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/* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright 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 <epoxy/gl.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() override = 0;
/**
* Activates the drawing context of this window.
* \return A boolean success indicator.
*/
virtual GHOST_TSuccess activateDrawingContext() override = 0;
/**
* Release the drawing context of the calling thread.
* \return A boolean success indicator.
*/
virtual GHOST_TSuccess releaseDrawingContext() override = 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;
}
/**
* Get user data.
*/
void *getUserData()
{
return m_user_data;
}
/**
* Set user data (intended for the caller to use as needed).
*/
void setUserData(void *user_data)
{
m_user_data = user_data;
}
/**
* 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 frame-buffer associated with the OpenGL context
* \return The ID of an OpenGL frame-buffer object.
*/
virtual unsigned int getDefaultFramebuffer() override
{
return 0;
}
protected:
bool m_stereoVisual;
/** Caller specified, not for internal use. */
void *m_user_data = nullptr;
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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