小游戏在安卓小米Max中绘制图片出现重复平铺
小游戏在安卓小米Max中绘制图片出现重复平铺,在苹果手机中正常显示原图片大小
import './js/libs/weapp-adapter'
var moon = new Image(); var earth = new Image(); function init() { sun.src = 'https://mdn.mozillademos.org/files/1456/Canvas_sun.png' ; moon.src = 'https://mdn.mozillademos.org/files/1443/Canvas_moon.png' ; earth.src = 'https://mdn.mozillademos.org/files/1429/Canvas_earth.png' ; requestAnimationFrame(draw); } function draw() { var ctx=canvas.getContext( '2d' ); ctx.globalCompositeOperation = 'destination-over' ; ctx.clearRect(0, 0, 300, 300); // clear canvas ctx.fillStyle = 'rgba(0,0,0,0.4)' ; ctx.strokeStyle = 'rgba(0,153,255,0.4)' ; ctx.save(); ctx.translate(150, 150); // Earth var time = new Date(); ctx.rotate(((2 * Math.PI) / 60) * time.getSeconds() + ((2 * Math.PI) / 60000) * time.getMilliseconds()); ctx.translate(105, 0); ctx.fillRect(0, -12, 50, 24); // Shadow ctx.drawImage(earth, -12, -12); // Moon ctx.save(); ctx.rotate(((2 * Math.PI) / 6) * time.getSeconds() + ((2 * Math.PI) / 6000) * time.getMilliseconds()); ctx.translate(0, 28.5); ctx.drawImage(moon, -3.5, -3.5); ctx.restore(); ctx.restore(); ctx.beginPath(); ctx.arc(150, 150, 105, 0, Math.PI * 2, false ); // Earth orbit ctx.stroke(); ctx.drawImage(sun, 0, 0, 300, 300); requestAnimationFrame(draw); } init(); |