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
34
35
36
37
38
39
40
41
42
|
<!DOCTYPE html>
<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
<meta charset="UTF-8">
<link rel="match" href="2d.layer.non-invertible-matrix.shadow-expected.html">
<title>Canvas test: 2d.layer.non-invertible-matrix.shadow</title>
<h1>2d.layer.non-invertible-matrix.shadow</h1>
<p class="desc">Test drawing layers when the transform is not invertible.</p>
<canvas id="canvas" width="200" height="200">
<p class="fallback">FAIL (fallback content)</p>
</canvas>
<script>
const canvas = document.getElementById("canvas");
const ctx = canvas.getContext('2d');
ctx.fillStyle = 'blue';
ctx.fillRect(30, 30, 50, 50);
// Anything below will be non-rasterizable.
ctx.scale(1, 0);
ctx.shadowOffsetX = 0;
ctx.shadowOffsetY = 20;
ctx.shadowColor = 'rgba(255, 165, 0, 0.6)';
// Open the layer with a non-invertible matrix. The whole layer will be
// non-rasterizable.
ctx.beginLayer();
// Because the transform is global, the matrix is still non-invertible.
ctx.fillStyle = 'rgba(225, 0, 0, 1)';
ctx.fillRect(40, 70, 50, 50);
// Set a valid matrix in the middle of the layer. This makes the global
// matrix invertible again, but because because the layer was opened with a
// non-invertible matrix, the whole layer remains non-rasterizable.
ctx.setTransform(1, 0, 0, 1, 0, 0);
ctx.fillStyle = 'green';
ctx.fillRect(70, 40, 50, 50);
ctx.endLayer();
</script>
|
