mklogo

   1 #!/bin/bash
   2 # SPDX-License-Identifier: GPL-2.0
   3
   4 # Script for Image Magick that writes the dss logo in png format
   5 # to stdout.
   6
   7 set -u
   8
   9 width=320
  10 height=110
  11 border=5
  12 radius1=4
  13 radius2=5
  14 circle_y=90
  15 arrow_y=70
  16 text_x=128
  17 text_y=55
  18 pointsize=36
  19
  20 declare -a circle arrow rectangle text
  21
  22 make_circles()
  23 {
  24         local inner='stroke black fill red circle'
  25         local outer='stroke black fill black circle'
  26         local num=1
  27         local idx=0
  28         local y=$circle_y
  29         local step x0 i j idx num
  30
  31         for ((i = 0; i < 4; i++)); do
  32                 step=$(((width / 4 + num) / (num + 1)))
  33                 x0=$((border + width / 4 * i))
  34                 for ((j = 1; j <= $num; j++)); do
  35                         x=$((x0 + j * $step))
  36                         circle[$idx]='-draw'; let idx++
  37                         circle[$idx]="$outer $x,$y,$((x + radius2)),$y"; let idx++
  38                         circle[$idx]='-draw'; let idx++
  39                         circle[$idx]="$inner $x,$y,$((x + radius1)),$y"; let idx++
  40                 done
  41                 num=$((num * 2))
  42         done
  43         #echo "${circle[@]}"; exit 0
  44 }
  45
  46 make_arrow()
  47 {
  48         local arrow_head='l -15,-5  +5,+5  -5,+5  +15,-5 z'
  49         local idx=0
  50         local x0 x1 y
  51
  52         arrow[$idx]='-draw'; let idx++
  53         x0=$((3 * border)); x1=$((width - 2 * border))
  54         y=$arrow_y
  55         arrow[$idx]="stroke white line $x0,$y $x1,$y"; let idx++
  56         arrow[$idx]='-draw'; let idx++
  57         x0=$((width - 2 * border))
  58         arrow[$idx]="stroke white fill white path 'M $x0,$y $arrow_head'"
  59         #echo "${arrow[@]}"; exit 0
  60 }
  61
  62 make_rectangles()
  63 {
  64         local idx=0
  65         local x x0 x1 y y0 y1 i red_green color
  66
  67         rectangle[$idx]='-draw'; let idx++
  68         x=$((width + 2 * border))
  69         y=$((height + 2 * border))
  70         rectangle[$idx]="stroke yellow fill yellow rectangle 0,0 $x,$y"; let idx++
  71         for ((i = 0; i < 4; i++)); do
  72                 rectangle[$idx]='-draw'; let idx++
  73                 red_green="$(printf '%02x' $(((3 - i) * 60)))"
  74                 color="#${red_green}${red_green}ff"
  75                 x0=$((border + i * width / 4)); x1=$((x0 + width / 4 - 1))
  76                 y0=$border; y1=$((y0 + height))
  77                 rectangle[$idx]="stroke $color fill $color rectangle $x0,$y0 $x1,$y1"
  78                 let idx++
  79         done
  80         #echo "${rectangle[@]}"; exit 0
  81 }
  82
  83 make_text()
  84 {
  85         text=(-pointsize $pointsize -draw \
  86                 "fill white text $text_x,$text_y DSS")
  87         #echo "${text[@]}"; exit 0
  88 }
  89
  90 make_rectangles
  91 make_arrow
  92 make_circles
  93 make_text
  94
  95 convert -size $((width + 2 * border))x$((height + 2 * border)) \
  96         -background none xc: \
  97         "${rectangle[@]}" \
  98         "${arrow[@]}" \
  99         "${circle[@]}" \
 100         "${text[@]}" \
 101         png:-