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netBrush is a network based drawing programming, meaning it allows multiple people to draw on the same canvas at the same time. The feature set of netBrush includes a variable sized canvas canvas and a simple brush and airbrush tools, changing brush size, hardness, color, opacity, etc. is possible. You can also record and play back events send to the server as well as manipulate them, for example to scale up an image.

netBrush is based on SDL and doesn't use any external widget libraries, so it should be reasonably portable. In addition to the base SDL library netBrush also uses scons, SDL_net and SDL_image.

Latest version of netBrush can be found at:

• https://github.com/Grumbel/netbrush

Question and comments can go to the author, who is reachable at grumbel@gmail.com.

Compile & Install

mkdir build
cd build
cmake ..
make
make install

Install location can be changed by giving an option to the cmake call:

cmake .. -DCMAKE_INSTALL_PREFIX:PATH=/tmp/bla/run

Usage

netBrush is client/server based, so to make full use of it, you have to start the server first, a simple:

$ ./netbrush-server 4711

will do, 4711 being the port number.

To start the client you have to give it a hostname and a port, like this:

$ ./netbrush-client localhost 4711

You can save the canvas by pressing F5 and you can cause the server to save the event data by sending a "save NAME" to the server port:

$ nc localhost 4711
save mypicture

You can also replay an event log back to the server, to do so use:

$ cat images/nolok-1.nbr | ./scale.rb 1 | nc localhost 4711

Changing the value you give to scale.rb scales the image up or down.