Is there a built in way to create an ImageBitmap from an array of rgba values?

# compose

[eygraber]

Is there a built in way to create an ImageBitmap from an array of rgba values?

[Timo Drick]

You can use the normal android Bitmaps which support that. Nothing special in Compose here.

Bitmap.createBitmap(rgbaArray, width, height, config).asImageBitmap()

[eygraber]

I'm using the multiplatform version of Compose, and trying to recreate this - https://medium.com/@bantic/hand-coding-a-color-wheel-with-canvas-78256c9d7d43

[Timo Drick]

Unfortunatley in Compose for Desktop you have to use the Skia library for bitmap handling.

[Timo Drick]

There is Image.makeFromEncoded(bytes) but this expects an compressed image format.

[Timo Drick]

You could use BufferedImage from Swing but i think this is not so good performance like skia.

[Timo Drick]

@eygraber You know that you can also draw canvas in Compose?

[Timo Drick]

https://github.com/timo-drick/compose_dev_challenge_2/blob/main/app/src/main/java/com/example/androiddevchallenge/MainActivity.kt

[eygraber]

Yup, I solved it using drawOval for each Pixel. Thanks 😅