Take screenshot from Kobo

[koenieee]

Thanks to this link: http://www.cnx-software.com/2010/07/...er-screenshot/
we can make screenshot from our Kobo screen.

* requires telnet

run this command:

cat /dev/fb0 > screen.raw

get the screen.raw via ftp to you local computer that's running PERL.

Create a new perl script with this contents:

#!/usr/bin/perl -w

$w = shift || 240;
$h = shift || 320;
$pixels = $w * $h;

open OUT, "|pnmtopng" or die "Can't pipe pnmtopng: $!\n";

printf OUT "P6%d %d\n255\n", $w, $h;

while ((read STDIN, $raw, 2) and $pixels--) {
   $short = unpack('S', $raw);
   print OUT pack("C3",
      ($short & 0xf800) >> 8,
      ($short & 0x7e0) >> 3,
      ($short & 0x1f) << 3);
}

close OUT;

Chmod +x FILE.sh

after that run this:
change the resolution to your Kobo screen (I have a kobo Glo)

./FILE.SH 1024 758 < screen.raw > screen.png

And there you go, screen.png contains you Kobo Sreenshot.

[RoninTech]

Good one!

[stewacide]

Someone with telnet set up, you could use this technique to determine the Kobo Glo's maximum native image size and forward this information onto the Calibre developers in order to create an optomized Kobo Glo output profile.

[ichrispa]

I'm triggering the following script via an integrated webserver on the kobo touch... screenshots directly to the desktop ^^

#!/mnt/onboard/.local/bin/python

import png
import struct

RAWD = "/mnt/onboard/.local/tmp/screenshot.raw"

# create a raw image
fb = open("/dev/fb0", b"r")
rawf = open(RAWD, b"w")
rawf.write(fb.read(1089536))
rawf.close()

rawf = open(RAWD, b"r")
pngf = open("/mnt/onboard/.local/tmp/screenshot.png", "w")

rawpng_flat = []
rawpng = []
pixel = []

data = rawf.read(2)
print "Screen data aquired"

while data != "":
r5 = (struct.unpack("H", data)[0] >> 11) & 0x1F
g6 = (struct.unpack("H", data)[0] >> 5) & 0x3F
b5 = (struct.unpack("H", data)[0]) & 0x1F
r8 = (r5<<3)+(r5>>2)
g8 = (g6<<2)+(g6>>4)
b8 = (b5<<3)+(b5>>2)

rawpng_flat += [r8%256, g8%256, b8%256]
data = rawf.read(2)

print "Writing Screenshot"
png.Writer(width=800,height=600,bitdepth=8).write_ array(pngf, rawpng_flat)

pngf.close()
rawf.close()

[ibu]

Is there any easy-to-use-script for the Kobo Glo to get a screenshot directly to the desktop or a configurable folder on a pc?
I have no experience with the console at all.

Or is there a calibre plugin which "pulls" a screenshot?
Thanks.

[davidfor]

If you look at https://www.mobileread.com/forums/sho...d.php?t=218376, one of the options is a screenshot. When you add:

[FeatureSettings]
Screenshots=true

Pressing the power button will take a screen shot. This is stored as a JPEG in the root directory of the device. You can copy that from the device the next time you connect to the PC. They will also get added to the device library the next time new books are processed.

[ibu]

@davidfor

Thanks! Works perfectly!

[diane55]

Originally Posted by davidfor

If you look at https://www.mobileread.com/forums/sho...d.php?t=218376, one of the options is a screenshot. When you add:

[FeatureSettings]
Screenshots=true

Pressing the power button will take a screen shot. This is stored as a JPEG in the root directory of the device. You can copy that from the device the next time you connect to the PC. They will also get added to the device library the next time new books are processed.

This tweak does'nt work anymore with the version 3.3.0. It's a pity !

[Markismus]

If you use koreader and the multi touch modification, you can also take a screenshot inside koreader by pressing both diagonal corners.
It creates a pam-file in koreader/screenshots, which can be viewed and converted with a program like Imagemagick.

[soulpixel]

Originally Posted by Markismus

If you use koreader and the multi touch modification, you can also take a screenshot inside koreader by pressing both diagonal corners.
It creates a pam-file in koreader/screenshots, which can be viewed and converted with a program like Imagemagick.

I have koreader installed, how do I enable the multitouch functionality ? Right now pressing diagonal corners doesn't create the screenshots :-(

[trekk]

Originally Posted by soulpixel

I have koreader installed, how do I enable the multitouch functionality ? Right now pressing diagonal corners doesn't create the screenshots :-(

Just swipe from bottom left to upper corner right. This will create a screenshot, which can be found in koreader/screenshots.

[ebrahimpak]

Even Gimp doesn't open .pam files in windows. What program do you recommend for opening such file formats in Windows?

[trekk]

You can use ImageMagick to open .pam files. http://www.imagemagick.org/script/bi...es.php#windows

[JimMcLaren]

Paint.net with the plugin found here works fine too.

[ebrahimpak]

Thank you everybody. Now it sometimes takes screenshots and sometimes doesn't! When e.g. I wanna take a screenshot from the opened dictionary, it doesn't take any snapshots.