material-maker/material_maker/widgets/histogram/histogram.tscn

[gd_scene load_steps=14 format=2]

[ext_resource path="res://material_maker/widgets/histogram/histogram.gd" type="Script" id=1]

[sub_resource type="Shader" id=1]
resource_local_to_scene = true
code = "shader_type canvas_item;
render_mode blend_disabled;

uniform sampler2D tex;

void fragment() {
	COLOR = texture(tex, UV);
}
"

[sub_resource type="ImageTexture" id=2]
resource_local_to_scene = true

[sub_resource type="ShaderMaterial" id=3]
resource_local_to_scene = true
shader = SubResource( 1 )
shader_param/tex = SubResource( 2 )

[sub_resource type="Shader" id=4]
code = "shader_type canvas_item;
render_mode blend_disabled;

uniform sampler2D tex;

void fragment() {
	vec4 sum = vec4(0.0);
	for (int i = 0; i < 128; ++i) {
		sum += step(abs(texture(tex, vec2(UV.x, float(i)/127.0))-UV.y), vec4(0.02));
	}
	COLOR = sum/255.0;
}
"

[sub_resource type="ViewportTexture" id=5]
viewport_path = NodePath("ViewportImage")

[sub_resource type="ShaderMaterial" id=6]
resource_local_to_scene = true
shader = SubResource( 4 )
shader_param/tex = SubResource( 5 )

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

uniform sampler2D tex;

void fragment() {
	vec4 sum = vec4(0.0);
	for (int i = 0; i < 128; ++i) {
		sum += texture(tex, vec2(float(i)/127.0, UV.x));
	}
	COLOR = sum/255.0;
}"

[sub_resource type="ViewportTexture" id=8]
viewport_path = NodePath("ViewportHistogram1")

[sub_resource type="ShaderMaterial" id=9]
resource_local_to_scene = true
shader = SubResource( 7 )
shader_param/tex = SubResource( 8 )

[sub_resource type="Shader" id=10]
code = "shader_type canvas_item;

uniform sampler2D tex;
render_mode blend_disabled;

void fragment() {
	if (abs(fract(UV.y+0.05)) < 0.1) {
		COLOR = vec4(vec3(UV.x), 1.0);
	} else {
		vec4 highest = vec4(0.0);
		for (int i = 0; i < 128; ++i) {
			highest = max(highest, texture(tex, vec2(float(i)/128.0, 0.0)));
		}
		vec4 value = step(vec4(0.95-UV.y)*highest/0.9, texture(tex, vec2(UV.x, 0.0)));
		float alpha = step(0.1, dot(value, vec4(1.0)));
		COLOR = vec4(mix(value.rgb, vec3(0.5), 0.3*value.a), alpha);
	}
}"

[sub_resource type="ViewportTexture" id=11]
flags = 4
viewport_path = NodePath("ViewportHistogram2")

[sub_resource type="ShaderMaterial" id=12]
resource_local_to_scene = true
shader = SubResource( 10 )
shader_param/tex = SubResource( 11 )

[node name="Histogram" type="Control" groups=[
"preview",
]]
margin_right = 64.0
margin_bottom = 64.0
script = ExtResource( 1 )
__meta__ = {
"_edit_use_anchors_": false
}

[node name="ViewportImage" type="Viewport" parent="."]
size = Vector2( 256, 256 )
transparent_bg = true
hdr = false
usage = 0
render_target_v_flip = true
render_target_update_mode = 1

[node name="ColorRect" type="ColorRect" parent="ViewportImage"]
material = SubResource( 3 )
margin_right = 256.0
margin_bottom = 128.0
rect_min_size = Vector2( 256, 256 )

[node name="ViewportHistogram1" type="Viewport" parent="."]
size = Vector2( 128, 128 )
own_world = true
transparent_bg = true
disable_3d = true
keep_3d_linear = true
render_target_v_flip = true
render_target_update_mode = 1

[node name="ColorRect" type="ColorRect" parent="ViewportHistogram1"]
material = SubResource( 6 )
margin_right = 128.0
margin_bottom = 128.0
rect_min_size = Vector2( 128, 128 )

[node name="ViewportHistogram2" type="Viewport" parent="."]
size = Vector2( 128, 2 )
transparent_bg = true
disable_3d = true
keep_3d_linear = true
render_target_v_flip = true
render_target_update_mode = 3

[node name="ColorRect" type="ColorRect" parent="ViewportHistogram2"]
material = SubResource( 9 )
margin_right = 128.0
margin_bottom = 2.0
rect_min_size = Vector2( 128, 2 )

[node name="Control" type="ColorRect" parent="."]
material = SubResource( 12 )
anchor_right = 1.0
anchor_bottom = 1.0
__meta__ = {
"_edit_use_anchors_": false
}
[connection signal="visibility_changed" from="." to="." method="_on_Histogram_visibility_changed"]