metasprites.h

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#ifndef _METASPRITES_H_INCLUDE
#define _METASPRITES_H_INCLUDE
 
#include <sms/sms.h>
#include <sms/hardware.h>
#include <types.h>
#include <stdint.h>
 
typedef struct metasprite_t {
    int8_t  dy, dx;
    uint8_t dtile;
} metasprite_t;
 
#define metasprite_end -128
#define METASPR_ITEM(dy,dx,dt,a) {(dy),(dx),(dt)}
#define METASPR_TERM {metasprite_end}
 
extern const void * __current_metasprite;
extern uint8_t __current_base_tile;
extern uint8_t __render_shadow_OAM;
 
 
static uint8_t __move_metasprite(uint8_t id, int16_t x, int16_t y);
static uint8_t __move_metasprite_flipx(uint8_t id, int16_t x, int16_t y);
static uint8_t __move_metasprite_flipy(uint8_t id, int16_t x, int16_t y);
static uint8_t __move_metasprite_flipxy(uint8_t id, int16_t x, int16_t y);
static void __hide_metasprite(uint8_t id) Z88DK_FASTCALL PRESERVES_REGS(iyh, iyl);
 
void hide_sprites_range(uint8_t from, uint8_t to) PRESERVES_REGS(iyh, iyl);
 
inline uint8_t move_metasprite_ex(const metasprite_t * metasprite, uint8_t base_tile, uint8_t base_prop, uint8_t base_sprite, int16_t x, int16_t y) {
    base_prop;
    __current_metasprite = metasprite;
    __current_base_tile = base_tile;
    return __move_metasprite(base_sprite, x, y);
}
 
inline uint8_t move_metasprite(const metasprite_t * metasprite, uint8_t base_tile, uint8_t base_sprite, int16_t x, int16_t y) {
    __current_metasprite = metasprite;
    __current_base_tile = base_tile;
    return __move_metasprite(base_sprite, x, y);
}
 
inline uint8_t move_metasprite_flipx(const metasprite_t * metasprite, uint8_t base_tile, uint8_t base_prop, uint8_t base_sprite, int16_t x, int16_t y) {
    base_prop;
    __current_metasprite = metasprite;
    __current_base_tile = base_tile;
    return __move_metasprite_flipx(base_sprite, x - 8, y);
}
 
inline uint8_t move_metasprite_flipy(const metasprite_t * metasprite, uint8_t base_tile, uint8_t base_prop, uint8_t base_sprite, int16_t x, int16_t y) {
    base_prop;
    __current_metasprite = metasprite;
    __current_base_tile = base_tile;
    return __move_metasprite_flipy(base_sprite, x, y - ((__READ_VDP_REG(VDP_R1) & R1_SPR_8X16) ? 16 : 8) );
}
 
inline uint8_t move_metasprite_flipxy(const metasprite_t * metasprite, uint8_t base_tile, uint8_t base_prop, uint8_t base_sprite, int16_t x, int16_t y) {
    base_prop;
    __current_metasprite = metasprite;
    __current_base_tile = base_tile;
    return __move_metasprite_flipxy(base_sprite, x - 8, y - ((__READ_VDP_REG(VDP_R1) & R1_SPR_8X16) ? 16 : 8));
}
 
inline void hide_metasprite(const metasprite_t * metasprite, uint8_t base_sprite) {
    __current_metasprite = metasprite;
    __hide_metasprite(base_sprite);
}
 
#endif