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Canvas reference: Radial gradients

[No canvas support]

Radial gradients can be used in place of regular color definitions to add gradients to your canvas. They're different to linear gradients as they're circular in nature as the name suggests. They're specified using the gradient API and can consist of multiple colors. The createRadialGradient() function is used to create the gradient and then the addColorStop() function is used to add points along the gradient - in a similar way to linear gradients.

Arguments to the function

An example

    window.onload = function ()
        var canvas  = document.getElementById('cvs');
        var context = canvas.getContext('2d');
        // Create the gradient
        var gradient = context.createRadialGradient(175,75,0,175,75,100);
        gradient.addColorStop(0, 'white');
        gradient.addColorStop(1, 'rgb(255,125,125)');
        context.fillStyle = gradient
        context.arc(125,125,100,0,Math.PI * 2, false);

See also: