1 /*

     2  *******************************************************************************

     3  *

     4  *   Copyright (C) 1999-2004, International Business Machines

     5  *   Corporation and others.  All Rights Reserved.

     6  *

     7  *******************************************************************************

     8  *   file name:  LEFontInstance.cpp

     9  *

    10  *   created on: 02/06/2003

    11  *   created by: Eric R. Mader

    12  */

    13 

    14 #include "LETypes.h"

    15 #include "LEScripts.h"

    16 #include "LEFontInstance.h"

    17 #include "LEGlyphStorage.h"

    18 

    19 U_NAMESPACE_BEGIN

    20 

    21 UOBJECT_DEFINE_RTTI_IMPLEMENTATION(LEFontInstance)

    22 

    23 const LEFontInstance *LEFontInstance::getSubFont(const LEUnicode chars[], le_int32 *offset, le_int32 limit,

    24                                                        le_int32 script, LEErrorCode &success) const

    25 {

    26     if (LE_FAILURE(success)) {

    27         return NULL;

    28     }

    29 

    30     if (chars == NULL || *offset < 0 || limit < 0 || *offset >= limit || script < 0 || script >= scriptCodeCount) {

    31         success = LE_ILLEGAL_ARGUMENT_ERROR;

    32         return NULL;

    33     }

    34 

    35     *offset = limit;

    36     return this;

    37 }

    38 

    39 void LEFontInstance::mapCharsToGlyphs(const LEUnicode chars[], le_int32 offset, le_int32 count,

    40                                       le_bool reverse, const LECharMapper *mapper, LEGlyphStorage &glyphStorage) const

    41 {

    42     le_int32 i, out = 0, dir = 1;

    43 

    44     if (reverse) {

    45         out = count - 1;

    46         dir = -1;

    47     }

    48 

    49     for (i = offset; i < offset + count; i += 1, out += dir) {

    50         LEUnicode16 high = chars[i];

    51         LEUnicode32 code = high;

    52 

    53         if (i < offset + count - 1 && high >= 0xD800 && high <= 0xDBFF) {

    54             LEUnicode16 low = chars[i + 1];

    55 

    56             if (low >= 0xDC00 && low <= 0xDFFF) {

    57                 code = (high - 0xD800) * 0x400 + low - 0xDC00 + 0x10000;

    58             }

    59         }

    60 

    61         glyphStorage[out] = mapCharToGlyph(code, mapper);

    62 

    63         if (code >= 0x10000) {

    64             i += 1;

    65             glyphStorage[out += dir] = 0xFFFF;

    66         }

    67     }

    68 }

    69 

    70 LEGlyphID LEFontInstance::mapCharToGlyph(LEUnicode32 ch, const LECharMapper *mapper) const

    71 {

    72     LEUnicode32 mappedChar = mapper->mapChar(ch);

    73 

    74     if (mappedChar == 0xFFFE || mappedChar == 0xFFFF) {

    75         return 0xFFFF;

    76     }

    77 

    78     if (mappedChar == 0x200C/* || mappedChar == 0x200D*/) { //1922 mlyl --> commented 200D for chillu -->

    79         return 1;

    80     }

    81 

    82     return mapCharToGlyph(mappedChar);

    83 }

    84 U_NAMESPACE_END

    85