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ViewsChange pixel color from white to transparent in Canvas
So i have this embed in my site (top forecast), which i copied onto a new canvas (bottom forecast) in hopes i can modify the colors in the canvas from white to transparent. I would need it to ignore the white pixels within bottom row of boxes but change the white background to transparent.
Any help? This is the code that i have so far:
<!DOCTYPE html>
<html lang="eng">
<head>
<meta charset="UTF-8">
<meta nameset="viewport" content="with=device-width, initial-scale=1.0">
<title>ClearOutside</title>
<style type="text/css">
body {
background-color: transparent;
-ms-zoom: 0.5;
-moz-transform: scale(0.5);
-moz-transform-origin: 0 0;
-o-transform: scale(0.5);
-o-transform-origin: 0 0;
-webkit-transform: scale(0.5);
-webkit-transform-origin: 0 0;
}
</style>
</head>
<body style="background-color:blue">
<a href="https://clearoutside.com/forecast/37.61/15.10">
<img id="forecast" src="https://clearoutside.com/forecast_image_small/37.61/15.10/forecast.png" /></a>
<canvas id="myCanvas" width="505" height="41">
<script>
document.getElementById("forecast").onload = function() {
var c = document.getElementById("myCanvas");
var ctx = c.getContext("2d");
var img = document.getElementById("forecast");
ctx.drawImage(img, 0, 0);
};
</script>
</body>
</html>
·
Juan Pablo Isaza
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