darktable: Watermarking the photo caption - how?

Software darktable
1

Hi,
I use the latest windows build of darktable.
What do I want to achieve?
I want to imprint the image caption onto the lower part of the exported image.
So I found the watermark function.
I now created a new file “Caption-Text.svg” as copy of simple-text.svg which contains:

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<svg xmlns="http://www.w3.org/2000/svg"
     x="0"
     y="0">

  <text x="0" y="5px" text-anchor="start"
        fill="$(WATERMARK_COLOR)"
        font-family="$(WATERMARK_FONT_FAMILY)"
        font-style="$(WATERMARK_FONT_STYLE)"
        font-weight="$(WATERMARK_FONT_WEIGHT)"
        font-size="10px">$(Xmp.dc.description)</text>
</svg>

I can now choose this new svg in the GUI, but sadly it does not work. It does display “$(WATERMARK_TEXT)” as if I was still using the simple-text.svg.

Any hints?

2

How can $(WATERMARK_TEXT) be displayed since you do not have this in your SVG?

Just tested on Linux, using your caption-text.svg I have no output if my description is empty and otherwise I do have the description appearing as watermark. So looks iike something wrong on your side. We need more information to help.

3

I was wondering the exact same. I now deleted the svg file and recreated it without capital letters as “caption-text.svg”. Now it works. Even if I rename it to capitals again. So I can not recreate the issue now. Lets hope it doesn’t come back.
Anyhow what still doesnt work now is the font choosing. Using the above caption-text.svg it does display the description always in a sort of default font, regardless what I choose in the GUI.
Only once I type at least one letter into the “Text” field in the GUI, it immediately changes to the chosen font. Is that how it works on Linux as well?

4

Yes changing fonts works for me on GNU/Linux.

5

Thanks for the feedback.