Add a PCK loading/unloading demo

loading/pck_loading/README.md

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+# PCK loading demo
+
+This demo shows how you can load and unload exported PCK files at runtime.
+
+Language: GDScript
+
+Renderer: GLES 2
+
+## Sub-projects
+
+There are three Godot projects under `sub_projects`. All have been exported to their respective PCK files and are loaded by the main project.
+
+## Screenshots
+
+![Screenshot](screenshots/screenshot.png)

loading/pck_loading/Root.gd

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+extends Control
+
+@onready var vp_orig = $HBoxContainer/VBoxContainer/SubViewportContainer/ViewOrig
+@onready var vp_a = $HBoxContainer/VBoxContainer2/SubViewportContainer/ViewA
+@onready var vp_b = $HBoxContainer/VBoxContainer3/SubViewportContainer/ViewB
+@onready var no_scene_lbl = $NoNodeLbl
+
+@export_file("*.pck") var pck_1
+@export_file("*.pck") var pck_2
+@export_file("*.pck") var pck_3
+
+
+func _ready():
+	reload_scene()
+
+
+func reload_scene():
+	$LineEdit.text = ""
+	populate_file_list("res://")
+
+	load_scene_at_node("res://orig.tscn", vp_orig)
+	load_scene_at_node("res://a.tscn", vp_a)
+	load_scene_at_node("res://b.tscn", vp_b)
+
+
+func populate_file_list(path: String):
+	var dir = Directory.new()
+	dir.open(path)
+	dir.list_dir_begin()
+	var file_name = dir.get_next()
+	while file_name != "":
+		if dir.current_is_dir():
+			populate_file_list(path + file_name + "/")
+		else:
+			$LineEdit.text += path + file_name + '\n'
+		file_name = dir.get_next()
+
+
+func load_scene_at_node(scene_name: String, node: Node):
+	var child
+	if ResourceLoader.exists(scene_name):
+		child = load(scene_name).instantiate()
+	else:
+		child = no_scene_lbl.duplicate()
+		child.position = Vector2.ZERO
+	if node.get_child_count() > 0:
+		node.remove_child(node.get_child(0))
+	node.add_child(child)
+
+
+func _on_load1_pressed():
+	ProjectSettings.load_resource_pack(pck_1, $VBoxContainer/HBoxContainer/CheckBox.is_pressed())
+	reload_scene()
+
+
+func _on_unload1_pressed():
+	ProjectSettings.unload_resource_pack(pck_1)
+	reload_scene()
+
+
+func _on_load2_pressed():
+	ProjectSettings.load_resource_pack(pck_2, $VBoxContainer/HBoxContainer2/CheckBox.is_pressed())
+	reload_scene()
+
+
+func _on_unload2_pressed():
+	ProjectSettings.unload_resource_pack(pck_2)
+	reload_scene()
+
+
+func _on_load3_pressed():
+	ProjectSettings.load_resource_pack(pck_3, $VBoxContainer/HBoxContainer3/CheckBox.is_pressed())
+	reload_scene()
+
+
+func _on_unload3_pressed():
+	ProjectSettings.unload_resource_pack(pck_3)
+	reload_scene()

loading/pck_loading/icon.png.import

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+[remap]
+
+importer="texture"
+type="CompressedTexture2D"
+uid="uid://btpbmejdh00qx"
+path="res://.godot/imported/icon.png-487276ed1e3a0c39cad0279d744ee560.ctex"
+metadata={
+"vram_texture": false
+}
+
+[deps]
+
+source_file="res://icon.png"
+dest_files=["res://.godot/imported/icon.png-487276ed1e3a0c39cad0279d744ee560.ctex"]
+
+[params]
+
+compress/mode=0
+compress/lossy_quality=0.7
+compress/hdr_compression=1
+compress/bptc_ldr=0
+compress/normal_map=0
+compress/channel_pack=0
+mipmaps/generate=false
+mipmaps/limit=-1
+roughness/mode=0
+roughness/src_normal=""
+process/fix_alpha_border=true
+process/premult_alpha=false
+process/normal_map_invert_y=false
+process/hdr_as_srgb=false
+process/hdr_clamp_exposure=false
+process/size_limit=0
+detect_3d/compress_to=1

loading/pck_loading/main.tscn

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+[gd_scene load_steps=2 format=3 uid="uid://biqc8303kctlu"]
+
+[ext_resource type="Script" path="res://Root.gd" id="1_dd1mq"]
+
+[node name="Root" type="Control"]
+script = ExtResource( "1_dd1mq" )
+pck_1 = "res://sub_projects/1.pck"
+pck_2 = "res://sub_projects/2.pck"
+pck_3 = "res://sub_projects/3.pck"
+
+[node name="LineEdit" type="Label" parent="."]
+offset_left = 67.0
+offset_top = 75.0
+offset_right = 463.0
+offset_bottom = 375.0
+autowrap_mode = 1
+clip_text = true
+
+[node name="VBoxContainer" type="VBoxContainer" parent="."]
+offset_left = 552.0
+offset_top = 81.0
+offset_right = 932.0
+offset_bottom = 379.0
+theme_override_constants/separation = 20
+
+[node name="HBoxContainer" type="HBoxContainer" parent="VBoxContainer"]
+offset_right = 380.0
+offset_bottom = 86.0
+size_flags_vertical = 3
+theme_override_constants/separation = 20
+
+[node name="Load" type="Button" parent="VBoxContainer/HBoxContainer"]
+offset_right = 125.0
+offset_bottom = 86.0
+size_flags_horizontal = 3
+text = "Load 1.pck"
+
+[node name="Unload" type="Button" parent="VBoxContainer/HBoxContainer"]
+offset_left = 145.0
+offset_right = 271.0
+offset_bottom = 86.0
+size_flags_horizontal = 3
+text = "Unload 1.pck"
+
+[node name="CheckBox" type="CheckBox" parent="VBoxContainer/HBoxContainer"]
+offset_left = 291.0
+offset_right = 380.0
+offset_bottom = 86.0
+text = "Replace
+files?"
+
+[node name="HBoxContainer2" type="HBoxContainer" parent="VBoxContainer"]
+offset_top = 106.0
+offset_right = 380.0
+offset_bottom = 192.0
+size_flags_vertical = 3
+theme_override_constants/separation = 20
+
+[node name="Load" type="Button" parent="VBoxContainer/HBoxContainer2"]
+offset_right = 125.0
+offset_bottom = 86.0
+size_flags_horizontal = 3
+text = "Load 2.pck"
+
+[node name="Unload" type="Button" parent="VBoxContainer/HBoxContainer2"]
+offset_left = 145.0
+offset_right = 271.0
+offset_bottom = 86.0
+size_flags_horizontal = 3
+text = "Unload 2.pck"
+
+[node name="CheckBox" type="CheckBox" parent="VBoxContainer/HBoxContainer2"]
+offset_left = 291.0
+offset_right = 380.0
+offset_bottom = 86.0
+text = "Replace
+files?"
+
+[node name="HBoxContainer3" type="HBoxContainer" parent="VBoxContainer"]
+offset_top = 212.0
+offset_right = 380.0
+offset_bottom = 298.0
+size_flags_vertical = 3
+theme_override_constants/separation = 20
+
+[node name="Load" type="Button" parent="VBoxContainer/HBoxContainer3"]
+offset_right = 125.0
+offset_bottom = 86.0
+size_flags_horizontal = 3
+text = "Load 3.pck"
+
+[node name="Unload" type="Button" parent="VBoxContainer/HBoxContainer3"]
+offset_left = 145.0
+offset_right = 271.0
+offset_bottom = 86.0
+size_flags_horizontal = 3
+text = "Unload 3.pck"
+
+[node name="CheckBox" type="CheckBox" parent="VBoxContainer/HBoxContainer3"]
+offset_left = 291.0
+offset_right = 380.0
+offset_bottom = 86.0
+text = "Replace
+files?"
+
+[node name="HBoxContainer" type="HBoxContainer" parent="."]
+offset_left = 44.0
+offset_top = 415.0
+offset_right = 934.0
+offset_bottom = 569.0
+size_flags_horizontal = 3
+
+[node name="VBoxContainer" type="VBoxContainer" parent="HBoxContainer"]
+offset_right = 294.0
+offset_bottom = 158.0
+size_flags_horizontal = 3
+
+[node name="Label" type="Label" parent="HBoxContainer/VBoxContainer"]
+offset_right = 294.0
+offset_bottom = 26.0
+text = "orig.tscn"
+
+[node name="SubViewportContainer" type="SubViewportContainer" parent="HBoxContainer/VBoxContainer"]
+minimum_size = Vector2(256, 0)
+offset_top = 30.0
+offset_right = 294.0
+offset_bottom = 158.0
+size_flags_vertical = 3
+
+[node name="ViewOrig" type="SubViewport" parent="HBoxContainer/VBoxContainer/SubViewportContainer"]
+handle_input_locally = false
+size = Vector2i(256, 128)
+render_target_update_mode = 4
+
+[node name="VBoxContainer2" type="VBoxContainer" parent="HBoxContainer"]
+offset_left = 298.0
+offset_right = 592.0
+offset_bottom = 158.0
+size_flags_horizontal = 3
+
+[node name="Label" type="Label" parent="HBoxContainer/VBoxContainer2"]
+offset_right = 294.0
+offset_bottom = 26.0
+text = "a.tscn"
+
+[node name="SubViewportContainer" type="SubViewportContainer" parent="HBoxContainer/VBoxContainer2"]
+minimum_size = Vector2(256, 0)
+offset_top = 30.0
+offset_right = 294.0
+offset_bottom = 158.0
+size_flags_vertical = 3
+
+[node name="ViewA" type="SubViewport" parent="HBoxContainer/VBoxContainer2/SubViewportContainer"]
+handle_input_locally = false
+size = Vector2i(256, 128)
+render_target_update_mode = 4
+
+[node name="VBoxContainer3" type="VBoxContainer" parent="HBoxContainer"]
+offset_left = 596.0
+offset_right = 890.0
+offset_bottom = 158.0
+size_flags_horizontal = 3
+
+[node name="Label" type="Label" parent="HBoxContainer/VBoxContainer3"]
+offset_right = 294.0
+offset_bottom = 26.0
+text = "b.tscn"
+
+[node name="SubViewportContainer" type="SubViewportContainer" parent="HBoxContainer/VBoxContainer3"]
+minimum_size = Vector2(256, 0)
+offset_top = 30.0
+offset_right = 294.0
+offset_bottom = 158.0
+size_flags_vertical = 3
+
+[node name="ViewB" type="SubViewport" parent="HBoxContainer/VBoxContainer3/SubViewportContainer"]
+handle_input_locally = false
+size = Vector2i(256, 128)
+render_target_update_mode = 4
+
+[node name="NoNodeLbl" type="Label" parent="."]
+offset_left = -184.0
+offset_top = -133.0
+offset_right = -144.0
+offset_bottom = -110.0
+text = "Missing scene file!"
+
+[node name="Label" type="Label" parent="."]
+offset_left = 65.0
+offset_top = 49.0
+offset_right = 128.0
+offset_bottom = 75.0
+text = "File List:"
+
+[connection signal="pressed" from="VBoxContainer/HBoxContainer/Load" to="." method="_on_load1_pressed"]
+[connection signal="pressed" from="VBoxContainer/HBoxContainer/Unload" to="." method="_on_unload1_pressed"]
+[connection signal="pressed" from="VBoxContainer/HBoxContainer2/Load" to="." method="_on_load2_pressed"]
+[connection signal="pressed" from="VBoxContainer/HBoxContainer2/Unload" to="." method="_on_unload2_pressed"]
+[connection signal="pressed" from="VBoxContainer/HBoxContainer3/Load" to="." method="_on_load3_pressed"]
+[connection signal="pressed" from="VBoxContainer/HBoxContainer3/Unload" to="." method="_on_unload3_pressed"]

loading/pck_loading/orig.tscn

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+[gd_scene format=3 uid="uid://dr3ofl6lrt7v2"]
+
+[node name="Control" type="Control"]
+anchor_right = 1.0
+anchor_bottom = 1.0
+
+[node name="Label" type="Label" parent="."]
+offset_right = 306.0
+offset_bottom = 104.0
+text = "Greetings from original data.pck
+file! This should always be here;
+if somehow this scene fails to
+load, something messed up
+`res://` lookup!"

loading/pck_loading/project.godot

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+; Engine configuration file.
+; It's best edited using the editor UI and not directly,
+; since the parameters that go here are not all obvious.
+;
+; Format:
+;   [section] ; section goes between []
+;   param=value ; assign values to parameters
+
+config_version=5
+
+[application]
+
+config/name="PCK loading"
+config/description="This demo shows how you can load and unload exported PCK files at runtime."
+run/main_scene="res://main.tscn"
+config/icon="res://icon.png"
+config/features=PackedStringArray("4.0")
+
+[rendering]
+
+quality/driver/driver_name="GLES2"
+vram_compression/import_etc=true
+vram_compression/import_etc2=false

loading/pck_loading/sub_projects/1/a.tscn

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+[gd_scene load_steps=3 format=3 uid="uid://cynxmx85sit6h"]
+
+[ext_resource type="Texture2D" uid="uid://deyknasv78sq2" path="res://icon.png" id="1_o57oj"]
+[ext_resource type="Script" path="res://script1.gd" id="2_u8kao"]
+
+[node name="Node2D" type="Node2D"]
+
+[node name="Label" type="Label" parent="."]
+offset_right = 40.0
+offset_bottom = 23.0
+text = "Greetings from 1.pck!"
+
+[node name="Sprite2D" type="Sprite2D" parent="."]
+position = Vector2(23, 41)
+scale = Vector2(0.5, 0.5)
+texture = ExtResource( "1_o57oj" )
+script = ExtResource( "2_u8kao" )