Display Image with Pickel (or alternative)

c4software · 01-12-2021, 06:22 PM

Hi,

I have a Kobo Nia and I want to use it as an « Image Viewer (with auto-refresh) », I see many ways to do this, but none seems to work in 2021.

I want to do something really simple like the script « /etc/bin/Kobo/demoloop.sh »

But, if I do from telnet :

Code:

zcat /etc/images/splash.raw.gz  | /usr/local/Kobo/pickel showpic

Nothing happen.

And If I do the same from the NickelMenu, I have glitch on screen (like a rotated screen maybe ?). But nothing more.

If someone have an idea ?

My fbset output :

Code:

[root@kobo ~]# fbset

mode "758x1024-0"
        # D: 0.025 MHz, H: 0.029 kHz, V: 0.028 Hz
        geometry 758 1024 768 1024 32
        timings 40000000 12 76 4 5 12 2
        accel false
        rgba 8/16,8/8,8/0,8/24
endmode

NiLuJe · 01-12-2021, 06:47 PM

Oh, hai!

----

FWIW, pickel's showpic expects a raw framebuffer dump. It also expects it in its own framebuffer state, which never matches Nickel's on recent FW versions. It's usually @16bpp, in a broken and device-specific rotation.

NiMa · 01-12-2021, 08:55 PM

Quote:

Originally Posted by c4software

Hi,

I have a Kobo Nia and I want to use it as an « Image Viewer (with auto-refresh) », I see many ways to do this, but none seems to work in 2021.

I want to do something really simple like the script « /etc/bin/Kobo/demoloop.sh »

But, if I do from telnet :

Code:

zcat /etc/images/splash.raw.gz  | /usr/local/Kobo/pickel showpic

Nothing happen.

And If I do the same from the NickelMenu, I have glitch on screen (like a rotated screen maybe ?). But nothing more.

If someone have an idea ?

My fbset output :

Code:

[root@kobo ~]# fbset

mode "758x1024-0"
        # D: 0.025 MHz, H: 0.029 kHz, V: 0.028 Hz
        geometry 758 1024 768 1024 32
        timings 40000000 12 76 4 5 12 2
        accel false
        rgba 8/16,8/8,8/0,8/24
endmode

As NiLuJe said, his FBInk library would be perfect for this use-case. It is truly a joy to use.

But I ran into issues with Pickel lately (when trying to show Xorg events on screen)... The raw picture wasn't displaying properly and it was distorted. Anyone knowing why? It should work since the Kobo is able to display update/poweron images. Or is it handled internally with another library?

@NiLuJe oh thanks I didn't read the last part of your post. Any way to still be able to display a picture with pickel? Thanks

NiLuJe · 01-12-2021, 09:04 PM

Quote:

Originally Posted by NiMa

@NiLuJe oh thanks I didn't read the last part of your post. Any way to still be able to display a picture with pickel? Thanks

Not easily, no. And it's not a good idea to begin with (performance is terrible, and the fb state constraints make no sense in 99% of cases).

(Also, XOrg *really* doesn't like it if you modify the fb state behind its back).

NiMa · 01-12-2021, 09:06 PM

Quote:

Originally Posted by NiLuJe

Not easily, no. And it's not a good idea to begin with (performance is terrible, and the fb state constraints make no sense in 99% of cases).

(Also, XOrg *really* doesn't like it if you modify the fb state behind its back).

Yeah I think I definitely made the good move by using fbink-xdamage... Pickel is just a curiosity for me

c4software · 01-13-2021, 02:56 AM

Quote:

Originally Posted by NiLuJe

Oh, hai!

----

FWIW, pickel's showpic expects a raw framebuffer dump. It also expects it in its own framebuffer state, which never matches Nickel's on recent FW versions. It's usually @16bpp, in a broken and device-specific rotation.

Annnnd its working 👌Thanks a lot for the fast answer !

Click image for larger version

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PS: Still early wip project.

c4software · 01-13-2021, 10:53 AM

The main idea behind this script is (if its possible)

- Wake up from sleep or similar ? (looks like its not possible)
- Enable & Connect to WiFi
- Download an image from an HTTP Endpoint
- Display the downloaded image (FBink ��)
- Disconnect Wifi
- Put in Sleep or similar (rtcwake maybe…)

As I see a CRON is not a great solution, so I will certainly do a « while true ».

NiMa · 01-13-2021, 11:38 AM

Quote:

Originally Posted by c4software

The main idea behind this script is (if its possible)

1. Wake up from sleep or similar ? (looks like its not possible)
2. Enable & Connect to WiFi
3. Download an image from an HTTP Endpoint
4. Display the downloaded image (FBink ��)
5. Disconnect Wifi
6. Put in Sleep or similar (rtcwake maybe…)

As I see a CRON is not a great solution, so I will certainly do a « while true ».

1. Nickel DBus ?
2. Nickel DBus also
3. wget
4. fbink, yes
5. Nickel DBus also I think.
6. nickeldbus also i think

c4software · 01-13-2021, 12:10 PM

Yes downloading image and display it is pretty straight forward (and classic, not a problem).

I will look for the suspend part with « Nickel DBus ».

Thanks

sherman · 01-13-2021, 02:40 PM

Note, suspend/sleep does not (yet) exist in NickelDBus. It was an oversight I forgot to add. Will be in the next version.

Although, not sure about waking from sleep.

gonzule · 03-02-2024, 04:57 PM

Quote:

Originally Posted by c4software

The main idea behind this script is (if its possible)

- Wake up from sleep or similar ? (looks like its not possible)
- Enable & Connect to WiFi
- Download an image from an HTTP Endpoint
- Display the downloaded image (FBink ��)
- Disconnect Wifi
- Put in Sleep or similar (rtcwake maybe…)

As I see a CRON is not a great solution, so I will certainly do a « while true ».

Hi, did you ever figure these steps out? I am trying to do the EXACT same thing, but my coding skills are very limited.

01-12-2021, 06:22 PM	#1
c4software Junior Member Posts: 4 Karma: 10 Join Date: Jan 2021 Device: Kobo NIA − Kindle PW3	Display Image with Pickel (or alternative) Hi, I have a Kobo Nia and I want to use it as an « Image Viewer (with auto-refresh) », I see many ways to do this, but none seems to work in 2021. I want to do something really simple like the script « /etc/bin/Kobo/demoloop.sh » But, if I do from telnet : Code: zcat /etc/images/splash.raw.gz \| /usr/local/Kobo/pickel showpic Nothing happen. And If I do the same from the NickelMenu, I have glitch on screen (like a rotated screen maybe ?). But nothing more. If someone have an idea ? My fbset output : Code: [root@kobo ~]# fbset mode "758x1024-0" # D: 0.025 MHz, H: 0.029 kHz, V: 0.028 Hz geometry 758 1024 768 1024 32 timings 40000000 12 76 4 5 12 2 accel false rgba 8/16,8/8,8/0,8/24 endmode

01-12-2021, 06:47 PM	#2
NiLuJe BLAM! Posts: 13,477 Karma: 26012492 Join Date: Jun 2010 Location: Paris, France Device: Kindle 2i, 3g, 4, 5w, PW, PW2, PW5; Kobo H2O, Forma, Elipsa, Sage, C2E	Oh, hai! ---- FWIW, pickel's showpic expects a raw framebuffer dump. It also expects it in its own framebuffer state, which never matches Nickel's on recent FW versions. It's usually @16bpp, in a broken and device-specific rotation. Last edited by NiLuJe; 01-12-2021 at 06:58 PM.

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01-13-2021, 10:53 AM	#7
c4software Junior Member Posts: 4 Karma: 10 Join Date: Jan 2021 Device: Kobo NIA − Kindle PW3	The main idea behind this script is (if its possible) - Wake up from sleep or similar ? (looks like its not possible) - Enable & Connect to WiFi - Download an image from an HTTP Endpoint - Display the downloaded image (FBink ��) - Disconnect Wifi - Put in Sleep or similar (rtcwake maybe…) As I see a CRON is not a great solution, so I will certainly do a « while true ».

01-13-2021, 12:10 PM	#9
c4software Junior Member Posts: 4 Karma: 10 Join Date: Jan 2021 Device: Kobo NIA − Kindle PW3	Yes downloading image and display it is pretty straight forward (and classic, not a problem). I will look for the suspend part with « Nickel DBus ». Thanks

01-13-2021, 02:40 PM	#10
sherman Guru Posts: 850 Karma: 2641698 Join Date: Aug 2008 Location: Taranaki - NZ Device: Kobo Aura H2O, Kobo Forma	Note, suspend/sleep does not (yet) exist in NickelDBus. It was an oversight I forgot to add. Will be in the next version. Although, not sure about waking from sleep.