| <!DOCTYPE html> |
| <meta charset="UTF-8"> |
| <title>background-position composition</title> |
| <link rel="help" href="https://drafts.csswg.org/css-backgrounds-3/#background-position"> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="/css/support/interpolation-testcommon.js"></script> |
| <style> |
| .target { |
| width: 120px; |
| height: 120px; |
| display: inline-block; |
| background-image: url(), url(); |
| } |
| </style> |
| <body> |
| <script> |
| test_composition({ |
| property: 'background-position', |
| underlying: '40px 140px', |
| addFrom: '60px 160px', |
| addTo: '160px 260px', |
| }, [ |
| {at: -0.25, expect: '75px 275px'}, |
| {at: 0, expect: '100px 300px'}, |
| {at: 0.25, expect: '125px 325px'}, |
| {at: 0.5, expect: '150px 350px'}, |
| {at: 0.75, expect: '175px 375px'}, |
| {at: 1, expect: '200px 400px'}, |
| {at: 1.25, expect: '225px 425px'}, |
| ]); |
| |
| test_composition({ |
| property: 'background-position', |
| underlying: 'top 20% left 40%', |
| addFrom: 'left 60% top 80%', |
| addTo: 'right 80% bottom 40%', |
| }, [ |
| {at: -0.25, expect: '110% 105%'}, |
| {at: 0, expect: '100% 100%'}, |
| {at: 0.25, expect: '90% 95%'}, |
| {at: 0.5, expect: '80% 90%'}, |
| {at: 0.75, expect: '70% 85%'}, |
| {at: 1, expect: '60% 80%'}, |
| {at: 1.25, expect: '50% 75%'}, |
| ]); |
| |
| test_composition({ |
| property: 'background-position', |
| underlying: 'top 20% left 40%', |
| addFrom: 'left 60% top 80%, top 180% left 160%', |
| addTo: 'right 80% bottom 40%', |
| }, [ |
| {at: -0.25, expect: '110% 105%, 235% 230%'}, |
| {at: 0, expect: '100% 100%, 200% 200%'}, |
| {at: 0.25, expect: '90% 95%, 165% 170%'}, |
| {at: 0.5, expect: '80% 90%, 130% 140%'}, |
| {at: 0.75, expect: '70% 85%, 95% 110%'}, |
| {at: 1, expect: '60% 80%, 60% 80%'}, |
| {at: 1.25, expect: '50% 75%, 25% 50%'}, |
| ]); |
| |
| test_composition({ |
| property: 'background-position', |
| underlying: '40px 140px', |
| replaceFrom: '100px 200px', |
| addTo: '160px 260px', |
| }, [ |
| {at: -0.25, expect: '75px 150px'}, |
| {at: 0, expect: '100px 200px'}, |
| {at: 0.25, expect: '125px 250px'}, |
| {at: 0.5, expect: '150px 300px'}, |
| {at: 0.75, expect: '175px 350px'}, |
| {at: 1, expect: '200px 400px'}, |
| {at: 1.25, expect: '225px 450px'}, |
| ]); |
| |
| test_composition({ |
| property: 'background-position', |
| underlying: '40px 140px', |
| addFrom: '60px 160px', |
| replaceTo: '200px 400px', |
| }, [ |
| {at: -0.25, expect: '75px 275px'}, |
| {at: 0, expect: '100px 300px'}, |
| {at: 0.25, expect: '125px 325px'}, |
| {at: 0.5, expect: '150px 350px'}, |
| {at: 0.75, expect: '175px 375px'}, |
| {at: 1, expect: '200px 400px'}, |
| {at: 1.25, expect: '225px 425px'}, |
| ]); |
| </script> |
| </body> |
