sprite.h

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// -*- coding: utf-8-unix -*-
/*
 * Copyright (c) 2021-2024 Daishi Mori (mori0091)
 *
 * This software is released under the MIT License.\n
 * See https://github.com/mori0091/libmsx/blob/main/LICENSE
 *
 * GitHub libmsx project\n
 * https://github.com/mori0091/libmsx
 */
#pragma once
 
#ifndef SPRITE_H
#define SPRITE_H
 
#include <stdint.h>
 
#include "vmem.h"
 
// ---- Sprite
enum sprite_tag {
  SPRITE_TAG_IC = (1<<5),       // IC bit (Ignore Collision)
  SPRITE_TAG_CC = (1<<6),       // CC bit (Compose Color / Cancel Collision)
  SPRITE_TAG_EC = (1<<7),       // EC bit (Early Clock)
};
 
typedef uint8_t tagged_color_t;
 
struct sprite {
  uint8_t y;                    
  uint8_t x;                    
  uint8_t pat;                  
  tagged_color_t tagged_color;  
};
 
void sprite_set_x(struct sprite* s, int x);
void sprite_set_y(struct sprite* s, int y);
void sprite_set_xy(struct sprite* s, int x, int y);
void sprite_set_pat(struct sprite* s, uint8_t pat);
void sprite_set_color(struct sprite* s, tagged_color_t tagged_color);
 
inline
void vmem_set_sprite(vmemptr_t base, uint8_t plane, const struct sprite* s) {
  vmem_write(base + plane * sizeof(struct sprite), (void*)s, sizeof(struct sprite));
}
 
void vmem_init_sprites(vmemptr_t base);
 
#endif