Linear gradients
Linear gradients can be used in place of regular color definitions to add
gradients to your canvas
. They are specified using
the gradient api
and can consist of multiple colors. The createLinearGradient
function is used to create the gradient and then
the addColorStop
function is used to add color stops along
the gradient from left to right.
Arguments to the function
- The X1 coordinate
- The Y1 coordinate
- The X2 coordinate
- The Y2 coordinate
An example
<script>
window.onload = function ()
{
var canvas = document.getElementById("cvs");
var context = canvas.getContext('2d');
// This creates the gradient from black to red to white
var gradient = context.createLinearGradient(0,0,600,0);
gradient.addColorStop(0, 'black');
gradient.addColorStop(0.5, 'red');
gradient.addColorStop(1, 'white');
context.fillStyle = gradient
context.strokeStyle = 'black';
context.strokeRect(10,10,580,230);
context.fillRect(10,10,580,230);
}
</script>
See also