| /* |
| ******************************************************************************* |
| * |
| * Copyright (C) 1999-2003, International Business Machines |
| * Corporation and others. All Rights Reserved. |
| * |
| ******************************************************************************* |
| * file name: LEFontInstance.cpp |
| * |
| * created on: 02/06/2003 |
| * created by: Eric R. Mader |
| */ |
| |
| #include "LETypes.h" |
| #include "LEScripts.h" |
| #include "LEFontInstance.h" |
| |
| U_NAMESPACE_BEGIN |
| |
| const char LEFontInstance::fgClassID=0; |
| |
| const LEFontInstance *LEFontInstance::getSubFont(const LEUnicode chars[], le_int32 *offset, le_int32 limit, |
| le_int32 script, LEErrorCode &success) const |
| { |
| if (LE_FAILURE(success)) { |
| return NULL; |
| } |
| |
| if (chars == NULL || *offset < 0 || limit < 0 || *offset >= limit || script < 0 || script >= scriptCodeCount) { |
| success = LE_ILLEGAL_ARGUMENT_ERROR; |
| return NULL; |
| } |
| |
| *offset = limit; |
| return this; |
| } |
| |
| void LEFontInstance::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) { |
| return 0xFFFF; |
| } |
| |
| if (mappedChar == 0x200C || mappedChar == 0x200D) { |
| return 1; |
| } |
| |
| return mapCharToGlyph(mappedChar); |
| } |
| U_NAMESPACE_END |
| |