Initial work for tilemap layers

src/Autoload/Global.gd

@@ -14,7 +14,7 @@ signal cel_switched  ## Emitted whenever you select a different cel.
 signal project_data_changed(project: Project)  ## Emitted when project data is modified.
 signal font_loaded  ## Emitted when a new font has been loaded, or an old one gets unloaded.
 
-enum LayerTypes { PIXEL, GROUP, THREE_D }
+enum LayerTypes { PIXEL, GROUP, THREE_D, TILEMAP }
 enum GridTypes { CARTESIAN, ISOMETRIC, ALL }
 ## ## Used to tell whether a color is being taken from the current theme,
 ## or if it is a custom color.

src/Classes/Cels/CelTileMap.gd

@@ -0,0 +1,44 @@
+class_name CelTileMap
+extends PixelCel
+
+enum TileEditingMode { MANUAL, AUTO, STACK }
+
+var tileset: TileSetCustom
+var tile_editing_mode := TileEditingMode.MANUAL
+var indices := PackedInt32Array()
+var indices_x: int
+var indices_y: int
+
+
+func _init(_tileset: TileSetCustom, _image := Image.new(), _opacity := 1.0) -> void:
+	super._init(_image, _opacity)
+	tileset = _tileset
+	indices_x = ceili(float(get_image().get_width()) / tileset.tile_size.x)
+	indices_y = ceili(float(get_image().get_height()) / tileset.tile_size.y)
+	indices.resize(indices_x * indices_y)
+
+
+func update_texture() -> void:
+	super.update_texture()
+	for i in indices.size():
+		var x_coord := float(tileset.tile_size.x) * (i % indices_x)
+		var y_coord := float(tileset.tile_size.y) * (i / indices_x)
+		var rect := Rect2i(Vector2i(x_coord, y_coord), tileset.tile_size)
+		var image_portion := image.get_region(rect)
+		var index := indices[i]
+		if tile_editing_mode == TileEditingMode.MANUAL:
+			if index == 0:
+				continue
+			if image_portion.get_data() != tileset.tiles[index].get_data():
+				tileset.tiles[index].copy_from(image_portion)
+		elif tile_editing_mode == TileEditingMode.AUTO:
+			if index == 0:
+				continue
+		else:
+			if not image_portion.is_invisible():
+				tileset.tiles.append(image_portion)
+				indices[i] = tileset.tiles.size()
+
+
+func get_class_name() -> String:
+	return "CelTileMap"

src/Classes/Layers/LayerTileMap.gd

@@ -0,0 +1,19 @@
+class_name LayerTileMap
+extends PixelLayer
+
+var tileset: TileSetCustom
+
+
+func _init(_project: Project, _tileset: TileSetCustom, _name := "") -> void:
+	super._init(_project, _name)
+	tileset = _tileset
+
+
+# Overridden Methods:
+func get_layer_type() -> int:
+	return Global.LayerTypes.TILEMAP
+
+
+func new_empty_cel() -> BaseCel:
+	var image := Image.create(project.size.x, project.size.y, false, Image.FORMAT_RGBA8)
+	return CelTileMap.new(tileset, image)

src/Classes/TileSetCustom.gd

@@ -0,0 +1,16 @@
+class_name TileSetCustom
+extends RefCounted
+
+var name := ""
+var tile_size: Vector2i
+var tiles: Array[Image] = []
+
+
+func _init(_tile_size: Vector2i, _name := "") -> void:
+	tile_size = _tile_size
+	name = _name
+	#var indices_x := ceili(float(_project_size.x) / tile_size.x)
+	#var indices_y := ceili(float(_project_size.y) / tile_size.y)
+	#tiles.resize(indices_x * indices_y + 1)
+	var empty_image := Image.create_empty(tile_size.x, tile_size.y, false, Image.FORMAT_RGBA8)
+	tiles.append(empty_image)