Module Prawn::Graphics::Transparency
In: lib/prawn/graphics/transparency.rb

The Prawn::Transparency module is used to place transparent content on the page. It has the capacity for separate transparency values for stroked content and all other content.

Example: 

  # both the fill and stroke will be at 50% opacity
  pdf.transparent(0.5) do
    pdf.text("hello world")
    pdf.fill_and_stroke_circle_at([x, y], :radius => 25)
  end

  # the fill will be at 50% opacity, but the stroke will
  # be at 75% opacity
  pdf.transparent(0.5, 0.75) do
    pdf.text("hello world")
    pdf.fill_and_stroke_circle_at([x, y], :radius => 25)
  end

Methods

transparent  

Public Instance methods

transparent(opacity, stroke_opacity=opacity) {|if block_given?| ...}

Sets the opacity and stroke_opacity for all the content within the block If stroke_opacity is not provided, then it takes on the same value as opacity

Valid ranges for both paramters are 0.0 to 1.0

Example: 

  # both the fill and stroke will be at 50% opacity
  pdf.transparent(0.5) do
    pdf.text("hello world")
    pdf.fill_and_stroke_circle_at([x, y], :radius => 25)
  end

  # the fill will be at 50% opacity, but the stroke will
  # be at 75% opacity
  pdf.transparent(0.5, 0.75) do
    pdf.text("hello world")
    pdf.fill_and_stroke_circle_at([x, y], :radius => 25)
  end

[Validate]