Script to turn a given image into a beautiful screenshot with rounded corners, drop shadow, and whitespace

Apply shadow to screenshot.kmmacros

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<array>
	<dict>
		<key>Activate</key>
		<string>Normal</string>
		<key>CreationDate</key>
		<real>622511872.68444896</real>
		<key>Macros</key>
		<array>
			<dict>
				<key>Actions</key>
				<array>
					<dict>
						<key>Conditions</key>
						<dict>
							<key>ConditionList</key>
							<array>
								<dict>
									<key>Button</key>
									<integer>0</integer>
									<key>ConditionType</key>
									<string>MouseButton</string>
								</dict>
							</array>
							<key>ConditionListMatch</key>
							<string>All</string>
						</dict>
						<key>MacroActionType</key>
						<string>PauseUntil</string>
						<key>TimeOutAbortsMacro</key>
						<true/>
					</dict>
					<dict>
						<key>Conditions</key>
						<dict>
							<key>ConditionList</key>
							<array>
								<dict>
									<key>Button</key>
									<integer>0</integer>
									<key>ConditionType</key>
									<string>MouseButton</string>
									<key>Pressed</key>
									<false/>
								</dict>
							</array>
							<key>ConditionListMatch</key>
							<string>All</string>
						</dict>
						<key>MacroActionType</key>
						<string>PauseUntil</string>
						<key>TimeOutAbortsMacro</key>
						<true/>
					</dict>
					<dict>
						<key>MacroActionType</key>
						<string>Pause</string>
						<key>Time</key>
						<string>0.2</string>
						<key>TimeOutAbortsMacro</key>
						<true/>
					</dict>
					<dict>
						<key>Conditions</key>
						<dict>
							<key>ConditionList</key>
							<array>
								<dict>
									<key>ClipboardConditionType</key>
									<string>HasImage</string>
									<key>ClipboardText</key>
									<string></string>
									<key>ConditionType</key>
									<string>Clipboard</string>
								</dict>
							</array>
							<key>ConditionListMatch</key>
							<string>All</string>
						</dict>
						<key>ElseActions</key>
						<array/>
						<key>MacroActionType</key>
						<string>IfThenElse</string>
						<key>ThenActions</key>
						<array>
							<dict>
								<key>Append</key>
								<false/>
								<key>Destination</key>
								<string>/Users/personal/Workspace/drop-shadow/temp.png</string>
								<key>Encoding</key>
								<string>UTF8</string>
								<key>Format</key>
								<string>PNG</string>
								<key>Format2</key>
								<string>PNG</string>
								<key>MacroActionType</key>
								<string>WriteFile</string>
								<key>Source</key>
								<string>Clipboard</string>
							</dict>
							<dict>
								<key>DisplayKind</key>
								<string>Window</string>
								<key>HonourFailureSettings</key>
								<true/>
								<key>IncludeStdErr</key>
								<true/>
								<key>MacroActionType</key>
								<string>ExecuteShellScript</string>
								<key>Path</key>
								<string>~/Workspace/drop-shadow/drop-shadow.sh</string>
								<key>Source</key>
								<string>Variable</string>
								<key>SourceVariable</key>
								<string>ClipboardImagePath</string>
								<key>Text</key>
								<string>./Users/personal/Workspace/drop-shadow/drop-shadow.sh /Users/personal/Workspace/drop-shadow/temp.png</string>
								<key>TimeOutAbortsMacro</key>
								<true/>
								<key>TrimResults</key>
								<true/>
								<key>TrimResultsNew</key>
								<true/>
								<key>UseText</key>
								<true/>
							</dict>
						</array>
						<key>TimeOutAbortsMacro</key>
						<true/>
					</dict>
				</array>
				<key>CreationDate</key>
				<real>622511932.61007595</real>
				<key>ModificationDate</key>
				<real>622522769.55805099</real>
				<key>Name</key>
				<string>Apply shadow to screenshot</string>
				<key>Triggers</key>
				<array>
					<dict>
						<key>FireType</key>
						<string>Pressed</string>
						<key>KeyCode</key>
						<integer>21</integer>
						<key>MacroTriggerType</key>
						<string>HotKey</string>
						<key>Modifiers</key>
						<integer>768</integer>
					</dict>
				</array>
				<key>UID</key>
				<string>5EFD8E79-1CE2-4B4E-95D6-A0156AF1379F</string>
			</dict>
		</array>
		<key>Name</key>
		<string>Global Macro Group</string>
		<key>ToggleMacroUID</key>
		<string>837A4569-414A-45B0-B086-D85B3AAE90D0</string>
		<key>UID</key>
		<string>55D3F2B4-0024-4857-9E8D-02CF4B05D3D2</string>
	</dict>
</array>
</plist>

drop-shadow.sh

#!/usr/bin/env bash

# ---------------------------------
# set this script as an executable:
# chmod u+x drop-shadow.sh

# example usage:
# ./Users/personal/Workspace/drop-shadow/drop-shadow.sh /Users/personal/Workspace/drop-shadow/temp.png
# ---------------------------------

# we need a filename as an argument
if [ $# -eq 0 ]; then
  echo "Needs the filename as the first argument"
  exit -1
fi

# warnings if you don't have the right CLI tools installed
type /usr/local/bin/convert >/dev/null 2>&1 || { echo >&2 "The convert command must be available (from imagemagick)."; exit 1; }
type /usr/local/bin/copyq >/dev/null 2>&1 || { echo >&2 "The copyq command must be available (from copyq)."; exit 1; }

# use our argument path as our input filename
input_filename="${1}"

# set our output directory for temp images
output_dir="/Users/personal/Workspace/drop-shadow/"

# https://stackoverflow.com/questions/965053/extract-filename-and-extension-in-bash#965072
filename=$(basename -- "${input_filename}")
extension="${filename##*.}"
filename="${filename%.*}"

# get the mean colorspace as a decimal
colorspace=$(/usr/local/bin/convert "${input_filename}" -colorspace gray -format "%[fx:100*mean]%%" info:)
colorspace=$(echo $colorspace|perl -pe 's{\d+\.\d+%}{$&/100}eg')

# chose shadow color based on colorspace of the image
chosen_shadow=""
if [ "`echo "${colorspace} < 0.1" | bc`" -eq 1 ]
then
  chosen_shadow="#000"
elif [ "`echo "${colorspace} < 0.2" | bc`" -eq 1 ]
then
  chosen_shadow="#222"
elif [ "`echo "${colorspace} < 0.6" | bc`" -eq 1 ]
then
  chosen_shadow="#333"
elif [ "`echo "${colorspace} < 0.91" | bc`" -eq 1 ]
then
  chosen_shadow="#AAA"
elif [ "`echo "${colorspace} < 1.0" | bc`" -eq 1 ]
then
  chosen_shadow="#B0B0B0"
else
  chosen_shadow="#000"
fi

# generate rounded corners for image
/usr/local/bin/convert "${input_filename}" \( +clone  -alpha extract -draw 'fill black polygon 0,0 0,15 15,0 fill white circle 15,15 15,0' \( +clone -flip \) -compose Multiply -composite \( +clone -flop \) -compose Multiply -composite \) -alpha off -compose CopyOpacity -composite "${output_dir}${filename}_shadow.${extension}"

# generate shadow for image
/usr/local/bin/convert "${output_dir}${filename}_shadow.${extension}" \( +clone -background "${chosen_shadow}" -shadow 100x40+0+16 \) +swap -background none -layers merge +repage "${output_dir}${filename}_shadow.${extension}"

# generate whitespace for image
/usr/local/bin/convert "${output_dir}${filename}_shadow.${extension}" -bordercolor none -border 50 -gravity south -background none -splice 0x60 "${output_dir}${filename}_shadow.${extension}"

# copy generated image to clipboard
/usr/local/bin/copyq write image/png - < "${output_dir}${filename}_shadow.${extension}" && /usr/local/bin/copyq select 0