image/lib/src/draw/draw_rect.dart

import 'dart:math' as Math;

import '../image.dart';
import 'draw_line.dart';

/**
 * Draw a rectangle in the image [dst] with the [color].
 */
Image drawRect(Image dst, int x1, int y1, int x2, int y2, int color) {
  int x0 = Math.min(x1, x2);
  int y0 = Math.min(y1, y2);
  x1 = Math.max(x1, x2);
  y1 = Math.max(y1, y2);

  drawLine(dst, x0, y0, x1, y0, color);
  drawLine(dst, x1, y0, x1, y1, color);
  drawLine(dst, x0, y1, x1, y1, color);
  drawLine(dst, x0, y0, x0, y1, color);

  return dst;
}