OpenGL performance overlay for Linux, macOS, *BSD and Illumos

• only build-time dependency is a C99 compliant compiler
• supports legacy OpenGL (1.1), making it compatible with a wide variety of old GPUs
• made with cross-platform support in mind, currently works on 7 different operating systems

simpleoverlay can be configured with the following environment variables

• SCALE
• HORIZONTAL_POS
• VERTICAL_POS
• BG_COLOR
• KEY_COLOR
• VALUE_COLOR
• RAINBOW
• METRICS
• NO_GRAPH
• FPS_ONLY

You can modify them in the simpleoverlay wrapper file

git clone https://github.com/tranarchy/simpleoverlay
cd simpleoverlay
./build.sh
sudo ./build.sh install

For 32-bit game support (such as HL2) you will need to run

./build.sh multilib
sudo ./build.sh install_multilib

You will need a compiler that can compile for 32-bit, on Linux you can install gcc-multilib

You will also need to uncomment the line in simpleoverlay that adds the 32-bit file to LD_PRELOAD

simpleoverlay glxgears

For Steam games

simpleoverlay %command%

To get CPU temp on FreeBSD you need to load either coretemp (for Intel) or amdtemp (for AMD)

sysrc -f /etc/rc.conf kld_list+=coretemp
service kld restart