-
Notifications
You must be signed in to change notification settings - Fork 0
/
paint-browser-specific.html
124 lines (104 loc) · 4.36 KB
/
paint-browser-specific.html
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
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8"/>
<meta http-equiv="X-UA-Compatible" content="IE=edge"/>
<title>Painting browser-specific content using Canvas quirks</title>
<style type="text/css">
html, body, canvas {
vertical-align: middle;
}
h1,h2,h3,h4,h5,h6 {
font-family: Helvetica, Helvetica Neue, Arial, sans-serif;
}
canvas {
border: 1px solid black;
display: inline;
margin-right: 10px;
margin-top: 5px;
margin-bottom: 5px;
}
</style>
<script src="paint-tests.js" type="text/javascript"></script>
</head>
<body>
<h1>Painting browser-specific content using Canvas quirks</h1>
<p>
The Canvas below is painted by using Canvas quirks (differences in browser implementations, not whether a feature
is implemented). Each quirk is combined with browser-specific content to be rendered (just text below). They are all
drawn, but Canvas blend modes are used so that only the content for your specific browser is displayed.
</p>
<p>
No browser detection is done, and the Canvases we paint to are never read.
</p>
<canvas id="mainCanvas">
Canvas not supported
</canvas>
<h2>
<a href="/canvas-diff/">Quirks Available</a>
</h2>
<p>
The following is a list of quirks that can be used for detection (currently we only check a subset) and whether they
are present. They are cropped versions of a single draw call (stroke or fill) for a path. For details, please see
a list of <a href="/canvas-diff/">all quirks with code</a>.
</p>
<p>
This works for all tested current browsers as of July 21st, 2014. When I have time available, I'll be submitting
bug reports for these (hopefully they will be all fixed one day!)
</p>
<script type="text/javascript">
var mainCanvas = document.getElementById( 'mainCanvas' );
mainCanvas.width = 600;
mainCanvas.height = 80;
var mainContext = mainCanvas.getContext( '2d' );
function paintText( matcher, text ) {
matcher.paintIfMatches( mainCanvas, mainContext, function( canvas, context ) {
context.fillStyle = '#000';
context.font = '30px Helvetica, Helvetica Neue, Arial, sans-serif';
context.fillText( text, ( mainCanvas.width - context.measureText( text ).width ) / 2, 50 );
} );
}
paintText( matchers.ChromeBlink, 'Chrome or Blink-based (e.g. Opera)' );
paintText( matchers.ChromeWebKit, 'Chrome or Chromium/WebKit-based' );
paintText( matchers.IE9, 'IE9' );
paintText( matchers.IE10Plus, 'IE10+' );
paintText( matchers.FFLinux, 'Firefox, probably on Linux' );
paintText( matchers.FFWinAndroid, 'Firefox, on Windows or Android' );
paintText( matchers.FFOSX, 'Firefox, on Mac OS X' );
paintText( matchers.Safari7Plus, 'Safari 7+ (OS X or iOS) or Chrome-iOS' );
paintText( matchers.Safari6Minus, 'Safari 6.x or OS X <= 10.8' );
var paintExplanations = {
a3pi1piarc: 'Opera ~12',
a2pim1piarc: 'Chrome ~30 (non-iOS), Opera ~17',
a4pim4piarc: 'NOT IE or Opera ~12',
zeroLengthLineJoin: 'NOT FF Win7',
offZeroLineJoin: 'IE',
forwardAndBackQuadratic: 'NOT iOS/OSX Safari/FF or Chrome iOS',
cubicCusp: 'IE, FF Linux/Win7',
cubic4round: 'iOS/OSX Safari, OSX/Linux/Win7 FF, Chrome iOS',
cubic4square: 'iOS/OSX Safari/FF, Chrome iOS, FF Win7',
cubic4squareCorner: 'iOS/OSX Safari/FF, Chrome iOS',
cubic8leftButt: 'IE, Linux/Win7 FF, OS X <=10.8 Safari/FF',
cubic8leftSquare: 'NOT OS X <=10.8 Safari/FF',
cubic10lowerRightButt: 'IE, Linux/Win7 FF',
cubic10topSquare: 'NOT older WebKit (Chrome <=~26, Safari 6, Android Stock/Dolphin 11',
cubic10topButt: 'IE, FF Win7',
miterLinesRight: 'NOT FF Win/Android',
miterLinesUpperLeft: 'FF Linux',
arcSubpathPoints: 'IE9, FF'
};
for ( var key in paintTests ) {
var canvas = document.createElement( 'canvas' );
canvas.width = 1;
canvas.height = 1;
canvas.style.width = '16px';
canvas.style.height = '16px';
var context = canvas.getContext( '2d' );
paintTests[key]( context, '#000' );
document.body.appendChild( canvas );
document.body.appendChild( document.createTextNode( paintExplanations[key] + ' (' + key + ')' ) );
document.body.appendChild( document.createElement( 'br' ) );
}
</script>
</body>
</html>