Resizing from compositor

common/state.h

@@ -58,4 +58,6 @@ struct client_state
     struct xkb_state *xkb_state;
     struct xkb_context *xkb_context;
     struct xkb_keymap *xkb_keymap;
+	int width, height;
+	bool closed;
 };

compositor.c

@@ -1,7 +1,7 @@
 #include "common/shm.h"
 #include "common/state.h"
-#include "pointer.h"
 #include "keyboard.h"
+#include "pointer.h"
 #include "protocols/xdg-shell-client-protocol.h"
 
 #include <assert.h>
@@ -114,6 +114,24 @@ static void wl_surface_frame_done(void *data, struct wl_callback *cb, uint32_t t
     state->last_frame = time;
 }
 
+static void xdg_toplevel_configure(void *data, struct xdg_toplevel *xdg_toplevel, int32_t width, int32_t height,
+                                   struct wl_array *states)
+{
+    struct client_state *state = data;
+    if (width == 0 || height == 0) {
+        /* Compositor is deferring to us */
+        return;
+    }
+    state->width = width;
+    state->height = height;
+}
+
+static void xdg_toplevel_close(void *data, struct xdg_toplevel *xdg_toplevel)
+{
+    struct client_state *state = data;
+    state->closed = true;
+}
+
 static const struct wl_registry_listener wl_registry_listener = {
     .global = registry_handle_global,
     .global_remove = registry_handle_global_remove,
@@ -140,6 +158,11 @@ static const struct wl_callback_listener wl_surface_frame_listener = {
     .done = wl_surface_frame_done,
 };
 
+static const struct xdg_toplevel_listener xdg_toplevel_listener = {
+    .configure = xdg_toplevel_configure,
+    .close = xdg_toplevel_close,
+};
+
 static void wl_buffer_release(void *data, struct wl_buffer *wl_buffer)
 {
     /* Sent by the compositor when it's no longer using this buffer */
@@ -152,7 +175,8 @@ static const struct wl_buffer_listener wl_buffer_listener = {
 
 static struct wl_buffer *draw_frame(struct client_state *state)
 {
-    const int width = 640, height = 480;
+    int width = state->width;
+    int height = state->height;
     int stride = width * 4;
     int size = stride * height;
 
@@ -197,6 +221,8 @@ static struct wl_buffer *draw_frame(struct client_state *state)
 int main(int argc, char *argv[])
 {
     struct client_state state = {0};
+    state.width = 640;
+    state.height = 480;
 
     state.wl_display = wl_display_connect(NULL);
     state.xkb_context = xkb_context_new(XKB_CONTEXT_NO_FLAGS);
@@ -214,6 +240,7 @@ int main(int argc, char *argv[])
     xdg_surface_add_listener(state.xdg_surface, &xdg_surface_listener, &state);
 
     state.xdg_toplevel = xdg_surface_get_toplevel(state.xdg_surface);
+    xdg_toplevel_add_listener(state.xdg_toplevel, &xdg_toplevel_listener, &state);
     xdg_toplevel_set_title(state.xdg_toplevel, "Example client");
     wl_surface_commit(state.wl_surface);