Data commit

Task/Pinstripe-Printer/Julia/pinstripe-printer.julia

@@ -0,0 +1,26 @@
+using FileIO, ImageIO
+
+function getnumberwithprompt(prompt, t::Type)
+    s = ""
+    while (x = tryparse(t, s)) == nothing
+        print("\n", prompt, ": -> ")
+        s = strip(readline())
+    end
+    return x
+end
+
+dpi = getnumberwithprompt("Printer DPI (dots per inch)", Int)
+pwidth = getnumberwithprompt("Printer width (inches)", Float64)
+plength = 10.0
+
+imgwidth, imgheight = Int(round(pwidth * dpi)), Int(round(plength * dpi))
+
+img = zeros(UInt8, Int(round(imgheight)), Int(round(imgwidth)))
+
+for row in 1:imgheight, col in 1:imgwidth
+    stripewidth = div(row, dpi) + 1
+    img[row, col] = rem(col, stripewidth * 2) < stripewidth ? 0 : 255
+end
+
+save("temp.png", img)
+run(`print temp.png`)  # the run statement may need to be set up for the installed device