godot/drivers/opengl/rasterizer_opengl.h

/*************************************************************************/
/*  rasterizer_opengl.h                                                  */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
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/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md).   */
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#ifndef RASTERIZER_OPENGL_H
#define RASTERIZER_OPENGL_H

#include "drivers/opengl/rasterizer_platforms.h"
#ifdef OPENGL_BACKEND_ENABLED

#include "rasterizer_canvas_opengl.h"
#include "rasterizer_scene_opengl.h"
#include "rasterizer_storage_opengl.h"
#include "servers/rendering/renderer_compositor.h"

class RasterizerOpenGL : public RendererCompositor {
private:
	uint64_t frame = 1;
	float delta = 0;

	double time_total = 0.0;
	double time_scale = 1.0;

protected:
	RasterizerCanvasOpenGL canvas;
	RasterizerStorageOpenGL storage;
	RasterizerSceneOpenGL scene;

	void _blit_render_target_to_screen(RID p_render_target, const Rect2 &p_screen_rect);

public:
	RendererStorage *get_storage() { return &storage; }
	RendererCanvasRender *get_canvas() { return &canvas; }
	RendererSceneRender *get_scene() { return &scene; }

	void set_boot_image(const Ref<Image> &p_image, const Color &p_color, bool p_scale, bool p_use_filter = true);

	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() {}

	static RendererCompositor *_create_current() {
		return memnew(RasterizerOpenGL);
	}

	static void make_current() {
		_create_func = _create_current;
	}

	virtual bool is_low_end() const { return true; }
	uint64_t get_frame_number() const { return frame; }
	double get_frame_delta_time() const { return delta; }

	RasterizerOpenGL();
	~RasterizerOpenGL() {}
};

#endif // OPENGL_BACKEND_ENABLED

#endif