--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/overlay.php	Sat Mar 08 20:43:35 2014 +0200
@@ -0,0 +1,92 @@
+<?php
+$cachepath = "cache/";
+$fontfile = "tools/lucon.ttf";
+$tilesize = 256;
+
+$vzoom = isset($_GET["zoom"]) ? intval($_GET["zoom"]) - 1 : 1;
+$zoom = pow(2, $vzoom - 5);
+$xc = intval($_GET["x"]);
+$yc = intval($_GET["y"]);
+
+
+
+$cachefile = $cachepath."bl_".$zoom."_".$xc."_".$yc.".png";
+$mtime = @filemtime($cachefile);
+if ($mtime !== FALSE && time() - $mtime < 7*24*60*60)
+{
+}
+
+
+$im = @imagecreate($tilesize, $tilesize);
+
+$transparent = imagecolorallocate($im,0,0,255);
+$alpha = imagecolorallocatealpha($im,0,0,0,64);
+$black = imagecolorallocate($im,0,0,0);
+imagecolortransparent($im,$transparent);
+$white = imagecolorallocate($im,255,255,255);
+
+imagefilledrectangle($im, 0,0, $tilesize,$tilesize, $transparent);
+
+$fontsize = array();
+$fontsize[ 8] = 7;
+$fontsize[16] = 13;
+$fontsize[32] = 26;
+
+$labelsize = array();
+$labelsize[ 4] = 7;
+$labelsize[ 8] = 8;
+$labelsize[16] = 9;
+$labelsize[32] = 12;
+
+
+function chkcoords($xoffs, $yoffs)
+{
+  global $xorig, $yorig, $tilesize;
+
+  return
+    $xoffs > $xorig - $tilesize && $xoffs < $xorig + ($tilesize*2) &&
+    $yoffs > $yorig - $tilesize && $yoffs < $yorig + ($tilesize*2);
+}
+
+$xorig = $xc * $tilesize;
+$yorig = $yc * $tilesize;
+
+
+$file = fopen("overlay.txt", "r");
+while ($data = fgetcsv($file, 160, ","))
+{
+  $xoffs = $data[0] * $zoom;
+  $yoffs = $data[1] * $zoom;
+  $char  = $data[2];
+  
+  if (chkcoords($xoffs, $yoffs))
+  {
+    if ($zoom>=8) imagefilledrectangle($im,$xoffs-$xorig,$yoffs-$yorig,$xoffs-$xorig+$zoom-1,$yoffs-$yorig+$zoom-1,$black);
+    if ($zoom>=8) imagettftext($im,$fontsize[$zoom],0,$xoffs-$xorig+$fontsize[$zoom]/4,$yoffs-$yorig+$fontsize[$zoom],$white,$fontfile,$char);
+    // imagechar($im,$fontsize[$zoom],$xoffs-$xorig,$yoffs-$yorig,$char,$white);      
+  }
+}
+fclose($file);
+
+
+$file = fopen("overlaylabels.txt", "r");
+while ($data = fgetcsv($file, 160, ","))
+{
+  $xoffs = $data[0] * $zoom;
+  $yoffs = $data[1] * $zoom;
+  $char  = $data[2];
+
+  if (chkcoords($xoffs, $yoffs) && $zoom >= 4)
+  {
+    $box = imagettfbbox($labelsize[$zoom], 0, $fontfile, $char);
+    imagefilledrectangle($im,$xoffs-$xorig+$box[6],$yoffs-$yorig+$box[7]+5,$xoffs-$xorig+$box[2],$yoffs-$yorig+$box[3]+5,$alpha);      
+    imagettftext($im,$labelsize[$zoom],0,$xoffs-$xorig,$yoffs-$yorig+5,$white,"./lucon.ttf",$char);
+    //imagestring($im,1,$xoffs-$xorig,$yoffs-$yorig,$char,$white);      
+  }
+}
+fclose($file);
+
+
+header("Content-type: image/png");
+imagepng($im);
+?>