Intent to Remove: CanvasRenderingContext2D.webkitImageSmoothingEnabled

xl...@chromium.org

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Jul 11, 2016, 11:11:24 AM7/11/16

to blink-dev

Primary eng (and PM) emails

ju...@chromium.org, xl...@chromium.org

Link to “Intent to Deprecate” thread

https://groups.google.com/a/chromium.org/d/msg/blink-dev/Ud3cV1mj35s/Ssat21OeRqYJ

Summary

Remove the attribute boolean webkitImageSmoothingEnabled on CanvasRenderingContext2D.

webkitImageSmoothingEnabled is true per default, setting it to false disables interpolation.

Motivation

It's an alias of the unprefixed imageSmoothingEnabled.

Compatibility Risk

Content that sets webkitImageSmoothingEnabled but not imageSmoothingEnabled will get interpolated.

This function has been deprecated since M41. Its unprefixed alias has been shipped since M30.

Firefox and IE supports this feature with vendor-specific prefix.

Usage information from UseCounter

Prefixed: https://www.chromestatus.com/metrics/feature/timeline/popularity/267

Unprefixed: https://www.chromestatus.com/metrics/feature/timeline/popularity/268

The webkitImageSmoothingEnabled has a usage of 0.009%. Its unprefixed alias

has a usage of 0.03% and is gradually increasing.

OWP launch tracking bug

crbug.com/277199

Entry on the feature dashboard

N/A

Philip Jägenstedt

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Jul 11, 2016, 11:27:23 AM7/11/16

to xl...@chromium.org, blink-dev

LGTM1, but since it has been deprecated for a long time I suggest first changing the deprecation message to say that it will be removed in M55, and then remove after the next branch point.

xlai

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Jul 11, 2016, 2:10:16 PM7/11/16

to Philip Jägenstedt, blink-dev

Good suggestion. CL ready in changing the deprecation message in M54 before removal in M55.

Chris Harrelson

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Jul 12, 2016, 7:32:32 PM7/12/16

to xlai, Philip Jägenstedt, blink-dev

LGTM2

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Rick Byers

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Jul 12, 2016, 8:27:26 PM7/12/16

to Chris Harrelson, xlai, Philip Jägenstedt, blink-dev

LGTM3

Joe Medley

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Jul 14, 2016, 12:34:57 PM7/14/16

to Rick Byers, Chris Harrelson, xlai, Philip Jägenstedt, blink-dev

Could someone familiar with the details create a Chrome Status entry for this?

Joe Medley | Technical Writer, Chrome DevRel | jme...@google.com | 816-678-7195

If an API's not documented it doesn't exist.

xlai

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Jul 14, 2016, 12:54:34 PM7/14/16

to Joe Medley, Rick Byers, Chris Harrelson, Philip Jägenstedt, blink-dev

I created the entry recently: https://www.chromestatus.com/features/5639849247768576

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