<?php
    header("Content-Type: image/png");

    $size = isset($_GET['w']) && is_numeric($_GET['w']) && $_GET['w'] <= 1600  && $_GET['w'] >= 8 ? $_GET['w'] : 100;
    $helm = isset($_GET['h']) && $_GET['h'] == 1 ? true : false;

    // only used when h=1
    $inset = $size / 18;
    $scaled = $size * 8 / 9;

    if(isset($_GET['n'])){
        $url = "http://s3.amazonaws.com/MinecraftSkins/".$_GET['n'].".png";
    } else {
        $url = "http://s3.amazonaws.com/MinecraftSkins/char.png";
    }

    if(getimagesize($url)){
        $image = imagecreatefrompng($url);
        $output = imagecreatetruecolor($size, $size);

        if($helm){
            $output_image = imagecopyresampled($output, $image, $inset, $inset, 8, 8, $scaled, $scaled, 8, 8);
            $output_image_helm = imagecopyresampled($output, $image, 0, 0, 40, 8, $size, $size, 8, 8);
        } else {
            $output_image = imagecopyresampled($output, $image, 0, 0, 8, 8, $size, $size, 8, 8);
        }
    } else {
        $image = imagecreatefrompng("http://s3.amazonaws.com/MinecraftSkins/char.png");
        $output = imagecreatetruecolor($size, $size);

        // Steve has no helm, but make sure the faces are scaled to the same size for custom and non-custom
        // skins when helms are enabled
        if($helm){
            $output_image = imagecopyresampled($output, $image, $inset, $inset, 8, 8, $scaled, $scaled, 8, 8);
        } else {
            $output_image = imagecopyresampled($output, $image, 0, 0, 8, 8, $size, $size, 8, 8);
        }
    }

    imagepng($output);
?>