baskerville / sketch

Draw sketches on e-paper

Description

This is a drawing program that is meant to be run on a Kobo e-reader.

It has only been tested on the Glo HD and the Aura ONE.

Installation

First install fmon.

And then issue: unzip sketch.zip -d SD_ROOT.

Usage

Use your fingers to draw.

A short press/release of the power button will:

• Save and clear the canvas if it isn't empty.
• Quit if it's empty.

A long press/release (held more than 2 seconds) of the power button will inverse the displayed colors.

Configuration

If the touch feedback doesn't match the position of your fingers, add the following:

export SKETCH_UNSWAP_XY=1
export SKETCH_UNMIRROR_X=1

in sketch.sh after export PRODUCT….

Building

The OS used on the Kobo devices is Linaro 2011.07.

In order to build for this OS / architecture you can, for example, install Ubuntu LTS 12.04 (the GLIBC version must be old enough) in a VM and install the following package: gcc-4.6-arm-linux-gnueabihf.

Install the appropriate target:

rustup target add arm-unknown-linux-gnueabihf

Append this:

[target.arm-unknown-linux-gnueabihf]
linker = "arm-linux-gnueabihf-gcc"

to ~/.cargo/config.

The binary can then be generated with:

cargo rustc --release --target=arm-unknown-linux-gnueabihf -- -C target-feature=+v7,+vfp3,+a9,+neon

You can tell what features are supported by your device from the output of cat /proc/cpuinfo.

sketch's Issues

How do you like the language so far?

Good to see you picked rust for this project! How is it holding up so far? Do you find it a good language for developing apps for embedded devices like kobo readers?

I have been seriously considering rewrite the core of KOReader with rust for awhile. Mostly the UI loop, but perhaps also the widget system. Maybe we can share some of the code in plato ;)

Open saved files in sketch

It would be nice to have the posiblity of load png files in sketch to review or edit. I think that would make this application, realy interesting.

I am a developer, and I own a kobo glo hd, so I think i can help you to develop this feature.