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Suspiciously blurry rendering when resizing a page containing resized images |
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Issue descriptionOn this page: http://www.70strong.org/about/ the Sequoia Healthcare District" and "Peninsula Family Service" images in the footer at the bottom of the page seem to vary in crispness depending on the size of the browser window, in a way that seems worse than how Safari, FF, and IE are rendering them. The images themselves are being resized (227px width resized down to 100px), but the images do not change size as the browser window resizes, they only move around. So, I'm not sure if we're hitting weird rounding issues in layout, or if this is more of a compositor or Skia thing, so tagging all of the likely components :) I'm not sure if this is WAI or if we're doing worse than we should be, but I thought it'd be good to get someone more knowledgable to take a look.
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Oct 18 2016
What version? What platform? I'm not seeing any issue Linux m54 or Linux ToT. I believe this is WAI but there is agreement that WAI is not good enough, or at least requires web developer action to improve. Chris understands the situation.
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Oct 18 2016
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Oct 18 2016
I was using stable (M53) on Mac and Win, I believe.
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Oct 18 2016
I think the appearance of it looking crisp is an artifact of the ImageQualityController sometimes failing to invalidate again at the end of a resize animation. If you reload the page it goes back to the less-crisp state always for me. Other than that, what might be actionable is the difference in filter algorithm for downsampling used in Firefox vs Chrome. Going to mark that as WontFix, because this has been debated many times and there are lots of tradeoffs for different types of images.
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Oct 18 2016
@chrishtr - I didn't follow the explanation in the first paragraph; why is it sharper during the animation and blurrier otherwise? And why isn't that something that should be fixed? Wouldn't we either for it to be sharper always or blurrier during the animation but sharper otherwise? And, as for the second paragraph, are you suggesting that there are other kinds of images where our filters will produce sharper images than FF?
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Oct 18 2016
It's sharper & pixelier during the animation because we reduce the filter quality. Re second paragraph: higher quality in some cases, yes.
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Oct 18 2016
I see. Thanks!
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Oct 18 2016
No problem. Thanks for filing the bug. Image rendering quality is very very tricky... |
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Comment 1 by e...@chromium.org
, Oct 17 2016