/*static */
bool display_t::save_bitmap(const char *szFileName, HBITMAP bmp, HPALETTE pal /*= NULL*/)
{
START_FUNCTION_BOOL();
PICTDESC pdPictDesc;
pdPictDesc.cbSizeofstruct = sizeof(PICTDESC);
pdPictDesc.picType = PICTYPE_BITMAP;
pdPictDesc.bmp.hbitmap = bmp;
pdPictDesc.bmp.hpal = pal;
LPPICTURE plPicture = NULL;
HRESULT hResult = OleCreatePictureIndirect(&pdPictDesc, IID_IPicture, false, reinterpret_cast<void**>(&plPicture));
if (!SUCCEEDED(hResult))
{
break;
}
LPSTREAM lpStream = NULL;
hResult = CreateStreamOnHGlobal(0, true, &lpStream);
if (!SUCCEEDED(hResult))
{
plPicture->Release();
return false;
}
LONG lBytesStreamed = 0;
hResult = plPicture->SaveAsFile(lpStream, true, &lBytesStreamed);
HANDLE hFile = CreateFileA(szFileName, GENERIC_WRITE, FILE_SHARE_READ, 0,
CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, 0);
if (!SUCCEEDED(hResult) || !hFile)
{
lpStream->Release();
plPicture->Release();
break;
}
HGLOBAL hgMemory = 0;
GetHGlobalFromStream(lpStream, &hgMemory);
LPVOID lpData = GlobalLock(hgMemory);
DWORD dwBytesWritten = 0;
bool bResult = !!WriteFile(hFile, lpData, lBytesStreamed, &dwBytesWritten, 0);
bResult &= (dwBytesWritten == static_cast<DWORD>(lBytesStreamed));
GlobalUnlock(hgMemory);
CloseHandle(hFile);
lpStream->Release();
plPicture->Release();
END_FUNCTION_BOOL();
}
/////////////////////////////////////////////////////////////////////////////////////////
// Utility to save a bitmap to file for later examination. Used for debugging only.
// Based on an article by "gelbert" on www.experts-exchange.com at
// http://www.experts-exchange.com/Programming/Programming_Languages/MFC/Q_20193761.html
//
// This version is a member function and instead of taking an HBITMAP as the 2nd
// parameter, it take a reference to a CBitmap. Otherwise, it is identical.
/////////////////////////////////////////////////////////////////////////////////////////
BOOL CSliderCtrlEx::SaveBitmap(LPCSTR lpFileName, CBitmap &hBitmap, HPALETTE hPal)
{
BOOL bResult = FALSE;
PICTDESC stPictDesc;
stPictDesc.cbSizeofstruct = sizeof(PICTDESC);
stPictDesc.picType = PICTYPE_BITMAP;
stPictDesc.bmp.hbitmap = hBitmap;
stPictDesc.bmp.hpal = hPal;
LPPICTURE pPicture;
HRESULT hr = OleCreatePictureIndirect( &stPictDesc, IID_IPicture, FALSE,
reinterpret_cast<void**>(&pPicture) );
if ( SUCCEEDED(hr) )
{
LPSTREAM pStream;
hr = CreateStreamOnHGlobal( NULL, TRUE, &pStream );
if ( SUCCEEDED(hr) )
{
long lBytesStreamed = 0;
hr = pPicture->SaveAsFile( pStream, TRUE, &lBytesStreamed );
if ( SUCCEEDED(hr) )
{
HANDLE hFile = CreateFile(_T(lpFileName),
GENERIC_WRITE,
FILE_SHARE_READ,
NULL,
CREATE_ALWAYS,
FILE_ATTRIBUTE_NORMAL,
NULL );
if ( hFile )
{
HGLOBAL hMem = NULL;
GetHGlobalFromStream( pStream, &hMem );
LPVOID lpData = GlobalLock( hMem );
DWORD dwBytesWritten;
bResult = WriteFile( hFile, lpData, lBytesStreamed, &dwBytesWritten, NULL );
bResult &= ( dwBytesWritten == (DWORD)lBytesStreamed );
// clean up
GlobalUnlock(hMem);
CloseHandle(hFile);
}
}
// clean up
pStream->Release();
}
// clean up
pPicture->Release();
}
return bResult;
}