Added Open & Save buttons for the shader, some code improvements and bugfixes, open window maximized per default - closes #3

src/Camera.gd

@@ -18,14 +18,15 @@ func _input(event):
 		global_position -= event.relative / zoom
 
 func fit_image():
-	var ui_container_size = user_interface_container.size
-	var image_size = image_viewport.image_original_tex.get_size()
-	var viewport_size = get_viewport_rect().size
-	var zoomf = (viewport_size.x - ui_container_size.x) / image_size.x / 1.1
-	if zoomf * image_size.y > viewport_size.y:
-		zoomf = viewport_size.y / image_size.y / 1.1
-	zoom = Vector2(zoomf, zoomf)
-	global_position = Vector2(-((ui_container_size.x) / 2 / zoom.x), 0)
+	if image_viewport.image_original_tex != null:
+		var ui_container_size = user_interface_container.size
+		var image_size = image_viewport.image_original_tex.get_size()
+		var viewport_size = get_viewport_rect().size
+		var zoomf = (viewport_size.x - ui_container_size.x) / image_size.x / 1.1
+		if zoomf * image_size.y > viewport_size.y:
+			zoomf = viewport_size.y / image_size.y / 1.1
+		zoom = Vector2(zoomf, zoomf)
+		global_position = Vector2(-((ui_container_size.x) / 2 / zoom.x), 0)
 
 func zoom_in():
 	var old_mouse_pos = get_global_mouse_position()

src/Editor.gd

@@ -2,6 +2,8 @@ extends Control
 
 @onready var preset_options = $PresetOptions
 @onready var code_editor = $CodeEdit
+@onready var open_shader_dialog = $OpenShaderDialog
+@onready var save_shader_dialog = $SaveShaderDialog
 var selected_preset_name = ShaderPresets.default_preset
 
 # # # # # # # # # # #
@@ -210,3 +212,24 @@ func update():
 	preset_options.select(current_p_idx)
 	# weirdness ends here
 	code_editor.text = Globals.shader.code
+
+func _on_open_shader_button_pressed():
+	open_shader_dialog.show()
+
+func _on_save_shader_button_pressed():
+	save_shader_dialog.current_file = selected_preset_name + "_custom.gdshader"
+	save_shader_dialog.show()
+
+func _on_open_shader_dialog_file_selected(path):
+	var file = FileAccess.open(path, FileAccess.READ)
+	var shader_code = file.get_as_text()
+	var shader = Shader.new()
+	shader.code = shader_code
+	Globals.shader = shader
+	Globals.target_viewport.update()
+	update()
+
+func _on_save_shader_dialog_file_selected(path):
+	var file = FileAccess.open(path, FileAccess.WRITE)
+	var content = Globals.shader.code
+	file.store_string(content)

src/Main.gd

@@ -3,19 +3,16 @@ extends Node2D
 @onready var camera = $Camera
 @onready var image_viewport = $ImageViewport
 @onready var ui_container = $UI_Layer/UserInterfaceContainer
-@onready var ui_control_fileopen = $UI_Layer/UserInterfaceContainer/OpenFileDialog
-@onready var ui_control_filesave = $UI_Layer/UserInterfaceContainer/SaveFileDialog
+@onready var ui_control_fileopen = $UI_Layer/UserInterfaceContainer/OpenImageDialog
+@onready var ui_control_filesave = $UI_Layer/UserInterfaceContainer/SaveImageDialog
 
 func _ready():
 	Globals.target_viewport = image_viewport
 
 func _on_open_image_button_pressed():
-	if OS.get_name() == "Android":
-		Engine.get_singleton("GodotGetImage").getGalleryImage()
-	else:
-		ui_control_fileopen.show()
+	ui_control_fileopen.show()
 
-func _on_open_file_dialog_file_selected(path):
+func _on_open_image_dialog_file_selected(path):
 	var img = Image.new()
 	var err = img.load(path)
 	if err == OK:
@@ -26,9 +23,11 @@ func _on_open_file_dialog_file_selected(path):
 		print("An error occured!")
 
 func _on_save_image_button_pressed():
-	ui_control_filesave.show()
+	if image_viewport.get_result() != null:
+		ui_control_filesave.current_file = "image.png"
+		ui_control_filesave.show()
 
-func _on_save_file_dialog_file_selected(path):
+func _on_save_image_dialog_file_selected(path):
 	var err = image_viewport.get_result().save_png(path)
 	if err != OK:
 		print("An error occured!")