[HTML/HTML5] canvas 엘리먼트 : 컨텍스트 상태 저장/복원하기

■ canvas 엘리먼트에서 컨텍스트의 상태를 저장하고 복원하는 방법을 보여준다.

▶ test.html


<!DOCTYPE html>
<html>
    <head>
        <meta charset="UTF-8">
        <script language="javascript">
            function onLoad()
            {
                var canvas  = document.getElementById('canvas');
                var context = canvas.getContext('2d');

                context.fillStyle = 'blue';

                context.save();

                context.fillRect(0, 0, 100, 100);

                context.fillStyle = 'red';

                context.fillRect(100, 100, 100, 100);

                context.restore();

                context.fillRect(200, 0, 100, 100);
            }
        </script>
    </head>
    <body onload="onLoad();">
        <canvas id="canvas" width="400" height="400" />
    </body>
</html>

<!DOCTYPE html>

<html>

<head>

function onLoad()

{

var canvas = document.getElementById('canvas');

var context = canvas.getContext('2d');

context.fillStyle = 'blue';

context.save();

context.fillRect(0, 0, 100, 100);

context.fillStyle = 'red';

context.fillRect(100, 100, 100, 100);

context.restore();

context.fillRect(200, 0, 100, 100);

}

</script>

</head>

</body>

</html>