Sketch

[baskerville]

I've written an alternative to Sketch Pad called Sketch.

It was tested on the Glo HD and the Aura ONE (firmware 4.3.9084).

The advantages over *Sketch Pad* are:

• The entire display is used.
• There's less latency.
• The strokes are thinner.

[Nemo1984]

I tried it with pbchess launcher. It didn't work.

[baskerville]

I personally use a modified version of koreader.sh as the launch script (and fmon as the launcher).

Please also note that there's no UI: all the meta-operations are performed with the power button.

[kido.resuri]

What are the advantages over the "stock" sketch app?
Please post what firmware version did you made it for.

[baskerville]

Originally Posted by kido.resuri

What are the advantages over the "stock" sketch app?
Please post what firmware version did you made it for.

I've added the answers in the original post.

[kido.resuri]

Nice work, didn't test it tho. Any plans of writing other apps for Kobo?
Would be nice to see.

[Nemo1984]

Originally Posted by baskerville

It only works in 16-bit mode.

I personally use a modified version of koreader.sh as the launch script (and fmon as the launcher).

Please also note that there's no UI: all the meta-operations are performed with the power button.

Could you share your method please? I didn't get around fmon yet.

[baskerville]

Originally Posted by kido.resuri

Nice work, didn't test it tho. Any plans of writing other apps for Kobo?

I'd like to write a reader using sketch as a starting point.

[baskerville]

Originally Posted by Nemo1984

Could you share your method please? I didn't get around fmon yet.

I've added installation instructions to my fmon rewrite and to sketch itself.

[tshering]

I do not know whether sketch is expected to work on Kobo Touch. I am just reporting that it does not show any drawings on the screen. It does however create drawing-date_time.png files (EDIT: the show only a white screen).

It is in 16-bit mode

[root@(none) ~]# fbset

mode "800x600-0"
        # D: 0.033 MHz, H: 0.034 kHz, V: 0.055 Hz
        geometry 800 600 800 1280 16
        timings 30000000 8 164 4 18 4 1
        accel false
        rgba 5/11,6/5,5/0,0/0
endmode

[baskerville]

Originally Posted by tshering

I do not know whether sketch is expected to work on Kobo Touch.

Thank you for reporting. I believe it might have something to do with the touch protocol used by the Touch. I'm only handling ABS_MT_POSITION_{X,Y} and the Touch might be emitting ABS_{X,Y} instead.

I've attached a debug version of Sketch that prints evdev events on standard output. Could you try that version and do something like:

1. First finger down, second finger down.
2. Move both fingers.
3. Release first finger then second finger.

And post the content of crash.log?

[tshering]

Here is the crash.log file.

[baskerville]

Thanks, it was very useful: I didn't realize that both of my test devices were using what koreader refers to as the phoenix touch protocol. And according to koreader/frontend/device/kobo/device.lua, most of the devices are using this protocol.

I've added support for the old protocol in the version attached in the original post. But there might be another problem specific to the Touch: most of the devices have the x and y axes swapped, but koreader sets touch_switch_xy to false by default for the Touch.

Maybe there's a way to tell if a device has the x and y axes swapped based on its PCB?

[Frenzie]

Phoenix is the codename for the Kobo Aura, btw. It was the first device to use that protocol, hence the name.

[tshering]

Originally Posted by baskerville

But there might be another problem specific to the Touch: most of the devices have the x and y axes swapped, but koreader sets touch_switch_xy to false by default for the Touch.

My Touch displays that problem.

Originally Posted by baskerville

Maybe there's a way to tell if a device has the x and y axes swapped based on its PCB?

Maybe. KOReader developers tried to find a way and ended by making the user press the right bottom corner in order to establish whether xy has to be swapped.