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02.data_url.html
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/
02.data_url.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8" />
<meta name="viewport"
content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no, target-densitydpi=device-dpi"/>
<style>
html, body {
overflow: hidden;
width: 100%;
height: 100%;
margin:0;
padding:0;
border: 0;
}
</style>
<script>
function init() {
var canvas = initFullScreenCanvas("mainCanvas");
var ctx = canvas.getContext("2d");
var image = new Image();
image.onload = function() {
// Ready
ctx.drawImage(image, 10, 10);
};
image.src = "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAADIAAAAyCAYAAAAeP4ixAAAAm0lEQVRoQ+" +
"3YMRWAMBQEwcRT/Cv4nuAhYYtQDQaAyXIFe2aedfk65+zLt1jbiwRiJxKwpBWwlrSClrQClrQKlrSKltUKWtIKW" +
"FarYEmraFmtoCWtgGW1Cpa0ipbVClrXf5x9z/LHvzMvEk7diRQsaRUtH3vQklbAsloFS1pFy2oFLWkFLKtVsKRVt" +
"KxW0JJWwLJaBUtaRctqBa0X1+W43qGn25cAAAAASUVORK5CYII=";
}
function initFullScreenCanvas(canvasId) {
var canvas = document.getElementById(canvasId);
resizeCanvas(canvas);
window.addEventListener("resize", function() {
resizeCanvas(canvas);
});
return canvas;
}
function resizeCanvas(canvas) {
canvas.width = document.width || document.body.clientWidth;
canvas.height = document.height || document.body.clientHeight;
}
</script>
</head>
<body onload="init()">
<canvas id="mainCanvas" width="100" height="100"></canvas>
</body>
</html>