From 50e4a49c2ea63d9e946f1264f4fe735b76270d1c Mon Sep 17 00:00:00 2001
From: DreamMaoMao <2523610504@qq.com>
Date: Wed, 17 Sep 2025 12:02:14 +0800
Subject: [PATCH] opt: use nearest refresh for monitor rule

---
 src/mango.c | 17 ++++++++++++-----
 1 file changed, 12 insertions(+), 5 deletions(-)

diff --git a/src/mango.c b/src/mango.c
index 4a6e546..60f72cc 100644
--- a/src/mango.c
+++ b/src/mango.c
@@ -2506,15 +2506,22 @@ void createlocksurface(struct wl_listener *listener, void *data) {
 
 struct wlr_output_mode *get_output_mode(struct wlr_output *output, int width,
 										int height, float refresh) {
-	struct wlr_output_mode *mode;
+	struct wlr_output_mode *mode, *nearest_mode = NULL;
+	float min_diff = 99999.0f;
+
 	wl_list_for_each(mode, &output->modes, link) {
-		if (mode->width == width && mode->height == height &&
-			(int)round(mode->refresh / 1000) == (int)round(refresh)) {
-			return mode;
+		if (mode->width == width && mode->height == height) {
+			float mode_refresh = mode->refresh / 1000.0f;
+			float diff = fabsf(mode_refresh - refresh);
+
+			if (diff < min_diff) {
+				min_diff = diff;
+				nearest_mode = mode;
+			}
 		}
 	}
 
-	return NULL;
+	return nearest_mode;
 }
 
 void createmon(struct wl_listener *listener, void *data) {