Файл: fckeditor/ckfinder/core/connector/php/php4/Utils/Misc.php
Строк: 205
<?php
/*
* CKFinder
* ========
* http://www.ckfinder.com
* Copyright (C) 2007-2008 Frederico Caldeira Knabben (FredCK.com)
*
* The software, this file and its contents are subject to the CKFinder
* License. Please read the license.txt file before using, installing, copying,
* modifying or distribute this file or part of its contents. The contents of
* this file is part of the Source Code of CKFinder.
*/
/**
* @package CKFinder
* @subpackage Utils
* @copyright Frederico Caldeira Knabben
*/
/**
* @package CKFinder
* @subpackage Utils
* @copyright Frederico Caldeira Knabben
*/
class CKFinder_Connector_Utils_Misc
{
/**
* Convert any value to boolean, strings like "false", "FalSE" and "off" are also considered as false
*
* @static
* @access public
* @param mixed $value
* @return boolean
*/
function booleanValue($value)
{
if (strcasecmp("false", $value) == 0 || strcasecmp("off", $value) == 0 || !$value) {
return false;
} else {
return true;
}
}
/**
* @link http://pl.php.net/manual/en/function.imagecopyresampled.php
* replacement to imagecopyresampled that will deliver results that are almost identical except MUCH faster (very typically 30 times faster)
*
* @static
* @access public
* @param string $dst_image
* @param string $src_image
* @param int $dst_x
* @param int $dst_y
* @param int $src_x
* @param int $src_y
* @param int $dst_w
* @param int $dst_h
* @param int $src_w
* @param int $src_h
* @param int $quality
* @return boolean
*/
function fastImageCopyResampled (&$dst_image, $src_image, $dst_x, $dst_y, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h, $quality = 3)
{
if (empty($src_image) || empty($dst_image)) {
return false;
}
if ($quality <= 1) {
$temp = imagecreatetruecolor ($dst_w + 1, $dst_h + 1);
imagecopyresized ($temp, $src_image, $dst_x, $dst_y, $src_x, $src_y, $dst_w + 1, $dst_h + 1, $src_w, $src_h);
imagecopyresized ($dst_image, $temp, 0, 0, 0, 0, $dst_w, $dst_h, $dst_w, $dst_h);
imagedestroy ($temp);
} elseif ($quality < 5 && (($dst_w * $quality) < $src_w || ($dst_h * $quality) < $src_h)) {
$tmp_w = $dst_w * $quality;
$tmp_h = $dst_h * $quality;
$temp = imagecreatetruecolor ($tmp_w + 1, $tmp_h + 1);
imagecopyresized ($temp, $src_image, 0, 0, $src_x, $src_y, $tmp_w + 1, $tmp_h + 1, $src_w, $src_h);
imagecopyresampled ($dst_image, $temp, $dst_x, $dst_y, 0, 0, $dst_w, $dst_h, $tmp_w, $tmp_h);
imagedestroy ($temp);
} else {
imagecopyresampled ($dst_image, $src_image, $dst_x, $dst_y, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h);
}
return true;
}
/**
* @link http://pl.php.net/manual/pl/function.imagecreatefromjpeg.php
* function posted by e dot a dot schultz at gmail dot com
*
* @static
* @access public
* @param string $filename
* @return boolean
*/
function setMemoryForImage($imageWidth, $imageHeight, $imageBits, $imageChannels)
{
$MB = 1048576; // number of bytes in 1M
$K64 = 65536; // number of bytes in 64K
$TWEAKFACTOR = 2.4; // Or whatever works for you
$memoryNeeded = round( ( $imageWidth * $imageHeight
* $imageBits
* $imageChannels / 8
+ $K64
) * $TWEAKFACTOR
) + 3*$MB;
//ini_get('memory_limit') only works if compiled with "--enable-memory-limit" also
//Default memory limit is 8MB so well stick with that.
//To find out what yours is, view your php.ini file.
$memoryLimit = CKFinder_Connector_Utils_Misc::returnBytes(@ini_get('memory_limit'))/$MB;
if (!$memoryLimit) {
$memoryLimit = 8;
}
$memoryLimitMB = $memoryLimit * $MB;
if (function_exists('memory_get_usage')) {
if (memory_get_usage() + $memoryNeeded > $memoryLimitMB) {
$newLimit = $memoryLimit + ceil( ( memory_get_usage()
+ $memoryNeeded
- $memoryLimitMB
) / $MB
);
if (@ini_set( 'memory_limit', $newLimit . 'M' ) === false) {
return false;
}
}
} else {
if ($memoryNeeded + 3*$MB > $memoryLimitMB) {
$newLimit = $memoryLimit + ceil(( 3*$MB
+ $memoryNeeded
- $memoryLimitMB
) / $MB
);
if (false === @ini_set( 'memory_limit', $newLimit . 'M' )) {
return false;
}
}
}
return true;
}
/**
* convert shorthand php.ini notation into bytes, much like how the PHP source does it
* @link http://pl.php.net/manual/en/function.ini-get.php
*
* @static
* @access public
* @param string $val
* @return int
*/
function returnBytes($val)
{
$val = trim($val);
if (!$val) {
return 0;
}
$last = strtolower($val[strlen($val)-1]);
switch($last) {
// The 'G' modifier is available since PHP 5.1.0
case 'g':
$val *= 1024;
case 'm':
$val *= 1024;
case 'k':
$val *= 1024;
}
return $val;
}
/**
* Checks if a value exists in an array (case insensitive)
*
* @static
* @access public
* @param string $needle
* @param array $haystack
* @return boolean
*/
function inArrayCaseInsensitive($needle, $haystack)
{
if (!$haystack || !is_array($haystack)) {
return false;
}
$lcase = array();
foreach ($haystack as $key => $val) {
$lcase[$key] = strtolower($val);
}
return in_array($needle, $lcase);
}
/**
* Source: http://pl.php.net/imagecreate
* (optimized for speed and memory usage, but yet not very efficient)
*
* @static
* @access public
* @param string $filename
* @return resource
*/
function imageCreateFromBmp($filename)
{
//20 seconds seems to be a reasonable value to not kill a server and process images up to 1680x1050
@set_time_limit(20);
if (false === ($f1 = fopen($filename, "rb"))) {
return false;
}
$FILE = unpack("vfile_type/Vfile_size/Vreserved/Vbitmap_offset", fread($f1, 14));
if ($FILE['file_type'] != 19778) {
return false;
}
$BMP = unpack('Vheader_size/Vwidth/Vheight/vplanes/vbits_per_pixel'.
'/Vcompression/Vsize_bitmap/Vhoriz_resolution'.
'/Vvert_resolution/Vcolors_used/Vcolors_important', fread($f1, 40));
$BMP['colors'] = pow(2,$BMP['bits_per_pixel']);
if ($BMP['size_bitmap'] == 0) {
$BMP['size_bitmap'] = $FILE['file_size'] - $FILE['bitmap_offset'];
}
$BMP['bytes_per_pixel'] = $BMP['bits_per_pixel']/8;
$BMP['bytes_per_pixel2'] = ceil($BMP['bytes_per_pixel']);
$BMP['decal'] = ($BMP['width']*$BMP['bytes_per_pixel']/4);
$BMP['decal'] -= floor($BMP['width']*$BMP['bytes_per_pixel']/4);
$BMP['decal'] = 4-(4*$BMP['decal']);
if ($BMP['decal'] == 4) {
$BMP['decal'] = 0;
}
$PALETTE = array();
if ($BMP['colors'] < 16777216) {
$PALETTE = unpack('V'.$BMP['colors'], fread($f1, $BMP['colors']*4));
}
//2048x1536px@24bit don't even try to process larger files as it will probably fail
if ($BMP['size_bitmap'] > 3 * 2048 * 1536) {
return false;
}
$IMG = fread($f1, $BMP['size_bitmap']);
fclose($f1);
$VIDE = chr(0);
$res = imagecreatetruecolor($BMP['width'],$BMP['height']);
$P = 0;
$Y = $BMP['height']-1;
$line_length = $BMP['bytes_per_pixel']*$BMP['width'];
if ($BMP['bits_per_pixel'] == 24) {
while ($Y >= 0)
{
$X=0;
$temp = unpack( "C*", substr($IMG, $P, $line_length));
while ($X < $BMP['width'])
{
$offset = $X*3;
imagesetpixel($res, $X++, $Y, ($temp[$offset+3] << 16) + ($temp[$offset+2] << 8) + $temp[$offset+1]);
}
$Y--;
$P += $line_length + $BMP['decal'];
}
}
elseif ($BMP['bits_per_pixel'] == 8)
{
while ($Y >= 0)
{
$X=0;
$temp = unpack( "C*", substr($IMG, $P, $line_length));
while ($X < $BMP['width'])
{
imagesetpixel($res, $X++, $Y, $PALETTE[$temp[$X] +1]);
}
$Y--;
$P += $line_length + $BMP['decal'];
}
}
elseif ($BMP['bits_per_pixel'] == 4)
{
while ($Y >= 0)
{
$X=0;
$i = 1;
$low = true;
$temp = unpack( "C*", substr($IMG, $P, $line_length));
while ($X < $BMP['width'])
{
if ($low) {
$index = $temp[$i] >> 4;
}
else {
$index = $temp[$i++] & 0x0F;
}
$low = !$low;
imagesetpixel($res, $X++, $Y, $PALETTE[$index +1]);
}
$Y--;
$P += $line_length + $BMP['decal'];
}
}
elseif ($BMP['bits_per_pixel'] == 1)
{
$COLOR = unpack("n",$VIDE.substr($IMG,floor($P),1));
if (($P*8)%8 == 0) $COLOR[1] = $COLOR[1] >>7;
elseif (($P*8)%8 == 1) $COLOR[1] = ($COLOR[1] & 0x40)>>6;
elseif (($P*8)%8 == 2) $COLOR[1] = ($COLOR[1] & 0x20)>>5;
elseif (($P*8)%8 == 3) $COLOR[1] = ($COLOR[1] & 0x10)>>4;
elseif (($P*8)%8 == 4) $COLOR[1] = ($COLOR[1] & 0x8)>>3;
elseif (($P*8)%8 == 5) $COLOR[1] = ($COLOR[1] & 0x4)>>2;
elseif (($P*8)%8 == 6) $COLOR[1] = ($COLOR[1] & 0x2)>>1;
elseif (($P*8)%8 == 7) $COLOR[1] = ($COLOR[1] & 0x1);
$COLOR[1] = $PALETTE[$COLOR[1]+1];
}
else {
return false;
}
return $res;
}
}
?>