Class: GD2::Canvas

Inherits:
Object
  • Object
show all
Defined in:
lib/gd2/canvas.rb

Defined Under Namespace

Classes: FilledPolygon, FilledRectangle, Line, NoColorSelectedError, NoFontSelectedError, OpenPolygon, Point, Polygon, Rectangle, Text, TextCircle

Constant Summary collapse

STYLED =

Special colors

-2
BRUSHED = 
-3
STYLED_BRUSHED = 
-4
TILED = 
-5
TRANSPARENT =

Line styles only; not a color index

-6  # Line styles only; not a color index
ANTI_ALIASED = 
-7

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(image) ⇒ Canvas

Returns a new instance of Canvas.



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# File 'lib/gd2/canvas.rb', line 150

def initialize(image)
  @image = image
  self.thickness = 1
  self.anti_aliasing = false
  move_to(0, 0)
end

Instance Attribute Details

#anti_aliasing ⇒ Object Also known as: anti_aliasing?

Returns the value of attribute anti_aliasing.



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# File 'lib/gd2/canvas.rb', line 138

def anti_aliasing
  @anti_aliasing
end

#brush ⇒ Object

Returns the value of attribute brush.



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# File 'lib/gd2/canvas.rb', line 137

def brush
  @brush
end

#color ⇒ Object

Returns the value of attribute color.



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# File 'lib/gd2/canvas.rb', line 137

def color
  @color
end

#dont_blend ⇒ Object

Returns the value of attribute dont_blend.



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# File 'lib/gd2/canvas.rb', line 137

def dont_blend
  @dont_blend
end

#font ⇒ Object

Returns the value of attribute font.



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# File 'lib/gd2/canvas.rb', line 138

def font
  @font
end

#style ⇒ Object

Returns the value of attribute style.



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# File 'lib/gd2/canvas.rb', line 137

def style
  @style
end

#thickness ⇒ Object

Returns the value of attribute thickness.



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# File 'lib/gd2/canvas.rb', line 137

def thickness
  @thickness
end

#tile ⇒ Object

Returns the value of attribute tile.



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# File 'lib/gd2/canvas.rb', line 137

def tile
  @tile
end

Instance Method Details

#line(x1, y1, x2, y2) ⇒ Object 



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# File 'lib/gd2/canvas.rb', line 211

def line(x1, y1, x2, y2)
  Line.new(point(x1, y1), point(x2, y2)).draw(@image, line_pixel)
end

#line_to(x, y) ⇒ Object 



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# File 'lib/gd2/canvas.rb', line 215

def line_to(x, y)
  point2 = point(x, y)
  line(@point.x, @point.y, point2.x, point2.y)
  @point = point2
  self
end

#location ⇒ Object 



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# File 'lib/gd2/canvas.rb', line 207

def location
  @point.coordinates
end

#move(x, y) ⇒ Object 



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# File 'lib/gd2/canvas.rb', line 202

def move(x, y)
  @point = point(@point.x + x, @point.y + y)
  self
end

#move_to(x, y) ⇒ Object 



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# File 'lib/gd2/canvas.rb', line 197

def move_to(x, y)
  @point = point(x, y)
  self
end

#point(x, y) ⇒ Object 



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# File 'lib/gd2/canvas.rb', line 193

def point(x, y)
  Point.new(x, y)
end

#polygon(points, filled = false, open = false) ⇒ Object 



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# File 'lib/gd2/canvas.rb', line 227

def polygon(points, filled = false, open = false)
  points = points.map { |(x, y)| point(x, y) }
  if filled
    FilledPolygon.new(points).draw(@image, fill_pixel)
  else
    (open ? OpenPolygon : Polygon).new(points).draw(@image, line_pixel)
  end
end

#rectangle(x1, y1, x2, y2, filled = false) ⇒ Object 



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# File 'lib/gd2/canvas.rb', line 222

def rectangle(x1, y1, x2, y2, filled = false)
  (filled ? FilledRectangle : Rectangle).new(point(x1, y1),
    point(x2, y2)).draw(@image, filled ? fill_pixel : line_pixel)
end

#text(string, angle = 0.0) ⇒ Object 



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# File 'lib/gd2/canvas.rb', line 236

def text(string, angle = 0.0)
  Text.new(get_font, @point, angle, string).draw(@image, pixel)
end

#text_circle(top, bottom, radius, text_radius, fill_portion) ⇒ Object 



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# File 'lib/gd2/canvas.rb', line 240

def text_circle(top, bottom, radius, text_radius, fill_portion)
  TextCircle.new(get_font, @point, radius, text_radius, fill_portion,
    top, bottom).draw(@image, pixel)
end