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/*
* This program 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 program 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 program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* The Original Code is Copyright (C) 2013 Blender Foundation.
* All rights reserved.
*/
/** \file ghost/intern/GHOST_Context.h
* \ingroup GHOST
* Declaration of GHOST_Context class.
*/
#ifndef __GHOST_CONTEXT_H__
#define __GHOST_CONTEXT_H__
#include "GHOST_Types.h"
#include "glew-mx.h"
#include <cstdlib> // for NULL
class GHOST_Context
{
public:
/**
* Constructor.
* \param stereoVisual Stereo visual for quad buffered stereo.
* \param numOfAASamples Number of samples used for AA (zero if no AA)
*/
GHOST_Context(bool stereoVisual, GHOST_TUns16 numOfAASamples)
: m_stereoVisual(stereoVisual),
m_numOfAASamples(numOfAASamples),
m_mxContext(NULL)
{}
/**
* Destructor.
*/
virtual ~GHOST_Context() {
mxDestroyContext(m_mxContext);
}
/**
* Swaps front and back buffers of a window.
* \return A boolean success indicator.
*/
virtual GHOST_TSuccess swapBuffers() = 0;
/**
* Activates the drawing context of this window.
* \return A boolean success indicator.
*/
virtual GHOST_TSuccess activateDrawingContext() = 0;
/**
* Call immediately after new to initialize. If this fails then immediately delete the object.
* \return Indication as to whether initialization has succeeded.
*/
virtual GHOST_TSuccess initializeDrawingContext() = 0;
/**
* Updates the drawing context of this window. Needed
* whenever the window is changed.
* \return Indication of success.
*/
virtual GHOST_TSuccess updateDrawingContext() {
return GHOST_kFailure;
}
/**
* Checks if it is OK for a remove the native display
* \return Indication as to whether removal has succeeded.
*/
virtual GHOST_TSuccess releaseNativeHandles() = 0;
/**
* Sets the swap interval for swapBuffers.
* \param interval The swap interval to use.
* \return A boolean success indicator.
*/
virtual GHOST_TSuccess setSwapInterval(int /*interval*/) {
return GHOST_kFailure;
}
/**
* Gets the current swap interval for swapBuffers.
* \param intervalOut Variable to store the swap interval if it can be read.
* \return Whether the swap interval can be read.
*/
virtual GHOST_TSuccess getSwapInterval(int&) {
return GHOST_kFailure;
}
/**
* Stereo visual created. Only necessary for 'real' stereo support,
* ie quad buffered stereo. This is not always possible, depends on
* the graphics h/w
*/
inline bool isStereoVisual() const {
return m_stereoVisual;
}
/** Number of samples used in anti-aliasing, set to 0 if no AA **/
inline GHOST_TUns16 getNumOfAASamples() const {
return m_numOfAASamples;
}
protected:
void initContextGLEW();
inline void activateGLEW() const {
mxMakeCurrentContext(m_mxContext);
}
bool m_stereoVisual;
GHOST_TUns16 m_numOfAASamples;
static void initClearGL();
private:
MXContext *m_mxContext;
#ifdef WITH_CXX_GUARDEDALLOC
MEM_CXX_CLASS_ALLOC_FUNCS("GHOST:GHOST_Context")
#endif
};
#ifdef _WIN32
bool win32_chk(bool result, const char *file = NULL, int line = 0, const char *text = NULL);
# ifndef NDEBUG
# define WIN32_CHK(x) win32_chk((x), __FILE__, __LINE__, #x)
# else
# define WIN32_CHK(x) win32_chk(x)
# endif
#endif /* _WIN32 */
#endif // __GHOST_CONTEXT_H__
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