canvas绘制表情包的示例代码canvas里面如何基于随机点绘制一个多边形的方法详解canvas在圆弧周围绘制文本的两种写法canvas绘制视频封面的方法HTML5 canvas基本绘图之绘制阴影效果HTML5 canvas基本绘图之绘制曲线HTML5 canvas基本绘图之绘制线条HTML5 canvas基本绘图之绘制五角星HTML5 canvas基本绘图之绘制矩形HTML5 canvas基本绘图之绘制线段html5 canvas绘制矩形和圆形的实例代码

 var canvas = document.getElementById('canvas'); var context = canvas.getContext('2d'); // 画脸,设置脸的填充颜色为 '#fff' context.fillStyle = '#fff'; context.beginPath(); context.arc(150, 150, 60, 0, Math.PI*2); context.closePath(); context.fill(); // 画眼睛,设置眼睛的填充颜色为 'rgb(0, 0, 0)' context.fillStyle = 'rgb(0, 0, 0)'; context.beginPath(); context.arc(130, 130, 8, 0, Math.PI*2); context.closePath(); context.fill(); context.fillStyle = 'rgb(0, 0, 0)'; context.beginPath(); context.arc(170, 130, 8, 0, Math.PI*2); context.closePath(); context.fill(); // 画嘴巴,设置嘴巴的填充颜色为 'rgba(255, 0, 0, 0.8)' context.fillStyle = 'rgba(255, 0, 0, 0.8)'; context.beginPath(); context.arc(150, 160, 25, Math.PI, Math.PI*2, true); context.closePath(); context.fill(); // 画腮红,设置腮红线条颜色为 'pink',线条宽度为 5 context.beginPath(); context.moveTo(95, 152); context.lineTo(110, 150); context.moveTo(190, 150); context.lineTo(205, 152); context.closePath(); context.lineWidth = 5; context.strokeStyle = 'pink'; context.stroke();

 var canvas = document.getElementById('canvas'); var context = canvas.getContext('2d'); var image = new Image(); image.src= 'https://ke.qq.com/classroom/assets/lib/img/canvas-expression-base.png'; image.onload = function(){ context.drawImage(image, 50, 110, 200, 200); } context.font = '30px arial'; context.fillText('今天的我', 20, 50); context.font = '40px arial'; context.fillText('还是一样的帅！', 20, 90);