godot-demo-projects/2d/screen_space_shaders/screen_shaders.tscn

[gd_scene load_steps=31 format=2]

[ext_resource path="res://screen_shaders.gd" type="Script" id=1]
[ext_resource path="res://art/burano.jpg" type="Texture" id=2]
[ext_resource path="res://art/platformer.jpg" type="Texture" id=3]
[ext_resource path="res://art/mountains.jpg" type="Texture" id=4]
[ext_resource path="res://art/forest.jpg" type="Texture" id=5]
[ext_resource path="res://art/vignette.png" type="Texture" id=6]
[ext_resource path="res://art/white.png" type="Texture" id=7]
[ext_resource path="res://art/filmgrain.png" type="Texture" id=8]

[sub_resource type="Shader" id=1]
code = "shader_type canvas_item;

uniform sampler2D vignette;

void fragment() {
	vec3 vignette_color = texture(vignette, UV).rgb;
	// Screen texture stores gaussian blurred copies on mipmaps
	COLOR.rgb = textureLod(SCREEN_TEXTURE, SCREEN_UV, (1.0 - vignette_color.r) * 4.0).rgb;
	COLOR.rgb *= texture(vignette, UV).rgb;
}"

[sub_resource type="ShaderMaterial" id=2]
shader = SubResource( 1 )
shader_param/vignette = ExtResource( 6 )

[sub_resource type="Shader" id=3]
code = "shader_type canvas_item;

uniform float amount : hint_range(0.0, 5.0);

void fragment() {

	COLOR.rgb = textureLod(SCREEN_TEXTURE, SCREEN_UV, amount).rgb;
}"

[sub_resource type="ShaderMaterial" id=4]
shader = SubResource( 3 )
shader_param/amount = 4.0

[sub_resource type="Shader" id=5]
code = "shader_type canvas_item;

uniform float size_x = 0.008;
uniform float size_y = 0.008;

void fragment() {
	vec2 uv = SCREEN_UV;
	uv -= mod(uv, vec2(size_x, size_y));
	
	COLOR.rgb = textureLod(SCREEN_TEXTURE, uv, 0.0).rgb;
}
"

[sub_resource type="ShaderMaterial" id=6]
shader = SubResource( 5 )
shader_param/size_x = 0.008
shader_param/size_y = 0.008

[sub_resource type="Shader" id=7]
code = "shader_type canvas_item;

uniform float rotation = 3.0;

void fragment() {
	vec2 uv = SCREEN_UV;
	vec2 rel = uv - vec2(0.5, 0.5);
	float angle = length(rel) * rotation;
	mat2 rot = mat2(vec2(cos(angle), -sin(angle)), vec2(sin(angle), cos(angle)));
	rel = rot * rel;
	uv = clamp(rel + vec2(0.5,0.5), vec2(0.0, 0.0), vec2(1.0, 1.0));
	COLOR.rgb = textureLod(SCREEN_TEXTURE, uv, 0.0).rgb;
}
"

[sub_resource type="ShaderMaterial" id=8]
shader = SubResource( 7 )
shader_param/rotation = 3.0

[sub_resource type="Shader" id=9]
code = "shader_type canvas_item;

uniform vec4 base : hint_color;

void fragment() {
	vec3 c = textureLod(SCREEN_TEXTURE, SCREEN_UV, 0.0).rgb;
	
	//float v = max(c.r, max(c.g, c.b));
	float v = dot(c, vec3(0.33333, 0.33333, 0.33333));
	v = sqrt(v);
	//v *= v;
	COLOR.rgb = base.rgb * v;

}"

[sub_resource type="ShaderMaterial" id=10]
shader = SubResource( 9 )
shader_param/base = Color( 0.54451, 0.408353, 0.403137, 1 )

[sub_resource type="Shader" id=11]
code = "shader_type canvas_item;

void fragment() {

	vec3 c = textureLod(SCREEN_TEXTURE, SCREEN_UV, 0.0).rgb;
	c = vec3(1.0) - c;
	COLOR.rgb = c;
}
"

[sub_resource type="ShaderMaterial" id=12]
shader = SubResource( 11 )

[sub_resource type="Shader" id=13]
code = "shader_type canvas_item;

void fragment() {

	vec3 c = textureLod(SCREEN_TEXTURE, SCREEN_UV, 0.0).rgb;
	c = mod(c + vec3(0.5), vec3(1.0));
	COLOR.rgb = c;
}
"

[sub_resource type="ShaderMaterial" id=14]
shader = SubResource( 13 )

[sub_resource type="Shader" id=15]
code = "shader_type canvas_item;

void fragment() {
	vec3 c = textureLod(SCREEN_TEXTURE, SCREEN_UV, 0.0).rgb;
	COLOR.rgb = normalize(c);
}
"

[sub_resource type="ShaderMaterial" id=16]
shader = SubResource( 15 )

[sub_resource type="Shader" id=17]
code = "shader_type canvas_item;

uniform float brightness = 0.8;
uniform float contrast = 1.5;
uniform float saturation = 1.8;

void fragment() {

	vec3 c = textureLod(SCREEN_TEXTURE, SCREEN_UV, 0.0).rgb;
	
	c.rgb = mix(vec3(0.0), c.rgb, brightness);
	c.rgb = mix(vec3(0.5), c.rgb, contrast);
	c.rgb = mix(vec3(dot(vec3(1.0), c.rgb) * 0.33333), c.rgb, saturation);
	
	COLOR.rgb = c;
}
"

[sub_resource type="ShaderMaterial" id=18]
shader = SubResource( 17 )
shader_param/brightness = 0.8
shader_param/contrast = 1.5
shader_param/saturation = 1.8

[sub_resource type="Shader" id=19]
code = "shader_type canvas_item;

uniform float frequency = 60;
uniform float depth = 0.005;

void fragment() {
	
	vec2 uv = SCREEN_UV;
	uv.x += sin(uv.y * frequency + TIME) * depth;
	uv.x = clamp(uv.x, 0.0, 1.0);
	vec3 c = textureLod(SCREEN_TEXTURE, uv, 0.0).rgb;
	
	COLOR.rgb = c;
}
"

[sub_resource type="ShaderMaterial" id=20]
shader = SubResource( 19 )
shader_param/frequency = 60.0
shader_param/depth = 0.005

[sub_resource type="Shader" id=21]
code = "shader_type canvas_item;

uniform vec4 base : hint_color;
uniform sampler2D grain;
uniform float grain_strength = 0.3;
uniform sampler2D vignette;
uniform float fps = 12.0;
uniform float stretch = 0.5;
uniform float flashing = 0.01;

float make_grain(float time, vec2 uv) {

	vec2 ofs = vec2(sin(41.0 * time * sin(time * 123.0)), sin(27.0 * time * sin(time * 312.0)));
	return texture(grain, (uv + mod(ofs, vec2(1.0, 1.0))) * stretch).r;
}

void fragment() {
	vec3 c = textureLod(SCREEN_TEXTURE, SCREEN_UV, 0.0).rgb;
	
	//float v = max(c.r, max(c.g, c.b));
	float v = dot(c, vec3(0.33333, 0.33333, 0.33333));
	v = sqrt(v);
	//v *= v;
	
	float f = 1.0 / fps;
	float g = make_grain(TIME - mod(TIME, f), UV);
	g = max(g, make_grain(TIME - mod(TIME, f) + f, UV) * 0.5);
	g = max(g, make_grain(TIME - mod(TIME, f) + f * 2.0, UV) * 0.25);
	
	COLOR.rgb = base.rgb * v - vec3(g) * grain_strength;
	COLOR.rgb *= texture(vignette, UV).r;
	float ft = TIME * 0.002;
	COLOR.rgb += vec3(sin(75.0 * ft * sin(ft * 123.0))) * flashing;
}
"

[sub_resource type="ShaderMaterial" id=22]
shader = SubResource( 21 )
shader_param/base = Color( 0.450274, 0.361255, 0.335059, 1 )
shader_param/grain_strength = 0.3
shader_param/fps = 12
shader_param/stretch = 0.5
shader_param/flashing = 0.01
shader_param/grain = ExtResource( 8 )
shader_param/vignette = ExtResource( 6 )

[node name="Control" type="Control"]
anchor_right = 1.0
anchor_bottom = 1.0
size_flags_horizontal = 2
size_flags_vertical = 2
script = ExtResource( 1 )

[node name="pictures" type="Control" parent="."]
anchor_right = 1.0
anchor_bottom = 1.0
size_flags_horizontal = 2
size_flags_vertical = 2

[node name="burano" type="TextureRect" parent="pictures"]
margin_right = 40.0
margin_bottom = 40.0
size_flags_horizontal = 2
size_flags_vertical = 2
texture = ExtResource( 2 )

[node name="roby" type="TextureRect" parent="pictures"]
visible = false
margin_right = 40.0
margin_bottom = 40.0
size_flags_horizontal = 2
size_flags_vertical = 2
texture = ExtResource( 3 )

[node name="mountains" type="TextureRect" parent="pictures"]
visible = false
margin_right = 40.0
margin_bottom = 40.0
size_flags_horizontal = 2
size_flags_vertical = 2
texture = ExtResource( 4 )

[node name="forest" type="TextureRect" parent="pictures"]
visible = false
margin_right = 40.0
margin_bottom = 40.0
size_flags_horizontal = 2
size_flags_vertical = 2
texture = ExtResource( 5 )

[node name="effects" type="Control" parent="."]
anchor_right = 1.0
anchor_bottom = 1.0
size_flags_horizontal = 2
size_flags_vertical = 2

[node name="disabled" type="Control" parent="effects"]
visible = false
margin_right = 40.0
margin_bottom = 40.0
size_flags_horizontal = 2
size_flags_vertical = 2

[node name="vignette" type="TextureRect" parent="effects"]
visible = false
material = SubResource( 2 )
anchor_right = 1.0
anchor_bottom = 1.0
size_flags_horizontal = 2
size_flags_vertical = 2
texture = ExtResource( 7 )
expand = true

[node name="blur" type="TextureRect" parent="effects"]
visible = false
material = SubResource( 4 )
anchor_right = 1.0
anchor_bottom = 1.0
size_flags_horizontal = 2
size_flags_vertical = 2
texture = ExtResource( 7 )
expand = true

[node name="pixelize" type="TextureRect" parent="effects"]
visible = false
material = SubResource( 6 )
anchor_right = 1.0
anchor_bottom = 1.0
size_flags_horizontal = 2
size_flags_vertical = 2
texture = ExtResource( 7 )
expand = true

[node name="whirl" type="TextureRect" parent="effects"]
visible = false
material = SubResource( 8 )
anchor_right = 1.0
anchor_bottom = 1.0
size_flags_horizontal = 2
size_flags_vertical = 2
texture = ExtResource( 7 )
expand = true

[node name="sepia" type="TextureRect" parent="effects"]
visible = false
material = SubResource( 10 )
anchor_right = 1.0
anchor_bottom = 1.0
margin_right = 14.0
margin_bottom = -2.0
size_flags_horizontal = 2
size_flags_vertical = 2
texture = ExtResource( 7 )
expand = true

[node name="negative" type="TextureRect" parent="effects"]
visible = false
material = SubResource( 12 )
anchor_right = 1.0
anchor_bottom = 1.0
size_flags_horizontal = 2
size_flags_vertical = 2
texture = ExtResource( 7 )
expand = true

[node name="contrasted" type="TextureRect" parent="effects"]
visible = false
material = SubResource( 14 )
anchor_right = 1.0
anchor_bottom = 1.0
size_flags_horizontal = 2
size_flags_vertical = 2
texture = ExtResource( 7 )
expand = true

[node name="normalized" type="TextureRect" parent="effects"]
visible = false
material = SubResource( 16 )
anchor_right = 1.0
anchor_bottom = 1.0
size_flags_horizontal = 2
size_flags_vertical = 2
texture = ExtResource( 7 )
expand = true

[node name="BCS" type="TextureRect" parent="effects"]
visible = false
material = SubResource( 18 )
anchor_right = 1.0
anchor_bottom = 1.0
margin_top = 3.0
margin_bottom = -3.0
size_flags_horizontal = 2
size_flags_vertical = 2
texture = ExtResource( 7 )
expand = true

[node name="mirage" type="TextureRect" parent="effects"]
visible = false
material = SubResource( 20 )
anchor_right = 1.0
anchor_bottom = 1.0
size_flags_horizontal = 2
size_flags_vertical = 2
texture = ExtResource( 7 )
expand = true

[node name="old_film" type="TextureRect" parent="effects"]
visible = false
material = SubResource( 22 )
anchor_right = 1.0
anchor_bottom = 1.0
margin_left = -3.0
margin_right = 3.0
size_flags_horizontal = 2
size_flags_vertical = 2
texture = ExtResource( 7 )
expand = true

[node name="picture" type="OptionButton" parent="."]
margin_left = 8.0
margin_top = 7.0
margin_right = 131.0
margin_bottom = 28.0
size_flags_horizontal = 2
size_flags_vertical = 2

[node name="effect" type="OptionButton" parent="."]
margin_left = 137.0
margin_top = 7.0
margin_right = 260.0
margin_bottom = 28.0
size_flags_horizontal = 2
size_flags_vertical = 2

[connection signal="item_selected" from="picture" to="." method="_on_picture_item_selected"]
[connection signal="item_selected" from="effect" to="." method="_on_effect_item_selected"]