Changed Export PNG settings, moved code from Main.gd to ExportSprites.gd

And made ExportSprites.tscn a scene of its own

Scripts/Dialogs/ExportSprites.gd

@@ -0,0 +1,104 @@
+extends FileDialog
+
+var current_export_path := ""
+var export_option := 0
+
+func _ready() -> void:
+	var children := []
+	for i in range(get_child_count()):
+		if i > 7:
+			children.append(get_child(i))
+
+	for child in children:
+		remove_child(child)
+		get_vbox().add_child(child)
+
+func _on_ExportOption_item_selected(ID : int) -> void:
+	export_option = ID
+
+func _on_ExportSprites_file_selected(path : String) -> void:
+	current_export_path = path
+	Global.file_menu.get_popup().set_item_text(5, tr("Export") + " %s" % path.get_file())
+	export_project()
+
+func export_project() -> void:
+	if export_option == 0: # Export current frame
+		save_sprite(Global.canvas, current_export_path)
+	elif export_option == 1: # Export all frames as multiple files
+		var i := 1
+		for canvas in Global.canvases:
+			var path := "%s_%s" % [current_export_path, str(i)]
+			path = path.replace(".png", "")
+			path = "%s.png" % path
+			save_sprite(canvas, path)
+			i += 1
+	else: # Export all frames as a spritesheet (single file)
+		save_spritesheet(export_option == 2)
+
+	Global.notification_label("File exported")
+
+func save_sprite(canvas : Canvas, path : String) -> void:
+	var whole_image := Image.new()
+	whole_image.create(canvas.size.x, canvas.size.y, false, Image.FORMAT_RGBA8)
+	whole_image.lock()
+	for layer in canvas.layers:
+		var img : Image = layer[0]
+		img.lock()
+		if layer[4] < 1: # If we have layer transparency
+			for xx in img.get_size().x:
+				for yy in img.get_size().y:
+					var pixel_color := img.get_pixel(xx, yy)
+					var alpha : float = pixel_color.a * layer[4]
+					img.set_pixel(xx, yy, Color(pixel_color.r, pixel_color.g, pixel_color.b, alpha))
+
+		canvas.blend_rect(whole_image, img, Rect2(canvas.position, canvas.size), Vector2.ZERO)
+		layer[0].lock()
+	var err = whole_image.save_png(path)
+	if err != OK:
+		OS.alert("Can't save file")
+
+func save_spritesheet(horizontal : bool) -> void:
+	var width
+	var height
+	if horizontal: # Horizontal spritesheet
+		width = 0
+		height = Global.canvas.size.y
+		for canvas in Global.canvases:
+			width += canvas.size.x
+			if canvas.size.y > height:
+				height = canvas.size.y
+	else: # Vertical spritesheet
+		width = Global.canvas.size.x
+		height = 0
+		for canvas in Global.canvases:
+			height += canvas.size.y
+			if canvas.size.x > width:
+				width = canvas.size.x
+
+	var whole_image := Image.new()
+	whole_image.create(width, height, false, Image.FORMAT_RGBA8)
+	whole_image.lock()
+	var dst := Vector2.ZERO
+	for canvas in Global.canvases:
+		for layer in canvas.layers:
+			var img : Image = layer[0]
+			img.lock()
+			if layer[4] < 1: # If we have layer transparency
+				for xx in img.get_size().x:
+					for yy in img.get_size().y:
+						var pixel_color := img.get_pixel(xx, yy)
+						var alpha : float = pixel_color.a * layer[4]
+						img.set_pixel(xx, yy, Color(pixel_color.r, pixel_color.g, pixel_color.b, alpha))
+
+			canvas.blend_rect(whole_image, img, Rect2(canvas.position, canvas.size), dst)
+			layer[0].lock()
+
+		if horizontal:
+			dst += Vector2(canvas.size.x, 0)
+		else:
+			dst += Vector2(0, canvas.size.y)
+
+	var err = whole_image.save_png(current_export_path)
+	if err != OK:
+		OS.alert("Can't save file")
+

Scripts/Dialogs/ImportSprites.gd

@@ -5,7 +5,7 @@ var import_spritesheet := false
 var spritesheet_horizontal := 1
 var spritesheet_vertical := 1
 
-func _ready():
+func _ready() -> void:
 	var children := []
 	for i in range(get_child_count()):
 		if i > 7:
@@ -44,7 +44,7 @@ func _on_ImportSprites_files_selected(paths : PoolStringArray) ->  void:
 		for path in paths:
 			var image := Image.new()
 			var err := image.load(path)
-			if err != OK: #An error occured
+			if err != OK: # An error occured
 				OS.alert("Can't load file")
 				continue
 
@@ -74,7 +74,7 @@ func _on_ImportSprites_files_selected(paths : PoolStringArray) ->  void:
 	else:
 		var image := Image.new()
 		var err := image.load(first_path)
-		if err != OK: #An error occured
+		if err != OK: # An error occured
 			OS.alert("Can't load file")
 			return