breakout_platform.h

// NOTE: Common definitions and typedefs - may be freely used by platform layer

typedef unsigned char u8;
typedef unsigned short u16;
typedef unsigned int u32;
typedef unsigned long long int u64;

typedef signed char i8;
typedef signed short i16;
typedef signed int i32;
typedef signed long long int i64;

typedef float f32;
typedef double f64;

typedef unsigned int b32;

#define function static
#define global static
#define persistent static

#define Assert(x) if(!(x)) { *(int*)(0) = 0; }
#define StaticAssert(x) typedef char static_assert_##__LINE__[(x)?1:-1]

#define ArrayLength(x) (sizeof(x)/sizeof(x[0]))

#define Min(x, y) ((x) <= (y) ? (x) : (y))
#define Max(x, y) ((x) >= (y) ? (x) : (y))

// NOTE: Game structs and declarations - platform must use and call following API

typedef struct
{
    u8 Buffer[10 * 1024];
} game_memory;

typedef struct
{
    i32 Width;
    i32 Height;
    i32 Pitch;
    u8* At;
} game_screen;

enum
{
    GAME_KEYS_RETURN_Pos,
    GAME_KEYS_SPACE_Pos,
    GAME_KEYS_LEFT_Pos,
    GAME_KEYS_RIGHT_Pos,
    GAME_KEYS_UP_Pos,
    GAME_KEYS_DOWN_Pos,
    GAME_KEYS_ESCAPE_Pos,
};

#define GAME_KEYS_RETURN_Msk (1 << GAME_KEYS_RETURN_Pos)
#define GAME_KEYS_SPACE_Msk (1 << GAME_KEYS_SPACE_Pos)
#define GAME_KEYS_LEFT_Msk (1 << GAME_KEYS_LEFT_Pos)
#define GAME_KEYS_RIGHT_Msk (1 << GAME_KEYS_RIGHT_Pos)
#define GAME_KEYS_UP_Msk (1 << GAME_KEYS_UP_Pos)
#define GAME_KEYS_DOWN_Msk (1 << GAME_KEYS_DOWN_Pos)
#define GAME_KEYS_ESCAPE_Msk (1 << GAME_KEYS_ESCAPE_Pos)

function void GameInit(game_memory* Memory, i32 Width, i32 Height);
function void GameResolutionChanged(game_memory* Memory, i32 PrevWidth, i32 PrevHeight, i32 Width, i32 Height);
function void GameUpdate(game_memory* Memory, game_screen* Screen, unsigned Keys, int SecondsSinceStart);