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   1  <?php
   2  
   3  abstract class PhabricatorLipsumArtist {
   4  
   5    protected function getHSBColor($h, $s, $b) {
   6      if ($s == 0) {
   7        $cr = $b;
   8        $cg = $b;
   9        $cb = $b;
  10      } else {
  11        $h /= 60;
  12        $i = (int)$h;
  13        $f = $h - $i;
  14        $p = $b * (1 - $s);
  15        $q = $b * (1 - $s * $f);
  16        $t = $b * (1 - $s * (1 - $f));
  17        switch ($i) {
  18          case 0:
  19            $cr = $b;
  20            $cg = $t;
  21            $cb = $p;
  22            break;
  23          case 1:
  24            $cr = $q;
  25            $cg = $b;
  26            $cb = $p;
  27            break;
  28          case 2:
  29            $cr = $p;
  30            $cg = $b;
  31            $cb = $t;
  32            break;
  33          case 3:
  34            $cr = $p;
  35            $cg = $q;
  36            $cb = $b;
  37            break;
  38          case 4:
  39            $cr = $t;
  40            $cg = $p;
  41            $cb = $b;
  42            break;
  43          default:
  44            $cr = $b;
  45            $cg = $p;
  46            $cb = $q;
  47            break;
  48        }
  49      }
  50  
  51      $cr = (int)round($cr * 255);
  52      $cg = (int)round($cg * 255);
  53      $cb = (int)round($cb * 255);
  54  
  55      return ($cr << 16) + ($cg << 8) + $cb;
  56    }
  57  
  58    public function generate($x, $y) {
  59      $image = imagecreatetruecolor($x, $y);
  60      $this->draw($image, $x, $y);
  61      return PhabricatorImageTransformer::saveImageDataInAnyFormat(
  62        $image,
  63        'image/jpeg');
  64    }
  65  
  66    abstract protected function draw($image, $x, $y);
  67  
  68  }