Wayland: throttle resize operations also for top-level GL windows

Member cb of struct wld_buffer is replaced by member frame_cb of struct wld_window.
This allows frame_cb to be used both for non-GL and for top-level GL windows.

1 files changed, 17 insertions, 0 deletions

diff --git a/src/drivers/Wayland/Fl_Wayland_Gl_Window_Driver.cxx b/src/drivers/Wayland/Fl_Wayland_Gl_Window_Driver.cxx
index aec93283b..473afd810 100644
--- a/src/drivers/Wayland/Fl_Wayland_Gl_Window_Driver.cxx
+++ b/src/drivers/Wayland/Fl_Wayland_Gl_Window_Driver.cxx
@@ -397,6 +397,18 @@ static void delayed_scissor(Fl_Wayland_Gl_Window_Driver *dr) {
 }*/
 
 
+static void surface_frame_done(void *data, struct wl_callback *cb, uint32_t time) {
+  struct wld_window *xid = (struct wld_window *)data;
+  wl_callback_destroy(cb);
+  xid->frame_cb = NULL;
+}
+
+
+static const struct wl_callback_listener surface_frame_listener = {
+  .done = surface_frame_done,
+};
+
+
 void Fl_Wayland_Gl_Window_Driver::resize(int is_a_resize, int W, int H) {
   if (!egl_window) return;
   float f = Fl::screen_scale(pWindow->screen_num());
@@ -406,6 +418,11 @@ void Fl_Wayland_Gl_Window_Driver::resize(int is_a_resize, int W, int H) {
   int W2, H2;
   wl_egl_window_get_attached_size(egl_window, &W2, &H2);
   if (W2 != W || H2 != H) {
+    struct wld_window *xid = fl_wl_xid(pWindow);
+    if (xid->kind == Fl_Wayland_Window_Driver::DECORATED && !xid->frame_cb) {
+      xid->frame_cb = wl_surface_frame(xid->wl_surface);
+      wl_callback_add_listener(xid->frame_cb, &surface_frame_listener, xid);
+    }
     wl_egl_window_resize(egl_window, W, H, 0, 0);
   }
   /* CONTROL_LEAKING_SUB_GL_WINDOWS