rcairoのスクリプトをmruby-cairoで試してみた

こちらにあったrcairoのスクリプトをmruby-cairoで試してみました。

W = 128
H = 160

RST = 21

width, height = W, H

num_enable = true

fpsv = 24

fontname = "/root/fonts/6x13.pcf"

def radians(ang)
  return (ang.to_f * Math::PI / 180.0)
end

def draw_watch(cr, cx, cy, r, fpsv, num_enable, fontname)
  rd = [0.97, 0.90, 0.87, 0.84, 0.82] 
  rdnum = [0.80, 0.76, 0.63]
  lv = [0.0, 0.0, 0.0, 0.0]
  wd = 1.1

  c = 0.0
  cr.set_source_rgb(c, c, c)
  cr.set_line_width(wd)
  cr.arc( cx, cy, r * rd[0], 0, 2 * Math::PI)
  cr.arc( cx, cy, r * rd[1], 0, 2 * Math::PI)
  cr.arc( cx, cy, r * rd[2], 0, 2 * Math::PI)
  cr.stroke()

  (6*fpsv).times do |i|
    ang = radians(360.0 * i / (6 * fpsv) - 90)

    x0 = (r * rd[0]) * Math.cos(ang) + cx
    y0 = (r * rd[0]) * Math.sin(ang) + cy

    if ( i % fpsv ) == 0 then
      rr = r * rd[4]
      c = lv[3]
      l = wd * 3.0
    elsif (i % (fpsv / 4) ) == 0 then
      rr = r * rd[3]
      c = lv[2]
      l = wd
    elsif (i % (fpsv/8) ) == 0 then
      rr = r * rd[2]
      c = lv[1]
      l = wd
    else
      rr = r * rd[1]
      c = lv[0]
      l = wd
    end

    x1 = rr.to_f * Math.cos(ang) + cx
    y1 = rr.to_f * Math.sin(ang) + cy

    cr.set_source_rgb(c, c, c)
    cr.set_line_width(l)
    cr.move_to(x0, y0)
    cr.line_to(x1, y1)
    cr.stroke()
  end

  if num_enable then

    (6*4).times do |i|
      ang = radians(360.0 * i / (6*4) - 90)
      if (i % 4) == 0 then
        s = [6,1,2,3,4,5][i/4]
        fsize = r * 0.13
        r5 = r * rdnum[1]
      else
        s = [0,6,12,18][i%4]
        fsize = r * 0.07
        r5 = r * rdnum[0]
      end
      s = s.to_s

      x0 = r5 * Math.cos(ang) + cx
      y0 = r5 * Math.sin(ang) + cy

      cr.move_to(x0, y0)
      cr.font_create(fontname)
      cr.set_font_size(fsize)
      cr.show_text(s)

    end
    6.times do |i|
      ang = radians(360.0 * i / 6 - 90.0)
      s = [-1,7,8,9,10,11][i]
      next if s == -1
      s = s.to_s
      fsize = r * 0.07
      r5 = r * rdnum[2]
      x0 = r5 * Math.cos(ang) + cx
      y0 = r5 * Math.sin(ang) + cy
      cr.move_to(x0, y0)
      cr.font_create(fontname)
      cr.set_font_size(fsize)
      cr.show_text(s)
    end

  end

end

tft = BsdTft.new(1, 0, BsdTft::S6D0151)

tft.setsize(W, H)
tft.setreset(RST)
tft.init

tft.cls(0)

c = Cairo.new(W, H)
c.set_source_rgb(1, 1, 1)
c.paint

cx = width / 2
cy = height / 2
rb = ([width,height].min) / 2

draw_watch(c, cx, cy, rb, fpsv, num_enable, fontname)

tft.lcdCopy(c.get_data)

文字の表示方法が違うところ以外はそのままでいけました。