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freetype/src/psaux/t1cmap.c
John Tytgat 03e8b2f763 Fix custom cmap for empty Type 1 font (Savannah bug #27294). 
* include/freetype/internal/t1types.h (T1_EncodingRecRec_): Update
comment to reflect revised code_last meaning.
* src/type1/t1load.c (T1_Open_Face), src/type42/t42objs.c
(T42_Open_Face): Assign max_char as highest character code + 1 and
use this for T1_EncodingRecRec_::code_last.
* src/psaux/t1cmap.c (t1_cmap_custom_init): Follow revised
T1_EncodingRecRec_::code_last meaning.
2009-09-01 08:10:24 +02:00

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/***************************************************************************/
/* */
/* t1cmap.c */
/* */
/* Type 1 character map support (body). */
/* */
/* Copyright 2002, 2003, 2006, 2007 by */
/* David Turner, Robert Wilhelm, and Werner Lemberg. */
/* */
/* This file is part of the FreeType project, and may only be used, */
/* modified, and distributed under the terms of the FreeType project */
/* license, LICENSE.TXT. By continuing to use, modify, or distribute */
/* this file you indicate that you have read the license and */
/* understand and accept it fully. */
/* */
/***************************************************************************/
#include "t1cmap.h"
#include FT_INTERNAL_DEBUG_H
#include "psauxerr.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 );
FT_Service_PsCMaps psnames = (FT_Service_PsCMaps)face->psnames;
cmap->num_glyphs = face->type1.num_glyphs;
cmap->glyph_names = (const char* const*)face->type1.glyph_names;
cmap->sid_to_string = psnames->adobe_std_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_to_string = 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, n;
const char* glyph_name;
/* convert character code to Adobe SID string */
code = cmap->code_to_sid[char_code];
glyph_name = cmap->sid_to_string( 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] &&
ft_strcmp( gname, glyph_name ) == 0 )
{
result = n;
break;
}
}
}
return result;
}
FT_CALLBACK_DEF( FT_UInt32 )
t1_cmap_std_char_next( T1_CMapStd cmap,
FT_UInt32 *pchar_code )
{
FT_UInt result = 0;
FT_UInt32 char_code = *pchar_code + 1;
while ( char_code < 256 )
{
result = t1_cmap_std_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_DEF const FT_CMap_ClassRec
t1_cmap_standard_class_rec =
{
sizeof ( T1_CMapStdRec ),
(FT_CMap_InitFunc) t1_cmap_standard_init,
(FT_CMap_DoneFunc) t1_cmap_std_done,
(FT_CMap_CharIndexFunc)t1_cmap_std_char_index,
(FT_CMap_CharNextFunc) t1_cmap_std_char_next,
NULL, NULL, NULL, NULL, NULL
};
FT_CALLBACK_DEF( FT_Error )
t1_cmap_expert_init( T1_CMapStd cmap )
{
t1_cmap_std_init( cmap, 1 );
return 0;
}
FT_CALLBACK_TABLE_DEF const FT_CMap_ClassRec
t1_cmap_expert_class_rec =
{
sizeof ( T1_CMapStdRec ),
(FT_CMap_InitFunc) t1_cmap_expert_init,
(FT_CMap_DoneFunc) t1_cmap_std_done,
(FT_CMap_CharIndexFunc)t1_cmap_std_char_index,
(FT_CMap_CharNextFunc) t1_cmap_std_char_next,
NULL, NULL, NULL, NULL, NULL
};
/*************************************************************************/
/*************************************************************************/
/***** *****/
/***** 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 );
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;
if ( ( char_code >= cmap->first ) &&
( char_code < ( cmap->first + cmap->count ) ) )
result = cmap->indices[char_code];
return result;
}
FT_CALLBACK_DEF( FT_UInt32 )
t1_cmap_custom_char_next( T1_CMapCustom cmap,
FT_UInt32 *pchar_code )
{
FT_UInt result = 0;
FT_UInt32 char_code = *pchar_code;
++char_code;
if ( char_code < cmap->first )
char_code = cmap->first;
for ( ; char_code < ( cmap->first + cmap->count ); char_code++ )
{
result = cmap->indices[char_code];
if ( result != 0 )
goto Exit;
}
char_code = 0;
Exit:
*pchar_code = char_code;
return result;
}
FT_CALLBACK_TABLE_DEF const FT_CMap_ClassRec
t1_cmap_custom_class_rec =
{
sizeof ( T1_CMapCustomRec ),
(FT_CMap_InitFunc) t1_cmap_custom_init,
(FT_CMap_DoneFunc) t1_cmap_custom_done,
(FT_CMap_CharIndexFunc)t1_cmap_custom_char_index,
(FT_CMap_CharNextFunc) t1_cmap_custom_char_next,
NULL, NULL, NULL, NULL, NULL
};
/*************************************************************************/
/*************************************************************************/
/***** *****/
/***** TYPE1 SYNTHETIC UNICODE ENCODING CMAP *****/
/***** *****/
/*************************************************************************/
/*************************************************************************/
FT_CALLBACK_DEF( const char * )
t1_get_glyph_name( T1_Face face,
FT_UInt idx )
{
return face->type1.glyph_names[idx];
}
FT_CALLBACK_DEF( FT_Error )
t1_cmap_unicode_init( PS_Unicodes unicodes )
{
T1_Face face = (T1_Face)FT_CMAP_FACE( unicodes );
FT_Memory memory = FT_FACE_MEMORY( face );
FT_Service_PsCMaps psnames = (FT_Service_PsCMaps)face->psnames;
return psnames->unicodes_init( memory,
unicodes,
face->type1.num_glyphs,
(PS_GetGlyphNameFunc)&t1_get_glyph_name,
(PS_FreeGlyphNameFunc)NULL,
(FT_Pointer)face );
}
FT_CALLBACK_DEF( void )
t1_cmap_unicode_done( PS_Unicodes unicodes )
{
FT_Face face = FT_CMAP_FACE( unicodes );
FT_Memory memory = FT_FACE_MEMORY( face );
FT_FREE( unicodes->maps );
unicodes->num_maps = 0;
}
FT_CALLBACK_DEF( FT_UInt )
t1_cmap_unicode_char_index( PS_Unicodes unicodes,
FT_UInt32 char_code )
{
T1_Face face = (T1_Face)FT_CMAP_FACE( unicodes );
FT_Service_PsCMaps psnames = (FT_Service_PsCMaps)face->psnames;
return psnames->unicodes_char_index( unicodes, char_code );
}
FT_CALLBACK_DEF( FT_UInt32 )
t1_cmap_unicode_char_next( PS_Unicodes unicodes,
FT_UInt32 *pchar_code )
{
T1_Face face = (T1_Face)FT_CMAP_FACE( unicodes );
FT_Service_PsCMaps psnames = (FT_Service_PsCMaps)face->psnames;
return psnames->unicodes_char_next( unicodes, pchar_code );
}
FT_CALLBACK_TABLE_DEF const FT_CMap_ClassRec
t1_cmap_unicode_class_rec =
{
sizeof ( PS_UnicodesRec ),
(FT_CMap_InitFunc) t1_cmap_unicode_init,
(FT_CMap_DoneFunc) t1_cmap_unicode_done,
(FT_CMap_CharIndexFunc)t1_cmap_unicode_char_index,
(FT_CMap_CharNextFunc) t1_cmap_unicode_char_next,
NULL, NULL, NULL, NULL, NULL
};
/* END */
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