HTML canvas createRadialGradient () method
Examples
Draw a rectangle with a radial / circular gradient fill:
JavaScript:
var c=document.getElementById("myCanvas");
var ctx=c.getContext("2d");
var grd=ctx.createRadialGradient(75,50,5,90,60,100);
grd.addColorStop(0,"red");
grd.addColorStop(1,"white");
// Fill with gradient
ctx.fillStyle=grd;
ctx.fillRect(10,10,150,100);
var ctx=c.getContext("2d");
var grd=ctx.createRadialGradient(75,50,5,90,60,100);
grd.addColorStop(0,"red");
grd.addColorStop(1,"white");
// Fill with gradient
ctx.fillStyle=grd;
ctx.fillRect(10,10,150,100);
try it"
Browser Support
Internet Explorer 9, Firefox, Opera, Chrome and Safari support createRadialGradient () method.
Note: 8 and earlier versions of Internet Explorer do not support the <canvas> element.
Definition and Usage
createRadialGradient () method creates a radial / circular gradient object.
Gradient can be used to fill rectangles, circles, lines, text, and so on.
Tip: Use this object as strokeStyle or fillStyle value of the property.
Tip: Use addColorStop () method specifies a different color, as well as where to locate the color gradient object.
| JavaScript syntax: | context .createRadialGradient (x0, y0, r0, x1, y1, r1); |
|---|
Parameter Value
| 参数 | 描述 |
|---|---|
| x0 | 渐变的开始圆的 x 坐标 |
| y0 | 渐变的开始圆的 y 坐标 |
| r0 | 开始圆的半径 |
| x1 | 渐变的结束圆的 x 坐标 |
| y1 | 渐变的结束圆的 y 坐标 |
| r1 | 结束圆的半径 |
HTML canvas Reference Manual