C++保存图像数据至BMP文件

BOOL savebitmap(const BITMAPINFOHEADER* pHeader, const char* data, int nImgW, int nImgH, const char* filename)
{
    BITMAPINFOHEADER bmiHdr; //定义信息头        
        bmiHdr.biSize = sizeof(BITMAPINFOHEADER);          
        bmiHdr.biWidth = nImgW;   
        bmiHdr.biHeight = nImgH;   
        bmiHdr.biPlanes = 1;   
        bmiHdr.biBitCount = 24;   
        bmiHdr.biCompression = BI_RGB;   
        bmiHdr.biSizeImage = nImgW*nImgH*3; 
        bmiHdr.biXPelsPerMeter = 0;   
        bmiHdr.biYPelsPerMeter = 0;  
        bmiHdr.biClrUsed = 0;
        bmiHdr.biClrImportant = 0; 
        FILE* fp = fopen(filename, "wb");
    if (fp)
    {
        BITMAPFILEHEADER fheader = { 0 };
        fheader.bfType = 'M' << 8 | 'B';
        fheader.bfSize = sizeof(BITMAPINFOHEADER) + sizeof(BITMAPFILEHEADER) + pHeader->biSizeImage;
        fheader.bfOffBits = sizeof(BITMAPINFOHEADER) + sizeof(BITMAPFILEHEADER);
        fwrite(&fheader, 1, sizeof(fheader), fp);
        fwrite(pHeader, 1, sizeof(BITMAPINFOHEADER), fp);
        fwrite(data, 1, bmiHdr.biSizeImage, fp);
        fclose(fp);        
        return TRUE;
    }
    else
      return FALSE;
}