MFC中CBitmap的簡單複制方法 (Copy CBitmap)

在這裡為大家提供一種CBitmap複制的方法

經過自己的一層封裝,就形成的非常好用的CBitmap的複制工具函數

先看函數實作:

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1. HBITMAP CMyDialog:: CopyBitmap (HBITMAP hSourceHbitmap )
2. {
3.         CDC sourceDC;
4.         CDC destDC;
5.         sourceDC. CreateCompatibleDC ( NULL );
6.         destDC. CreateCompatibleDC ( NULL );
7.         //The bitmap information.
8.         BITMAP bm = { 0 };
9.         //Get the bitmap information.
10.         :: GetObject (hSourceHbitmap, sizeof (bm ), &bm );
11.         // Create a bitmap to hold the result
12.         HBITMAP hbmResult = :: CreateCompatibleBitmap (CClientDC ( NULL ), bm. bmWidth, bm. bmHeight );
13.         HBITMAP hbmOldSource = (HBITMAP ):: SelectObject (sourceDC. m_hDC, hSourceHbitmap );
14.         HBITMAP hbmOldDest = (HBITMAP ):: SelectObject (destDC. m_hDC, hbmResult );
15.         destDC. BitBlt ( 0, 0, bm. bmWidth, bm. bmHeight, &sourceDC, 0, 0, SRCCOPY );
16.         // Restore DCs
17.         :: SelectObject (sourceDC. m_hDC, hbmOldSource );
18.         :: SelectObject (destDC. m_hDC, hbmOldDest );
19.         :: DeleteObject (sourceDC. m_hDC );
20.         :: DeleteObject (destDC. m_hDC );
21.         return hbmResult;
22. }

接下來函數調用:

1. //這樣簡單的操作就可以實作CBitmap的複制
2. CBitmap CpyBitmap;
3. //傳回值可以檢測是否圖檔拷貝成功
4. CpyBitmap->Attach (CopyBitmap (SrcBitmap ) );