зеркало из https://github.com/mozilla/gecko-dev.git
823 строки
32 KiB
C++
823 строки
32 KiB
C++
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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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 GFX_FONTENTRY_H
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#define GFX_FONTENTRY_H
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#include "gfxTypes.h"
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#include "nsString.h"
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#include "gfxFontConstants.h"
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#include "gfxFontFeatures.h"
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#include "gfxFontUtils.h"
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#include "nsTArray.h"
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#include "nsTHashtable.h"
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#include "mozilla/HashFunctions.h"
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#include "mozilla/MemoryReporting.h"
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#include "MainThreadUtils.h"
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#include "nsUnicodeScriptCodes.h"
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#include "nsDataHashtable.h"
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#include "harfbuzz/hb.h"
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#include "mozilla/gfx/2D.h"
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#include "mozilla/UniquePtr.h"
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#include "mozilla/WeakPtr.h"
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typedef struct gr_face gr_face;
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#ifdef DEBUG
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#include <stdio.h>
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#endif
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struct gfxFontStyle;
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class gfxContext;
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class gfxFont;
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class gfxFontFamily;
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class gfxUserFontData;
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class gfxSVGGlyphs;
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class FontInfoData;
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struct FontListSizes;
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class nsAtom;
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namespace mozilla {
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class SVGContextPaint;
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};
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class gfxCharacterMap : public gfxSparseBitSet {
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public:
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nsrefcnt AddRef() {
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NS_PRECONDITION(int32_t(mRefCnt) >= 0, "illegal refcnt");
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++mRefCnt;
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NS_LOG_ADDREF(this, mRefCnt, "gfxCharacterMap", sizeof(*this));
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return mRefCnt;
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}
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nsrefcnt Release() {
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NS_PRECONDITION(0 != mRefCnt, "dup release");
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--mRefCnt;
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NS_LOG_RELEASE(this, mRefCnt, "gfxCharacterMap");
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if (mRefCnt == 0) {
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NotifyReleased();
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// |this| has been deleted.
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return 0;
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}
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return mRefCnt;
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}
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gfxCharacterMap() :
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mHash(0), mBuildOnTheFly(false), mShared(false)
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{ }
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explicit gfxCharacterMap(const gfxSparseBitSet& aOther) :
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gfxSparseBitSet(aOther),
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mHash(0), mBuildOnTheFly(false), mShared(false)
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{ }
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void CalcHash() { mHash = GetChecksum(); }
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size_t SizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf) const {
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return gfxSparseBitSet::SizeOfExcludingThis(aMallocSizeOf);
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}
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// hash of the cmap bitvector
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uint32_t mHash;
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// if cmap is built on the fly it's never shared
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bool mBuildOnTheFly;
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// cmap is shared globally
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bool mShared;
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protected:
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void NotifyReleased();
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nsAutoRefCnt mRefCnt;
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private:
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gfxCharacterMap(const gfxCharacterMap&);
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gfxCharacterMap& operator=(const gfxCharacterMap&);
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};
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class gfxFontEntry {
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public:
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typedef mozilla::gfx::DrawTarget DrawTarget;
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typedef mozilla::unicode::Script Script;
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// Used by stylo
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NS_INLINE_DECL_THREADSAFE_REFCOUNTING(gfxFontEntry)
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explicit gfxFontEntry(const nsAString& aName, bool aIsStandardFace = false);
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// Create a new entry that refers to the same font as this, but without
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// additional state that may have been set up (such as family name).
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// (This is only to be used for system fonts in the platform font list,
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// not user fonts.)
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virtual gfxFontEntry* Clone() const = 0;
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// unique name for the face, *not* the family; not necessarily the
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// "real" or user-friendly name, may be an internal identifier
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const nsString& Name() const { return mName; }
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// family name
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const nsString& FamilyName() const { return mFamilyName; }
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// The following two methods may be relatively expensive, as they
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// will (usually, except on Linux) load and parse the 'name' table;
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// they are intended only for the font-inspection API, not for
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// perf-critical layout/drawing work.
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// The "real" name of the face, if available from the font resource;
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// returns Name() if nothing better is available.
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virtual nsString RealFaceName();
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uint16_t Weight() const { return mWeight; }
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int16_t Stretch() const { return mStretch; }
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bool IsUserFont() const { return mIsDataUserFont || mIsLocalUserFont; }
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bool IsLocalUserFont() const { return mIsLocalUserFont; }
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bool IsFixedPitch() const { return mFixedPitch; }
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bool IsItalic() const { return mStyle == NS_FONT_STYLE_ITALIC; }
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bool IsOblique() const { return mStyle == NS_FONT_STYLE_OBLIQUE; }
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bool IsUpright() const { return mStyle == NS_FONT_STYLE_NORMAL; }
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bool IsBold() const { return mWeight >= 600; } // bold == weights 600 and above
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bool IgnoreGDEF() const { return mIgnoreGDEF; }
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bool IgnoreGSUB() const { return mIgnoreGSUB; }
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// Return whether the face corresponds to "normal" CSS style properties:
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// font-style: normal;
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// font-weight: normal;
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// font-stretch: normal;
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// If this is false, we might want to fall back to a different face and
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// possibly apply synthetic styling.
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bool IsNormalStyle() const
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{
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return IsUpright() &&
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Weight() == NS_FONT_WEIGHT_NORMAL &&
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Stretch() == NS_FONT_STRETCH_NORMAL;
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}
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// whether a feature is supported by the font (limited to a small set
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// of features for which some form of fallback needs to be implemented)
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virtual bool SupportsOpenTypeFeature(Script aScript, uint32_t aFeatureTag);
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bool SupportsGraphiteFeature(uint32_t aFeatureTag);
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// returns a set containing all input glyph ids for a given feature
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const hb_set_t*
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InputsForOpenTypeFeature(Script aScript, uint32_t aFeatureTag);
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virtual bool HasFontTable(uint32_t aTableTag);
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inline bool HasGraphiteTables() {
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if (!mCheckedForGraphiteTables) {
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CheckForGraphiteTables();
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mCheckedForGraphiteTables = true;
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}
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return mHasGraphiteTables;
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}
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inline bool HasCmapTable() {
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if (!mCharacterMap) {
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ReadCMAP();
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NS_ASSERTION(mCharacterMap, "failed to initialize character map");
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}
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return mHasCmapTable;
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}
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inline bool HasCharacter(uint32_t ch) {
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if (mCharacterMap && mCharacterMap->test(ch)) {
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return true;
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}
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return TestCharacterMap(ch);
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}
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virtual bool SkipDuringSystemFallback() { return false; }
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nsresult InitializeUVSMap();
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uint16_t GetUVSGlyph(uint32_t aCh, uint32_t aVS);
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// All concrete gfxFontEntry subclasses (except gfxUserFontEntry) need
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// to override this, otherwise the font will never be used as it will
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// be considered to support no characters.
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// ReadCMAP() must *always* set the mCharacterMap pointer to a valid
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// gfxCharacterMap, even if empty, as other code assumes this pointer
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// can be safely dereferenced.
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virtual nsresult ReadCMAP(FontInfoData *aFontInfoData = nullptr);
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bool TryGetSVGData(gfxFont* aFont);
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bool HasSVGGlyph(uint32_t aGlyphId);
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bool GetSVGGlyphExtents(DrawTarget* aDrawTarget, uint32_t aGlyphId,
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gfxRect *aResult);
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void RenderSVGGlyph(gfxContext *aContext, uint32_t aGlyphId,
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mozilla::SVGContextPaint* aContextPaint);
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// Call this when glyph geometry or rendering has changed
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// (e.g. animated SVG glyphs)
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void NotifyGlyphsChanged();
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bool TryGetColorGlyphs();
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bool GetColorLayersInfo(uint32_t aGlyphId,
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const mozilla::gfx::Color& aDefaultColor,
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nsTArray<uint16_t>& layerGlyphs,
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nsTArray<mozilla::gfx::Color>& layerColors);
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// Access to raw font table data (needed for Harfbuzz):
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// returns a pointer to data owned by the fontEntry or the OS,
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// which will remain valid until the blob is destroyed.
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// The data MUST be treated as read-only; we may be getting a
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// reference to a shared system font cache.
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//
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// The default implementation uses CopyFontTable to get the data
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// into a byte array, and maintains a cache of loaded tables.
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//
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// Subclasses should override this if they can provide more efficient
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// access than copying table data into our own buffers.
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//
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// Get blob that encapsulates a specific font table, or nullptr if
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// the table doesn't exist in the font.
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//
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// Caller is responsible to call hb_blob_destroy() on the returned blob
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// (if non-nullptr) when no longer required. For transient access to a
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// table, use of AutoTable (below) is generally preferred.
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virtual hb_blob_t *GetFontTable(uint32_t aTag);
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// Stack-based utility to return a specified table, automatically releasing
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// the blob when the AutoTable goes out of scope.
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class AutoTable {
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public:
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AutoTable(gfxFontEntry* aFontEntry, uint32_t aTag)
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{
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mBlob = aFontEntry->GetFontTable(aTag);
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}
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~AutoTable() {
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if (mBlob) {
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hb_blob_destroy(mBlob);
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}
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}
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operator hb_blob_t*() const { return mBlob; }
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private:
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hb_blob_t* mBlob;
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// not implemented:
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AutoTable(const AutoTable&) = delete;
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AutoTable& operator=(const AutoTable&) = delete;
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};
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// Return a font instance for a particular style. This may be a newly-
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// created instance, or a font already in the global cache.
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// We can't return a UniquePtr here, because we may be returning a shared
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// cached instance; but we also don't return already_AddRefed, because
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// the caller may only need to use the font temporarily and doesn't need
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// a strong reference.
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gfxFont* FindOrMakeFont(const gfxFontStyle *aStyle,
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bool aNeedsBold,
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gfxCharacterMap* aUnicodeRangeMap = nullptr);
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// Get an existing font table cache entry in aBlob if it has been
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// registered, or return false if not. Callers must call
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// hb_blob_destroy on aBlob if true is returned.
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//
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// Note that some gfxFont implementations may not call this at all,
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// if it is more efficient to get the table from the OS at that level.
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bool GetExistingFontTable(uint32_t aTag, hb_blob_t** aBlob);
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// Elements of aTable are transferred (not copied) to and returned in a
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// new hb_blob_t which is registered on the gfxFontEntry, but the initial
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// reference is owned by the caller. Removing the last reference
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// unregisters the table from the font entry.
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//
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// Pass nullptr for aBuffer to indicate that the table is not present and
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// nullptr will be returned. Also returns nullptr on OOM.
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hb_blob_t *ShareFontTableAndGetBlob(uint32_t aTag,
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nsTArray<uint8_t>* aTable);
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// Get the font's unitsPerEm from the 'head' table, in the case of an
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// sfnt resource. Will return kInvalidUPEM for non-sfnt fonts,
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// if present on the platform.
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uint16_t UnitsPerEm();
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enum {
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kMinUPEM = 16, // Limits on valid unitsPerEm range, from the
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kMaxUPEM = 16384, // OpenType spec
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kInvalidUPEM = uint16_t(-1)
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};
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// Shaper face accessors:
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// NOTE that harfbuzz and graphite handle ownership/lifetime of the face
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// object in completely different ways.
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// Get HarfBuzz face corresponding to this font file.
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// Caller must release with hb_face_destroy() when finished with it,
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// and the font entry will be notified via ForgetHBFace.
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hb_face_t* GetHBFace();
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virtual void ForgetHBFace();
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// Get Graphite face corresponding to this font file.
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// Caller must call gfxFontEntry::ReleaseGrFace when finished with it.
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gr_face* GetGrFace();
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virtual void ReleaseGrFace(gr_face* aFace);
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// Does the font have graphite contextuals that involve the space glyph
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// (and therefore we should bypass the word cache)?
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bool HasGraphiteSpaceContextuals();
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// Release any SVG-glyphs document this font may have loaded.
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void DisconnectSVG();
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// Called to notify that aFont is being destroyed. Needed when we're tracking
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// the fonts belonging to this font entry.
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void NotifyFontDestroyed(gfxFont* aFont);
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// For memory reporting of the platform font list.
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virtual void AddSizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf,
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FontListSizes* aSizes) const;
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virtual void AddSizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf,
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FontListSizes* aSizes) const;
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// Used for reporting on individual font entries in the user font cache,
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// which are not present in the platform font list.
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size_t
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ComputedSizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf) const;
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// Used when checking for complex script support, to mask off cmap ranges
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struct ScriptRange {
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uint32_t rangeStart;
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uint32_t rangeEnd;
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hb_tag_t tags[3]; // one or two OpenType script tags to check,
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// plus a NULL terminator
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};
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bool SupportsScriptInGSUB(const hb_tag_t* aScriptTags);
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nsString mName;
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nsString mFamilyName;
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uint8_t mStyle : 2; // italic/oblique
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bool mFixedPitch : 1;
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bool mIsBadUnderlineFont : 1;
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bool mIsUserFontContainer : 1; // userfont entry
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bool mIsDataUserFont : 1; // platform font entry (data)
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bool mIsLocalUserFont : 1; // platform font entry (local)
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bool mStandardFace : 1;
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bool mIgnoreGDEF : 1;
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bool mIgnoreGSUB : 1;
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bool mSVGInitialized : 1;
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bool mHasSpaceFeaturesInitialized : 1;
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bool mHasSpaceFeatures : 1;
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bool mHasSpaceFeaturesKerning : 1;
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bool mHasSpaceFeaturesNonKerning : 1;
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bool mSkipDefaultFeatureSpaceCheck : 1;
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bool mGraphiteSpaceContextualsInitialized : 1;
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bool mHasGraphiteSpaceContextuals : 1;
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bool mSpaceGlyphIsInvisible : 1;
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bool mSpaceGlyphIsInvisibleInitialized : 1;
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bool mHasGraphiteTables : 1;
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bool mCheckedForGraphiteTables : 1;
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bool mHasCmapTable : 1;
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bool mGrFaceInitialized : 1;
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bool mCheckedForColorGlyph : 1;
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// bitvector of substitution space features per script, one each
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// for default and non-default features
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uint32_t mDefaultSubSpaceFeatures[(int(Script::NUM_SCRIPT_CODES) + 31) / 32];
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uint32_t mNonDefaultSubSpaceFeatures[(int(Script::NUM_SCRIPT_CODES) + 31) / 32];
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uint16_t mWeight;
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int16_t mStretch;
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RefPtr<gfxCharacterMap> mCharacterMap;
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uint32_t mUVSOffset;
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mozilla::UniquePtr<uint8_t[]> mUVSData;
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mozilla::UniquePtr<gfxUserFontData> mUserFontData;
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mozilla::UniquePtr<gfxSVGGlyphs> mSVGGlyphs;
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// list of gfxFonts that are using SVG glyphs
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nsTArray<gfxFont*> mFontsUsingSVGGlyphs;
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nsTArray<gfxFontFeature> mFeatureSettings;
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mozilla::UniquePtr<nsDataHashtable<nsUint32HashKey,bool>> mSupportedFeatures;
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mozilla::UniquePtr<nsDataHashtable<nsUint32HashKey,hb_set_t*>> mFeatureInputs;
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uint32_t mLanguageOverride;
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// Color Layer font support
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hb_blob_t* mCOLR;
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hb_blob_t* mCPAL;
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protected:
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friend class gfxPlatformFontList;
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friend class gfxMacPlatformFontList;
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friend class gfxUserFcFontEntry;
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friend class gfxFontFamily;
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friend class gfxSingleFaceMacFontFamily;
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friend class gfxUserFontEntry;
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gfxFontEntry();
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// Protected destructor, to discourage deletion outside of Release():
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virtual ~gfxFontEntry();
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virtual gfxFont *CreateFontInstance(const gfxFontStyle *aFontStyle,
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bool aNeedsBold) = 0;
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virtual void CheckForGraphiteTables();
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// Copy a font table into aBuffer.
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// The caller will be responsible for ownership of the data.
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virtual nsresult CopyFontTable(uint32_t aTableTag,
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nsTArray<uint8_t>& aBuffer) {
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NS_NOTREACHED("forgot to override either GetFontTable or CopyFontTable?");
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return NS_ERROR_FAILURE;
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}
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// lookup the cmap in cached font data
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virtual already_AddRefed<gfxCharacterMap>
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GetCMAPFromFontInfo(FontInfoData *aFontInfoData,
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uint32_t& aUVSOffset);
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// helper for HasCharacter(), which is what client code should call
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virtual bool TestCharacterMap(uint32_t aCh);
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// Font's unitsPerEm from the 'head' table, if available (will be set to
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// kInvalidUPEM for non-sfnt font formats)
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uint16_t mUnitsPerEm;
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// Shaper-specific face objects, shared by all instantiations of the same
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// physical font, regardless of size.
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// Usually, only one of these will actually be created for any given font
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// entry, depending on the font tables that are present.
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// hb_face_t is refcounted internally, so each shaper that's using it will
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// bump the ref count when it acquires the face, and "destroy" (release) it
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// in its destructor. The font entry has only this non-owning reference to
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// the face; when the face is deleted, it will tell the font entry to forget
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// it, so that a new face will be created next time it is needed.
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hb_face_t* mHBFace;
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static hb_blob_t* HBGetTable(hb_face_t *face, uint32_t aTag, void *aUserData);
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// Callback that the hb_face will use to tell us when it is being deleted.
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static void HBFaceDeletedCallback(void *aUserData);
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// gr_face is -not- refcounted, so it will be owned directly by the font
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// entry, and we'll keep a count of how many references we've handed out;
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// each shaper is responsible to call ReleaseGrFace on its entry when
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// finished with it, so that we know when it can be deleted.
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gr_face* mGrFace;
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// hashtable to map raw table data ptr back to its owning blob, for use by
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// graphite table-release callback
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nsDataHashtable<nsPtrHashKey<const void>,void*>* mGrTableMap;
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// number of current users of this entry's mGrFace
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nsrefcnt mGrFaceRefCnt;
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static const void* GrGetTable(const void *aAppFaceHandle,
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unsigned int aName,
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size_t *aLen);
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static void GrReleaseTable(const void *aAppFaceHandle,
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const void *aTableBuffer);
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// For memory reporting: size of user-font data belonging to this entry.
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// We record this in the font entry because the actual data block may be
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// handed over to platform APIs, so that it would become difficult (and
|
|
// platform-specific) to measure it directly at report-gathering time.
|
|
uint32_t mComputedSizeOfUserFont;
|
|
|
|
private:
|
|
/**
|
|
* Font table hashtable, to support GetFontTable for harfbuzz.
|
|
*
|
|
* The harfbuzz shaper (and potentially other clients) needs access to raw
|
|
* font table data. This needs to be cached so that it can be used
|
|
* repeatedly (each time we construct a text run; in some cases, for
|
|
* each character/glyph within the run) without re-fetching large tables
|
|
* every time.
|
|
*
|
|
* Because we may instantiate many gfxFonts for the same physical font
|
|
* file (at different sizes), we should ensure that they can share a
|
|
* single cached copy of the font tables. To do this, we implement table
|
|
* access and sharing on the fontEntry rather than the font itself.
|
|
*
|
|
* The default implementation uses GetFontTable() to read font table
|
|
* data into byte arrays, and wraps them in blobs which are registered in
|
|
* a hashtable. The hashtable can then return pre-existing blobs to
|
|
* harfbuzz.
|
|
*
|
|
* Harfbuzz will "destroy" the blobs when it is finished with them. When
|
|
* the last blob reference is removed, the FontTableBlobData user data
|
|
* will remove the blob from the hashtable if still registered.
|
|
*/
|
|
|
|
class FontTableBlobData;
|
|
|
|
/**
|
|
* FontTableHashEntry manages the entries of hb_blob_t's containing font
|
|
* table data.
|
|
*
|
|
* This is used to share font tables across fonts with the same
|
|
* font entry (but different sizes) for use by HarfBuzz. The hashtable
|
|
* does not own a strong reference to the blob, but keeps a weak pointer,
|
|
* managed by FontTableBlobData. Similarly FontTableBlobData keeps only a
|
|
* weak pointer to the hashtable, managed by FontTableHashEntry.
|
|
*/
|
|
|
|
class FontTableHashEntry : public nsUint32HashKey
|
|
{
|
|
public:
|
|
// Declarations for nsTHashtable
|
|
|
|
typedef nsUint32HashKey KeyClass;
|
|
typedef KeyClass::KeyType KeyType;
|
|
typedef KeyClass::KeyTypePointer KeyTypePointer;
|
|
|
|
explicit FontTableHashEntry(KeyTypePointer aTag)
|
|
: KeyClass(aTag)
|
|
, mSharedBlobData(nullptr)
|
|
, mBlob(nullptr)
|
|
{ }
|
|
|
|
// NOTE: This assumes the new entry belongs to the same hashtable as
|
|
// the old, because the mHashtable pointer in mSharedBlobData (if
|
|
// present) will not be updated.
|
|
FontTableHashEntry(FontTableHashEntry&& toMove)
|
|
: KeyClass(mozilla::Move(toMove))
|
|
, mSharedBlobData(mozilla::Move(toMove.mSharedBlobData))
|
|
, mBlob(mozilla::Move(toMove.mBlob))
|
|
{
|
|
toMove.mSharedBlobData = nullptr;
|
|
toMove.mBlob = nullptr;
|
|
}
|
|
|
|
~FontTableHashEntry() { Clear(); }
|
|
|
|
// FontTable/Blob API
|
|
|
|
// Transfer (not copy) elements of aTable to a new hb_blob_t and
|
|
// return ownership to the caller. A weak reference to the blob is
|
|
// recorded in the hashtable entry so that others may use the same
|
|
// table.
|
|
hb_blob_t *
|
|
ShareTableAndGetBlob(nsTArray<uint8_t>&& aTable,
|
|
nsTHashtable<FontTableHashEntry> *aHashtable);
|
|
|
|
// Return a strong reference to the blob.
|
|
// Callers must hb_blob_destroy the returned blob.
|
|
hb_blob_t *GetBlob() const;
|
|
|
|
void Clear();
|
|
|
|
size_t SizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf) const;
|
|
|
|
private:
|
|
static void DeleteFontTableBlobData(void *aBlobData);
|
|
// not implemented
|
|
FontTableHashEntry& operator=(FontTableHashEntry& toCopy);
|
|
|
|
FontTableBlobData *mSharedBlobData;
|
|
hb_blob_t *mBlob;
|
|
};
|
|
|
|
mozilla::UniquePtr<nsTHashtable<FontTableHashEntry> > mFontTableCache;
|
|
|
|
gfxFontEntry(const gfxFontEntry&);
|
|
gfxFontEntry& operator=(const gfxFontEntry&);
|
|
};
|
|
|
|
|
|
// used when iterating over all fonts looking for a match for a given character
|
|
struct GlobalFontMatch {
|
|
GlobalFontMatch(const uint32_t aCharacter,
|
|
const gfxFontStyle *aStyle) :
|
|
mCh(aCharacter), mStyle(aStyle),
|
|
mMatchRank(0), mCount(0), mCmapsTested(0)
|
|
{
|
|
|
|
}
|
|
|
|
const uint32_t mCh; // codepoint to be matched
|
|
const gfxFontStyle* mStyle; // style to match
|
|
int32_t mMatchRank; // metric indicating closest match
|
|
RefPtr<gfxFontEntry> mBestMatch; // current best match
|
|
RefPtr<gfxFontFamily> mMatchedFamily; // the family it belongs to
|
|
uint32_t mCount; // number of fonts matched
|
|
uint32_t mCmapsTested; // number of cmaps tested
|
|
};
|
|
|
|
class gfxFontFamily {
|
|
public:
|
|
// Used by stylo
|
|
NS_INLINE_DECL_THREADSAFE_REFCOUNTING(gfxFontFamily)
|
|
|
|
explicit gfxFontFamily(const nsAString& aName) :
|
|
mName(aName),
|
|
mOtherFamilyNamesInitialized(false),
|
|
mHasOtherFamilyNames(false),
|
|
mFaceNamesInitialized(false),
|
|
mHasStyles(false),
|
|
mIsSimpleFamily(false),
|
|
mIsBadUnderlineFamily(false),
|
|
mFamilyCharacterMapInitialized(false),
|
|
mSkipDefaultFeatureSpaceCheck(false),
|
|
mCheckForFallbackFaces(false),
|
|
mCheckedForLegacyFamilyNames(false)
|
|
{ }
|
|
|
|
const nsString& Name() { return mName; }
|
|
|
|
virtual void LocalizedName(nsAString& aLocalizedName);
|
|
virtual bool HasOtherFamilyNames();
|
|
|
|
// See https://bugzilla.mozilla.org/show_bug.cgi?id=835204:
|
|
// check the font's 'name' table to see if it has a legacy family name
|
|
// that would have been used by GDI (e.g. to split extra-bold or light
|
|
// faces in a large family into separate "styled families" because of
|
|
// GDI's 4-faces-per-family limitation). If found, the styled family
|
|
// name will be added to the font list's "other family names" table.
|
|
bool CheckForLegacyFamilyNames(gfxPlatformFontList* aFontList);
|
|
|
|
nsTArray<RefPtr<gfxFontEntry> >& GetFontList() { return mAvailableFonts; }
|
|
|
|
void AddFontEntry(RefPtr<gfxFontEntry> aFontEntry) {
|
|
// bug 589682 - set the IgnoreGDEF flag on entries for Italic faces
|
|
// of Times New Roman, because of buggy table in those fonts
|
|
if (aFontEntry->IsItalic() && !aFontEntry->IsUserFont() &&
|
|
Name().EqualsLiteral("Times New Roman"))
|
|
{
|
|
aFontEntry->mIgnoreGDEF = true;
|
|
}
|
|
if (aFontEntry->mFamilyName.IsEmpty()) {
|
|
aFontEntry->mFamilyName = Name();
|
|
} else {
|
|
MOZ_ASSERT(aFontEntry->mFamilyName.Equals(Name()));
|
|
}
|
|
aFontEntry->mSkipDefaultFeatureSpaceCheck = mSkipDefaultFeatureSpaceCheck;
|
|
mAvailableFonts.AppendElement(aFontEntry);
|
|
|
|
// If we're adding a face to a family that has been marked as "simple",
|
|
// we need to ensure any null entries are removed, as well as clearing
|
|
// the flag (which may be set again later).
|
|
if (mIsSimpleFamily) {
|
|
for (size_t i = mAvailableFonts.Length() - 1; i-- > 0; ) {
|
|
if (!mAvailableFonts[i]) {
|
|
mAvailableFonts.RemoveElementAt(i);
|
|
}
|
|
}
|
|
mIsSimpleFamily = false;
|
|
}
|
|
}
|
|
|
|
// note that the styles for this family have been added
|
|
bool HasStyles() { return mHasStyles; }
|
|
void SetHasStyles(bool aHasStyles) { mHasStyles = aHasStyles; }
|
|
|
|
// choose a specific face to match a style using CSS font matching
|
|
// rules (weight matching occurs here). may return a face that doesn't
|
|
// precisely match (e.g. normal face when no italic face exists).
|
|
// aNeedsSyntheticBold is set to true when synthetic bolding is
|
|
// needed, false otherwise
|
|
gfxFontEntry *FindFontForStyle(const gfxFontStyle& aFontStyle,
|
|
bool& aNeedsSyntheticBold,
|
|
bool aIgnoreSizeTolerance = false);
|
|
|
|
virtual void
|
|
FindAllFontsForStyle(const gfxFontStyle& aFontStyle,
|
|
nsTArray<gfxFontEntry*>& aFontEntryList,
|
|
bool& aNeedsSyntheticBold,
|
|
bool aIgnoreSizeTolerance = false);
|
|
|
|
// checks for a matching font within the family
|
|
// used as part of the font fallback process
|
|
void FindFontForChar(GlobalFontMatch *aMatchData);
|
|
|
|
// checks all fonts for a matching font within the family
|
|
void SearchAllFontsForChar(GlobalFontMatch *aMatchData);
|
|
|
|
// read in other family names, if any, and use functor to add each into cache
|
|
virtual void ReadOtherFamilyNames(gfxPlatformFontList *aPlatformFontList);
|
|
|
|
// helper method for reading localized family names from the name table
|
|
// of a single face
|
|
static void ReadOtherFamilyNamesForFace(const nsAString& aFamilyName,
|
|
const char *aNameData,
|
|
uint32_t aDataLength,
|
|
nsTArray<nsString>& aOtherFamilyNames,
|
|
bool useFullName);
|
|
|
|
// set when other family names have been read in
|
|
void SetOtherFamilyNamesInitialized() {
|
|
mOtherFamilyNamesInitialized = true;
|
|
}
|
|
|
|
// read in other localized family names, fullnames and Postscript names
|
|
// for all faces and append to lookup tables
|
|
virtual void ReadFaceNames(gfxPlatformFontList *aPlatformFontList,
|
|
bool aNeedFullnamePostscriptNames,
|
|
FontInfoData *aFontInfoData = nullptr);
|
|
|
|
// find faces belonging to this family (platform implementations override this;
|
|
// should be made pure virtual once all subclasses have been updated)
|
|
virtual void FindStyleVariations(FontInfoData *aFontInfoData = nullptr) { }
|
|
|
|
// search for a specific face using the Postscript name
|
|
gfxFontEntry* FindFont(const nsAString& aPostscriptName);
|
|
|
|
// read in cmaps for all the faces
|
|
void ReadAllCMAPs(FontInfoData *aFontInfoData = nullptr);
|
|
|
|
bool TestCharacterMap(uint32_t aCh) {
|
|
if (!mFamilyCharacterMapInitialized) {
|
|
ReadAllCMAPs();
|
|
}
|
|
return mFamilyCharacterMap.test(aCh);
|
|
}
|
|
|
|
void ResetCharacterMap() {
|
|
mFamilyCharacterMap.reset();
|
|
mFamilyCharacterMapInitialized = false;
|
|
}
|
|
|
|
// mark this family as being in the "bad" underline offset blacklist
|
|
void SetBadUnderlineFamily() {
|
|
mIsBadUnderlineFamily = true;
|
|
if (mHasStyles) {
|
|
SetBadUnderlineFonts();
|
|
}
|
|
}
|
|
|
|
bool IsBadUnderlineFamily() const { return mIsBadUnderlineFamily; }
|
|
bool CheckForFallbackFaces() const { return mCheckForFallbackFaces; }
|
|
|
|
// sort available fonts to put preferred (standard) faces towards the end
|
|
void SortAvailableFonts();
|
|
|
|
// check whether the family fits into the simple 4-face model,
|
|
// so we can use simplified style-matching;
|
|
// if so set the mIsSimpleFamily flag (defaults to False before we've checked)
|
|
void CheckForSimpleFamily();
|
|
|
|
// For memory reporter
|
|
virtual void AddSizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf,
|
|
FontListSizes* aSizes) const;
|
|
virtual void AddSizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf,
|
|
FontListSizes* aSizes) const;
|
|
|
|
#ifdef DEBUG
|
|
// Only used for debugging checks - does a linear search
|
|
bool ContainsFace(gfxFontEntry* aFontEntry);
|
|
#endif
|
|
|
|
void SetSkipSpaceFeatureCheck(bool aSkipCheck) {
|
|
mSkipDefaultFeatureSpaceCheck = aSkipCheck;
|
|
}
|
|
|
|
// Check whether this family is appropriate to include in the Preferences
|
|
// font list for the given langGroup and CSS generic, if the platform lets
|
|
// us determine this.
|
|
// Return true if the family should be included in the list, false to omit.
|
|
// Default implementation returns true for everything, so no filtering
|
|
// will occur; individual platforms may override.
|
|
virtual bool FilterForFontList(nsAtom* aLangGroup,
|
|
const nsACString& aGeneric) const {
|
|
return true;
|
|
}
|
|
|
|
protected:
|
|
// Protected destructor, to discourage deletion outside of Release():
|
|
virtual ~gfxFontFamily();
|
|
|
|
bool ReadOtherFamilyNamesForFace(gfxPlatformFontList *aPlatformFontList,
|
|
hb_blob_t *aNameTable,
|
|
bool useFullName = false);
|
|
|
|
// set whether this font family is in "bad" underline offset blacklist.
|
|
void SetBadUnderlineFonts() {
|
|
uint32_t i, numFonts = mAvailableFonts.Length();
|
|
for (i = 0; i < numFonts; i++) {
|
|
if (mAvailableFonts[i]) {
|
|
mAvailableFonts[i]->mIsBadUnderlineFont = true;
|
|
}
|
|
}
|
|
}
|
|
|
|
nsString mName;
|
|
nsTArray<RefPtr<gfxFontEntry> > mAvailableFonts;
|
|
gfxSparseBitSet mFamilyCharacterMap;
|
|
bool mOtherFamilyNamesInitialized : 1;
|
|
bool mHasOtherFamilyNames : 1;
|
|
bool mFaceNamesInitialized : 1;
|
|
bool mHasStyles : 1;
|
|
bool mIsSimpleFamily : 1;
|
|
bool mIsBadUnderlineFamily : 1;
|
|
bool mFamilyCharacterMapInitialized : 1;
|
|
bool mSkipDefaultFeatureSpaceCheck : 1;
|
|
bool mCheckForFallbackFaces : 1; // check other faces for character
|
|
bool mCheckedForLegacyFamilyNames : 1;
|
|
|
|
enum {
|
|
// for "simple" families, the faces are stored in mAvailableFonts
|
|
// with fixed positions:
|
|
kRegularFaceIndex = 0,
|
|
kBoldFaceIndex = 1,
|
|
kItalicFaceIndex = 2,
|
|
kBoldItalicFaceIndex = 3,
|
|
// mask values for selecting face with bold and/or italic attributes
|
|
kBoldMask = 0x01,
|
|
kItalicMask = 0x02
|
|
};
|
|
};
|
|
|
|
#endif
|