Add `set_slot_custom_icon` and `get_slot_custom_icon` to GraphNode

doc/classes/GraphNode.xml

@@ -116,6 +116,20 @@
 				Returns the right (output) [Color] of the slot with the given [param slot_index].
 			</description>
 		</method>
+		<method name="get_slot_custom_icon_left" qualifiers="const">
+			<return type="Texture2D" />
+			<param index="0" name="slot_index" type="int" />
+			<description>
+				Returns the left (input) custom [Texture2D] of the slot with the given [param slot_index].
+			</description>
+		</method>
+		<method name="get_slot_custom_icon_right" qualifiers="const">
+			<return type="Texture2D" />
+			<param index="0" name="slot_index" type="int" />
+			<description>
+				Returns the right (output) custom [Texture2D] of the slot with the given [param slot_index].
+			</description>
+		</method>
 		<method name="get_slot_type_left" qualifiers="const">
 			<return type="int" />
 			<param index="0" name="slot_index" type="int" />
@@ -195,6 +209,22 @@
 				Sets the [Color] of the right (output) side of the slot with the given [param slot_index] to [param color].
 			</description>
 		</method>
+		<method name="set_slot_custom_icon_left">
+			<return type="void" />
+			<param index="0" name="slot_index" type="int" />
+			<param index="1" name="custom_icon" type="Texture2D" />
+			<description>
+				Sets the custom [Texture2D] of the left (input) side of the slot with the given [param slot_index] to [param custom_icon].
+			</description>
+		</method>
+		<method name="set_slot_custom_icon_right">
+			<return type="void" />
+			<param index="0" name="slot_index" type="int" />
+			<param index="1" name="custom_icon" type="Texture2D" />
+			<description>
+				Sets the custom [Texture2D] of the right (output) side of the slot with the given [param slot_index] to [param custom_icon].
+			</description>
+		</method>
 		<method name="set_slot_draw_stylebox">
 			<return type="void" />
 			<param index="0" name="slot_index" type="int" />

scene/gui/graph_node.cpp

@@ -482,6 +482,27 @@ Color GraphNode::get_slot_color_left(int p_slot_index) const {
 	return slot_table[p_slot_index].color_left;
 }
 
+void GraphNode::set_slot_custom_icon_left(int p_slot_index, const Ref<Texture2D> &p_custom_icon) {
+	ERR_FAIL_COND_MSG(!slot_table.has(p_slot_index), vformat("Cannot set custom_port_icon_left for the slot with index '%d' because it hasn't been enabled.", p_slot_index));
+
+	if (slot_table[p_slot_index].custom_port_icon_left == p_custom_icon) {
+		return;
+	}
+
+	slot_table[p_slot_index].custom_port_icon_left = p_custom_icon;
+	queue_redraw();
+	port_pos_dirty = true;
+
+	emit_signal(SNAME("slot_updated"), p_slot_index);
+}
+
+Ref<Texture2D> GraphNode::get_slot_custom_icon_left(int p_slot_index) const {
+	if (!slot_table.has(p_slot_index)) {
+		return Ref<Texture2D>();
+	}
+	return slot_table[p_slot_index].custom_port_icon_left;
+}
+
 bool GraphNode::is_slot_enabled_right(int p_slot_index) const {
 	if (!slot_table.has(p_slot_index)) {
 		return false;
@@ -545,6 +566,27 @@ Color GraphNode::get_slot_color_right(int p_slot_index) const {
 	return slot_table[p_slot_index].color_right;
 }
 
+void GraphNode::set_slot_custom_icon_right(int p_slot_index, const Ref<Texture2D> &p_custom_icon) {
+	ERR_FAIL_COND_MSG(!slot_table.has(p_slot_index), vformat("Cannot set custom_port_icon_right for the slot with index '%d' because it hasn't been enabled.", p_slot_index));
+
+	if (slot_table[p_slot_index].custom_port_icon_right == p_custom_icon) {
+		return;
+	}
+
+	slot_table[p_slot_index].custom_port_icon_right = p_custom_icon;
+	queue_redraw();
+	port_pos_dirty = true;
+
+	emit_signal(SNAME("slot_updated"), p_slot_index);
+}
+
+Ref<Texture2D> GraphNode::get_slot_custom_icon_right(int p_slot_index) const {
+	if (!slot_table.has(p_slot_index)) {
+		return Ref<Texture2D>();
+	}
+	return slot_table[p_slot_index].custom_port_icon_right;
+}
+
 bool GraphNode::is_slot_draw_stylebox(int p_slot_index) const {
 	if (!slot_table.has(p_slot_index)) {
 		return false;
@@ -797,6 +839,9 @@ void GraphNode::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("set_slot_color_left", "slot_index", "color"), &GraphNode::set_slot_color_left);
 	ClassDB::bind_method(D_METHOD("get_slot_color_left", "slot_index"), &GraphNode::get_slot_color_left);
 
+	ClassDB::bind_method(D_METHOD("set_slot_custom_icon_left", "slot_index", "custom_icon"), &GraphNode::set_slot_custom_icon_left);
+	ClassDB::bind_method(D_METHOD("get_slot_custom_icon_left", "slot_index"), &GraphNode::get_slot_custom_icon_left);
+
 	ClassDB::bind_method(D_METHOD("is_slot_enabled_right", "slot_index"), &GraphNode::is_slot_enabled_right);
 	ClassDB::bind_method(D_METHOD("set_slot_enabled_right", "slot_index", "enable"), &GraphNode::set_slot_enabled_right);
 
@@ -806,6 +851,9 @@ void GraphNode::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("set_slot_color_right", "slot_index", "color"), &GraphNode::set_slot_color_right);
 	ClassDB::bind_method(D_METHOD("get_slot_color_right", "slot_index"), &GraphNode::get_slot_color_right);
 
+	ClassDB::bind_method(D_METHOD("set_slot_custom_icon_right", "slot_index", "custom_icon"), &GraphNode::set_slot_custom_icon_right);
+	ClassDB::bind_method(D_METHOD("get_slot_custom_icon_right", "slot_index"), &GraphNode::get_slot_custom_icon_right);
+
 	ClassDB::bind_method(D_METHOD("is_slot_draw_stylebox", "slot_index"), &GraphNode::is_slot_draw_stylebox);
 	ClassDB::bind_method(D_METHOD("set_slot_draw_stylebox", "slot_index", "enable"), &GraphNode::set_slot_draw_stylebox);
 

scene/gui/graph_node.h

@@ -129,6 +129,9 @@ public:
 	void set_slot_color_left(int p_slot_index, const Color &p_color);
 	Color get_slot_color_left(int p_slot_index) const;
 
+	void set_slot_custom_icon_left(int p_slot_index, const Ref<Texture2D> &p_custom_icon);
+	Ref<Texture2D> get_slot_custom_icon_left(int p_slot_index) const;
+
 	bool is_slot_enabled_right(int p_slot_index) const;
 	void set_slot_enabled_right(int p_slot_index, bool p_enable);
 
@@ -138,6 +141,9 @@ public:
 	void set_slot_color_right(int p_slot_index, const Color &p_color);
 	Color get_slot_color_right(int p_slot_index) const;
 
+	void set_slot_custom_icon_right(int p_slot_index, const Ref<Texture2D> &p_custom_icon);
+	Ref<Texture2D> get_slot_custom_icon_right(int p_slot_index) const;
+
 	bool is_slot_draw_stylebox(int p_slot_index) const;
 	void set_slot_draw_stylebox(int p_slot_index, bool p_enable);