patches/picom-next/max_fade.patch

diff --git a/src/config.c b/src/config.c
index d9b2dd9..0eb49de 100644
--- a/src/config.c
+++ b/src/config.c
@@ -755,6 +755,7 @@ char *parse_config(options_t *opt, const char *config_file, bool *shadow_enable,
 	    .fade_in_step = 0.028,
 	    .fade_out_step = 0.03,
 	    .fade_delta = 10,
+	    .no_fading_larger_than = 0,
 	    .no_fading_openclose = false,
 	    .no_fading_destroyed_argb = false,
 	    .fade_blacklist = NULL,
diff --git a/src/config.h b/src/config.h
index 7259dc1..a555be7 100644
--- a/src/config.h
+++ b/src/config.h
@@ -165,6 +165,8 @@ typedef struct options {
 	double fade_out_step;
 	/// Fading time delta. In milliseconds.
 	int fade_delta;
+	/// The maximum opacity change to fade on.
+	double no_fading_larger_than;
 	/// Whether to disable fading on window open/close.
 	bool no_fading_openclose;
 	/// Whether to disable fading on ARGB managed destroyed windows.
diff --git a/src/config_libconfig.c b/src/config_libconfig.c
index 461fff3..1e008c2 100644
--- a/src/config_libconfig.c
+++ b/src/config_libconfig.c
@@ -351,6 +351,8 @@ char *parse_config_libconfig(options_t *opt, const char *config_file, bool *shad
 	// -f (fading_enable)
 	if (config_lookup_bool(&cfg, "fading", &ival))
 		*fading_enable = ival;
+	// --no-fading-larger-than
+	config_lookup_float(&cfg, "no-fading-larger-than", &opt->no_fading_larger_than);
 	// --no-fading-open-close
 	lcfg_lookup_bool(&cfg, "no-fading-openclose", &opt->no_fading_openclose);
 	// --no-fading-destroyed-argb
diff --git a/src/dbus.c b/src/dbus.c
index 8b17b30..59d527e 100644
--- a/src/dbus.c
+++ b/src/dbus.c
@@ -1289,6 +1289,15 @@ static bool cdbus_process_opts_set(session_t *ps, DBusMessage *msg) {
 		goto cdbus_process_opts_set_success;
 	}
 
+	// no_fading_larger_than
+	if (!strcmp("no_fading_larger_than", target)) {
+		double val = 0.0;
+		if (!cdbus_msg_get_arg(msg, 1, DBUS_TYPE_DOUBLE, &val))
+			return false;
+		ps->o.no_fading_larger_than = normalize_d(val);
+		goto cdbus_process_opts_set_success;
+	}
+
 	// no_fading_openclose
 	if (!strcmp("no_fading_openclose", target)) {
 		dbus_bool_t val = FALSE;
diff --git a/src/options.c b/src/options.c
index ba7485d..69e1a40 100644
--- a/src/options.c
+++ b/src/options.c
@@ -175,6 +175,7 @@ static const struct picom_option picom_options[] = {
                                                                              "you want to attach a debugger to picom"},
     {"no-ewmh-fullscreen"          , no_argument      , 803, NULL          , "Do not use EWMH to detect fullscreen windows. Reverts to checking if a "
                                                                              "window is fullscreen based only on its size and coordinates."},
+    {"no-fading-larger-than"       , required_argument, 804, NULL          , "do not fade when the opacity difference would be larger than this value"},
 };
 // clang-format on
 
@@ -402,6 +403,7 @@ bool get_cfg(options_t *opt, int argc, char *const *argv, bool shadow_enable,
 			// These options are handled by get_early_config()
 			break;
 		P_CASEINT('D', fade_delta);
+		case 804: opt->no_fading_larger_than = normalize_d(atof(optarg)); break;
 		case 'I': opt->fade_in_step = normalize_d(atof(optarg)); break;
 		case 'O': opt->fade_out_step = normalize_d(atof(optarg)); break;
 		case 'c': shadow_enable = true; break;
diff --git a/src/picom.c b/src/picom.c
index fd693fc..1a475c5 100644
--- a/src/picom.c
+++ b/src/picom.c
@@ -992,7 +992,6 @@ void force_repaint(session_t *ps) {
 /** @name DBus hooks
  */
 ///@{
-
 /**
  * Set no_fading_openclose option.
  *
diff --git a/src/win.c b/src/win.c
index 370fbfd..baea80b 100644
--- a/src/win.c
+++ b/src/win.c
@@ -864,6 +864,10 @@ bool win_should_fade(session_t *ps, const struct managed_win *w) {
 	if (w->fade_force != UNSET) {
 		return w->fade_force;
 	}
+	if (ps->o.no_fading_larger_than &&
+	    ps->o.no_fading_larger_than < fabs(w->opacity - w->opacity_target)) {
+		return false;
+	}
 	if (ps->o.no_fading_openclose && w->in_openclose) {
 		return false;
 	}