blob: 013edfd0539b07dd1b03cf01437c575b9516769d (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
|
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<script>
function draw() {
var c = document.getElementById('c').getContext('2d');
c.fillStyle = 'lime';
c.fillRect(0, 0, 100, 50);
var imgdata = c.createImageData(60, 50);
for (var i = 0; i < imgdata.data.length; i += 4 * 60) {
for (var x = i; x < i + 4 * 30; x += 4) {
imgdata.data[x] = 255;
imgdata.data[x+3] = 255;
}
for (var x = i + 4 * 30; x < i + 4 * 60; x += 4) {
imgdata.data[x+2] = 255;
imgdata.data[x+3] = 255;
}
}
// Verify that putImageData is not affected by the current transform.
c.translate(20, 0);
c.putImageData(imgdata, 40, 0);
}
</script>
</head>
<body onload="draw();">
<canvas id='c' width='100' height='50'></canvas>
</body>
</html>
|
