[cairo-commit] rcairo/packages/cairo/lib/cairo/context circle.rb, NONE, 1.1 quad.rb, NONE, 1.1 rectangle.rb, NONE, 1.1

[Kouhei Sutou]

Committed by: kou

Update of /cvs/cairo/rcairo/packages/cairo/lib/cairo/context
In directory kemper:/tmp/cvs-serv19235/packages/cairo/lib/cairo/context

Added Files:
	circle.rb quad.rb rectangle.rb 
Log Message:
* packages/cairo/lib/cairo.rb, packages/cairo/lib/cairo/context/,
  packages/cairo/lib/cairo/context.rb: split Cairo::Context
  extensions with each file under packages/cairo/lib/cairo/context/
  directory.


--- NEW FILE: circle.rb ---
module Cairo
  class Context
    module Circle
      def circle(x, y, radius)
        arc(x, y, radius, 0, 2 * Math::PI)
      end
    end
  end
end

--- NEW FILE: quad.rb ---
module Cairo
  class Context
    module Quad
      def quad_to(x1, y1, x2, y2)
        x0, y0 = current_point
        cx1 = x0 + 2 * (x1 - x0) / 3.0
        cy1 = y0 + 2 * (y1 - y0) / 3.0
        cx2 = cx1 + (x2 - x0) / 3.0
        cy2 = cy1 + (y2 - y0) / 3.0
        curve_to(cx1, cy1, cx2, cy2, x2, y2)
      end

      def rel_quad_to(x1, y1, x2, y2)
        x0, y0 = current_point
        quad_to(x1 + x0, y1 + y0, x2 + x0, y2 + x0)
      end
    end
  end
end

--- NEW FILE: rectangle.rb ---
module Cairo
  class Context
    module Rectangle
      def rounded_rectangle(x, y, width, height, x_radius, y_radius=nil)
        x1 = x
        x2 = x1 + width
        y1 = y
        y2 = y1 + height

        y_radius ||= x_radius

        x_radius = [x_radius, width / 2.0].min
        y_radius = [y_radius, height / 2.0].min

        xr1 = x_radius
        xr2 = x_radius / 2.0
        yr1 = y_radius
        yr2 = y_radius / 2.0

        move_to(x1 + xr1, y1)
        line_to(x2 - xr1, y1)
        curve_to(x2 - xr2, y1, x2, y1 + yr2, x2, y1 + yr1)
        line_to(x2, y2 - yr1)
        curve_to(x2, y2 - yr2, x2 - xr2, y2, x2 - xr1, y2)
        line_to(x1 + xr1, y2)
        curve_to(x1 + xr2, y2, x1, y2 - yr2, x1, y2 - yr1)
        line_to(x1, y1 + yr1)
        curve_to(x1, y1 + yr2, x1 + xr2, y1, x1 + xr1, y1)
        close_path
      end
    end
  end
end