Add resolution-independent pixelation

main/main.gd

@@ -30,6 +30,9 @@ const UIPixelationPresenterType = preload(
 const PixelationResetOverlayType = preload(
 	"res://ui/pixelation_reset_overlay.gd"
 )
+const WorldPixelationPostprocessType = preload(
+	"res://main/world_pixelation_postprocess.gd"
+)
 
 const TITLE_MUSIC_SILENCE_DB: float = -80.0
 
@@ -53,6 +56,9 @@ const TITLE_MUSIC_SILENCE_DB: float = -80.0
 @onready var _pixelation_reset: PixelationResetOverlayType = (
 	%PixelationResetOverlay
 )
+@onready var _world_pixelation: WorldPixelationPostprocessType = (
+	%WorldPixelationPostprocess
+)
 
 var _gameplay_started: bool = false
 var _shop_interaction: FishingShopInteractionType
@@ -241,14 +247,7 @@ func _process(_delta: float) -> void:
 func _apply_runtime_settings(settings: PlayerSettingsType) -> void:
 	if settings == null:
 		return
-	var root_viewport: Viewport = get_viewport()
-	root_viewport.scaling_3d_mode = Viewport.SCALING_3D_MODE_NEAREST
-	root_viewport.scaling_3d_scale = PlayerSettingsType.get_world_render_scale(
-		settings.world_pixel_size
-	)
-	root_viewport.msaa_3d = Viewport.MSAA_DISABLED
-	root_viewport.screen_space_aa = Viewport.SCREEN_SPACE_AA_DISABLED
-	root_viewport.use_taa = false
+	_apply_world_pixelation(settings.world_pixel_size)
 	_ui_pixelation.set_pixel_size(settings.ui_pixel_size)
 	_game_ui.get_title_screen().set_world_pixelation(
 		settings.world_pixel_size
@@ -264,6 +263,16 @@ func _apply_runtime_settings(settings: PlayerSettingsType) -> void:
 	)
 
 
+func _apply_world_pixelation(pixel_size: int) -> void:
+	var root_viewport: Viewport = get_viewport()
+	root_viewport.scaling_3d_mode = Viewport.SCALING_3D_MODE_NEAREST
+	root_viewport.scaling_3d_scale = 1.0
+	root_viewport.msaa_3d = Viewport.MSAA_DISABLED
+	root_viewport.screen_space_aa = Viewport.SCREEN_SPACE_AA_DISABLED
+	root_viewport.use_taa = false
+	_world_pixelation.set_pixel_size(pixel_size)
+
+
 func _on_effective_ui_pixel_size_changed(
 	_requested_pixel_size: int,
 	effective_pixel_size: int,
@@ -281,6 +290,7 @@ func _reset_pixelation() -> void:
 
 func _set_gameplay_active(active: bool) -> void:
 	_gameplay_started = active
+	_world_pixelation.set_gameplay_active(active)
 	_ui_pixelation.set_gameplay_active(active)
 	if not active:
 		_player.item_effects.reset_all()

main/main.tscn

@@ -1,4 +1,4 @@
-[gd_scene load_steps=16 format=3]
+[gd_scene load_steps=17 format=3]
 
 [ext_resource type="PackedScene" path="res://world/test_world.tscn" id="1_world"]
 [ext_resource type="PackedScene" path="res://player/player.tscn" id="2_player"]
@@ -15,6 +15,7 @@
 [ext_resource type="AudioStream" path="res://audio/music/title/as_in_four_wolves.ogg" id="13_title_music"]
 [ext_resource type="Script" path="res://ui/ui_pixelation_presenter.gd" id="14_pixelation"]
 [ext_resource type="PackedScene" path="res://ui/pixelation_reset_overlay.tscn" id="15_reset"]
+[ext_resource type="PackedScene" path="res://main/world_pixelation_postprocess.tscn" id="16_world_pixelation"]
 
 [node name="Main" type="Node3D"]
 script = ExtResource("3_main")
@@ -53,6 +54,9 @@ stream = ExtResource("13_title_music")
 volume_db = -80.0
 bus = &"Music"
 
+[node name="WorldPixelationPostprocess" parent="." instance=ExtResource("16_world_pixelation")]
+unique_name_in_owner = true
+
 [node name="UIPresentation" type="SubViewportContainer" parent="."]
 unique_name_in_owner = true
 texture_filter = 1

main/world_pixelation_postprocess.gd

@@ -0,0 +1,51 @@
+class_name WorldPixelationPostprocess
+extends CanvasLayer
+
+@onready var _screen_grid: ColorRect = %ScreenGrid
+
+var _pixel_size: int = PlayerSettings.DEFAULT_WORLD_PIXEL_SIZE
+var _gameplay_active: bool = false
+
+
+func _ready() -> void:
+	get_viewport().size_changed.connect(_refresh_grid)
+	_refresh_grid()
+
+
+func set_pixel_size(pixel_size: int) -> void:
+	_pixel_size = clampi(
+		pixel_size,
+		PlayerSettings.MIN_WORLD_PIXEL_SIZE,
+		PlayerSettings.MAX_WORLD_PIXEL_SIZE
+	)
+	_refresh_grid()
+
+
+func set_gameplay_active(active: bool) -> void:
+	_gameplay_active = active
+	_refresh_grid()
+
+
+func get_grid_size() -> Vector2i:
+	return PlayerSettings.get_world_grid_size(
+		_pixel_size,
+		get_window().size
+	)
+
+
+func _refresh_grid() -> void:
+	if not is_node_ready():
+		return
+	var effect_enabled: bool = (
+		_gameplay_active
+		and _pixel_size != PlayerSettings.MIN_WORLD_PIXEL_SIZE
+	)
+	_screen_grid.visible = effect_enabled
+	if not effect_enabled:
+		return
+	var shader_material := _screen_grid.material as ShaderMaterial
+	if shader_material != null:
+		shader_material.set_shader_parameter(
+			"logical_grid_size",
+			Vector2(get_grid_size())
+		)

main/world_pixelation_postprocess.gd.uid

@@ -0,0 +1 @@
+uid://c3n47x8egoc8x

main/world_pixelation_postprocess.gdshader

@@ -0,0 +1,15 @@
+shader_type canvas_item;
+render_mode unshaded;
+
+uniform sampler2D screen_texture
+	: hint_screen_texture, filter_nearest, repeat_disable;
+uniform vec2 logical_grid_size = vec2(640.0, 360.0);
+
+
+void fragment() {
+	vec2 safe_grid = max(logical_grid_size, vec2(1.0));
+	vec2 snapped_uv = (
+		floor(SCREEN_UV * safe_grid) + vec2(0.5)
+	) / safe_grid;
+	COLOR = texture(screen_texture, snapped_uv);
+}

main/world_pixelation_postprocess.gdshader.uid

@@ -0,0 +1 @@
+uid://sq224d8sn1b4

main/world_pixelation_postprocess.tscn

@@ -0,0 +1,21 @@
+[gd_scene load_steps=3 format=3]
+
+[ext_resource type="Script" path="res://main/world_pixelation_postprocess.gd" id="1_script"]
+[ext_resource type="Shader" path="res://main/world_pixelation_postprocess.gdshader" id="2_shader"]
+
+[sub_resource type="ShaderMaterial" id="ShaderMaterial_world_pixelation"]
+shader = ExtResource("2_shader")
+
+[node name="WorldPixelationPostprocess" type="CanvasLayer"]
+layer = -1
+script = ExtResource("1_script")
+
+[node name="ScreenGrid" type="ColorRect" parent="."]
+unique_name_in_owner = true
+material = SubResource("ShaderMaterial_world_pixelation")
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+grow_horizontal = 2
+grow_vertical = 2
+mouse_filter = 2