Module: Prawn::Graphics::Color

Included in:
Prawn::Graphics
Defined in:
lib/prawn/graphics/color.rb

Constant Summary

Stable API (collapse)

Class Method Details

+ (Object) hex2rgb(hex)

Converts hex string into RGB value array:

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


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# File 'lib/prawn/graphics/color.rb', line 76

def hex2rgb(hex)
  r,g,b = hex[0..1], hex[2..3], hex[4..5]
  [r,g,b].map { |e| e.to_i(16) }
end

+ (Object) rgb2hex(rgb)

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

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


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# File 'lib/prawn/graphics/color.rb', line 67

def rgb2hex(rgb)
  rgb.map { |e| "%02x" % e }.join
end

Instance Method Details

- (Object) fill_color(*color) Also known as: fill_color=

Sets or returns the fill color.

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

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

pdf.fill_color "f0ffc1"

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

pdf.fill_color 0, 99, 95, 0


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# File 'lib/prawn/graphics/color.rb', line 28

def fill_color(*color)
  return current_fill_color if color.empty?
  self.current_fill_color = process_color(*color)
  set_fill_color
end

- (Object) stroke_color(*color) Also known as: stroke_color=

Sets or returns the line stroking color.

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

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

pdf.stroke_color "f0ffc1"

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

pdf.stroke_color 0, 99, 95, 0


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# File 'lib/prawn/graphics/color.rb', line 50

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