2022-untitled-game/code/game/common.h

#pragma once

// System
#include <assert.h>
#include <float.h>
#include <math.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <time.h>

// 3rd Party
#include <glad/gl.h>
#include <SDL.h>

const char* WINDOW_TITLE = "Untitled Game";
const int TARGET_FRAME_TIME = 16;
const int WINDOW_WIDTH  = 1280;
const int WINDOW_HEIGHT = 960;
const int RENDER_WIDTH  = 320;
const int RENDER_HEIGHT = 240;
const size_t ENGINE_MEMORY_SIZE = 1U * 1024U * 1024U;
const size_t GAME_MEMORY_SIZE = 1U * 1024U * 1024U;
const size_t DATA1_MEMORY_SIZE = 8U * 1024U * 1024U;
const size_t DATA2_MEMORY_SIZE = 8U * 1024U * 1024U;
const size_t SCRATCH_MEMORY_SIZE  = 1U * 1024U * 1024U;

#ifdef BUILD_DEBUG
const size_t DEBUG_MEMORY_SIZE  = 1U * 1024U * 1024U;
#endif

const float VIEWPORT_WIDTH = (float)RENDER_WIDTH * WINDOW_HEIGHT / RENDER_HEIGHT;
const float VIEWPORT_HEIGHT = (float)RENDER_HEIGHT * WINDOW_HEIGHT / RENDER_HEIGHT;
const float VIEWPORT_X = WINDOW_WIDTH/2 - VIEWPORT_WIDTH/2;
const float VIEWPORT_Y = WINDOW_HEIGHT/2 - VIEWPORT_HEIGHT/2;

typedef struct input {
	bool forward; bool backward;
	bool strafe_left; bool strafe_right;
	bool up; bool down;
	bool left; bool right;
	bool select;
	bool interact;
	bool pause;
	int mouse_x_delta;
	int mouse_y_delta;

#ifdef BUILD_DEBUG
	struct {
		bool enable;
		bool speed;
		bool up;
		bool down;
	} debug;
#endif
} input_t;

typedef struct memory_region {
	void* begin;
	void* current;
	void* end;
} memory_region_t;

typedef struct memory {
	memory_region_t engine;
	memory_region_t game;
	memory_region_t data1;
	memory_region_t data2;
	memory_region_t scratch;

#ifdef BUILD_DEBUG
	memory_region_t debug;
#endif
} memory_t;