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‎processing_app/library/file_chooser/README.md‎

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### Obtaining and Using contextfreeart ###
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For debian users it should be as simple as `sudo apt-get install cfdg` installs commandline version.
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For others check [contextfreeart website][download], if you get the command line version you could easily automate running the cfdg program, once the files have been created.
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### Black and White Demo
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```ruby
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#!/usr/bin/env jruby -v -W2
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# frozen_string_literal: true
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require 'propane'
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# Creates files that you can use with context free art (Gray Scale)
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class GrayScale < Propane::App
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load_library :file_chooser
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attr_reader :img, :data, :skip, :invert
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def settings
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size 500, 500
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end
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def setup
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sketch_title 'Pixellator for CheChe'
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color_mode(HSB, 360, 1.0, 1.0)
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fill 0, 0, 200
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text('Click Window to Load Image', 10, 100)
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@skip = 5 # controls apparent resolution
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@data = []
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@invert = true
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end
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def draw
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unless img.nil?
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img.filter(INVERT) if invert
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@invert = false
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image(img, 0, 0)
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end
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end
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def write_data(name, data)
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df = " %s [x %d y %d s %0.2f hue 0 sat 0.7 brightness 0]\n"
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open(data_path('data.cfdg'), 'w') do |pw|
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pw.puts format("shape %s{\n", name)
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data.each do |row|
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pw.puts format(df, *row)
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end
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pw.puts "}\n"
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end
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end
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def write_start(start, data)
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open(data_path(format('%s.cfdg', start)), 'w') do |pw|
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pw.puts 'CF::Background = [b 1]'
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pw.puts format("startshape %s\n", start)
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pw.puts "shape dot{CIRCLE[]}\n"
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pw.puts "import data.cfdg\n"
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end
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write_data start, data
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end
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def file_selected(selection)
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if selection.nil?
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puts 'Nothing Chosen'
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else
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@img = load_image(selection.get_absolute_path)
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surface.set_size(img.width, img.height)
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end
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end
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def mouse_clicked
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@img = nil
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# java_signature 'void selectInput(String, String)'
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select_input('Select Image File', 'file_selected')
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end
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def key_pressed
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case key
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when 'p', 'P'
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export = Thread.new do
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pixellate
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end
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export.join
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puts 'done'
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when 's', 'S'
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save_frame(data_path('original.png'))
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else
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puts format('key %s was pressed', key)
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end
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end
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def pixellate
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load_pixels
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shp = 'dot'
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(skip...img.width).step(skip) do |x|
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(skip...img.height).step(skip) do |y|
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pix = pixels[x + y * width]
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sz = brightness(pix) * skip
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data << [
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shp, -width / 2 + x, height / 2 - y, sz.round(2)
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] if sz > 0.4
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end
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end
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write_start 'cheche', data
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end
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end
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GrayScale.new
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```
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If for example the chosen sketch was 590 * 600 pixels you might use the following to generate the pixellated image using the `cli` assuming `haddock.cfdg` is in the local folder. Windows users might need to use different escapes for path, but then they've got a GUI to use if they want.
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```bash
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cfdg haddock.cfdg -w 1180 -h 1200 -o phil.png
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```
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But there is much more you can do (look up che che for a much more sophisticated cfdg file).
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NB: You could add a grayscale filter if you start with a coloured image. Here we set hue to 0 ie red colour 20 is yellow etc, read more from contextfreeart tutorial (plus have a go at creating a standalone cfdg sketch it is a lot of fun).
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[download]:http://www.contextfreeart.org/mediawiki/index.php/Download_page

‎processing_app/library/file_chooser/gray.rb‎

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#!/usr/bin/env jruby -v -W2
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# frozen_string_literal: true
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require 'propane'
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# Creates files that you can use with context free art (Gray Scale)
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class GrayScale < Propane::App
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load_library :file_chooser
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attr_reader :img, :data, :skip, :invert
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def settings
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size 500, 500
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end
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def setup
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sketch_title 'Pixellator for CheChe'
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color_mode(HSB, 360, 1.0, 1.0)
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fill 0, 0, 200
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text('Click Window to Load Image', 10, 100)
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@skip = 5 # controls apparent resolution
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@data = []
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@invert = true
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end
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def draw
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unless img.nil?
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img.filter(INVERT) if invert
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@invert = false
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image(img, 0, 0)
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end
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end
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def write_data(name, data)
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df = " %s [x %d y %d s %0.2f hue 0 sat 0.7 brightness 0]\n"
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open(data_path('data.cfdg'), 'w') do |pw|
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pw.puts format("shape %s{\n", name)
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data.each do |row|
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pw.puts format(df, *row)
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end
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pw.puts "}\n"
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end
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end
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def write_start(start, data)
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open(data_path(format('%s.cfdg', start)), 'w') do |pw|
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pw.puts 'CF::Background = [b 1]'
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pw.puts format("startshape %s\n", start)
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pw.puts "shape dot{CIRCLE[]}\n"
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pw.puts "import data.cfdg\n"
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end
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write_data start, data
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end
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def file_selected(selection)
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if selection.nil?
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puts 'Nothing Chosen'
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else
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@img = load_image(selection.get_absolute_path)
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surface.set_size(img.width, img.height)
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end
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end
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def mouse_clicked
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@img = nil
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# java_signature 'void selectInput(String, String)'
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select_input('Select Image File', 'file_selected')
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end
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def key_pressed
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case key
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when 'p', 'P'
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export = Thread.new do
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pixellate
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end
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export.join
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puts 'done'
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when 's', 'S'
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save_frame(data_path('original.png'))
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else
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puts format('key %s was pressed', key)
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end
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end
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def pixellate
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load_pixels
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shp = 'dot'
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(skip...img.width).step(skip) do |x|
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(skip...img.height).step(skip) do |y|
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pix = pixels[x + y * width]
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sz = brightness(pix) * skip
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data << [
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shp, -width / 2 + x, height / 2 - y, sz.round(2)
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] if sz > 0.4
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end
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end
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write_start 'cheche', data
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end
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end
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GrayScale.new

‎processing_app/library/file_chooser/pixellator.rb‎

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#!/usr/bin/env jruby -v -W2
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# frozen_string_literal: true
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require 'propane'
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# Creates files that you can use with context free art
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class Pixellator < Propane::App
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load_library :file_chooser
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attr_reader :img, :data, :skip, :poster
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###########
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# Sophisticated example of file chooser.
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###########
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KEYS = %w(0 4 5 6 7 8 9)
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def settings
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size 500, 500
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end
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def setup
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sketch_title 'Pixellator'
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color_mode(HSB, 360, 1.0, 1.0)
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fill 0, 0, 200
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text('Click Window to Load Image', 10, 100)
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@skip = 20 # controls apparent resolution
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@data = []
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@poster = 0
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end
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def draw
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image(img, 0, 0) unless img.nil?
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filter(POSTERIZE, poster) unless poster == 0
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end
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def write_data(name, data)
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df = " %s [x %d y %d s %0.2f hue %d sat %0.3f brightness 1.0]\n"
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open(data_path('data.cfdg'), 'w') do |pw|
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pw.puts format("shape %s{\n", name)
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data.each do |row|
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pw.puts format(df, *row)
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end
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pw.puts "}\n"
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end
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end
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def write_start(start, data)
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open(data_path(format('%s.cfdg', start)), 'w') do |pw|
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pw.puts 'CF::Background = [b -1]'
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pw.puts format("startshape %s\n", start)
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pw.puts "shape dot{CIRCLE[]}\n"
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pw.puts "import data.cfdg\n"
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end
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write_data start, data
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end
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def file_selected(selection)
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if selection.nil?
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puts 'Nothing Chosen'
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else
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@img = load_image(selection.get_absolute_path)
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surface.set_size(img.width, img.height)
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end
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end
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def mouse_clicked
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@img = nil
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# java_signature 'void selectInput(String, String)'
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select_input('Select Image File', 'file_selected')
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end
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def key_pressed
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case key
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when 'p', 'P'
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export = Thread.new do
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pixellate
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end
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export.join
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puts 'done'
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when 's', 'S'
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save_frame(data_path('original.png'))
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when *KEYS
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@poster = key.to_i
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else
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puts format('key %s was pressed', key)
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end
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end
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def pixellate
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load_pixels
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shp = 'dot'
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(skip...img.width).step(skip) do |x|
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(skip...img.height).step(skip) do |y|
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pix = pixels[x + y * width]
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sat = saturation(pix)
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hue = hue(pix)
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sz = brightness(pix) * skip
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data << [
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shp, -width / 2 + x, height / 2 - y, sz.round(2), hue, sat
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] if sz > 0.4
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end
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end
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write_start 'haddock', data
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end
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end
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Pixellator.new

‎processing_app/library/file_chooser/select_file.rb‎

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#!/usr/bin/env jruby -v -W2
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# frozen_string_literal: true
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require 'propane'
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###########
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# Example Native File Chooser using vanilla processing
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# select_input, and file_selected
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###########
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class SelectFile < Propane::App
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load_library :file_chooser
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def setup
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sketch_title 'SelectFile'
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# java_signature 'void selectInput(String, String)'
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select_input('Select a File', 'file_selected')
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end
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def settings
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size 200, 100
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end
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# signature 'void file_selected(java.io.File file)'
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def file_selected(file)
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puts file.get_absolute_path unless file.nil?
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end
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end
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SelectFile.new

processing_app/topics/shaders/data/Univers45.vlw renamed to regular/data/Univers45.vlw

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processing_app/topics/shaders/kinetic_type.rb renamed to regular/kinetic_type.rb

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