From 0575cbe4504be195386701f337eea0da52ec1668 Mon Sep 17 00:00:00 2001
From: Jowan-Spooner <42868150+Jowan-Spooner@users.noreply.github.com>
Date: Sat, 9 Dec 2023 11:34:17 +0100
Subject: [PATCH] Add prepare() method for styles that should preload scenes
 (#1945)

The perpare() method should preload all the packed scenes needed for the particular style, thus fixing a lag-spike. Needs to be called manually right now.
---
 addons/dialogic/Modules/Style/subsystem_styles.gd | 7 ++++++-
 addons/dialogic/Resources/dialogic_style.gd       | 9 +++++++++
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/addons/dialogic/Modules/Style/subsystem_styles.gd b/addons/dialogic/Modules/Style/subsystem_styles.gd
index a3774e273..92be0404c 100644
--- a/addons/dialogic/Modules/Style/subsystem_styles.gd
+++ b/addons/dialogic/Modules/Style/subsystem_styles.gd
@@ -86,7 +86,12 @@ func create_layout(style:DialogicStyle) -> DialogicLayoutBase:
 		if not ResourceLoader.exists(layer.path):
 			continue
 
-		var layer_scene : DialogicLayoutLayer = load(layer.path).instantiate()
+		var layer_scene : DialogicLayoutLayer = null
+
+		if ResourceLoader.load_threaded_get_status(layer.path) == ResourceLoader.THREAD_LOAD_LOADED:
+			layer_scene = ResourceLoader.load_threaded_get(layer.path).instantiate()
+		else:
+			layer_scene = load(layer.path).instantiate()
 
 		base_scene.add_layer(layer_scene)
 
diff --git a/addons/dialogic/Resources/dialogic_style.gd b/addons/dialogic/Resources/dialogic_style.gd
index a2a30ce5a..f0c1b29e0 100644
--- a/addons/dialogic/Resources/dialogic_style.gd
+++ b/addons/dialogic/Resources/dialogic_style.gd
@@ -185,3 +185,12 @@ func clone() -> DialogicStyle:
 		style.add_layer(info.path, info.overrides)
 
 	return style
+
+
+func prepare() -> void:
+	if base_scene:
+		ResourceLoader.load_threaded_request(base_scene.resource_path)
+
+	for layer in layers:
+		if layer.scene:
+			ResourceLoader.load_threaded_request(layer.scene.resource_path)