!752

!include #1000522 // image helper functions

p {

  RGBImage targetImg = new RGBImage(200, 200, Color.blue);

  RGBImage img = new RGBImage(200, 200, Color.white);

  render(img, "fill(\"808000\");");

  print("Diff: " + diff(img, targetImg));

  showImage(img);

}

static void render(RGBImage img, S script) {

  L<S> tok = javaTok(script);

  new Matches m;

  for (L<S> s : statements(tok)) {

    if (jmatch("fill(*);", s, m)) {

      fill(img, m.unq(0));

    } else

      fail("unknown statement: " + join(s));

  }

}

static void fill(RGBImage img, S col) {

  RGB rgb = new RGB(col);

  int w = img.getWidth(), h = img.getHeight();

  for (int y = 0; y < h; y++)

    for (int x = 0; x < w; x++)

      img.setPixel(x, y, rgb);

}

// assumes that it's a list of statements; return them one by one

static L<L<S>> statements(L<S> tok) {

  new L<L<S>> l;

  int i = 0;

  while (i < l(tok)) {

    int j = indexOf(tok, ";", i);

    if (j < 0) {

      if (l(tok)-i >= 3)

        l.add(tok.subList(i, l(tok)));

      break;

    } else {

      l.add(tok.subList(i, j+2)); // actual CNC - we may return some comments twice, but we don't look at them anyways.

      i = j+1; // go to non-code token

    }

  }

  ret l;

}