gunslinger/include/base/gs_engine.h

#ifndef __GS_ENGINE_H__
#define __GS_ENGINE_H__

/*═█═════════════════════════════════════════════════════════════════════════════════════█═╗
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╚██	██║   ██║██║   ██║██║╚██╗██║╚════██║██║     ██║██║╚██╗██║██║   ██║██╔══╝  ██╔══██╗ ███ █╝█
█║█	╚██████╔╝╚██████╔╝██║ ╚████║███████║███████╗██║██║ ╚████║╚██████╔╝███████╗██║  ██║ ██═████
████ ╚═════╝  ╚═════╝ ╚═╝  ╚═══╝╚══════╝╚══════╝╚═╝╚═╝  ╚═══╝ ╚═════╝ ╚══════╝╚═╝  ╚═╝ █═█═██
╚═██════════════════════════════════════════════════════════════════════════════════════██═╝*/

#ifdef __cplusplus
extern "C" {
#endif

#include "common/gs_types.h"

// Forward Decl
struct gs_platform_i;
struct gs_graphics_i;
struct gs_audio_i;

typedef struct gs_application_desc
{
	gs_result ( * init )();
	gs_result ( * update )();
	gs_result ( * shutdown )();
	const char* window_title;
	u32 window_width;
	u32 window_height;
	u32 window_flags;
	f32 frame_rate;
	b32 enable_vsync;
} gs_application_desc;

// What would the context necessarily hold? Some container of all subsystems? 
typedef struct
{
	struct gs_platform_i* 			platform;		// Main platform interface
	struct gs_graphics_i* 			graphics;
	struct gs_audio_i* 				audio;
	gs_application_desc 			app;
} gs_engine_context;

// This could be kept in an implementation file and just provide an interface to the user
typedef struct 
{
	gs_engine_context ctx;
	gs_result ( * run )();
	gs_result ( * shutdown )();
} gs_engine;

gs_engine* gs_engine_construct( gs_application_desc app_desc );
gs_engine* gs_engine_instance();

#ifdef __cplusplus
}
#endif 	// c++

#endif // __GS_ENGINE_H__