63 lines
2.1 KiB
C++
63 lines
2.1 KiB
C++
#ifndef _INC_FONTEXT_FONTFILE
|
|
#define _INC_FONTEXT_FONTFILE
|
|
|
|
class CFontFileIo;
|
|
|
|
//
|
|
// This class provides an abstraction that hides the differences required to read
|
|
// compressed and non-compressed font files. The font folder was originally written
|
|
// to use the LZ APIs provided in LZ32.DLL for all reading of font files. These
|
|
// APIs work with compressed and non-compressed files. The problems is that the
|
|
// APIs are very old and are based on the OpenFile API and DOS file handles. This
|
|
// means they're not UNICODE aware and have a maximum path length of 128 characters.
|
|
// So, even though compressed font files are rare today, all font files are
|
|
// subject to these limitations in the font folder. The LZ APIs are considered
|
|
// legacy code and are not going to be being modified.
|
|
//
|
|
// Since we can't modify the LZ APIs I decided to create this CFontFile class
|
|
// which defers the IO functionality to a properly-typed subclass. Non-compressed
|
|
// files are handled with Win32 functions (i.e. CreateFile, ReadFile etc).
|
|
// Compressed files are handled with LZ functions (i.e. LZOpenFile, LZRead etc).
|
|
// This means that the UNICODE and path length restrictions only affect compressed
|
|
// files and that non-compressed files (the vast majority today) are unaffected.
|
|
//
|
|
// brianau [3/1/99]
|
|
//
|
|
class CFontFile
|
|
{
|
|
public:
|
|
CFontFile(void)
|
|
: m_pImpl(NULL) { }
|
|
|
|
~CFontFile(void);
|
|
|
|
DWORD Open(LPCTSTR pszPath, DWORD dwAccess, DWORD dwShareMode, bool bCreate = false);
|
|
|
|
void Close(void);
|
|
|
|
DWORD Read(LPVOID pbDest, DWORD cbDest, LPDWORD pcbRead = NULL);
|
|
|
|
DWORD Seek(UINT uDistance, DWORD dwMethod);
|
|
|
|
DWORD Reset(void)
|
|
{ return Seek(0, FILE_BEGIN); }
|
|
|
|
DWORD GetExpandedName(LPCTSTR pszFile, LPTSTR pszDest, UINT cchDest);
|
|
|
|
DWORD CopyTo(LPCTSTR pszTo);
|
|
|
|
private:
|
|
CFontFileIo *m_pImpl; // Properly-typed implementation.
|
|
|
|
bool IsCompressed(void);
|
|
|
|
//
|
|
// Prevent copy.
|
|
//
|
|
CFontFile(const CFontFile& rhs);
|
|
CFontFile& operator = (const CFontFile& rhs);
|
|
};
|
|
|
|
|
|
#endif // _INC_FONTEXT_FONTFILE
|