HTML5 drawImage() method to draw image onto the canvas

JavascriptWeb DevelopmentFront End Scripts

To draw image onto the canvas, use the HTML5 drawImage() method:

<!DOCTYPE HTML>
<html>
   <head>
      <script>
         function drawShape(){
            // get the canvas element using the DOM
            var canvas = document.getElementById('mycanvas');
         
            // Make sure we don't execute when canvas isn't supported
            if (canvas.getContext){
               // use getContext to use the canvas for drawing
               var ctx = canvas.getContext('2d');
               // Draw shapes
               var img = new Image();
               img.src = '/images/backdrop.jpg';

               img.onload = function(){
                  ctx.drawImage(img,0,0);
                  ctx.beginPath();
                  ctx.moveTo(30,96);
                  ctx.lineTo(70,66);
                  ctx.lineTo(103,76);
                  ctx.lineTo(170,15);
                  ctx.stroke();
               }
            } else {
               alert('You need Safari or Firefox 1.5+ to see this demo.');
            }
         }
      </script>
   </head>
   <body onload = "drawShape();">
      <canvas id = "mycanvas"></canvas>
   </body>
</html>
raja
Published on 10-Apr-2018 09:23:06
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