// Game Boy Advance library for Logic Machines F'05
// Version 7, December 7, 2005

#ifndef __GBAIO__
#define __GBAIO__

#include "gbamath.h"


// ****************************************************************************************************
// Constants

// Use these image size constants for the third parameter to load_image()

#define IMAGE_8x8			0
#define IMAGE_16x16		1
#define IMAGE_32x32		2
#define IMAGE_64x64		3
#define IMAGE_16x8		4
#define IMAGE_32x8		5
#define IMAGE_32x16		6
#define IMAGE_64x32		7
#define IMAGE_8x16		8
#define IMAGE_8x32		9
#define IMAGE_16x32		10
#define IMAGE_32x64		11


// Use these constants as the parameter to button_pressed(), button_released() and button_held()

#define A_BUTTON		(1 << 0)	// 1
#define B_BUTTON		(1 << 1)	// 2
#define SELECT_BUTTON	(1 << 2)	// 4
#define START_BUTTON	(1 << 3)	// 8
#define RIGHT_BUTTON	(1 << 4)	// 16
#define LEFT_BUTTON		(1 << 5)	// 32
#define UP_BUTTON		(1 << 6)	// 64
#define DOWN_BUTTON		(1 << 7)	// 128
#define R_BUTTON		(1 << 8)	// 256
#define L_BUTTON		(1 << 9)	// 512

// Use these constants in place of 0 and 1 to improve code legibility

#define TRUE	1
#define FALSE	0
#define YES		1
#define NO		0

// gbaio uses some sprites for its own wise purposes. It reserves sprites numbered from 511 and down.
// This is the last available sprite number that you can use.

#define LAST_AVAILABLE_SPRITE_NUMBER	497


// ****************************************************************************************************
// Miscellaneous functions

// start up the gbaio library
void start_game(void);

// return a random number from min to max
int rand(int min, int max);


// ****************************************************************************************************
// Input functions

// get ready to check inputs
void start_input(void);

// did a button get pressed?
int button_pressed(int which);

// did a button get released?
int button_released(int which);

// is a button down?
int button_held(int which);


// ****************************************************************************************************
// Drawing functions

// load an image into sprite image memory
void load_image(int image_number, const char *image, int size);

// get ready to draw
int start_drawing(void);

// set the image for a sprite
void set_sprite_image(int sprite_number, int image_number);

// place a sprite on the screen
void draw_sprite(int sprite_number, int x, int y);

// set a color in the sprite palette
void set_color(int color_number, int red, int green, int blue);

// draw a dot on the screen
void draw_dot(int x, int y, int r, int g, int b);

// sets background to a single color
void color_background( int r, int g, int b );


// set a transform to a rotation angle
void set_transform_rotation(int transform_number, real angle);

// now assign a transform to a sprite
void set_sprite_transform(int sprite_number, int transform_number);

void load_animation( int, int* );
void set_sprite_animation( int, int, int, int );
void animate_sprite( int );
struct sprite_anim make_sprite_anim( int, int, int, int, int );

// draw a number at x,y using a bunch of sprites (one sprite per character, usually less than 10)
void draw_number(int number, int x, int y, int first_sprite_number, int max_sprites);

// super version of draw_number
void draw_number_advanced(int number, int x, int y, int first_sprite_number, int num_sprites, int force_sign, int draw_leading_zeroes, int max_digits);

// aha! draw a real number, same idea as draw_number
void draw_real(real number, int x, int y, int first_sprite_number, int num_sprites);

// super version of draw_real
void draw_real_advanced(real number, int x, int y, int first_sprite_number, int num_sprites, int precision);

// oh yeah, this isn't obvious, but because numbers are drawn with sprites, you have to move the
// sprites off the screen when you don't want the number drawn any more.
void clear_number(int first_sprite_number, int num_sprites);

// don't call this
void video_mode(int mode);

// same as RGB5
unsigned short rgb_color(int red, int green, int blue);

#endif