Add offsetX/offsetY settings, respecting backgroundImageAlignment to determine which sides of the image to apply the offset to.

[michelforget]

In a recent blog, your team indicated you could position a background image to your liking. Currently it appears on the very edge of the display (no gap). It would be nice to be able to specify an offsetX/offsetY setting, respecting backgroundImageAlignment to determine which sides of the image to apply the offset to, so that you could indent the image. The idea is that most people will use this to position a large-size icon somewhere in the window to make it super-obvious at a glance which shell is being displayed. Currently to get a gap you need to manually insert a gap around your image, and getting the transparency right isn't necessarily easy.

Proposed technical implementation details (optional)

[zadjii-msft]

This is pretty closely related to #2370. IMO we should just do both all at the same time.

[zadjii-msft]

From @Dominik-H in #12771

I propose adding an option to set padding for background image in settings. While "backgroundImageAlignment" is awesome and works fine for basic image placement adding an option for user to pad their image by requested amount of pixels would allow the user to place the image in any spot in the terminal window.

I am NOT proposing removal of backgroundImageAlignment but an extension option to add padding to image position.

Proposed technical implementation details (optional)

Of course this is up to the implementation team but my proposal is to add parameter similar to the "padding" that positions the text in the terminal.

• Name of the parameter could be "backgroundImagePadding"
• It would accept similar options as mentioned "padding" parameter: "#", "#, #" and "#, #, #, #"
• Default value would be "0, 0, 0, 0"
• When both "backgroundImageAlignment" parameter and new "backgroundImagePadding" are set, the Alignment position would be taken as origin and added to the padding values which would yield new position of the image e.g.: "bottomRight" option is bottom right corner and together with padding of "0, 10, 0, 10" it would calculate position offseting the image by 10 pixels from bottom right corner in both directions.