FontInstaller.cpp

#include "StdAfx.h"
#include ".\fontinstaller.h"

CFontInstaller::CFontInstaller()
{
        if(HMODULE hGdi = GetModuleHandle(_T("gdi32.dll")))
        {
                pAddFontMemResourceEx = (HANDLE (WINAPI *)(PVOID,DWORD,PVOID,DWORD*))GetProcAddress(hGdi, "AddFontMemResourceEx");
                pAddFontResourceEx = (int (WINAPI *)(LPCTSTR,DWORD,PVOID))GetProcAddress(hGdi, "AddFontResourceExA");
                pRemoveFontMemResourceEx = (BOOL (WINAPI *)(HANDLE))GetProcAddress(hGdi, "RemoveFontMemResourceEx");
                pRemoveFontResourceEx = (BOOL (WINAPI *)(LPCTSTR,DWORD,PVOID))GetProcAddress(hGdi, "RemoveFontResourceExA");
        }

        if(HMODULE hGdi = GetModuleHandle(_T("kernel32.dll")))
        {
                pMoveFileEx = (BOOL (WINAPI *)(LPCTSTR, LPCTSTR, DWORD))GetProcAddress(hGdi, "MoveFileExA");
        }
}

CFontInstaller::~CFontInstaller()
{
        UninstallFonts();
}

bool CFontInstaller::InstallFont(const CArray<BYTE>& data)
{
        return InstallFont(data.GetData(), data.GetSize());
}

bool CFontInstaller::InstallFont(const void* pData, UINT len)
{
        return InstallFontFile(pData, len) || InstallFontMemory(pData, len);
}

void CFontInstaller::UninstallFonts()
{
        if(pRemoveFontMemResourceEx)
        {
                POSITION pos = m_fonts.GetHeadPosition();
                while(pos) pRemoveFontMemResourceEx(m_fonts.GetNext(pos));
                m_fonts.RemoveAll();
        }

        if(pRemoveFontResourceEx)
        {
                POSITION pos = m_files.GetHeadPosition();
                while(pos)
                {
                        CString fn = m_files.GetNext(pos);
                        pRemoveFontResourceEx(fn, FR_PRIVATE, 0);
                        if(!DeleteFile(fn) && pMoveFileEx)
                                pMoveFileEx(fn, NULL, MOVEFILE_DELAY_UNTIL_REBOOT);
                }
                
                m_files.RemoveAll();
        }
}

bool CFontInstaller::InstallFontMemory(const void* pData, UINT len)
{
        if(!pAddFontMemResourceEx)
                return false;

        DWORD nFonts = 0;
        HANDLE hFont = pAddFontMemResourceEx((PVOID)pData, len, NULL, &nFonts);
        if(hFont && nFonts > 0) m_fonts.AddTail(hFont);
        return hFont && nFonts > 0;
}

bool CFontInstaller::InstallFontFile(const void* pData, UINT len)
{
        if(!pAddFontResourceEx) 
                return false;

        CFile f;
        TCHAR path[MAX_PATH], fn[MAX_PATH];
        if(!GetTempPath(MAX_PATH, path) || !GetTempFileName(path, _T("g_font"), 0, fn))
                return false;

        if(f.Open(fn, CFile::modeWrite))
        {
                f.Write(pData, len);
                f.Close();

                if(pAddFontResourceEx(fn, FR_PRIVATE, 0) > 0)
                {
                        m_files.AddTail(fn);
                        return true;
                }
        }

        DeleteFile(fn);
        return false;
}

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