📄 ttload.c
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}
Exit:
return error;
}
/*************************************************************************/
/* */
/* <Function> */
/* tt_face_load_os2 */
/* */
/* <Description> */
/* Loads the OS2 table. */
/* */
/* <Input> */
/* face :: A handle to the target face object. */
/* */
/* stream :: A handle to the input stream. */
/* */
/* <Return> */
/* FreeType error code. 0 means success. */
/* */
FT_LOCAL_DEF( FT_Error )
tt_face_load_os2( TT_Face face,
FT_Stream stream )
{
FT_Error error;
TT_OS2* os2;
const FT_Frame_Field os2_fields[] =
{
#undef FT_STRUCTURE
#define FT_STRUCTURE TT_OS2
FT_FRAME_START( 78 ),
FT_FRAME_USHORT( version ),
FT_FRAME_SHORT ( xAvgCharWidth ),
FT_FRAME_USHORT( usWeightClass ),
FT_FRAME_USHORT( usWidthClass ),
FT_FRAME_SHORT ( fsType ),
FT_FRAME_SHORT ( ySubscriptXSize ),
FT_FRAME_SHORT ( ySubscriptYSize ),
FT_FRAME_SHORT ( ySubscriptXOffset ),
FT_FRAME_SHORT ( ySubscriptYOffset ),
FT_FRAME_SHORT ( ySuperscriptXSize ),
FT_FRAME_SHORT ( ySuperscriptYSize ),
FT_FRAME_SHORT ( ySuperscriptXOffset ),
FT_FRAME_SHORT ( ySuperscriptYOffset ),
FT_FRAME_SHORT ( yStrikeoutSize ),
FT_FRAME_SHORT ( yStrikeoutPosition ),
FT_FRAME_SHORT ( sFamilyClass ),
FT_FRAME_BYTE ( panose[0] ),
FT_FRAME_BYTE ( panose[1] ),
FT_FRAME_BYTE ( panose[2] ),
FT_FRAME_BYTE ( panose[3] ),
FT_FRAME_BYTE ( panose[4] ),
FT_FRAME_BYTE ( panose[5] ),
FT_FRAME_BYTE ( panose[6] ),
FT_FRAME_BYTE ( panose[7] ),
FT_FRAME_BYTE ( panose[8] ),
FT_FRAME_BYTE ( panose[9] ),
FT_FRAME_ULONG ( ulUnicodeRange1 ),
FT_FRAME_ULONG ( ulUnicodeRange2 ),
FT_FRAME_ULONG ( ulUnicodeRange3 ),
FT_FRAME_ULONG ( ulUnicodeRange4 ),
FT_FRAME_BYTE ( achVendID[0] ),
FT_FRAME_BYTE ( achVendID[1] ),
FT_FRAME_BYTE ( achVendID[2] ),
FT_FRAME_BYTE ( achVendID[3] ),
FT_FRAME_USHORT( fsSelection ),
FT_FRAME_USHORT( usFirstCharIndex ),
FT_FRAME_USHORT( usLastCharIndex ),
FT_FRAME_SHORT ( sTypoAscender ),
FT_FRAME_SHORT ( sTypoDescender ),
FT_FRAME_SHORT ( sTypoLineGap ),
FT_FRAME_USHORT( usWinAscent ),
FT_FRAME_USHORT( usWinDescent ),
FT_FRAME_END
};
const FT_Frame_Field os2_fields_extra[] =
{
FT_FRAME_START( 8 ),
FT_FRAME_ULONG( ulCodePageRange1 ),
FT_FRAME_ULONG( ulCodePageRange2 ),
FT_FRAME_END
};
const FT_Frame_Field os2_fields_extra2[] =
{
FT_FRAME_START( 10 ),
FT_FRAME_SHORT ( sxHeight ),
FT_FRAME_SHORT ( sCapHeight ),
FT_FRAME_USHORT( usDefaultChar ),
FT_FRAME_USHORT( usBreakChar ),
FT_FRAME_USHORT( usMaxContext ),
FT_FRAME_END
};
FT_TRACE2(( "OS/2 Table " ));
/* We now support old Mac fonts where the OS/2 table doesn't */
/* exist. Simply put, we set the `version' field to 0xFFFF */
/* and test this value each time we need to access the table. */
error = face->goto_table( face, TTAG_OS2, stream, 0 );
if ( error )
{
FT_TRACE2(( "is missing!\n" ));
face->os2.version = 0xFFFFU;
error = SFNT_Err_Ok;
goto Exit;
}
os2 = &face->os2;
if ( FT_STREAM_READ_FIELDS( os2_fields, os2 ) )
goto Exit;
os2->ulCodePageRange1 = 0;
os2->ulCodePageRange2 = 0;
os2->sxHeight = 0;
os2->sCapHeight = 0;
os2->usDefaultChar = 0;
os2->usBreakChar = 0;
os2->usMaxContext = 0;
if ( os2->version >= 0x0001 )
{
/* only version 1 tables */
if ( FT_STREAM_READ_FIELDS( os2_fields_extra, os2 ) )
goto Exit;
if ( os2->version >= 0x0002 )
{
/* only version 2 tables */
if ( FT_STREAM_READ_FIELDS( os2_fields_extra2, os2 ) )
goto Exit;
}
}
FT_TRACE2(( "loaded\n" ));
Exit:
return error;
}
/*************************************************************************/
/* */
/* <Function> */
/* tt_face_load_postscript */
/* */
/* <Description> */
/* Loads the Postscript table. */
/* */
/* <Input> */
/* face :: A handle to the target face object. */
/* */
/* stream :: A handle to the input stream. */
/* */
/* <Return> */
/* FreeType error code. 0 means success. */
/* */
FT_LOCAL_DEF( FT_Error )
tt_face_load_postscript( TT_Face face,
FT_Stream stream )
{
FT_Error error;
TT_Postscript* post = &face->postscript;
static const FT_Frame_Field post_fields[] =
{
#undef FT_STRUCTURE
#define FT_STRUCTURE TT_Postscript
FT_FRAME_START( 32 ),
FT_FRAME_ULONG( FormatType ),
FT_FRAME_ULONG( italicAngle ),
FT_FRAME_SHORT( underlinePosition ),
FT_FRAME_SHORT( underlineThickness ),
FT_FRAME_ULONG( isFixedPitch ),
FT_FRAME_ULONG( minMemType42 ),
FT_FRAME_ULONG( maxMemType42 ),
FT_FRAME_ULONG( minMemType1 ),
FT_FRAME_ULONG( maxMemType1 ),
FT_FRAME_END
};
FT_TRACE2(( "PostScript " ));
error = face->goto_table( face, TTAG_post, stream, 0 );
if ( error )
return SFNT_Err_Post_Table_Missing;
if ( FT_STREAM_READ_FIELDS( post_fields, post ) )
return error;
/* we don't load the glyph names, we do that in another */
/* module (ttpost). */
FT_TRACE2(( "loaded\n" ));
return SFNT_Err_Ok;
}
/*************************************************************************/
/* */
/* <Function> */
/* tt_face_load_pclt */
/* */
/* <Description> */
/* Loads the PCL 5 Table. */
/* */
/* <Input> */
/* face :: A handle to the target face object. */
/* */
/* stream :: A handle to the input stream. */
/* */
/* <Return> */
/* FreeType error code. 0 means success. */
/* */
FT_LOCAL_DEF( FT_Error )
tt_face_load_pclt( TT_Face face,
FT_Stream stream )
{
static const FT_Frame_Field pclt_fields[] =
{
#undef FT_STRUCTURE
#define FT_STRUCTURE TT_PCLT
FT_FRAME_START( 54 ),
FT_FRAME_ULONG ( Version ),
FT_FRAME_ULONG ( FontNumber ),
FT_FRAME_USHORT( Pitch ),
FT_FRAME_USHORT( xHeight ),
FT_FRAME_USHORT( Style ),
FT_FRAME_USHORT( TypeFamily ),
FT_FRAME_USHORT( CapHeight ),
FT_FRAME_BYTES ( TypeFace, 16 ),
FT_FRAME_BYTES ( CharacterComplement, 8 ),
FT_FRAME_BYTES ( FileName, 6 ),
FT_FRAME_CHAR ( StrokeWeight ),
FT_FRAME_CHAR ( WidthType ),
FT_FRAME_BYTE ( SerifStyle ),
FT_FRAME_BYTE ( Reserved ),
FT_FRAME_END
};
FT_Error error;
TT_PCLT* pclt = &face->pclt;
FT_TRACE2(( "PCLT " ));
/* optional table */
error = face->goto_table( face, TTAG_PCLT, stream, 0 );
if ( error )
{
FT_TRACE2(( "missing (optional)\n" ));
pclt->Version = 0;
return SFNT_Err_Ok;
}
if ( FT_STREAM_READ_FIELDS( pclt_fields, pclt ) )
goto Exit;
FT_TRACE2(( "loaded\n" ));
Exit:
return error;
}
/*************************************************************************/
/* */
/* <Function> */
/* tt_face_load_gasp */
/* */
/* <Description> */
/* Loads the `gasp' table into a face object. */
/* */
/* <Input> */
/* face :: A handle to the target face object. */
/* */
/* stream :: The input stream. */
/* */
/* <Return> */
/* FreeType error code. 0 means success. */
/* */
FT_LOCAL_DEF( FT_Error )
tt_face_load_gasp( TT_Face face,
FT_Stream stream )
{
FT_Error error;
FT_Memory memory = stream->memory;
FT_UInt j,num_ranges;
TT_GaspRange gaspranges;
FT_TRACE2(( "tt_face_load_gasp: %08p\n", face ));
/* the gasp table is optional */
error = face->goto_table( face, TTAG_gasp, stream, 0 );
if ( error )
return SFNT_Err_Ok;
if ( FT_FRAME_ENTER( 4L ) )
goto Exit;
face->gasp.version = FT_GET_USHORT();
face->gasp.numRanges = FT_GET_USHORT();
FT_FRAME_EXIT();
num_ranges = face->gasp.numRanges;
FT_TRACE3(( "number of ranges = %d\n", num_ranges ));
if ( FT_QNEW_ARRAY( gaspranges, num_ranges ) ||
FT_FRAME_ENTER( num_ranges * 4L ) )
goto Exit;
face->gasp.gaspRanges = gaspranges;
for ( j = 0; j < num_ranges; j++ )
{
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