#include "tile.h"

Tile tileAdd(TileMap *tm, int ts, double s) {

  if (ts <= 0) return (Tile){};

  if (ts > TM_SIZE) ts = TM_SIZE;

  if (ts > TM_SIZE - tm->x) { tm->x = 0; tm->y0 = tm->y1; }

  if (ts > TM_SIZE - tm->y0) {

    TileMap *ntm = (TileMap*)alloc(sizeof(*ntm));

    *ntm = *tm;

    memset(tm, 0, sizeof(*tm));

    tm->next = ntm;

  }

  if (!tm->fb) tm->fb = createFramebufferEx(TM_SIZE, TM_SIZE, NULL, FALSE, FALSE, TRUE);

  if (!tm->tex) tm->tex = createAnimationFromFramebuffer(tm->fb);

  Tile t = { {tm->x/(double)TM_SIZE, tm->y0/(double)TM_SIZE}, ts/(double)TM_SIZE, s, tm->fb, tm->tex };

  tm->x += ts;

  if (tm->y1 < tm->y0 + ts) tm->y1 = tm->y0 + ts;

  return t;

}

void tileClear(TileMap *tm) {

  if (tm->next) tileClear(tm->next);

  tm->x = tm->y0 = tm->y1 = 0;

}

void tileFree(TileMap *tm) {

  if (tm->next) { tileFree(tm->next); free(tm->next); }

  if (tm->tex) animationDestroy(tm->tex);

  if (tm->fb) framebufferDestroy(tm->fb);

  memset(tm, 0, sizeof(*tm));

}