// binary legacy signature
static int widthForHeight(int w, int h, int newHeight) {
  ret iround(newHeight*doubleRatio(w, h));
}

static int widthForHeight(double w, double h, int newHeight) {
  ret iround(newHeight*doubleRatio(w, h));
}

static int widthForHeight(WidthAndHeight img, int newHeight) {
  ret widthForHeight(img.getWidth(), img.getHeight(), newHeight);
}