I made some improvements to the ‘Retina display’ scaling experiment from earlier pull requests: commits 9fd9b95, ea04bfc, 37bb5a8, e5d93ff, 0279cd4 and d731cc5 (these commits are not included in this pull request). The change to #drawPolygon:color:borderWidth:borderColor: in commit ea04bfc is what required fixing issue #14925.

In the extra world opened by OSWorldRendererScalingCanvas example, previously the colors of code critic highlights got muted, that has been fixed now:

You can try it out: create an image in Pharo Launcher using Pharo 12 build 869 as the template, repair the repository ‘pharo’ by cloning from GitHub using ‘Rinzwind’ as the ‘Owner name’ and ‘pharo’ as the ‘Project name’, then check out the branch ‘scaling-canvas-tryout-9’, and do OSWorldRendererScalingCanvas example.

To avoid some issues with extra worlds (issues #14585 and #14817), you can also try using ScalingCanvas for drawing the main world. First do: OSWorldRendererScalingCanvas isApplicable: true. Then save and quit the image, and open it again. Then do: World scaleFactor: 0.5. If you need to revert, do World scaleFactor: 1 and OSWorldRendererScalingCanvas isApplicable: false, then save and reopen.

Hi kris

if this PR depends on ea04bfc then do you have a PR for ea04bfc?

It’s the other way around: commit ea04bfc depends on this pull request but it is not included in this pull request. The only change in this pull request is the move of the assignment to ‘span’ in BalloonEngine (see the ‘Files changed’ tab).

Thanks for the explanation.