#include "animation.h"

#include <gint/display.h>

void animation_new(Animation *animation, bopti_image_t *image,
                   unsigned char len, unsigned short frame_ms) {
    animation->image = image;
    animation->frame = 0;
    animation->len = len;
    animation->frame_ms = frame_ms;
    animation->current_ms = 0;
    animation->width = image->width / len;
    animation->height = image->height;
    animation->wrap_dest = 0;
}

void animation_draw(Animation *animation, int x, int y) {
    dsubimage(x, y, animation->image, animation->frame * animation->width, 0,
              animation->width, animation->height, DIMAGE_NONE);
}

void animation_update(Animation *animation, unsigned short frame_ms) {
    animation->current_ms += frame_ms;
    while(animation->current_ms > animation->frame_ms) {
        animation->frame++;
        if(animation->frame >= animation->len) {
            animation->frame = animation->wrap_dest;
        }
        animation->current_ms -= animation->frame_ms;
    }
}