quickmap.php

<?php
    require_once("dbconnect.php");
    $resolution=GetValue( "resolution", 2, 128, 8 );
    $height = GetValue( "size", 256, 4096, 1024 );
    $min = 5500 - ($height/$resolution/2);
    $max = $min + ($height/$resolution);
    $low = $min*256;
    $high = $max*256;
    $result = mysqli_query($link, "select regionName,cast(locX/256 as unsigned),cast(locY/256 as unsigned),serverURI from regions where locX >= $low and locY >= $low and locX <= $high and locY <= $high order by RegionName" );
    if (!$result) exit;
    $lines = mysqli_num_rows( $result );

    $out = imagecreate( $height, $height );
    $black = imagecolorallocate( $out, 0, 32, 32 );
    $ocean = imagecolorallocate( $out, 0, 0, 128 );
    $plaza = imagecolorallocate( $out, 0, 255, 0 );
    $region = imagecolorallocate( $out, 0, 128, 0 );
    imagefilledrectangle( $out, 0, 0, $height, $height, $black );
    for ($x = 0; $x < $height; $x += $resolution )
        for ($y = 0; $y < $height; $y += $resolution )
        {
            $x2 = $x + $resolution - 2;
            $y2 = $y + $resolution - 2;
            $gridx = $min + ($x / $resolution);
            $gridy = $min + ($y / $resolution);
            imagefilledrectangle( $out, $x, $y, $x2, $y2, $ocean );
        }

    for ($i = 0; $i < $lines; ++$i)
    {
        list( $RegionName, $x, $y, $host ) = mysqli_fetch_row( $result );

        $thecolor = preg_match( "/plaza\d+\.osgrid\.org\:/", $host ) ? $plaza : $region;
        $x1 = ($x - $min) * $resolution;
        $y1 = $height - (($y - $min) * $resolution);
        $x2 = $x1 + $resolution - 2;
        $y2 = $y1 + $resolution - 2;
        imagefilledrectangle( $out, $x1, $y1, $x2, $y2, $thecolor );
    }
    header( "Content-type: image/png" );
    imagepng( $out );
    imagedestroy( $out );


    function GetValue( $varname, $min, $max, $default )
    {
        $result = $default;
        if (isset($_GET[$varname])) $result = $_GET[$varname];
        if ($result < $min) $result=$min;
        $result = (($result-($j=pow(2,((int)(log($result)/log(2))))))?$j<<1:$j); // increase non-power-of-2 to next biggest power of 2
        return ($result>$max) ? $max : $result;
    }
?>