Closed
Bug 1363974
Opened 7 years ago
Closed 7 years ago
stylo: Alpha channel of color is rounded incorrectly
Categories
(Core :: CSS Parsing and Computation, defect)
Tracking
()
RESOLVED
DUPLICATE
of bug 1340484
People
(Reporter: xidorn, Unassigned)
References
Details
The following page: <div id="test"></div> <script> test.style.color = 'rgba(0, 0, 0, 0.1)'; alert(getComputedStyle(test).color); </script> shows "rgba(0, 0, 0, 0.098)" in Stylo but "rgba(0, 0, 0, 0.1)" in Gecko. Apparently Stylo's behavior is undesired here. layout/style/test/test_computed_style.html checks this.
Reporter | ||
Comment 1•7 years ago
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Manish, since you are handling color rounding issue recently, I guess you may have some insight to this.
Flags: needinfo?(manishearth)
Comment 2•7 years ago
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Known and being fixed in bug 1340484
Status: NEW → RESOLVED
Closed: 7 years ago
Flags: needinfo?(manishearth)
Resolution: --- → DUPLICATE
I'd note that the Gecko serialization behavior here is quite subtle, and uses different numbers of decimal places depending on what will round-trip correctly. See nsStyleUtil::ColorComponentToFloat.
Comment 4•7 years ago
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Yeah, but these specific numbers are just the rounding behavior (in fact the rounding of 0.1 is how I found the original bug). That alpha value renders differently in servo and gecko. Serializing is another beast, and I have not yet fixed that part. Feel free to reopen this just for the serialization thing.
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Description
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