fastfetch/src/detection/displayserver/linux/displayserver_linux.c

#include "displayserver_linux.h"

#ifdef __FreeBSD__
    #include "common/settings.h"
#endif

void ffConnectDisplayServerImpl(FFDisplayServerResult* ds)
{
    if (instance.config.general.dsForceDrm == FF_DS_FORCE_DRM_TYPE_FALSE)
    {
        //We try wayland as our preferred display server, as it supports the most features.
        //This method can't detect the name of our WM / DE
        ffdsConnectWayland(ds);

        //Try the x11 libs, from most feature rich to least.
        //We use the display list to detect if a connection is needed.
        //They respect wmProtocolName, and only detect display if it is set.

        if(ds->displays.length == 0)
            ffdsConnectXcbRandr(ds);

        if(ds->displays.length == 0)
            ffdsConnectXrandr(ds);

        if(ds->displays.length == 0)
            ffdsConnectXcb(ds);

        if(ds->displays.length == 0)
            ffdsConnectXlib(ds);
    }

    //This display detection method is display server independent.
    //Use it if all connections failed
    if(ds->displays.length == 0)
        ffdsConnectDrm(ds);

    #ifdef __FreeBSD__
    if(ds->displays.length == 0)
    {
        FF_STRBUF_AUTO_DESTROY buf = ffStrbufCreate();
        if (ffSettingsGetFreeBSDKenv("screen.width", &buf))
        {
            uint32_t width = (uint32_t) ffStrbufToUInt(&buf, 0);
            if (width)
            {
                ffStrbufClear(&buf);
                if (ffSettingsGetFreeBSDKenv("screen.height", &buf))
                {
                    uint32_t height = (uint32_t) ffStrbufToUInt(&buf, 0);
                    ffdsAppendDisplay(ds, width, height, 0, 0, 0, 0, NULL, FF_DISPLAY_TYPE_UNKNOWN, false, 0);
                }
            }
        }
    }
    #endif

    //This fills in missing information about WM / DE by using env vars and iterating processes
    ffdsDetectWMDE(ds);
}