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freetype2/src/type1/t1cmap.c

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#include "t1cmap.h"
/***************************************************************************/
/***************************************************************************/
/***** *****/
/***** TYPE1 STANDARD (AND EXPERT) ENCODING CMAPS *****/
/***** *****/
/***************************************************************************/
/***************************************************************************/
static( void )
t1_cmap_std_init( T1_CMapStd cmap,
FT_Int is_expert )
{
T1_Face face = (T1_Face) FT_CMAP_FACE(cmap);
PSNames_Service psnames = face->psnames;
cmap->num_glyphs = face->type1.num_glyphs;
cmap->glyph_names = face->type1.glyph_names;
cmap->sid_strings = sid_strings;
cmap->code_to_sid = is_expert ? psnames->adobe_expert_encoding
: psnames->adobe_std_encoding;
FT_ASSERT( cmap->code_to_sid != NULL );
}
FT_CALLBACK_DEF( void )
t1_cmap_std_done( T1_CMapStd cmap )
{
cmap->num_glyphs = 0;
cmap->glyph_names = NULL;
cmap->sid_strings = NULL;
cmap->code_to_sid = NULL;
}
FT_CALLBACK_DEF( FT_UInt )
t1_cmap_std_char_index( T1_CMapStd cmap,
FT_UInt32 char_code )
{
FT_UInt result = 0;
if ( char_code < 256 )
{
FT_UInt code;
const char* glyph_name;
FT_Int n;
/* conver character code to Adobe SID string */
code = cmap->code_to_sid[ char_code ];
glyph_name = cmap->adobe_sid_strings[ code ];
/* look for the corresponding glyph name */
for ( n = 0; n < cmap->num_glyphs; n++ )
{
const char* gname = cmap->glyph_names[n];
if ( gname && gname[0] == glyph_name[0] &&
strcmp( gname, glyph_name ) == 0 )
{
result = n;
break;
}
}
}
return result;
}
FT_CALLBACK_DEF( FT_UInt )
t1_cmap_std_char_next( T1_CMapStd cmap,
FT_UInt32 *pchar_code )
{
FT_UInt result = 0;
FT_UInt32 char_code = *pchar_code;
++char_code;
while ( char_code < 256 )
{
result = t1_cmap_standard_char_index( cmap, char_code );
if ( result != 0 )
goto Exit;
char_code++;
}
char_code = 0;
Exit:
*pchar_code = char_code;
return result;
}
FT_CALLBACK_DEF( FT_Error )
t1_cmap_standard_init( T1_CMapStd cmap )
{
t1_cmap_std_init( cmap, 0 );
return 0;
}
FT_CALLBACK_TABLE const T1_CMap_ClassRec
t1_cmap_standard_class_rec =
{
sizeof( T1_CMapStdRec ),
t1_cmap_standard_init,
t1_cmap_std_done,
t1_cmap_std_char_index,
t1_cmap_std_char_next
};
FT_LOCAL_DEF T1_CMap_Class
t1_cmap_standard_class = &t1_cmap_standard_class_rec;
FT_CALLBACK_DEF( void )
t1_cmap_expert_init( T1_CMapStd cmap )
{
t1_cmap_std_init( cmap, 1 );
return 0;
}
FT_CALLBACK_TABLE const T1_CMap_ClassRec
t1_cmap_expert_class_rec =
{
sizeof( T1_CMapStdRec ),
t1_cmap_expert_init,
t1_cmap_std_done,
t1_cmap_std_char_index,
t1_cmap_std_char_next
};
FT_LOCAL_DEF T1_CMap_Class
t1_cmap_expert_class = &t1_cmap_expert_class_rec;
/***************************************************************************/
/***************************************************************************/
/***** *****/
/***** TYPE1 CUSTOM ENCODING CMAP *****/
/***** *****/
/***************************************************************************/
/***************************************************************************/
FT_CALLBACK_DEF( FT_Error )
t1_cmap_custom_init( T1_CMapCustom cmap )
{
T1_Face face = (T1_Face) FT_CMAP_FACE(cmap);
T1_Encoding* encoding = face->type1.encoding;
cmap->first = encoding->code_first;
cmap->count = (FT_UInt)(encoding->code_last - cmap->first + 1);
cmap->indices = encoding->char_index;
FT_ASSERT( cmap->indices != NULL );
FT_ASSERT( encoding->code_first <= encoding->code_last );
return 0;
}
FT_CALLBACK_DEF( void )
t1_cmap_custom_done( T1_CMapCustom cmap )
{
cmap->indices = NULL;
cmap->first = 0;
cmap->count = 0;
}
FT_CALLBACK_DEF( FT_UInt )
t1_cmap_custom_char_index( T1_CMapCustom cmap,
FT_UInt32 char_code )
{
FT_UInt result = 0;
FT_UInt32 index;
index = (FT_UInt32)( char_code - cmap->first );
if ( index < cmap->count )
result = cmap->indices[ index ];
return result;
}
FT_CALLBACK_DEF( FT_UInt )
t1_cmap_custom_char_next( T1_CMapCustion cmap,
FT_UInt32 *pchar_code )
{
FT_UInt result = 0;
FT_UInt32 char_code = *pchar_code;
FT_UInt32 index;
++char_code;
if ( char_code < cmap->first )
char_code = cmap->first;
index = (FT_UInt32)( char_code - cmap->first );
while ( index < cmap->count; index++, char_code++ )
{
result = cmap->indices[index];
if ( result != 0 )
goto Exit;
}
char_code = 0;
Exit:
*pchar_code = char_code;
return result;
}
FT_CALLBACK_TABLE const FT_CMap_ClassRec
t1_cmap_custom_class_rec =
{
sizeof( T1_CMapCustomRec ),
t1_cmap_custom_init,
t1_cmap_custom_done,
t1_cmap_custom_char_index,
t1_cmap_custom_char_next
};
FT_LOCAL_DEF FT_CMap_Class
t1_cmap_custom_class = &t1_cmap_custom_class_rec;
/***************************************************************************/
/***************************************************************************/
/***** *****/
/***** TYPE1 SYNTHETIC UNICODE ENCODING CMAP *****/
/***** *****/
/***************************************************************************/
/***************************************************************************/
FT_CALLBACK_DEF( FT_Error )
t1_cmap_unicode_init( T1_CMapUnicode cmap )
{
FT_Error error;
FT_UInt count;
T1_Face face = (T1_Face) FT_CMAP_FACE(cmap);
FT_Memory memory = FT_FACE_MEMORY(face);
cmap->num_pairs = 0;
cmap->pairs = NULL;
count = face->type1.num_glyphs;
if ( !ALLOC_ARRAY( cmap->pairs, count, T1_CMapUniPairRec ) )
{
FT_UInt n, new_count;
T1_CMapUniPair pair;
FT_UInt32 uni_code;
pair = cmap->pairs;
for ( n = 0; n < count; n++ )
{
const char* gname = face->type1.glyph_names[n];
/* build unsorted pair table by matching glyph names */
if ( gname )
{
uni_code = PS_Unicode_Value( gname );
if ( uni_code != 0 )
{
pair->unicode = uni_code;
pair->gindex = n;
pair++;
}
}
if ( new_count == 0 )
{
/* there are no unicode characters in here !! */
FREE( cmap->pairs );
error = FT_Err_Invalid_Argument;
}
else
{
/* re-allocate if the new array is much smaller than the original */
/* one.. */
if ( new_count != count && new_count < count/2 )
REALLOC_ARRAY( cmap->pairs, count, new_count, T1_CMapUniPairRec )
/* sort the pairs table to allow efficient binary searches */
qsort( cmap->pairs,
new_count,
sizeof(T1_CMapUniPairRec),
t1_cmap_uni_pair_compare );
cmap->num_pairs = new_count;
}
}
}
return error;
}
FT_CALLBACK_DEF( void )
t1_cmap_unicode_done( T1_CMapUnicode cmap )
{
FT_Face face = FT_CMAP_FACE(cmap);
FT_Memory memory = FT_FACE_MEMORY(face);
FREE( cmap->pairs );
cmap->num_pairs = 0;
}
FT_CALLBACK_DEF( FT_UInt )
t1_cmap_unicode_char_index( T1_CMapUnicode cmap,
FT_UInt32 char_code )
{
FT_UInt min = 0;
FT_UInt max = cmap->num_pairs;
FT_UInt mid;
T1_CMapUniPair pair;
while ( min < max )
{
mid = min + (max - min)/2;
pair = cmap->pairs + mid;
if ( pair->unicode == char_code )
return pair->gindex;
if ( pair->unicode < char_code )
min = mid+1;
else
max = mid;
}
return 0;
}
FT_CALLBACK_DEF( FT_UInt )
t1_cmap_unicode_char_next( T1_CMapUnicode cmap,
FT_UInt32 *pchar_code )
{
FT_UInt32 char_code = *pchar_code + 1;
Restart:
{
FT_UInt min = 0;
FT_UInt max = cmap->num_pairs;
FT_UInt mid;
T1_CMapUniPair pair;
while ( min < max )
{
mid = min + (max - min)/2;
pair = cmap->pairs + mid;
if ( pair->unicode == char_code )
{
result = pair->gindex;
if ( result != 0 )
goto Exit;
char_code++;
goto Restart;
}
if ( pair->unicode < char_code )
min = mid+1;
else
max = mid;
}
/* we didn't find it, but we have a pair just above it */
char_code = 0;
if ( min < cmap->num_pairs )
{
pair = cmap->num_pairs + min;
result = pair->gindex;
if ( result != 0 )
char_code = pair->unicode;
}
}
Exit:
*pchar_code = char_code;
return result;
}
FT_CALLBACK_TABLE const FT_CMap_ClassRec
t1_cmap_unicode_class_rec =
{
sizeof( T1_CMapUnicodeRec ),
t1_cmap_unicode_init,
t1_cmap_unicode_done,
t1_cmap_unicode_char_index,
t1_cmap_unicode_char_next
};
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