Update to Godot 4 (#1)

* Initial conversion and error fixing

* Better static typing

* Replace dictionaries with classes for better static typing

There seems to be a tiny performance increase with this

* Change stretch mode from "2d" to "canvas_item"

2d was the Godot 3.x name of the mode and is no longer valid in Godot 4.x

* Put an AspectRatioContainer node for the texture in the main scene

Example/Texture.gd

@@ -1,17 +1,16 @@
 extends TextureRect
 
-var rect_data: Dictionary
+var rect_data: RegionUnpacker.RectData
 
 # roughly 665886 with old imp
 func _on_Button_pressed() -> void:
 	var time = Time.get_ticks_usec()
 	var unpak := RegionUnpacker.new(10, 3)
-	rect_data = unpak.get_used_rects(texture.get_data())
-	$Control.show_preview(rect_data["rects"])
+	rect_data = unpak.get_used_rects(texture.get_image())
+	$Control.show_preview(rect_data.rects)
 	print(Time.get_ticks_usec() - time)
 
 
-
 func _on_Texture_item_rect_changed() -> void:
-	if "rects" in rect_data.keys():
-		$Control.show_preview(rect_data["rects"])
+	if is_instance_valid(rect_data) and not rect_data.rects.is_empty():
+		$Control.show_preview(rect_data.rects)

Example/Texture.tscn

@@ -1,27 +1,47 @@
-[gd_scene load_steps=4 format=2]
+[gd_scene load_steps=4 format=3 uid="uid://d35eiq1krfqyk"]
 
-[ext_resource path="res://Example/Texture.gd" type="Script" id=1]
-[ext_resource path="res://Example/example sheet.png" type="Texture" id=2]
-[ext_resource path="res://addons/SmartSlicer/SmartSlicePreview.gd" type="Script" id=3]
+[ext_resource type="Script" path="res://Example/Texture.gd" id="1"]
+[ext_resource type="Texture2D" uid="uid://bwh16a5td5gwe" path="res://Example/example sheet.png" id="2"]
+[ext_resource type="Script" path="res://addons/SmartSlicer/SmartSlicePreview.gd" id="3"]
 
-[node name="Texture" type="TextureRect"]
+[node name="Control" type="Control"]
+layout_mode = 3
+anchors_preset = 15
 anchor_right = 1.0
 anchor_bottom = 1.0
-texture = ExtResource( 2 )
-stretch_mode = 6
-script = ExtResource( 1 )
+grow_horizontal = 2
+grow_vertical = 2
 
-[node name="Control" type="Control" parent="."]
+[node name="AspectRatioContainer" type="AspectRatioContainer" parent="."]
+layout_mode = 1
+anchors_preset = 15
 anchor_right = 1.0
 anchor_bottom = 1.0
-script = ExtResource( 3 )
+offset_right = 1.0
+offset_bottom = -2.0
+grow_horizontal = 2
+grow_vertical = 2
+ratio = 1.9912
+
+[node name="Texture" type="TextureRect" parent="AspectRatioContainer"]
+layout_mode = 2
+texture = ExtResource("2")
+stretch_mode = 5
+script = ExtResource("1")
+
+[node name="Control" type="Control" parent="AspectRatioContainer/Texture"]
+anchors_preset = 0
+anchor_right = 1.0
+anchor_bottom = 1.0
+script = ExtResource("3")
 
 [node name="Button" type="Button" parent="."]
-margin_left = 791.0
-margin_top = 495.0
-margin_right = 984.0
-margin_bottom = 563.0
+layout_mode = 0
+offset_left = 791.0
+offset_top = 495.0
+offset_right = 984.0
+offset_bottom = 563.0
 text = "Slice"
 
-[connection signal="item_rect_changed" from="." to="." method="_on_Texture_item_rect_changed"]
-[connection signal="pressed" from="Button" to="." method="_on_Button_pressed"]
+[connection signal="item_rect_changed" from="AspectRatioContainer/Texture" to="AspectRatioContainer/Texture" method="_on_Texture_item_rect_changed"]
+[connection signal="pressed" from="Button" to="AspectRatioContainer/Texture" method="_on_Button_pressed"]

Example/example sheet.png.import

@@ -1,35 +1,34 @@
 [remap]
 
 importer="texture"
-type="StreamTexture"
-path="res://.import/example sheet.png-0360b514ecb50cc6e83b9cd009b2aff9.stex"
+type="CompressedTexture2D"
+uid="uid://bwh16a5td5gwe"
+path="res://.godot/imported/example sheet.png-0360b514ecb50cc6e83b9cd009b2aff9.ctex"
 metadata={
 "vram_texture": false
 }
 
 [deps]
 
 source_file="res://Example/example sheet.png"
-dest_files=[ "res://.import/example sheet.png-0360b514ecb50cc6e83b9cd009b2aff9.stex" ]
+dest_files=["res://.godot/imported/example sheet.png-0360b514ecb50cc6e83b9cd009b2aff9.ctex"]
 
 [params]
 
 compress/mode=0
+compress/high_quality=false
 compress/lossy_quality=0.7
-compress/hdr_mode=0
-compress/bptc_ldr=0
+compress/hdr_compression=1
 compress/normal_map=0
-flags/repeat=0
-flags/filter=false
-flags/mipmaps=false
-flags/anisotropic=false
-flags/srgb=2
+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/HDR_as_SRGB=false
-process/invert_color=false
 process/normal_map_invert_y=false
-stream=false
-size_limit=0
-detect_3d=true
-svg/scale=1.0
+process/hdr_as_srgb=false
+process/hdr_clamp_exposure=false
+process/size_limit=0
+detect_3d/compress_to=1