quick wrapper for displayplacer on mac os

dp.php

#!env php
<?php

// placed in ~/Local/bin, chmoded, with that added to PATH.
// requires: https://github.com/jakehilborn/displayplacer
// use `displayplacer list` to find your screen id and supported modes. then
// update the screen id and sizes to have what you want.

// $ dp <size>

$ScreenID = '37D8832A-2D66-02CA-B9F7-8F30A301B230';

$Sizes = [

	// 1600x1000 (fills built-in screen)
	// a compromise between space and reading comfort on the macbook.
	'normal' => sprintf('displayplacer "id:%s mode:12"', $ScreenID),

	// 1920x1200 (fills built-in screen)
	// on the tiny macbook screen it is too small to be comfortable from more
	// than a foot away from the screen.
	'native' => sprintf('displayplacer "id:%s mode:15"', $ScreenID),

	// 1920x1080 (black bars on built-in)
	// so i can fill my remote desktop window properly on real computers with
	// good screens.
	'wide' => sprintf('displayplacer "id:%s mode:14"', $ScreenID)

];

////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////

$Args = $_SERVER['argv'];
$Size = array_pop($Args);

if(!array_key_exists($Size, $Sizes)) {
	echo 'invalid size: ', $Size, PHP_EOL, PHP_EOL;
	echo 'sizes: ', join(', ', array_keys($Sizes)), PHP_EOL, PHP_EOL;
	exit(1);
}

system($Sizes[$Size]);
exit(0);