bool SimpleFontData::canRenderCombiningCharacterSequence(const UChar* characters, size_t length) const
{
if (!m_combiningCharacterSequenceSupport)
m_combiningCharacterSequenceSupport = adoptPtr(new HashMap<String, bool>);
WTF::HashMap<String, bool>::AddResult addResult = m_combiningCharacterSequenceSupport->add(String(characters, length), false);
if (!addResult.isNewEntry)
return addResult.iterator->value;
UErrorCode error = U_ZERO_ERROR;
Vector<UChar, 4> normalizedCharacters(length);
int32_t normalizedLength = unorm_normalize(characters, length, UNORM_NFC, UNORM_UNICODE_3_2, &normalizedCharacters[0], length, &error);
if (U_FAILURE(error))
return false;
int position = 0;
while (position < normalizedLength) {
UChar32 character;
int nextPosition = position;
U16_NEXT(normalizedCharacters, nextPosition, normalizedLength, character);
if (!u_hasBinaryProperty(character, UCHAR_DEFAULT_IGNORABLE_CODE_POINT)) {
FS_USHORT glyph = FS_map_char(m_platformData.font(), static_cast<FS_ULONG>(character));
if (!glyph)
return false;
}
position = nextPosition;
}
addResult.iterator->value = true;
return true;
}
bool SimpleFontData::containsCharacters(const UChar* characters, int length) const
{
int position = 0;
while (position < length) {
// FIXME: use shaper?
UChar32 character;
int nextPosition = position;
U16_NEXT(characters, nextPosition, length, character);
FS_USHORT glyph = FS_map_char(m_platformData.font(), static_cast<FS_ULONG>(character));
if (!glyph)
return false;
position = nextPosition;
}
return true;
}
bool GlyphPage::fill(unsigned offset, unsigned, UChar* buffer, unsigned bufferLength, const SimpleFontData* fontData)
{
bool haveGlyphs = false;
unsigned position = 0;
int i = 0;
while (position < bufferLength) {
UChar32 character;
unsigned nextPosition = position;
U16_NEXT(buffer, nextPosition, bufferLength, character);
FS_USHORT glyph = FS_map_char(fontData->platformData().font(), static_cast<FS_ULONG>(character));
if (!glyph)
setGlyphDataForIndex(offset + i, 0, 0);
else {
haveGlyphs = true;
setGlyphDataForIndex(offset + i, glyph, fontData);
}
i++;
position = nextPosition;
}
return haveGlyphs;
}
