text: // +----------------------------------------------------------------------
  // | Project : ray.
  // | All rights reserved.
  // +----------------------------------------------------------------------
  // | Copyright (c) 2013-2017.
  // +----------------------------------------------------------------------
  // | * Redistribution and use of this software in source and binary forms,
  // |   with or without modification, are permitted provided that the following
  // |   conditions are met:
  // |
  // | * Redistributions of source code must retain the above
  // |   copyright notice, this list of conditions and the
  // |   following disclaimer.
  // |
  // | * Redistributions in binary form must reproduce the above
  // |   copyright notice, this list of conditions and the
  // |   following disclaimer in the documentation and/or other
  // |   materials provided with the distribution.
  // |
  // | * Neither the name of the ray team, nor the names of its
  // |   contributors may be used to endorse or promote products
  // |   derived from this software without specific prior
  // |   written permission of the ray team.
  // |
  // | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  // | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  // | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  // | A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  // | OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  // | SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  // | LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  // | DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  // | THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  // | (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  // | OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  // +----------------------------------------------------------------------
  #ifndef _H_X11_CORE_SWAPCHAIN_H_
  #define _H_X11_CORE_SWAPCHAIN_H_
  
  #include "ogl_types.h"
  
  _NAME_BEGIN
  
  class XGLSwapchain : public GraphicsSwapchain
  {
  	__DeclareSubClass(XGLSwapchain, GraphicsSwapchain)
  public:
  	XGLSwapchain() noexcept;
  	virtual ~XGLSwapchain() noexcept;
  
  	bool setup(const GraphicsSwapchainDesc& swapchainDesc) noexcept;
  	void close() noexcept;
  
  	void setActive(bool active) noexcept;
  	bool getActive() noexcept;
  
  	void setWindowResolution(std::uint32_t w, std::uint32_t h) noexcept;
  	void getWindowResolution(std::uint32_t& w, std::uint32_t& h) const noexcept;
  
  	void setSwapInterval(GraphicsSwapInterval interval) noexcept;
  	GraphicsSwapInterval getSwapInterval() const noexcept;
  
  	void present() noexcept;
  
  	const GraphicsSwapchainDesc& getGraphicsSwapchainDesc() const noexcept;
  
  private:
  	static void initPixelFormat() noexcept;
  
  private:
  	friend class OGLDevice;
  	void setDevice(const GraphicsDevicePtr& device) noexcept;
  	GraphicsDevicePtr getDevice() noexcept;
  
  private:
  	XGLSwapchain(const XGLSwapchain&) noexcept = delete;
  	XGLSwapchain& operator=(const XGLSwapchain&) noexcept = delete;
  
  private:
  	bool _isActive;
  
  	Window _window;
  	Display* _display;
  
  	GLXContext _glc;
  	GLXFBConfig* _cfg;
  
  	GraphicsSwapchainDesc _swapchainDesc;
  	GraphicsDeviceWeakPtr _device;
  
  	static XGLSwapchain* _swapchain;
  };
  
  _NAME_END
  
  #endif