1 /*
2  * Copyright (c) 2009, Oracle and/or its affiliates. All rights reserved.
3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4  *
5  * This code is free software; you can redistribute it and/or modify it
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7  * published by the Free Software Foundation.  Oracle designates this
8  * particular file as subject to the "Classpath" exception as provided
9  * by Oracle in the LICENSE file that accompanied this code.
10  *
11  * This code is distributed in the hope that it will be useful, but WITHOUT
12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14  * version 2 for more details (a copy is included in the LICENSE file that
15  * accompanied this code).
16  *
17  * You should have received a copy of the GNU General Public License version
18  * 2 along with this work; if not, write to the Free Software Foundation,
19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20  *
21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22  * or visit www.oracle.com if you need additional information or have any
23  * questions.
24  */
25 
26 #ifndef _AWT_DCHolder_H
27 #define _AWT_DCHolder_H
28 
29 struct DCHolder
30 {
31     HDC m_hMemoryDC;
32     int m_iWidth;
33     int m_iHeight;
34     BOOL m_bForImage;
35     HBITMAP m_hBitmap;
36     HBITMAP m_hOldBitmap;
37     void *m_pPoints;
38 
39     DCHolder();
40     ~DCHolder();
41 
42     void Create(
43         HDC hRelDC,
44         int iWidth,
45         int iHeght,
46         BOOL bForImage);
47 
HDCDCHolder48     operator HDC()
49     {
50         if (NULL == m_hOldBitmap && NULL != m_hBitmap) {
51             m_hOldBitmap = (HBITMAP)::SelectObject(m_hMemoryDC, m_hBitmap);
52         }
53         return m_hMemoryDC;
54     }
55 
HBITMAPDCHolder56     operator HBITMAP()
57     {
58         if (NULL != m_hOldBitmap) {
59             m_hBitmap = (HBITMAP)::SelectObject(m_hMemoryDC, m_hOldBitmap);
60             m_hOldBitmap = NULL;
61         }
62         return m_hBitmap;
63     }
64 
65     static HBITMAP CreateJavaContextBitmap(
66         HDC hdc,
67         int iWidth,
68         int iHeight,
69         void **ppPoints);
70 };
71 
72 #endif //_AWT_DCHolder_H
73