📄 ttload.c
字号:
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
};
/* 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 )
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_TRACE3(( "sTypoAscender: %4d\n", os2->sTypoAscender ));
FT_TRACE3(( "sTypoDescender: %4d\n", os2->sTypoDescender ));
FT_TRACE3(( "usWinAscent: %4u\n", os2->usWinAscent ));
FT_TRACE3(( "usWinDescent: %4u\n", os2->usWinDescent ));
FT_TRACE3(( "fsSelection: 0x%2x\n", os2->fsSelection ));
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_post( 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
};
error = face->goto_table( face, TTAG_post, stream, 0 );
if ( error )
return error;
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_TRACE3(( "FormatType: 0x%x\n", post->FormatType ));
FT_TRACE3(( "isFixedPitch: %s\n", post->isFixedPitch
? " yes" : " no" ));
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;
/* optional table */
error = face->goto_table( face, TTAG_PCLT, stream, 0 );
if ( error )
goto Exit;
if ( FT_STREAM_READ_FIELDS( pclt_fields, pclt ) )
goto Exit;
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;
/* the gasp table is optional */
error = face->goto_table( face, TTAG_gasp, stream, 0 );
if ( error )
goto Exit;
if ( FT_FRAME_ENTER( 4L ) )
goto Exit;
face->gasp.version = FT_GET_USHORT();
face->gasp.numRanges = FT_GET_USHORT();
FT_FRAME_EXIT();
/* only support versions 0 and 1 of the table */
if ( face->gasp.version >= 2 )
{
face->gasp.numRanges = 0;
error = SFNT_Err_Invalid_Table;
goto Exit;
}
num_ranges = face->gasp.numRanges;
FT_TRACE3(( "numRanges: %u\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++ )
{
gaspranges[j].maxPPEM = FT_GET_USHORT();
gaspranges[j].gaspFlag = FT_GET_USHORT();
FT_TRACE3(( "gaspRange %d: rangeMaxPPEM %5d, rangeGaspBehavior 0x%x\n",
j,
gaspranges[j].maxPPEM,
gaspranges[j].gaspFlag ));
}
FT_FRAME_EXIT();
Exit:
return error;
}
/* END */
⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -