Add modified Fragmented project files

src/Camera.gd

@@ -0,0 +1,50 @@
+extends Camera2D
+
+@onready var image_viewport_display = %ImageViewportDisplay
+
+var drag = false
+
+func _input(event):
+	if event.is_action_pressed("zoom_out"):
+		zoom_out()
+	elif event.is_action_pressed("zoom_in"):
+		zoom_in()
+	if event.is_action_pressed("drag"):
+		self.drag = true
+	elif event.is_action_released("drag"):
+		self.drag = false
+	if self.drag && event is InputEventMouseMotion:
+		self.global_position -= event.relative / self.zoom
+
+var old_zoom = self.zoom
+
+func _process(_delta: float) -> void:
+	if self.zoom != old_zoom:
+		image_viewport_display.update_zoom_texture_filter(self.zoom)
+		image_viewport_display.material.set_shader_parameter("zoom_level", self.zoom)
+		old_zoom = self.zoom
+
+func fit_image():
+	if Filesystem.original_image != null:
+		var image_size = Filesystem.original_image.get_size()
+		var viewport_size = get_viewport_rect().size
+		var zoomf = 1.0
+		if viewport_size.x / image_size.x * image_size.y > viewport_size.y:
+			zoomf = viewport_size.y / image_size.y / 1.25
+		else:
+			zoomf = viewport_size.x / image_size.x / 1.2 
+		self.zoom = Vector2(zoomf, zoomf)
+		self.global_position = Vector2(0, 0)
+
+func zoom_in():
+	var old_mouse_pos = get_global_mouse_position()
+	self.zoom *= 1.2
+	self.global_position += old_mouse_pos - get_global_mouse_position()
+
+func zoom_out():
+	var old_mouse_pos = get_global_mouse_position()
+	self.zoom *= 1/1.2
+	self.global_position += old_mouse_pos - get_global_mouse_position()
+
+func _on_fit_image_button_pressed():
+	fit_image()