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| -rw-r--r-- | vcl/inc/unx/glyphcache.hxx | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/vcl/inc/unx/glyphcache.hxx b/vcl/inc/unx/glyphcache.hxx new file mode 100644 index 000000000..983a6ec03 --- /dev/null +++ b/vcl/inc/unx/glyphcache.hxx @@ -0,0 +1,174 @@ +/* -*- 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_GENERIC_GLYPHCACHE_HXX +#define INCLUDED_VCL_INC_GENERIC_GLYPHCACHE_HXX + +#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; +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( 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; + int GetLoadFlags() const { return (mnLoadFlags & ~FT_LOAD_IGNORE_TRANSFORM); } + 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; + 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; + + FreetypeFontInstance& GetFontInstance() const { return mrFontInstance; } + + 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 FontSelectPattern& rFSD); + +private: + friend class FreetypeFontInstance; + friend class FreetypeManager; + + explicit FreetypeFont(FreetypeFontInstance&, std::shared_ptr<FreetypeFontInfo>& rFontInfo); + + void ApplyGlyphTransform(bool bVertical, FT_Glyph) const; + + FreetypeFontInstance& mrFontInstance; + + // 16.16 fixed point values used for a rotated font + long mnCos; + 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; +}; + +#endif // INCLUDED_VCL_INC_GENERIC_GLYPHCACHE_HXX + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |