Add logo (#320)

* Add logo

* Add dark logo

* Rm gitkeep

Author: gdalle

README.md

@@ -1,4 +1,4 @@
-# BenchmarkTools.jl
+# BenchmarkTools.jl <picture> <source media="(prefers-color-scheme: dark)" srcset="./docs/build/assets/logo-dark.svg" width="100" height="100"> <img alt="BenchmarkTools logo" src="./docs/build/assets/logo.svg" width="100" height="100"> </picture>
 
 [![][docs-stable-img]][docs-stable-url]
 [![][docs-dev-img]][docs-dev-url]

docs/generate_logo.jl

@@ -0,0 +1,44 @@
+using Pkg
+Pkg.activate(; temp=true)
+Pkg.add("Luxor")
+using Luxor
+
+JULIA_COLORS = [Luxor.julia_blue, Luxor.julia_green, Luxor.julia_red, Luxor.julia_purple]
+
+function draw_logo(; path, dark=false)
+    Drawing(500, 500, path)
+    origin()
+    squircle(O, 250, 250, :clip, rt=0.3)
+    sethue(dark ? "black" : "white")
+    paint()
+
+    @layer begin
+        translate(0, 200)
+        rmin = 150
+        rmax = 260
+        band = 40
+
+        for n in 1:4
+            setblend(blend(O - (240, 0), O + (240, 0), "white", JULIA_COLORS[n]))
+            sector(O,
+                rescale(n, 1, 3, rmin, rmax),
+                rescale(n, 1, 3, rmin, rmax) + band,
+                3π / 2 - deg2rad(45), 3π / 2 + deg2rad(45),
+                :fill)
+        end
+
+        sethue(dark ? "black" : "white")
+        setline(25)
+        line(O, polar(400, deg2rad(290)), :strokepreserve)
+        setline(14)
+        sethue(dark ? "white" : "black")
+        strokepath()
+        circle(O, 30, :fill)
+    end
+
+    finish()
+    preview()
+end
+
+draw_logo(path=joinpath(@__DIR__, "src", "assets", "logo.svg"), dark=false)
+draw_logo(path=joinpath(@__DIR__, "src", "assets", "logo-dark.svg"), dark=true)