From 73c65415f160b306c64d90143336fe06b60a6f62 Mon Sep 17 00:00:00 2001
From: yuki <yvki@riseup.net>
Date: Mon, 24 Nov 2025 17:35:50 -0300
Subject: [PATCH] add palette approx shader

---
 assets/palettes/forgotten.png        | Bin 0 -> 464 bytes
 assets/palettes/forgotten.png.import |  40 ++++++++++++++++++++
 scenes/room/room.tscn                |  19 +++++++++-
 scenes/worlds/test_room.tscn         |  53 +++++++++++++++++++++++++++
 shaders/palette.gdshader             |  19 ++++++++++
 shaders/palette.gdshader.uid         |   1 +
 6 files changed, 131 insertions(+), 1 deletion(-)
 create mode 100644 assets/palettes/forgotten.png
 create mode 100644 assets/palettes/forgotten.png.import
 create mode 100644 shaders/palette.gdshader
 create mode 100644 shaders/palette.gdshader.uid

diff --git a/assets/palettes/forgotten.png b/assets/palettes/forgotten.png
new file mode 100644
index 0000000000000000000000000000000000000000..ec2e75741c0d1ef6fefe74cadfa580172fe708be
GIT binary patch
literal 464
zcmV;>0WbcEP)<h;3K|Lk000e1NJLTq004jh000391^@s67Sg7+0004(Nkl<ZcmV~$
z%Z}1e0D$3tAQI_;(w1JJEeX&eAu&S+H!fVb_Dy_S$7m}kFmk7ymO_CUM;H2iH*dPZ
zzk5Yts0i*A1u?Wy-dc#E&GUTA?_XP<=UXEA!uS0jBKd;fDAIC@_>Cfl*F^VS46n&7
zPnhPCS)MQ-omh;I%tt4bhCnzKl!hR1d)&IW1a6N_c4d9MvdONbtAuo!lCBa|)udK6
zQB@PibFsZ9j^`p5IdYyO7de;Yk!v#Jl04EDHXUKn7B)f0Bxsui9h1W}<}islOk>7R
zk{{PS<0r{oSuiM9xGM|PL7(cNk2>g6c-Le8xM4b3G5NXXTlhdY`plQF4_L1Ybe$?)
zTczt%so5H;U881e#MwvAhZC1H=X^M^%VKuN9lI>1E)H0_hOO7IbPeCrX}KD{r*nx5
zT;dxpae<{wS;~~9Oxe835SmFvw-B01-8ZQFb?UxBdft<qW76}U<63gs>^ZI_O6@O(
zQKGJwFpLr{$E9UAX*n(*-hUztL!u}miXy@=B#I)!Fyud4ptu2iL-*|f0000<MNUMn
GLSTY}(a(|q

literal 0
HcmV?d00001

diff --git a/assets/palettes/forgotten.png.import b/assets/palettes/forgotten.png.import
new file mode 100644
index 0000000..0f77d8d
--- /dev/null
+++ b/assets/palettes/forgotten.png.import
@@ -0,0 +1,40 @@
+[remap]
+
+importer="texture"
+type="CompressedTexture2D"
+uid="uid://h5523ru86vrd"
+path="res://.godot/imported/forgotten.png-16ceeb0132426814a27475a2e3efca51.ctex"
+metadata={
+"vram_texture": false
+}
+
+[deps]
+
+source_file="res://assets/palettes/forgotten.png"
+dest_files=["res://.godot/imported/forgotten.png-16ceeb0132426814a27475a2e3efca51.ctex"]
+
+[params]
+
+compress/mode=0
+compress/high_quality=false
+compress/lossy_quality=0.7
+compress/uastc_level=0
+compress/rdo_quality_loss=0.0
+compress/hdr_compression=1
+compress/normal_map=0
+compress/channel_pack=0
+mipmaps/generate=false
+mipmaps/limit=-1
+roughness/mode=0
+roughness/src_normal=""
+process/channel_remap/red=0
+process/channel_remap/green=1
+process/channel_remap/blue=2
+process/channel_remap/alpha=3
+process/fix_alpha_border=true
+process/premult_alpha=false
+process/normal_map_invert_y=false
+process/hdr_as_srgb=false
+process/hdr_clamp_exposure=false
+process/size_limit=0
+detect_3d/compress_to=1
diff --git a/scenes/room/room.tscn b/scenes/room/room.tscn
index 3e661d1..ed6d609 100644
--- a/scenes/room/room.tscn
+++ b/scenes/room/room.tscn
@@ -1,4 +1,4 @@
-[gd_scene load_steps=8 format=3 uid="uid://bxhyxox662buj"]
+[gd_scene load_steps=11 format=3 uid="uid://bxhyxox662buj"]
 
 [ext_resource type="Script" uid="uid://pcl0om2k32g6" path="res://scenes/room/room.gd" id="1_8xru0"]
 [ext_resource type="Script" uid="uid://diou146pyb0br" path="res://scenes/room/room_camera.gd" id="3_y1kpu"]
@@ -7,11 +7,28 @@
 [ext_resource type="Script" uid="uid://d2xitfobwbk20" path="res://scenes/room/states/room_playing.gd" id="5_w7vtx"]
 [ext_resource type="Script" uid="uid://drnrd5xlt8imm" path="res://scenes/room/states/room_exiting.gd" id="6_7jj40"]
 [ext_resource type="Script" uid="uid://ceevyto3vbq7c" path="res://scenes/room/states/room_paused.gd" id="6_gui0a"]
+[ext_resource type="Shader" uid="uid://bxvmsjxx0tj21" path="res://shaders/palette.gdshader" id="8_dv301"]
+[ext_resource type="Texture2D" uid="uid://h5523ru86vrd" path="res://assets/palettes/forgotten.png" id="9_68b7a"]
+
+[sub_resource type="ShaderMaterial" id="ShaderMaterial_ip1yl"]
+shader = ExtResource("8_dv301")
+shader_parameter/palette = ExtResource("9_68b7a")
+shader_parameter/palette_size = 120
 
 [node name="Room" type="Node2D"]
 y_sort_enabled = true
 script = ExtResource("1_8xru0")
 
+[node name="CanvasLayer" type="CanvasLayer" parent="."]
+
+[node name="ColorRect" type="ColorRect" parent="CanvasLayer"]
+material = SubResource("ShaderMaterial_ip1yl")
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+grow_horizontal = 2
+grow_vertical = 2
+
 [node name="RoomDirector" type="Node" parent="." node_paths=PackedStringArray("initial_state")]
 process_mode = 3
 script = ExtResource("4_vaubn")
diff --git a/scenes/worlds/test_room.tscn b/scenes/worlds/test_room.tscn
index 783b298..3e67123 100644
--- a/scenes/worlds/test_room.tscn
+++ b/scenes/worlds/test_room.tscn
@@ -6,6 +6,7 @@
 
 [sub_resource type="Resource" id="Resource_t5fpq"]
 script = ExtResource("2_06s2n")
+initial_spawn = Vector2i(25, 40)
 loopable = true
 loop_size = Rect2i(0, 0, 320, 240)
 metadata/_custom_type_script = "uid://bamoq5wi0lkdy"
@@ -14,6 +15,58 @@ metadata/_custom_type_script = "uid://bamoq5wi0lkdy"
 config = SubResource("Resource_t5fpq")
 
 [node name="Sprite2D" type="Sprite2D" parent="." index="2"]
+z_index = 1
 position = Vector2(232, 144)
 texture = ExtResource("3_06s2n")
 offset = Vector2(0, -50)
+
+[node name="Sprite2D5" type="Sprite2D" parent="." index="3"]
+z_index = 1
+position = Vector2(232, 384)
+texture = ExtResource("3_06s2n")
+offset = Vector2(0, -50)
+
+[node name="Sprite2D2" type="Sprite2D" parent="." index="4"]
+z_index = 1
+position = Vector2(-88, 144)
+texture = ExtResource("3_06s2n")
+offset = Vector2(0, -50)
+
+[node name="Sprite2D3" type="Sprite2D" parent="." index="5"]
+z_index = 1
+position = Vector2(232, -104)
+texture = ExtResource("3_06s2n")
+offset = Vector2(0, -50)
+
+[node name="Sprite2D8" type="Sprite2D" parent="." index="6"]
+z_index = 1
+position = Vector2(552, -104)
+texture = ExtResource("3_06s2n")
+offset = Vector2(0, -50)
+
+[node name="Sprite2D9" type="Sprite2D" parent="." index="7"]
+z_index = 1
+position = Vector2(552, 384)
+texture = ExtResource("3_06s2n")
+offset = Vector2(0, -50)
+
+[node name="Sprite2D6" type="Sprite2D" parent="." index="8"]
+z_index = 1
+position = Vector2(-88, 384)
+texture = ExtResource("3_06s2n")
+offset = Vector2(0, -50)
+
+[node name="Sprite2D7" type="Sprite2D" parent="." index="9"]
+z_index = 1
+position = Vector2(-88, -104)
+texture = ExtResource("3_06s2n")
+offset = Vector2(0, -50)
+
+[node name="Sprite2D4" type="Sprite2D" parent="." index="10"]
+z_index = 1
+position = Vector2(552, 144)
+texture = ExtResource("3_06s2n")
+offset = Vector2(0, -50)
+
+[node name="ColorRect" parent="CanvasLayer" index="0"]
+metadata/_edit_lock_ = true
diff --git a/shaders/palette.gdshader b/shaders/palette.gdshader
new file mode 100644
index 0000000..a2ad675
--- /dev/null
+++ b/shaders/palette.gdshader
@@ -0,0 +1,19 @@
+shader_type canvas_item;
+
+uniform sampler2D SCREEN_TEXTURE : hint_screen_texture, filter_linear_mipmap;
+uniform sampler2D palette : hint_default_black; // Insert a palette from lospec for instance
+uniform int palette_size = 16;
+
+void fragment(){ 
+	vec4 color = texture(SCREEN_TEXTURE, SCREEN_UV);
+	vec4 new_color = vec4(.0);
+	
+	for (int i = 0; i < palette_size; i++) {
+		vec4 palette_color = texture(palette, vec2(1.0 / float(palette_size) * float(i), .0));
+		if (distance(palette_color, color) < distance(new_color, color)) {
+			new_color = palette_color;
+		}
+	}
+	
+	COLOR = new_color;
+}
\ No newline at end of file
diff --git a/shaders/palette.gdshader.uid b/shaders/palette.gdshader.uid
new file mode 100644
index 0000000..2e4b8b0
--- /dev/null
+++ b/shaders/palette.gdshader.uid
@@ -0,0 +1 @@
+uid://bxvmsjxx0tj21