Tremorblue
Programmer
I am trying to convert the following code (freely available on the net) into C++ Builder..
Its used to find the Name of a ttf font file. I have posted my attempt at the end ( I nearly have it done).
The code I am stuck on converting is this.
csTemp.ReleaseBuffer();
if(csTemp.GetLength() > 0)
{
csRetVal = csTemp;
break;
}
I can see the font file name is being read into lpszNameBuf when I debug.
Sometimes its ascii and sometimes unicode.
I tried using WideStringToChar and others to convert the unicode into normal ascii but never seems to work.
Can anyone help ?
--------------------------------------------------------
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_NAME_TABLE_HEADER{
USHORT uFSelector; //format selector. Always 0
USHORT uNRCount; //Name Records count
USHORT uStorageOffset; //Offset for strings storage, from start of the table
}TT_NAME_TABLE_HEADER;
typedef struct _tagTT_NAME_RECORD{
USHORT uPlatformID;
USHORT uEncodingID;
USHORT uLanguageID;
USHORT uNameID;
USHORT uStringLength;
USHORT uStringOffset; //from start of storage area
}TT_NAME_RECORD;
#define SWAPWORD(x) MAKEWORD(HIBYTE(x), LOBYTE(x))
#define SWAPLONG(x) MAKELONG(SWAPWORD(HIWORD(x)), SWAPWORD(LOWORD(x)))
CString GetFontNameFromFile(LPCTSTR lpszFilePath)
{
CFile f;
CString csRetVal;
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 csRetVal;
TT_TABLE_DIRECTORY tblDir;
BOOL bFound = 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("name")) == 0){
bFound = TRUE;
tblDir.uLength = SWAPLONG(tblDir.uLength);
tblDir.uOffset = SWAPLONG(tblDir.uOffset);
break;
}
}
if(bFound){
f.Seek(tblDir.uOffset, CFile::begin);
TT_NAME_TABLE_HEADER ttNTHeader;
f.Read(&ttNTHeader, sizeof(TT_NAME_TABLE_HEADER));
ttNTHeader.uNRCount = SWAPWORD(ttNTHeader.uNRCount);
ttNTHeader.uStorageOffset = SWAPWORD(ttNTHeader.uStorageOffset);
TT_NAME_RECORD ttRecord;
bFound = FALSE;
for(int i=0; i<ttNTHeader.uNRCount; i++){
f.Read(&ttRecord, sizeof(TT_NAME_RECORD));
ttRecord.uNameID = SWAPWORD(ttRecord.uNameID);
if(ttRecord.uNameID == 1){
ttRecord.uStringLength = SWAPWORD(ttRecord.uStringLength);
ttRecord.uStringOffset = SWAPWORD(ttRecord.uStringOffset);
int nPos = f.GetPosition();
f.Seek(tblDir.uOffset + ttRecord.uStringOffset + ttNTHeader.uStorageOffset, CFile::begin);
//bug fix: see the post by SimonSays to read more about it
TCHAR lpszNameBuf = csTemp.GetBuffer(ttRecord.uStringLength + 1);
ZeroMemory(lpszNameBuf, ttRecord.uStringLength + 1);
f.Read(lpszNameBuf, ttRecord.uStringLength);
csTemp.ReleaseBuffer();
if(csTemp.GetLength() > 0){
csRetVal = csTemp;
break;
}
f.Seek(nPos, CFile::begin);
}
}
}
f.Close();
}
return csRetVal;
}
This is my code...
//---------------------------------------------------------------------------
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_NAME_TABLE_HEADER{
USHORT uFSelector; //format selector. Always 0
USHORT uNRCount; //Name Records count
USHORT uStorageOffset; //Offset for strings storage, from start of the table
}TT_NAME_TABLE_HEADER;
typedef struct _tagTT_NAME_RECORD{
USHORT uPlatformID;
USHORT uEncodingID;
USHORT uLanguageID;
USHORT uNameID;
USHORT uStringLength;
USHORT uStringOffset; //from start of storage area
}TT_NAME_RECORD;
#define SWAPWORD(x) MAKEWORD(HIBYTE(x), LOBYTE(x))
#define SWAPLONG(x) MAKELONG(SWAPWORD(HIWORD(x)), SWAPWORD(LOWORD(x)))
AnsiString GetFontNameFromFile(char *sFileName)
{
AnsiString aTemp;
if(FileExists(sFileName))
{
int iFileHandle = FileOpen(sFileName, fmOpenRead);
int iFileLength = FileSeek(iFileHandle,0,2);
FileSeek(iFileHandle,0,0);
TT_OFFSET_TABLE ttOffsetTable;
FileRead(iFileHandle, &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 "";
TT_TABLE_DIRECTORY tblDir;
BOOL bFound = FALSE;
char csTemp[sizeof(TT_TABLE_DIRECTORY)+1];
for(int i=0; i< ttOffsetTable.uNumOfTables; i++){
FileRead(iFileHandle,&tblDir, sizeof(TT_TABLE_DIRECTORY));
strncpy(csTemp, tblDir.szTag, 4);
if(strncmp(csTemp,"name",4)== 0)
{
bFound = TRUE;
tblDir.uLength = SWAPLONG(tblDir.uLength);
tblDir.uOffset = SWAPLONG(tblDir.uOffset);
break;
}
}
if(bFound){
FileSeek(iFileHandle,(int)tblDir.uOffset,0);
TT_NAME_TABLE_HEADER ttNTHeader;
FileRead(iFileHandle,&ttNTHeader, sizeof(TT_NAME_TABLE_HEADER));
ttNTHeader.uNRCount = SWAPWORD(ttNTHeader.uNRCount);
ttNTHeader.uStorageOffset = SWAPWORD(ttNTHeader.uStorageOffset);
TT_NAME_RECORD ttRecord;
bFound = FALSE;
for(int i=0; i<ttNTHeader.uNRCount; i++){
FileRead(iFileHandle,&ttRecord, sizeof(TT_NAME_RECORD));
ttRecord.uNameID = SWAPWORD(ttRecord.uNameID);
if(ttRecord.uNameID == 1){
ttRecord.uStringLength = SWAPWORD(ttRecord.uStringLength);
ttRecord.uStringOffset = SWAPWORD(ttRecord.uStringOffset);
int nPos = FileSeek(iFileHandle,1,0);
FileSeek(iFileHandle,(int)(tblDir.uOffset + ttRecord.uStringOffset + ttNTHeader.uStorageOffset),0);
TCHAR lpszNameBuf[100];
ZeroMemory(lpszNameBuf,ttRecord.uStringLength+1);
FileRead(iFileHandle,lpszNameBuf,ttRecord.uStringLength);
// What goes here ???
FileSeek(iFileHandle,nPos,0);
}
}
}
FileClose(iFileHandle);
}
return aTemp;
}
Thanks TBlue
Its used to find the Name of a ttf font file. I have posted my attempt at the end ( I nearly have it done).
The code I am stuck on converting is this.
csTemp.ReleaseBuffer();
if(csTemp.GetLength() > 0)
{
csRetVal = csTemp;
break;
}
I can see the font file name is being read into lpszNameBuf when I debug.
Sometimes its ascii and sometimes unicode.
I tried using WideStringToChar and others to convert the unicode into normal ascii but never seems to work.
Can anyone help ?
--------------------------------------------------------
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_NAME_TABLE_HEADER{
USHORT uFSelector; //format selector. Always 0
USHORT uNRCount; //Name Records count
USHORT uStorageOffset; //Offset for strings storage, from start of the table
}TT_NAME_TABLE_HEADER;
typedef struct _tagTT_NAME_RECORD{
USHORT uPlatformID;
USHORT uEncodingID;
USHORT uLanguageID;
USHORT uNameID;
USHORT uStringLength;
USHORT uStringOffset; //from start of storage area
}TT_NAME_RECORD;
#define SWAPWORD(x) MAKEWORD(HIBYTE(x), LOBYTE(x))
#define SWAPLONG(x) MAKELONG(SWAPWORD(HIWORD(x)), SWAPWORD(LOWORD(x)))
CString GetFontNameFromFile(LPCTSTR lpszFilePath)
{
CFile f;
CString csRetVal;
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 csRetVal;
TT_TABLE_DIRECTORY tblDir;
BOOL bFound = 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("name")) == 0){
bFound = TRUE;
tblDir.uLength = SWAPLONG(tblDir.uLength);
tblDir.uOffset = SWAPLONG(tblDir.uOffset);
break;
}
}
if(bFound){
f.Seek(tblDir.uOffset, CFile::begin);
TT_NAME_TABLE_HEADER ttNTHeader;
f.Read(&ttNTHeader, sizeof(TT_NAME_TABLE_HEADER));
ttNTHeader.uNRCount = SWAPWORD(ttNTHeader.uNRCount);
ttNTHeader.uStorageOffset = SWAPWORD(ttNTHeader.uStorageOffset);
TT_NAME_RECORD ttRecord;
bFound = FALSE;
for(int i=0; i<ttNTHeader.uNRCount; i++){
f.Read(&ttRecord, sizeof(TT_NAME_RECORD));
ttRecord.uNameID = SWAPWORD(ttRecord.uNameID);
if(ttRecord.uNameID == 1){
ttRecord.uStringLength = SWAPWORD(ttRecord.uStringLength);
ttRecord.uStringOffset = SWAPWORD(ttRecord.uStringOffset);
int nPos = f.GetPosition();
f.Seek(tblDir.uOffset + ttRecord.uStringOffset + ttNTHeader.uStorageOffset, CFile::begin);
//bug fix: see the post by SimonSays to read more about it
TCHAR lpszNameBuf = csTemp.GetBuffer(ttRecord.uStringLength + 1);
ZeroMemory(lpszNameBuf, ttRecord.uStringLength + 1);
f.Read(lpszNameBuf, ttRecord.uStringLength);
csTemp.ReleaseBuffer();
if(csTemp.GetLength() > 0){
csRetVal = csTemp;
break;
}
f.Seek(nPos, CFile::begin);
}
}
}
f.Close();
}
return csRetVal;
}
This is my code...
//---------------------------------------------------------------------------
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_NAME_TABLE_HEADER{
USHORT uFSelector; //format selector. Always 0
USHORT uNRCount; //Name Records count
USHORT uStorageOffset; //Offset for strings storage, from start of the table
}TT_NAME_TABLE_HEADER;
typedef struct _tagTT_NAME_RECORD{
USHORT uPlatformID;
USHORT uEncodingID;
USHORT uLanguageID;
USHORT uNameID;
USHORT uStringLength;
USHORT uStringOffset; //from start of storage area
}TT_NAME_RECORD;
#define SWAPWORD(x) MAKEWORD(HIBYTE(x), LOBYTE(x))
#define SWAPLONG(x) MAKELONG(SWAPWORD(HIWORD(x)), SWAPWORD(LOWORD(x)))
AnsiString GetFontNameFromFile(char *sFileName)
{
AnsiString aTemp;
if(FileExists(sFileName))
{
int iFileHandle = FileOpen(sFileName, fmOpenRead);
int iFileLength = FileSeek(iFileHandle,0,2);
FileSeek(iFileHandle,0,0);
TT_OFFSET_TABLE ttOffsetTable;
FileRead(iFileHandle, &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 "";
TT_TABLE_DIRECTORY tblDir;
BOOL bFound = FALSE;
char csTemp[sizeof(TT_TABLE_DIRECTORY)+1];
for(int i=0; i< ttOffsetTable.uNumOfTables; i++){
FileRead(iFileHandle,&tblDir, sizeof(TT_TABLE_DIRECTORY));
strncpy(csTemp, tblDir.szTag, 4);
if(strncmp(csTemp,"name",4)== 0)
{
bFound = TRUE;
tblDir.uLength = SWAPLONG(tblDir.uLength);
tblDir.uOffset = SWAPLONG(tblDir.uOffset);
break;
}
}
if(bFound){
FileSeek(iFileHandle,(int)tblDir.uOffset,0);
TT_NAME_TABLE_HEADER ttNTHeader;
FileRead(iFileHandle,&ttNTHeader, sizeof(TT_NAME_TABLE_HEADER));
ttNTHeader.uNRCount = SWAPWORD(ttNTHeader.uNRCount);
ttNTHeader.uStorageOffset = SWAPWORD(ttNTHeader.uStorageOffset);
TT_NAME_RECORD ttRecord;
bFound = FALSE;
for(int i=0; i<ttNTHeader.uNRCount; i++){
FileRead(iFileHandle,&ttRecord, sizeof(TT_NAME_RECORD));
ttRecord.uNameID = SWAPWORD(ttRecord.uNameID);
if(ttRecord.uNameID == 1){
ttRecord.uStringLength = SWAPWORD(ttRecord.uStringLength);
ttRecord.uStringOffset = SWAPWORD(ttRecord.uStringOffset);
int nPos = FileSeek(iFileHandle,1,0);
FileSeek(iFileHandle,(int)(tblDir.uOffset + ttRecord.uStringOffset + ttNTHeader.uStorageOffset),0);
TCHAR lpszNameBuf[100];
ZeroMemory(lpszNameBuf,ttRecord.uStringLength+1);
FileRead(iFileHandle,lpszNameBuf,ttRecord.uStringLength);
// What goes here ???
FileSeek(iFileHandle,nPos,0);
}
}
}
FileClose(iFileHandle);
}
return aTemp;
}
Thanks TBlue
