Source code is slightly more structured than the one expected from a tutorial, but here is no notion of components, any entity defined here is just some sounding abstraction over the Wayland and EGL APIs
The application shows the basic operation of connecting to a wayland display and obtaining a reference to the plugin registry for then creating a window which can be painted via EGL / OpenGL ES
The Wayland display is the basic entrypoint for the APIs
The plugin registry enlists the extra protocols available on the system for enriching the Wayland architecture
Wayland itself offers only the base framework, any feature usually expected from a graphics/GUI library is delegated to such plugins
examples used in the code too are
XDG cross desktop graphics ?
extends the basic mechanics of surfaces/subsurfaces nested and overlapping with semantic roles for them ( window-toplevel cursor/tooltip/popup-overlays )
wl_output
info about displays/output devices ( physical? )
OpenGL is the first and most famous of the graphics APIs
allows the user to work with the graphics card by the means of a state machine
uploading/downloading data ( vertex/mesh, color/texture, program/shader, generic raw )
issuing commands
setting flags
it comes in various flavors, the most commons are OpenGL and OpenGL ES ( Embedded Systems )
EGL is the ??? underlying OpenGL and the other Khronos standards
Wayland-EGL
non so bene cos'è
ma offre delle funzioni per accomodare gli oggetti di wayland alle risorse che EGL si aspetta per iniziallizare roba
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