| <!doctype html> |
| <title>CSS url() reference filters may taint the canvas: not tainting</title> |
| <script src="../../resources/testharness.js"></script> |
| <script src="../../resources/testharnessreport.js"></script> |
| <svg style="display: block; width: 0; height: 0"> |
| <defs> |
| <filter id="merge-clean"> |
| <feColorMatrix type="matrix" values="0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 0 1" /> |
| <feMerge> |
| <feMergeNode></feMergeNode> |
| <feMergeNode in="SourceGraphic"></feMergeNode> |
| <feMergeNode in="SourceAlpha"></feMergeNode> |
| <feMergeNode in="FillPaint"></feMergeNode> |
| <feMergeNode in="StrokePaint"></feMergeNode> |
| </feMerge> |
| </filter> |
| <circle id="circle" r="100" fill="blue" /> |
| </defs> |
| </svg> |
| <script> |
| function assert_not_tainted(performCommands, description) { |
| let ctx = document.createElement('canvas').getContext('2d'); |
| performCommands(ctx); |
| assert_not_equals(ctx.getImageData(0, 0, 1, 1), null, description); |
| } |
| |
| // SVG reference filters taint the canvas according to |
| // https://drafts.fxtf.org/filter-effects/#tainted-filter-primitives |
| |
| test(function() { |
| assert_not_tainted(ctx => { |
| ctx.filter = 'url(#merge-clean)'; |
| ctx.fillRect(5, 5, 10, 10); |
| }, 'url(#merge-clean)'); |
| |
| assert_not_tainted(ctx => { |
| ctx.filter = 'blur(5px) url(#merge-clean) blur(5px)'; |
| ctx.fillRect(5, 5, 10, 10); |
| }, 'blur(5px) url(#merge-clean) blur(5px)'); |
| }); |
| </script> |
