void FontInstanceAdapter::mapCharsToGlyphs(const LEUnicode chars[], le_int32 offset, le_int32 count, le_bool reverse, const LECharMapper *mapper, LEGlyphID glyphs[]) const
{
le_int32 i, out = 0, dir = 1;
if (reverse) {
out = count - 1;
dir = -1;
}
for (i = offset; i < offset + count; i += 1, out += dir) {
LEUnicode16 high = chars[i];
LEUnicode32 code = high;
if (i < offset + count - 1 && high >= 0xD800 && high <= 0xDBFF) {
LEUnicode16 low = chars[i + 1];
if (low >= 0xDC00 && low <= 0xDFFF) {
code = (high - 0xD800) * 0x400 + low - 0xDC00 + 0x10000;
}
}
glyphs[out] = mapCharToGlyph(code, mapper);
if (code >= 0x10000) {
i += 1;
glyphs[out += dir] = 0xFFFF;
}
}
}
LEGlyphID LEFontInstance::mapCharToGlyph(LEUnicode32 ch, const LECharMapper *mapper) const
{
LEUnicode32 mappedChar = mapper->mapChar(ch);
if (mappedChar == 0xFFFE || mappedChar == 0xFFFF ||
mappedChar == 0x200C || mappedChar == 0x200D) {
return 0xFFFF;
}
return mapCharToGlyph(mappedChar);
}
LEGlyphID LEFontInstance::mapCharToGlyph(LEUnicode32 ch, const LECharMapper *mapper, le_bool filterZeroWidth) const
{
LEUnicode32 mappedChar = mapper->mapChar(ch);
if (mappedChar == 0xFFFE || mappedChar == 0xFFFF) {
return 0xFFFF;
}
if (filterZeroWidth && (mappedChar == 0x200C || mappedChar == 0x200D)) {
return canDisplay(mappedChar)? 0x0001 : 0xFFFF;
}
return mapCharToGlyph(mappedChar);
}
le_bool LEFontInstance::canDisplay(LEUnicode32 ch) const
{
return LE_GET_GLYPH(mapCharToGlyph(ch)) != 0;
}
LEGlyphID LEFontInstance::mapCharToGlyph(LEUnicode32 ch, const LECharMapper *mapper) const
{
return mapCharToGlyph(ch, mapper, TRUE);
}
