solved. had canvasfingerprintblock installed.
i want draw , read colors everytime run it'll return [0, 0, ....] rgba color.
imgdata.data.reduce((a, b) => + b); // => 0 does of know i'm doing wrong , can me out please?
thanks.
function main() { var bits = 8; var power = 4; var width = math.pow(2, power); var height = math.pow(2, power); var chartdata = []; var data = []; var canvas = document.getelementbyid("canvas"); canvas.width = width; canvas.height = height; var context = canvas.getcontext("2d"); (var _ = 0; _ < 1; _++) { var char = math.floor(math.random() * 10); context.clearrect(0, 0, width, height); context.fillstyle = "gray"; context.fillrect(0, 0, width, height); context.font = height + 'px arial'; context.fillstyle = "black"; context.textbaseline = "middle"; context.textalign = "center"; context.filltext(char+"", width / 2, height / 2); var imgdata = context.getimagedata(0, 0, width, height); var grayscale = array.apply(null, new array(width * height)).map((v) => 0); var __constnum = 255 * 255; document.getelementbyid("quaddiffchart").innerhtml = imgdata.data.reduce((a, b) => + b); } };<?php include("init.php"); ?> <!doctype html> <html> <head> <meta charset="utf-8"> <title></title> <style media="screen"> #can{ } </style> <?php printcss(); ?> </head> <body onload="main()"> <div id="quaddiffchart"> </div> <canvas id="canvas" width="300" height="300"></canvas> </body> </html>
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