Transparency issue on IE with BlendColor filter

[neirda]

Version

2.0

Test Case

https://jsfiddle.net/w2kdcs21/7/

Steps to reproduce

Open the jsfiddle in IE or Edge
It uses the filter BlendColor to make the image blue.

Expected Behavior

The transparent area of the PNG should remain transparent.

Actual Behavior

The transparent area of the PNG is not fully transparent anymore and a part of the red square is now pink.

PS: It's my first report and I wanted to thank you for this great tool !

[asturur]

I have to check it. I have not my windows VM right now.

[ncou]

why don't you use a multiplay or overlay mode ?

[neirda]

I don't know what you mean by "multiplay"
There is the same issue with the overlay mode, it's just more or less visible according the color.

[ncou]

i wanted to say "multiply" and not "multiplay", it's another blend mode, but here is what i get with the mode "tint" for the color = green applyed on the logo img :

it looks like the green is added on the alpha channel, so we get yellow color (it's the sum of red+green) if the alpha part are over the red rect behind. The alpha value seems ignored when the two objects intersect.

[asturur]

I think there is a parameter to choose between opacity or not. Please give a look at filter properties or docs, and let me know if is not stated anywhere 2018-02-14 22:06 GMT+01:00 ncou <notifications@github.com>:

…

i wanted to say "multiply" and not "multiplay", it's another blend mode, but here is what i get with the mode "tint" for the color = green applyed on the logo img : [image: image] <https://user-images.githubusercontent.com/16743322/36227796-848d311c-11d2-11e8-96b9-f098d48b81cf.png> it looks like the green is added on the alpha channel, so we get yellow color if the alpha part are over the red rect behind. The alpha value seems ignored when the two objects intersect. — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#4715 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/ABI4QNiFai1atADQG3EFFElgW3kUfKGbks5tU0rEgaJpZM4SDY06> .

[asturur]

The opacity of source image should be taken in consideration. Probably a bug 2018-02-15 0:39 GMT+01:00 Andrea Bogazzi <andreabogazzi79@gmail.com>:

…

I think there is a parameter to choose between opacity or not. Please give a look at filter properties or docs, and let me know if is not stated anywhere 2018-02-14 22:06 GMT+01:00 ncou ***@***.***>: > i wanted to say "multiply" and not "multiplay", it's another blend mode, > but here is what i get with the mode "tint" for the color = green applyed > on the logo img : > > [image: image] > <https://user-images.githubusercontent.com/16743322/36227796-848d311c-11d2-11e8-96b9-f098d48b81cf.png> > > it looks like the green is added on the alpha channel, so we get yellow > color if the alpha part are over the red rect behind. The alpha value seems > ignored when the two objects intersect. > > — > You are receiving this because you commented. > Reply to this email directly, view it on GitHub > <#4715 (comment)>, > or mute the thread > <https://github.com/notifications/unsubscribe-auth/ABI4QNiFai1atADQG3EFFElgW3kUfKGbks5tU0rEgaJpZM4SDY06> > . >

[asturur]

Have a PR for this, coming back later