Add fallbacks and mention non-working features when using Compatibility or the Web platform (#1132)

- Make 3D lights with shadows darker when using Compatibility to better
  match the appearance of Forward+/Mobile, due to the use of sRGB blending
  for those lights.
- Silence some warnings when running projects with the Compatibility
  rendering method, such as the one about 2D MSAA not being supported.
- Rebake lightmaps in Global Illumination to improve quality and reduce
  light leaking with improvements from 4.3.
  - Increase probe density for dynamic objects, and mark the moving box
    as a dynamic object for GI purposes.

This is done to improve the experience with the web-based demos,
which always run with the Compatibility rendering method.

misc/os_test/actions.gd

@@ -1,5 +1,21 @@
 extends Node
 
+func _ready() -> void:
+	if OS.has_feature("web"):
+		for button: Button in [
+			$GridContainer/OpenShellFolder,
+			$GridContainer/MoveWindowToForeground,
+			$GridContainer/RequestAttention,
+			$GridContainer/VibrateDeviceShort,
+			$GridContainer/VibrateDeviceLong,
+			$GridContainer/AddGlobalMenuItems,
+			$GridContainer/RemoveGlobalMenuItem,
+			$GridContainer/KillCurrentProcess,
+		]:
+			button.disabled = true
+			button.text += "\n(not supported on Web)"
+
+
 func _on_open_shell_web_pressed() -> void:
 	OS.shell_open("https://example.com")
 

misc/os_test/os_test.gd

@@ -211,7 +211,7 @@ func _ready() -> void:
 	add_header("Video")
 	add_line("Adapter name", RenderingServer.get_video_adapter_name())
 	add_line("Adapter vendor", RenderingServer.get_video_adapter_vendor())
-	if ProjectSettings.get_setting_with_override("rendering/renderer/rendering_method") != "gl_compatibility":
+	if RenderingServer.get_current_rendering_method() != "gl_compatibility":
 		# Querying the adapter type isn't supported in Compatibility.
 		add_line("Adapter type", [
 			"Other (Unknown)",

misc/window_management/control.gd

@@ -4,7 +4,22 @@ var mouse_position := Vector2()
 
 @onready var observer: CharacterBody3D = $"../Observer"
 
+
 func _ready() -> void:
+	if OS.has_feature("web"):
+		for button: BaseButton in [
+			$Buttons/Button_FixedSize,
+			$Buttons/Button_Minimized,
+			$Buttons/Button_Maximized,
+			$Buttons/Button_MoveTo,
+			$Buttons/Button_Resize,
+			$Buttons/Button_MouseModeConfined,
+			$Buttons/Button_MouseModeConfinedHidden,
+			$CheckButton,
+		]:
+			button.disabled = true
+			button.text += " (not supported on Web)"
+
 	if not check_wm_api():
 		set_physics_process(false)
 		set_process_input(false)
@@ -35,7 +50,8 @@ func _physics_process(_delta: float) -> void:
 	$Labels/Label_Mode.text = modetext
 	$Labels/Label_Position.text = str("Position: ", DisplayServer.window_get_position())
 	$Labels/Label_Size.text = str("Size: ", DisplayServer.window_get_size())
-	$Labels/Label_MousePosition.text = str("Mouse Position: ", mouse_position)
+	# Pad decimals when showing mouse position, as some platforms report floating-point mouse positions.
+	$Labels/Label_MousePosition.text = str("Mouse Position: %.4v" % mouse_position)
 	$Labels/Label_Screen_Count.text = str("Screen_Count: ", DisplayServer.get_screen_count())
 	$Labels/Label_Screen_Current.text = str("Screen: ", DisplayServer.window_get_current_screen())
 	$Labels/Label_Screen0_Resolution.text = str("Screen0 Resolution:\n", DisplayServer.screen_get_size())

misc/window_management/observer/observer.gd

@@ -12,6 +12,7 @@ var state := State.MENU
 
 @onready var camera: Camera3D = $Camera3D
 
+
 func _process(delta: float) -> void:
 	if state != State.GRAB:
 		return

misc/window_management/window_management.tscn

@@ -135,7 +135,7 @@ metadata/_edit_use_custom_anchors = false
 layout_mode = 2
 size_flags_horizontal = 2
 size_flags_vertical = 0
-text = "MouseModes:"
+text = "Mouse Modes:"
 metadata/_edit_layout_mode = 1
 metadata/_edit_use_custom_anchors = false