#ifndef UTILS_H
#define UTILS_H

#define BYTE_A 0xFF000000
#define BYTE_R 0x00FF0000
#define BYTE_G 0x0000FF00
#define BYTE_B 0x000000FF
#define BYTE_RGB 0x00FFFFFF
#define BYTE 0xFF
#define LONG_BYTE 0xFFFF

#define SHIFT_8 8
#define SHIFT_16 16
#define SHIFT_24 24

#define MAX 255
#define HALF_MAX ((int)(MAX / 2) + 1)

#define DECODE_A(clr) (((clr) >> SHIFT_24) & BYTE)
#define DECODE_R(clr) (((clr) >> SHIFT_16) & BYTE)
#define DECODE_G(clr) (((clr) >> SHIFT_8) & BYTE)
#define DECODE_B(clr) ((clr) & BYTE)

#define ENCODE_RGB(r, g, b)                                                    \
	(((unsigned int)(MAX) << SHIFT_24) | ((unsigned int)(r) << SHIFT_16) | \
	 ((unsigned int)(g) << SHIFT_8) | (unsigned int)(b))

#define ENCODE_ARGB(a, r, g, b)                                              \
	(((unsigned int)(a) << SHIFT_24) | ((unsigned int)(r) << SHIFT_16) | \
	 ((unsigned int)(g) << SHIFT_8) | (unsigned int)(b))

#define ENCODE_BGRA(b, g, r, a)                                              \
	(((unsigned int)(b) << SHIFT_24) | ((unsigned int)(g) << SHIFT_16) | \
	 ((unsigned int)(r) << SHIFT_8) | (unsigned int)(a))

#define CLAMP_MAX(x) (((x) > MAX) ? MAX : (x))
#define CLAMP_MIN(x) (((x) < 0) ? 0 : (x))

typedef struct
{
	int width, height;
	int len;
	char* name;
	char fmt;
} PPM;

typedef struct
{
	int width, height;
	int len;
	char* name;
} JPEG;

unsigned long
u32to_u64(const unsigned int clr);

unsigned int
u64to_u32(const unsigned long clr, const unsigned long u64_div);

#endif