From ac68e908707f8d5ac8d5a967dea35a45b523c36e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ram=C5=ABnas=20Dronga?= <ieskok@ramuno.lt>
Date: Mon, 18 Apr 2016 21:25:38 +0300
Subject: [PATCH] Faster and ~70% smaller empty png tile

---
 tileserver.php | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/tileserver.php b/tileserver.php
index b2b929f..55a1f74 100644
--- a/tileserver.php
+++ b/tileserver.php
@@ -420,10 +420,8 @@ class Server {
       default:
         header('Access-Control-Allow-Origin: *');
         header('Content-type: image/png');
-        $a = '';
-        for($i=1; $i < 338; $i++){$a .= 'A';}
-        echo base64_decode('iVBORw0KGgoAAAANSUhEUgAAAQAAAAEACAYAAABccqhmAAABFUl'
-        . 'EQVR42u3BMQEAAADCoPVP7WsIo' . $a . 'eAMBPAAB2ClDBAAAAABJRU5ErkJggg');
+        // 256x256 transparent optimised png tile
+        echo hex2bin('89504e470d0a1a0a0000000d494844520000010000000100010300000066bc3a2500000003504c5445000000a77a3dda0000000174524e530040e6d8660000001f494441541819edc1010d000000c220fba77e0e37600000000000000000e70221000001f5a2bd040000000049454e44ae426082');
         break;
     }
     die;