background image loses precision with Window zoomLevel method

[jonwwilkes]

NWJS Version : v0.49.2
Operating System : tested on both Debian Bullseye, Windows 10

Expected behavior

In the attached test, the left edge of the svg rect should align with the CSS background-image vertical gridlines for all values of Window zoomLevel

Actual behavior

At zoomLevel = 3, you can see that the rect is misaligned-- substantial whitespace can be seen between the left edge of the rect and the nearest gridline. You can see similar errors at other zoomLevels

How to reproduce

1. Use the attached test.zip as the main file of an nw.js project

2. When it opens, open devTools

3. nw.Window.get().zoomLevel = 3;

4. Scroll over to the rect at x=3500 and notice that it isn't aligned with the grid lines.

Notes:

• same for this CSS gridline hack as it is for using an SVG pattern to create the grid lines
• the misalignment bug does not exist on Chromium 86 or Chromium 83 for any of the browser zoom levels. Tested on both Debian Bullseye and Windows 10

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.