module Prawn::Graphics::Color

# File lib/prawn/graphics/color.rb, line 35
def fill_color(*color)
  return current_fill_color if color.empty?

  self.current_fill_color = process_color(*color)
  set_fill_color
end

Sets or returns the fill color.

@overload fill_color

Returns the current fill color.

@return [String, Array<Number>]

@overload fill_color(color)

Sets the fill color.

If a single argument is provided, it should be a 6 digit HTML color
code.

```ruby
pdf.fill_color "f0ffc1"
```

If 4 arguments are provided, the color is assumed to be a CMYK value.
Values range is 0–100.

```ruby
pdf.fill_color 0, 99, 95, 0
```

@param color [String, Array<Number>]
@return [void]

# File lib/prawn/graphics/color.rb, line 101
def hex2rgb(hex)
  r = hex[0..1]
  g = hex[2..3]
  b = hex[4..5]
  [r, g, b].map { |e| e.to_i(16) }
end

Converts hex string into RGB value array.

@example

Prawn::Graphics::Color.hex2rgb("ff7808")
#=> [255, 120, 8]

@param hex [String] must be 6-digits long. @return [Array(Integer, Integer, Integer)]

# File lib/prawn/graphics/color.rb, line 89
def rgb2hex(rgb)
  rgb.map { |e| format('%<value>02x', value: e) }.join
end

Converts RGB value array to hex string suitable for use with {fill_color} and {stroke_color}.

@example

Prawn::Graphics::Color.rgb2hex([255, 120, 8])
#=> "ff7808"

@param rgb [Array(Number, Number, Number)]

Each component has to be in the range from 0 to 255.

@return [String]

# File lib/prawn/graphics/color.rb, line 67
def stroke_color(*color)
  return current_stroke_color if color.empty?

  color = process_color(*color)
  self.current_stroke_color = color
  set_stroke_color(color)
end

Sets or returns the line stroking color.

@overload stroke_color

When called with no argument, it returns the current stroking color.

@return [String, Array<Number>]

@overload stroke_color(color)

Sets the stroking color.

@param color [String, Array<Number>] new stroking color:
  - In String form it should be a 6 digit HTML color code.

    ```ruby
    pdf.stroke_color "f0ffc1"
    ```
  - If 4 arguments are provided, the color is assumed to be a CMYK
    value. Values range from 0 to 100.

    ```ruby
    pdf.stroke_color 0, 99, 95, 0
    ```
@return [void]