Adding upstream version 1:7.0.4.upstream/1%7.0.4upstream

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

1 files changed, 126 insertions, 0 deletions

diff --git a/vcl/inc/fontinstance.hxx b/vcl/inc/fontinstance.hxx
new file mode 100644
index 000000000..4aff50c95
--- /dev/null
+++ b/vcl/inc/fontinstance.hxx
@@ -0,0 +1,126 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#ifndef INCLUDED_VCL_INC_FONTINSTANCE_HXX
+#define INCLUDED_VCL_INC_FONTINSTANCE_HXX
+
+#include "fontselect.hxx"
+#include "impfontmetricdata.hxx"
+
+#include <basegfx/polygon/b2dpolypolygon.hxx>
+#include <rtl/ref.hxx>
+#include <salhelper/simplereferenceobject.hxx>
+#include <tools/gen.hxx>
+#include <tools/fontenum.hxx>
+#include <vcl/glyphitem.hxx>
+
+#include <optional>
+#include <unordered_map>
+#include <memory>
+
+#include <hb.h>
+
+class ConvertChar;
+class ImplFontCache;
+class PhysicalFontFace;
+
+// TODO: allow sharing of metrics for related fonts
+
+class VCL_PLUGIN_PUBLIC LogicalFontInstance : public salhelper::SimpleReferenceObject
+{
+    // just declaring the factory function doesn't work AKA
+    // friend LogicalFontInstance* PhysicalFontFace::CreateFontInstance(const FontSelectPattern&) const;
+    friend class PhysicalFontFace;
+    friend class ImplFontCache;
+
+public: // TODO: make data members private
+    virtual ~LogicalFontInstance() override;
+
+    ImplFontMetricDataRef mxFontMetric;        // Font attributes
+    const ConvertChar* mpConversion;        // used e.g. for StarBats->StarSymbol
+
+    long            mnLineHeight;
+    short           mnOwnOrientation;       // text angle if lower layers don't rotate text themselves
+    short           mnOrientation;          // text angle in 3600 system
+    bool            mbInit;                 // true if maFontMetric member is valid
+
+    void            AddFallbackForUnicode( sal_UCS4, FontWeight eWeight, const OUString& rFontName );
+    bool            GetFallbackForUnicode( sal_UCS4, FontWeight eWeight, OUString* pFontName ) const;
+    void            IgnoreFallbackForUnicode( sal_UCS4, FontWeight eWeight, const OUString& rFontName );
+
+    inline hb_font_t* GetHbFont();
+    bool IsGraphiteFont();
+    void SetAverageWidthFactor(double nFactor) { m_nAveWidthFactor = std::abs(nFactor); }
+    double GetAverageWidthFactor() const { return m_nAveWidthFactor; }
+    const FontSelectPattern& GetFontSelectPattern() const { return m_aFontSelData; }
+
+    const PhysicalFontFace* GetFontFace() const { return m_pFontFace.get(); }
+    PhysicalFontFace* GetFontFace() { return m_pFontFace.get(); }
+    const ImplFontCache* GetFontCache() const { return mpFontCache; }
+
+    bool GetGlyphBoundRect(sal_GlyphId, tools::Rectangle&, bool) const;
+    virtual bool GetGlyphOutline(sal_GlyphId, basegfx::B2DPolyPolygon&, bool) const = 0;
+
+    int GetKashidaWidth();
+
+    void GetScale(double* nXScale, double* nYScale);
+    static inline void DecodeOpenTypeTag(const uint32_t nTableTag, char* pTagName);
+
+protected:
+    explicit LogicalFontInstance(const PhysicalFontFace&, const FontSelectPattern&);
+
+    virtual bool ImplGetGlyphBoundRect(sal_GlyphId, tools::Rectangle&, bool) const = 0;
+
+    // Takes ownership of pHbFace.
+    static hb_font_t* InitHbFont(hb_face_t* pHbFace);
+    virtual hb_font_t* ImplInitHbFont() { assert(false); return hb_font_get_empty(); }
+
+private:
+    // cache of Unicode characters and replacement font names
+    // TODO: a fallback map can be shared with many other ImplFontEntries
+    // TODO: at least the ones which just differ in orientation, stretching or height
+    typedef ::std::unordered_map< ::std::pair<sal_UCS4,FontWeight>, OUString > UnicodeFallbackList;
+    std::unique_ptr<UnicodeFallbackList> mpUnicodeFallbackList;
+    mutable ImplFontCache * mpFontCache;
+    const FontSelectPattern m_aFontSelData;
+    hb_font_t* m_pHbFont;
+    double m_nAveWidthFactor;
+    rtl::Reference<PhysicalFontFace> m_pFontFace;
+    std::optional<bool> m_xbIsGraphiteFont;
+};
+
+inline hb_font_t* LogicalFontInstance::GetHbFont()
+{
+    if (!m_pHbFont)
+        m_pHbFont = ImplInitHbFont();
+    return m_pHbFont;
+}
+
+inline void LogicalFontInstance::DecodeOpenTypeTag(const uint32_t nTableTag, char* pTagName)
+{
+    pTagName[0] = static_cast<char>(nTableTag >> 24);
+    pTagName[1] = static_cast<char>(nTableTag >> 16);
+    pTagName[2] = static_cast<char>(nTableTag >> 8);
+    pTagName[3] = static_cast<char>(nTableTag);
+    pTagName[4] = 0;
+}
+
+#endif // INCLUDED_VCL_INC_FONTINSTANCE_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */