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);

	}