canvas의 save, restore : 설정 저장,복구



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<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <meta name="viewport" 
          content="width=device-width, height=device-height, 
                     minimum-scale=1.0, maximum-scale=1.0, initial-scale=1.0">
    <title>Insert title here</title>
    <script type="text/javascript">
    window.onload = function(){
        var canvas = document.getElementById("canvas");
        if(canvas.getContext){
            var draw = canvas.getContext("2d");
            
            draw.lineWidth = 5;
            draw.strokeStyle = "red";
            
            //save : 시점 저장
            draw.save();    
            draw.beginPath();
            draw.moveTo(50,50);
            draw.lineTo(250,50);
            draw.lineWidth = 10;
            draw.strokeStyle = "green";
            draw.stroke();
            //restore : 저장하기 전으로 돌아가기
            draw.restore();
            
            draw.beginPath();
            draw.moveTo(50,100);
            draw.lineTo(250,100);
            draw.stroke();    //저장하기전 속성이 적용된다
        }
    }
    </script>
</head>
 
<body>
    <canvas id="canvas" width="300px" height="400px"></canvas>
</body>
</html>
cs



결과

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