text: /*************************************************************************/
  /*  rasterizer_rd.h                                                      */
  /*************************************************************************/
  /*                       This file is part of:                           */
  /*                           GODOT ENGINE                                */
  /*                      https://godotengine.org                          */
  /*************************************************************************/
  /* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur.                 */
  /* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md).   */
  /*                                                                       */
  /* 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  */
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  /*************************************************************************/
  
  #ifndef RASTERIZER_RD_H
  #define RASTERIZER_RD_H
  
  #include "core/os/os.h"
  #include "core/thread_work_pool.h"
  #include "servers/rendering/rasterizer.h"
  #include "servers/rendering/rasterizer_rd/rasterizer_canvas_rd.h"
  #include "servers/rendering/rasterizer_rd/rasterizer_scene_high_end_rd.h"
  #include "servers/rendering/rasterizer_rd/rasterizer_storage_rd.h"
  
  class RasterizerRD : public Rasterizer {
  protected:
  	RasterizerCanvasRD *canvas;
  	RasterizerStorageRD *storage;
  	RasterizerSceneHighEndRD *scene;
  
  	RID copy_viewports_rd_shader;
  	RID copy_viewports_rd_pipeline;
  	RID copy_viewports_rd_index_buffer;
  	RID copy_viewports_rd_array;
  	RID copy_viewports_sampler;
  
  	Map<RID, RID> render_target_descriptors;
  
  	double time;
  	float delta;
  
  	static uint64_t frame;
  
  public:
  	RasterizerStorage *get_storage() { return storage; }
  	RasterizerCanvas *get_canvas() { return canvas; }
  	RasterizerScene *get_scene() { return scene; }
  
  	void set_boot_image(const Ref<Image> &p_image, const Color &p_color, bool p_scale, bool p_use_filter) {}
  
  	void initialize();
  	void begin_frame(double frame_step);
  	void prepare_for_blitting_render_targets();
  	void blit_render_targets_to_screen(DisplayServer::WindowID p_screen, const BlitToScreen *p_render_targets, int p_amount);
  
  	void end_frame(bool p_swap_buffers);
  	void finalize();
  
  	_ALWAYS_INLINE_ uint64_t get_frame_number() const { return frame; }
  	_ALWAYS_INLINE_ float get_frame_delta_time() const { return delta; }
  	_ALWAYS_INLINE_ double get_total_time() const { return time; }
  
  	static Error is_viable() {
  		return OK;
  	}
  
  	static Rasterizer *_create_current() {
  		return memnew(RasterizerRD);
  	}
  
  	static void make_current() {
  		_create_func = _create_current;
  	}
  
  	virtual bool is_low_end() const { return false; }
  
  	static ThreadWorkPool thread_work_pool;
  
  	static RasterizerRD *singleton;
  	RasterizerRD();
  	~RasterizerRD() {}
  };
  #endif // RASTERIZER_RD_H
  