metasprites.h

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#ifndef _METASPRITES_H_INCLUDE
#define _METASPRITES_H_INCLUDE
 
#include <gb/hardware.h>
#include <types.h>
#include <stdint.h>
 
typedef struct metasprite_t {
    int8_t  dy, dx;
    uint8_t dtile;
    uint8_t props;
} metasprite_t;
 
#define metasprite_end -128
#define METASPR_ITEM(dy,dx,dt,a) {(dy),(dx),(dt),(a)}
#define METASPR_TERM {metasprite_end}
 
extern const void * __current_metasprite;
extern uint8_t __current_base_tile;
extern uint8_t __current_base_prop;
extern uint8_t __render_shadow_OAM;
 
 
static uint8_t __move_metasprite(uint8_t id, uint16_t yx);
static uint8_t __move_metasprite_flipx(uint8_t id, uint16_t yx);
static uint8_t __move_metasprite_flipy(uint8_t id, uint16_t yx);
static uint8_t __move_metasprite_flipxy(uint8_t id, uint16_t yx);
static uint8_t __move_metasprite_vflip(uint8_t id, uint16_t yx);
static uint8_t __move_metasprite_hflip(uint8_t id, uint16_t yx);
static uint8_t __move_metasprite_hvflip(uint8_t id, uint16_t yx);
static void __hide_metasprite(uint8_t id);
 
void hide_sprites_range(uint8_t from, uint8_t to);
 
inline uint8_t move_metasprite_ex(const metasprite_t * metasprite, uint8_t base_tile, uint8_t base_prop, uint8_t base_sprite, uint8_t x, uint8_t y) {
    __current_metasprite = metasprite;
    __current_base_tile = base_tile;
    __current_base_prop = base_prop;
    return __move_metasprite(base_sprite, (y << 8) | (uint8_t)x);
}
 
inline uint8_t move_metasprite(const metasprite_t * metasprite, uint8_t base_tile, uint8_t base_sprite, uint8_t x, uint8_t y) {
    __current_metasprite = metasprite;
    __current_base_tile = base_tile;
    __current_base_prop = 0;
    return __move_metasprite(base_sprite, (y << 8) | (uint8_t)x);
}
 
inline uint8_t move_metasprite_flipx(const metasprite_t * metasprite, uint8_t base_tile, uint8_t base_prop, uint8_t base_sprite, uint8_t x, uint8_t y) {
    __current_metasprite = metasprite;
    __current_base_tile = base_tile;
    __current_base_prop = base_prop;
    return __move_metasprite_flipx(base_sprite, (y << 8) | (uint8_t)(x - 8u));
}
 
inline uint8_t move_metasprite_vflip(const metasprite_t * metasprite, uint8_t base_tile, uint8_t base_sprite, uint8_t x, uint8_t y) {
    __current_metasprite = metasprite;
    __current_base_tile = base_tile;
    __current_base_prop = 0;
    return __move_metasprite_vflip(base_sprite, (y << 8) | (uint8_t)(x - 8u));
}
 
 
inline uint8_t move_metasprite_flipy(const metasprite_t * metasprite, uint8_t base_tile, uint8_t base_prop, uint8_t base_sprite, uint8_t x, uint8_t y) {
    __current_metasprite = metasprite;
    __current_base_tile = base_tile;
    __current_base_prop = base_prop;
    return __move_metasprite_flipy(base_sprite, ((y - ((LCDC_REG & LCDCF_OBJ16) ? 16u : 8u)) << 8) | x);
}
 
inline uint8_t move_metasprite_hflip(const metasprite_t * metasprite, uint8_t base_tile, uint8_t base_sprite, uint8_t x, uint8_t y) {
    __current_metasprite = metasprite;
    __current_base_tile = base_tile;
    __current_base_prop = 0;
    return __move_metasprite_hflip(base_sprite, ((y - ((LCDC_REG & LCDCF_OBJ16) ? 16u : 8u)) << 8) | x);
}
 
inline uint8_t move_metasprite_flipxy(const metasprite_t * metasprite, uint8_t base_tile, uint8_t base_prop, uint8_t base_sprite, uint8_t x, uint8_t y) {
    __current_metasprite = metasprite;
    __current_base_tile = base_tile;
    __current_base_prop = base_prop;
    return __move_metasprite_flipxy(base_sprite, ((y - ((LCDC_REG & LCDCF_OBJ16) ? 16u : 8u)) << 8) | (uint8_t)(x - 8));
}
 
inline uint8_t move_metasprite_hvflip(const metasprite_t * metasprite, uint8_t base_tile, uint8_t base_sprite, uint8_t x, uint8_t y) {
    __current_metasprite = metasprite;
    __current_base_tile = base_tile;
    __current_base_prop = 0;
    return __move_metasprite_hvflip(base_sprite, ((y - ((LCDC_REG & LCDCF_OBJ16) ? 16u : 8u)) << 8) | (uint8_t)(x - 8));
}
 
inline void hide_metasprite(const metasprite_t * metasprite, uint8_t base_sprite) {
    __current_metasprite = metasprite;
    __hide_metasprite(base_sprite);
}
 
#endif