Converting an image to CMYK: unsupported number of components: 4

[steelzeh]

I'm trying to convert a RGB image to CMYK, but i get an error that says: unsupported number of components: 4

When i run this part of the code

  console.log('Width', image.width);
  console.log('Height', image.height);
  console.log('colorModel', image.colorModel);
  console.log('components', image.components);
  console.log('alpha', image.alpha);
  console.log('channels', image.channels);
  console.log('bitDepth', image.bitDepth);

I get this in the console log, and it says components 3:

Width 458
Height 354
colorModel RGB
components 3
alpha 1
channels 4
bitDepth 8

But when i try to do this, it get the error unsupported number of components: 4
var cmykImage = image.cmyk();

Am i doing something wrong? Can't seem to find anything documenting this.

[lpatiny]

Could you give us the full code ?

Here is the testcase we have:

image-js/src/image/transform/__tests__/cmyk.js

Lines 5 to 13 in d3700aa

	let image = new Image(2, 1, [100, 100, 0, 0, 100, 100], { kind: 'RGB' });
	let newImage = image.cmyk();
	expect(newImage.colorModel).toBe('CMYK');
	expect(newImage.bitDepth).toBe(8);
	expect(Array.from(newImage.data)).toStrictEqual([
	0, 0, 255, 155, 255, 0, 0, 155,