90fa460d2a
they work ok in testing here and get done what I need, any checks or fixes are welcome. * Separate RGBA: Separates an input RGBA image into its R, G, B and A channels * Separate HSVA: Separates an input RGBA image into H, S, V and A channels * Set Alpha: Takes an input RGBA image and an alpha value channel and combines them into a single RGBA image channel. You can also set the alpha for the entire image with the number field when there's no input alpha channel. TODO: Allow input alpha channel with no input image, in order to output a solid colour, with alpha.