Implement screenshots in show

[adam-urbanczyk]

I had to implement something quickly for my slides, I think it'll be quite useful for others.

• png screenshot
• tune camera position, zoom, bg, wxh, ...
• tender off-screen when non-interactive
• test

Note that offscreen rendering does not work in CI with the exception of mac - that's why the test is dummy.

[jmwright]

Is it normal to get a different view in the PNG than I see in the window?

Window

Output PNG

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.62%. Comparing base (f13f607) to head (a1c4e59).
Report is 2 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1759      +/-   ##
==========================================
+ Coverage   95.33%   95.62%   +0.28%     
==========================================
  Files          28       28              
  Lines        6841     8137    +1296     
  Branches     1025     1305     +280     
==========================================
+ Hits         6522     7781    +1259     
- Misses        194      222      +28     
- Partials      125      134       +9     

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[adam-urbanczyk]

I don't think so. I don't see such issues.

[jmwright]

I don't know if it makes a difference, but I'm on Debian 12 x84_64.

[adam-urbanczyk]

Would you be able to provide a MRE? If there is nothing obvious, I'd still propose to merge this and add a note in the docs.

[adam-urbanczyk]

On win I use

show(box(1,1,1), screenshot='img.png', interact=False, width=400, height=400, gradient=False, trihedron=False)

and that results in:

this is what I get in the window

[jmwright]

I wonder if there is a timing aspect to it. I cannot reproduce the issue that I had yesterday.

[adam-urbanczyk]

Interesting, did you use interact=False or True?

[jmwright]

I believe I tried it both ways, but I know I started with interact=True. I ran python from the terminal and entered the commands manually that way yesterday. I have tried it both that way and via a script this morning and cannot reproduce.

[adam-urbanczyk]

OK, unless you are able to reproduce it, I propose to park it. I will add a note to the docs anyhow.

[jmwright]

Thanks @adam-urbanczyk

[lorenzncode]

Thanks @adam-urbanczyk , screenshots also working for me.