Module: Rabbit::Renderer::Engine::GDK

Includes:
Kernel
Included in:
Pixmap::GDK
Defined in:
lib/rabbit/renderer/engine/gdk.rb

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Kernel

#draw_background, #draw_circle, #draw_circle_by_radius, #draw_cone, #draw_cube, #draw_dodecahedron, #draw_flag, #draw_flag_layout, #draw_icosahedron, #draw_octahedron, #draw_rectangle_flag, #draw_slide, #draw_sphere, #draw_teapot, #draw_tetrahedron, #draw_torus, #draw_triangle_flag, #flag_size, #gl_call_list, #gl_compile, #gl_supported?, #make_color, #new_list_id, #reflect_context, #restore_context, #rotate_context, #save_context, #scale_context, #shear_context, #translate_context, #z_far, #z_view

Class Method Details

.priority ⇒ Object 



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# File 'lib/rabbit/renderer/engine/gdk.rb', line 12

def priority
  0
end

Instance Method Details

#alpha_available? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rabbit/renderer/engine/gdk.rb', line 32

def alpha_available?
  false
end

#background=(color) ⇒ Object 



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# File 'lib/rabbit/renderer/engine/gdk.rb', line 40

def background=(color)
  @background.set_rgb_fg_color(color.to_gdk_color)
end

#background_image=(pixbuf) ⇒ Object 



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# File 'lib/rabbit/renderer/engine/gdk.rb', line 44

def background_image=(pixbuf)
  w, h = pixbuf.width, pixbuf.height
  pixmap = Gdk::Pixmap.new(nil, w, h, depth)
  pixmap.draw_rectangle(@background, true, 0, 0, w, h)
  args = [
          @foreground, pixbuf,
          0, 0, 0, 0, w, h,
          Gdk::RGB::DITHER_NORMAL, 0, 0,
         ]
  pixmap.draw_pixbuf(*args)
  @background.set_tile(pixmap)
  @background.fill = Gdk::GC::Fill::TILED
end

#draw_arc(filled, x, y, w, h, a1, a2, color = nil, params = {}) ⇒ Object 



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# File 'lib/rabbit/renderer/engine/gdk.rb', line 126

def draw_arc(filled, x, y, w, h, a1, a2, color=nil, params={})
  gc = make_gc(color, params)
  return if gc.nil?
  a1 *= 64
  a2 *= 64
  @gdk_drawable.draw_arc(gc, filled, x, y, w, h, a1, a2)
end

#draw_arc_by_radius(filled, x, y, r, a1, a2, color = nil, params = {}) ⇒ Object 



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# File 'lib/rabbit/renderer/engine/gdk.rb', line 134

def draw_arc_by_radius(filled, x, y, r, a1, a2, color=nil, params={})
  sx = x - r
  sy = y - r
  w = r * 2
  h = r * 2
  draw_arc(filled, sx, sy, w, h, a1, a2, color, params)
end

#draw_layout(layout, x, y, color = nil, params = {}) ⇒ Object 



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# File 'lib/rabbit/renderer/engine/gdk.rb', line 148

def draw_layout(layout, x, y, color=nil, params={})
  gc = make_gc(color, params)
  return if gc.nil?
  @gdk_drawable.draw_layout(gc, x, y, layout)
end

#draw_line(x1, y1, x2, y2, color = nil, params = {}) ⇒ Object 



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

def draw_line(x1, y1, x2, y2, color=nil, params={})
  gc = make_gc(color, params)
  return if gc.nil?
  @gdk_drawable.draw_line(gc, x1, y1, x2, y2)
end

#draw_lines(points, color = nil, params = {}) ⇒ Object 



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# File 'lib/rabbit/renderer/engine/gdk.rb', line 64

def draw_lines(points, color=nil, params={})
  gc = make_gc(color, params)
  return if gc.nil?
  @gdk_drawable.draw_lines(gc, points)
end

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



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# File 'lib/rabbit/renderer/engine/gdk.rb', line 154

def draw_pixbuf(pixbuf, x, y, params={})
  gc = make_gc(params[:color], params)
  return if gc.nil?

  draw_scaled_pixbuf = params[:draw_scaled_pixbuf]
  draw_scaled_pixbuf = @draw_scaled_image if draw_scaled_pixbuf.nil?
  width = params[:width] || pixbuf.width
  height = params[:height] || pixbuf.height
  if draw_scaled_pixbuf and
      [width, height] != [pixbuf.width, pixbuf.height]
    pixbuf = pixbuf.scale(width, height)
  end
  args = [0, 0, x, y,
          width, height,
          params[:dither_mode] || Gdk::RGB::DITHER_NORMAL,
          params[:x_dither] || 0,
          params[:y_dither] || 0]
  @gdk_drawable.draw_pixbuf(gc, pixbuf, *args)
end

#draw_polygon(filled, points, color = nil, params = {}) ⇒ Object 



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# File 'lib/rabbit/renderer/engine/gdk.rb', line 142

def draw_polygon(filled, points, color=nil, params={})
  gc = make_gc(color, params)
  return if gc.nil?
  @gdk_drawable.draw_polygon(gc, filled, points)
end

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



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# File 'lib/rabbit/renderer/engine/gdk.rb', line 70

def draw_rectangle(filled, x, y, w, h, color=nil, params={})
  gc = make_gc(color, params)
  return if gc.nil?
  @gdk_drawable.draw_rectangle(gc, filled, x, y, w, h)
end

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



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# File 'lib/rabbit/renderer/engine/gdk.rb', line 76

def draw_rounded_rectangle(filled, x, y, w, h, radius, color=nil, params={})
  x_radius = params[:x_radius] || radius
  y_radius = params[:y_radius] || radius
  x_diameter = x_radius * 2
  y_diameter = y_radius * 2

  line_width = params[:line_width]

  inner_x = x + x_radius
  inner_y = y + y_radius
  inner_w = w - x_diameter
  inner_h = h - y_diameter

  if filled
    draw_rectangle(true, inner_x, inner_y, inner_w, inner_h, color)
  end

  if filled
    top = [inner_x, y, inner_w, y_radius]
    left = [x, inner_y, x_radius, inner_h]
    bottom = [inner_x, inner_y + inner_h, inner_w, y_radius]
    right = [inner_x + inner_w, inner_y, x_radius, inner_h]

    [top, left, bottom, right].each do |rx, ry, rw, rh|
      draw_rectangle(true, rx, ry, rw, rh, color)
    end
  else
    top = [inner_x, y, inner_x + inner_w, y]
    left = [x, inner_y, x, inner_y + inner_h]
    bottom = [inner_x, y + h, inner_x + inner_w, y + h]
    right = [x + w, inner_y, x + w, inner_y + inner_h]
    [top, left, bottom, right].each do |start_x, start_y, end_x, end_y|
      draw_line(start_x, start_y, end_x, end_y, color,
                {:line_width => line_width})
    end
  end

  upper_left = [x, y, 90]
  lower_left = [x, y + inner_h, 180]
  lower_right = [x + inner_w, y + inner_h, 270]
  upper_right = [x + inner_w, y, 0]
  [
   upper_left, lower_left,
   lower_right, upper_right
  ].each do |ax, ay, start_angle|
    draw_arc(filled, ax, ay, x_diameter, y_diameter,
             start_angle, 90, color, {:line_width => line_width})
  end
end

#finish_renderer ⇒ Object 



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# File 'lib/rabbit/renderer/engine/gdk.rb', line 27

def finish_renderer
  @gdk_drawables.pop
  @gdk_drawable = @gdk_drawables.pop
end

#foreground=(color) ⇒ Object 



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

def foreground=(color)
  @foreground.set_rgb_fg_color(color.to_gdk_color)
end

#init_renderer(drawable) ⇒ Object 



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# File 'lib/rabbit/renderer/engine/gdk.rb', line 23

def init_renderer(drawable)
  prepare_renderer(drawable)
end

#prepare_renderer(drawable) ⇒ Object 



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# File 'lib/rabbit/renderer/engine/gdk.rb', line 17

def prepare_renderer(drawable)
  @gdk_drawables ||= []
  @gdk_drawable = drawable
  @gdk_drawables.push(@gdk_drawable)
end