Class: ArTTY::Generator

Inherits:
Object
  • Object
show all
Defined in:
lib/arTTY/generator.rb

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Generator

Returns a new instance of Generator.



128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
 
# File 'lib/arTTY/generator.rb', line 128

def initialize
    if (ScoobyDoo.where_are_you("convert").nil?)
        raise ArTTY::Error::ImageMagickNotFound.new
    end

    @keys = Array.new
    key = "!"
    while key != "~" do
        @keys.push(key.clone)
        case key
        when "!"
            key = "#"
        when "9"
            key = ":"
        when "Z"
            key = "["
        when "["
            key = "]"
        when "_"
            key = "a"
        when "z"
            key = "{"
        else
            key.next!
        end
    end
    @keys.push("~")
end

Instance Method Details

#generate(image, name = nil) ⇒ Object

Raises:



4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
 
# File 'lib/arTTY/generator.rb', line 4

def generate(image, name = nil)
    file = Pathname.new(image).expand_path
    pixels = nil

    if (!file.exist?)
        raise ArTTY::Error::ImageNotFound.new(file.to_s)
    end

    file.to_s.match(%r{([^/]+?)(_(\d+)x(\d+))?\.}) do |m|
        name = m[1] if (name.nil? || name.empty?)
        width = m[3].nil? ? nil : m[3].to_i
        height = m[4].nil? ? nil : m[4].to_i
        pixels = get_pixel_info(file, width, height)
    end

    raise ArTTY::Error::NoPixelDataFound.new if (pixels.empty?)

    legend = generate_color_map(pixels)
    return generate_json(name, pixels, legend)
end