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+/* -*- 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 .
+ */
+
+#pragma once
+
+#include <sal/config.h>
+
+#include <memory>
+#include <freetype/config/ftheader.h>
+#include FT_FREETYPE_H
+#include FT_GLYPH_H
+
+#include <tools/gen.hxx>
+#include <tools/solar.h>
+#include <unx/gendata.hxx>
+#include <vcl/dllapi.h>
+#include <vcl/outdev.hxx>
+
+#include <fontattributes.hxx>
+#include <fontinstance.hxx>
+#include <impfontmetricdata.hxx>
+
+#include <unordered_map>
+
+class FreetypeFont;
+class FreetypeFontFile;
+class FreetypeFontInstance;
+class FreetypeFontInfo;
+class FontConfigFontOptions;
+namespace vcl::font
+{
+class PhysicalFontCollection;
+}
+class FreetypeFont;
+class SvpGcpHelper;
+
+namespace basegfx { class B2DPolyPolygon; }
+namespace vcl { struct FontCapabilities; }
+
+ /**
+ * The FreetypeManager caches various aspects of Freetype fonts
+ *
+ * It mainly consists of two std::unordered_map lists, which hold the items of the cache.
+ *
+ * They form kind of a tree, with FreetypeFontFile as the roots, referenced by multiple FreetypeFontInfo
+ * entries, which are referenced by the FreetypeFont items.
+ *
+ * All of these items have reference counters, but these don't control the items life-cycle, but that of
+ * the managed resources.
+ *
+ * The respective resources are:
+ * FreetypeFontFile = holds the mmapped font file, as long as it's used by any FreetypeFontInfo.
+ * FreetypeFontInfo = holds the FT_FaceRec_ object, as long as it's used by any FreetypeFont.
+ * FreetypeFont = holds the FT_SizeRec_ and is owned by a FreetypeFontInstance
+ *
+ * FreetypeFontInfo therefore is embedded in the Freetype subclass of PhysicalFontFace.
+ * FreetypeFont is owned by FreetypeFontInstance, the Freetype subclass of LogicalFontInstance.
+ *
+ * Nowadays there is not really a reason to have separate files for the classes, as the FreetypeManager
+ * is just about handling of Freetype based fonts, not some abstract glyphs.
+ **/
+class VCL_DLLPUBLIC FreetypeManager final
+{
+public:
+ ~FreetypeManager();
+
+ static FreetypeManager& get();
+
+ void AddFontFile(const OString& rNormalizedName,
+ int nFaceNum, int nVariantNum,
+ sal_IntPtr nFontId,
+ const FontAttributes&);
+
+ void AnnounceFonts( vcl::font::PhysicalFontCollection* ) const;
+
+ void ClearFontCache();
+
+ FreetypeFont* CreateFont(FreetypeFontInstance* pLogicalFont);
+
+private:
+ // to access the constructor (can't use InitFreetypeManager function, because it's private?!)
+ friend class GenericUnixSalData;
+ explicit FreetypeManager();
+
+ static void InitFreetype();
+ FreetypeFontFile* FindFontFile(const OString& rNativeFileName);
+
+ typedef std::unordered_map<sal_IntPtr, std::shared_ptr<FreetypeFontInfo>> FontInfoList;
+ typedef std::unordered_map<const char*, std::unique_ptr<FreetypeFontFile>, rtl::CStringHash, rtl::CStringEqual> FontFileList;
+
+ FontInfoList m_aFontInfoList;
+ sal_IntPtr m_nMaxFontId;
+
+ FontFileList m_aFontFileList;
+};
+
+class VCL_DLLPUBLIC FreetypeFont final
+{
+public:
+ ~FreetypeFont();
+
+ const OString& GetFontFileName() const;
+ int GetFontFaceIndex() const;
+ int GetFontFaceVariation() const;
+ bool TestFont() const { return mbFaceOk;}
+ FT_Face GetFtFace() const;
+ const FontConfigFontOptions* GetFontOptions() const;
+ bool NeedsArtificialBold() const { return mbArtBold; }
+ bool NeedsArtificialItalic() const { return mbArtItalic; }
+
+ void GetFontMetric(ImplFontMetricDataRef const &) const;
+ const unsigned char* GetTable( const char* pName, sal_uLong* pLength ) const;
+ const FontCharMapRef & GetFontCharMap() const;
+ bool GetFontCapabilities(vcl::FontCapabilities &) const;
+
+ bool GetGlyphBoundRect(sal_GlyphId, tools::Rectangle&, bool) const;
+ bool GetGlyphOutline(sal_GlyphId, basegfx::B2DPolyPolygon&, bool) const;
+ bool GetAntialiasAdvice() const;
+
+ void SetFontVariationsOnHBFont(hb_font_t* pHbFace) const;
+
+ // tdf#127189 FreeType <= 2.8 will fail to render stretched horizontal brace glyphs
+ // in starmath at a fairly low stretch ratio. This appears fixed in 2.9 with
+ // https://git.savannah.gnu.org/cgit/freetype/freetype2.git/commit/?id=91015cb41d8f56777f93394f5a60914bc0c0f330
+ // "Improve complex rendering at high ppem"
+ static bool AlmostHorizontalDrainsRenderingPool(int nRatio, const vcl::font::FontSelectPattern& rFSD);
+
+private:
+ friend class FreetypeFontInstance;
+ friend class FreetypeManager;
+
+ explicit FreetypeFont(FreetypeFontInstance&, const std::shared_ptr<FreetypeFontInfo>& rFontInfo);
+
+ void ApplyGlyphTransform(bool bVertical, FT_Glyph) const;
+
+ FreetypeFontInstance& mrFontInstance;
+
+ // 16.16 fixed point values used for a rotated font
+ tools::Long mnCos;
+ tools::Long mnSin;
+
+ int mnWidth;
+ int mnPrioAntiAlias;
+ std::shared_ptr<FreetypeFontInfo> mxFontInfo;
+ FT_Int mnLoadFlags;
+ double mfStretch;
+ FT_FaceRec_* maFaceFT;
+ FT_SizeRec_* maSizeFT;
+
+ mutable std::unique_ptr<FontConfigFontOptions> mxFontOptions;
+
+ bool mbFaceOk;
+ bool mbArtItalic;
+ bool mbArtBold;
+};
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */