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https://github.com/mozilla/gecko-dev.git
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2b03a82ba0
This removes a lot of old cruft in thebes to instantiate Cairo scaled fonts. Instead, we only instantiate the Cairo scaled font inside Moz2D when we actually need it for DrawTargetCairo. This thus gets rid of the duplicated code we had inside both Moz2D and thebes to deal with Cairo scaled fonts. Differential Revision: https://phabricator.services.mozilla.com/D47297 --HG-- extra : moz-landing-system : lando
356 lines
13 KiB
C++
356 lines
13 KiB
C++
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef GFXFCPLATFORMFONTLIST_H_
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#define GFXFCPLATFORMFONTLIST_H_
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#include "gfxFT2FontBase.h"
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#include "gfxPlatformFontList.h"
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#include "mozilla/FontPropertyTypes.h"
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#include "mozilla/mozalloc.h"
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#include "nsAutoRef.h"
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#include "nsClassHashtable.h"
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#include <fontconfig/fontconfig.h>
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#include "ft2build.h"
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#include FT_FREETYPE_H
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#include FT_TRUETYPE_TABLES_H
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#include FT_MULTIPLE_MASTERS_H
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#if defined(MOZ_SANDBOX) && defined(XP_LINUX)
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# include "mozilla/SandboxBroker.h"
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#endif
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namespace mozilla {
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namespace dom {
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class SystemFontListEntry;
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};
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}; // namespace mozilla
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template <>
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class nsAutoRefTraits<FcPattern> : public nsPointerRefTraits<FcPattern> {
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public:
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static void Release(FcPattern* ptr) { FcPatternDestroy(ptr); }
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static void AddRef(FcPattern* ptr) { FcPatternReference(ptr); }
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};
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template <>
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class nsAutoRefTraits<FcConfig> : public nsPointerRefTraits<FcConfig> {
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public:
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static void Release(FcConfig* ptr) { FcConfigDestroy(ptr); }
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static void AddRef(FcConfig* ptr) { FcConfigReference(ptr); }
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};
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// The names for the font entry and font classes should really
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// the common 'Fc' abbreviation but the gfxPangoFontGroup code already
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// defines versions of these, so use the verbose name for now.
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class gfxFontconfigFontEntry : public gfxFT2FontEntryBase {
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public:
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// used for system fonts with explicit patterns
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explicit gfxFontconfigFontEntry(const nsACString& aFaceName,
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FcPattern* aFontPattern,
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bool aIgnoreFcCharmap);
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// used for data fonts where the fontentry takes ownership
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// of the font data and the FT_Face
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explicit gfxFontconfigFontEntry(const nsACString& aFaceName,
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WeightRange aWeight, StretchRange aStretch,
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SlantStyleRange aStyle,
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RefPtr<mozilla::gfx::SharedFTFace>&& aFace);
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// used for @font-face local system fonts with explicit patterns
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explicit gfxFontconfigFontEntry(const nsACString& aFaceName,
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FcPattern* aFontPattern, WeightRange aWeight,
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StretchRange aStretch,
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SlantStyleRange aStyle);
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gfxFontEntry* Clone() const override;
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FcPattern* GetPattern() { return mFontPattern; }
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nsresult ReadCMAP(FontInfoData* aFontInfoData = nullptr) override;
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bool TestCharacterMap(uint32_t aCh) override;
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const RefPtr<mozilla::gfx::SharedFTFace>& GetFTFace();
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FTUserFontData* GetUserFontData();
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FT_MM_Var* GetMMVar() override;
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bool HasVariations() override;
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void GetVariationAxes(nsTArray<gfxFontVariationAxis>& aAxes) override;
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void GetVariationInstances(
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nsTArray<gfxFontVariationInstance>& aInstances) override;
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hb_blob_t* GetFontTable(uint32_t aTableTag) override;
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void ForgetHBFace() override;
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void ReleaseGrFace(gr_face* aFace) override;
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double GetAspect();
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protected:
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virtual ~gfxFontconfigFontEntry();
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gfxFont* CreateFontInstance(const gfxFontStyle* aFontStyle) override;
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// override to pull data from FTFace
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virtual nsresult CopyFontTable(uint32_t aTableTag,
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nsTArray<uint8_t>& aBuffer) override;
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// pattern for a single face of a family
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nsCountedRef<FcPattern> mFontPattern;
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// FTFace - initialized when needed
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RefPtr<mozilla::gfx::SharedFTFace> mFTFace;
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bool mFTFaceInitialized;
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// Whether TestCharacterMap should check the actual cmap rather than asking
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// fontconfig about character coverage.
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// We do this for app-bundled (rather than system) fonts, as they may
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// include color glyphs that fontconfig would overlook, and for fonts
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// loaded via @font-face.
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bool mIgnoreFcCharmap;
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// Whether the face supports variations. For system-installed fonts, we
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// query fontconfig for this (so they will only work if fontconfig is
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// recent enough to include support); for downloaded user-fonts we query
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// the FreeType face.
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bool mHasVariations;
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bool mHasVariationsInitialized;
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double mAspect;
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class UnscaledFontCache {
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public:
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already_AddRefed<mozilla::gfx::UnscaledFontFontconfig> Lookup(
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const std::string& aFile, uint32_t aIndex);
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void Add(
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const RefPtr<mozilla::gfx::UnscaledFontFontconfig>& aUnscaledFont) {
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mUnscaledFonts[kNumEntries - 1] = aUnscaledFont;
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MoveToFront(kNumEntries - 1);
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}
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private:
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void MoveToFront(size_t aIndex);
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static const size_t kNumEntries = 3;
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mozilla::ThreadSafeWeakPtr<mozilla::gfx::UnscaledFontFontconfig>
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mUnscaledFonts[kNumEntries];
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};
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UnscaledFontCache mUnscaledFontCache;
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// Because of FreeType bug 52955, we keep the FT_MM_Var struct when it is
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// first loaded, rather than releasing it and re-fetching it as needed.
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FT_MM_Var* mMMVar = nullptr;
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bool mMMVarInitialized = false;
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};
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class gfxFontconfigFontFamily : public gfxFontFamily {
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public:
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explicit gfxFontconfigFontFamily(const nsACString& aName)
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: gfxFontFamily(aName),
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mContainsAppFonts(false),
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mHasNonScalableFaces(false),
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mForceScalable(false) {}
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template <typename Func>
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void AddFacesToFontList(Func aAddPatternFunc);
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void FindStyleVariations(FontInfoData* aFontInfoData = nullptr) override;
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// Families are constructed initially with just references to patterns.
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// When necessary, these are enumerated within FindStyleVariations.
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void AddFontPattern(FcPattern* aFontPattern);
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void SetFamilyContainsAppFonts(bool aContainsAppFonts) {
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mContainsAppFonts = aContainsAppFonts;
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}
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void FindAllFontsForStyle(const gfxFontStyle& aFontStyle,
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nsTArray<gfxFontEntry*>& aFontEntryList,
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bool aIgnoreSizeTolerance) override;
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bool FilterForFontList(nsAtom* aLangGroup,
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const nsACString& aGeneric) const final {
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return SupportsLangGroup(aLangGroup);
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}
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protected:
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virtual ~gfxFontconfigFontFamily();
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// helper for FilterForFontList
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bool SupportsLangGroup(nsAtom* aLangGroup) const;
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nsTArray<nsCountedRef<FcPattern>> mFontPatterns;
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bool mContainsAppFonts;
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bool mHasNonScalableFaces;
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bool mForceScalable;
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};
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class gfxFontconfigFont : public gfxFT2FontBase {
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public:
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gfxFontconfigFont(
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const RefPtr<mozilla::gfx::UnscaledFontFontconfig>& aUnscaledFont,
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RefPtr<mozilla::gfx::SharedFTFace>&& aFTFace, FcPattern* aPattern,
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gfxFloat aAdjustedSize, gfxFontEntry* aFontEntry,
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const gfxFontStyle* aFontStyle, int aLoadFlags, bool aEmbolden);
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FontType GetType() const override { return FONT_TYPE_FONTCONFIG; }
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FcPattern* GetPattern() const { return mPattern; }
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already_AddRefed<mozilla::gfx::ScaledFont> GetScaledFont(
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DrawTarget* aTarget) override;
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bool ShouldHintMetrics() const override;
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private:
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virtual ~gfxFontconfigFont();
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nsCountedRef<FcPattern> mPattern;
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};
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class gfxFcPlatformFontList : public gfxPlatformFontList {
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public:
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gfxFcPlatformFontList();
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static gfxFcPlatformFontList* PlatformFontList() {
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return static_cast<gfxFcPlatformFontList*>(sPlatformFontList);
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}
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// initialize font lists
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nsresult InitFontListForPlatform() override;
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void InitSharedFontListForPlatform() override;
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void GetFontList(nsAtom* aLangGroup, const nsACString& aGenericFamily,
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nsTArray<nsString>& aListOfFonts) override;
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void ReadSystemFontList(
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nsTArray<mozilla::dom::SystemFontListEntry>* retValue);
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gfxFontEntry* CreateFontEntry(
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mozilla::fontlist::Face* aFace,
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const mozilla::fontlist::Family* aFamily) override;
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gfxFontEntry* LookupLocalFont(const nsACString& aFontName,
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WeightRange aWeightForEntry,
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StretchRange aStretchForEntry,
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SlantStyleRange aStyleForEntry) override;
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gfxFontEntry* MakePlatformFont(const nsACString& aFontName,
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WeightRange aWeightForEntry,
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StretchRange aStretchForEntry,
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SlantStyleRange aStyleForEntry,
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const uint8_t* aFontData,
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uint32_t aLength) override;
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bool FindAndAddFamilies(mozilla::StyleGenericFontFamily aGeneric,
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const nsACString& aFamily,
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nsTArray<FamilyAndGeneric>* aOutput,
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FindFamiliesFlags aFlags,
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gfxFontStyle* aStyle = nullptr,
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gfxFloat aDevToCssSize = 1.0) override;
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bool GetStandardFamilyName(const nsCString& aFontName,
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nsACString& aFamilyName) override;
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FcConfig* GetLastConfig() const { return mLastConfig; }
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// override to use fontconfig lookup for generics
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void AddGenericFonts(mozilla::StyleGenericFontFamily, nsAtom* aLanguage,
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nsTArray<FamilyAndGeneric>& aFamilyList) override;
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void ClearLangGroupPrefFonts() override;
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// clear out cached generic-lang ==> family-list mappings
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void ClearGenericMappings() { mGenericMappings.Clear(); }
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// map lang group ==> lang string
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// When aForFontEnumerationThread is true, this method will avoid using
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// LanguageService::LookupLanguage, because it is not safe for off-main-
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// thread use (except by stylo traversal, which does the necessary locking)
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void GetSampleLangForGroup(nsAtom* aLanguage, nsACString& aLangStr,
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bool aForFontEnumerationThread = false);
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protected:
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virtual ~gfxFcPlatformFontList();
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#if defined(MOZ_SANDBOX) && defined(XP_LINUX)
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typedef mozilla::SandboxBroker::Policy SandboxPolicy;
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#else
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// Dummy type just so we can still have a SandboxPolicy* parameter.
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struct SandboxPolicy {};
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#endif
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// Add all the font families found in a font set.
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// aAppFonts indicates whether this is the system or application fontset.
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void AddFontSetFamilies(FcFontSet* aFontSet, const SandboxPolicy* aPolicy,
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bool aAppFonts);
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// Helper for above, to add a single font pattern.
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void AddPatternToFontList(FcPattern* aFont, FcChar8*& aLastFamilyName,
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nsACString& aFamilyName,
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RefPtr<gfxFontconfigFontFamily>& aFontFamily,
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bool aAppFonts);
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// figure out which families fontconfig maps a generic to
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// (aGeneric assumed already lowercase)
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PrefFontList* FindGenericFamilies(const nsCString& aGeneric,
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nsAtom* aLanguage);
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// are all pref font settings set to use fontconfig generics?
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bool PrefFontListsUseOnlyGenerics();
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static void CheckFontUpdates(nsITimer* aTimer, void* aThis);
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FontFamily GetDefaultFontForPlatform(const gfxFontStyle* aStyle) override;
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gfxFontFamily* CreateFontFamily(const nsACString& aName) const override;
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// helper method for finding an appropriate lang string
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bool TryLangForGroup(const nsACString& aOSLang, nsAtom* aLangGroup,
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nsACString& aLang, bool aForFontEnumerationThread);
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#ifdef MOZ_BUNDLED_FONTS
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void ActivateBundledFonts();
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nsCString mBundledFontsPath;
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bool mBundledFontsInitialized;
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#endif
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// to avoid enumerating all fonts, maintain a mapping of local font
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// names to family
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nsBaseHashtable<nsCStringHashKey, nsCountedRef<FcPattern>, FcPattern*>
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mLocalNames;
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// caching generic/lang ==> font family list
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nsClassHashtable<nsCStringHashKey, PrefFontList> mGenericMappings;
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// Caching family lookups as found by FindAndAddFamilies after resolving
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// substitutions. The gfxFontFamily objects cached here are owned by the
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// gfxFcPlatformFontList via its mFamilies table; note that if the main
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// font list is rebuilt (e.g. due to a fontconfig configuration change),
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// these pointers will be invalidated. InitFontList() flushes the cache
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// in this case.
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nsDataHashtable<nsCStringHashKey, nsTArray<FamilyAndGeneric>>
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mFcSubstituteCache;
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nsCOMPtr<nsITimer> mCheckFontUpdatesTimer;
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nsCountedRef<FcConfig> mLastConfig;
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// By default, font prefs under Linux are set to simply lookup
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// via fontconfig the appropriate font for serif/sans-serif/monospace.
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// Rather than check each time a font pref is used, check them all at startup
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// and set a boolean to flag the case that non-default user font prefs exist
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// Note: langGroup == x-math is handled separately
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bool mAlwaysUseFontconfigGenerics;
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static FT_Library sFTLibrary;
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};
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#endif /* GFXPLATFORMFONTLIST_H_ */
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