[Feature request] get GrayscaleAlpha/LABAlpha on getPixels, + CMYK/multichannel read

Photoshop UXP Plugin API
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1

I use imaging API often in my clients’ projects and it is super useful, especially when it comes to performance, but I really miss two things and I would love to make a request if possible:

1. Alpha for Grayscale/Lab reads. The docs list GrayscaleAlpha and LABAlpha as valid pixelFormat values, but getPixels never produces them - a colorSpace: "Grayscale" read always comes back 1-component with hasAlpha: false, even on a layer with transparency:

const px = await imaging.getPixels({
layerID: layer.id,
componentSize: 8,
applyAlpha: false,
colorSpace: "Grayscale",
});
// pixelFormat: "Grayscale", components: 1, hasAlpha: false (alpha dropped
)

The plain RGBA read on the same layer returns 4 components with alpha, so the data exists - it’s just lost in the grayscale conversion. Could a Grayscale read with applyAlpha: false return GrayscaleAlpha (2 comp) when transparency is present (and Lab LABAlpha)?

same issue was stated in this comment and this topic

2. CMYK / multichannel read. Seconding the earlier ask - direct getPixels access to CMYK and spot/multichannel data would be huge

Thank you!
Evgenii

2

I would very much love that support too. cmyk reads just crash for me, the don’t even fail gracefully. One workaround for writing grayscale / lab images is to make a selection from a pixel mask buffer then delete the transparent pixels with batch play. Currently I am exploring using hybrid uxp/sdk so I can run my gui in js and image processing in c++ ( where you can access transparency and cymk data ) but that adds complexity.