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Issue 157523002: Fix incorrect animation for some values of background-position. (Closed) Base URL: https://chromium.googlesource.com/chromium/blink.git@backgroundposition
Patch Set: Zoom properly, use interpolation test instead of reftest. Created 6 years, 10 months ago
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1 <!doctype html>
2 <meta charset="utf-8">
3 <style>
4 .target {
5 border: 3px solid skyblue;
6 width: 100px;
7 height: 100px;
8 background-image: linear-gradient(to right, coral, coral);
9 background-size: 20px 20px;
10 background-repeat: no-repeat;
11 display: inline-block;
12 }
13
14 .replica {
15 margin-right: 10px;
16 }
17 </style>
18 <body>
19 <script src="resources/interpolation-test.js"></script>
20 <script>
21
22 // left-top
23 assertInterpolation({
24 property: 'background-position',
25 from: 'center center',
26 to: 'left 20px top 20px',
27 }, [
28 {at: 0, is: '50% 50%'},
29 {at: 0.25, is: 'calc(37.5% + 5px) calc(37.5% + 5px)'},
30 {at: 0.50, is: 'calc(25% + 10px) calc(25% + 10px)'},
31 {at: 0.75, is: 'calc(12.5% + 15px) calc(12.5% + 15px)'},
32 {at: 1, is: '20px 20px'},
33 ]);
34
35 // center-top
36 assertInterpolation({
37 property: 'background-position',
38 from: 'center center',
39 to: 'center top 20px',
40 }, [
41 {at: 0, is: '50% 50%'},
42 {at: 0.25, is: '50% calc(37.5% + 5px)'},
43 {at: 0.50, is: '50% calc(25% + 10px)'},
44 {at: 0.75, is: '50% calc(12.5% + 15px)'},
45 {at: 1, is: '50% 20px'},
46 ]);
47
48 // right-top
49 assertInterpolation({
50 property: 'background-position',
51 from: 'center center',
52 to: 'right 20px top 20px',
53 }, [
54 {at: 0, is: '50% 50%'},
55 {at: 0.25, is: 'calc(37.5% + ((100% - 20px) * 0.25)) calc(37.5% + 5px)'},
56 {at: 0.50, is: 'calc(25% + ((100% - 20px) * 0.5)) calc(25% + 10px)'},
57 {at: 0.75, is: 'calc(12.5% + ((100% - 20px) * 0.75)) calc(12.5% + 15px)'},
58 {at: 1, is: 'calc(100% - 20px) 20px'},
59 ]);
60
61 // left-center
62 assertInterpolation({
63 property: 'background-position',
64 from: 'center center',
65 to: 'left 20px center',
66 }, [
67 {at: 0, is: '50% 50%'},
68 {at: 0.25, is: 'calc(37.5% + 5px) 50%'},
69 {at: 0.50, is: 'calc(25% + 10px) 50%'},
70 {at: 0.75, is: 'calc(12.5% + 15px) 50%'},
71 {at: 1, is: '20px 50%'},
72 ]);
73
74 // center-center
75 assertInterpolation({
76 property: 'background-position',
77 from: 'center center',
78 to: 'center center',
79 }, [
80 {at: 0, is: '50% 50%'},
81 {at: 0.25, is: '50% 50%'},
82 {at: 0.50, is: '50% 50%'},
83 {at: 0.75, is: '50% 50%'},
84 {at: 1, is: '50% 50%'}
85 ]);
86
87 // right-center
88 assertInterpolation({
89 property: 'background-position',
90 from: 'center center',
91 to: 'right 20px center',
92 }, [
93 {at: 0, is: '50% 50%'},
94 {at: 0.25, is: 'calc(37.5% + ((100% - 20px) * 0.25)) 50%'},
95 {at: 0.50, is: 'calc(25% + ((100% - 20px) * 0.5)) 50%'},
96 {at: 0.75, is: 'calc(12.5% + ((100% - 20px) * 0.75)) 50%'},
97 {at: 1, is: 'calc(100% - 20px) 50%'},
98 ]);
99
100 // left-bottom
101 assertInterpolation({
102 property: 'background-position',
103 from: 'center center',
104 to: 'left 20px bottom 20px',
105 }, [
106 {at: 0, is: '50% 50%'},
107 {at: 0.25, is: 'calc(37.5% + 5px) calc(37.5% + ((100% - 20px) * 0.25))'},
108 {at: 0.50, is: 'calc(25% + 10px) calc(25% + ((100% - 20px) * 0.5))'},
109 {at: 0.75, is: 'calc(12.5% + 15px) calc(12.5% + ((100% - 20px) * 0.75))'},
110 {at: 1, is: '20px calc(100% - 20px)'},
111 ]);
112
113 // center-bottom
114 assertInterpolation({
115 property: 'background-position',
116 from: 'center center',
117 to: 'center bottom 20px',
118 }, [
119 {at: 0, is: '50% 50%'},
120 {at: 0.25, is: '50% calc(37.5% + ((100% - 20px) * 0.25))'},
121 {at: 0.50, is: '50% calc(25% + ((100% - 20px) * 0.5))'},
122 {at: 0.75, is: '50% calc(12.5% + ((100% - 20px) * 0.75))'},
123 {at: 1, is: '50% calc(100% - 20px)'},
124 ]);
125
126 // right-bottom
127 assertInterpolation({
128 property: 'background-position',
129 from: 'center center',
130 to: 'right 20px bottom 20px',
131 }, [
132 {at: 0, is: '50% 50%'},
133 {at: 0.25, is: 'calc(37.5% + ((100% - 20px) * 0.25)) calc(37.5% + ((100% - 2 0px) * 0.25))'},
134 {at: 0.50, is: 'calc(25% + ((100% - 20px) * 0.5)) calc(25% + ((100% - 20px) * 0.5))'},
135 {at: 0.75, is: 'calc(12.5% + ((100% - 20px) * 0.75)) calc(12.5% + ((100% - 2 0px) * 0.75))'},
136 {at: 1, is: 'calc(100% - 20px) calc(100% - 20px)'},
137 ]);
138
139 </script>
140 </body>
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