图片字节流生成bmp文件

Posted 2020-10-11 风的哀伤

 1     BITMAPFILEHEADER   bfh;//文件头
 2     bfh.bfType=0x4d42;
 3     bfh.bfOffBits=sizeof(bfh)+sizeof(BITMAPINFOHEADER);
 4     bfh.bfSize=bfh.bfOffBits+m_nWidth*m_nHeight*3;
 5     bfh.bfReserved1=0;
 6     bfh.bfReserved2=0;
 7 
 8     CFile   file;
 9     CFileFind findFile;
10     if (findFile.FindFile(strpath))
11     {
12         file.Remove(strpath);
13     }
14 
15     if(!file.Open(strpath,CFile::modeCreate|CFile::modeRead|CFile::modeWrite))
16     {
17         AfxMessageBox("error!");
18         return;
19     }
20     file.Write(&bfh,sizeof(bfh));  
21     file.Write(m_pBmpInfo,sizeof(BITMAPINFOHEADER));  
22     file.Write(m_pBmpData,m_nWidth*m_nHeight*3);  
23     file.Close();

PS：位图信息头文件定义

 1         BITMAPINFO* m_pBmpInfo = new BITMAPINFO[sizeof(BITMAPINFOHEADER)+sizeof(RGBQUAD)];
 2         m_pBmpInfo->bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
 3         m_pBmpInfo->bmiHeader.biBitCount = 24;
 4         m_pBmpInfo->bmiHeader.biWidth = m_nWidth;
 5         m_pBmpInfo->bmiHeader.biHeight = 0-m_nHeight;
 6         m_pBmpInfo->bmiHeader.biPlanes = 1;
 7         m_pBmpInfo->bmiHeader.biCompression = BI_RGB;
 8         m_pBmpInfo->bmiHeader.biSizeImage = 0;
 9         m_pBmpInfo->bmiHeader.biXPelsPerMeter = 0;
10         m_pBmpInfo->bmiHeader.biYPelsPerMeter = 0;
11         m_pBmpInfo->bmiHeader.biClrUsed = 0;
12         m_pBmpInfo->bmiHeader.biClrImportant = 0;