magnum/src/Platform/WindowlessGlxApplication.h

#ifndef Magnum_Platform_WindowlessGlxApplication_h
#define Magnum_Platform_WindowlessGlxApplication_h
/*
    This file is part of Magnum.

    Copyright © 2010, 2011, 2012, 2013 Vladimír Vondruš <mosra@centrum.cz>

    Permission is hereby granted, free of charge, to any person obtaining a
    copy of this software and associated documentation files (the "Software"),
    to deal in the Software without restriction, including without limitation
    the rights to use, copy, modify, merge, publish, distribute, sublicense,
    and/or sell copies of the Software, and to permit persons to whom the
    Software is furnished to do so, subject to the following conditions:

    The above copyright notice and this permission notice shall be included
    in all copies or substantial portions of the Software.

    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
    THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
    FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
    DEALINGS IN THE SOFTWARE.
*/

/** @file
 * @brief Class Magnum::Platform::WindowlessGlxApplication
 */

#include "OpenGL.h"
#include <GL/glx.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
/* undef Xlib nonsense to avoid conflicts */
#undef Complex
#undef None
#undef Always

#include "Magnum.h"
#include "Platform/AbstractContextHandler.h"

namespace Magnum { namespace Platform {

/**
@brief Windowless GLX application

@section WindowlessGlxApplication-usage Usage

Place your code into exec(). The subclass can be then used directly in
`main()` -- see convenience macro MAGNUM_WINDOWLESSGLXAPPLICATION_MAIN().
@code
class MyApplication: public Magnum::Platform::WindowlessGlxApplication {
    // implement required methods...
};
MAGNUM_WINDOWLESSGLXAPPLICATION_MAIN(MyApplication)
@endcode
*/
class WindowlessGlxApplication {
    public:
        /**
         * @brief Constructor
         * @param argc      Count of arguments of `main()` function
         * @param argv      Arguments of `main()` function
         *
         * Creates window with double-buffered OpenGL 3.2 core context or
         * OpenGL ES 2.0 context, if targetting OpenGL ES.
         */
        explicit WindowlessGlxApplication(int& argc, char** argv);

        ~WindowlessGlxApplication();

        /**
         * @brief Execute application
         * @return Value for returning from `main()`.
         */
        virtual int exec() = 0;

    private:
        Display* display;
        GLXContext context;
        GLXPbuffer pbuffer;

        Context* c;
};

/** @hideinitializer
@brief Entry point for windowless GLX application
@param className Class name

Can be used as equivalent to the following code to achieve better portability,
see @ref portability-applications for more information.
@code
int main(int argc, char** argv) {
    className app(argc, argv);
    return app.exec();
}
@endcode
When no other application header is included this macro is also aliased to
`MAGNUM_APPLICATION_MAIN()`.
*/
#define MAGNUM_WINDOWLESSGLXAPPLICATION_MAIN(className)                     \
    int main(int argc, char** argv) {                                       \
        className app(argc, argv);                                          \
        return app.exec();                                                  \
    }

#ifndef DOXYGEN_GENERATING_OUTPUT
#ifndef MAGNUM_APPLICATION_MAIN
#define MAGNUM_APPLICATION_MAIN(className) MAGNUM_WINDOWLESSGLXAPPLICATION_MAIN(className)
#else
#undef MAGNUM_APPLICATION_MAIN
#endif
#endif

}}

#endif