[Webkit-unassigned] [Bug 182090] Some b/w images render black in Safari 11.0.3

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Thu Jan 25 23:45:46 PST 2018


https://bugs.webkit.org/show_bug.cgi?id=182090

--- Comment #4 from Luis Puerto <luiss.puerto at gmail.com> ---
(In reply to Simon Fraser (smfr) from comment #2)
> Page uses srcset:
> 
> <img alt="Charlie Chaplin portrait.jpg"
> src="//upload.wikimedia.org/wikipedia/commons/thumb/3/34/
> Charlie_Chaplin_portrait.jpg/220px-Charlie_Chaplin_portrait.jpg" width="220"
> height="293"
> srcset="//upload.wikimedia.org/wikipedia/commons/thumb/3/34/
> Charlie_Chaplin_portrait.jpg/330px-Charlie_Chaplin_portrait.jpg 1.5x,
> //upload.wikimedia.org/wikipedia/commons/thumb/3/34/Charlie_Chaplin_portrait.
> jpg/440px-Charlie_Chaplin_portrait.jpg 2x" data-file-width="540"
> data-file-height="720">
> 
> but all of those display fine for me.

There are more images where the problem is showing up. All of then are b/w images. I realize this time on a image someone posted on reddit. 

https://www.reddit.com/r/europe/comments/7sm7qz/1_way_to_divide_austria/

The funny thing is... somethings the image is view correctly the first time, but then suddenly, after a fraction or a second, or if I reload the image, the image get black. 
You can see it here: http://g.recordit.co/Gyucnj4bNb.gif

In the wikipedia page happened to me before that first I see the image correctly, then I scroll down and up, and the image turns black. 

If I download the image and I open in preview the image shows up perfectly fine. 

It's a Safari exclusive problem. 

> Luis, can you figure out which image resource is being used on your system,
> and provide a direct URL (or attach the image).

Can you tell me how I can figure out this about the image resource?

(In reply to Simon Fraser (smfr) from comment #3)
> And have you seen this with any other images? What hardware are you on?

I'm on a MacBook Pro (15-inch, Late 2011) 2.5 GHz Intel Core i7 16 GB 1600 MHz DDR3 Intel HD Graphics 3000 512 MB. 
Running macOS High Sierra 10.13.3 (17D47). 

But... the first time I reported this bug (I think like 6 months ago or so, I have to check) I was in El Capitan 10.11.6. 

So... again, I really think it's really related to Safari in some machines.

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