Bug 119080 – [CSS Masking] -webkit-mask-repeat: round does not work

• Component: CSS
• Status: RESOLVED FIXED

[Andrei Parvu]

When using -webkit-mask-repeat with a value of 'round' the image isn't scaled to fit a whole number of times in the background but isn't repeated at all.

Looking through the code, I noticed that everything different from -webkit-mask-repeat: repeat is treated like -webkit-mask-repeat: no-repeat, so the space repeat style is not implemented.

[Andrei Parvu]

Created attachment 207449 [details]
Example of -webkit-mask-repeat: round usage which doesn't work.

[Andrei Parvu]

Created attachment 207633 [details]
Patch

[Dirk Schulze]

Comment on attachment 207633 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=207633&action=review

> Source/WebCore/ChangeLog:7
> +        Added the round functionality to -webkit-mask-repeat.
> +        https://bugs.webkit.org/show_bug.cgi?id=119080
> +

Please add some more lines of comments what you did and how it influenced the bahavior on the dimension calculation code.

> Source/WebCore/rendering/RenderBoxModelObject.cpp:1312
> +    if (backgroundRepeatX == RoundFill && positioningAreaSize.width() > 0 && fillTileSize.width() > 0) {

Doesn't background call the same code path? When it works for background, why doesn't it work for -webkit-mask? If the code exists for background somewhere, we should make sure that we reuse the code.

Do we have tests for background-repeat and "round"?

> Source/WebCore/rendering/RenderBoxModelObject.cpp:1314
> +        int nrTiles = ceil((double)positioningAreaSize.width() /
> +            fillTileSize.width());

why do you split the line here? You don't do it later?

[Andrei Parvu]

Created attachment 207907 [details]
Patch

[Andrei Parvu]

This also fixes the background-repeat. I added background-repeat tests and addressed your comments.

[Dirk Schulze]

Comment on attachment 207907 [details]
Patch

r=me.

[WebKit Commit Bot]

Comment on attachment 207907 [details]
Patch

Clearing flags on attachment: 207907

Committed r153582: <http://trac.webkit.org/changeset/153582>

[WebKit Commit Bot]

All reviewed patches have been landed.  Closing bug.