}
if (count($options) > 3) {
unset($options[0]);
unset($options[1]);
unset($options[2]);
$characterString = implode($options);
$defaultOptions['customCharacterSet'] = $characterString;
}
$img->setAsciiOptions($defaultOptions);
}
$dpr = get(array('ppi', 'dpr', 'device-pixel-ratio'), 1);
verbose("dpr = {$dpr}");
$convolve = get('convolve', null);
$convolutionConstant = getConfig('convolution_constant', array());
if ($convolve && isset($convolutionConstant)) {
$img->addConvolveExpressions($convolutionConstant);
verbose("convolve constant = " . print_r($convolutionConstant, 1));
}
verbose("convolve = " . print_r($convolve, 1));
$upscale = getDefined(array('no-upscale', 'nu'), false, true);
verbose("upscale = {$upscale}");
$postProcessing = getConfig('postprocessing', array('png_filter' => false, 'png_filter_cmd' => '/usr/local/bin/optipng -q', 'png_deflate' => false, 'png_deflate_cmd' => '/usr/local/bin/pngout -q', 'jpeg_optimize' => false, 'jpeg_optimize_cmd' => '/usr/local/bin/jpegtran -copy none -optimize'));
$alias = get('alias', null);
$aliasPath = getConfig('alias_path', null);
$validAliasname = getConfig('valid_aliasname', '#^[a-z0-9A-Z-_]+$#');
$aliasTarget = null;
if ($alias && $aliasPath && $passwordMatch) {
$aliasTarget = $aliasPath . $alias;
$useCache = false;
is_writable($aliasPath) or errorPage("Directory for alias is not writable.", 403);
preg_match($validAliasname, $alias) or errorPage('Filename for alias contains invalid characters. Do not add extension.', 404);
