标签:red creat fill http ADG 线性 style ima lin
方法
createLinearGradient(x1, y1, x2, y2) 线性渐变
createRadialGradient(x1, y1, r1, x2, y2, r2) 辐射渐变
线性渐变
const canvas = document.getElementById(‘canvas‘);
const ctx = canvas.getContext(‘2d‘);
var lingrad = ctx.createLinearGradient(0, 0, 0, 150);
lingrad.addColorStop(0, ‘orange‘);
lingrad.addColorStop(0.5, ‘red‘);
lingrad.addColorStop(1, ‘pink‘);
ctx.fillStyle = lingrad;
ctx.fillRect(10, 10, 130, 130);
径向渐变
var radgrad = ctx.createRadialGradient(90, 90, 20, 100, 100, 50);
radgrad.addColorStop(0, ‘white‘);
radgrad.addColorStop(0.6, ‘rgba(255, 165, 0, 0.8)‘);
radgrad.addColorStop(0.8, ‘rgba(255, 165, 0, 0.3)‘);
radgrad.addColorStop(1, ‘rgba(255, 165, 0, 0)‘);
ctx.fillStyle = radgrad;
ctx.fillRect(0, 0, 150, 150);
标签:red creat fill http ADG 线性 style ima lin
原文地址:https://www.cnblogs.com/ye-hcj/p/10357429.html