[Webkit-unassigned] [Bug 177037] "background-repeat: repeat" incompatible with "image-rendering: pixelated"

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=177037

Karl Dubost <karlcow at apple.com> changed:

           What    |Removed                     |Added
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                 CC|                            |karlcow at apple.com

--- Comment #18 from Karl Dubost <karlcow at apple.com> ---
On https://bugs.webkit.org/show_bug.cgi?id=271774#c1

Some additional findings
There must be a code path which kind of ignore the computation for pixelated? 
Maybe in https://searchfox.org/wubkat/rev/bbfd3d9efcbb9c24abb655b8759ee700ef5d5f34/Source/WebCore/rendering/ImageQualityController.cpp#117



https://codepen.io/chuckskoda/pen/mdgMxBm
This is happening as soon as background-size is going from 100% to 99.9999…%
Interestingly, this is not happening for bigger than 100%. 190% is perfectly pixelated.


For the 1st item.

div {
    width: 128px;
    aspect-ratio: 1;
    image-rendering: pixelated;
    background-repeat: repeat;
    background-size: 100%;
    background-image: url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAgAAAAICAYAAADED76LAAAANElEQVR42mNAAv9RMBr4PzcEGaMoQgggJBE0VAEGxlTQwKACphFshAJkCRBGMYGgIwl6EwBFbk7XYvgRBQAAAABJRU5ErkJggg==);
}



The bluriness starts later:

background-size: 100%; OK
…
background-size: 99.7%; OK
background-size: 99.6%; blurry

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