text: /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
  //
  // TGUI - Texus' Graphical User Interface
  // Copyright (C) 2012-2021 Bruno Van de Velde (vdv_b@tgui.eu)
  //
  // This software is provided 'as-is', without any express or implied warranty.
  // In no event will the authors be held liable for any damages arising from the use of this software.
  //
  // Permission is granted to anyone to use this software for any purpose,
  // including commercial applications, and to alter it and redistribute it freely,
  // subject to the following restrictions:
  //
  // 1. The origin of this software must not be misrepresented;
  //    you must not claim that you wrote the original software.
  //    If you use this software in a product, an acknowledgment
  //    in the product documentation would be appreciated but is not required.
  //
  // 2. Altered source versions must be plainly marked as such,
  //    and must not be misrepresented as being the original software.
  //
  // 3. This notice may not be removed or altered from any source distribution.
  //
  /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
  
  
  #include <TGUI/Backend/SDL-TTF-GLES2.hpp>
  
  #include <SDL.h>
  
  /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
  
  namespace tgui
  {
      inline namespace SDL_TTF_GLES2
      {
          void Gui::setWindow(SDL_Window* window)
          {
              if (!isBackendSet())
              {
                  auto backend = std::make_shared<BackendSDL>();
                  backend->setFontBackend(std::make_shared<BackendFontFactoryImpl<BackendFontSDLttf>>());
                  backend->setRenderer(std::make_shared<BackendRendererGLES2>(SDL_GL_GetProcAddress));
                  backend->setDestroyOnLastGuiDetatch(true);
                  setBackend(backend);
              }
  
              m_backendRenderTarget = std::make_shared<BackendRenderTargetGLES2>();
  
              setGuiWindow(window);
          }
  
          /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
  
          void Gui::presentScreen()
          {
              SDL_GL_SwapWindow(m_window);
          }
      }
  
      /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
  }
  
  /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
  