Wayland: Reorder resizing operations

Ensure a buffer is in place before calling viewporter.

common/video/wayland_egl_context.cpp

@@ -119,11 +119,9 @@ bool WaylandEGLContext::create_context()
 
 void WaylandEGLContext::resize(WaylandSurface::Metrics m)
 {
-    wayland_surface->resize(m);
-
-    std::tie(width, height) = wayland_surface->get_size();
+    std::tie(width, height) = wayland_surface->get_size_for_metrics(m);
     wl_egl_window_resize(egl_window, width, height, 0, 0);
-
+    wayland_surface->resize(m);
     make_current();
 }
 

common/video/wayland_surface.cpp

@@ -148,12 +148,17 @@ bool WaylandSurface::attach(wl_display *display, wl_surface *surface, Metrics m)
 
 std::tuple<int, int> WaylandSurface::get_size()
 {
-    if (actual_scale == 0.0)
-    {
-        return { metrics.width * metrics.scale, metrics.height * metrics.scale };
+    return get_size_for_metrics(metrics);
 }
 
-    return { round(metrics.width * actual_scale), round(metrics.height * actual_scale) };
+std::tuple<int, int> WaylandSurface::get_size_for_metrics(Metrics m)
+{
+    if (actual_scale == 0.0)
+    {
+        return { m.width * m.scale, m.height * m.scale };
+    }
+
+    return { round(m.width * actual_scale), round(m.height * actual_scale) };
 }
 
 void WaylandSurface::resize(Metrics m)

common/video/wayland_surface.hpp

@@ -23,6 +23,7 @@ class WaylandSurface
     bool attach(wl_display *display, wl_surface *surface, Metrics source_metrics);
     void resize(Metrics new_metrics);
     std::tuple<int, int> get_size();
+    std::tuple<int, int> get_size_for_metrics(Metrics m);
 
     struct wl_display *display;
     struct wl_registry *registry;

gtk/src/gtk_display_driver_vulkan.cpp

@@ -91,10 +91,7 @@ void S9xVulkanDisplayDriver::refresh()
 
 #ifdef GDK_WINDOWING_WAYLAND
     if (GDK_IS_WAYLAND_WINDOW(drawing_area->get_window()->gobj()))
-    {
-        wayland_surface->resize(get_metrics(*drawing_area));
-        std::tie(new_width, new_height) = wayland_surface->get_size();
-    }
+        std::tie(new_width, new_height) = wayland_surface->get_size_for_metrics(get_metrics(*drawing_area));
     else
 #endif
     {
@@ -108,6 +105,11 @@ void S9xVulkanDisplayDriver::refresh()
         context->wait_idle();
         current_width = new_width;
         current_height = new_height;
+
+#ifdef GDK_WINDOWING_WAYLAND
+        if (GDK_IS_WAYLAND_WINDOW(drawing_area->get_window()->gobj()))
+            wayland_surface->resize(get_metrics(*drawing_area));
+#endif
     }
 }
 

qt/src/EmuCanvasVulkan.cpp

@@ -220,19 +220,23 @@ void EmuCanvasVulkan::resizeEvent(QResizeEvent *event)
     if (!context)
         return;
 
-    int width = event->size().width();
-    int height = event->size().height();
-
     context->swapchain->set_vsync(config->enable_vsync);
 
 #ifndef _WIN32
     if (platform == "wayland")
     {
-        wayland_surface->resize({ parent->x() - main_window->x(), parent->y() - main_window->y(), width, height, (int)devicePixelRatio() });
-        std::tie(width, height) = wayland_surface->get_size();
-        // On Wayland, Vulkan WSI provides the buffer for the subsurface,
-        // so we have to specify a width and height instead of polling the parent.
+        WaylandSurface::Metrics m = {
+            parent->x() - main_window->x(),
+            parent->y() - main_window->y(),
+            event->size().width(),
+            event->size().height(),
+            (int)devicePixelRatio()
+        };
+
+        auto [width, height] = wayland_surface->get_size_for_metrics(m);
         context->swapchain->check_and_resize(width, height);
+
+        wayland_surface->resize(m);
         return;
     }
 #endif