Help: problem with OS/2 table

Question

I try programmicaly read OS/2 table.
First part of table I read without problems, but with the second there are some problems. For example, I want obtain fsSelection value, and for any font this value equal 32(bold). When I obtain macStyle from HEAD table, all right. But values of macStyle and fsSelection must be identical! In what there can be a problem?

Answer 1

My Code:
But in panose and vendor information is right. And method of working with tables is the same. But problems only with this table, and I don't know why :(
typedef struct _tagTT_OFFSET_TABLE{
USHORT uMajorVersion;
USHORT uMinorVersion;
USHORT uNumOfTables;
USHORT uSearchRange;
USHORT uEntrySelector;
USHORT uRangeShift;
}TT_OFFSET_TABLE;
typedef struct _tagTT_TABLE_DIRECTORY{
char szTag[4]; //table name
ULONG uCheckSum; //Check sum
ULONG uOffset; //Offset from beginning of file
ULONG uLength; //length of the table in bytes
}TT_TABLE_DIRECTORY;
typedef struct _tagTT_OS_RECORD{
USHORT version;
SHORT xAvgCharWidth;
USHORT usWeightClass;
USHORT usWidthClass;
SHORT fsType;
SHORT ySubscriptXSize;
SHORT ySubscriptYSize;
SHORT ySubscriptXOffset;
SHORT ySubscriptYOffset;
SHORT ySuperscriptXSize;
SHORT ySuperscriptYSize;
SHORT ySuperscriptXOffset;
SHORT ySuperscriptYOffset;
SHORT yStrikeoutSize;
SHORT yStrikeoutPosition;
SHORT sFamilyClass;
PANOSE panose;
ULONG ulUnicodeRange1;
ULONG ulUnicodeRange2;
ULONG ulUnicodeRange3;
ULONG ulUnicodeRange4;
CHAR achVendID[4];
USHORT fsSelection;
USHORT usFirstCharIndex;
USHORT usLastCharIndex;
USHORT sTypoAscender;
USHORT sTypoDescender;
USHORT sTypoLineGap;
USHORT usWinAscent;
USHORT usWinDescent;
ULONG ulCodePageRange[2];
}TT_OS_RECORD;
// structure for writing results
typedef struct _tagFONT_PROPERTIES{
CString csName;
USHORT Weight;
USHORT Width;
BOOL bItalic;
BOOL bUnderline;
BOOL bStrikeOut;
USHORT uFamily;
}FONT_PROPERTIES, *LPFONT_PROPERTIES;
// from Big Endian to Little Endian
#define SWAPWORD(x) MAKEWORD(HIBYTE(x), LOBYTE(x))
#define SWAPLONG(x) MAKELONG(SWAPWORD(HIWORD(x)), SWAPWORD(LOWORD(x)))
LPFONT_PROPERTIES lpFontProps = new FONT_PROPERTIES;
CString pstrName = "C:\\WINDOWS\\Fonts\\ANTQUABI.TTF";
lpFontProps->csName = "";
GetFontPropertiesFromOS(pstrName, lpFontProps);
BOOL CMyDlg::GetFontPropertiesFromOS(LPCTSTR lpszFilePath, LPFONT_PROPERTIES lpFontProps)
CFile f;
BOOL bRetVal = FALSE;
if(f.Open(lpszFilePath, CFile::modeRead|CFile::shareDenyWrite)){
TT_OFFSET_TABLE ttOffsetTable;
f.Read(&ttOffsetTable, sizeof(TT_OFFSET_TABLE));
ttOffsetTable.uNumOfTables = SWAPWORD(ttOffsetTable.uNumOfTables);
ttOffsetTable.uMajorVersion = SWAPWORD(ttOffsetTable.uMajorVersion);
ttOffsetTable.uMinorVersion = SWAPWORD(ttOffsetTable.uMinorVersion);
//check is this is a true type font and the version is 1.0
if(ttOffsetTable.uMajorVersion != 1 || ttOffsetTable.uMinorVersion != 0)
return bRetVal;
TT_TABLE_DIRECTORY tblDir;
BOOL bFoundOS = FALSE;
CString csTemp;
for(int i=0; i< ttOffsetTable.uNumOfTables; i++){
f.Read(&tblDir, sizeof(TT_TABLE_DIRECTORY));
strncpy(csTemp.GetBuffer(5), tblDir.szTag, 4);
csTemp.ReleaseBuffer(4);
if(csTemp.CompareNoCase(_T("OS/2")) == 0){
bFoundOS = TRUE;
tblDir.uLength = SWAPLONG(tblDir.uLength);
tblDir.uOffset = SWAPLONG(tblDir.uOffset);
break;
else if(csTemp.IsEmpty())
break;
if(bFoundOS)
int nPos = f.GetPosition();
f.Seek(tblDir.uOffset, CFile::begin);
TT_OS_RECORD ttOSRecord;
bFoundOS = FALSE;
if(lpFontProps->csName.IsEmpty())
f.Read(&ttOSRecord, sizeof(TT_OS_RECORD));
ttOSRecord.version = SWAPWORD(ttOSRecord.version);
lpFontProps->Weight = SWAPWORD(ttOSRecord.usWeightClass);
lpFontProps->Width = SWAPWORD(ttOSRecord.usWidthClass);
ttOSRecord.sFamilyClass = SWAPWORD(ttOSRecord.sFamilyClass);
// high byte of this field contains the family class
BYTE hb = HIBYTE(ttOSRecord.sFamilyClass);
// low byte contains the family subclass
BYTE lb = LOBYTE(ttOSRecord.sFamilyClass);
ttOSRecord.fsSelection = SWAPWORD(ttOSRecord.fsSelection); // this is always 32
lpFontProps->uFamily = ttOSRecord.panose.bFamilyType;
ttOSRecord.usFirstCharIndex = SWAPWORD(ttOSRecord.usFirstCharIndex);
bRetVal = TRUE;
f.Close();
return bRetVal;