<?php



error_reporting(E_ALL ^ E_NOTICE);



/**

* Serves out required icon in the required color and border

**/



$step = 50;



$iconDirectoryPath = "images/icons/";

$existingFill = hex2int("00ff00");

$existingDarkBorder = hex2int("474747");

$existingLightBorder = hex2int("B4B4B4");

$fill = hex2int("53E26E");

$lightBorder = hex2int("B4B4B4");

$darkBorder = hex2int("474747");

$themeName = "";

$layerName = "";

$iconName = "proto.png";



if($_GET["theme"] != "") {

	$iconName = $_GET["theme"] . ".png";

}

elseif($_GET["layer"] != "") {

	$iconName = $_GET["layer"] . ".png";

}

elseif($_GET["icon"] != "") {

	$iconName = $_GET["icon"] . ".png";

}



if(! file_exists($iconDirectoryPath . $iconName)) {

	$iconName = "proto.png";

}



if($_GET["fill"] != "") {

	$fill = hex2int($_GET["fill"]);

}



// Compute the dark and light shades

/*$darkBorder['r'] = $fill['r'] - $step;

if($darkBorderBorder['r'] < 0){

	$darkBorder['r'] = 0;

}

$darkBorder['g'] = $fill['g'] - $step;

if($darkBorderBorder['g'] < 0){

	$darkBorder['g'] = 0;

}

$darkBorder['b'] = $fill['b'] - $step;

if($darkBorderBorder['b'] < 0){

	$darkBorder['b'] = 0;

}*/



$lightBorder['r'] = $fill['r'] + $step;

if($lightBorder['r'] > 255){

	$lightBorder['r'] = 255;

}



$lightBorder['g'] = $fill['g'] + $step;

if($lightBorder['g'] > 255){

	$lightBorder['g'] = 255;

}



$lightBorder['b'] = $fill['b'] + $step;

if($lightBorder['b'] > 255){

	$lightBorder['b'] = 255;

}



// For now, all borders are dark

//$lightBorder = "000000";

$darkBorder = "000000";





$image = imageCreateFromPNG($iconDirectoryPath . $iconName);

$phpFillIndex = imageColorClosest($image,$existingFill['r'],$existingFill['g'],$existingFill['b']);

imageColorSet($image,$phpFillIndex,$fill['r'],$fill['g'],$fill['b']);

$phpDarkBorderIndex = imageColorClosest($image,$existingDarkBorder['r'],$existingDarkBorder['g'],$existingDarkBorder['b']);

imageColorSet($image,$phpDarkBorderIndex,$darkBorder['r'],$darkBorder['g'],$darkBorder['b']);

$phpLightBorderIndex = imageColorClosest($image,$existingLightBorder['r'],$existingLightBorder['g'],$existingLightBorder['b']);

imageColorSet($image,$phpLightBorderIndex,$lightBorder['r'],$lightBorder['g'],$lightBorder['b']);



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

imagePNG($image);

imageDestroy($image);





/**

 * @param    $hex string        6-digit hexadecimal color

 * @return    array            3 elements 'r', 'g', & 'b' = int color values

 * @desc Converts a 6 digit hexadecimal number into an array of

 *       3 integer values ('r'  => red value, 'g'  => green, 'b'  => blue)

 */

function hex2int($hex) {

        return array( 'r' => hexdec(substr($hex, 0, 2)), // 1st pair of digits

                      'g' => hexdec(substr($hex, 2, 2)), // 2nd pair

                      'b' => hexdec(substr($hex, 4, 2))  // 3rd pair

                    );

}



/**

 * @param $input string     6-digit hexadecimal string to be validated

 * @param $default string   default color to be returned if $input isn't valid

 * @return string           the validated 6-digit hexadecimal color

 * @desc returns $input if it is a valid hexadecimal color, 

 *       otherwise returns $default (which defaults to black)

 */

function validHexColor($input = '000000', $default = '000000') {

    // A valid Hexadecimal color is exactly 6 characters long

    // and eigher a digit or letter from a to f

    return (eregi('^[0-9a-f]{6}$', $input)) ? $input : $default ;

}

?>