Daniel Holbert
47014eccd5
The paint ordering in these tests (of the highlight-background vs. ink of adjacent glyphs) is different in the testcase and reference case, at least in Gecko and WebKit (though not in Chromium[1]). This creates the potential for spurious failures in Gecko and WebKit, if the chosen font happens to have glyphs that draw close together (such that one glyph might have a piece that protrudes to overlap the bounding-box of the next glyph). This patch avoids these spurious failures by explicitly using a monospace font; this reduces the likelihood of glyphs drawing close together and experiencing the sort of overlap that would reveal the paint-order differences between the testcase & reference case. This patch also adds some letter-spacing to one of the testscases; this is needed to fully avoid overlap in the case of an "O" glyph that's adjacent to a highlight and is wide enough in the Windows monospace font to still trigger this problematic overlap (if it weren't for this added letter-spacing). [1] https://issues.chromium.org/issues/465531995 Differential Revision: https://phabricator.services.mozilla.com/D274954
18 lines
316 B
HTML
18 lines
316 B
HTML
<!DOCTYPE html>
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<html>
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<head>
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<style>
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:root {
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font-family: monospace;
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}
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#highlight {
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background-color: yellow;
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color:green;
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}
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</style>
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</head>
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<body>
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One<span id="highlight"> </span>t<span id="highlight">w</span>o three
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</body>
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</html>
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