Module: Prawn::Document::GraphicsState

Included in:
Prawn::Document
Defined in:
lib/prawn/document/graphics_state.rb

Instance Method Summary collapse

Instance Method Details

#restore_graphics_state ⇒ Object

Pops the last saved graphics state off the graphics state stack and restores the state to those values



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# File 'lib/prawn/document/graphics_state.rb', line 43

def restore_graphics_state
  add_content "Q"
end

#save_graphics_state ⇒ Object

Pushes the current graphics state on to the graphics state stack so we can restore it when finished with a change we want to isolate (such as modifying the transformation matrix). Used in pairs with restore_graphics_state or passed a block

Example without a block:

save_graphics_state
rotate 30
text "rotated text"
restore_graphics_state

Example with a block:

save_graphics_state do
  rotate 30
  text "rotated text"
end



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# File 'lib/prawn/document/graphics_state.rb', line 33

def save_graphics_state
  add_content "q"
  if block_given?
    yield
    restore_graphics_state
  end
end