TextOutline works incorrectly

[dmkyr20]

Hey, I have used the textOutput option for my IMSC file, but it doesn't work with two parameters as documented. Furthermore, I know that CSS doesn't have text-outline, but maybe you can use something like this. I have tried this method and the result looks better, as for me. Also, in this case, you can add blur-radius parameter.

imscJS/src/main/js/html.js

Line 1464 in 8d45889

/* emulate text outline */

Thanks :)

[palemieux]

Can you provide a test file, current render and preferred render?

[dmkyr20]

Sure IMSC_textOutline_issue.zip. The IMSC_textOutine_using_shadows file contains emulation ot the textOutline by myself. Using the IMSC_textOutline_using_textOutline file you can see the current render.

Current:

Preferred:

[palemieux]

Thanks. I have seen text outline typically used with white text and surrounded by a small black outline, so we should make sure this new scheme works well in that case.

[palemieux]

@dmkyr20 Does the following capture what you have in mind?

https://codepen.io/palemieux/pen/WNQRqJP

@dkneeland Thoughts on changing tts:textOutline as proposed above?

[dmkyr20]

@palemieux Hi, yes. I think it looks better than the current text outline render

[nigelmegitt]

https://codepen.io/palemieux/pen/WNQRqJP

That looks like a worthwhile improvement to me, especially experimenting with changing the background and foreground colour to be the same, e.g. white/yellow/lime/cyan/red foreground on white or black background.

[palemieux]

@dmkyr20 See PR at #175. Also deployed at http://sandflow.com/imsc1_1/index.html

[dmkyr20]

@palemieux Hey, It looks great. Thanks) Could I ask one more thing. If I add a blur radius for text-outline the text-outline stops working. Could you fix it?

Text-outline documentation: https://www.w3.org/TR/ttml/#style-attribute-textOutline

[palemieux]

@dmkyr20 Thanks for the feedback.

If I add a blur radius for text-outline the text-outline stops working. Could you fix it?

#textOutline-blurred is prohibited in IMSC.

What is the objective of using blur?

[dmkyr20]

@palemieux Oh, sorry. That's my mistake) Thanks for help)