OMGM Code

<?php
include "gm.php";

$zoom = $_GET["zoom"];
$tileX = $_GET["x"];
$tileY = $_GET["y"];

$value = Google_Tile_Factors( $zoom );
$tile = Google_Tile_Calc( $value, $tileY, $tileX ) ;

header ('Content-type: image/png');

$tileImage = "uploads/imagetiles/".$zoom."/x".$tileX."_y".$tileY.".png";

if( file_exists($tileImage) ){
$im = imagecreatefrompng($tileImage);
imagepng($im);
imagedestroy($im);
}
else{

$im = @imagecreatetruecolor(256, 256) or die('Cannot Initialize new GD image stream');

imagesavealpha($im, true);
$trans_colour = imagecolorallocatealpha($im, 0, 0, 0, 127);
imagefill($im, 0, 0, $trans_colour);
  
$text_color = imagecolorallocate($im, 233, 14, 91);

$strArr = array(
"X=".$tileX . ", Y=".$tileY.", ZOOM=".$zoom,
"latN: ".$tile["LATN"],
"lngW: ".$tile["LNGW"],
"latS: ".$tile["LATS"],
"lngE: ".$tile["LNGE"],
"pixN: ".$tile["PYN"],
"pixW: ".$tile["PXW"],
"pixS: ".$tile["PYS"],
"pixE: ".$tile["PXE"]
);

$y = 5;

foreach($strArr as $str){
  imagestring($im, 2, 5, $y, $str , $text_color);
  $y = $y+15;
}

imagerectangle($im, 0, 0, 255, 255, $text_color);

        
imagepng($im);
imagedestroy($im);
}

function output($str){
  global $outputImg;
    if(!$outputImg)
    echo $str."\n";
}
function outputObj($obj){
  global $outputImg;
  if(!$outputImg)
    print_r($obj);
}

function drawRoute($im, $color, $polygon){  
  imagepolygon  ( $im  , $polygon , count($polygon) / 2 , $color  );
}

/*
function createPolygon($zoom, $pointsLngLat, $top, $left){
  $points = array();
  foreach($pointsLngLat as $pointLngLat){
        $point = Google_RelPix($pointLngLat[1], $pointLngLat[0], $zoom);
        
        $x = $point[0] - $top;
        $y = $point[1] - $left;        
        
        // swap axes
        $points[] = $y;
        $points[] = $x;
  }
  return $points;
}
*/

function insideImage($tile, $bbox){
    $inside = true;    
    
    if( $bbox["minLng"] > $tile["LNGE"] || $bbox["maxLng"] < $tile["LNGW"] || 
        $bbox["maxLat"] < $tile["LATS"] || $bbox["minLat"] > $tile["LATN"]){
        $inside = false;
    }    
    
    return $inside;
}

function parseToPoints($routeStr, $zoom, $top, $left){
  $parts = split(":", $routeStr);
  
  $pointsLngLat = array();
  
  $polygon = array();
  
  $minLat = 90;
  $maxLat = -90;
  $minLng = 180;
  $maxLng = -180;
  
  foreach($parts as $part){
    $parsed = split(",", $part);
    $lng = $parsed[1];
    $lat = $parsed[2];
    
      
    $pointsLngLat[] = array($lng, $lat);
    
    $point = Google_RelPix($lat, $lng, $zoom);
        
    $x = $point[0] - $top;
    $y = $point[1] - $left;        
        
    // swap axes
    $polygon[] = $y;
    $polygon[] = $x;
    
    if( $lat > $maxLat ) $maxLat = $lat;
    if( $lat < $minLat ) $minLat = $lat;
    
    if( $lng > $maxLng ) $maxLng = $lng;
    if( $lng < $minLng ) $minLng = $lng;
  }
  
  return array( array("minLat"=>$minLat,"maxLat"=>$maxLat,"minLng"=>$minLng,"maxLng"=>$maxLng), $pointsLngLat, $polygon);
}

function drawPoint($lat, $lng, $zoom, $top, $left, $im, $color){
  $point = Google_RelPix($lat, $lng, $zoom);
  
  imagestring($im, 2,10, 150, $point[0].",".$point[1] , $color);
  $x = $point[0] - $top;
  $y = $point[1] - $left;
  
  imagestring($im, 2,10, 165, $x.",".$y , $color);
  imagearc($im, $y, $x, 20, 20, 0, 360, $color);
}
?>