Steward

分享是一種喜悅、更是一種幸福

掌機 - GKDmini Plus - Wayland Client (xdg-shell) - Create Surface

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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 <stdbool.h>
#include <string.h>
#include <wayland-client.h>
#include <linux/input-event-codes.h>
 
#include "xdg-shell-client-protocol.h"
 
static bool configured = false;
static bool running = true;
  
struct wl_display *dis = NULL;
struct wl_surface *surf = NULL;
struct wl_registry *reg = NULL;
struct wl_compositor *comp = NULL;
struct xdg_surface *xdg_surf = NULL;
struct xdg_toplevel *xdg_toplevel = NULL;
struct xdg_wm_base *xdg_wm_base = NULL;
 
static void xdg_wm_base_handle_ping(void *data, struct xdg_wm_base *xdg_wm_base, uint32_t serial)
{
    xdg_wm_base_pong(xdg_wm_base, serial);
}
 
static const struct xdg_wm_base_listener xdg_wm_base_listener = {
    .ping = xdg_wm_base_handle_ping,
};
  
void cb_handle(void *dat, struct wl_registry *reg, uint32_t id, const char *intf, uint32_t ver)
{
    if (strcmp(intf, wl_compositor_interface.name) == 0) {
        comp = wl_registry_bind(reg, id, &wl_compositor_interface, 1);
    }
    else if (strcmp(intf, xdg_wm_base_interface.name) == 0) {
        xdg_wm_base = wl_registry_bind(reg, id, &xdg_wm_base_interface, 1);
        xdg_wm_base_add_listener(xdg_wm_base, &xdg_wm_base_listener, NULL);
    }
}
      
void cb_remove(void *dat, struct wl_registry *reg, uint32_t id)
{
}
      
struct wl_registry_listener cb = {
    .global = cb_handle,
    .global_remove = cb_remove
};
 
static void xdg_surface_handle_configure(void *data, struct xdg_surface *xdg_surface, uint32_t serial)
{
    xdg_surface_ack_configure(xdg_surface, serial);
 
    if (configured) {
        wl_surface_commit(surf);
    }
 
    configured = true;
}
 
static const struct xdg_surface_listener xdg_surface_listener = {
    .configure = xdg_surface_handle_configure,
};
 
static void xdg_toplevel_handle_close(void *data, struct xdg_toplevel *xdg_toplevel)
{
    running = false;
}
 
static void noop(void *arg0, struct xdg_toplevel *arg1, int32_t arg2, int32_t arg3, struct wl_array *arg4)
{
}
 
static const struct xdg_toplevel_listener xdg_toplevel_listener = {
    .configure = noop,
    .close = xdg_toplevel_handle_close,
};
  
int main(int argc, char **argv)
{
    dis = wl_display_connect(NULL);
    reg = wl_display_get_registry(dis);
  
    wl_registry_add_listener(reg, &cb, NULL);
    wl_display_roundtrip(dis);
    printf("comp = 0x%08x\n", comp);
 
    surf = wl_compositor_create_surface(comp);
    printf("surf = 0x%08x\n", surf);
 
    xdg_surf = xdg_wm_base_get_xdg_surface(xdg_wm_base, surf);
    printf("xdg_surf = 0x%08x\n", xdg_surf);
 
    xdg_toplevel = xdg_surface_get_toplevel(xdg_surf);
    xdg_surface_add_listener(xdg_surf, &xdg_surface_listener, NULL);
    xdg_toplevel_add_listener(xdg_toplevel, &xdg_toplevel_listener, NULL);
 
    xdg_toplevel_destroy(xdg_toplevel);
    xdg_surface_destroy(xdg_surf);
    wl_surface_destroy(surf);
    wl_compositor_destroy(comp);
    wl_registry_destroy(reg);
    wl_display_disconnect(dis);
 
    return 0;
}

編譯

$ /opt/mini/bin/wayland-scanner private-code /opt/mini/arm-buildroot-linux-gnueabihf/sysroot/usr/share/waylandpp/protocols/xdg-shell.xml xdg-shell-protocol.c
$ /opt/mini/bin/wayland-scanner client-header /opt/mini/arm-buildroot-linux-gnueabihf/sysroot/usr/share/waylandpp/protocols/xdg-shell.xml xdg-shell-client-protocol.h
$ arm-linux-gnueabihf-gcc main.c xdg-shell-protocol.c -o test -I/opt/mini/include -lwayland-client

執行

# killall gmenu2x && ./test 
    comp = 0x01d60690
    surf = 0x01d5f480
    xdg_surf = 0x01d5f4b8