ref: 1f6de2fe3823cc6e749b8254187e81e20589bae8
dir: /libfreetype/sfdriver.c/
/***************************************************************************/
/* */
/* sfdriver.c */
/* */
/* High-level SFNT driver interface (body). */
/* */
/* Copyright 1996-2001, 2002 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 <ft2build.h>
#include FT_INTERNAL_SFNT_H
#include FT_INTERNAL_OBJECTS_H
#include "sfdriver.h"
#include "ttload.h"
#include "ttcmap.h"
#include "sfobjs.h"
#ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS
#include "ttsbit.h"
#endif
#ifdef TT_CONFIG_OPTION_POSTSCRIPT_NAMES
#include "ttpost.h"
#endif
static void*
get_sfnt_table( TT_Face face,
FT_Sfnt_Tag tag )
{
void* table;
switch ( tag )
{
case ft_sfnt_head:
table = &face->header;
break;
case ft_sfnt_hhea:
table = &face->horizontal;
break;
case ft_sfnt_vhea:
table = face->vertical_info ? &face->vertical : 0;
break;
case ft_sfnt_os2:
table = face->os2.version == 0xFFFFU ? 0 : &face->os2;
break;
case ft_sfnt_post:
table = &face->postscript;
break;
case ft_sfnt_maxp:
table = &face->max_profile;
break;
case ft_sfnt_pclt:
table = face->pclt.Version ? &face->pclt : 0;
break;
default:
table = 0;
}
return table;
}
#ifdef TT_CONFIG_OPTION_POSTSCRIPT_NAMES
static FT_Error
get_sfnt_glyph_name( TT_Face face,
FT_UInt glyph_index,
FT_Pointer buffer,
FT_UInt buffer_max )
{
FT_String* gname;
FT_Error error;
error = tt_face_get_ps_name( face, glyph_index, &gname );
if ( !error && buffer_max > 0 )
{
FT_UInt len = (FT_UInt)( ft_strlen( gname ) );
if ( len >= buffer_max )
len = buffer_max - 1;
FT_MEM_COPY( buffer, gname, len );
((FT_Byte*)buffer)[len] = 0;
}
return error;
}
static const char*
get_sfnt_postscript_name( TT_Face face )
{
FT_Int n, found_win, found_apple;
const char* result = NULL;
/* shouldn't happen, but just in case to avoid memory leaks */
if ( face->root.internal->postscript_name )
return face->root.internal->postscript_name;
/* scan the name table to see whether we have a Postscript name here, */
/* either in Macintosh or Windows platform encodings */
found_win = -1;
found_apple = -1;
for ( n = 0; n < face->num_names; n++ )
{
TT_NameEntryRec* name = face->name_table.names + n;
if ( name->nameID == 6 && name->stringLength > 0 )
{
if ( name->platformID == 3 &&
name->encodingID == 1 &&
name->languageID == 0x409 )
found_win = n;
if ( name->platformID == 1 &&
name->encodingID == 0 &&
name->languageID == 0 )
found_apple = n;
}
}
if ( found_win != -1 )
{
FT_Memory memory = face->root.memory;
TT_NameEntryRec* name = face->name_table.names + found_win;
FT_UInt len = name->stringLength / 2;
FT_Error error;
if ( !FT_ALLOC( result, name->stringLength + 1 ) )
{
FT_Stream stream = face->name_table.stream;
FT_String* r = (FT_String*)result;
FT_Byte* p = (FT_Byte*)name->string;
if ( FT_STREAM_SEEK( name->stringOffset ) ||
FT_FRAME_ENTER( name->stringLength ) )
{
FT_FREE( result );
name->stringLength = 0;
name->stringOffset = 0;
FT_FREE( name->string );
goto Exit;
}
p = (FT_Byte*)stream->cursor;
for ( ; len > 0; len--, p += 2 )
{
if ( p[0] == 0 && p[1] >= 32 && p[1] < 128 )
*r++ = p[1];
}
*r = '\0';
FT_FRAME_EXIT();
}
goto Exit;
}
if ( found_apple != -1 )
{
FT_Memory memory = face->root.memory;
TT_NameEntryRec* name = face->name_table.names + found_apple;
FT_UInt len = name->stringLength;
FT_Error error;
if ( !FT_ALLOC( result, len + 1 ) )
{
FT_Stream stream = face->name_table.stream;
if ( FT_STREAM_SEEK( name->stringOffset ) ||
FT_STREAM_READ( result, len ) )
{
name->stringOffset = 0;
name->stringLength = 0;
FT_FREE( name->string );
FT_FREE( result );
goto Exit;
}
((char*)result)[len] = '\0';
}
}
Exit:
face->root.internal->postscript_name = result;
return result;
}
#endif /* TT_CONFIG_OPTION_POSTSCRIPT_NAMES */
FT_CALLBACK_DEF( FT_Module_Interface )
sfnt_get_interface( FT_Module module,
const char* module_interface )
{
FT_UNUSED( module );
if ( ft_strcmp( module_interface, "get_sfnt" ) == 0 )
return (FT_Module_Interface)get_sfnt_table;
#ifdef TT_CONFIG_OPTION_POSTSCRIPT_NAMES
if ( ft_strcmp( module_interface, "glyph_name" ) == 0 )
return (FT_Module_Interface)get_sfnt_glyph_name;
#endif
if ( ft_strcmp( module_interface, "postscript_name" ) == 0 )
return (FT_Module_Interface)get_sfnt_postscript_name;
return 0;
}
static
const SFNT_Interface sfnt_interface =
{
tt_face_goto_table,
sfnt_init_face,
sfnt_load_face,
sfnt_done_face,
sfnt_get_interface,
tt_face_load_any,
tt_face_load_sfnt_header,
tt_face_load_directory,
tt_face_load_header,
tt_face_load_metrics_header,
tt_face_load_cmap,
tt_face_load_max_profile,
tt_face_load_os2,
tt_face_load_postscript,
tt_face_load_names,
tt_face_free_names,
tt_face_load_hdmx,
tt_face_free_hdmx,
tt_face_load_kern,
tt_face_load_gasp,
tt_face_load_pclt,
#ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS
/* see `ttload.h' */
tt_face_load_bitmap_header,
/* see `ttsbit.h' */
tt_face_set_sbit_strike,
tt_face_load_sbit_strikes,
tt_face_load_sbit_image,
tt_face_free_sbit_strikes,
#else /* TT_CONFIG_OPTION_EMBEDDED_BITMAPS */
0,
0,
0,
0,
0,
#endif /* TT_CONFIG_OPTION_EMBEDDED_BITMAPS */
#ifdef TT_CONFIG_OPTION_POSTSCRIPT_NAMES
/* see `ttpost.h' */
tt_face_get_ps_name,
tt_face_free_ps_names,
#else /* TT_CONFIG_OPTION_POSTSCRIPT_NAMES */
0,
0,
#endif /* TT_CONFIG_OPTION_POSTSCRIPT_NAMES */
/* see `ttcmap.h' */
tt_face_load_charmap,
tt_face_free_charmap,
};
FT_CALLBACK_TABLE_DEF
const FT_Module_Class sfnt_module_class =
{
0, /* not a font driver or renderer */
sizeof( FT_ModuleRec ),
"sfnt", /* driver name */
0x10000L, /* driver version 1.0 */
0x20000L, /* driver requires FreeType 2.0 or higher */
(const void*)&sfnt_interface, /* module specific interface */
(FT_Module_Constructor)0,
(FT_Module_Destructor) 0,
(FT_Module_Requester) sfnt_get_interface
};
/* END */