/* === S Y N F I G ========================================================= */
/*! \file synfig/rendering/opengl/internal/context.h
** \brief Context Header
**
** $Id$
**
** \legal
** ......... ... 2015 Ivan Mahonin
**
** This package 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 package 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.
** \endlegal
*/
/* ========================================================================= */
/* === S T A R T =========================================================== */
#ifndef __SYNFIG_RENDERING_GL_CONTEXT_H
#define __SYNFIG_RENDERING_GL_CONTEXT_H
/* === H E A D E R S ======================================================= */
#include <cassert>
#include <vector>
#include <utility>
#include <mutex>
#include <GL/gl.h>
#include <GL/glx.h>
#include <synfig/string.h>
/* === M A C R O S ========================================================= */
/* === T Y P E D E F S ===================================================== */
/* === C L A S S E S & S T R U C T S ======================================= */
namespace synfig
{
namespace rendering
{
namespace gl
{
class Context
{
public:
class Lock {
private:
Context &context;
public:
Lock(Context &context): context(context) { context.use(); }
Lock(Lock &other): context(other.context) { context.use(); }
~Lock() { context.unuse(); }
Context& get() const { return context; }
Context* operator-> () const { return &get(); }
};
struct ContextInfo {
Display *display;
GLXDrawable drawable;
GLXDrawable read_drawable;
GLXContext context;
ContextInfo():
display(NULL),
drawable(None),
read_drawable(None),
context(NULL) { }
bool operator== (const ContextInfo &other) const
{
return display == other.display
&& drawable == other.drawable
&& read_drawable == other.read_drawable
&& context == other.context;
}
bool operator!= (const ContextInfo &other) const
{
return !(*this == other);
}
void make_current() const;
static ContextInfo get_current(Display *default_display);
};
private:
std::recursive_mutex rec_mutex;
Display *display;
GLXFBConfig config;
GLXPbuffer pbuffer;
GLXContext context;
ContextInfo context_info;
std::vector<ContextInfo> context_stack;
static std::pair<GLenum, const char*> enum_strings[];
public:
Context();
~Context();
bool is_valid() const { return context; }
bool is_current() const;
void use();
void unuse();
void check(const char *s = "");
const char* get_enum_string(GLenum x);
};
}; /* end namespace gl */
}; /* end namespace rendering */
}; /* end namespace synfig */
/* -- E N D ----------------------------------------------------------------- */
#endif