bool GetU16FullName(mozilla::u16string& aU16FullName)
{
const TableDirEntry* dirEntry =
GetDirEntry(TRUETYPE_TAG('n', 'a', 'm', 'e'));
if (!dirEntry) {
gfxWarning() << "Name table entry not found.";
return false;
}
UniquePtr<SFNTNameTable> nameTable =
SFNTNameTable::Create((mFontData + dirEntry->offset), dirEntry->length);
if (!nameTable) {
return false;
}
return nameTable->GetU16FullName(aU16FullName);
}
/* static */
UniquePtr<SFNTData>
SFNTData::Create(const uint8_t *aFontData, uint32_t aDataLength)
{
MOZ_ASSERT(aFontData);
// Check to see if this is a font collection.
if (aDataLength < sizeof(TTCHeader)) {
gfxWarning() << "Font data too short.";
return nullptr;
}
const TTCHeader *ttcHeader = reinterpret_cast<const TTCHeader*>(aFontData);
if (ttcHeader->ttcTag == TRUETYPE_TAG('t', 't', 'c', 'f')) {
uint32_t numFonts = ttcHeader->numFonts;
if (aDataLength < sizeof(TTCHeader) + (numFonts * sizeof(BigEndianUint32))) {
gfxWarning() << "Font data too short to contain full TTC Header.";
return nullptr;
}
UniquePtr<SFNTData> sfntData(new SFNTData);
const BigEndianUint32* offset =
reinterpret_cast<const BigEndianUint32*>(aFontData + sizeof(TTCHeader));
const BigEndianUint32* endOfOffsets = offset + numFonts;
while (offset != endOfOffsets) {
if (!sfntData->AddFont(aFontData, aDataLength, *offset)) {
return nullptr;
}
++offset;
}
return Move(sfntData);
}
UniquePtr<SFNTData> sfntData(new SFNTData);
if (!sfntData->AddFont(aFontData, aDataLength, 0)) {
return nullptr;
}
return Move(sfntData);
}
nsresult
GDIFontEntry::ReadCMAP()
{
// skip non-SFNT fonts completely
if (mFontType != GFX_FONT_TYPE_PS_OPENTYPE &&
mFontType != GFX_FONT_TYPE_TT_OPENTYPE &&
mFontType != GFX_FONT_TYPE_TRUETYPE)
{
return NS_ERROR_FAILURE;
}
// attempt this once, if errors occur leave a blank cmap
if (mCmapInitialized)
return NS_OK;
mCmapInitialized = PR_TRUE;
const PRUint32 kCmapTag = TRUETYPE_TAG('c','m','a','p');
AutoFallibleTArray<PRUint8,16384> buffer;
if (GetFontTable(kCmapTag, buffer) != NS_OK)
return NS_ERROR_FAILURE;
PRUint8 *cmap = buffer.Elements();
PRPackedBool unicodeFont = PR_FALSE, symbolFont = PR_FALSE;
nsresult rv = gfxFontUtils::ReadCMAP(cmap, buffer.Length(),
mCharacterMap, mUVSOffset,
unicodeFont, symbolFont);
mUnicodeFont = unicodeFont;
mSymbolFont = symbolFont;
mHasCmapTable = NS_SUCCEEDED(rv);
#ifdef PR_LOGGING
LOG_FONTLIST(("(fontlist-cmap) name: %s, size: %d\n",
NS_ConvertUTF16toUTF8(mName).get(), mCharacterMap.GetSize()));
#endif
return rv;
}
void nsFont::AddFontFeaturesToStyle(gfxFontStyle *aStyle) const
{
// add in font-variant features
gfxFontFeature setting;
// -- kerning
setting.mTag = TRUETYPE_TAG('k','e','r','n');
switch (kerning) {
case NS_FONT_KERNING_NONE:
setting.mValue = 0;
aStyle->featureSettings.AppendElement(setting);
break;
case NS_FONT_KERNING_NORMAL:
setting.mValue = 1;
aStyle->featureSettings.AppendElement(setting);
break;
default:
// auto case implies use user agent default
break;
}
// -- alternates
if (variantAlternates & NS_FONT_VARIANT_ALTERNATES_HISTORICAL) {
setting.mValue = 1;
setting.mTag = TRUETYPE_TAG('h','i','s','t');
aStyle->featureSettings.AppendElement(setting);
}
// -- copy font-specific alternate info into style
// (this will be resolved after font-matching occurs)
aStyle->alternateValues.AppendElements(alternateValues);
aStyle->featureValueLookup = featureValueLookup;
// -- caps
setting.mValue = 1;
switch (variantCaps) {
case NS_FONT_VARIANT_CAPS_ALLSMALL:
setting.mTag = TRUETYPE_TAG('c','2','s','c');
aStyle->featureSettings.AppendElement(setting);
// fall through to the small-caps case
case NS_FONT_VARIANT_CAPS_SMALLCAPS:
setting.mTag = TRUETYPE_TAG('s','m','c','p');
aStyle->featureSettings.AppendElement(setting);
break;
case NS_FONT_VARIANT_CAPS_ALLPETITE:
setting.mTag = TRUETYPE_TAG('c','2','p','c');
aStyle->featureSettings.AppendElement(setting);
// fall through to the petite-caps case
case NS_FONT_VARIANT_CAPS_PETITECAPS:
setting.mTag = TRUETYPE_TAG('p','c','a','p');
aStyle->featureSettings.AppendElement(setting);
break;
case NS_FONT_VARIANT_CAPS_TITLING:
setting.mTag = TRUETYPE_TAG('t','i','t','l');
aStyle->featureSettings.AppendElement(setting);
break;
case NS_FONT_VARIANT_CAPS_UNICASE:
setting.mTag = TRUETYPE_TAG('u','n','i','c');
aStyle->featureSettings.AppendElement(setting);
break;
default:
break;
}
// -- east-asian
if (variantEastAsian) {
AddFontFeaturesBitmask(variantEastAsian,
NS_FONT_VARIANT_EAST_ASIAN_JIS78,
NS_FONT_VARIANT_EAST_ASIAN_RUBY,
eastAsianDefaults, aStyle->featureSettings);
}
// -- ligatures
if (variantLigatures) {
AddFontFeaturesBitmask(variantLigatures,
NS_FONT_VARIANT_LIGATURES_COMMON,
NS_FONT_VARIANT_LIGATURES_NO_CONTEXTUAL,
ligDefaults, aStyle->featureSettings);
// special case common ligs, which also enable/disable clig
if (variantLigatures & NS_FONT_VARIANT_LIGATURES_COMMON) {
setting.mTag = TRUETYPE_TAG('c','l','i','g');
setting.mValue = 1;
aStyle->featureSettings.AppendElement(setting);
} else if (variantLigatures & NS_FONT_VARIANT_LIGATURES_NO_COMMON) {
setting.mTag = TRUETYPE_TAG('c','l','i','g');
setting.mValue = 0;
aStyle->featureSettings.AppendElement(setting);
}
}
// -- numeric
if (variantNumeric) {
AddFontFeaturesBitmask(variantNumeric,
NS_FONT_VARIANT_NUMERIC_LINING,
NS_FONT_VARIANT_NUMERIC_ORDINAL,
numericDefaults, aStyle->featureSettings);
}
// -- position
setting.mTag = 0;
setting.mValue = 1;
switch (variantPosition) {
case NS_FONT_VARIANT_POSITION_SUPER:
setting.mTag = TRUETYPE_TAG('s','u','p','s');
aStyle->featureSettings.AppendElement(setting);
break;
case NS_FONT_VARIANT_POSITION_SUB:
setting.mTag = TRUETYPE_TAG('s','u','b','s');
aStyle->featureSettings.AppendElement(setting);
break;
default:
break;
}
// add in features from font-feature-settings
aStyle->featureSettings.AppendElements(fontFeatureSettings);
// enable grayscale antialiasing for text
if (smoothing == NS_FONT_SMOOTHING_GRAYSCALE) {
aStyle->useGrayscaleAntialiasing = true;
}
}
return false;
++p; // may advance past p_end
}
return true;
}
// mapping from bitflag to font feature tag/value pair
//
// these need to be kept in sync with the constants listed
// in gfxFontConstants.h (e.g. NS_FONT_VARIANT_EAST_ASIAN_JIS78)
// NS_FONT_VARIANT_EAST_ASIAN_xxx values
const gfxFontFeature eastAsianDefaults[] = {
{ TRUETYPE_TAG('j','p','7','8'), 1 },
{ TRUETYPE_TAG('j','p','8','3'), 1 },
{ TRUETYPE_TAG('j','p','9','0'), 1 },
{ TRUETYPE_TAG('j','p','0','4'), 1 },
{ TRUETYPE_TAG('s','m','p','l'), 1 },
{ TRUETYPE_TAG('t','r','a','d'), 1 },
{ TRUETYPE_TAG('f','w','i','d'), 1 },
{ TRUETYPE_TAG('p','w','i','d'), 1 },
{ TRUETYPE_TAG('r','u','b','y'), 1 }
};
static_assert(NS_ARRAY_LENGTH(eastAsianDefaults) ==
eFeatureEastAsian_numFeatures,
"eFeatureEastAsian_numFeatures should be correct");
// NS_FONT_VARIANT_LIGATURES_xxx values
