Why Espruino did not suppert rgba color?

[espruino-discuss]

Posted at 2021-07-01 by tyronehell

Why Espruino did not suppert rgba color?
It's very convenient for UI interface.
Ex:

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Attachments:

• XrTHS.png

[espruino-discuss]

Posted at 2021-07-02 by @gfwilliams

On which platform in particular?

On Bangle.js it's just not possible as it is unable to read back pixels that have been written to the display.

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Posted at 2021-07-03 by tyronehell

yes,thax
Can i read back pixels by using arrayBuffer??

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Posted at 2021-07-03 by @allObjects

nope... the HW is not setup / wired for it.

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Posted at 2021-07-05 by @gfwilliams

If you're creating something with Graphics.createArrayBuffer then yes you can read pixels back, and actually it's already done when drawing antialiased lines/polys/fonts.

So in that case, RGBA could be added. It's just not been worth the extra overhead (it might end up making normal draws slower) when I don't think it would get used much - it's extremely rare you have a device with enough RAM to store a decent size RGB image.