sl@0: /*
sl@0:  *******************************************************************************
sl@0:  *
sl@0:  *   Copyright (C) 1999-2004, International Business Machines
sl@0:  *   Corporation and others.  All Rights Reserved.
sl@0:  *
sl@0:  *******************************************************************************
sl@0:  *   file name:  LEFontInstance.cpp
sl@0:  *
sl@0:  *   created on: 02/06/2003
sl@0:  *   created by: Eric R. Mader
sl@0:  */
sl@0: 
sl@0: #include "LETypes.h"
sl@0: #include "LEScripts.h"
sl@0: #include "LEFontInstance.h"
sl@0: #include "LEGlyphStorage.h"
sl@0: 
sl@0: U_NAMESPACE_BEGIN
sl@0: 
sl@0: UOBJECT_DEFINE_RTTI_IMPLEMENTATION(LEFontInstance)
sl@0: 
sl@0: const LEFontInstance *LEFontInstance::getSubFont(const LEUnicode chars[], le_int32 *offset, le_int32 limit,
sl@0:                                                        le_int32 script, LEErrorCode &success) const
sl@0: {
sl@0:     if (LE_FAILURE(success)) {
sl@0:         return NULL;
sl@0:     }
sl@0: 
sl@0:     if (chars == NULL || *offset < 0 || limit < 0 || *offset >= limit || script < 0 || script >= scriptCodeCount) {
sl@0:         success = LE_ILLEGAL_ARGUMENT_ERROR;
sl@0:         return NULL;
sl@0:     }
sl@0: 
sl@0:     *offset = limit;
sl@0:     return this;
sl@0: }
sl@0: 
sl@0: void LEFontInstance::mapCharsToGlyphs(const LEUnicode chars[], le_int32 offset, le_int32 count,
sl@0:                                       le_bool reverse, const LECharMapper *mapper, LEGlyphStorage &glyphStorage) const
sl@0: {
sl@0:     le_int32 i, out = 0, dir = 1;
sl@0: 
sl@0:     if (reverse) {
sl@0:         out = count - 1;
sl@0:         dir = -1;
sl@0:     }
sl@0: 
sl@0:     for (i = offset; i < offset + count; i += 1, out += dir) {
sl@0:         LEUnicode16 high = chars[i];
sl@0:         LEUnicode32 code = high;
sl@0: 
sl@0:         if (i < offset + count - 1 && high >= 0xD800 && high <= 0xDBFF) {
sl@0:             LEUnicode16 low = chars[i + 1];
sl@0: 
sl@0:             if (low >= 0xDC00 && low <= 0xDFFF) {
sl@0:                 code = (high - 0xD800) * 0x400 + low - 0xDC00 + 0x10000;
sl@0:             }
sl@0:         }
sl@0: 
sl@0:         glyphStorage[out] = mapCharToGlyph(code, mapper);
sl@0: 
sl@0:         if (code >= 0x10000) {
sl@0:             i += 1;
sl@0:             glyphStorage[out += dir] = 0xFFFF;
sl@0:         }
sl@0:     }
sl@0: }
sl@0: 
sl@0: LEGlyphID LEFontInstance::mapCharToGlyph(LEUnicode32 ch, const LECharMapper *mapper) const
sl@0: {
sl@0:     LEUnicode32 mappedChar = mapper->mapChar(ch);
sl@0: 
sl@0:     if (mappedChar == 0xFFFE || mappedChar == 0xFFFF) {
sl@0:         return 0xFFFF;
sl@0:     }
sl@0: 
sl@0:     if (mappedChar == 0x200C/* || mappedChar == 0x200D*/) { //1922 mlyl --> commented 200D for chillu -->
sl@0:         return 1;
sl@0:     }
sl@0: 
sl@0:     return mapCharToGlyph(mappedChar);
sl@0: }
sl@0: U_NAMESPACE_END
sl@0: