/**
* Allocates memory (if required).
*
* @param int $bytesRequired
* @param int $extra in bytes
* @return bool|null true if enough memory, false if could not allocate, null if there is no way to know
*/
public static function allocateMemory($bytesRequired, $extra = 0x1000000)
{
$memoryLimit = \Ip\Internal\System\Helper\SystemInfo::getMemoryLimit();
if (!function_exists('memory_get_usage') && $memoryLimit !== '-1') {
//try to allocate as much as we can
ini_set('memory_limit', '100M');
ini_set('memory_limit', '150M');
ini_set('memory_limit', '200M');
ini_set('memory_limit', '500M');
return null;
// We can't calculate how much memory should be allocated
}
if ('-1' == $memoryLimit) {
// unlimited
return true;
}
$memoryRequired = memory_get_usage() + $bytesRequired;
if ($memoryRequired < $memoryLimit) {
return true;
}
$megabytesNeeded = ceil($memoryRequired + $extra / 0x100000) . 'M';
if (!ini_set('memory_limit', $megabytesNeeded)) {
ipLog()->warning('Could not allocate enough memory. Please increase memory limit to {memoryNeeded}', array('memoryNeeded' => $megabytesNeeded));
return false;
}
return true;
}
/**
* Takes memory required to process supplied image file and a bit more for future PHP operations.
* @param resource $imageFile
* @return bool true on success
*/
protected function getMemoryNeeded($imageFile)
{
if (!file_exists($imageFile)) {
return 0;
}
$imageInfo = getimagesize($imageFile);
if (!isset($imageInfo['channels']) || !$imageInfo['channels']) {
$imageInfo['channels'] = 4;
}
if (!isset($imageInfo['bits']) || !$imageInfo['bits']) {
$imageInfo['bits'] = 8;
}
if (!isset($imageInfo[0])) {
$imageInfo[0] = 1;
}
if (!isset($imageInfo[1])) {
$imageInfo[1] = 1;
}
$memoryNeeded = round(($imageInfo[0] * $imageInfo[1] * $imageInfo['bits'] * $imageInfo['channels'] / 8 + Pow(2, 16)) * 1.65);
$success = \Ip\Internal\System\Helper\SystemInfo::allocateMemory($memoryNeeded);
return $success;
}
public static function checkMemoryLimit()
{
if (\Ip\Internal\System\Helper\SystemInfo::getMemoryLimitAsMb() < 100 && \Ip\Internal\System\Helper\SystemInfo::getMemoryLimitAsMb() != -1) {
return 'warning';
}
return 'success';
}
/**
* @param $imageFile
* @return bool|null
*/
public static function getMemoryNeeded($imageFile)
{
$imageInfo = getimagesize($imageFile);
if (!isset($imageInfo['channels']) || !$imageInfo['channels']) {
$imageInfo['channels'] = 4;
}
if (!isset($imageInfo['bits']) || !$imageInfo['bits']) {
$imageInfo['bits'] = 8;
}
if (!isset($imageInfo[0])) {
$imageInfo[0] = 1;
}
if (!isset($imageInfo[1])) {
$imageInfo[1] = 1;
}
$a64kb = 65536;
$bytesNeeded = round(($imageInfo[0] * $imageInfo[1] * $imageInfo['bits'] * $imageInfo['channels'] / 8 + $a64kb) * 1.65);
return \Ip\Internal\System\Helper\SystemInfo::allocateMemory($bytesNeeded);
}
