Add Basic Argyll CMS Display Calibration Commands

Copied from https://gdargaud.net/Hack/LinuxSpyder.html, annotated with
additional notes from --help output, and slightly modified for higher
quality.

bin/calibrate-display.sh

+#!/usr/bin/env bash
+
+# Taken and modified from
+# https://gdargaud.net/Hack/LinuxSpyder.html
+
+# Calibrate the display with a set of color patches
+# From --help
+#
+# -d n[,m]             Choose the display n from the following list (default 1)
+#                      Optionally choose different display m for VideoLUT access
+#    1 = 'Monitor 1, Output eDP-1 at 1, 0, width 3840, height 2160'
+#    2 = 'Monitor 2, Output DP-2 at 0, 2160, width 3840, height 1100'
+#
+# -c listno            Choose instrument from the following list (default 1)
+#    1 = '/dev/bus/usb/001/004 (ColorVision Spyder2)'
+#
+# -P ho,vo,ss[,vs]     Position test window and scale it
+#                      ho,vi: 0.0 = left/top, 0.5 = center, 1.0 = right/bottom etc.
+#                      ss: 0.5 = half, 1.0 = normal, 2.0 = double etc.
+#
+# -m                   Skip adjustment of the monitor controls
+#
+# inoutfile            Base name for created or updated .cal and .icc output files
+#
+
+# For the screenpad (lower screen) on the Asus UX581L
+# displays patches over most of the left side of the screen
+dispcal -d2 -c1 -P 0.0,0.5,2.5 -m screenpad
+
+# Generate a profiling test target values .til file
+# From --help
+#
+# -d col_comb     choose colorant combination from the following:
+#                 0: Print grey
+#                 1: Video grey
+#                 2: Print RGB
+#                 3: Video RGB
+#                 ...
+#
+
+# Original site suggested -f250 to limit the number of patches but default is 836
+targen -d3 screenpad
+
+# Display test patches on a monitor, read the colorimetric value and create the chart readings file with calibration applied
+# From --help
+#
+# -d, -c, and -P are same as dispcal
+#
+# -k file.cal          Load calibration file into display while reading
+#
+
+dispread -d2 -c1 -P 0.0,0.5,2.5 -k screenpad.cal screenpad
+
+# Create an ICC profile from the ti3 test chart patch values
+# From --help
+#
+# -A manufacturer Manufacturer description string
+#
+# -M model        Model description string
+#
+# -D description  Profile Description string (Default "inoutfile")
+#
+# -a lxXgsmGS     Algorithm type override
+#                 l = Lab cLUT (def.), x = XYZ cLUT, X = display XYZ cLUT + matrix
+#                 g = gamma+matrix, s = shaper+matrix, m = matrix only,
+#                 G = single gamma+matrix, S = single shaper+matrix
+#
+
+# Original site suggested -a S but -a l seems to be a better choice?
+# Screenpad manufacturer & model per
+# https://linux-hardware.org/?probe=d33dee579a
+colprof -A "BOE" -M "BOE085F" -D "Asus Zenbook Pro Duo Screenpad ($(date +%Y-%m-%d_%H-%M))" screenpad
+# Mainscreen Asus UX581L manufacturer & model from same scrape
+# colprof -A "Samsung" -M "SDCA029" -D "Asus Zenbook Pro Duo ($(date +%Y-%m-%d_%H-%M))" ux581l