git clone https://github.com/rehans/xcb-shm-test.git
mkdir build
cd build
cmake -DCMAKE_BUILD_TYPE=Debug ..
cmake --build .
https://stackoverflow.com/questions/27745131/how-to-use-shm-pixmap-with-xcb
git clone https://github.com/rehans/xcb-shm-test.git
mkdir build
cd build
cmake -DCMAKE_BUILD_TYPE=Debug ..
cmake --build .
https://stackoverflow.com/questions/27745131/how-to-use-shm-pixmap-with-xcb