Class: PDF::Core::GraphicState

Inherits:
Object
  • Object
show all
Defined in:
lib/pdf/core/graphics_state.rb

Overview

Graphics state. It’s a partial represenation of PDF graphics state. Only the parts implemented in Prawn are present here.

NOTE: This class may be a good candidate for a copy-on-write hash.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(previous_state = nil) ⇒ GraphicState

Returns a new instance of GraphicState.

Parameters:

Source Code
lib/pdf/core/graphics_state.rb, line 92
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def initialize(previous_state = nil)

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  if previous_state

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    initialize_copy(previous_state)

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  else

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    @color_space = {}

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    @fill_color = '000000'

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    @stroke_color = '000000'

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    @dash = { dash: nil, space: nil, phase: 0 }

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    @cap_style = :butt

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    @join_style = :miter

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    @line_width = 1

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  end

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end

Instance Attribute Details

#cap_style ⇒ Symbol

Line cap

Returns:

  • (Symbol)
Source Code
lib/pdf/core/graphics_state.rb, line 74
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def cap_style

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  @cap_style

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end

#color_space ⇒ Hash

Color space

Returns:

  • (Hash)
Source Code
lib/pdf/core/graphics_state.rb, line 66
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def color_space

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  @color_space

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end

#dash ⇒ Hash<[:dash, :space, :phase], [nil, Numeric]>

Dash

Returns:

  • (Hash<[:dash, :space, :phase], [nil, Numeric]>)
Source Code
lib/pdf/core/graphics_state.rb, line 70
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def dash

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  @dash

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end

#fill_color ⇒ String

Fill color

Returns:

  • (String)
Source Code
lib/pdf/core/graphics_state.rb, line 86
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def fill_color

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  @fill_color

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end

#join_style ⇒ Symbol

Line Join

Returns:

  • (Symbol)
Source Code
lib/pdf/core/graphics_state.rb, line 78
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def join_style

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  @join_style

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end

#line_width ⇒ Numberic

Line width

Returns:

  • (Numberic)
Source Code
lib/pdf/core/graphics_state.rb, line 82
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def line_width

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  @line_width

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end

#stroke_color ⇒ Object

Stroke color

Source Code
lib/pdf/core/graphics_state.rb, line 89
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def stroke_color

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  @stroke_color

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end

Instance Method Details

#dash_setting ⇒ String

PDF representation of dash settings

Returns:

  • (String)
Source Code
lib/pdf/core/graphics_state.rb, line 109
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def dash_setting

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  return '[] 0 d' unless @dash[:dash]

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  array =

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    if @dash[:dash].is_a?(Array)

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      @dash[:dash]

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    else

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      [@dash[:dash], @dash[:space]]

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    end

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  "[#{PDF::Core.real_params(array)}] #{PDF::Core.real(@dash[:phase])} d"

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end