程式語言 - Wayland - Client - Bind Compositor

參考資訊：
https://jan.newmarch.name/Wayland/index.html
https://wayland.freedesktop.org/docs/html/apa.html
https://bugaevc.gitbooks.io/writing-wayland-clients/content/

main.c

#include <stdio.h>
#include <string.h>
#include <wayland-client.h>
  
struct wl_compositor *comp = NULL;
  
void cb_handle(void *dat, struct wl_registry *reg, uint32_t id, const char *intf, uint32_t ver)
{
    if (strcmp(intf, "wl_compositor") == 0) {
        comp = wl_registry_bind(reg, id, &wl_compositor_interface, 3);
    }
}
   
void cb_remove(void *dat, struct wl_registry *reg, uint32_t id)
{
}
   
int main(int argc, char **argv)
{
    struct wl_display *dis = wl_display_connect(NULL);
    struct wl_registry *reg = wl_display_get_registry(dis);
    struct wl_registry_listener cb = {
        .global = cb_handle,
        .global_remove = cb_remove
    };
   
    wl_registry_add_listener(reg, &cb, NULL);
    wl_display_dispatch(dis);
    wl_display_roundtrip(dis);
    printf("comp=0x%08x\n", comp);

    wl_registry_destroy(reg);
    wl_compositor_destroy(comp);
    wl_display_disconnect(dis);
    return 0;
}

編譯、執行

$ gcc main.c -o main -lwayland-client
$ ./main
    comp=0x31be4320