| /* |
| * Copyright (C) 2012 Google Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
| * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #ifndef HWndDC_h |
| #define HWndDC_h |
| |
| #include <windows.h> |
| #include "wtf/NonCopyable.h" |
| |
| namespace WebCore { |
| |
| class HWndDC { |
| WTF_MAKE_NONCOPYABLE(HWndDC); |
| public: |
| HWndDC() |
| : m_hwnd(0) |
| , m_hdc(0) |
| { |
| } |
| |
| explicit HWndDC(HWND hwnd) |
| : m_hwnd(hwnd) |
| , m_hdc(::GetDC(hwnd)) |
| { |
| } |
| |
| HWndDC(HWND hwnd, HRGN hrgnClip, DWORD flags) |
| : m_hwnd(hwnd) |
| , m_hdc(::GetDCEx(hwnd, hrgnClip, flags)) |
| { |
| } |
| |
| ~HWndDC() |
| { |
| clear(); |
| } |
| |
| HDC setHWnd(HWND hwnd) |
| { |
| clear(); |
| m_hwnd = hwnd; |
| m_hdc = ::GetDC(hwnd); |
| return m_hdc; |
| } |
| |
| void clear() |
| { |
| if (!m_hdc) |
| return; |
| ::ReleaseDC(m_hwnd, m_hdc); |
| m_hwnd = 0; |
| m_hdc = 0; |
| } |
| |
| operator HDC() |
| { |
| return m_hdc; |
| } |
| |
| private: |
| HWND m_hwnd; |
| HDC m_hdc; |
| }; |
| |
| } // namespace WebCore |
| |
| #endif // HWndDC_h |