Module: Emojimage

Extended by:
Emojimage
Included in:
Emojimage
Defined in:
lib/emojimage/cli.rb,
lib/emojimage/version.rb,
lib/emojimage/converted.rb,
lib/emojimage/emojimage.rb

Defined Under Namespace

Classes: CLI, Converted

Constant Summary collapse

VERSION = 
"0.1.0"
@@emoji = 
Emoji.all.select { |char| !char.custom? }
@@where = 
File.expand_path "../", File.dirname(__FILE__)
@@info = 
false

Instance Method Summary collapse

Instance Method Details

#analyze(img) ⇒ Object

Get the overall average color of an image.



54
55
56
 
# File 'lib/emojimage/emojimage.rb', line 54

def analyze img
  average img.pixels
end

#average(colors, transparentBlock = false, blend = ChunkyPNG::Color::WHITE) ⇒ Object

Average of an array of colors. Returns ChunkyPNG::Color::TRANSPARENT if transparentBlock is true and the colors are all transparent. Blends the transparent/semi-transparent with blend color.



35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
 
# File 'lib/emojimage/emojimage.rb', line 35

def average colors, transparentBlock = false, blend = ChunkyPNG::Color::WHITE
  color = [0.0,0.0,0.0,0.0]
  count = 0.0
  for pxl in colors
    weight = ((255 - (ChunkyPNG::Color.a pxl)) / 255.0).to_f
    color[0] += ((1.0 - weight) * (ChunkyPNG::Color.r pxl).to_f + weight * (ChunkyPNG::Color.r blend).to_f)
    color[1] += ((1.0 - weight) * (ChunkyPNG::Color.g pxl).to_f + weight * (ChunkyPNG::Color.g blend).to_f)
    color[2] += ((1.0 - weight) * (ChunkyPNG::Color.b pxl).to_f + weight * (ChunkyPNG::Color.b blend).to_f)
    color[3] += ChunkyPNG::Color.a pxl
    count += 1.0
  end
  if transparentBlock and color[3] == 0.0
    ChunkyPNG::Color::TRANSPARENT
  else
    ChunkyPNG::Color.rgb (color[0]/count).round, (color[1]/count).round, (color[2]/count).round
  end
end

#chunkemoji(e) ⇒ Object

Get ChunkyPNG::Image from emoji



126
127
128
 
# File 'lib/emojimage/emojimage.rb', line 126

def chunkemoji e
  ChunkyPNG::Image.from_file(where e)
end

#codify(blend = ChunkyPNG::Color::WHITE) ⇒ Object

Create JSON file with info about emoji.



95
96
97
98
99
100
101
102
103
104
105
106
107
 
# File 'lib/emojimage/emojimage.rb', line 95

def codify blend = ChunkyPNG::Color::WHITE
  res = {"characters" => []}
  for e in @@emoji
    png = chunkemoji e
    res["characters"] << {
      "filename" => e.image_filename,
      "value" => average(png.pixels, false, blend),
      "unicode" => e.unicode_aliases.first,
      "key" => unpackhex(e)
    }
  end
  File.open(within("../public/data/emoji.json"), "w+") { |f| f.write res.to_json }
end

#compare(c1, c2) ⇒ Object

Get distance between two colors.



110
111
112
 
# File 'lib/emojimage/emojimage.rb', line 110

def compare c1, c2
  Math.sqrt((ChunkyPNG::Color.r(c1)-ChunkyPNG::Color.r(c2))**2+(ChunkyPNG::Color.g(c1)-ChunkyPNG::Color.g(c2))**2+(ChunkyPNG::Color.b(c1)-ChunkyPNG::Color.b(c2))**2)
end

#emoji ⇒ Object

All the emoji



13
14
15
 
# File 'lib/emojimage/emojimage.rb', line 13

def emoji
  @@emoji
end

#emojinfo ⇒ Object

Grab emoji info. If it doesn’t exist, return false.



78
79
80
81
82
83
84
85
86
87
 
# File 'lib/emojimage/emojimage.rb', line 78

def emojinfo
  if @@info == false
    if File.exist?(within("../public/data/emoji.json"))
      @@info = JSON.parse(File.open(within("../public/data/emoji.json"), 'rb') { |f| f.read })
    else
      @@info = false
    end
  end
  @@info
end

#find(color, blend) ⇒ Object

Get emoji that corresponds to color. blend represents a color to blend with for transparency (in other words, a background color).



115
116
117
118
119
120
121
122
123
 
# File 'lib/emojimage/emojimage.rb', line 115

def find color, blend
  setup blend
  data = emojinfo
  if color == ChunkyPNG::Color::TRANSPARENT
    false
  else
    data["characters"].min_by { |char| compare color, char["value"] }
  end
end

#setup(blend) ⇒ Object

Sets up the enviroments by grabbing the emoji images and setting emoji info.



66
67
68
69
70
71
72
73
74
75
 
# File 'lib/emojimage/emojimage.rb', line 66

def setup blend
  gemojiV = "#{Gem.loaded_specs['gemoji'].version.to_s}\n#{blend}"
  unless setup? blend
    system("cd #{within "../"} && rake emoji")
    # puts "Initialized emoji images"
    codify blend
    File.open(within("../public/data/.last"), "w+") { |f| f.write gemojiV }
    # puts "Analyzed emoji images"
  end
end

#setup?(blend) ⇒ Boolean

Has this been set up with the current blend setting?

Returns:

  • (Boolean) 


59
60
61
62
63
 
# File 'lib/emojimage/emojimage.rb', line 59

def setup? blend
  gemojiV = "#{Gem.loaded_specs['gemoji'].version.to_s}\n#{blend}"
  lastImport = File.open(within("../public/data/.last"), 'rb') { |f| f.read }
  lastImport == gemojiV
end

#unpackhex(c) ⇒ Object

Splits a hex value in case there are two hexes inside



90
91
92
 
# File 'lib/emojimage/emojimage.rb', line 90

def unpackhex c
  c.hex_inspect.split '-'
end

#where(e) ⇒ Object

Grab emoji image



18
19
20
21
22
23
24
25
26
27
 
# File 'lib/emojimage/emojimage.rb', line 18

def where e
  if e.class == Hash
    address = e['filename']
  elsif e.class == Emoji::Character
    address = e.image_filename
  else
    raise "Unknown emoji representation passed to Emojimage.where"
  end
  within "../public/images/emoji/#{address}"
end

#within(path) ⇒ Object

Find relative path.



30
31
32
 
# File 'lib/emojimage/emojimage.rb', line 30

def within path
  File.expand_path path, @@where
end