保存DDB.

关于保存：
    很多人在用双援冲画完图之后，都不懂得如何把那个Compatible的BMP保存，偶在这里提供一个直接把DDB保存为24Bit DIB的函数：

BOOL SaveBMP( HBITMAP hBmp, const CString &szFileName ){ if( hBmp == NULL || szFileName.IsEmpty() ) return FALSE; BITMAP bm; GetObject( hBmp, sizeof( BITMAP ), &bm ); long lWidth = bm.bmWidth; long lHeight = bm.bmHeight; BITMAPINFOHEADER bmih = { 0 }; BITMAPFILEHEADER bmfh = { 0 }; HBITMAP hBitmap; LPVOID lpBits; HDC hMemDC1, hMemDC2; bmih.biSize = sizeof( BITMAPINFOHEADER ); bmih.biBitCount = 24; bmih.biWidth = lWidth; bmih.biHeight = lHeight; bmih.biPlanes = 1; HDC hDC = ::GetDC( NULL ); if( !hDC ) return FALSE; hBitmap = CreateDIBSection( hDC, ( CONST LPBITMAPINFO )&bmih, DIB_RGB_COLORS, &lpBits, NULL, 0 ); if( !hBitmap ){ ::ReleaseDC( NULL, hDC ); return FALSE; } hMemDC1 = CreateCompatibleDC( hDC ); hMemDC2 = CreateCompatibleDC( hDC ); HBITMAP hOld = ( HBITMAP )SelectObject( hMemDC1, hBmp ); HBITMAP hNew = ( HBITMAP )SelectObject( hMemDC2, hBitmap ); BitBlt( hMemDC2, 0, 0, lWidth, lHeight, hMemDC1, 0, 0, SRCCOPY ); SelectObject( hMemDC1, hOld ); SelectObject( hMemDC2, hNew ); DeleteDC( hMemDC1 ); DeleteDC( hMemDC2 ); ::ReleaseDC( NULL, hDC ); GdiFlush(); DWORD dwImageSize = ( ( ( ( lWidth * 24 ) + 31 ) >> 5 ) << 2 ) * lHeight; // now save bmfh.bfType = 0x4d42; bmfh.bfSize = sizeof( BITMAPFILEHEADER ) + sizeof( BITMAPINFOHEADER ) + dwImageSize; bmfh.bfOffBits = sizeof( BITMAPFILEHEADER ) + sizeof( BITMAPINFOHEADER ); CFile file( szFileName, CFile::modeCreate | CFile::modeWrite ); file.Write( &bmfh, sizeof( BITMAPFILEHEADER ) ); file.Write( &bmih, sizeof( BITMAPINFOHEADER ) ); file.Write( lpBits, dwImageSize ); DeleteObject( hBitmap ); return TRUE; // BY Lambochan 2009/7/3}

 

 

调用的时候，只要把准备保存的BMP和文件名字当参数传入，就可以保存为DIB，例如：
CBitmap bitmap;
bitmap.CreateCompatibleBitmap( &dc, w, h );
xxxxxxx;
保存时:
if( SaveBMP( ( HBITMAP )bitmap.GetSafeHandle(), "Hello.bmp" ) ){
    AfxMessageBox( "OK!" );
}

ok~~  good luck~~
下次见，拜拜...