What version of astro are you using?

1.1.5

Are you using an SSR adapter? If so, which one?

None

What package manager are you using?

pnpm

What operating system are you using?

Windows WSL2

Describe the Bug

@astrojs/image version: 0.5.0

When trying to generate an optimized version of a transparent PNG image with black contents (for instance a logo) in a format that doesn't support transparency, the background becomes black and the content becomes invisible.

This is because there is no option to set the background color when the alpha channel is lost due to format conversion.

Link to Minimal Reproducible Example

https://github.com/beeb/astrojs-image-repro

Participation

• I am willing to submit a pull request for this issue.

Suggestion

Add a background prop to be passed to sharp's flatten method.