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PhabricatorLipsumArtist.php
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			<?php

			abstract class PhabricatorLipsumArtist extends Phobject {

			protected function getHSBColor($h, $s, $b) {
			if ($s == 0) {
			$cr = $b;
			$cg = $b;
			$cb = $b;
			} else {
			$h /= 60;
			$i = (int)$h;
			$f = $h - $i;
			$p = $b * (1 - $s);
			$q = $b * (1 - $s * $f);
			$t = $b * (1 - $s * (1 - $f));
			switch ($i) {
			case 0:
			$cr = $b;
			$cg = $t;
			$cb = $p;
			break;
			case 1:
			$cr = $q;
			$cg = $b;
			$cb = $p;
			break;
			case 2:
			$cr = $p;
			$cg = $b;
			$cb = $t;
			break;
			case 3:
			$cr = $p;
			$cg = $q;
			$cb = $b;
			break;
			case 4:
			$cr = $t;
			$cg = $p;
			$cb = $b;
			break;
			default:
			$cr = $b;
			$cg = $p;
			$cb = $q;
			break;
			}
			}

			$cr = (int)round($cr * 255);
			$cg = (int)round($cg * 255);
			$cb = (int)round($cb * 255);

			return ($cr << 16) + ($cg << 8) + $cb;
			}

			public function generate($x, $y) {
			$image = imagecreatetruecolor($x, $y);
			$this->draw($image, $x, $y);
			return PhabricatorImageTransformer::saveImageDataInAnyFormat(
			$image,
			'image/jpeg');
			}

			abstract protected function draw($image, $x, $y);

			}