Digole OLED12864 PNG2BIN (Start Screen Format)

<?php

//*************************************************
//Digole OLED12864 PNG2BIN
//Programmer: Gregory Michalik
//Email: gregory954(a)gmail.com
//**************************************************
//Takes IMG.png and outputs output.bin to be sent to
//the OLED12864 as the start screen.
//("SSS",0x00,0x04,Sendfile(output.bin))
//IMG.png must be 128x64 and Black/White.
//**************************************************

$im = imagecreatefrompng("IMG.png");
$a=fopen("output.bin","w");
for($y=0;$y<64;$y=$y+8){
for($x=0;$x<128;$x++){
$data="";
for($y2=$y;$y2<$y+8;$y2++){if(imagecolorat($im,$x,$y2)==0){$data.="0";}else{$data.="1";}}
fputs($a,pack('H*', str_pad(base_convert($data, 2, 16), 2, "0", STR_PAD_LEFT)));
}}
fclose($a);
?>