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[tfm] Define tfm_cmap_class functions. 

* Define structure TFM_CMapRec for TeX tfm font format.
* src/tfm/tfmdrivr.c: Define tfm_cmap_init, tfm_cmap_done,
tfm_cmap_char_index, tfm_cmap_char_next.
This commit is contained in:
Parth Wazurkar 2018-06-29 17:19:52 +05:30
parent 90624af017
commit 39375424d9
1 changed files with 46 additions and 5 deletions
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51
src/tfm/tfmdrivr.c
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@ -42,7 +42,8 @@
typedef struct TFM_CMapRec_
{
FT_CMapRec cmap;
/* TO-DO */
FT_UInt32 begin_char; /* Beginning Character */
FT_UInt32 end_char ; /* End Character */
} TFM_CMapRec, *TFM_CMap;
@ -50,14 +51,24 @@
tfm_cmap_init( FT_CMap tfmcmap,
FT_Pointer init_data )
{
/* TO-DO */
TFM_CMap cmap = (TFM_CMap)tfmcmap;
TFM_Face face = (TFM_Face)FT_CMAP_FACE( cmap );
FT_UNUSED( init_data );
cmap->begin_char = ;
cmap->end_char = ;
return FT_Err_Ok;
}
FT_CALLBACK_DEF( void )
tfm_cmap_done( FT_CMap tfmcmap )
{
/* TO-DO */
TFM_CMap cmap = (TFM_CMap)tfmcmap;
cmap->begin_char = ;
cmap->end_char = ;
}
@ -65,14 +76,44 @@
tfm_cmap_char_index( FT_CMap tfmcmap,
FT_UInt32 char_code )
{
/* TO-DO */
FT_UInt gindex = 0;
TFM_CMap cmap = (TFM_CMap)tfmcmap;
char_code -= cmap->begin_char;
if ( char_code < cmap->end_char - cmap->begin_char + 1 )
gindex = (FT_UInt)( char_code );
return gindex;
}
FT_CALLBACK_DEF( FT_UInt )
tfm_cmap_char_next( FT_CMap tfmcmap,
FT_UInt32 *achar_code )
{
/* TO-DO */
TFM_CMap cmap = (TFM_CMap)tfmcmap;
FT_UInt gindex = 0;
FT_UInt32 result = 0;
FT_UInt32 char_code = *achar_code + 1;
if ( char_code <= cmap->begin_char )
{
result = cmap->bc;
gindex = 1;
}
else
{
char_code -= cmap->begin_char;
if ( char_code < cmap->end_char - cmap->begin_char + 1 )
{
result = char_code;
gindex = (FT_UInt)( char_code );
}
}
*achar_code = result;
return gindex;
}