“Make each program do one thing well.” – Unix Philosophy

This program can get and print the monitor width and height, apply optional multipliers, and then print the result to the standard output.

This can be used as base for size-aware resizing of windows.

Compilation

Arch users might like the AUR package.

Compile using gcc and pkg-config:

# Normal compilation
gcc -std=c99 $(pkg-config --cflags gtk+-3.0) -o invo invo.c $(pkg-config --libs gtk+-3.0)

# Optionally compile with a given version string
gcc -std=c99 -Dversion_string=my_cool_version $(pkg-config --cflags gtk+-3.0) -o invo invo.c $(pkg-config --libs gtk+-3.0)

Then copy invo wherever you like.

There is also a provided POSIX compliant shell script that compiles invo.c and tests the result. The script strictly compiles C99 code and warns about anything that isn’t strictly C99 code.

# Strict C99 compilation to `invo`
./compile_strict

# Strict C99 compilation to `foobar`
./compile_strict foobar

This script validates if gcc and pkg-config are available on your machine, and if so, it compiles invo.c.

Usage

The simplest call is just providing either --width or --height (or both) to print the respective information.

% invo --width
3840

% invo --width --height
3840
2160

You can also use a multiplier to change the printed value.

% invo --height 0.5
1080

A full list of options can be shown with the --help parameter.

There is also a Manapage available. The Arch package installs it automatically, otherwise just run man ./invo.1. In case of differences, this readme file has to be seen as the more recent version.