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
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
|
<!DOCTYPE html>
<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
<title>Canvas test: 2d.layer.malformed-operations</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/html/canvas/resources/canvas-tests.js"></script>
<link rel="stylesheet" href="/html/canvas/resources/canvas-tests.css">
<script>
test(t => {
const canvas = document.createElement('canvas');
const ctx = canvas.getContext('2d');
// Shouldn't throw on its own.
ctx.createPattern(canvas, 'repeat');
// Make sure the exception isn't caused by calling the function twice.
ctx.createPattern(canvas, 'repeat');
// Calling again inside a layer should throw.
ctx.beginLayer();
assert_throws_dom("InvalidStateError",
() => ctx.createPattern(canvas, 'repeat'));
}, "Throws if createPattern is called while layers are open.");
test(t => {
const canvas = document.createElement('canvas');
const ctx = canvas.getContext('2d');
const canvas2 = new OffscreenCanvas(200, 200);
const ctx2 = canvas2.getContext('2d');
// Shouldn't throw on its own.
ctx2.drawImage(canvas, 0, 0);
// Make sure the exception isn't caused by calling the function twice.
ctx2.drawImage(canvas, 0, 0);
// Calling again inside a layer should throw.
ctx.beginLayer();
assert_throws_dom("InvalidStateError",
() => ctx2.drawImage(canvas, 0, 0));
}, "Throws if drawImage is called while layers are open.");
test(t => {
const canvas = document.createElement('canvas');
const ctx = canvas.getContext('2d');
// Shouldn't throw on its own.
ctx.getImageData(0, 0, 200, 200);
// Make sure the exception isn't caused by calling the function twice.
ctx.getImageData(0, 0, 200, 200);
// Calling again inside a layer should throw.
ctx.beginLayer();
assert_throws_dom("InvalidStateError",
() => ctx.getImageData(0, 0, 200, 200));
}, "Throws if getImageData is called while layers are open.");
test(t => {
const canvas = document.createElement('canvas');
const ctx = canvas.getContext('2d');
const canvas2 = new OffscreenCanvas(200, 200);
const ctx2 = canvas2.getContext('2d')
const data = ctx2.getImageData(0, 0, 1, 1);
// Shouldn't throw on its own.
ctx.putImageData(data, 0, 0);
// Make sure the exception isn't caused by calling the function twice.
ctx.putImageData(data, 0, 0);
// Calling again inside a layer should throw.
ctx.beginLayer();
assert_throws_dom("InvalidStateError",
() => ctx.putImageData(data, 0, 0));
}, "Throws if putImageData is called while layers are open.");
test(t => {
const canvas = document.createElement('canvas');
const ctx = canvas.getContext('2d');
// Shouldn't throw on its own.
canvas.toDataURL();
// Make sure the exception isn't caused by calling the function twice.
canvas.toDataURL();
// Calling again inside a layer should throw.
ctx.beginLayer();
assert_throws_dom("InvalidStateError",
() => canvas.toDataURL());
}, "Throws if toDataURL is called while layers are open.");
</script>
</div>
|
