将24位及32位图像数据保存到位图中

BOOL SaveImageDataToBMP( LPCTSTR lpFileName, DWORD width, DWORD height, DWORD bits, void* pData )
{
if( bits != 24 && bits != 32 )
return FALSE;
BITMAPFILEHEADER bfh;
ZeroMemory( &bfh, sizeof(BITMAPFILEHEADER) );

bfh.bfType = ((WORD)('M'<<8)|'B');
bfh.bfSize = 0;
bfh.bfReserved2 = 0;
bfh.bfReserved1 = 0;
bfh.bfOffBits = sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER);

BITMAPINFO BitmapInfo;
BitmapInfo.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
BitmapInfo.bmiHeader.biPlanes = 1;
BitmapInfo.bmiHeader.biBitCount = bits;
BitmapInfo.bmiHeader.biCompression = BI_RGB;
BitmapInfo.bmiHeader.biSizeImage = 0;
BitmapInfo.bmiHeader.biXPelsPerMeter = 0;
BitmapInfo.bmiHeader.biYPelsPerMeter = 0;
BitmapInfo.bmiHeader.biClrUsed = 0;
BitmapInfo.bmiHeader.biClrImportant = 0;
BitmapInfo.bmiHeader.biWidth = width;
BitmapInfo.bmiHeader.biHeight = height;

int dwPitch = width * bits / 8;
while( dwPitch % 4 != 0 )
dwPitch++;

FILE* pFile = _tfopen( lpFileName, _T("wb") );
fwrite( &bfh, sizeof(BITMAPFILEHEADER), 1, pFile );
fwrite( &BitmapInfo, sizeof(BITMAPINFOHEADER), 1, pFile );
fwrite( pData, sizeof(char), height * dwPitch, pFile );
fclose( pFile );
return TRUE;
}