在bmp上添加字符2

void CTextOnbmpDlg::OnButton2()

{

 // TODO: Add your control notification handler code here

 FILE *fp=fopen("d:\\temp\\pic16001200\\000.bmp", "rb");

  if(fp == 0)

       return ;

  HDC hDC = ::GetDC(GetSafeHwnd());

     HDC hMemDC = CreateCompatibleDC(hDC);

  fseek(fp, sizeof(BITMAPFILEHEADER), 0);

  BITMAPINFOHEADER head;

  fread(&head, sizeof(BITMAPINFOHEADER), 1, fp);

  int bmpHeight = head.biHeight;

  int bmpWidth = head.biWidth;

  int biBitCount = head.biBitCount;

  int lineByte = (bmpWidth*biBitCount/8+3)/4*4;

  RGBQUAD *pColorTable;

  if(biBitCount == 8)

   {

       pColorTable = new RGBQUAD[256];

       fread(pColorTable, sizeof(RGBQUAD), 256, fp);

   }

  unsigned char *pBmpBuf = new unsigned char[lineByte*bmpHeight];

  fread(pBmpBuf, 1, lineByte*bmpHeight, fp);

  

   CDC *m_pMemDC;

  m_pMemDC = new CDC();

  CDC *pDC;

  pDC = GetDC();

  m_pMemDC->CreateCompatibleDC(pDC);

  CBitmap *m_pOldBmp = NULL;

  CBitmap *m_pMemBmp = new CBitmap();       //根据图片的大小创建一个兼容位图

  m_pMemBmp->CreateCompatibleBitmap(pDC, bmpWidth, bmpHeight);

  m_pOldBmp = m_pMemDC->SelectObject(m_pMemBmp);

  

   // 把图像的数据绘制到兼容位图上

   

   SetDIBits(m_pMemDC->GetSafeHdc(), (HBITMAP)m_pMemBmp->m_hObject,

       0, bmpHeight, (LPVOID)pBmpBuf, (BITMAPINFO*)&head, DIB_RGB_COLORS);

  m_pMemDC->SetBkMode(TRANSPARENT);

  m_pMemDC->SetTextColor(RGB(255, 0, 0));

 

   //设置字体

   CFont font;

  font.CreateFont(10,10,0,0,10,FALSE,FALSE,FALSE,ANSI_CHARSET,OUT_DEFAULT_PRECIS,OUT_DEFAULT_PRECIS,DEFAULT_QUALITY,FF_SWISS,"宋体");

  SelectObject(hMemDC, font);

  // 添加文字到指定位置

   m_pMemDC->TextOut(100, 100, "hello");

  

   unsigned char *pTemp = new unsigned char[lineByte*bmpHeight];

  GetDIBits(m_pMemDC->GetSafeHdc(), (HBITMAP)m_pMemBmp->m_hObject, 0, bmpHeight,

       (LPVOID)pTemp, (BITMAPINFO*)&head, DIB_RGB_COLORS);

  fclose(fp);

  

   char bmpwrite[] = "test2.bmp";

  fp = fopen(bmpwrite,"wb");

  BITMAPFILEHEADER fileHead;

  fileHead.bfType = 0x4D42;

  fileHead.bfSize = sizeof(BITMAPFILEHEADER)+sizeof(BITMAPINFOHEADER)+lineByte*bmpHeight;

  fileHead.bfReserved1 = 0;

  fileHead.bfReserved2 = 0;

  fileHead.bfOffBits = 54;

  fwrite(&fileHead, sizeof(BITMAPFILEHEADER), 1, fp);

  

   fwrite(&head, sizeof(BITMAPINFOHEADER), 1, fp);

  fwrite(pTemp, lineByte*bmpHeight, 1, fp);

  fclose(fp);

  

   delete m_pMemBmp;

  delete m_pMemDC;

  delete[] pBmpBuf;

 delete[] pTemp;

 MessageBox("VOER!");

}