"Hello World" Triangle with Wayland

This application demonstrates on how to draw colorful triangle on Wayland. It uses OpenGL as the rendering machine.

Requirements

wayland-client >= 1.22.0
egl >= 1.7.0
wayland-egl >= 1.22.0
opengl >= 3.x

meson >= 1.3.0

How to build

Run this command below

meson setup <build_directory>
meson compile -C <build_directory>

<build_directory> specifies the location to put the executable

How to run

Suppose the <build_directory> is located on ./build then to run the program:

./build/triangle-wayland-opengl

To output debug of Wayland, add environment variable WAYLAND_DEBUG=1:

WAYLAND_DEBUG=1 ./build/triangle-wayland-opengl

Changing background color

You can change the background color at line 146. Within the values ranging from 0.0F to 1.0F, set the first, second, third parameter as you please to change the red, green, blue intensity respectively.

Example: Set background color to black

glClearColor(0.0F, 0.0F, 0.0F, 1.0F)

Triangle Demo