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gfxFT2FontList.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/. */
#include "mozilla/ArrayUtils.h"
#include "mozilla/Base64.h"
#include "mozilla/MemoryReporting.h"
#include "mozilla/dom/ContentChild.h"
#include "gfxAndroidPlatform.h"
#include "mozilla/Omnijar.h"
#include "nsAutoPtr.h"
#include "nsIInputStream.h"
#define gfxToolkitPlatform gfxAndroidPlatform
#include "nsXULAppAPI.h"
#include <dirent.h>
#include <android/log.h>
#define ALOG(args...) __android_log_print(ANDROID_LOG_INFO, "Gecko" , ## args)
#include "ft2build.h"
#include FT_FREETYPE_H
#include FT_TRUETYPE_TAGS_H
#include FT_TRUETYPE_TABLES_H
#include "cairo-ft.h"
#include "gfxFT2FontList.h"
#include "gfxFT2Fonts.h"
#include "gfxUserFontSet.h"
#include "gfxFontUtils.h"
#include "nsServiceManagerUtils.h"
#include "nsTArray.h"
#include "nsUnicharUtils.h"
#include "nsDirectoryServiceUtils.h"
#include "nsDirectoryServiceDefs.h"
#include "nsAppDirectoryServiceDefs.h"
#include "nsISimpleEnumerator.h"
#include "nsIMemory.h"
#include "gfxFontConstants.h"
#include "mozilla/Preferences.h"
#include "mozilla/scache/StartupCache.h"
#include <fcntl.h>
#include <sys/mman.h>
#include <sys/stat.h>
using namespace mozilla;
static PRLogModuleInfo *
GetFontInfoLog()
{
static PRLogModuleInfo *sLog;
if (!sLog)
sLog = PR_NewLogModule("fontInfoLog");
return sLog;
}
#undef LOG
#define LOG(args) MOZ_LOG(GetFontInfoLog(), mozilla::LogLevel::Debug, args)
#define LOG_ENABLED() MOZ_LOG_TEST(GetFontInfoLog(), mozilla::LogLevel::Debug)
static cairo_user_data_key_t sFTUserFontDataKey;
static __inline void
BuildKeyNameFromFontName(nsAString &aName)
{
ToLowerCase(aName);
}
// Helper to access the FT_Face for a given FT2FontEntry,
// creating a temporary face if the entry does not have one yet.
// This allows us to read font names, tables, etc if necessary
// without permanently instantiating a freetype face and consuming
// memory long-term.
// This may fail (resulting in a null FT_Face), e.g. if it fails to
// allocate memory to uncompress a font from omnijar.
class AutoFTFace {
public:
AutoFTFace(FT2FontEntry* aFontEntry)
: mFace(nullptr), mFontDataBuf(nullptr), mOwnsFace(false)
{
if (aFontEntry->mFTFace) {
mFace = aFontEntry->mFTFace;
return;
}
NS_ASSERTION(!aFontEntry->mFilename.IsEmpty(),
"can't use AutoFTFace for fonts without a filename");
FT_Library ft = gfxToolkitPlatform::GetPlatform()->GetFTLibrary();
// A relative path (no initial "/") means this is a resource in
// omnijar, not an installed font on the device.
// The NS_ASSERTIONs here should never fail, as the resource must have
// been read successfully during font-list initialization or we'd never
// have created the font entry. The only legitimate runtime failure
// here would be memory allocation, in which case mFace remains null.
if (aFontEntry->mFilename[0] != '/') {
nsRefPtr<nsZipArchive> reader =
Omnijar::GetReader(Omnijar::Type::GRE);
nsZipItem *item = reader->GetItem(aFontEntry->mFilename.get());
NS_ASSERTION(item, "failed to find zip entry");
uint32_t bufSize = item->RealSize();
mFontDataBuf = static_cast<uint8_t*>(malloc(bufSize));
if (mFontDataBuf) {
nsZipCursor cursor(item, reader, mFontDataBuf, bufSize);
cursor.Copy(&bufSize);
NS_ASSERTION(bufSize == item->RealSize(),
"error reading bundled font");
if (FT_Err_Ok != FT_New_Memory_Face(ft, mFontDataBuf, bufSize,
aFontEntry->mFTFontIndex,
&mFace)) {
NS_WARNING("failed to create freetype face");
}
}
} else {
if (FT_Err_Ok != FT_New_Face(ft, aFontEntry->mFilename.get(),
aFontEntry->mFTFontIndex, &mFace)) {
NS_WARNING("failed to create freetype face");
}
}
if (FT_Err_Ok != FT_Select_Charmap(mFace, FT_ENCODING_UNICODE)) {
NS_WARNING("failed to select Unicode charmap");
}
mOwnsFace = true;
}
~AutoFTFace() {
if (mFace && mOwnsFace) {
FT_Done_Face(mFace);
if (mFontDataBuf) {
free(mFontDataBuf);
}
}
}
operator FT_Face() { return mFace; }
// If we 'forget' the FT_Face (used when ownership is handed over to Cairo),
// we do -not- free the mFontDataBuf (if used); that also becomes the
// responsibility of the new owner of the face.
FT_Face forget() {
NS_ASSERTION(mOwnsFace, "can't forget() when we didn't own the face");
mOwnsFace = false;
return mFace;
}
const uint8_t* FontData() const { return mFontDataBuf; }
private:
FT_Face mFace;
uint8_t* mFontDataBuf; // Uncompressed data (for fonts stored in a JAR),
// or null for fonts instantiated from a file.
// If non-null, this must survive as long as the
// FT_Face.
bool mOwnsFace;
};
/*
* FT2FontEntry
* gfxFontEntry subclass corresponding to a specific face that can be
* rendered by freetype. This is associated with a face index in a
* file (normally a .ttf/.otf file holding a single face, but in principle
* there could be .ttc files with multiple faces).
* The FT2FontEntry can create the necessary FT_Face on demand, and can
* then create a Cairo font_face and scaled_font for drawing.
*/
cairo_scaled_font_t *
FT2FontEntry::CreateScaledFont(const gfxFontStyle *aStyle)
{
cairo_font_face_t *cairoFace = CairoFontFace();
if (!cairoFace) {
return nullptr;
}
cairo_scaled_font_t *scaledFont = nullptr;
cairo_matrix_t sizeMatrix;
cairo_matrix_t identityMatrix;
// XXX deal with adjusted size
cairo_matrix_init_scale(&sizeMatrix, aStyle->size, aStyle->size);
cairo_matrix_init_identity(&identityMatrix);
// synthetic oblique by skewing via the font matrix
bool needsOblique = !IsItalic() &&
(aStyle->style & (NS_FONT_STYLE_ITALIC | NS_FONT_STYLE_OBLIQUE)) &&
aStyle->allowSyntheticStyle;
if (needsOblique) {
cairo_matrix_t style;
cairo_matrix_init(&style,
1, //xx
0, //yx
-1 * OBLIQUE_SKEW_FACTOR, //xy
1, //yy
0, //x0
0); //y0
cairo_matrix_multiply(&sizeMatrix, &sizeMatrix, &style);
}
cairo_font_options_t *fontOptions = cairo_font_options_create();
if (gfxPlatform::GetPlatform()->RequiresLinearZoom()) {
cairo_font_options_set_hint_metrics(fontOptions, CAIRO_HINT_METRICS_OFF);
}
scaledFont = cairo_scaled_font_create(cairoFace,
&sizeMatrix,
&identityMatrix, fontOptions);
cairo_font_options_destroy(fontOptions);
NS_ASSERTION(cairo_scaled_font_status(scaledFont) == CAIRO_STATUS_SUCCESS,
"Failed to make scaled font");
return scaledFont;
}
FT2FontEntry::~FT2FontEntry()
{
// Do nothing for mFTFace here since FTFontDestroyFunc is called by cairo.
mFTFace = nullptr;
#ifndef ANDROID
if (mFontFace) {
cairo_font_face_destroy(mFontFace);
mFontFace = nullptr;
}
#endif
}
gfxFont*
FT2FontEntry::CreateFontInstance(const gfxFontStyle *aFontStyle, bool aNeedsBold)
{
cairo_scaled_font_t *scaledFont = CreateScaledFont(aFontStyle);
if (!scaledFont) {
return nullptr;
}
gfxFont *font = new gfxFT2Font(scaledFont, this, aFontStyle, aNeedsBold);
cairo_scaled_font_destroy(scaledFont);
return font;
}
/* static */
FT2FontEntry*
FT2FontEntry::CreateFontEntry(const nsAString& aFontName,
uint16_t aWeight,
int16_t aStretch,
bool aItalic,
const uint8_t* aFontData,
uint32_t aLength)
{
// Ownership of aFontData is passed in here; the fontEntry must
// retain it as long as the FT_Face needs it, and ensure it is
// eventually deleted.
FT_Face face;
FT_Error error =
FT_New_Memory_Face(gfxToolkitPlatform::GetPlatform()->GetFTLibrary(),
aFontData, aLength, 0, &face);
if (error != FT_Err_Ok) {
free((void*)aFontData);
return nullptr;
}
if (FT_Err_Ok != FT_Select_Charmap(face, FT_ENCODING_UNICODE)) {
FT_Done_Face(face);
free((void*)aFontData);
return nullptr;
}
// Create our FT2FontEntry, which inherits the name of the userfont entry
// as it's not guaranteed that the face has valid names (bug 737315)
FT2FontEntry* fe =
FT2FontEntry::CreateFontEntry(face, nullptr, 0, aFontName,
aFontData);
if (fe) {
fe->mItalic = aItalic;
fe->mWeight = aWeight;
fe->mStretch = aStretch;
fe->mIsDataUserFont = true;
}
return fe;
}
class FTUserFontData {
public:
FTUserFontData(FT_Face aFace, const uint8_t* aData)
: mFace(aFace), mFontData(aData)
{
}
~FTUserFontData()
{
FT_Done_Face(mFace);
if (mFontData) {
free((void*)mFontData);
}
}
const uint8_t *FontData() const { return mFontData; }
private:
FT_Face mFace;
const uint8_t *mFontData;
};
static void
FTFontDestroyFunc(void *data)
{
FTUserFontData *userFontData = static_cast<FTUserFontData*>(data);
delete userFontData;
}
/* static */
FT2FontEntry*
FT2FontEntry::CreateFontEntry(const FontListEntry& aFLE)
{
FT2FontEntry *fe = new FT2FontEntry(aFLE.faceName());
fe->mFilename = aFLE.filepath();
fe->mFTFontIndex = aFLE.index();
fe->mWeight = aFLE.weight();
fe->mStretch = aFLE.stretch();
fe->mItalic = aFLE.italic();
return fe;
}
// Helpers to extract font entry properties from an FT_Face
static bool
FTFaceIsItalic(FT_Face aFace)
{
return !!(aFace->style_flags & FT_STYLE_FLAG_ITALIC);
}
static uint16_t
FTFaceGetWeight(FT_Face aFace)
{
TT_OS2 *os2 = static_cast<TT_OS2*>(FT_Get_Sfnt_Table(aFace, ft_sfnt_os2));
uint16_t os2weight = 0;
if (os2 && os2->version != 0xffff) {
// Technically, only 100 to 900 are valid, but some fonts
// have this set wrong -- e.g. "Microsoft Logo Bold Italic" has
// it set to 6 instead of 600. We try to be nice and handle that
// as well.
if (os2->usWeightClass >= 100 && os2->usWeightClass <= 900) {
os2weight = os2->usWeightClass;
} else if (os2->usWeightClass >= 1 && os2->usWeightClass <= 9) {
os2weight = os2->usWeightClass * 100;
}
}
uint16_t result;
if (os2weight != 0) {
result = os2weight;
} else if (aFace->style_flags & FT_STYLE_FLAG_BOLD) {
result = 700;
} else {
result = 400;
}
NS_ASSERTION(result >= 100 && result <= 900, "Invalid weight in font!");
return result;
}
// Used to create the font entry for installed faces on the device,
// when iterating over the fonts directories.
// We use the FT_Face to retrieve the details needed for the font entry,
// but unless we have been passed font data (i.e. for a user font),
// we do *not* save a reference to it, nor create a cairo face,
// as we don't want to keep a freetype face for every installed font
// permanently in memory.
/* static */
FT2FontEntry*
FT2FontEntry::CreateFontEntry(FT_Face aFace,
const char* aFilename, uint8_t aIndex,
const nsAString& aName,
const uint8_t* aFontData)
{
FT2FontEntry *fe = new FT2FontEntry(aName);
fe->mItalic = FTFaceIsItalic(aFace);
fe->mWeight = FTFaceGetWeight(aFace);
fe->mFilename = aFilename;
fe->mFTFontIndex = aIndex;
if (aFontData) {
fe->mFTFace = aFace;
int flags = gfxPlatform::GetPlatform()->FontHintingEnabled() ?
FT_LOAD_DEFAULT :
(FT_LOAD_NO_AUTOHINT | FT_LOAD_NO_HINTING);
fe->mFontFace = cairo_ft_font_face_create_for_ft_face(aFace, flags);
FTUserFontData *userFontData = new FTUserFontData(aFace, aFontData);
cairo_font_face_set_user_data(fe->mFontFace, &sFTUserFontDataKey,
userFontData, FTFontDestroyFunc);
}
return fe;
}
// construct font entry name for an installed font from names in the FT_Face,
// and then create our FT2FontEntry
static FT2FontEntry*
CreateNamedFontEntry(FT_Face aFace, const char* aFilename, uint8_t aIndex)
{
if (!aFace->family_name) {
return nullptr;
}
nsAutoString fontName;
AppendUTF8toUTF16(aFace->family_name, fontName);
if (aFace->style_name && strcmp("Regular", aFace->style_name)) {
fontName.Append(' ');
AppendUTF8toUTF16(aFace->style_name, fontName);
}
return FT2FontEntry::CreateFontEntry(aFace, aFilename, aIndex, fontName);
}
FT2FontEntry*
gfxFT2Font::GetFontEntry()
{
return static_cast<FT2FontEntry*> (mFontEntry.get());
}
cairo_font_face_t *
FT2FontEntry::CairoFontFace()
{
if (!mFontFace) {
AutoFTFace face(this);
if (!face) {
return nullptr;
}
mFTFace = face.forget();
int flags = gfxPlatform::GetPlatform()->FontHintingEnabled() ?
FT_LOAD_DEFAULT :
(FT_LOAD_NO_AUTOHINT | FT_LOAD_NO_HINTING);
mFontFace = cairo_ft_font_face_create_for_ft_face(face, flags);
FTUserFontData *userFontData = new FTUserFontData(face, face.FontData());
cairo_font_face_set_user_data(mFontFace, &sFTUserFontDataKey,
userFontData, FTFontDestroyFunc);
}
return mFontFace;
}
// Copied/modified from similar code in gfxMacPlatformFontList.mm:
// Complex scripts will not render correctly unless Graphite or OT
// layout tables are present.
// For OpenType, we also check that the GSUB table supports the relevant
// script tag, to avoid using things like Arial Unicode MS for Lao (it has
// the characters, but lacks OpenType support).
// TODO: consider whether we should move this to gfxFontEntry and do similar
// cmap-masking on all platforms to avoid using fonts that won't shape
// properly.
nsresult
FT2FontEntry::ReadCMAP(FontInfoData *aFontInfoData)
{
if (mCharacterMap) {
return NS_OK;
}
nsRefPtr<gfxCharacterMap> charmap = new gfxCharacterMap();
AutoFallibleTArray<uint8_t,16384> buffer;
nsresult rv = CopyFontTable(TTAG_cmap, buffer);
if (NS_SUCCEEDED(rv)) {
bool unicodeFont;
bool symbolFont;
rv = gfxFontUtils::ReadCMAP(buffer.Elements(), buffer.Length(),
*charmap, mUVSOffset,
unicodeFont, symbolFont);
}
if (NS_SUCCEEDED(rv) && !HasGraphiteTables()) {
// We assume a Graphite font knows what it's doing,
// and provides whatever shaping is needed for the
// characters it supports, so only check/clear the
// complex-script ranges for non-Graphite fonts
// for layout support, check for the presence of opentype layout tables
bool hasGSUB = HasFontTable(TRUETYPE_TAG('G','S','U','B'));
for (const ScriptRange* sr = gfxPlatformFontList::sComplexScriptRanges;
sr->rangeStart; sr++) {
// check to see if the cmap includes complex script codepoints
if (charmap->TestRange(sr->rangeStart, sr->rangeEnd)) {
// We check for GSUB here, as GPOS alone would not be ok.
if (hasGSUB && SupportsScriptInGSUB(sr->tags)) {
continue;
}
charmap->ClearRange(sr->rangeStart, sr->rangeEnd);
}
}
}
#ifdef MOZ_WIDGET_ANDROID
// Hack for the SamsungDevanagari font, bug 1012365:
// pretend the font supports U+0972.
if (!charmap->test(0x0972) &&
charmap->test(0x0905) && charmap->test(0x0945)) {
charmap->set(0x0972);
}
#endif
mHasCmapTable = NS_SUCCEEDED(rv);
if (mHasCmapTable) {
gfxPlatformFontList *pfl = gfxPlatformFontList::PlatformFontList();
mCharacterMap = pfl->FindCharMap(charmap);
} else {
// if error occurred, initialize to null cmap
mCharacterMap = new gfxCharacterMap();
}
return rv;
}
nsresult
FT2FontEntry::CopyFontTable(uint32_t aTableTag,
FallibleTArray<uint8_t>& aBuffer)
{
AutoFTFace face(this);
if (!face) {
return NS_ERROR_FAILURE;
}
FT_Error status;
FT_ULong len = 0;
status = FT_Load_Sfnt_Table(face, aTableTag, 0, nullptr, &len);
if (status != FT_Err_Ok || len == 0) {
return NS_ERROR_FAILURE;
}
if (!aBuffer.SetLength(len, fallible)) {
return NS_ERROR_OUT_OF_MEMORY;
}
uint8_t *buf = aBuffer.Elements();
status = FT_Load_Sfnt_Table(face, aTableTag, 0, buf, &len);
NS_ENSURE_TRUE(status == FT_Err_Ok, NS_ERROR_FAILURE);
return NS_OK;
}
hb_blob_t*
FT2FontEntry::GetFontTable(uint32_t aTableTag)
{
if (mFontFace) {
// if there's a cairo font face, we may be able to return a blob
// that just wraps a range of the attached user font data
FTUserFontData *userFontData = static_cast<FTUserFontData*>(
cairo_font_face_get_user_data(mFontFace, &sFTUserFontDataKey));
if (userFontData && userFontData->FontData()) {
return GetTableFromFontData(userFontData->FontData(), aTableTag);
}
}
// otherwise, use the default method (which in turn will call our
// implementation of CopyFontTable)
return gfxFontEntry::GetFontTable(aTableTag);
}
void
FT2FontEntry::AddSizeOfExcludingThis(MallocSizeOf aMallocSizeOf,
FontListSizes* aSizes) const
{
gfxFontEntry::AddSizeOfExcludingThis(aMallocSizeOf, aSizes);
aSizes->mFontListSize +=
mFilename.SizeOfExcludingThisIfUnshared(aMallocSizeOf);
}
void
FT2FontEntry::AddSizeOfIncludingThis(MallocSizeOf aMallocSizeOf,
FontListSizes* aSizes) const
{
aSizes->mFontListSize += aMallocSizeOf(this);
AddSizeOfExcludingThis(aMallocSizeOf, aSizes);
}
/*
* FT2FontFamily
* A standard gfxFontFamily; just adds a method used to support sending
* the font list from chrome to content via IPC.
*/
void
FT2FontFamily::AddFacesToFontList(InfallibleTArray<FontListEntry>* aFontList,
Visibility aVisibility)
{
for (int i = 0, n = mAvailableFonts.Length(); i < n; ++i) {
const FT2FontEntry *fe =
static_cast<const FT2FontEntry*>(mAvailableFonts[i].get());
if (!fe) {
continue;
}
aFontList->AppendElement(FontListEntry(Name(), fe->Name(),
fe->mFilename,
fe->Weight(), fe->Stretch(),
fe->IsItalic(),
fe->mFTFontIndex,
aVisibility == kHidden));
}
}
/*
* Startup cache support for the font list:
* We store the list of families and faces, with their style attributes and the
* corresponding font files, in the startup cache.
* This allows us to recreate the gfxFT2FontList collection of families and
* faces without instantiating Freetype faces for each font file (in order to
* find their attributes), leading to significantly quicker startup.
*/
#define CACHE_KEY "font.cached-list"
class FontNameCache {
public:
FontNameCache()
: mMap(&mOps, sizeof(FNCMapEntry), 0)
, mWriteNeeded(false)
{
// HACK ALERT: it's weird to assign |mOps| after we passed a pointer to
// it to |mMap|'s constructor. A more normal approach here would be to
// have a static |sOps| member. Unfortunately, this mysteriously but
// consistently makes Fennec start-up slower, so we take this
// unorthodox approach instead. It's safe because PLDHashTable's
// constructor doesn't dereference the pointer; it just makes a copy of
// it.
mOps = (PLDHashTableOps) {
StringHash,
HashMatchEntry,
MoveEntry,
PLDHashTable::ClearEntryStub,
nullptr
};
MOZ_ASSERT(XRE_IsParentProcess(),
"StartupCacheFontNameCache should only be used in chrome "
"process");
mCache = mozilla::scache::StartupCache::GetSingleton();
Init();
}
~FontNameCache()
{
if (!mWriteNeeded || !mCache) {
return;
}
nsAutoCString buf;
for (auto iter = mMap.Iter(); !iter.Done(); iter.Next()) {
auto entry = static_cast<FNCMapEntry*>(iter.Get());
if (!entry->mFileExists) {
// skip writing entries for files that are no longer present
continue;
}
buf.Append(entry->mFilename);
buf.Append(';');
buf.Append(entry->mFaces);
buf.Append(';');
buf.AppendInt(entry->mTimestamp);
buf.Append(';');
buf.AppendInt(entry->mFilesize);
buf.Append(';');
}
mCache->PutBuffer(CACHE_KEY, buf.get(), buf.Length() + 1);
}
void Init()
{
if (!mCache) {
return;
}
uint32_t size;
char* buf;
if (NS_FAILED(mCache->GetBuffer(CACHE_KEY, &buf, &size))) {
return;
}
LOG(("got: %s from the cache", nsDependentCString(buf, size).get()));
const char* beginning = buf;
const char* end = strchr(beginning, ';');
while (end) {
nsCString filename(beginning, end - beginning);
beginning = end + 1;
if (!(end = strchr(beginning, ';'))) {
break;
}
nsCString faceList(beginning, end - beginning);
beginning = end + 1;
if (!(end = strchr(beginning, ';'))) {
break;
}
uint32_t timestamp = strtoul(beginning, nullptr, 10);
beginning = end + 1;
if (!(end = strchr(beginning, ';'))) {
break;
}
uint32_t filesize = strtoul(beginning, nullptr, 10);
auto mapEntry =
static_cast<FNCMapEntry*>(mMap.Add(filename.get(), fallible));
if (mapEntry) {
mapEntry->mFilename.Assign(filename);
mapEntry->mTimestamp = timestamp;
mapEntry->mFilesize = filesize;
mapEntry->mFaces.Assign(faceList);
// entries from the startupcache are marked "non-existing"
// until we have confirmed that the file still exists
mapEntry->mFileExists = false;
}
beginning = end + 1;
end = strchr(beginning, ';');
}
// Should we use free() or delete[] here? See bug 684700.
free(buf);
}
virtual void
GetInfoForFile(const nsCString& aFileName, nsCString& aFaceList,
uint32_t *aTimestamp, uint32_t *aFilesize)
{
auto entry = static_cast<FNCMapEntry*>(mMap.Search(aFileName.get()));
if (entry) {
*aTimestamp = entry->mTimestamp;
*aFilesize = entry->mFilesize;
aFaceList.Assign(entry->mFaces);
// this entry does correspond to an existing file
// (although it might not be up-to-date, in which case
// it will get overwritten via CacheFileInfo)
entry->mFileExists = true;
}
}
virtual void
CacheFileInfo(const nsCString& aFileName, const nsCString& aFaceList,
uint32_t aTimestamp, uint32_t aFilesize)
{
auto entry =
static_cast<FNCMapEntry*>(mMap.Add(aFileName.get(), fallible));
if (entry) {
entry->mFilename.Assign(aFileName);
entry->mTimestamp = aTimestamp;
entry->mFilesize = aFilesize;
entry->mFaces.Assign(aFaceList);
entry->mFileExists = true;
}
mWriteNeeded = true;
}
private:
mozilla::scache::StartupCache* mCache;
PLDHashTable mMap;
bool mWriteNeeded;
PLDHashTableOps mOps;
typedef struct : public PLDHashEntryHdr {
public:
nsCString mFilename;
uint32_t mTimestamp;
uint32_t mFilesize;
nsCString mFaces;
bool mFileExists;
} FNCMapEntry;
static PLDHashNumber StringHash(PLDHashTable *table, const void *key)
{
return HashString(reinterpret_cast<const char*>(key));
}
static bool HashMatchEntry(PLDHashTable *table,
const PLDHashEntryHdr *aHdr, const void *key)
{
const FNCMapEntry* entry =
static_cast<const FNCMapEntry*>(aHdr);
return entry->mFilename.Equals(reinterpret_cast<const char*>(key));
}
static void MoveEntry(PLDHashTable *table, const PLDHashEntryHdr *aFrom,
PLDHashEntryHdr *aTo)
{
FNCMapEntry* to = static_cast<FNCMapEntry*>(aTo);
const FNCMapEntry* from = static_cast<const FNCMapEntry*>(aFrom);
to->mFilename.Assign(from->mFilename);
to->mTimestamp = from->mTimestamp;
to->mFilesize = from->mFilesize;
to->mFaces.Assign(from->mFaces);
to->mFileExists = from->mFileExists;
}
};
/***************************************************************
*
* gfxFT2FontList
*
*/
// For Mobile, we use gfxFT2Fonts, and we build the font list by directly
// scanning the system's Fonts directory for OpenType and TrueType files.
gfxFT2FontList::gfxFT2FontList()
{
}
void
gfxFT2FontList::AppendFacesFromCachedFaceList(
const nsCString& aFileName,
const nsCString& aFaceList,
StandardFile aStdFile,
FT2FontFamily::Visibility aVisibility)
{
const char *beginning = aFaceList.get();
const char *end = strchr(beginning, ',');
while (end) {
nsString familyName =
NS_ConvertUTF8toUTF16(beginning, end - beginning);
ToLowerCase(familyName);
beginning = end + 1;
if (!(end = strchr(beginning, ','))) {
break;
}
nsString faceName =
NS_ConvertUTF8toUTF16(beginning, end - beginning);
beginning = end + 1;
if (!(end = strchr(beginning, ','))) {
break;
}
uint32_t index = strtoul(beginning, nullptr, 10);
beginning = end + 1;
if (!(end = strchr(beginning, ','))) {
break;
}
bool italic = (*beginning != '0');
beginning = end + 1;
if (!(end = strchr(beginning, ','))) {
break;
}
uint32_t weight = strtoul(beginning, nullptr, 10);
beginning = end + 1;
if (!(end = strchr(beginning, ','))) {
break;
}
int32_t stretch = strtol(beginning, nullptr, 10);
FontListEntry fle(familyName, faceName, aFileName,
weight, stretch, italic, index,
aVisibility == FT2FontFamily::kHidden);
AppendFaceFromFontListEntry(fle, aStdFile);
beginning = end + 1;
end = strchr(beginning, ',');
}
}
static void
AppendToFaceList(nsCString& aFaceList,
nsAString& aFamilyName, FT2FontEntry* aFontEntry)
{
aFaceList.Append(NS_ConvertUTF16toUTF8(aFamilyName));
aFaceList.Append(',');
aFaceList.Append(NS_ConvertUTF16toUTF8(aFontEntry->Name()));
aFaceList.Append(',');
aFaceList.AppendInt(aFontEntry->mFTFontIndex);
aFaceList.Append(',');
aFaceList.Append(aFontEntry->IsItalic() ? '1' : '0');
aFaceList.Append(',');
aFaceList.AppendInt(aFontEntry->Weight());
aFaceList.Append(',');
aFaceList.AppendInt(aFontEntry->Stretch());
aFaceList.Append(',');
}
void
FT2FontEntry::CheckForBrokenFont(gfxFontFamily *aFamily)
{
// note if the family is in the "bad underline" blacklist
if (aFamily->IsBadUnderlineFamily()) {
mIsBadUnderlineFont = true;
}
// bug 721719 - set the IgnoreGSUB flag on entries for Roboto
// because of unwanted on-by-default "ae" ligature.
// (See also AppendFaceFromFontListEntry.)
if (aFamily->Name().EqualsLiteral("roboto")) {
mIgnoreGSUB = true;
}
// bug 706888 - set the IgnoreGSUB flag on the broken version of
// Droid Sans Arabic from certain phones, as identified by the
// font checksum in the 'head' table
else if (aFamily->Name().EqualsLiteral("droid sans arabic")) {
AutoFTFace face(this);
if (face) {
const TT_Header *head = static_cast<const TT_Header*>
(FT_Get_Sfnt_Table(face, ft_sfnt_head));
if (head && head->CheckSum_Adjust == 0xe445242) {
mIgnoreGSUB = true;
}
}
}
}
void
gfxFT2FontList::AppendFacesFromFontFile(const nsCString& aFileName,
FontNameCache *aCache,
StandardFile aStdFile,
FT2FontFamily::Visibility aVisibility)
{
nsCString cachedFaceList;
uint32_t filesize = 0, timestamp = 0;
if (aCache) {
aCache->GetInfoForFile(aFileName, cachedFaceList, ×tamp, &filesize);
}
struct stat s;
int statRetval = stat(aFileName.get(), &s);
if (!cachedFaceList.IsEmpty() && 0 == statRetval &&
s.st_mtime == timestamp && s.st_size == filesize)
{
LOG(("using cached font info for %s", aFileName.get()));
AppendFacesFromCachedFaceList(aFileName, cachedFaceList, aStdFile,
aVisibility);
return;
}
FT_Library ftLibrary = gfxAndroidPlatform::GetPlatform()->GetFTLibrary();
FT_Face dummy;
if (FT_Err_Ok == FT_New_Face(ftLibrary, aFileName.get(), -1, &dummy)) {
LOG(("reading font info via FreeType for %s", aFileName.get()));
nsCString newFaceList;
timestamp = s.st_mtime;
filesize = s.st_size;
for (FT_Long i = 0; i < dummy->num_faces; i++) {
FT_Face face;
if (FT_Err_Ok != FT_New_Face(ftLibrary, aFileName.get(), i, &face)) {
continue;
}
AddFaceToList(aFileName, i, aStdFile, aVisibility, face, newFaceList);
FT_Done_Face(face);
}
FT_Done_Face(dummy);
if (aCache && 0 == statRetval && !newFaceList.IsEmpty()) {
aCache->CacheFileInfo(aFileName, newFaceList, timestamp, filesize);
}
}
}
#define JAR_LAST_MODIFED_TIME "jar-last-modified-time"
void
gfxFT2FontList::FindFontsInOmnijar(FontNameCache *aCache)
{
bool jarChanged = false;
mozilla::scache::StartupCache* cache =
mozilla::scache::StartupCache::GetSingleton();
char *cachedModifiedTimeBuf;
uint32_t longSize;
int64_t jarModifiedTime;
if (cache &&
NS_SUCCEEDED(cache->GetBuffer(JAR_LAST_MODIFED_TIME,
&cachedModifiedTimeBuf,
&longSize)) &&
longSize == sizeof(int64_t))
{
nsCOMPtr<nsIFile> jarFile = Omnijar::GetPath(Omnijar::Type::GRE);
jarFile->GetLastModifiedTime(&jarModifiedTime);
if (jarModifiedTime > *(int64_t*)cachedModifiedTimeBuf) {
jarChanged = true;
}
}
static const char* sJarSearchPaths[] = {
"res/fonts/*.ttf$",
};
nsRefPtr<nsZipArchive> reader = Omnijar::GetReader(Omnijar::Type::GRE);
for (unsigned i = 0; i < ArrayLength(sJarSearchPaths); i++) {
nsZipFind* find;
if (NS_SUCCEEDED(reader->FindInit(sJarSearchPaths[i], &find))) {
const char* path;
uint16_t len;
while (NS_SUCCEEDED(find->FindNext(&path, &len))) {
nsCString entryName(path, len);
AppendFacesFromOmnijarEntry(reader, entryName, aCache,
jarChanged);
}
delete find;
}
}
if (cache) {
cache->PutBuffer(JAR_LAST_MODIFED_TIME, (char*)&jarModifiedTime,
sizeof(jarModifiedTime));
}
}