<!DOCTYPE html> <html> <body> <canvas id="myCanvas" width="300" height="150" style="border:1px solid #d3d3d3;"> Your browser does not support the HTML5 canvas tag.</canvas> <script> var c=document.getElementById("myCanvas"); var ctx=c.getContext("2d"); ctx.fillStyle="red"; ctx.fillRect(10,10,50,50); function copy() { var imgData=ctx.getImageData(10,10,50,50); ctx.putImageData(imgData,10,70); } </script> <button onclick="copy()">Copy</button> </body> </html>
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