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/* Copyright (C) 2002-2005 RealVNC Ltd. All Rights Reserved.
*
* This is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this software; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
* USA.
*/
// DeviceContext base class, wrapping Windows HDC, plus some
// helper classes tailored to particular types of DC, such as
// window and device DCs.
#ifndef __RFB_WIN32_DEVICECONTEXT_H__
#define __RFB_WIN32_DEVICECONTEXT_H__
#include <windows.h>
#include <rfb/PixelFormat.h>
#include <rfb/Rect.h>
#include <rfb_win32/TCharArray.h>
namespace rfb {
namespace win32 {
// Base class, providing methods to get the bounding (clip) box,
// and the pixel format, and access to the HDC itself.
class DeviceContext {
public:
DeviceContext() : dc(0) {}
virtual ~DeviceContext() {}
operator HDC() const {return dc;}
PixelFormat getPF() const;
static PixelFormat getPF(HDC dc);
Rect getClipBox() const;
static Rect getClipBox(HDC dc);
protected:
HDC dc;
};
// -=- DeviceContext that opens a specific display device
class DeviceDC : public DeviceContext {
public:
DeviceDC(const TCHAR* deviceName);
~DeviceDC();
};
// Get a DC for a particular window's client area.
class WindowDC : public DeviceContext {
public:
WindowDC(HWND wnd);
virtual ~WindowDC();
protected:
HWND hwnd;
};
// Create a new DC, compatible with an existing one.
class CompatibleDC : public DeviceContext {
public:
CompatibleDC(HDC existing);
virtual ~CompatibleDC();
};
// Create a new DC, compatible with an existing one, and
// select the specified bitmap into it.
class BitmapDC : public CompatibleDC {
public:
BitmapDC(HDC hdc, HBITMAP hbitmap);
~BitmapDC();
protected:
HBITMAP oldBitmap;
};
};
};
#endif
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