| <!DOCTYPE html> |
| <html> |
| <head> |
| <title>cross-fade() computed value</title> |
| <link rel="author" title="Steinar H. Gunderson" href="mailto:[email protected]"> |
| <link rel="help" href="https://drafts.csswg.org/css-images-4/#cross-fade-function"> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="/css/support/computed-testcommon.js"></script> |
| <style> |
| #target { |
| color: red; |
| } |
| </style> |
| </head> |
| <body> |
| <div id="target"></div> |
| <script> |
| // https://drafts.csswg.org/css-images-4/#serialization specifies that |
| // “For cross-fade(), always serialize the <percentage>.”, but it's not clear what |
| // “the” percentage is, since the implicit percentages are different for drawing and |
| // sizing, and may not be known computed-value time, so we assume one that is not |
| // given should also not be serialized. |
| test_computed_value( |
| 'background-image', |
| 'cross-fade(30% color-mix(in srgb, currentcolor, blue), white)', |
| 'cross-fade(color(srgb 0.5 0 0.5) 30%, rgb(255, 255, 255))'); |
| |
| // Unneccessary percentages should be kept. |
| test_computed_value('background-image', 'cross-fade(50% red, 50% green)', |
| 'cross-fade(rgb(255, 0, 0) 50%, rgb(0, 128, 0) 50%)'); |
| |
| // Percentage normalization should not be visible computed-value time. |
| test_computed_value('background-image', 'cross-fade(20% red, 20% green)', |
| 'cross-fade(rgb(255, 0, 0) 20%, rgb(0, 128, 0) 20%)'); |
| |
| // More than two values. |
| test_computed_value('background-image', |
| 'cross-fade(50% red, 50% green, 50% blue)', |
| 'cross-fade(rgb(255, 0, 0) 50%, rgb(0, 128, 0) 50%, rgb(0, 0, 255) 50%)'); |
| |
| // More-than-100% should be invalid, but in calc() we can't reject it parse-time; |
| // it will be clamped on serialization. |
| test_computed_value('background-image', |
| 'cross-fade(calc(101%) red, green)', |
| 'cross-fade(rgb(255, 0, 0) 100%, rgb(0, 128, 0))'); |
| test_computed_value('background-image', |
| 'cross-fade(calc(-200%) red, green)', |
| 'cross-fade(rgb(255, 0, 0) 0%, rgb(0, 128, 0))'); |
| |
| // The percentage here is not resolvable parse-time, but should always be 49% |
| // for all reasonable font sizes. |
| test_computed_value('background-image', |
| 'cross-fade(calc(50% + 1% * sign(1em - 10000px)) red, green)', |
| 'cross-fade(rgb(255, 0, 0) 49%, rgb(0, 128, 0))'); |
| </script> |
| </body> |
| </html> |
