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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.
- */
-
- // -=- DeviceFrameBuffer.h
- //
- // The DeviceFrameBuffer class encapsulates the pixel data of a supplied
- // Device Context Handle (HDC)
-
- // *** THIS INTERFACE NEEDS TIDYING TO SEPARATE COORDINATE SYSTEMS BETTER ***
-
- #ifndef __RFB_WIN32_DEVICE_FRAME_BUFFER_H__
- #define __RFB_WIN32_DEVICE_FRAME_BUFFER_H__
-
- #include <windows.h>
- #include <rfb_win32/DIBSectionBuffer.h>
- #include <rfb/Cursor.h>
- #include <rfb/Region.h>
- #include <rfb/Exception.h>
- #include <rfb/Configuration.h>
-
- namespace rfb {
-
- class VNCServer;
-
- namespace win32 {
-
- // -=- DeviceFrameBuffer interface
-
- // DeviceFrameBuffer is passed an HDC referring to a window or to
- // the entire display. It may also be passed a rectangle specifying
- // the Device-relative coordinates of the actual rectangle to treat
- // as the desktop.
-
- // Coordinate systems start getting really annoying here. There are
- // three different "origins" to which coordinates might be relative:
- //
- // Desktop - VNC coordinates, top-left always (0,0)
- // Device - DC coordinates. Top-left *usually (0,0) but could be other.
- // Window - coordinates relative to the specified sub-rectangle within
- // the supplied DC.
- // Screen - Coordinates relative to the entire Windows virtual screen.
- // The virtual screen includes all monitors that are part of
- // the Windows desktop.
-
- // The data member is made to point to an internal mirror of the
- // current display data. Individual rectangles or regions of the
- // buffer can be brought up to date by calling the grab functions.
-
- class DeviceFrameBuffer : public DIBSectionBuffer {
- public:
- DeviceFrameBuffer(HDC deviceContext, const Rect& area_=Rect());
- virtual ~DeviceFrameBuffer();
-
- // - FrameBuffer overrides
-
- virtual void grabRect(const Rect &rect);
- virtual void grabRegion(const Region ®ion);
-
- // - DIBSectionBuffer overrides
-
- virtual void setPF(const PixelFormat& pf);
- virtual void setSize(int w, int h);
-
- // - DeviceFrameBuffer specific methods
-
- void setCursor(HCURSOR c, VNCServer* server);
-
- // Set whether grabRect should ignore errors or throw exceptions
- // Only set this if you are sure you'll capture the errors some other way!
- void setIgnoreGrabErrors(bool ie) {ignoreGrabErrors=ie;}
-
- static BoolParameter useCaptureBlt;
-
- protected:
- // Translate supplied Desktop coordinates into Device-relative coordinates
- // This translation may have been affected at start-time by the supplied sub-rect.
- Point desktopToDevice(const Point p) const {return p.translate(deviceCoords.tl);}
-
- HDC device;
- Rect deviceCoords;
- bool ignoreGrabErrors;
- };
-
- };
-
- };
-
- #endif // __RFB_WIN32_DEVICE_FRAME_BUFFER_H__
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