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/*******************************************************************************
* disp.h
*
* Written by Christoph Hormann <chris_hormann@gmx.de>
*
* Abstract base class for Unix systems render preview displays
* Based on Windows pvdisplay.h.
*
* ---------------------------------------------------------------------------
* Persistence of Vision Ray Tracer ('POV-Ray') version 3.7.
* Copyright 1991-2013 Persistence of Vision Raytracer Pty. Ltd.
*
* POV-Ray is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* POV-Ray 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
* ---------------------------------------------------------------------------
* POV-Ray is based on the popular DKB raytracer version 2.12.
* DKBTrace was originally written by David K. Buck.
* DKBTrace Ver 2.0-2.12 were written by David K. Buck & Aaron A. Collins.
* ---------------------------------------------------------------------------
* $File: //depot/povray/smp/unix/disp.h $
* $Revision: #11 $
* $Change: 6132 $
* $DateTime: 2013/11/25 14:23:41 $
* $Author: clipka $
*******************************************************************************/
#ifndef _DISP_H
#define _DISP_H
#include "vfe.h"
#include <boost/shared_ptr.hpp>
namespace pov_frontend
{
using namespace vfe;
extern shared_ptr<Display> gDisplay;
class UnixDisplay : public vfeDisplay
{
public:
UnixDisplay(unsigned int w, unsigned int h, GammaCurvePtr gamma, vfeSession *session, bool visible) :
vfeDisplay(w, h, gamma, session, visible) {};
virtual ~UnixDisplay() {} ;
virtual void Initialise() = 0;
virtual void Close() = 0;
virtual void Show() = 0;
virtual void Hide() = 0;
virtual bool TakeOver(UnixDisplay *display) = 0;
/**
To read all pending events in an interfactive display system
and interpret them.
@returns true if an abort request has been made, false otherwise
*/
virtual bool HandleEvents() = 0;
/**
Called regularly by the main event loop.
@param Force Indicates the Update should be immediate
otherwise the display does not actually have to be updated
during every call.
*/
virtual void UpdateScreen(bool Force = false) = 0;
/**
The following methods are sequentially called when pausing after
a frame has been rendered, e.g. waiting for a keypress to continue.
The first can be used to print a message that the display will wait
for user input. The second must poll (with no wait) for user input
and returns whether the pause is to be resumed; the method is called
within a loop by the main thread. The last method allows to notify
that the pause is finished.
*/
virtual void PauseWhenDoneNotifyStart() = 0;
virtual bool PauseWhenDoneResumeIsRequested() = 0;
virtual void PauseWhenDoneNotifyEnd() = 0;
};
inline UnixDisplay *GetRenderWindow (void)
{
Display *p = gDisplay.get();
if (p == NULL)
return NULL;
return dynamic_cast<UnixDisplay *>(p) ;
}
}
#endif
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