當(dāng)我將線寬設(shè)置為大于 1 時(shí)，線會(huì)顯示為裁剪?？紤]到定義的線寬，我想知道如何在畫(huà)布尺寸中顯示多邊形而不被裁剪。提前致謝！var c = document.getElementById("myCanvas");var ctx = c.getContext("2d");var polygon = [  {x: 178, y: 160}, {x: 124, y: 0}, {x: 265, y: 88},  {x: 382, y: 0}, {x: 393, y: 118}, {x: 770, y: 178},  {x: 479, y: 221}, {x: 441, y: 228}, {x: 579, y: 376},  {x: 309, y: 314}, {x: 197, y: 428}, {x: 183, y: 304},  {x: 0, y: 324}, {x: 132, y: 240}, {x: 36, y: 152}];ctx.strokeStyle = "rgba(46, 139, 86, 1.00)";ctx.fillStyle = "rgba(156, 205, 50, 1.00)";ctx.lineWidth = 9;ctx.beginPath();ctx.moveTo(polygon[0].x, polygon[0].y);for( var i = 1; i<polygon.length; i++){    ctx.lineTo(polygon[i].x, polygon[i].y);}ctx.closePath();ctx.stroke();ctx.fill();<canvas id="myCanvas" width="770" height="428" style="border:1px solid #d3d3d3;"></canvas>