text: /*
  **  ClanLib SDK
  **  Copyright (c) 1997-2016 The ClanLib Team
  **
  **  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.
  **
  **  Note: Some of the libraries ClanLib may link to may have additional
  **  requirements or restrictions.
  **
  **  File Author(s):
  **
  **    Mark Page
  */
  
  #pragma once
  
  #include "graphic_context_state.h"
  
  namespace clan
  {
  	class GraphicContextProvider;
  
  	class GraphicScreen
  	{
  	public:
  		GraphicScreen(GraphicContextProvider *provider);
  		~GraphicScreen();
  		GraphicContextProvider *get_provider() { return provider; }
  		int get_max_attributes() const { return max_attributes; }
  
  		void set_active(GraphicContext_State *state);
  		void state_destroyed(GraphicContext_State *state);
  
  		void on_rasterizer_state_changed(GraphicContext_State *state);
  		void on_blend_state_changed(GraphicContext_State *state);
  		void on_depth_stencil_state_changed(GraphicContext_State *state);
  
  		void on_texture_changed(GraphicContext_State *state, int unit_index);
  		void on_textures_changed(GraphicContext_State *state);
  		void on_image_texture_changed(GraphicContext_State *state, int unit_index);
  		void on_image_textures_changed(GraphicContext_State *state);
  		void on_uniform_buffer_changed(GraphicContext_State *state, int index);
  		void on_storage_buffer_changed(GraphicContext_State *state, int index);
  		void on_scissor_changed(GraphicContext_State *state);
  		void on_viewport_changed(GraphicContext_State *state);
  		void on_depth_range_changed(GraphicContext_State *state, int viewport);
  		void on_framebuffer_changed(GraphicContext_State *state);
  		void on_program_changed(GraphicContext_State *state);
  		void on_draw_buffer_changed(GraphicContext_State *state);
  
  
  	private:
  		void set_default_state();
  		void set_active_pen(GraphicContext_State *state);
  		void set_active_buffer_control(GraphicContext_State *state);
  		void set_active_polygon_rasterizer(GraphicContext_State *state);
  		void set_active_frame_buffer(GraphicContext_State *state);
  		void set_active_textures(GraphicContext_State *state);
  		void set_active_image_textures(GraphicContext_State *state);
  		void set_active_uniform_buffers(GraphicContext_State *state);
  		void set_active_storage_buffers(GraphicContext_State *state);
  		void set_active_scissor(GraphicContext_State *state);
  		void set_active_viewport(GraphicContext_State *state);
  		void set_active_program(GraphicContext_State *state);
  		void set_active_standard_shader(GraphicContext_State *state);
  		void set_active_depth_range(GraphicContext_State *state);
  
  		int max_attributes;
  		GraphicContextProvider *provider;
  		GraphicContext_State *current;
  		GraphicContext_State active_state;
  	};
  }
  