vips_watermark failed when input image has 4 bands

[sanlee42]

If input image is png(which has the alpha channel), watermark will be failed. The error msg is ifthenelse: not one band or 4 bands. Does it means watermark only support for the input image with 3 bands?

[greut]

To fix it, one have to make the compositing manually.

• https://github.com/jcupitt/libvips/issues/657

[yehor-manzhula]

Hi! Is there any news on that? I am really waiting for the fix.

[greut]

@egor-manjula what do you mean by waiting for the fix?

My best guess is that you either have to make it yourself by doing the composition manually, or finding someone able to do so and negociate how many 🍻 or 🍭 they would ask for their trouble.

[yehor-manzhula]

@greut I am really newbie into go lang, just start learning it. I've tried ti find out on what is wrong in the code but failed with that. Coukd you please send me some example on nanual composition or at list send a link, or point ot lines number if they are already exists somewhere.

[greut]

The option one seems out of reach then.

[timotew]

@yehor-manzhula were you able to sole this issue?

[yehor-manzhula]

@timotew Nope.

[timotew]

I converted the image to JPEG fist before adding watermark was the bypass I used.