Adding upstream version 1.3+ds.upstream/1.3+dsupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 166 insertions, 0 deletions

diff --git a/src/extension/internal/pdfinput/poppler-cairo-font-engine.h b/src/extension/internal/pdfinput/poppler-cairo-font-engine.h
new file mode 100644
index 0000000..d3e1a94
--- /dev/null
+++ b/src/extension/internal/pdfinput/poppler-cairo-font-engine.h
@@ -0,0 +1,166 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+//========================================================================
+//
+// CairoFontEngine.h
+//
+// Copyright 2003 Glyph & Cog, LLC
+// Copyright 2004 Red Hat, Inc
+//
+//========================================================================
+
+//========================================================================
+//
+// Modified under the Poppler project - http://poppler.freedesktop.org
+//
+// All changes made under the Poppler project to this file are licensed
+// under GPL version 2 or later
+//
+// Copyright (C) 2005, 2006 Kristian Høgsberg <krh@redhat.com>
+// Copyright (C) 2005, 2018, 2019, 2021 Albert Astals Cid <aacid@kde.org>
+// Copyright (C) 2006, 2007 Jeff Muizelaar <jeff@infidigm.net>
+// Copyright (C) 2006, 2010 Carlos Garcia Campos <carlosgc@gnome.org>
+// Copyright (C) 2008, 2017, 2022 Adrian Johnson <ajohnson@redneon.com>
+// Copyright (C) 2013 Thomas Freitag <Thomas.Freitag@alfa.de>
+// Copyright (C) 2018 Adam Reichold <adam.reichold@t-online.de>
+// Copyright (C) 2022 Oliver Sander <oliver.sander@tu-dresden.de>
+//
+// To see a description of the changes please see the Changelog file that
+// came with your tarball or type make ChangeLog if you are building from git
+//
+//========================================================================
+
+#ifndef CAIROFONTENGINE_H
+#define CAIROFONTENGINE_H
+
+#include <cairo-ft.h>
+#include <memory>
+#include <mutex>
+#include <optional>
+#include <unordered_map>
+#include <vector>
+
+#include "GfxFont.h"
+#include "PDFDoc.h"
+#include "poppler-config.h"
+#include "poppler-transition-api.h"
+
+class CairoFontEngine;
+
+class CairoFont
+{
+public:
+    CairoFont(Ref refA, cairo_font_face_t *cairo_font_faceA, std::vector<int> &&codeToGIDA, bool substituteA,
+              bool printingA);
+    virtual ~CairoFont();
+    CairoFont(const CairoFont &) = delete;
+    CairoFont &operator=(const CairoFont &other) = delete;
+
+    virtual bool matches(Ref &other, bool printing);
+    cairo_font_face_t *getFontFace();
+    unsigned long getGlyph(CharCode code, const Unicode *u, int uLen);
+#if POPPLER_CHECK_VERSION(22, 4, 0)
+    double getSubstitutionCorrection(const std::shared_ptr<GfxFont> &gfxFont);
+#else
+    double getSubstitutionCorrection(GfxFont *gfxFont);
+#endif
+
+    bool isSubstitute() { return substitute; }
+
+protected:
+    Ref ref;
+    cairo_font_face_t *cairo_font_face;
+
+    std::vector<int> codeToGID;
+
+    bool substitute;
+    bool printing;
+};
+
+//------------------------------------------------------------------------
+
+struct FreeTypeFontFace
+{
+    FT_Face face;
+    cairo_font_face_t *cairo_font_face;
+};
+
+class CairoFreeTypeFont : public CairoFont
+{
+public:
+#if POPPLER_CHECK_VERSION(22, 4, 0)
+    static CairoFreeTypeFont *create(const std::shared_ptr<GfxFont> &gfxFont, XRef *xref, FT_Library lib,
+                                     CairoFontEngine *fontEngine, bool useCIDs);
+#else
+    static CairoFreeTypeFont *create(GfxFont *gfxFont, XRef *xref, FT_Library lib, CairoFontEngine *fontEngine,
+                                     bool useCIDs);
+#endif
+    ~CairoFreeTypeFont() override;
+
+private:
+    CairoFreeTypeFont(Ref ref, cairo_font_face_t *cairo_font_face, std::vector<int> &&codeToGID, bool substitute);
+
+    static std::optional<FreeTypeFontFace> getFreeTypeFontFace(CairoFontEngine *fontEngine, FT_Library lib,
+                                                               const std::string &filename,
+                                                               std::vector<unsigned char> &&data);
+};
+
+//------------------------------------------------------------------------
+
+class CairoType3Font : public CairoFont
+{
+public:
+#if POPPLER_CHECK_VERSION(22, 4, 0)
+    static CairoType3Font *create(const std::shared_ptr<GfxFont> &gfxFont, PDFDoc *doc, CairoFontEngine *fontEngine,
+                                  bool printing, XRef *xref);
+#else
+    static CairoType3Font *create(GfxFont *gfxFont, PDFDoc *doc, CairoFontEngine *fontEngine, bool printing,
+                                  XRef *xref);
+#endif
+    ~CairoType3Font() override;
+
+    bool matches(Ref &other, bool printing) override;
+
+private:
+    CairoType3Font(Ref ref, cairo_font_face_t *cairo_font_face, std::vector<int> &&codeToGIDA, bool printing,
+                   XRef *xref);
+};
+
+//------------------------------------------------------------------------
+
+//------------------------------------------------------------------------
+// CairoFontEngine
+//------------------------------------------------------------------------
+
+class CairoFontEngine
+{
+public:
+    // Create a font engine.
+    explicit CairoFontEngine(FT_Library libA);
+    ~CairoFontEngine();
+    CairoFontEngine(const CairoFontEngine &) = delete;
+    CairoFontEngine &operator=(const CairoFontEngine &other) = delete;
+
+#if POPPLER_CHECK_VERSION(22, 4, 0)
+    std::shared_ptr<CairoFont> getFont(const std::shared_ptr<GfxFont> &gfxFont, PDFDoc *doc, bool printing, XRef *xref);
+#else
+    std::shared_ptr<CairoFont> getFont(GfxFont *gfxFont, PDFDoc *doc, bool printing, XRef *xref);
+#endif
+
+    static std::optional<FreeTypeFontFace> getExternalFontFace(FT_Library ftlib, const std::string &filename);
+
+private:
+    FT_Library lib;
+    bool useCIDs;
+    mutable std::mutex mutex;
+
+    // Cache of CairoFont for current document
+    // Most recently used is at the end of the vector.
+    static const size_t cairoFontCacheSize = 64;
+    std::vector<std::shared_ptr<CairoFont>> fontCache;
+
+    // Global cache of cairo_font_face_t for external font files.
+    static std::unordered_map<std::string, FreeTypeFontFace> fontFileCache;
+    static std::recursive_mutex fontFileCacheMutex;
+};
+
+#endif