From 8dcf324f15f0106ca054658b3f35288f52625ced Mon Sep 17 00:00:00 2001
From: Saphira Kai <kai.saphira@gmail.com>
Date: Wed, 30 Mar 2022 01:34:21 -0300
Subject: [PATCH] add support for arbitrary refresh rates in the select
 animation

---
 config.mk     |  5 ++++-
 instantmenu.c | 21 +++++++++++++++++++--
 2 files changed, 23 insertions(+), 3 deletions(-)

diff --git a/config.mk b/config.mk
index 6ff31d7..4d714ce 100644
--- a/config.mk
+++ b/config.mk
@@ -12,6 +12,9 @@ X11LIB = /usr/X11R6/lib
 XINERAMALIBS  = -lXinerama
 XINERAMAFLAGS = -DXINERAMA
 
+# XRandR
+XRANDRLIBS = -lXrandr
+
 # freetype
 FREETYPELIBS = -lfontconfig -lXft
 FREETYPEINC = /usr/include/freetype2
@@ -20,7 +23,7 @@ FREETYPEINC = /usr/include/freetype2
 
 # includes and libs
 INCS = -I$(X11INC) -I$(FREETYPEINC)
-LIBS = -L$(X11LIB) -lX11 $(XINERAMALIBS) $(FREETYPELIBS) -lm
+LIBS = -L$(X11LIB) -lX11 $(XINERAMALIBS) $(XRANDRLIBS) $(FREETYPELIBS) -lm
 
 # flags
 CPPFLAGS = -D_DEFAULT_SOURCE -D_BSD_SOURCE -D_XOPEN_SOURCE=700 -D_POSIX_C_SOURCE=200809L -DVERSION=\"$(VERSION)\" $(XINERAMAFLAGS)
diff --git a/instantmenu.c b/instantmenu.c
index 70651c3..89da032 100644
--- a/instantmenu.c
+++ b/instantmenu.c
@@ -15,6 +15,7 @@
 #ifdef XINERAMA
 #include <X11/extensions/Xinerama.h>
 #endif
+#include <X11/extensions/Xrandr.h>
 #include <X11/Xft/Xft.h>
 #include <X11/cursorfont.h>
 #include <X11/Xresource.h>
@@ -727,6 +728,14 @@ void animatesel() {
 	int time;
 	time  = 0;
 	drw_setscheme(drw, scheme[SchemeSel]);
+
+	XRRScreenConfiguration *conf = XRRGetScreenInfo(dpy, RootWindow(dpy, 0));
+	short refresh_rate = XRRConfigCurrentRate(conf);
+        
+	// scale the framerate properly for !=60Hz displays
+	framecount = framecount * (refresh_rate / 60);
+	double usecs = (1 / (double)refresh_rate) * 1000000;
+
 	while (time < framecount)
 	{
 		// bottom animation
@@ -736,7 +745,7 @@ void animatesel() {
 		drw_rect(drw, 0, sely + 4 - (easeOutQuint(((double)time/framecount)) * (sely + 4)), mw, (easeOutQuint(((double)time/framecount)) * sely), 1, 1, 0);
 		drw_map(drw, win, 0, 0, mw, mh);
 		time++;
-		usleep(19000);
+		usleep(usecs);
 	}
 }
 
@@ -755,13 +764,21 @@ void animaterect(int x1, int y1, int w1, int h1, int x2, int y2, int w2, int h2)
 	time  = 0;
 	double timefactor = 0;
 	drw_setscheme(drw, scheme[SchemeSel]);
+
+	XRRScreenConfiguration *conf = XRRGetScreenInfo(dpy, RootWindow(dpy, 0));
+	short refresh_rate = XRRConfigCurrentRate(conf);
+        
+	// scale the framerate properly for !=60Hz displays
+	framecount = framecount * (refresh_rate / 60);
+	double usecs = (1 / (double)refresh_rate) * 1000000;
+
 	while (time < framecount)
 	{
 		timefactor = easeOutQuint((double)time/framecount);
 		drw_rect(drw, x1 + (x2 - x1) * timefactor, y1 + (y2 - y1) * timefactor, w1 + (w2 - w1) * timefactor, h1 + (h2 - h1) * timefactor, 1, 1, 0);
 		drw_map(drw, win, 0, 0, mw, mh);
 		time++;
-		usleep(19000);
+		usleep(usecs);
 	}
 }