Grid Capture

Tyler · June 2, 2020, 4:28am

Grid Capture

Screenshot/Recording tool for grid and norns.

Requirements

norns
grid (any size should work, only tested on 128)
Imagemagick installed on norns

Example

local g = grid.connect()
local gcap = require 'GridCapture/GridCapture'

function init()
  g:all(0)
  g:refresh()
  gcap:set_grid(g)
end

function g.key(x,y,z)
  g:led(x,y,15)
  g:refresh()
end

function key(n,z)
  if n == 2 then
    gcap:record(24, 5, 'home/we/image.gif')
  elseif n == 3 then
    gcap:screenshot('home/we/screenshot.png')
  end
end

Github Link

Themes

(p.s. please share any themes you make!)

Justmat · June 3, 2020, 12:26pm

This looks great! My only thought is the yellow is a bit hard to read, something with a little more weight to it might help legibility. Maybe #fff03e or #fff139 if you’re going with yellow?

tyleretters · June 3, 2020, 12:59pm

What does it screenshot?

Justmat · June 3, 2020, 1:01pm

A grid It can take stills of your grid state, like a screenshot, and even record gif’s!

junklight · June 3, 2020, 2:03pm

nice!

+1 on the yellow - kind of hard to read on my laptop screen

Tyler · June 3, 2020, 2:04pm

Yes, it’s hard to replicate the glow of the real thing. I think I’ll go with a more visible yellow as a default. Maybe I could make the colors settable.

GridCaptyure:set_colors(args)

Then I could have a table of themes, that could be unpacked for the args.

tyleretters · June 3, 2020, 2:22pm

Here’s a color combo I’m using for some of my docs.

Tyler · June 4, 2020, 1:45am

first theme,

“bw”

screenshot

tehn · June 4, 2020, 1:52am

this is super rad.

i should get imagemagik into the base norns install

Tyler · June 4, 2020, 2:13am

Also, does anyone know how to cancel os.execute() while it’s in progress? I’d like to effectively Ctrl+C it when I mess up a recording.

tyleretters · June 4, 2020, 3:20am

Oh yeah, this is gorgeous. Amazing work.

csboling · June 4, 2020, 3:25am

Should be possible to use io.popen instead of os.execute, and close() the handle to kill the process.

> handle = io.popen('yes')
<ok>
> handle:read('*line')
y
> handle:read('*line')
y
> ret = {handle:close()}
yes: standard output
: Broken pipe
<ok>
> ret[1]
nil
> ret[2]
exit
> ret[3]
1  -- process exit code, I think?

tehn · June 4, 2020, 8:06am

opposite of cancel but thought you’d be interested;

i made a threaded os command queue, where you can assign a callback per command so it will be non-blocking:

github.com

monome/norns/blob/master/lua/core/norns.lua#L176


else
  norns.version.update = "000000"
end


-- Util (system_cmd)
local system_cmd_q = {}
local system_cmd_busy = false

-- add cmd to queue
norns.system_cmd = function(cmd, callback)
  table.insert(system_cmd_q, {cmd=cmd, callback=callback})
  if system_cmd_busy == false then
    system_cmd_busy = true
    _norns.system_cmd(cmd)
  end
end

-- callback management from c
_norns.system_cmd_capture = function(cap)
  if system_cmd_q[1].callback == nil then print(cap)

delineator · February 12, 2021, 9:28am

Grid capture looks awesome! Is there a similar library for norns screen capture?

kbra · February 12, 2021, 9:43am

It’s got something built in already: help - docs

Tyler · February 12, 2021, 12:34pm

Actually, yes! I was planning to officially release it when I roll grid capture into, but I haven’t touched it in a while. You can get it on github here. It makes use of the clock and the screenshot function that @kbra mentions.

Let me know if you need help getting it to work.

kbra · February 12, 2021, 5:21pm

Oh, yes, I got mixed up (library vs command line functionality in general), sorry Good to hear there’s a library for that as well!