()));
|
|
}
|
|
|
|
const PDFObject& descendantFont = document->getObject(descendantFontsArray->getItem(0));
|
|
if (!descendantFont.isDictionary())
|
|
{
|
|
throw PDFException(PDFTranslationContext::tr("Invalid descendant font in CID-keyed font."));
|
|
}
|
|
|
|
const PDFDictionary* descendantFontDictionary = descendantFont.getDictionary();
|
|
|
|
const PDFObject& fontDescriptorObjectForCompositeFont = document->getObject(descendantFontDictionary->get("FontDescriptor"));
|
|
fontDescriptor = readFontDescriptor(fontDescriptorObjectForCompositeFont, document);
|
|
|
|
QByteArray cidToGidMapping;
|
|
const PDFObject& cidToGidMappingObject = document->getObject(descendantFontDictionary->get("CIDtoGIDMap"));
|
|
if (cidToGidMappingObject.isStream())
|
|
{
|
|
const PDFStream* cidToGidMappingStream = cidToGidMappingObject.getStream();
|
|
cidToGidMapping = document->getDecodedStream(cidToGidMappingStream);
|
|
}
|
|
PDFCIDtoGIDMapper cidToGidMapper(qMove(cidToGidMapping));
|
|
|
|
baseFont = fontLoader.readNameFromDictionary(descendantFontDictionary, "BaseFont");
|
|
|
|
// Read default advance
|
|
PDFReal dw = fontLoader.readNumberFromDictionary(descendantFontDictionary, "DW", 1000.0);
|
|
std::array<PDFReal, 2> dw2 = { };
|
|
fontLoader.readNumberArrayFromDictionary(descendantFontDictionary, "DW2", dw2.begin(), dw2.end());
|
|
PDFReal defaultWidth = descendantFontDictionary->hasKey("DW") ? dw : dw2.back();
|
|
|
|
// Read horizontal advances
|
|
std::unordered_map<CID, PDFReal> advances;
|
|
if (descendantFontDictionary->hasKey("W"))
|
|
{
|
|
const PDFObject& wArrayObject = document->getObject(descendantFontDictionary->get("W"));
|
|
if (wArrayObject.isArray())
|
|
{
|
|
const PDFArray* wArray = wArrayObject.getArray();
|
|
const size_t size = wArray->getCount();
|
|
|
|
for (size_t i = 0; i < size;)
|
|
{
|
|
CID startCID = fontLoader.readInteger(wArray->getItem(i++), 0);
|
|
const PDFObject& arrayOrCID = document->getObject(wArray->getItem(i++));
|
|
|
|
if (arrayOrCID.isInt())
|
|
{
|
|
CID endCID = arrayOrCID.getInteger();
|
|
PDFReal width = fontLoader.readInteger(wArray->getItem(i++), 0);
|
|
for (CID currentCID = startCID; currentCID <= endCID; ++currentCID)
|
|
{
|
|
advances[currentCID] = width;
|
|
}
|
|
}
|
|
else if (arrayOrCID.isArray())
|
|
{
|
|
const PDFArray* widthArray = arrayOrCID.getArray();
|
|
const size_t widthArraySize = widthArray->getCount();
|
|
for (size_t widthArrayIndex = 0; widthArrayIndex < widthArraySize; ++widthArrayIndex)
|
|
{
|
|
PDFReal width = fontLoader.readNumber(widthArray->getItem(widthArrayIndex), 0);
|
|
advances[startCID + static_cast<CID>(widthArrayIndex)] = width;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
PDFFontCMap toUnicodeCMap;
|
|
const PDFObject& toUnicode = document->getObject(fontDictionary->get("ToUnicode"));
|
|
if (toUnicode.isName())
|
|
{
|
|
toUnicodeCMap = PDFFontCMap::createFromName(toUnicode.getString());
|
|
}
|
|
else if (toUnicode.isStream())
|
|
{
|
|
const PDFStream* stream = toUnicode.getStream();
|
|
QByteArray decodedStream = document->getDecodedStream(stream);
|
|
toUnicodeCMap = PDFFontCMap::createFromData(decodedStream);
|
|
}
|
|
|
|
return PDFFontPointer(new PDFType0Font(qMove(fontDescriptor), qMove(cmap), qMove(toUnicodeCMap), qMove(cidToGidMapper), defaultWidth, qMove(advances)));
|
|
}
|
|
|
|
case FontType::Type3:
|
|
{
|
|
// Read the font matrix
|
|
std::vector<PDFReal> fontMatrixValues = fontLoader.readNumberArrayFromDictionary(fontDictionary, "FontMatrix");
|
|
|
|
if (fontMatrixValues.size() != 6)
|
|
{
|
|
throw PDFException(PDFTranslationContext::tr("Invalid Type 3 font matrix."));
|
|
}
|
|
QMatrix fontMatrix(fontMatrixValues[0], fontMatrixValues[1], fontMatrixValues[2], fontMatrixValues[3], fontMatrixValues[4], fontMatrixValues[5]);
|
|
|
|
PDFObject charProcs = document->getObject(fontDictionary->get("CharProcs"));
|
|
if (!charProcs.isDictionary())
|
|
{
|
|
throw PDFException(PDFTranslationContext::tr("Invalid Type 3 font character content streams."));
|
|
}
|
|
const PDFDictionary* charProcsDictionary = charProcs.getDictionary();
|
|
|
|
PDFInteger firstChar = fontLoader.readIntegerFromDictionary(fontDictionary, "FirstChar", -1);
|
|
PDFInteger lastChar = fontLoader.readIntegerFromDictionary(fontDictionary, "LastChar", -1);
|
|
|
|
if (firstChar < 0 || lastChar > 255 || firstChar > lastChar)
|
|
{
|
|
throw PDFException(PDFTranslationContext::tr("Invalid Type 3 font character range (from %1 to %2).").arg(firstChar).arg(lastChar));
|
|
}
|
|
|
|
const PDFObject& encoding = document->getObject(fontDictionary->get("Encoding"));
|
|
if (!encoding.isDictionary())
|
|
{
|
|
throw PDFException(PDFTranslationContext::tr("Invalid Type 3 font encoding."));
|
|
}
|
|
|
|
const PDFDictionary* encodingDictionary = encoding.getDictionary();
|
|
const PDFObject& differences = document->getObject(encodingDictionary->get("Differences"));
|
|
if (!differences.isArray())
|
|
{
|
|
throw PDFException(PDFTranslationContext::tr("Invalid Type 3 font encoding."));
|
|
}
|
|
|
|
std::map<int, QByteArray> characterContentStreams;
|
|
|
|
const PDFArray* differencesArray = differences.getArray();
|
|
size_t currentOffset = 0;
|
|
for (size_t i = 0, count = differencesArray->getCount(); i < count; ++i)
|
|
{
|
|
const PDFObject& item = document->getObject(differencesArray->getItem(i));
|
|
if (item.isInt())
|
|
{
|
|
currentOffset = static_cast<size_t>(item.getInteger());
|
|
}
|
|
else if (item.isName())
|
|
{
|
|
if (currentOffset > 255)
|
|
{
|
|
throw PDFException(PDFTranslationContext::tr("Invalid differences in encoding entry of type 3 font."));
|
|
}
|
|
|
|
QByteArray characterName = item.getString();
|
|
const PDFObject& characterContentStreamObject = document->getObject(charProcsDictionary->get(characterName));
|
|
if (characterContentStreamObject.isStream())
|
|
{
|
|
QByteArray contentStream = document->getDecodedStream(characterContentStreamObject.getStream());
|
|
characterContentStreams[static_cast<int>(currentOffset)] = qMove(contentStream);
|
|
}
|
|
|
|
++currentOffset;
|
|
}
|
|
else
|
|
{
|
|
throw PDFException(PDFTranslationContext::tr("Invalid differences in encoding entry of type 3 font."));
|
|
}
|
|
}
|
|
|
|
PDFFontCMap toUnicodeCMap;
|
|
const PDFObject& toUnicode = document->getObject(fontDictionary->get("ToUnicode"));
|
|
if (toUnicode.isName())
|
|
{
|
|
toUnicodeCMap = PDFFontCMap::createFromName(toUnicode.getString());
|
|
}
|
|
else if (toUnicode.isStream())
|
|
{
|
|
const PDFStream* stream = toUnicode.getStream();
|
|
QByteArray decodedStream = document->getDecodedStream(stream);
|
|
toUnicodeCMap = PDFFontCMap::createFromData(decodedStream);
|
|
}
|
|
|
|
std::vector<PDFReal> widths = fontLoader.readNumberArrayFromDictionary(fontDictionary, "Widths");
|
|
return PDFFontPointer(new PDFType3Font(qMove(fontDescriptor), firstChar, lastChar, fontMatrix, qMove(characterContentStreams), qMove(widths), document->getObject(fontDictionary->get("Resources")), qMove(toUnicodeCMap)));
|
|
}
|
|
|
|
default:
|
|
{
|
|
Q_ASSERT(false);
|
|
break;
|
|
}
|
|
}
|
|
|
|
switch (fontType)
|
|
{
|
|
case FontType::Type1:
|
|
case FontType::MMType1:
|
|
return PDFFontPointer(new PDFType1Font(fontType, qMove(fontDescriptor), qMove(name), qMove(baseFont), firstChar, lastChar, qMove(widths), encoding, simpleFontEncodingTable, standardFont, glyphIndexArray));
|
|
|
|
case FontType::TrueType:
|
|
return PDFFontPointer(new PDFTrueTypeFont(qMove(fontDescriptor), qMove(name), qMove(baseFont), firstChar, lastChar, qMove(widths), encoding, simpleFontEncodingTable, glyphIndexArray));
|
|
|
|
default:
|
|
{
|
|
Q_ASSERT(false);
|
|
break;
|
|
}
|
|
}
|
|
|
|
return PDFFontPointer();
|
|
}
|
|
|
|
PDFSimpleFont::PDFSimpleFont(FontDescriptor fontDescriptor,
|
|
QByteArray name,
|
|
QByteArray baseFont,
|
|
PDFInteger firstChar,
|
|
PDFInteger lastChar,
|
|
std::vector<PDFInteger> widths,
|
|
PDFEncoding::Encoding encodingType,
|
|
encoding::EncodingTable encoding,
|
|
GlyphIndices glyphIndices) :
|
|
PDFFont(qMove(fontDescriptor)),
|
|
m_name(qMove(name)),
|
|
m_baseFont(qMove(baseFont)),
|
|
m_firstChar(firstChar),
|
|
m_lastChar(lastChar),
|
|
m_widths(qMove(widths)),
|
|
m_encodingType(encodingType),
|
|
m_encoding(encoding),
|
|
m_glyphIndices(glyphIndices)
|
|
{
|
|
|
|
}
|
|
|
|
PDFInteger PDFSimpleFont::getGlyphAdvance(size_t index) const
|
|
{
|
|
const size_t min = m_firstChar;
|
|
const size_t max = m_lastChar;
|
|
|
|
if (index >= min && index <= max)
|
|
{
|
|
const size_t adjustedIndex = index - min;
|
|
if (adjustedIndex < m_widths.size())
|
|
{
|
|
return m_widths[adjustedIndex];
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void PDFSimpleFont::dumpFontToTreeItem(QTreeWidgetItem* item) const
|
|
{
|
|
BaseClass::dumpFontToTreeItem(item);
|
|
|
|
QString encodingTypeString;
|
|
switch (m_encodingType)
|
|
{
|
|
case PDFEncoding::Encoding::Standard:
|
|
encodingTypeString = PDFTranslationContext::tr("Standard");
|
|
break;
|
|
|
|
case PDFEncoding::Encoding::MacRoman:
|
|
encodingTypeString = PDFTranslationContext::tr("Mac Roman");
|
|
break;
|
|
|
|
case PDFEncoding::Encoding::WinAnsi:
|
|
encodingTypeString = PDFTranslationContext::tr("Win Ansi");
|
|
break;
|
|
|
|
case PDFEncoding::Encoding::PDFDoc:
|
|
encodingTypeString = PDFTranslationContext::tr("PDF Doc");
|
|
break;
|
|
|
|
case PDFEncoding::Encoding::MacExpert:
|
|
encodingTypeString = PDFTranslationContext::tr("Mac Expert");
|
|
break;
|
|
|
|
case PDFEncoding::Encoding::Symbol:
|
|
encodingTypeString = PDFTranslationContext::tr("Symbol");
|
|
break;
|
|
|
|
case PDFEncoding::Encoding::ZapfDingbats:
|
|
encodingTypeString = PDFTranslationContext::tr("Zapf Dingbats");
|
|
break;
|
|
|
|
case PDFEncoding::Encoding::MacOsRoman:
|
|
encodingTypeString = PDFTranslationContext::tr("Mac OS Roman");
|
|
break;
|
|
|
|
case PDFEncoding::Encoding::Custom:
|
|
encodingTypeString = PDFTranslationContext::tr("Custom");
|
|
break;
|
|
|
|
default:
|
|
{
|
|
Q_ASSERT(false);
|
|
break;
|
|
}
|
|
}
|
|
|
|
new QTreeWidgetItem(item, { PDFTranslationContext::tr("Encoding"), encodingTypeString });
|
|
}
|
|
|
|
PDFType1Font::PDFType1Font(FontType fontType,
|
|
FontDescriptor fontDescriptor,
|
|
QByteArray name,
|
|
QByteArray baseFont,
|
|
PDFInteger firstChar,
|
|
PDFInteger lastChar,
|
|
std::vector<PDFInteger> widths,
|
|
PDFEncoding::Encoding encodingType,
|
|
encoding::EncodingTable encoding,
|
|
StandardFontType standardFontType,
|
|
GlyphIndices glyphIndices) :
|
|
PDFSimpleFont(qMove(fontDescriptor), qMove(name), qMove(baseFont), firstChar, lastChar, qMove(widths), encodingType, encoding, glyphIndices),
|
|
m_fontType(fontType),
|
|
m_standardFontType(standardFontType)
|
|
{
|
|
|
|
}
|
|
|
|
FontType PDFType1Font::getFontType() const
|
|
{
|
|
return m_fontType;
|
|
}
|
|
|
|
void PDFType1Font::dumpFontToTreeItem(QTreeWidgetItem* item) const
|
|
{
|
|
BaseClass::dumpFontToTreeItem(item);
|
|
|
|
if (m_standardFontType != StandardFontType::Invalid)
|
|
{
|
|
QString standardFontTypeString;
|
|
switch (m_standardFontType)
|
|
{
|
|
case StandardFontType::TimesRoman:
|
|
case StandardFontType::TimesRomanBold:
|
|
case StandardFontType::TimesRomanItalics:
|
|
case StandardFontType::TimesRomanBoldItalics:
|
|
standardFontTypeString = PDFTranslationContext::tr("Times Roman");
|
|
break;
|
|
|
|
case StandardFontType::Helvetica:
|
|
case StandardFontType::HelveticaBold:
|
|
case StandardFontType::HelveticaOblique:
|
|
case StandardFontType::HelveticaBoldOblique:
|
|
standardFontTypeString = PDFTranslationContext::tr("Helvetica");
|
|
break;
|
|
|
|
case StandardFontType::Courier:
|
|
case StandardFontType::CourierBold:
|
|
case StandardFontType::CourierOblique:
|
|
case StandardFontType::CourierBoldOblique:
|
|
standardFontTypeString = PDFTranslationContext::tr("Courier");
|
|
break;
|
|
|
|
case StandardFontType::Symbol:
|
|
standardFontTypeString = PDFTranslationContext::tr("Symbol");
|
|
break;
|
|
|
|
case StandardFontType::ZapfDingbats:
|
|
standardFontTypeString = PDFTranslationContext::tr("Zapf Dingbats");
|
|
break;
|
|
|
|
default:
|
|
Q_ASSERT(false);
|
|
break;
|
|
}
|
|
|
|
new QTreeWidgetItem(item, { PDFTranslationContext::tr("Standard font"), standardFontTypeString });
|
|
}
|
|
}
|
|
|
|
FontType PDFTrueTypeFont::getFontType() const
|
|
{
|
|
return FontType::TrueType;
|
|
}
|
|
|
|
void PDFFontCache::setDocument(const PDFModifiedDocument& document)
|
|
{
|
|
QMutexLocker lock(&m_mutex);
|
|
if (m_document != document)
|
|
{
|
|
m_document = document;
|
|
|
|
// Jakub Melka: If document has not reset flag, then fonts of the
|
|
// document remains the same. So it is not needed to clear font cache.
|
|
if (document.hasReset())
|
|
{
|
|
m_fontCache.clear();
|
|
m_realizedFontCache.clear();
|
|
}
|
|
}
|
|
}
|
|
|
|
PDFFontPointer PDFFontCache::getFont(const PDFObject& fontObject) const
|
|
{
|
|
if (fontObject.isReference())
|
|
{
|
|
// Font is object reference. Look in the cache, if we have it, then return it.
|
|
|
|
QMutexLocker lock(&m_mutex);
|
|
PDFObjectReference reference = fontObject.getReference();
|
|
|
|
auto it = m_fontCache.find(reference);
|
|
if (it == m_fontCache.cend())
|
|
{
|
|
// We must create the font
|
|
PDFFontPointer font = PDFFont::createFont(fontObject, m_document);
|
|
|
|
if (m_fontCacheShrinkDisabledObjects.empty() && m_fontCache.size() >= m_fontCacheLimit)
|
|
{
|
|
// We have exceeded the cache limit. Clear the cache.
|
|
m_fontCache.clear();
|
|
}
|
|
|
|
it = m_fontCache.insert(std::make_pair(reference, qMove(font))).first;
|
|
}
|
|
return it->second;
|
|
}
|
|
else
|
|
{
|
|
// Object is not a reference. Create font directly and return it.
|
|
return PDFFont::createFont(fontObject, m_document);
|
|
}
|
|
}
|
|
|
|
PDFRealizedFontPointer PDFFontCache::getRealizedFont(const PDFFontPointer& font, PDFReal size, PDFRenderErrorReporter* reporter) const
|
|
{
|
|
Q_ASSERT(font);
|
|
|
|
QMutexLocker lock(&m_mutex);
|
|
auto it = m_realizedFontCache.find(std::make_pair(font, size));
|
|
if (it == m_realizedFontCache.cend())
|
|
{
|
|
// We must create the realized font
|
|
PDFRealizedFontPointer realizedFont = PDFRealizedFont::createRealizedFont(font, size, reporter);
|
|
|
|
if (m_fontCacheShrinkDisabledObjects.empty() && m_realizedFontCache.size() >= m_realizedFontCacheLimit)
|
|
{
|
|
m_realizedFontCache.clear();
|
|
}
|
|
|
|
it = m_realizedFontCache.insert(std::make_pair(std::make_pair(font, size), qMove(realizedFont))).first;
|
|
}
|
|
|
|
return it->second;
|
|
}
|
|
|
|
void PDFFontCache::setCacheShrinkEnabled(const void* source, bool enabled)
|
|
{
|
|
QMutexLocker lock(&m_mutex);
|
|
if (enabled)
|
|
{
|
|
m_fontCacheShrinkDisabledObjects.erase(source);
|
|
lock.unlock();
|
|
shrink();
|
|
}
|
|
else
|
|
{
|
|
m_fontCacheShrinkDisabledObjects.insert(source);
|
|
}
|
|
}
|
|
|
|
void PDFFontCache::setCacheLimits(int fontCacheLimit, int instancedFontCacheLimit)
|
|
{
|
|
if (m_fontCacheLimit != fontCacheLimit || m_realizedFontCacheLimit != instancedFontCacheLimit)
|
|
{
|
|
m_fontCacheLimit = fontCacheLimit;
|
|
m_realizedFontCacheLimit = instancedFontCacheLimit;
|
|
shrink();
|
|
}
|
|
}
|
|
|
|
void PDFFontCache::shrink()
|
|
{
|
|
QMutexLocker lock(&m_mutex);
|
|
if (m_fontCacheShrinkDisabledObjects.empty())
|
|
{
|
|
if (m_fontCache.size() >= m_fontCacheLimit)
|
|
{
|
|
m_fontCache.clear();
|
|
}
|
|
if (m_realizedFontCache.size() >= m_realizedFontCacheLimit)
|
|
{
|
|
m_realizedFontCache.clear();
|
|
}
|
|
}
|
|
}
|
|
|
|
const QByteArray* FontDescriptor::getEmbeddedFontData() const
|
|
{
|
|
if (!fontFile.isEmpty())
|
|
{
|
|
return &fontFile;
|
|
}
|
|
else if (!fontFile2.isEmpty())
|
|
{
|
|
return &fontFile2;
|
|
}
|
|
else if (!fontFile3.isEmpty())
|
|
{
|
|
return &fontFile3;
|
|
}
|
|
|
|
return nullptr;
|
|
}
|
|
|
|
PDFFontCMap PDFFontCMap::createFromName(const QByteArray& name)
|
|
{
|
|
QFile file(QString(":/cmaps/%1").arg(QString::fromLatin1(name)));
|
|
if (file.exists())
|
|
{
|
|
QByteArray data;
|
|
if (file.open(QFile::ReadOnly))
|
|
{
|
|
data = file.readAll();
|
|
file.close();
|
|
}
|
|
|
|
return createFromData(data);
|
|
}
|
|
|
|
throw PDFException(PDFTranslationContext::tr("Can't load CID font mapping named '%1'.").arg(QString::fromLatin1(name)));
|
|
return PDFFontCMap();
|
|
}
|
|
|
|
PDFFontCMap PDFFontCMap::createFromData(const QByteArray& data)
|
|
{
|
|
Entries entries;
|
|
entries.reserve(1024); // Arbitrary number, we have enough memory, better than perform reallocation each time
|
|
|
|
std::vector<PDFFontCMap> additionalMappings;
|
|
PDFLexicalAnalyzer parser(data.constBegin(), data.constEnd());
|
|
|
|
bool vertical = false;
|
|
PDFLexicalAnalyzer::Token previousToken;
|
|
while (!parser.isAtEnd())
|
|
{
|
|
PDFLexicalAnalyzer::Token token = parser.fetch();
|
|
|
|
if (token.type == PDFLexicalAnalyzer::TokenType::Name && token.data.toByteArray() == "WMode")
|
|
{
|
|
PDFLexicalAnalyzer::Token valueToken = parser.fetch();
|
|
vertical = valueToken.type == PDFLexicalAnalyzer::TokenType::Integer && valueToken.data.value<PDFInteger>() == 1;
|
|
continue;
|
|
}
|
|
|
|
auto fetchCode = [] (const PDFLexicalAnalyzer::Token& currentToken) -> std::pair<unsigned int, unsigned int>
|
|
{
|
|
if (currentToken.type == PDFLexicalAnalyzer::TokenType::String)
|
|
{
|
|
QByteArray byteArray = currentToken.data.toByteArray();
|
|
|
|
unsigned int codeValue = 0;
|
|
for (int i = 0; i < byteArray.size(); ++i)
|
|
{
|
|
codeValue = (codeValue << 8) + static_cast<unsigned char>(byteArray[i]);
|
|
}
|
|
|
|
return std::make_pair(codeValue, byteArray.size());
|
|
}
|
|
|
|
throw PDFException(PDFTranslationContext::tr("Can't fetch code from CMap definition."));
|
|
return std::pair<unsigned int, unsigned int>();
|
|
};
|
|
|
|
auto fetchCID = [&parser] (const PDFLexicalAnalyzer::Token& currentToken) -> CID
|
|
{
|
|
if (currentToken.type == PDFLexicalAnalyzer::TokenType::Integer)
|
|
{
|
|
return currentToken.data.value<PDFInteger>();
|
|
}
|
|
|
|
throw PDFException(PDFTranslationContext::tr("Can't fetch CID from CMap definition."));
|
|
return 0;
|
|
};
|
|
|
|
auto fetchUnicode = [&parser](const PDFLexicalAnalyzer::Token& currentToken) -> CID
|
|
{
|
|
if (currentToken.type == PDFLexicalAnalyzer::TokenType::String)
|
|
{
|
|
QByteArray byteArray = currentToken.data.toByteArray();
|
|
|
|
if (byteArray.size() == 2)
|
|
{
|
|
CID unicodeValue = 0;
|
|
for (int i = 0; i < byteArray.size(); ++i)
|
|
{
|
|
unicodeValue = (unicodeValue << 8) + static_cast<unsigned char>(byteArray[i]);
|
|
}
|
|
return unicodeValue;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
};
|
|
|
|
if (token.type == PDFLexicalAnalyzer::TokenType::Command)
|
|
{
|
|
QByteArray command = token.data.toByteArray();
|
|
if (command == "usecmap")
|
|
{
|
|
if (previousToken.type == PDFLexicalAnalyzer::TokenType::Name)
|
|
{
|
|
additionalMappings.emplace_back(createFromName(previousToken.data.toByteArray()));
|
|
}
|
|
else
|
|
{
|
|
throw PDFException(PDFTranslationContext::tr("Can't use cmap inside cmap file."));
|
|
}
|
|
}
|
|
else if (command == "beginbfrange")
|
|
{
|
|
PDFLexicalAnalyzer::Token token1 = parser.fetch();
|
|
|
|
if (token1.type == PDFLexicalAnalyzer::TokenType::Command &&
|
|
token1.data.toByteArray() == "endbfrange")
|
|
{
|
|
break;
|
|
}
|
|
|
|
PDFLexicalAnalyzer::Token token2 = parser.fetch();
|
|
PDFLexicalAnalyzer::Token token3 = parser.fetch();
|
|
|
|
std::pair<unsigned int, unsigned int> from = fetchCode(token1);
|
|
std::pair<unsigned int, unsigned int> to = fetchCode(token2);
|
|
CID cid = fetchUnicode(token3);
|
|
|
|
entries.emplace_back(from.first, to.first, qMax(from.second, to.second), cid);
|
|
}
|
|
else if (command == "begincidrange")
|
|
{
|
|
while (true)
|
|
{
|
|
PDFLexicalAnalyzer::Token token1 = parser.fetch();
|
|
|
|
if (token1.type == PDFLexicalAnalyzer::TokenType::Command &&
|
|
token1.data.toByteArray() == "endcidrange")
|
|
{
|
|
break;
|
|
}
|
|
|
|
PDFLexicalAnalyzer::Token token2 = parser.fetch();
|
|
PDFLexicalAnalyzer::Token token3 = parser.fetch();
|
|
|
|
std::pair<unsigned int, unsigned int> from = fetchCode(token1);
|
|
std::pair<unsigned int, unsigned int> to = fetchCode(token2);
|
|
CID cid = fetchCID(token3);
|
|
|
|
entries.emplace_back(from.first, to.first, qMax(from.second, to.second), cid);
|
|
}
|
|
}
|
|
else if (command == "begincidchar")
|
|
{
|
|
while (true)
|
|
{
|
|
PDFLexicalAnalyzer::Token token1 = parser.fetch();
|
|
|
|
if (token1.type == PDFLexicalAnalyzer::TokenType::Command &&
|
|
token1.data.toByteArray() == "endcidchar")
|
|
{
|
|
break;
|
|
}
|
|
|
|
PDFLexicalAnalyzer::Token token2 = parser.fetch();
|
|
|
|
std::pair<unsigned int, unsigned int> code = fetchCode(token1);
|
|
CID cid = fetchCID(token2);
|
|
|
|
entries.emplace_back(code.first, code.first, code.second, cid);
|
|
}
|
|
}
|
|
else if (command == "beginbfchar")
|
|
{
|
|
while (true)
|
|
{
|
|
PDFLexicalAnalyzer::Token token1 = parser.fetch();
|
|
|
|
if (token1.type == PDFLexicalAnalyzer::TokenType::Command &&
|
|
token1.data.toByteArray() == "endbfchar")
|
|
{
|
|
break;
|
|
}
|
|
|
|
PDFLexicalAnalyzer::Token token2 = parser.fetch();
|
|
|
|
std::pair<unsigned int, unsigned int> code = fetchCode(token1);
|
|
CID cid = fetchUnicode(token2);
|
|
|
|
entries.emplace_back(code.first, code.first, code.second, cid);
|
|
}
|
|
}
|
|
}
|
|
|
|
previousToken = token;
|
|
}
|
|
|
|
std::sort(entries.begin(), entries.end());
|
|
entries = optimize(entries);
|
|
|
|
if (!additionalMappings.empty())
|
|
{
|
|
for (const PDFFontCMap& map : additionalMappings)
|
|
{
|
|
entries.insert(entries.cend(), map.m_entries.cbegin(), map.m_entries.cend());
|
|
}
|
|
}
|
|
|
|
return PDFFontCMap(qMove(entries), vertical);
|
|
}
|
|
|
|
QByteArray PDFFontCMap::serialize() const
|
|
{
|
|
QByteArray result;
|
|
|
|
{
|
|
QDataStream stream(&result, QIODevice::WriteOnly);
|
|
stream << m_maxKeyLength;
|
|
stream << m_vertical;
|
|
stream << m_entries.size();
|
|
for (const Entry& entry : m_entries)
|
|
{
|
|
stream << entry.from;
|
|
stream << entry.to;
|
|
stream << entry.byteCount;
|
|
stream << entry.cid;
|
|
}
|
|
}
|
|
|
|
return qCompress(result, 9);
|
|
}
|
|
|
|
PDFFontCMap PDFFontCMap::deserialize(const QByteArray& byteArray)
|
|
{
|
|
PDFFontCMap result;
|
|
QByteArray decompressed = qUncompress(byteArray);
|
|
QDataStream stream(&decompressed, QIODevice::ReadOnly);
|
|
stream >> result.m_maxKeyLength;
|
|
stream >> result.m_vertical;
|
|
|
|
Entries::size_type size = 0;
|
|
stream >> size;
|
|
result.m_entries.reserve(size);
|
|
for (Entries::size_type i = 0; i < size; ++i)
|
|
{
|
|
Entry entry;
|
|
stream >> entry.from;
|
|
stream >> entry.to;
|
|
stream >> entry.byteCount;
|
|
stream >> entry.cid;
|
|
result.m_entries.push_back(entry);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
std::vector<CID> PDFFontCMap::interpret(const QByteArray& byteArray) const
|
|
{
|
|
std::vector<CID> result;
|
|
result.reserve(byteArray.size() / m_maxKeyLength);
|
|
|
|
unsigned int value = 0;
|
|
int scannedBytes = 0;
|
|
|
|
for (int i = 0, size = byteArray.size(); i < size; ++i)
|
|
{
|
|
value = (value << 8) + static_cast<unsigned char>(byteArray[i]);
|
|
++scannedBytes;
|
|
|
|
// Find suitable mapping
|
|
auto it = std::find_if(m_entries.cbegin(), m_entries.cend(), [value, scannedBytes](const Entry& entry) { return entry.from <= value && entry.to >= value && entry.byteCount == scannedBytes; });
|
|
if (it != m_entries.cend())
|
|
{
|
|
const Entry& entry = *it;
|
|
const CID cid = value - entry.from + entry.cid;
|
|
result.push_back(cid);
|
|
|
|
value = 0;
|
|
scannedBytes = 0;
|
|
}
|
|
else if (scannedBytes == m_maxKeyLength)
|
|
{
|
|
// This means error occured - fill empty CID
|
|
result.push_back(0);
|
|
value = 0;
|
|
scannedBytes = 0;
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
QChar PDFFontCMap::getToUnicode(CID cid) const
|
|
{
|
|
if (isValid())
|
|
{
|
|
auto it = std::find_if(m_entries.cbegin(), m_entries.cend(), [cid](const Entry& entry) { return entry.from <= cid && entry.to >= cid; });
|
|
if (it != m_entries.cend())
|
|
{
|
|
const Entry& entry = *it;
|
|
const CID unicodeCID = cid - entry.from + entry.cid;
|
|
return QChar(unicodeCID);
|
|
}
|
|
}
|
|
|
|
return QChar();
|
|
}
|
|
|
|
PDFFontCMap::PDFFontCMap(Entries&& entries, bool vertical) :
|
|
m_entries(qMove(entries)),
|
|
m_maxKeyLength(0),
|
|
m_vertical(vertical)
|
|
{
|
|
m_maxKeyLength = std::accumulate(m_entries.cbegin(), m_entries.cend(), 0, [](unsigned int a, const Entry& b) { return qMax(a, b.byteCount); });
|
|
}
|
|
|
|
PDFFontCMap::Entries PDFFontCMap::optimize(const PDFFontCMap::Entries& entries)
|
|
{
|
|
Entries result;
|
|
result.reserve(entries.size());
|
|
|
|
if (!entries.empty())
|
|
{
|
|
Entry current = entries.front();
|
|
for (size_t i = 1, count = entries.size(); i < count; ++i)
|
|
{
|
|
Entry toMerge = entries[i];
|
|
|
|
if (current.canMerge(toMerge))
|
|
{
|
|
current = current.merge(toMerge);
|
|
}
|
|
else
|
|
{
|
|
result.emplace_back(current);
|
|
current = toMerge;
|
|
}
|
|
}
|
|
result.emplace_back(current);
|
|
}
|
|
|
|
result.shrink_to_fit();
|
|
return result;
|
|
}
|
|
|
|
PDFFontCMapRepository* PDFFontCMapRepository::getInstance()
|
|
{
|
|
static PDFFontCMapRepository repository;
|
|
return &repository;
|
|
}
|
|
|
|
void PDFFontCMapRepository::saveToFile(const QString& fileName) const
|
|
{
|
|
QFile file(fileName);
|
|
if (file.open(QFile::WriteOnly | QFile::Truncate))
|
|
{
|
|
size_t size = m_cmaps.size();
|
|
|
|
{
|
|
QDataStream stream(&file);
|
|
stream << size;
|
|
for (const auto& item : m_cmaps)
|
|
{
|
|
stream << item.first;
|
|
stream << item.second;
|
|
}
|
|
}
|
|
|
|
file.close();
|
|
}
|
|
}
|
|
|
|
bool PDFFontCMapRepository::loadFromFile(const QString& fileName)
|
|
{
|
|
QFile file(fileName);
|
|
if (file.open(QFile::ReadOnly))
|
|
{
|
|
{
|
|
QDataStream stream(&file);
|
|
size_t size = 0;
|
|
stream >> size;
|
|
for (size_t i = 0; i < size; ++i)
|
|
{
|
|
QByteArray key;
|
|
QByteArray value;
|
|
stream >> key;
|
|
stream >> value;
|
|
m_cmaps[qMove(key)] = qMove(value);
|
|
}
|
|
}
|
|
|
|
file.close();
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
PDFFontCMapRepository::PDFFontCMapRepository()
|
|
{
|
|
|
|
}
|
|
|
|
PDFReal PDFType0Font::getGlyphAdvance(CID cid) const
|
|
{
|
|
auto it = m_advances.find(cid);
|
|
if (it != m_advances.cend())
|
|
{
|
|
return it->second;
|
|
}
|
|
|
|
return m_defaultAdvance;
|
|
}
|
|
|
|
PDFType3Font::PDFType3Font(FontDescriptor fontDescriptor,
|
|
int firstCharacterIndex,
|
|
int lastCharacterIndex,
|
|
QMatrix fontMatrix,
|
|
std::map<int, QByteArray>&& characterContentStreams,
|
|
std::vector<double>&& widths,
|
|
const PDFObject& resources,
|
|
PDFFontCMap toUnicode) :
|
|
PDFFont(qMove(fontDescriptor)),
|
|
m_firstCharacterIndex(firstCharacterIndex),
|
|
m_lastCharacterIndex(lastCharacterIndex),
|
|
m_fontMatrix(fontMatrix),
|
|
m_characterContentStreams(qMove(characterContentStreams)),
|
|
m_widths(qMove(widths)),
|
|
m_resources(resources),
|
|
m_toUnicode(qMove(toUnicode))
|
|
{
|
|
|
|
}
|
|
|
|
FontType PDFType3Font::getFontType() const
|
|
{
|
|
return FontType::Type3;
|
|
}
|
|
|
|
void PDFType3Font::dumpFontToTreeItem(QTreeWidgetItem* item) const
|
|
{
|
|
new QTreeWidgetItem(item, { PDFTranslationContext::tr("Character count"), QString::number(m_characterContentStreams.size()) });
|
|
}
|
|
|
|
double PDFType3Font::getWidth(int characterIndex) const
|
|
{
|
|
if (characterIndex >= m_firstCharacterIndex && characterIndex <= m_lastCharacterIndex)
|
|
{
|
|
size_t index = characterIndex - m_firstCharacterIndex;
|
|
if (index < m_widths.size())
|
|
{
|
|
return m_widths[index];
|
|
}
|
|
}
|
|
|
|
return 0.0;
|
|
}
|
|
|
|
const QByteArray* PDFType3Font::getContentStream(int characterIndex) const
|
|
{
|
|
auto it = m_characterContentStreams.find(characterIndex);
|
|
if (it != m_characterContentStreams.cend())
|
|
{
|
|
return &it->second;
|
|
}
|
|
|
|
return nullptr;
|
|
}
|
|
|
|
void PDFRealizedType3FontImpl::fillTextSequence(const QByteArray& byteArray, TextSequence& textSequence, PDFRenderErrorReporter* reporter)
|
|
{
|
|
Q_ASSERT(dynamic_cast<const PDFType3Font*>(m_parentFont.get()));
|
|
const PDFType3Font* parentFont = static_cast<const PDFType3Font*>(m_parentFont.get());
|
|
|
|
textSequence.items.reserve(byteArray.size());
|
|
for (int i = 0, characterCount = byteArray.size(); i < characterCount; ++i)
|
|
{
|
|
int index = static_cast<uint8_t>(byteArray[i]);
|
|
const QByteArray* contentStream = parentFont->getContentStream(index);
|
|
QChar character = parentFont->getUnicode(index);
|
|
const double width = parentFont->getWidth(index);
|
|
|
|
if (contentStream)
|
|
{
|
|
textSequence.items.emplace_back(contentStream, character, width);
|
|
}
|
|
else
|
|
{
|
|
// Report error, and add advance, if we have it
|
|
reporter->reportRenderError(RenderErrorType::Warning, PDFTranslationContext::tr("Content stream for type 3 font character code '%1' not found.").arg(index));
|
|
|
|
if (width > 0.0)
|
|
{
|
|
textSequence.items.emplace_back(width);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
bool PDFRealizedType3FontImpl::isHorizontalWritingSystem() const
|
|
{
|
|
return true;
|
|
}
|
|
|
|
CharacterInfos PDFRealizedType3FontImpl::getCharacterInfos() const
|
|
{
|
|
CharacterInfos result;
|
|
|
|
Q_ASSERT(dynamic_cast<const PDFType3Font*>(m_parentFont.get()));
|
|
const PDFType3Font* parentFont = static_cast<const PDFType3Font*>(m_parentFont.get());
|
|
|
|
for (const auto& contentStreamItem : parentFont->getContentStreams())
|
|
{
|
|
CharacterInfo info;
|
|
info.gid = contentStreamItem.first;
|
|
info.character = parentFont->getUnicode(contentStreamItem.first);
|
|
result.emplace_back(qMove(info));
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
} // namespace pdf
|