Class: ArTTY::Generator

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

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Generator 



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# 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:



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# 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