From 95b0c4fa96759dc773a3e2fb4ef3a8dd38dcfe4a Mon Sep 17 00:00:00 2001
From: Adrian Hill <adrian.hill@mailbox.org>
Date: Sun, 13 Jun 2021 19:01:02 +0200
Subject: [PATCH] Add a Pluto demo

towards #17
---
 docs/pluto/demo.jl | 153 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 153 insertions(+)
 create mode 100644 docs/pluto/demo.jl

diff --git a/docs/pluto/demo.jl b/docs/pluto/demo.jl
new file mode 100644
index 0000000..6422000
--- /dev/null
+++ b/docs/pluto/demo.jl
@@ -0,0 +1,153 @@
+### A Pluto.jl notebook ###
+# v0.14.8
+
+using Markdown
+using InteractiveUtils
+
+# This Pluto notebook uses @bind for interactivity. When running this notebook outside of Pluto, the following 'mock version' of @bind gives bound variables a default value (instead of an error).
+macro bind(def, element)
+    quote
+        local el = $(esc(element))
+        global $(esc(def)) = Core.applicable(Base.get, el) ? Base.get(el) : missing
+        el
+    end
+end
+
+# ╔═╡ af518646-d4e6-4779-bea7-d1297dfee472
+begin
+    using Pkg: Pkg
+    Pkg.activate(mktempdir())
+    Pkg.add("PlutoUI")
+    Pkg.add("Images")
+    Pkg.add("ImageMagick")
+    Pkg.add("DitherPunk")
+end
+
+# ╔═╡ 1bbc59ff-a98b-4e1f-a9bc-b9eed2dea33c
+begin
+    using PlutoUI
+    using Images
+    using ImageMagick: load_
+
+    using DitherPunk
+end
+
+# ╔═╡ 6891dfb6-3fe5-4717-8237-a57bbf87d0cd
+md"# DitherPunk Demo"
+
+# ╔═╡ 51470fb2-ae78-11eb-3529-9599e47ad4c7
+md"""
+## Load an image
+Welcome to the demo for our Julia package [DitherPunk.jl](https://github.com/adrhill/DitherPunk.jl)!
+
+Select a `png` or `jpg` file from your computer. It will automatically be converted to grayscale:
+"""
+
+# ╔═╡ 87476845-3892-411c-a958-d3fb786cd3ea
+@bind file FilePicker()
+
+# ╔═╡ cc480e47-d039-4741-967e-13b8c4c9c107
+if isnothing(file) || isempty(file["data"])
+    md"""or paste your image URL here:"""
+else
+    md"""Selected image $(file[\"name\"])."""
+end
+
+# ╔═╡ 6369b9fa-726a-4b20-acdb-22bf4824eb51
+if isnothing(file) || isempty(file["data"])
+    @bind url TextField(; default="https://testimages.juliaimages.org/images/cameraman.tif")
+end
+
+# ╔═╡ 7699f719-ab38-4e60-b7d4-a0652a5f5015
+md"""## Select an algorithm"""
+
+# ╔═╡ a9d5c1bc-89b0-4f03-8108-cd16a201c876
+@bind alg_name Select([
+    "Bayer level 1",
+    "Bayer level 2",
+    "Bayer level 3",
+    "Bayer level 4",
+    "Atkinson",
+    "FloydSteinberg",
+    "JarvisJudice",
+    "Stucki",
+    "Burkes",
+    "Sierra",
+    "TwoRowSierra",
+    "SierraLite",
+    "SimpleErrorDiffusion",
+    "ClusteredDots",
+    "CentralWhitePoint",
+    "BalancedCenteredPoint",
+    "Rhombus",
+    "ConstantThreshold",
+    "WhiteNoiseThreshold",
+])
+
+# ╔═╡ 13f284f5-119a-41fd-b6a7-4cea4f1d1555
+md"Image size: $(@bind width Slider(1:1000, default=256, show_value=true))"
+
+# ╔═╡ ee6e60b8-5a27-4d48-94e5-88cbd8a9522c
+md"Dither in linear colorspace: $(@bind to_linear CheckBox())"
+
+# ╔═╡ 59a30afb-6434-4fbc-85b6-241e8efb4171
+md"""You can **right click** on your dithered image to save it.
+
+
+Feel free to [star our repo on GitHub](https://github.com/JuliaImages/DitherPunk.jl) and check out the [docs](https://juliaimages.org/DitherPunk.jl/stable/generated/color/) for color algorithms!
+"""
+
+# ╔═╡ cc3d95f9-ccda-465e-8dac-deaf622b7876
+begin
+    if isnothing(file) || isempty(file["data"])
+        img = load(download(url))
+    else
+        img = load_(file["data"])
+    end
+    ratio = width / maximum(size(img))
+    img = imresize(img; ratio=ratio)
+    img = Gray.(img)
+end;
+
+# ╔═╡ 5c6d5500-6801-42a0-a338-ca57b8b15733
+alg = Dict(
+    "Atkinson" => Atkinson(),
+    "FloydSteinberg" => FloydSteinberg(),
+    "JarvisJudice" => JarvisJudice(),
+    "Stucki" => Stucki(),
+    "Burkes" => Burkes(),
+    "Sierra" => Sierra(),
+    "TwoRowSierra" => TwoRowSierra(),
+    "SierraLite" => SierraLite(),
+    "SimpleErrorDiffusion" => SimpleErrorDiffusion(),
+    "Bayer level 1" => Bayer(),
+    "Bayer level 2" => Bayer(; level=2),
+    "Bayer level 3" => Bayer(; level=3),
+    "Bayer level 4" => Bayer(; level=4),
+    "ClusteredDots" => ClusteredDots(),
+    "CentralWhitePoint" => CentralWhitePoint(),
+    "BalancedCenteredPoint" => BalancedCenteredPoint(),
+    "Rhombus" => Rhombus(),
+    "ConstantThreshold" => ConstantThreshold(),
+    "WhiteNoiseThreshold" => WhiteNoiseThreshold(),
+)[alg_name];
+
+# ╔═╡ c62fa3a9-334e-4cc7-ae49-d6ab362c4a52
+dither(img, alg; to_linear)
+
+# ╔═╡ Cell order:
+# ╟─6891dfb6-3fe5-4717-8237-a57bbf87d0cd
+# ╠═1bbc59ff-a98b-4e1f-a9bc-b9eed2dea33c
+# ╟─51470fb2-ae78-11eb-3529-9599e47ad4c7
+# ╟─87476845-3892-411c-a958-d3fb786cd3ea
+# ╟─cc480e47-d039-4741-967e-13b8c4c9c107
+# ╟─6369b9fa-726a-4b20-acdb-22bf4824eb51
+# ╟─7699f719-ab38-4e60-b7d4-a0652a5f5015
+# ╟─a9d5c1bc-89b0-4f03-8108-cd16a201c876
+# ╟─13f284f5-119a-41fd-b6a7-4cea4f1d1555
+# ╟─ee6e60b8-5a27-4d48-94e5-88cbd8a9522c
+# ╠═c62fa3a9-334e-4cc7-ae49-d6ab362c4a52
+# ╟─59a30afb-6434-4fbc-85b6-241e8efb4171
+# ╟─af518646-d4e6-4779-bea7-d1297dfee472
+# ╟─cc3d95f9-ccda-465e-8dac-deaf622b7876
+# ╟─5c6d5500-6801-42a0-a338-ca57b8b15733