Module: Rabbit::Renderer::Kernel

Included in:
Engine::Cairo
Defined in:
lib/rabbit/renderer/kernel.rb

Instance Method Summary collapse

Instance Method Details

#draw_background(slide) ⇒ Object 


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# File 'lib/rabbit/renderer/kernel.rb', line 71

def draw_background(slide)
  draw_rectangle(true, 0, 0, width, height, @background)
end

#draw_circle(filled, x, y, w, h, color = nil, params = {}) ⇒ Object 


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# File 'lib/rabbit/renderer/kernel.rb', line 75

def draw_circle(filled, x, y, w, h, color=nil, params={})
  draw_arc(filled, x, y, w, h, 0, 360, color, params)
end

#draw_circle_by_radius(filled, x, y, r, color = nil, params = {}) ⇒ Object 


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# File 'lib/rabbit/renderer/kernel.rb', line 79

def draw_circle_by_radius(filled, x, y, r, color=nil, params={})
  draw_arc_by_radius(filled, x, y, r, 0, 360, color, params)
end

#draw_flag(x, y, pole_height, params) ⇒ Object 


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# File 'lib/rabbit/renderer/kernel.rb', line 83

def draw_flag(x, y, pole_height, params)
  if params["flag_type"] == "triangle"
    draw_triangle_flag(x, y, pole_height, params)
  else
    draw_rectangle_flag(x, y, pole_height, params)
  end
end

#draw_flag_layout(layout, x, y, pole_width, flag_width, text_height, flag_height) ⇒ Object 


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# File 'lib/rabbit/renderer/kernel.rb', line 177

def draw_flag_layout(layout, x, y, pole_width, flag_width,
                     text_height, flag_height)
  base_x = x + pole_width
  layout.width = flag_width * Pango::SCALE
  layout.alignment = Pango::Alignment::CENTER
  base_y = y
  if text_height < flag_height
    base_y += (flag_height - text_height) / 2
  end
  draw_layout(layout, base_x, base_y)
end

#draw_rectangle_flag(x, y, pole_height, params) ⇒ Object 


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# File 'lib/rabbit/renderer/kernel.rb', line 138

def draw_rectangle_flag(x, y, pole_height, params)
  params = setup_flag_params(pole_height, 1.3, params)

  layout = params["layout"]
  text_width = params["text_width"]
  text_height = params["text_height"]
  pole_width = params["pole_width"]
  pole_color = params["pole_color"]
  flag_height = params["flag_height"]
  flag_width = params["flag_width"]
  flag_color = params["flag_color"]
  flag_frame_width = params["flag_frame_width"]
  flag_frame_color = params["flag_frame_color"]

  draw_rectangle(true, x, y, pole_width, pole_height, pole_color)

  base_x = x + pole_width
  draw_rectangle(true,
                 base_x,
                 y,
                 flag_width,
                 flag_height,
                 flag_frame_color)
  draw_rectangle(true,
                 base_x,
                 y + flag_frame_width,
                 flag_width - flag_frame_width,
                 flag_height - 2 * flag_frame_width,
                 flag_color)

  if layout
    args = [
      layout, x, y, pole_width, flag_width - 2 * flag_frame_width,
      text_height, flag_height,
    ]
    draw_flag_layout(*args)
  end
end

#draw_slide(slide, simulation) ⇒ Object 


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# File 'lib/rabbit/renderer/kernel.rb', line 61

def draw_slide(slide, simulation)
  unless simulation
    save_context
    draw_background(slide)
  end
  yield
ensure
  restore_context unless simulation
end

#draw_triangle_flag(x, y, pole_height, params) ⇒ Object 


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# File 'lib/rabbit/renderer/kernel.rb', line 91

def draw_triangle_flag(x, y, pole_height, params)
  params = setup_flag_params(pole_height, 1.5, params)

  layout = params["layout"]
  text_width = params["text_width"]
  text_height = params["text_height"]
  pole_width = params["pole_width"]
  pole_color = params["pole_color"]
  flag_height = params["flag_height"]
  flag_width = params["flag_width"]
  flag_color = params["flag_color"]
  flag_frame_width = params["flag_frame_width"]
  flag_frame_color = params["flag_frame_color"]

  draw_rectangle(true, x, y, pole_width, pole_height, pole_color)

  base_x = x + pole_width
  draw_polygon(true,
               [
                 [base_x, y],
                 [base_x + flag_width, y + flag_height / 2],
                 [base_x, y + flag_height],
               ],
               flag_frame_color)
  draw_polygon(true,
               [
                 [base_x, y + flag_frame_width],
                 [
                   base_x + flag_width - 2 * flag_frame_width,
                   y + flag_height / 2
                 ],
                 [
                   base_x,
                   y + flag_height - flag_frame_width
                 ],
               ],
               flag_color)

  if layout
    args = [
      layout, x, y, pole_width, flag_width * 0.8,
      text_height, flag_height,
    ]
    draw_flag_layout(*args)
  end
end

#flag_size(pole_height, params) ⇒ Object 


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# File 'lib/rabbit/renderer/kernel.rb', line 189

def flag_size(pole_height, params)
  params = setup_flag_params(pole_height, 1.5, params)
  [params["pole_width"] + params["flag_width"], pole_height]
end

#gl_supported? ⇒ Boolean

Returns:

  • (Boolean) 

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# File 'lib/rabbit/renderer/kernel.rb', line 194

def gl_supported?
  false
end

#make_color(color) ⇒ Object 


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# File 'lib/rabbit/renderer/kernel.rb', line 24

def make_color(color)
  return color if color.is_a?(Color)
  if color.nil?
    @foreground
  else
    Color.parse(color)
  end
end

#reflect_context(base, params = {}) ⇒ Object 


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# File 'lib/rabbit/renderer/kernel.rb', line 42

def reflect_context(base, params={})
end

#restore_context ⇒ Object 


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# File 'lib/rabbit/renderer/kernel.rb', line 58

def restore_context
end

#rotate_context(angle, params = {}) ⇒ Object 


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# File 'lib/rabbit/renderer/kernel.rb', line 36

def rotate_context(angle, params={})
end

#save_context ⇒ Object 


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# File 'lib/rabbit/renderer/kernel.rb', line 48

def save_context
  if block_given?
    begin
      yield
    ensure
      restore_context
    end
  end
end

#scale_context(x, y, params = {}) ⇒ Object 


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# File 'lib/rabbit/renderer/kernel.rb', line 39

def scale_context(x, y, params={})
end

#shear_context(x, y, params = {}) ⇒ Object 


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# File 'lib/rabbit/renderer/kernel.rb', line 45

def shear_context(x, y, params={})
end

#translate_context(x, y, params = {}) ⇒ Object 


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# File 'lib/rabbit/renderer/kernel.rb', line 33

def translate_context(x, y, params={})
end

#z_far ⇒ Object 


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# File 'lib/rabbit/renderer/kernel.rb', line 198

def z_far
  100.0
end

#z_view ⇒ Object 


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# File 'lib/rabbit/renderer/kernel.rb', line 202

def z_view
  5.0
end