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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
* \ingroup GHOST
* Declaration of GHOST_Context class.
*/
#pragma once
#include "GHOST_IContext.h"
#include "GHOST_Types.h"
#include "glew-mx.h"
#include <cstdlib> // for NULL
class GHOST_Context : public GHOST_IContext {
public:
/**
* Constructor.
* \param stereoVisual Stereo visual for quad buffered stereo.
*/
GHOST_Context(bool stereoVisual) : m_stereoVisual(stereoVisual)
{
}
/**
* Destructor.
*/
virtual ~GHOST_Context()
{
}
/**
* 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;
/**
* Release the drawing context of the calling thread.
* \return A boolean success indicator.
*/
virtual GHOST_TSuccess releaseDrawingContext() = 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;
}
/**
* Returns if the context is rendered upside down compared to OpenGL.
*/
virtual inline bool isUpsideDown() const
{
return false;
}
/**
* Gets the OpenGL framebuffer associated with the OpenGL context
* \return The ID of an OpenGL framebuffer object.
*/
virtual unsigned int getDefaultFramebuffer()
{
return 0;
}
protected:
void initContextGLEW();
bool m_stereoVisual;
static void initClearGL();
#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);
bool win32_silent_chk(bool result);
# ifndef NDEBUG
# define WIN32_CHK(x) win32_chk((x), __FILE__, __LINE__, # x)
# else
# define WIN32_CHK(x) win32_chk(x)
# endif
# define WIN32_CHK_SILENT(x, silent) ((silent) ? win32_silent_chk(x) : WIN32_CHK(x))
#endif /* _WIN32 */
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