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gecko-dev/gfx/thebes/gfxPlatformFontList.cpp

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/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
* 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/. */
#ifdef MOZ_LOGGING
#define FORCE_PR_LOG /* Allow logging in the release build */
#endif
#include "prlog.h"
#include "gfxPlatformFontList.h"
#include "gfxUserFontSet.h"
#include "nsUnicharUtils.h"
#include "nsUnicodeRange.h"
#include "nsUnicodeProperties.h"
#include "mozilla/Attributes.h"
#include "mozilla/Likely.h"
#include "mozilla/MemoryReporting.h"
#include "mozilla/Preferences.h"
#include "mozilla/Telemetry.h"
#include "mozilla/TimeStamp.h"
#include "mozilla/gfx/2D.h"
using namespace mozilla;
#ifdef PR_LOGGING
#define LOG_FONTLIST(args) PR_LOG(gfxPlatform::GetLog(eGfxLog_fontlist), \
PR_LOG_DEBUG, args)
#define LOG_FONTLIST_ENABLED() PR_LOG_TEST( \
gfxPlatform::GetLog(eGfxLog_fontlist), \
PR_LOG_DEBUG)
#define LOG_FONTINIT(args) PR_LOG(gfxPlatform::GetLog(eGfxLog_fontinit), \
PR_LOG_DEBUG, args)
#define LOG_FONTINIT_ENABLED() PR_LOG_TEST( \
gfxPlatform::GetLog(eGfxLog_fontinit), \
PR_LOG_DEBUG)
#endif // PR_LOGGING
gfxPlatformFontList *gfxPlatformFontList::sPlatformFontList = nullptr;
// Character ranges that require complex-script shaping support in the font,
// and so should be masked out by ReadCMAP if the necessary layout tables
// are not present.
// Currently used by the Mac and FT2 implementations only, but probably should
// be supported on Windows as well.
const gfxFontEntry::ScriptRange gfxPlatformFontList::sComplexScriptRanges[] = {
// Actually, now that harfbuzz supports presentation-forms shaping for
// Arabic, we can render it without layout tables. So maybe we don't
// want to mask the basic Arabic block here?
// This affects the arabic-fallback-*.html reftests, which rely on
// loading a font that *doesn't* have any GSUB table.
{ 0x0600, 0x06FF, { TRUETYPE_TAG('a','r','a','b'), 0, 0 } },
{ 0x0700, 0x074F, { TRUETYPE_TAG('s','y','r','c'), 0, 0 } },
{ 0x0750, 0x077F, { TRUETYPE_TAG('a','r','a','b'), 0, 0 } },
{ 0x08A0, 0x08FF, { TRUETYPE_TAG('a','r','a','b'), 0, 0 } },
{ 0x0900, 0x097F, { TRUETYPE_TAG('d','e','v','2'),
TRUETYPE_TAG('d','e','v','a'), 0 } },
{ 0x0980, 0x09FF, { TRUETYPE_TAG('b','n','g','2'),
TRUETYPE_TAG('b','e','n','g'), 0 } },
{ 0x0A00, 0x0A7F, { TRUETYPE_TAG('g','u','r','2'),
TRUETYPE_TAG('g','u','r','u'), 0 } },
{ 0x0A80, 0x0AFF, { TRUETYPE_TAG('g','j','r','2'),
TRUETYPE_TAG('g','u','j','r'), 0 } },
{ 0x0B00, 0x0B7F, { TRUETYPE_TAG('o','r','y','2'),
TRUETYPE_TAG('o','r','y','a'), 0 } },
{ 0x0B80, 0x0BFF, { TRUETYPE_TAG('t','m','l','2'),
TRUETYPE_TAG('t','a','m','l'), 0 } },
{ 0x0C00, 0x0C7F, { TRUETYPE_TAG('t','e','l','2'),
TRUETYPE_TAG('t','e','l','u'), 0 } },
{ 0x0C80, 0x0CFF, { TRUETYPE_TAG('k','n','d','2'),
TRUETYPE_TAG('k','n','d','a'), 0 } },
{ 0x0D00, 0x0D7F, { TRUETYPE_TAG('m','l','m','2'),
TRUETYPE_TAG('m','l','y','m'), 0 } },
{ 0x0D80, 0x0DFF, { TRUETYPE_TAG('s','i','n','h'), 0, 0 } },
{ 0x0E80, 0x0EFF, { TRUETYPE_TAG('l','a','o',' '), 0, 0 } },
{ 0x0F00, 0x0FFF, { TRUETYPE_TAG('t','i','b','t'), 0, 0 } },
{ 0x1000, 0x109f, { TRUETYPE_TAG('m','y','m','r'),
TRUETYPE_TAG('m','y','m','2'), 0 } },
{ 0x1780, 0x17ff, { TRUETYPE_TAG('k','h','m','r'), 0, 0 } },
// Khmer Symbols (19e0..19ff) don't seem to need any special shaping
{ 0xaa60, 0xaa7f, { TRUETYPE_TAG('m','y','m','r'),
TRUETYPE_TAG('m','y','m','2'), 0 } },
// Thai seems to be "renderable" without AAT morphing tables
{ 0, 0, { 0, 0, 0 } } // terminator
};
// prefs for the font info loader
#define FONT_LOADER_FAMILIES_PER_SLICE_PREF "gfx.font_loader.families_per_slice"
#define FONT_LOADER_DELAY_PREF "gfx.font_loader.delay"
#define FONT_LOADER_INTERVAL_PREF "gfx.font_loader.interval"
static const char* kObservedPrefs[] = {
"font.",
"font.name-list.",
"intl.accept_languages", // hmmmm...
nullptr
};
class gfxFontListPrefObserver MOZ_FINAL : public nsIObserver {
~gfxFontListPrefObserver() {}
public:
NS_DECL_ISUPPORTS
NS_DECL_NSIOBSERVER
};
static gfxFontListPrefObserver* gFontListPrefObserver = nullptr;
NS_IMPL_ISUPPORTS(gfxFontListPrefObserver, nsIObserver)
NS_IMETHODIMP
gfxFontListPrefObserver::Observe(nsISupports *aSubject,
const char *aTopic,
const char16_t *aData)
{
NS_ASSERTION(!strcmp(aTopic, NS_PREFBRANCH_PREFCHANGE_TOPIC_ID), "invalid topic");
// XXX this could be made to only clear out the cache for the prefs that were changed
// but it probably isn't that big a deal.
gfxPlatformFontList::PlatformFontList()->ClearPrefFonts();
gfxFontCache::GetCache()->AgeAllGenerations();
return NS_OK;
}
MOZ_DEFINE_MALLOC_SIZE_OF(FontListMallocSizeOf)
NS_IMPL_ISUPPORTS(gfxPlatformFontList::MemoryReporter, nsIMemoryReporter)
NS_IMETHODIMP
gfxPlatformFontList::MemoryReporter::CollectReports(
nsIMemoryReporterCallback* aCb, nsISupports* aClosure, bool aAnonymize)
{
FontListSizes sizes;
sizes.mFontListSize = 0;
sizes.mFontTableCacheSize = 0;
sizes.mCharMapsSize = 0;
gfxPlatformFontList::PlatformFontList()->AddSizeOfIncludingThis(&FontListMallocSizeOf,
&sizes);
nsresult rv;
rv = aCb->Callback(EmptyCString(),
NS_LITERAL_CSTRING("explicit/gfx/font-list"),
KIND_HEAP, UNITS_BYTES, sizes.mFontListSize,
NS_LITERAL_CSTRING("Memory used to manage the list of font families and faces."),
aClosure);
NS_ENSURE_SUCCESS(rv, rv);
rv = aCb->Callback(EmptyCString(),
NS_LITERAL_CSTRING("explicit/gfx/font-charmaps"),
KIND_HEAP, UNITS_BYTES, sizes.mCharMapsSize,
NS_LITERAL_CSTRING("Memory used to record the character coverage of individual fonts."),
aClosure);
NS_ENSURE_SUCCESS(rv, rv);
if (sizes.mFontTableCacheSize) {
aCb->Callback(EmptyCString(),
NS_LITERAL_CSTRING("explicit/gfx/font-tables"),
KIND_HEAP, UNITS_BYTES, sizes.mFontTableCacheSize,
NS_LITERAL_CSTRING("Memory used for cached font metrics and layout tables."),
aClosure);
}
return NS_OK;
}
gfxPlatformFontList::gfxPlatformFontList(bool aNeedFullnamePostscriptNames)
: mFontFamilies(100), mOtherFamilyNames(30),
mPrefFonts(10), mBadUnderlineFamilyNames(10), mSharedCmaps(16),
mStartIndex(0), mIncrement(1), mNumFamilies(0)
{
mOtherFamilyNamesInitialized = false;
if (aNeedFullnamePostscriptNames) {
mExtraNames = new ExtraNames();
}
mFaceNameListsInitialized = false;
LoadBadUnderlineList();
// pref changes notification setup
NS_ASSERTION(!gFontListPrefObserver,
"There has been font list pref observer already");
gFontListPrefObserver = new gfxFontListPrefObserver();
NS_ADDREF(gFontListPrefObserver);
Preferences::AddStrongObservers(gFontListPrefObserver, kObservedPrefs);
RegisterStrongMemoryReporter(new MemoryReporter());
}
gfxPlatformFontList::~gfxPlatformFontList()
{
mSharedCmaps.Clear();
NS_ASSERTION(gFontListPrefObserver, "There is no font list pref observer");
Preferences::RemoveObservers(gFontListPrefObserver, kObservedPrefs);
NS_RELEASE(gFontListPrefObserver);
}
nsresult
gfxPlatformFontList::InitFontList()
{
mFontFamilies.Clear();
mOtherFamilyNames.Clear();
mOtherFamilyNamesInitialized = false;
if (mExtraNames) {
mExtraNames->mFullnames.Clear();
mExtraNames->mPostscriptNames.Clear();
}
mFaceNameListsInitialized = false;
mPrefFonts.Clear();
mReplacementCharFallbackFamily = nullptr;
CancelLoader();
// initialize ranges of characters for which system-wide font search should be skipped
mCodepointsWithNoFonts.reset();
mCodepointsWithNoFonts.SetRange(0,0x1f); // C0 controls
mCodepointsWithNoFonts.SetRange(0x7f,0x9f); // C1 controls
sPlatformFontList = this;
return NS_OK;
}
void
gfxPlatformFontList::GenerateFontListKey(const nsAString& aKeyName, nsAString& aResult)
{
aResult = aKeyName;
ToLowerCase(aResult);
}
struct InitOtherNamesData {
InitOtherNamesData(gfxPlatformFontList *aFontList,
TimeStamp aStartTime)
: mFontList(aFontList), mStartTime(aStartTime), mTimedOut(false)
{}
gfxPlatformFontList *mFontList;
TimeStamp mStartTime;
bool mTimedOut;
};
void
gfxPlatformFontList::InitOtherFamilyNames()
{
if (mOtherFamilyNamesInitialized) {
return;
}
TimeStamp start = TimeStamp::Now();
// iterate over all font families and read in other family names
InitOtherNamesData otherNamesData(this, start);
mFontFamilies.Enumerate(gfxPlatformFontList::InitOtherFamilyNamesProc,
&otherNamesData);
if (!otherNamesData.mTimedOut) {
mOtherFamilyNamesInitialized = true;
}
TimeStamp end = TimeStamp::Now();
Telemetry::AccumulateTimeDelta(Telemetry::FONTLIST_INITOTHERFAMILYNAMES,
start, end);
#ifdef PR_LOGGING
if (LOG_FONTINIT_ENABLED()) {
TimeDuration elapsed = end - start;
LOG_FONTINIT(("(fontinit) InitOtherFamilyNames took %8.2f ms %s",
elapsed.ToMilliseconds(),
(otherNamesData.mTimedOut ? "timeout" : "")));
}
#endif
}
#define OTHERNAMES_TIMEOUT 200
PLDHashOperator
gfxPlatformFontList::InitOtherFamilyNamesProc(nsStringHashKey::KeyType aKey,
nsRefPtr<gfxFontFamily>& aFamilyEntry,
void* userArg)
{
InitOtherNamesData *data = static_cast<InitOtherNamesData*>(userArg);
aFamilyEntry->ReadOtherFamilyNames(data->mFontList);
TimeDuration elapsed = TimeStamp::Now() - data->mStartTime;
if (elapsed.ToMilliseconds() > OTHERNAMES_TIMEOUT) {
data->mTimedOut = true;
return PL_DHASH_STOP;
}
return PL_DHASH_NEXT;
}
struct ReadFaceNamesData {
ReadFaceNamesData(gfxPlatformFontList *aFontList, TimeStamp aStartTime)
: mFontList(aFontList), mStartTime(aStartTime), mTimedOut(false),
mFirstChar(0)
{}
gfxPlatformFontList *mFontList;
TimeStamp mStartTime;
bool mTimedOut;
// if mFirstChar is not 0, only load facenames for families
// that start with this character
char16_t mFirstChar;
};
gfxFontEntry*
gfxPlatformFontList::SearchFamiliesForFaceName(const nsAString& aFaceName)
{
TimeStamp start = TimeStamp::Now();
gfxFontEntry *lookup = nullptr;
ReadFaceNamesData faceNameListsData(this, start);
// iterate over familes starting with the same letter
faceNameListsData.mFirstChar = ToLowerCase(aFaceName.CharAt(0));
mFontFamilies.Enumerate(gfxPlatformFontList::ReadFaceNamesProc,
&faceNameListsData);
lookup = FindFaceName(aFaceName);
TimeStamp end = TimeStamp::Now();
Telemetry::AccumulateTimeDelta(Telemetry::FONTLIST_INITFACENAMELISTS,
start, end);
#ifdef PR_LOGGING
if (LOG_FONTINIT_ENABLED()) {
TimeDuration elapsed = end - start;
LOG_FONTINIT(("(fontinit) SearchFamiliesForFaceName took %8.2f ms %s %s",
elapsed.ToMilliseconds(),
(lookup ? "found name" : ""),
(faceNameListsData.mTimedOut ? "timeout" : "")));
}
#endif
return lookup;
}
// time limit for loading facename lists (ms)
#define NAMELIST_TIMEOUT 200
PLDHashOperator
gfxPlatformFontList::ReadFaceNamesProc(nsStringHashKey::KeyType aKey,
nsRefPtr<gfxFontFamily>& aFamilyEntry,
void* userArg)
{
ReadFaceNamesData *data = static_cast<ReadFaceNamesData*>(userArg);
gfxPlatformFontList *fc = data->mFontList;
// when filtering, skip names that don't start with the filter character
if (data->mFirstChar && ToLowerCase(aKey.CharAt(0)) != data->mFirstChar) {
return PL_DHASH_NEXT;
}
aFamilyEntry->ReadFaceNames(fc, fc->NeedFullnamePostscriptNames());
TimeDuration elapsed = TimeStamp::Now() - data->mStartTime;
if (elapsed.ToMilliseconds() > NAMELIST_TIMEOUT) {
data->mTimedOut = true;
return PL_DHASH_STOP;
}
return PL_DHASH_NEXT;
}
gfxFontEntry*
gfxPlatformFontList::FindFaceName(const nsAString& aFaceName)
{
gfxFontEntry *lookup;
// lookup in name lookup tables, return null if not found
if (mExtraNames &&
((lookup = mExtraNames->mPostscriptNames.GetWeak(aFaceName)) ||
(lookup = mExtraNames->mFullnames.GetWeak(aFaceName)))) {
return lookup;
}
return nullptr;
}
gfxFontEntry*
gfxPlatformFontList::LookupInFaceNameLists(const nsAString& aFaceName)
{
gfxFontEntry *lookup = nullptr;
// initialize facename lookup tables if needed
// note: this can terminate early or time out, in which case
// mFaceNameListsInitialized remains false
if (!mFaceNameListsInitialized) {
lookup = SearchFamiliesForFaceName(aFaceName);
if (lookup) {
return lookup;
}
}
// lookup in name lookup tables, return null if not found
if (!(lookup = FindFaceName(aFaceName))) {
// names not completely initialized, so keep track of lookup misses
if (!mFaceNameListsInitialized) {
if (!mFaceNamesMissed) {
mFaceNamesMissed = new nsTHashtable<nsStringHashKey>(4);
}
mFaceNamesMissed->PutEntry(aFaceName);
}
}
return lookup;
}
void
gfxPlatformFontList::PreloadNamesList()
{
nsAutoTArray<nsString, 10> preloadFonts;
gfxFontUtils::GetPrefsFontList("font.preload-names-list", preloadFonts);
uint32_t numFonts = preloadFonts.Length();
for (uint32_t i = 0; i < numFonts; i++) {
nsAutoString key;
GenerateFontListKey(preloadFonts[i], key);
// only search canonical names!
gfxFontFamily *familyEntry = mFontFamilies.GetWeak(key);
if (familyEntry) {
familyEntry->ReadOtherFamilyNames(this);
}
}
}
void
gfxPlatformFontList::LoadBadUnderlineList()
{
nsAutoTArray<nsString, 10> blacklist;
gfxFontUtils::GetPrefsFontList("font.blacklist.underline_offset", blacklist);
uint32_t numFonts = blacklist.Length();
for (uint32_t i = 0; i < numFonts; i++) {
nsAutoString key;
GenerateFontListKey(blacklist[i], key);
mBadUnderlineFamilyNames.PutEntry(key);
}
}
static PLDHashOperator
RebuildLocalFonts(nsPtrHashKey<gfxUserFontSet>* aKey,
void* aClosure)
{
aKey->GetKey()->RebuildLocalRules();
return PL_DHASH_NEXT;
}
void
gfxPlatformFontList::UpdateFontList()
{
InitFontList();
mUserFontSetList.EnumerateEntries(RebuildLocalFonts, nullptr);
}
struct FontListData {
FontListData(nsIAtom *aLangGroup,
const nsACString& aGenericFamily,
nsTArray<nsString>& aListOfFonts) :
mLangGroup(aLangGroup), mGenericFamily(aGenericFamily),
mListOfFonts(aListOfFonts) {}
nsIAtom *mLangGroup;
const nsACString& mGenericFamily;
nsTArray<nsString>& mListOfFonts;
};
PLDHashOperator
gfxPlatformFontList::HashEnumFuncForFamilies(nsStringHashKey::KeyType aKey,
nsRefPtr<gfxFontFamily>& aFamilyEntry,
void *aUserArg)
{
FontListData *data = static_cast<FontListData*>(aUserArg);
// use the first variation for now. This data should be the same
// for all the variations and should probably be moved up to
// the Family
gfxFontStyle style;
style.language = data->mLangGroup;
bool needsBold;
nsRefPtr<gfxFontEntry> aFontEntry = aFamilyEntry->FindFontForStyle(style, needsBold);
NS_ASSERTION(aFontEntry, "couldn't find any font entry in family");
if (!aFontEntry)
return PL_DHASH_NEXT;
/* skip symbol fonts */
if (aFontEntry->IsSymbolFont())
return PL_DHASH_NEXT;
if (aFontEntry->SupportsLangGroup(data->mLangGroup) &&
aFontEntry->MatchesGenericFamily(data->mGenericFamily)) {
nsAutoString localizedFamilyName;
aFamilyEntry->LocalizedName(localizedFamilyName);
data->mListOfFonts.AppendElement(localizedFamilyName);
}
return PL_DHASH_NEXT;
}
void
gfxPlatformFontList::GetFontList(nsIAtom *aLangGroup,
const nsACString& aGenericFamily,
nsTArray<nsString>& aListOfFonts)
{
FontListData data(aLangGroup, aGenericFamily, aListOfFonts);
mFontFamilies.Enumerate(gfxPlatformFontList::HashEnumFuncForFamilies, &data);
aListOfFonts.Sort();
aListOfFonts.Compact();
}
struct FontFamilyListData {
FontFamilyListData(nsTArray<nsRefPtr<gfxFontFamily> >& aFamilyArray)
: mFamilyArray(aFamilyArray)
{}
static PLDHashOperator AppendFamily(nsStringHashKey::KeyType aKey,
nsRefPtr<gfxFontFamily>& aFamilyEntry,
void *aUserArg)
{
FontFamilyListData *data = static_cast<FontFamilyListData*>(aUserArg);
data->mFamilyArray.AppendElement(aFamilyEntry);
return PL_DHASH_NEXT;
}
nsTArray<nsRefPtr<gfxFontFamily> >& mFamilyArray;
};
void
gfxPlatformFontList::GetFontFamilyList(nsTArray<nsRefPtr<gfxFontFamily> >& aFamilyArray)
{
FontFamilyListData data(aFamilyArray);
mFontFamilies.Enumerate(FontFamilyListData::AppendFamily, &data);
}
gfxFontEntry*
gfxPlatformFontList::SystemFindFontForChar(const uint32_t aCh,
int32_t aRunScript,
const gfxFontStyle* aStyle)
{
gfxFontEntry* fontEntry = nullptr;
// is codepoint with no matching font? return null immediately
if (mCodepointsWithNoFonts.test(aCh)) {
return nullptr;
}
// Try to short-circuit font fallback for U+FFFD, used to represent
// encoding errors: just use cached family from last time U+FFFD was seen.
// This helps speed up pages with lots of encoding errors, binary-as-text,
// etc.
if (aCh == 0xFFFD && mReplacementCharFallbackFamily) {
bool needsBold; // ignored in the system fallback case
fontEntry =
mReplacementCharFallbackFamily->FindFontForStyle(*aStyle,
needsBold);
// this should never fail, as we must have found U+FFFD in order to set
// mReplacementCharFallbackFamily at all, but better play it safe
if (fontEntry && fontEntry->TestCharacterMap(aCh)) {
return fontEntry;
}
}
TimeStamp start = TimeStamp::Now();
// search commonly available fonts
bool common = true;
gfxFontFamily *fallbackFamily = nullptr;
fontEntry = CommonFontFallback(aCh, aRunScript, aStyle, &fallbackFamily);
// if didn't find a font, do system-wide fallback (except for specials)
uint32_t cmapCount = 0;
if (!fontEntry) {
common = false;
fontEntry = GlobalFontFallback(aCh, aRunScript, aStyle, cmapCount,
&fallbackFamily);
}
TimeDuration elapsed = TimeStamp::Now() - start;
#ifdef PR_LOGGING
PRLogModuleInfo *log = gfxPlatform::GetLog(eGfxLog_textrun);
if (MOZ_UNLIKELY(PR_LOG_TEST(log, PR_LOG_WARNING))) {
uint32_t unicodeRange = FindCharUnicodeRange(aCh);
int32_t script = mozilla::unicode::GetScriptCode(aCh);
PR_LOG(log, PR_LOG_WARNING,\
("(textrun-systemfallback-%s) char: u+%6.6x "
"unicode-range: %d script: %d match: [%s]"
" time: %dus cmaps: %d\n",
(common ? "common" : "global"), aCh,
unicodeRange, script,
(fontEntry ? NS_ConvertUTF16toUTF8(fontEntry->Name()).get() :
"<none>"),
int32_t(elapsed.ToMicroseconds()),
cmapCount));
}
#endif
// no match? add to set of non-matching codepoints
if (!fontEntry) {
mCodepointsWithNoFonts.set(aCh);
} else if (aCh == 0xFFFD && fontEntry && fallbackFamily) {
mReplacementCharFallbackFamily = fallbackFamily;
}
// track system fallback time
static bool first = true;
int32_t intElapsed = int32_t(first ? elapsed.ToMilliseconds() :
elapsed.ToMicroseconds());
Telemetry::Accumulate((first ? Telemetry::SYSTEM_FONT_FALLBACK_FIRST :
Telemetry::SYSTEM_FONT_FALLBACK),
intElapsed);
first = false;
// track the script for which fallback occurred (incremented one make it
// 1-based)
Telemetry::Accumulate(Telemetry::SYSTEM_FONT_FALLBACK_SCRIPT, aRunScript + 1);
return fontEntry;
}
PLDHashOperator
gfxPlatformFontList::FindFontForCharProc(nsStringHashKey::KeyType aKey, nsRefPtr<gfxFontFamily>& aFamilyEntry,
void *userArg)
{
GlobalFontMatch *data = static_cast<GlobalFontMatch*>(userArg);
// evaluate all fonts in this family for a match
aFamilyEntry->FindFontForChar(data);
return PL_DHASH_NEXT;
}
#define NUM_FALLBACK_FONTS 8
gfxFontEntry*
gfxPlatformFontList::CommonFontFallback(const uint32_t aCh,
int32_t aRunScript,
const gfxFontStyle* aMatchStyle,
gfxFontFamily** aMatchedFamily)
{
nsAutoTArray<const char*,NUM_FALLBACK_FONTS> defaultFallbacks;
uint32_t i, numFallbacks;
gfxPlatform::GetPlatform()->GetCommonFallbackFonts(aCh, aRunScript,
defaultFallbacks);
numFallbacks = defaultFallbacks.Length();
for (i = 0; i < numFallbacks; i++) {
nsAutoString familyName;
const char *fallbackFamily = defaultFallbacks[i];
familyName.AppendASCII(fallbackFamily);
gfxFontFamily *fallback =
gfxPlatformFontList::PlatformFontList()->FindFamily(familyName);
if (!fallback)
continue;
gfxFontEntry *fontEntry;
bool needsBold; // ignored in the system fallback case
// use first font in list that supports a given character
fontEntry = fallback->FindFontForStyle(*aMatchStyle, needsBold);
if (fontEntry && fontEntry->TestCharacterMap(aCh)) {
*aMatchedFamily = fallback;
return fontEntry;
}
}
return nullptr;
}
gfxFontEntry*
gfxPlatformFontList::GlobalFontFallback(const uint32_t aCh,
int32_t aRunScript,
const gfxFontStyle* aMatchStyle,
uint32_t& aCmapCount,
gfxFontFamily** aMatchedFamily)
{
// otherwise, try to find it among local fonts
GlobalFontMatch data(aCh, aRunScript, aMatchStyle);
// iterate over all font families to find a font that support the character
mFontFamilies.Enumerate(gfxPlatformFontList::FindFontForCharProc, &data);
aCmapCount = data.mCmapsTested;
*aMatchedFamily = data.mMatchedFamily;
return data.mBestMatch;
}
#ifdef XP_WIN
#include <windows.h>
// crude hack for using when monitoring process
static void LogRegistryEvent(const wchar_t *msg)
{
HKEY dummyKey;
HRESULT hr;
wchar_t buf[512];
wsprintfW(buf, L" log %s", msg);
hr = RegOpenKeyExW(HKEY_LOCAL_MACHINE, buf, 0, KEY_READ, &dummyKey);
if (SUCCEEDED(hr)) {
RegCloseKey(dummyKey);
}
}
#endif
gfxFontFamily*
gfxPlatformFontList::CheckFamily(gfxFontFamily *aFamily)
{
if (aFamily && !aFamily->HasStyles()) {
aFamily->FindStyleVariations();
aFamily->CheckForSimpleFamily();
}
if (aFamily && aFamily->GetFontList().Length() == 0) {
// failed to load any faces for this family, so discard it
nsAutoString key;
GenerateFontListKey(aFamily->Name(), key);
mFontFamilies.Remove(key);
return nullptr;
}
return aFamily;
}
gfxFontFamily*
gfxPlatformFontList::FindFamily(const nsAString& aFamily)
{
nsAutoString key;
gfxFontFamily *familyEntry;
GenerateFontListKey(aFamily, key);
NS_ASSERTION(mFontFamilies.Count() != 0, "system font list was not initialized correctly");
// lookup in canonical (i.e. English) family name list
if ((familyEntry = mFontFamilies.GetWeak(key))) {
return CheckFamily(familyEntry);
}
// lookup in other family names list (mostly localized names)
if ((familyEntry = mOtherFamilyNames.GetWeak(key)) != nullptr) {
return CheckFamily(familyEntry);
}
// name not found and other family names not yet fully initialized so
// initialize the rest of the list and try again. this is done lazily
// since reading name table entries is expensive.
// although ASCII localized family names are possible they don't occur
// in practice so avoid pulling in names at startup
if (!mOtherFamilyNamesInitialized && !IsASCII(aFamily)) {
InitOtherFamilyNames();
if ((familyEntry = mOtherFamilyNames.GetWeak(key)) != nullptr) {
return CheckFamily(familyEntry);
} else if (!mOtherFamilyNamesInitialized) {
// localized family names load timed out, add name to list of
// names to check after localized names are loaded
if (!mOtherNamesMissed) {
mOtherNamesMissed = new nsTHashtable<nsStringHashKey>(4);
}
mOtherNamesMissed->PutEntry(key);
}
}
return nullptr;
}
gfxFontEntry*
gfxPlatformFontList::FindFontForFamily(const nsAString& aFamily, const gfxFontStyle* aStyle, bool& aNeedsBold)
{
gfxFontFamily *familyEntry = FindFamily(aFamily);
aNeedsBold = false;
if (familyEntry)
return familyEntry->FindFontForStyle(*aStyle, aNeedsBold);
return nullptr;
}
bool
gfxPlatformFontList::GetPrefFontFamilyEntries(eFontPrefLang aLangGroup, nsTArray<nsRefPtr<gfxFontFamily> > *array)
{
return mPrefFonts.Get(uint32_t(aLangGroup), array);
}
void
gfxPlatformFontList::SetPrefFontFamilyEntries(eFontPrefLang aLangGroup, nsTArray<nsRefPtr<gfxFontFamily> >& array)
{
mPrefFonts.Put(uint32_t(aLangGroup), array);
}
void
gfxPlatformFontList::AddOtherFamilyName(gfxFontFamily *aFamilyEntry, nsAString& aOtherFamilyName)
{
nsAutoString key;
GenerateFontListKey(aOtherFamilyName, key);
if (!mOtherFamilyNames.GetWeak(key)) {
mOtherFamilyNames.Put(key, aFamilyEntry);
#ifdef PR_LOGGING
LOG_FONTLIST(("(fontlist-otherfamily) canonical family: %s, "
"other family: %s\n",
NS_ConvertUTF16toUTF8(aFamilyEntry->Name()).get(),
NS_ConvertUTF16toUTF8(aOtherFamilyName).get()));
#endif
if (mBadUnderlineFamilyNames.Contains(key))
aFamilyEntry->SetBadUnderlineFamily();
}
}
void
gfxPlatformFontList::AddFullname(gfxFontEntry *aFontEntry, nsAString& aFullname)
{
if (!mExtraNames->mFullnames.GetWeak(aFullname)) {
mExtraNames->mFullnames.Put(aFullname, aFontEntry);
#ifdef PR_LOGGING
LOG_FONTLIST(("(fontlist-fullname) name: %s, fullname: %s\n",
NS_ConvertUTF16toUTF8(aFontEntry->Name()).get(),
NS_ConvertUTF16toUTF8(aFullname).get()));
#endif
}
}
void
gfxPlatformFontList::AddPostscriptName(gfxFontEntry *aFontEntry, nsAString& aPostscriptName)
{
if (!mExtraNames->mPostscriptNames.GetWeak(aPostscriptName)) {
mExtraNames->mPostscriptNames.Put(aPostscriptName, aFontEntry);
#ifdef PR_LOGGING
LOG_FONTLIST(("(fontlist-postscript) name: %s, psname: %s\n",
NS_ConvertUTF16toUTF8(aFontEntry->Name()).get(),
NS_ConvertUTF16toUTF8(aPostscriptName).get()));
#endif
}
}
bool
gfxPlatformFontList::GetStandardFamilyName(const nsAString& aFontName, nsAString& aFamilyName)
{
aFamilyName.Truncate();
gfxFontFamily *ff = FindFamily(aFontName);
if (!ff) {
return false;
}
aFamilyName.Assign(ff->Name());
return true;
}
gfxCharacterMap*
gfxPlatformFontList::FindCharMap(gfxCharacterMap *aCmap)
{
aCmap->CalcHash();
gfxCharacterMap *cmap = AddCmap(aCmap);
cmap->mShared = true;
return cmap;
}
// add a cmap to the shared cmap set
gfxCharacterMap*
gfxPlatformFontList::AddCmap(const gfxCharacterMap* aCharMap)
{
CharMapHashKey *found =
mSharedCmaps.PutEntry(const_cast<gfxCharacterMap*>(aCharMap));
return found->GetKey();
}
// remove the cmap from the shared cmap set
void
gfxPlatformFontList::RemoveCmap(const gfxCharacterMap* aCharMap)
{
// skip lookups during teardown
if (mSharedCmaps.Count() == 0) {
return;
}
// cmap needs to match the entry *and* be the same ptr before removing
CharMapHashKey *found =
mSharedCmaps.GetEntry(const_cast<gfxCharacterMap*>(aCharMap));
if (found && found->GetKey() == aCharMap) {
mSharedCmaps.RemoveEntry(const_cast<gfxCharacterMap*>(aCharMap));
}
}
static PLDHashOperator AppendFamilyToList(nsStringHashKey::KeyType aKey,
nsRefPtr<gfxFontFamily>& aFamilyEntry,
void *aUserArg)
{
nsTArray<nsString> *familyNames = static_cast<nsTArray<nsString> *>(aUserArg);
familyNames->AppendElement(aFamilyEntry->Name());
return PL_DHASH_NEXT;
}
void
gfxPlatformFontList::GetFontFamilyNames(nsTArray<nsString>& aFontFamilyNames)
{
mFontFamilies.Enumerate(AppendFamilyToList, &aFontFamilyNames);
}
void
gfxPlatformFontList::InitLoader()
{
GetFontFamilyNames(mFontInfo->mFontFamiliesToLoad);
mStartIndex = 0;
mNumFamilies = mFontInfo->mFontFamiliesToLoad.Length();
memset(&(mFontInfo->mLoadStats), 0, sizeof(mFontInfo->mLoadStats));
}
#define FONT_LOADER_MAX_TIMESLICE 100 // max time for one pass through RunLoader = 100ms
bool
gfxPlatformFontList::LoadFontInfo()
{
TimeStamp start = TimeStamp::Now();
uint32_t i, endIndex = mNumFamilies;
bool loadCmaps = !UsesSystemFallback() ||
gfxPlatform::GetPlatform()->UseCmapsDuringSystemFallback();
// for each font family, load in various font info
for (i = mStartIndex; i < endIndex; i++) {
nsAutoString key;
gfxFontFamily *familyEntry;
GenerateFontListKey(mFontInfo->mFontFamiliesToLoad[i], key);
// lookup in canonical (i.e. English) family name list
if (!(familyEntry = mFontFamilies.GetWeak(key))) {
continue;
}
// read in face names
familyEntry->ReadFaceNames(this, NeedFullnamePostscriptNames(), mFontInfo);
// load the cmaps if needed
if (loadCmaps) {
familyEntry->ReadAllCMAPs(mFontInfo);
}
// limit the time spent reading fonts in one pass
TimeDuration elapsed = TimeStamp::Now() - start;
if (elapsed.ToMilliseconds() > FONT_LOADER_MAX_TIMESLICE &&
i + 1 != endIndex) {
endIndex = i + 1;
break;
}
}
mStartIndex = endIndex;
bool done = mStartIndex >= mNumFamilies;
#ifdef PR_LOGGING
if (LOG_FONTINIT_ENABLED()) {
TimeDuration elapsed = TimeStamp::Now() - start;
LOG_FONTINIT(("(fontinit) fontloader load pass %8.2f ms done %s\n",
elapsed.ToMilliseconds(), (done ? "true" : "false")));
}
#endif
if (done) {
mOtherFamilyNamesInitialized = true;
mFaceNameListsInitialized = true;
}
return done;
}
struct LookupMissedFaceNamesData {
LookupMissedFaceNamesData(gfxPlatformFontList *aFontList)
: mFontList(aFontList), mFoundName(false) {}
gfxPlatformFontList *mFontList;
bool mFoundName;
};
/*static*/ PLDHashOperator
gfxPlatformFontList::LookupMissedFaceNamesProc(nsStringHashKey *aKey,
void *aUserArg)
{
LookupMissedFaceNamesData *data =
reinterpret_cast<LookupMissedFaceNamesData*>(aUserArg);
if (data->mFontList->FindFaceName(aKey->GetKey())) {
data->mFoundName = true;
return PL_DHASH_STOP;
}
return PL_DHASH_NEXT;
}
struct LookupMissedOtherNamesData {
LookupMissedOtherNamesData(gfxPlatformFontList *aFontList)
: mFontList(aFontList), mFoundName(false) {}
gfxPlatformFontList *mFontList;
bool mFoundName;
};
/*static*/ PLDHashOperator
gfxPlatformFontList::LookupMissedOtherNamesProc(nsStringHashKey *aKey,
void *aUserArg)
{
LookupMissedOtherNamesData *data =
reinterpret_cast<LookupMissedOtherNamesData*>(aUserArg);
if (data->mFontList->FindFamily(aKey->GetKey())) {
data->mFoundName = true;
return PL_DHASH_STOP;
}
return PL_DHASH_NEXT;
}
void
gfxPlatformFontList::CleanupLoader()
{
mFontFamiliesToLoad.Clear();
mNumFamilies = 0;
bool rebuilt = false, forceReflow = false;
// if had missed face names that are now available, force reflow all
if (mFaceNamesMissed &&
mFaceNamesMissed->Count() != 0) {
LookupMissedFaceNamesData namedata(this);
mFaceNamesMissed->EnumerateEntries(LookupMissedFaceNamesProc, &namedata);
if (namedata.mFoundName) {
rebuilt = true;
mUserFontSetList.EnumerateEntries(RebuildLocalFonts, nullptr);
}
mFaceNamesMissed = nullptr;
}
if (mOtherNamesMissed) {
LookupMissedOtherNamesData othernamesdata(this);
mOtherNamesMissed->EnumerateEntries(LookupMissedOtherNamesProc,
&othernamesdata);
mOtherNamesMissed = nullptr;
if (othernamesdata.mFoundName) {
forceReflow = true;
ForceGlobalReflow();
}
}
#ifdef PR_LOGGING
if (LOG_FONTINIT_ENABLED() && mFontInfo) {
LOG_FONTINIT(("(fontinit) fontloader load thread took %8.2f ms "
"%d families %d fonts %d cmaps "
"%d facenames %d othernames %s %s",
mLoadTime.ToMilliseconds(),
mFontInfo->mLoadStats.families,
mFontInfo->mLoadStats.fonts,
mFontInfo->mLoadStats.cmaps,
mFontInfo->mLoadStats.facenames,
mFontInfo->mLoadStats.othernames,
(rebuilt ? "(userfont sets rebuilt)" : ""),
(forceReflow ? "(global reflow)" : "")));
}
#endif
gfxFontInfoLoader::CleanupLoader();
}
void
gfxPlatformFontList::GetPrefsAndStartLoader()
{
mIncrement =
std::max(1u, Preferences::GetUint(FONT_LOADER_FAMILIES_PER_SLICE_PREF));
uint32_t delay =
std::max(1u, Preferences::GetUint(FONT_LOADER_DELAY_PREF));
uint32_t interval =
std::max(1u, Preferences::GetUint(FONT_LOADER_INTERVAL_PREF));
StartLoader(delay, interval);
}
void
gfxPlatformFontList::ForceGlobalReflow()
{
// modify a preference that will trigger reflow everywhere
static const char kPrefName[] = "font.internaluseonly.changed";
bool fontInternalChange = Preferences::GetBool(kPrefName, false);
Preferences::SetBool(kPrefName, !fontInternalChange);
}
// Support for memory reporting
static size_t
SizeOfFamilyEntryExcludingThis(const nsAString& aKey,
const nsRefPtr<gfxFontFamily>& aFamily,
MallocSizeOf aMallocSizeOf,
void* aUserArg)
{
FontListSizes *sizes = static_cast<FontListSizes*>(aUserArg);
aFamily->AddSizeOfExcludingThis(aMallocSizeOf, sizes);
sizes->mFontListSize += aKey.SizeOfExcludingThisIfUnshared(aMallocSizeOf);
// we return zero here because the measurements have been added directly
// to the relevant fields of the FontListSizes record
return 0;
}
// this is also used by subclasses that hold additional hashes of family names
/*static*/ size_t
gfxPlatformFontList::SizeOfFamilyNameEntryExcludingThis
(const nsAString& aKey,
const nsRefPtr<gfxFontFamily>& aFamily,
MallocSizeOf aMallocSizeOf,
void* aUserArg)
{
// we don't count the size of the family here, because this is an *extra*
// reference to a family that will have already been counted in the main list
return aKey.SizeOfExcludingThisIfUnshared(aMallocSizeOf);
}
static size_t
SizeOfFontNameEntryExcludingThis(const nsAString& aKey,
const nsRefPtr<gfxFontEntry>& aFont,
MallocSizeOf aMallocSizeOf,
void* aUserArg)
{
// the font itself is counted by its owning family; here we only care about
// the name stored in the hashtable key
return aKey.SizeOfExcludingThisIfUnshared(aMallocSizeOf);
}
static size_t
SizeOfPrefFontEntryExcludingThis
(const uint32_t& aKey,
const nsTArray<nsRefPtr<gfxFontFamily> >& aList,
MallocSizeOf aMallocSizeOf,
void* aUserArg)
{
// again, we only care about the size of the array itself; we don't follow
// the refPtrs stored in it, because they point to entries already owned
// and accounted-for by the main font list
return aList.SizeOfExcludingThis(aMallocSizeOf);
}
static size_t
SizeOfStringEntryExcludingThis(nsStringHashKey* aHashEntry,
MallocSizeOf aMallocSizeOf,
void* aUserArg)
{
return aHashEntry->GetKey().SizeOfExcludingThisIfUnshared(aMallocSizeOf);
}
static size_t
SizeOfSharedCmapExcludingThis(CharMapHashKey* aHashEntry,
MallocSizeOf aMallocSizeOf,
void* aUserArg)
{
FontListSizes *sizes = static_cast<FontListSizes*>(aUserArg);
uint32_t size = aHashEntry->GetKey()->SizeOfIncludingThis(aMallocSizeOf);
sizes->mCharMapsSize += size;
// we return zero here because the measurements have been added directly
// to the relevant fields of the FontListSizes record
return 0;
}
void
gfxPlatformFontList::AddSizeOfExcludingThis(MallocSizeOf aMallocSizeOf,
FontListSizes* aSizes) const
{
aSizes->mFontListSize +=
mFontFamilies.SizeOfExcludingThis(SizeOfFamilyEntryExcludingThis,
aMallocSizeOf, aSizes);
aSizes->mFontListSize +=
mOtherFamilyNames.SizeOfExcludingThis(SizeOfFamilyNameEntryExcludingThis,
aMallocSizeOf);
if (mExtraNames) {
aSizes->mFontListSize +=
mExtraNames->mFullnames.SizeOfExcludingThis(SizeOfFontNameEntryExcludingThis,
aMallocSizeOf);
aSizes->mFontListSize +=
mExtraNames->mPostscriptNames.SizeOfExcludingThis(SizeOfFontNameEntryExcludingThis,
aMallocSizeOf);
}
aSizes->mFontListSize +=
mCodepointsWithNoFonts.SizeOfExcludingThis(aMallocSizeOf);
aSizes->mFontListSize +=
mFontFamiliesToLoad.SizeOfExcludingThis(aMallocSizeOf);
aSizes->mFontListSize +=
mPrefFonts.SizeOfExcludingThis(SizeOfPrefFontEntryExcludingThis,
aMallocSizeOf);
aSizes->mFontListSize +=
mBadUnderlineFamilyNames.SizeOfExcludingThis(SizeOfStringEntryExcludingThis,
aMallocSizeOf);
aSizes->mFontListSize +=
mSharedCmaps.SizeOfExcludingThis(SizeOfSharedCmapExcludingThis,
aMallocSizeOf, aSizes);
}
void
gfxPlatformFontList::AddSizeOfIncludingThis(MallocSizeOf aMallocSizeOf,
FontListSizes* aSizes) const
{
aSizes->mFontListSize += aMallocSizeOf(this);
AddSizeOfExcludingThis(aMallocSizeOf, aSizes);
}
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