/*
* 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