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emblem_generator.php
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/
emblem_generator.php
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<?php
class EmblemGenerator {
private $_valid_symbols = null;
private $_valid_borders = null;
private $_valid_backgrounds = null;
private $_valid_colors = array(
array(158,11,15), array(237,28,36), array(255,70,70), array(255,102,0),
array(255,186,0), array(255,245,118), array(159,220,71), array(89,255,152),
array(75,134,9), array(0,108,33), array(60,186,146), array(0,115,106),
array(1,255,255), array(0,174,239), array(0,84,165), array(0,0,190),
array(133,95,168), array(145,39,143), array(143,35,244), array(237,0,140),
array(158,0,92), array(48,0,74), array(149,149,149), array(85,85,85),
array(140,98,58), array(90,56,17), array(172,66,0), array(255,146,187),
array(128,89,113), array(58,66,52), array(255,255,255), array(0,0,0)
);
public function getValidSymbols() { return $this->_valid_symbols; }
public function getValidBorders() { return $this->_valid_borders; }
public function getValidBackgrounds() { return $this->_valid_backgrounds; }
public function getValidColors() { return $this->_valid_colors; }
// -----------------------------------------------------------------------------------------------------------------
/**
*
*/
function __construct()
{
$this->_valid_symbols = array_merge(range(234, 350), range(1, 33));
$this->_valid_borders = range(34, 133);
$this->_valid_backgrounds = range(134, 233);
}
// -----------------------------------------------------------------------------------------------------------------
/**
* @return null
*/
private function _sanitizeSymbol()
{
if(isset($_GET["logo"])) {
$symbol = $_GET["logo"];
if(in_array($symbol, $this->_valid_symbols)) {
return $symbol;
}
}
return null;
}
// -----------------------------------------------------------------------------------------------------------------
/**
* @return null
*/
private function _sanitizeBorder()
{
if(isset($_GET["border"])) {
$border = $_GET["border"];
if(in_array($border, $this->_valid_borders)) {
return $border;
}
}
return null;
}
// -----------------------------------------------------------------------------------------------------------------
/**
* @param $color
* @return null
*/
private function _sanitizeColor($color)
{
if(isset($_GET["{$color}r"]) && isset($_GET["{$color}g"]) && isset($_GET["{$color}b"])) {
$rgb = array(
$_GET["{$color}r"],
$_GET["{$color}g"],
$_GET["{$color}b"]
);
if(in_array($rgb, $this->_valid_colors)) {
return $rgb;
}
}
return null;
}
// -----------------------------------------------------------------------------------------------------------------
/**
* @param $cache_file
* @return bool
*/
private function _printCachedEmblem($cache_file)
{
if(file_exists($cache_file)) {
$fp = fopen($cache_file, "rb");
header('Content-Type: image/png');
fpassthru($fp);
fclose($fp);
return true;
}
return false;
}
// -----------------------------------------------------------------------------------------------------------------
/**
* @param $symbol
* @param $border
* @param $background
* @param $symbol_color
* @param $border_color
* @param $background_color
*/
private function _generateEmblem($symbol, $border, $background, $symbol_color, $border_color, $background_color)
{
$cache_file = "cache/guildlogo_{$symbol}_{$border}" .
"_{$symbol_color[0]}_{$symbol_color[1]}_{$symbol_color[2]}" .
"_{$border_color[0]}_{$border_color[1]}_{$border_color[2]}" .
"_{$background_color[0]}_{$background_color[1]}_{$background_color[2]}" .
".png";
if(!$this->_printCachedEmblem($cache_file)) {
/* load the png files */
$symbol_image = imagecreatefrompng("img/emblems_big/{$symbol}.png");
$border_image = imagecreatefrompng("img/emblems_big/{$border}.png");
$background_image = imagecreatefrompng("img/emblems_big/{$background}.png");
/* colorize */
imagealphablending($symbol_image, false);
imagealphablending($border_image, false);
imagealphablending($background_image, true);
imagefilter($symbol_image, IMG_FILTER_COLORIZE, $symbol_color[0] - 255, $symbol_color[1] - 255, $symbol_color[2] - 255);
imagefilter($border_image, IMG_FILTER_COLORIZE, $border_color[0] - 255, $border_color[1] - 255, $border_color[2] - 255);
imagefilter($background_image, IMG_FILTER_COLORIZE, $background_color[0] - 255, $background_color[1] - 255, $background_color[2] - 255);
/* merge the images */
imagecopy($background_image, $border_image, 0, 0, 0, 0, 128, 128);
imagecopy($background_image, $symbol_image, 0, 0, 0, 0, 128, 128);
imagesavealpha($background_image, true);
/* output and cache */
header('Content-Type: image/png');
imagepng($background_image);
imagepng($background_image, $cache_file);
/* cleanup */
imagedestroy($background_image);
imagedestroy($border_image);
imagedestroy($symbol_image);
}
}
// -----------------------------------------------------------------------------------------------------------------
/**
*
*/
public function printEmblem()
{
$symbol = $this->_sanitizeSymbol();
$border = $this->_sanitizeBorder();
$symbol_color = $this->_sanitizeColor("l");
$border_color = $this->_sanitizeColor("r");
$background_color = $this->_sanitizeColor("b");
if(isset($symbol) && isset($border) && isset($symbol_color) && isset($border_color) && isset($background_color)) {
$background = $border + 100;
$this->_generateEmblem($symbol, $border, $background, $symbol_color, $border_color, $background_color);
}
else {
http_response_code(404);
}
}
}