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;;; This file uses the Guile Picture Language to generate the GNU
;;; Assembly logo variants and favicon.
;;;
;;; The League spartan font is available here:
;;; https://www.theleagueofmoveabletype.com/league-spartan
;;;
;;; After generating the SVG files, any text should be converted to
;;; paths so that viewers don't need to have that font installed. The
;;; picture language cannot do this yet, so I recommend using
;;; Inkscape manually.
;;;
;;; The logo is released under CC-BY-SA 4.0 or any other license as
;;; agreed upon after a vote by the GNU Assembly.
;;;
;;; ~~ Ricardo
(import (pict)
(srfi :1))
(define palette
(list "#073b4c"
"#118ab2"
"#06d6a0"
"#ffd166"
"#ef476f"))
(define hill-color
"#ffe9b2")
(define next-color
(let ((index 0)
(palette* (list-tail palette 1)))
(lambda ()
(set! index (modulo (1+ index)
(length palette*)))
(list-ref palette* index))))
(define* (wildebeest #:key (color "black"))
(fill
(path
(list (move-to '(14 . 5))
;; The wildebeest is drawn counter-clockwise, starting from
;; the right horn.
;; head
(curve '((-1.6 . 1.2) (-2.5 . 1.4) (-2.5 . 0.7)))
(curve '((0 . -0.4) (-1.9 . -5.4) (-2.3 . -5.3)))
(curve '((-0.2 . 0) (2 . 4.1) (0.3 . 5.9)))
(curve '((-0.9 . 1.2) (-1.9 . 0.8) (-3.2 . 1.1)))
(curve '((-0.7 . 0.2) (-0.9 . -0.3) (-1 . -0.7)))
(curve '((-0.3 . -1.9) (0.7 . -6.6) (0.4 . -6)))
(curve '((-0.67 . 1.32) (-1 . 2.7) (-1.5 . 5.1)))
(curve '((-0.5 . 2.5) (-1.6 . 2.8) (-2.3 . 4.8)))
(curve '((-1.5 . 4.1) (-2.1 . 8.9) (-1.1 . 11.3)))
(curve '((0.5 . 1.3) (0.9 . 1) (2.3 . 0.8)))
(curve '((0.3 . 0) (0.7 . -0.7) (1 . -0.7)))
(curve '((0.7 . 0) (1.1 . 0.8) (1.8 . 1.2)))
(curve '((1.3 . 0.6) (2.5 . 1.5) (2.3 . 1.1)))
(curve '((-0.2 . -0.3) (-0.1 . -0.9) (0 . -1.2)))
(curve '((0.2 . -0.7) (0.4 . -0.7) (1.6 . -0.2)))
;; right foreleg
(curve '((0.7 . 0.3) (1.5 . 0.8) (1.7 . 1.1)))
(curve '((0.2 . 0.3) (0.5 . 0.7) (1.9 . 1.3)))
(curve '((1 . 0.4) (2.1 . 0.9) (2.1 . 1.1)))
(curve '((0 . 0.7) (-1 . 1) (-1.8 . 1.7)))
(curve '((-0.8 . 0.7) (-2.4 . 2) (-2.6 . 2.9)))
(curve '((-0.2 . 0.7) (2.7 . 4) (3.2 . 4.7)))
(curve '((0.1 . 0.8) (0.7 . 0.7) (0.9 . 1.7)))
(curve '((0.3 . 0.8) (0.8 . 1.4) (2.4 . 2.8)))
(curve '((1.9 . 1.6) (2.5 . 1.6) (2.4 . 1)))
(curve '((-0.2 . -0.8) (-0.5 . -4.2) (-1.2 . -4.2)))
(curve '((-0.4 . 0) (-0.9 . 0.6) (-1 . 0.2)))
(curve '((-0.1 . -0.5) (-0.4 . -0.6) (-0.8 . -0.6)))
(curve '((-0.2 . 0) (-1.7 . -2.4) (-2 . -2.4)))
(curve '((-0.3 . -0.3) (-1.7 . -2.8) (-1.7 . -2.8)))
;; left foreleg
(curve '((0 . 0) (2.3 . -1.7) (2.2 . -1.7)))
(curve '((0 . 0) (-1.2 . 1.7) (-1.9 . 3.5)))
(curve '((-0.9 . 2.2) (-1.2 . 4.2) (-1.5 . 4.8)))
(curve '((-0.2 . 0.4) (-0.5 . 0.5) (-1 . 1.3)))
(curve '((-0.5 . 0.8) (-0.7 . 1.6) (-0.1 . 2.8)))
(curve '((0.4 . 0.9) (4 . -2.2) (3.4 . -3.7)))
(curve '((-0.4 . -1.10) (0.5 . -3.4) (0.7 . -4.1)))
(curve '((0.5 . -1.8) (1.7 . -3.1) (3.2 . -4.4)))
(curve '((2.5 . -2) (2.2 . -2) (9.1 . -0.7)))
;; left hindleg
(curve '((2.8 . 0.5) (2.8 . 0.2) (4.9 . 2.7)))
(curve '((1.1 . 1.4) (4 . 3.9) (5.1 . 6.4)))
(curve '((0.2 . 0.4) (0.3 . 0.7) (0.3 . 1.2)))
(curve '((-0.4 . 1.5) (-0.3 . 3.7) (-1.4 . 5)))
(curve '((-0.5 . 1) (-1.5 . 2.1) (0.2 . 1.9)))
(line-to '(2.2 . 0))
(line-to '(0.3 . -2.3))
(curve '((0.3 . -2.2) (0 . -5) (0.4 . -7.2)))
(curve '((0.1 . -0.2) (-3.8 . -4) (-3.8 . -4.4)))
(curve '((0 . -0.5) (-0.2 . -2.8) (0 . -2.7)))
;; right hindleg
(curve '((0.2 . 0.1) (0.4 . 3.7) (0.5 . 4.2)))
(curve '((0.1 . 0.6) (-0.5 . 1.6) (-2.6 . 3.6)))
(curve '((-3.1 . 3) (-4.3 . 4.6) (-4.4 . 5.4)))
(curve '((0 . 0.8) (2.2 . 0.7) (2.9 . -0.1)))
(curve '((0.4 . -0.4) (1 . -2.4) (1 . -2.4)))
(curve '((1.4 . -1.4) (3 . -3.2) (4.1 . -3.7)))
(line-to '(1 . -1.9))
(curve '((0.1 . -1.7) (-1 . -7.2) (0.3 . -8.8)))
(curve '((0.3 . -0.4) (1.2 . -3) (1.2 . -3)))
;; tail
(curve '((0.5 . 1.8) (4 . 4.7) (4 . 4.7)))
(curve '((-0.5 . -0.8) (-0.4 . -0.9) (-0.4 . -0.9)))
(curve '((0 . 0) (2.8 . 0.9) (4.2 . 0.5)))
(curve '((2 . -0.6) (4.8 . -4) (4.8 . -4)))
(curve '((-1.3 . 1.1) (-1.3 . 0.8) (-2.5 . 1.2)))
(curve '((0 . 0) (0.8 . -1) (1.1 . -1.4)))
(curve '((1 . -1.4) (1.6 . -3.6) (2 . -5.1)))
(curve '((-0.2 . 0.4) (-0.4 . 0.4) (-0.5 . 0.4)))
(curve '((-0.2 . -0.6) (1.1 . -3.3) (1.1 . -3.3)))
(curve '((-0.9 . 0.9) (-1.8 . 1.8) (-2.6 . 3.2)))
(curve '((-1.3 . 2.2) (-2.4 . 4.7) (-4.4 . 6.2)))
(curve '((-1.3 . 1) (-4.8 . -2) (-4.8 . -2)))
(curve '((-1.4 . -0.9) (-1.5 . -2.1) (-1.7 . -2.1)))
;; back
(line-to '(0.1 . 0.2))
(curve '((0.2 . -2.4) (-3 . -5.4) (-4.4 . -6.3)))
(curve '((-5.8 . -1.4) (-7.4 . -2.16) (-9.8 . -3.9)))
(curve '((0 . 0) (2.8 . 0.4) (3.3 . -0.8)))
(curve '((-1.1 . 0.6) (-3.6 . -0.2) (-5.6 . -1.2)))
(curve '((-3.5 . -1.9) (-4 . -2.6) (-5.2 . -2.6)))
(curve '((-0.8 . 0) (-1.9 . -0.2) (-1.9 . -1)))
(curve '((-0.1 . -0.8) (0.3 . -0.8) (1.5 . -1.2)))
(curve '((-0.7 . -0.1) (-2.5 . 0.2) (-3.6 . 1.1)))
(close-path))
#:stroke-width 0)
color))
(define parliament
(begin
(next-color)(next-color)
(rotate
(apply cc-superimpose
(map (lambda (n)
(let ((segment (disk 18 #:color (next-color))))
(rotate (expand segment #:right 130)
(* n 24))))
(iota 8)))
-35)))
(define hill
(scale
(fill
(polygon '((0 . 30)
(10 . 30)
(20 . 25)
(40 . 20)
(60 . 5)
(80 . 10)
(100 . 30))
#:border-width 0)
hill-color)
2.8))
(define composition
(expand
(cc-superimpose
(expand parliament #:bottom 40)
(expand hill #:top 20)
(expand
(scale (wildebeest #:color (first palette)) 2.8)
#:left 80))
#:bottom -50
#:left -20))
(define composition-with-text
(expand
(vc-append
composition
(hb-append
(text "the"
#:border-width 0
#:font-family "League spartan Light"
#:color (first palette)
#:font-size 32)
(expand
(text "gnu"
#:border-width 0
#:font-family "League spartan ExtraBold"
#:color (second palette)
#:font-size 32)
#:left 5
#:right 5)
(text "assembly"
#:border-width 0
#:font-family "League spartan Light"
#:color (first palette)
#:font-size 32)))
#:bottom 10))
(define favicon
(let ((circles
(expand (scale parliament 0.5)
#:amount -10)))
(scale
(cc-superimpose
(filled-rectangle
(pict-width circles)
(pict-height circles)
#:color "white")
circles
(expand (text "g"
#:border-width 0
#:font-family "League spartan ExtraBold"
#:color (first palette)
#:font-size 64)
#:left 5))
0.3)))
(define small-wildebeest
(wildebeest #:color (first palette)))
(pict->file composition-with-text "/tmp/logo.svg")
(pict->file composition "/tmp/logo-small.svg")
(pict->file favicon "/tmp/favicon.svg")
(pict->file small-wildebeest "/tmp/wildebeest.svg")
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