!752

!include #1000522 // image helper functions

static RGBImage targetImg;
static S bestScript;
static double bestScore;

static ImageSurface imageSurface;

p {
  targetImg = new RGBImage(200, 200, Color.blue);
  
  while true {
    RGBImage img = new RGBImage(200, 200, Color.white);
    S scriptSchema = "fill(<color1>);";
    S script = makeScript(scriptSchema);
    //print ("Script: " + script);
    render(img, script);
    double score = diffToPercent(diff(img, targetImg));
    if (score > bestScore || (score == bestScore && l(script) < l(bestScript))) {
      bestScore = score;
      bestScript = script;
      print("New best score: " + score + ", script: " + script);
      imageSurface = showImage(img, imageSurface);
    }
  }
}

// assumes diff is between 0.0 (full score) and 1.0 (least score)
static double diffToPercent(double diff) {
  ret 100*(1-diff);
}

static S makeScript(S schema) {
  L<S> tok = javaTok(schema);
  int i = findCodeTokens(tok, "<", "color1", ">");
  if (i >= 0) {
    clearAllTokens(tok, i, i+5);
    tok.set(i, quote(randomColor().toString()));
    tok = javaTok(tok);
  }
  ret join(tok);
}

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));
  }
}

Began life as a copy of #1001877