Send output current mode when changed

backend/wayland/output.c

@@ -210,9 +210,7 @@ static void xdg_toplevel_handle_configure(void *data, struct zxdg_toplevel_v6 *x
 	}
 	// loop over states for maximized etc?
 	wl_egl_window_resize(output->egl_window, width, height, 0, 0);
-	output->wlr_output.width = width;
-	output->wlr_output.height = height;
-	wlr_output_update_matrix(&output->wlr_output);
+	wlr_output_update_size(&output->wlr_output, width, height);
 	wl_signal_emit(&output->wlr_output.events.resolution, output);
 }
 
@@ -244,13 +242,11 @@ struct wlr_output *wlr_wl_output_create(struct wlr_backend *_backend) {
 	wlr_output_init(&output->wlr_output, &backend->backend, &output_impl);
 	struct wlr_output *wlr_output = &output->wlr_output;
 
-	wlr_output->width = 640;
-	wlr_output->height = 480;
+	wlr_output_update_size(wlr_output, 640, 480);
 	strncpy(wlr_output->make, "wayland", sizeof(wlr_output->make));
 	strncpy(wlr_output->model, "wayland", sizeof(wlr_output->model));
 	snprintf(wlr_output->name, sizeof(wlr_output->name), "WL-%d",
 		wl_list_length(&backend->outputs) + 1);
-	wlr_output_update_matrix(wlr_output);
 
 	output->backend = backend;
 

backend/x11/backend.c

@@ -121,9 +121,7 @@ static bool handle_x11_event(struct wlr_x11_backend *x11, xcb_generic_event_t *e
 	case XCB_CONFIGURE_NOTIFY: {
 		xcb_configure_notify_event_t *ev = (xcb_configure_notify_event_t *)event;
 
-		output->wlr_output.width = ev->width;
-		output->wlr_output.height = ev->height;
-		wlr_output_update_matrix(&output->wlr_output);
+		wlr_output_update_size(&output->wlr_output, ev->width, ev->height);
 		wl_signal_emit(&output->wlr_output.events.resolution, output);
 
 		// Move the pointer to its new location

include/wlr/interfaces/wlr_output.h

@@ -25,7 +25,8 @@ struct wlr_output_impl {
 void wlr_output_init(struct wlr_output *output, struct wlr_backend *backend,
 	const struct wlr_output_impl *impl);
 void wlr_output_free(struct wlr_output *output);
-void wlr_output_update_matrix(struct wlr_output *output);
+void wlr_output_update_size(struct wlr_output *output, int32_t width,
+	int32_t height);
 struct wl_global *wlr_output_create_global(struct wlr_output *wlr_output,
 	struct wl_display *display);
 void wlr_output_destroy_global(struct wlr_output *wlr_output);

types/wlr_output.c

@@ -33,8 +33,8 @@ static void wl_output_send_to_resource(struct wl_resource *resource) {
 			if (output->current_mode == mode) {
 				flags |= WL_OUTPUT_MODE_CURRENT;
 			}
-			wl_output_send_mode(resource, flags,
-				mode->width, mode->height, mode->refresh);
+			wl_output_send_mode(resource, flags, mode->width, mode->height,
+				mode->refresh);
 		}
 
 		if (wl_list_length(&output->modes) == 0) {
@@ -51,6 +51,25 @@ static void wl_output_send_to_resource(struct wl_resource *resource) {
 	}
 }
 
+static void wlr_output_send_current_mode_to_resource(
+		struct wl_resource *resource) {
+	struct wlr_output *output = wl_resource_get_user_data(resource);
+	assert(output);
+	const uint32_t version = wl_resource_get_version(resource);
+	if (version < WL_OUTPUT_MODE_SINCE_VERSION) {
+		return;
+	}
+	if (output->current_mode != NULL) {
+		struct wlr_output_mode *mode = output->current_mode;
+		wl_output_send_mode(resource, mode->flags | WL_OUTPUT_MODE_CURRENT,
+			mode->width, mode->height, mode->refresh);
+	} else {
+		// Output has no mode, send the current width/height
+		wl_output_send_mode(resource, WL_OUTPUT_MODE_CURRENT, output->width,
+			output->height, 0);
+	}
+}
+
 static void wl_output_destroy(struct wl_resource *resource) {
 	struct wlr_output *output = wl_resource_get_user_data(resource);
 	struct wl_resource *_resource = NULL;
@@ -110,32 +129,52 @@ void wlr_output_destroy_global(struct wlr_output *wlr_output) {
 	wlr_output->wl_global = NULL;
 }
 
-void wlr_output_update_matrix(struct wlr_output *output) {
-	wlr_matrix_texture(output->transform_matrix, output->width, output->height, output->transform);
+static void wlr_output_update_matrix(struct wlr_output *output) {
+	wlr_matrix_texture(output->transform_matrix, output->width, output->height,
+		output->transform);
 }
 
 void wlr_output_enable(struct wlr_output *output, bool enable) {
 	output->impl->enable(output, enable);
 }
 
-bool wlr_output_set_mode(struct wlr_output *output, struct wlr_output_mode *mode) {
+bool wlr_output_set_mode(struct wlr_output *output,
+		struct wlr_output_mode *mode) {
 	if (!output->impl || !output->impl->set_mode) {
 		return false;
 	}
 	bool result = output->impl->set_mode(output, mode);
 	if (result) {
 		wlr_output_update_matrix(output);
+		struct wl_resource *resource;
+		wl_resource_for_each(resource, &output->wl_resources) {
+			wlr_output_send_current_mode_to_resource(resource);
+		}
 	}
 	return result;
 }
 
+void wlr_output_update_size(struct wlr_output *output, int32_t width,
+		int32_t height) {
+	output->width = width;
+	output->height = height;
+	wlr_output_update_matrix(output);
+	if (output->wl_global != NULL) {
+		struct wl_resource *resource;
+		wl_resource_for_each(resource, &output->wl_resources) {
+			wlr_output_send_current_mode_to_resource(resource);
+		}
+	}
+}
+
 void wlr_output_transform(struct wlr_output *output,
 		enum wl_output_transform transform) {
 	output->impl->transform(output, transform);
 	wlr_output_update_matrix(output);
 }
 
-void wlr_output_set_position(struct wlr_output *output, int32_t lx, int32_t ly) {
+void wlr_output_set_position(struct wlr_output *output, int32_t lx,
+		int32_t ly) {
 	if (lx == output->lx && ly == output->ly) {
 		return;
 	}