From e36c065c7b0dc4fc8f7fe8a061bcf9758044ac2a Mon Sep 17 00:00:00 2001
From: Consus <consus@ftml.net>
Date: Sat, 2 Dec 2023 17:53:12 +0300
Subject: [PATCH] Implement fractional-scale-v1 protocol

This protocol allows Wayland clients to properly scale on outputs with
fractional scale factor.

Tested with foot and transmission-qt (Qt6).
---
 src/server.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/server.c b/src/server.c
index bd21d775..e3c5f7e3 100644
--- a/src/server.c
+++ b/src/server.c
@@ -5,6 +5,7 @@
 #include <sys/wait.h>
 #include <wlr/types/wlr_data_control_v1.h>
 #include <wlr/types/wlr_export_dmabuf_v1.h>
+#include <wlr/types/wlr_fractional_scale_v1.h>
 #include <wlr/types/wlr_gamma_control_v1.h>
 #include <wlr/types/wlr_input_inhibitor.h>
 #include <wlr/types/wlr_presentation_time.h>
@@ -31,6 +32,7 @@
 #include "xwayland.h"
 
 #define LAB_WLR_COMPOSITOR_VERSION (5)
+#define LAB_WLR_FRACTIONAL_SCALE_V1_VERSION 1
 
 static struct wlr_compositor *compositor;
 static struct wl_event_source *sighup_source;
@@ -377,6 +379,8 @@ server_init(struct server *server)
 	wlr_data_control_manager_v1_create(server->wl_display);
 	wlr_viewporter_create(server->wl_display);
 	wlr_single_pixel_buffer_manager_v1_create(server->wl_display);
+	wlr_fractional_scale_manager_v1_create(server->wl_display,
+		LAB_WLR_FRACTIONAL_SCALE_V1_VERSION);
 
 	idle_manager_create(server->wl_display, server->seat.seat);