Capítulo 4

Canvas - Exemplo 14: gradiente linear.

Conteúdo alternativo para navegadores que não suportam canvas.

JavaScript

<script>
window.onload = function() {
var canvas = document.getElementById('quadro');
var ctx = canvas.getContext('2d'); 

	gradient = ctx.createLinearGradient(10,10,250,100);
	gradient.addColorStop(0, '#f00');
	gradient.addColorStop(1, '#00f');
	
	gradient1 = ctx.createLinearGradient(330,20,330,160);
	gradient1.addColorStop(0, '#090');
	gradient1.addColorStop(0.5, '#ff9');
	gradient1.addColorStop(1, '#9cf');
	
	gradient2 = ctx.createLinearGradient(60,120,180,120);
	gradient2.addColorStop(0, '#f90');
	gradient2.addColorStop(1, '#ffc');
	
	ctx.fillStyle = gradient;
	ctx.fillRect(10,10,250,100)
	
	ctx.fillStyle = gradient1;
	ctx.fillRect(280,20,100,160)
	
	ctx.fillStyle = gradient2;
	ctx.arc(120,120,60,0,2*Math.PI, true)
	ctx.fill();
}
</script>

CSS

	canvas {border:1px solid #ccc;}

HTML

	<canvas id="quadro" width="400" height="200">
		<p>Conteúdo alternativo para navegadores que não suportam canvas.</p>
	</canvas>