mklogo

   1 #!/bin/bash
   2
   3 # Script for Image Magick that writes the dss logo in png format
   4 # to stdout.
   5
   6 set -u
   7
   8 width=320
   9 height=110
  10 border=5
  11 radius1=4
  12 radius2=5
  13 circle_y=90
  14 arrow_y=70
  15 text_x=128
  16 text_y=55
  17 pointsize=36
  18
  19 declare -a circle arrow rectangle text
  20
  21 make_circles()
  22 {
  23         local inner='stroke black fill red circle'
  24         local outer='stroke black fill black circle'
  25         local num=1
  26         local idx=0
  27         local y=$circle_y
  28         local step x0 i j idx num
  29
  30         for ((i = 0; i < 4; i++)); do
  31                 step=$(((width / 4 + num) / (num + 1)))
  32                 x0=$((border + width / 4 * i))
  33                 for ((j = 1; j <= $num; j++)); do
  34                         x=$((x0 + j * $step))
  35                         circle[$idx]='-draw'; let idx++
  36                         circle[$idx]="$outer $x,$y,$((x + radius2)),$y"; let idx++
  37                         circle[$idx]='-draw'; let idx++
  38                         circle[$idx]="$inner $x,$y,$((x + radius1)),$y"; let idx++
  39                 done
  40                 num=$((num * 2))
  41         done
  42         #echo "${circle[@]}"; exit 0
  43 }
  44
  45 make_arrow()
  46 {
  47         local arrow_head='l -15,-5  +5,+5  -5,+5  +15,-5 z'
  48         local idx=0
  49         local x0 x1 y
  50
  51         arrow[$idx]='-draw'; let idx++
  52         x0=$((3 * border)); x1=$((width - 2 * border))
  53         y=$arrow_y
  54         arrow[$idx]="stroke white line $x0,$y $x1,$y"; let idx++
  55         arrow[$idx]='-draw'; let idx++
  56         x0=$((width - 2 * border))
  57         arrow[$idx]="stroke white fill white path 'M $x0,$y $arrow_head'"
  58         #echo "${arrow[@]}"; exit 0
  59 }
  60
  61 make_rectangles()
  62 {
  63         local idx=0
  64         local x x0 x1 y y0 y1 i red_green color
  65
  66         rectangle[$idx]='-draw'; let idx++
  67         x=$((width + 2 * border))
  68         y=$((height + 2 * border))
  69         rectangle[$idx]="stroke yellow fill yellow rectangle 0,0 $x,$y"; let idx++
  70         for ((i = 0; i < 4; i++)); do
  71                 rectangle[$idx]='-draw'; let idx++
  72                 red_green="$(printf '%02x' $(((3 - i) * 60)))"
  73                 color="#${red_green}${red_green}ff"
  74                 x0=$((border + i * width / 4)); x1=$((x0 + width / 4 - 1))
  75                 y0=$border; y1=$((y0 + height))
  76                 rectangle[$idx]="stroke $color fill $color rectangle $x0,$y0 $x1,$y1"
  77                 let idx++
  78         done
  79         #echo "${rectangle[@]}"; exit 0
  80 }
  81
  82 make_text()
  83 {
  84         text=(-pointsize $pointsize -draw \
  85                 "fill white text $text_x,$text_y DSS")
  86         #echo "${text[@]}"; exit 0
  87 }
  88
  89 make_rectangles
  90 make_arrow
  91 make_circles
  92 make_text
  93
  94 convert -size $((width + 2 * border))x$((height + 2 * border)) \
  95         -background none xc: \
  96         "${rectangle[@]}" \
  97         "${arrow[@]}" \
  98         "${circle[@]}" \
  99         "${text[@]}" \
 100         png:-