RackTables git mirrors - racktables/blob - render_rack_thumb.php

   1 <?php
   2
   3 // This page outputs PNG rack thumbnail.
   4
   5 require 'inc/init.php';
   6
   7 // Thumbnails are rendered in security context of rackspace.
   8 $pageno = 'rackspace';
   9 $tabno = 'default';
  10 authorize();
  11
  12 assertUIntArg ('rack_id');
  13 renderRackThumb ($_REQUEST['rack_id']);
  14
  15 //------------------------------------------------------------------------
  16 function renderError ()
  17 {
  18         // A hardcoded value is worth of saving lots of code here.
  19         $img = imagecreatefrompng ('pix/error.png');
  20         header("Content-type: image/png");
  21         imagepng ($img);
  22         imagedestroy ($img);
  23 }
  24
  25 // Having a local caching array speeds things up. A little.
  26 function colorFromHex ($image, $hex)
  27 {
  28         static $colorcache = array ();
  29         if (isset ($colorcache[$hex]))
  30                 return $colorcache[$hex];
  31         $r = hexdec ('0x' . substr ($hex, 0, 2));
  32         $g = hexdec ('0x' . substr ($hex, 2, 2));
  33         $b = hexdec ('0x' . substr ($hex, 4, 2));
  34         $c = imagecolorallocate ($image, $r, $g, $b);
  35         $colorcache[$hex] = $c;
  36         return $c;
  37 }
  38
  39 function renderRackThumb ($rack_id = 0)
  40 {
  41         if (($rackData = getRackData ($rack_id, TRUE)) == NULL)
  42         {
  43                 renderError();
  44                 return;
  45         }
  46         markupObjectProblems ($rackData);
  47         // Cache in a local array, because we are going to use those values often.
  48         $rtwidth = array
  49         (
  50                 0 => getConfigVar ('rtwidth_0'),
  51                 1 => getConfigVar ('rtwidth_1'),
  52                 2 => getConfigVar ('rtwidth_2')
  53         );
  54         $offset[0] = 3;
  55         $offset[1] = 3 + $rtwidth[0];
  56         $offset[2] = 3 + $rtwidth[0] + $rtwidth[1];
  57         $totalheight = 3 + 3 + $rackData['height'] * 2;
  58         $totalwidth = $offset[2] + $rtwidth[2] + 3;
  59         $img = @imagecreatetruecolor ($totalwidth, $totalheight)
  60                 or die("Cannot Initialize new GD image stream");
  61         // cache our palette as well
  62         $color = array();
  63         foreach (array ('F', 'A', 'U', 'T', 'Th', 'Tw', 'Thw') as $statecode)
  64                 $color[$statecode] = getConfigVar ('color_' . $statecode);
  65         imagerectangle ($img, 0, 0, $totalwidth - 1, $totalheight - 1, colorFromHex ($img, '000000'));
  66         imagerectangle ($img, 1, 1, $totalwidth - 2, $totalheight - 2, colorFromHex ($img, 'c0c0c0'));
  67         imagerectangle ($img, 2, 2, $totalwidth - 3, $totalheight - 3, colorFromHex ($img, '000000'));
  68         for ($unit_no = $rackData['height']; $unit_no > 0; $unit_no--)
  69         {
  70                 for ($locidx = 0; $locidx < 3; $locidx++)
  71                 {
  72                         $colorcode = $rackData[$unit_no][$locidx]['state'];
  73                         if (isset ($rackData[$unit_no][$locidx]['hl']))
  74                                 $colorcode = $colorcode . $rackData[$unit_no][$locidx]['hl'];
  75                         imagerectangle
  76                         (
  77                                 $img,
  78                                 $offset[$locidx],
  79                                 3 + ($rackData['height'] - $unit_no) * 2,
  80                                 $offset[$locidx] + $rtwidth[$locidx] - 1,
  81                                 3 + ($rackData['height'] - $unit_no) * 2 + 1,
  82                                 colorFromHex ($img, $color[$colorcode])
  83                         );
  84                 }
  85         }
  86         header("Content-type: image/png");
  87         imagepng ($img);
  88         imagedestroy ($img);
  89 }
  90
  91 ?>