Function getContext

index.js:97–108

(canvas)

  };

  function getContext(canvas) {
    const context = canvas.getContext("2d", {willReadFrequently: true});

    canvas.width = canvas.height = 1;
    const ratio = Math.sqrt(context.getImageData(0, 0, 1, 1).data.length >> 2);
    canvas.width = (cw << 5) / ratio;
    canvas.height = ch / ratio;

    context.fillStyle = context.strokeStyle = "red";

    return {context, ratio};
  }

  function place(board, tag, bounds) {
    var perimeter = [{x: 0, y: 0}, {x: size[0], y: size[1]}],