<?php
class imageTransform {
var $image;
var $target;
var $size;
var $debug = false; // Show errors
var $quality = 100; // Result image quality
var $cache = false; // Cache disabled
var $expire = 172800; // Cache expiration time in seconds
var $enlarge = true; // Enlarge image if width or height needed is bigger than original
var $data = array(); // Image data array
var $forceType = false; // Force image type create
var $allowed = array( // Valid image formats
1 => 'gif',
2 => 'jpg',
3 => 'png'
);
/**
* function debug (string $message)
*
* Print the error messages
*/
function debug ($message) {
if ($this->debug) {
$debug = debug_backtrace();
rsort($debug);
echo $message;
foreach ($debug as $k => $v) {
echo "\n\n".'<br /><br />'.str_repeat(' ', (2 + $k * 2)).'FILE: '.$v['file'];
echo "\n".'<br />'.str_repeat(' ', (2 + $k * 2)).'LINE: '.$v['line'];
}
echo "\n".'<br />';
}
return false;
}
/**
* function enlarge (boolean $value)
*
* When you resize or crop an image, you need the width and height
* You can disable enlarge an image if the original size is lower than
* the needed width and height
*/
function enlarge ($value) {
$this->enlarge = $value;
}
/**
* function forceType (integer $type)
*
* Force to generate the new image with a concrete type
*
* (1 => GIF, 2 => JPEG, 3 => PNG)
*/
function forceType ($type) {
$this->forceType = $type;
}
/**
* function itsImage (string $image)
*
* Check if it's a valid image
*
* return false:array
*/
function itsImage ($image) {
if ($data = @getImageSize($image)) {
return empty($this->allowed[$data[2]])?false:$data;
} else {
return false;
}
}
/**
* function cache (string $value)
*
* Enable/disable the image cache
* To enable cache, needs the folder cache path
*/
function cache ($value) {
if ($value === false) {
$this->cache = false;
} elseif (($value === true) && (empty($this->cache) || ($this->cache === true) || ($this->cache === false))) {
$this->cache = false;
$this->debug('The cache folder haven\'t a valid path: '.$this->cache);
} elseif (!is_dir($value) || !is_writable($value)) {
$this->cache = false;
$this->debug('The cache folder isn\'t writable to me: '.$value);
} else {
$this->cache = preg_match('#/$#', $value)?$value:($value.'/');
}
}
/**
* function inlineHeaders (string $name)
*
* Print the inline headers to view function
*/
function inlineHeaders ($name) {
header('Content-type: image/'.$this->allowed[$this->data[2]]);
header('Content-Disposition: inline; filename="'.$name.'"');
}
/**
* function view (string $mode, string $param, boolean $cache = true)
*
* View online an resize/crop image. The image result can be cached.
*/
function view ($mode, $image, $param,$target = null) {
if (!($this->data = $this->itsImage($image))) {
return $this->debug($image.' isn\'t a valid image');
}
$name = explode('/', $image);
$name = end($name);
$ext = explode('.', $name);
$ext = strtolower(end($ext));
if (($mode == 'resize') || ($mode == 'crop')) {
list($width, $height) = explode('x', $param);
$width = intval($width);
$height = intval($height);
if (($width <= 0) || ($height <= 0)) {
return $this->debug('No size valid: '.$width.'x'.$height);
}
if ((($this->enlarge == false) && ($this->data[0] <= $width) && ($this->data[1] <= $height))
|| (($this->data[0] == $width) && ($this->data[1] == $height))) {
$this->inlineHeaders($name);
echo file_get_contents($image);
return true;
}
}
$this->inlineHeaders($name);
switch($mode) {
case 'gray':
$ok = $this->gray($image, $target, true);
break;
case 'rotate':
$ok = $this->rotate($image, $param, $target, true);
break;
case 'resize':
case 'crop':
$ok = $this->$mode($image, $width, $height, $target, true);
break;
case 'flip':
case 'flop':
$ok = $this->flipflop($image, $mode, $target, true);
break;
default:
return $this->debug($mode.' isn\'t a valid mode');
}
if ($target == false) {
return $ok;
} elseif ($ok == true) {
echo file_get_contents($target);
} else {
return false;
}
}
/**
* function defineTarget (string $thumb, boolean $view)
*
* Assign a valid value to target image
*
* return boolean
*/
function defineTarget ($thumb, $view) {
if ($view) {
$this->target = $thumb ? $thumb : false;
} elseif (empty($thumb)) {
if (!is_writable($this->image)) {
return $this->debug('The original image haven\'t write permissions to me: '.$this->image);
}
$this->target = $this->image;
} else {
$this->target = $thumb;
$folder = (dirname($this->target) == '') ? './' : dirname($this->target);
if (!$this->recursive_path($folder) || !is_writable($folder)) {
return $this->debug('Can\'t write in the target folder: '.$folder);
}
}
return true;
}
/**
* function gray (string $image, string $thumb = '', string $view = false)
*
* Transform an image to grayscale
*
* If the parameter $thumb it's set, instead transform the image image,
* create a new with the location in set.
*
* $view condition is used in the online image view funcion
*
* return boolean
*/
function gray ($image, $thumb = '', $view = false) {
if (!($this->data = $this->itsImage($image))) {
return $this->debug($image.' isn\'t a valid image');
}
$this->image = $image;
$this->defineTarget($thumb, $view);
$thumb = $this->imageDefine();
$quality = true;
if ($quality) {
// More slower but best quality
for ($c = 0; $c < 256; $c++) {
$palette[$c] = imageColorAllocate($thumb, $c, $c, $c);
}
for ($x = 0; $x < $this->data[0]; $x++) {
for ($y = 0; $y < $this->data[1]; $y++) {
$gray = (ImageColorAt($thumb, $x, $y) >> 8) & 0xFF;
$rgb = imagecolorat($thumb, $x, $y);
$r = ($rgb >> 16) & 0xFF;
$g = ($rgb >> 8) & 0xFF;
$b = $rgb & 0xFF;
$gs = ($r * 0.299) + ($g * 0.587) + ($b * 0.114);
imagesetpixel($thumb, $x, $y, $palette[$gs]);
}
}
} else {
// More faster but less quality
for ($x = 0; $x < $this->data[0]; $x++) {
for ($y = 0; $y < $this->data[1]; $y++) {
$gray = (ImageColorAt($thumb, $x, $y) >> 8) & 0xFF;
imagesetpixel($thumb, $x, $y, imageColorAllocate($thumb, $gray,$gray,$gray));
}
}
}
if ($this->imageCreate($thumb)) {
return true;
} else {
return $this->debug('A problem occours creating the image. I can\'t finish the task.');
}
}
/**
* function resize (string $image, integer $width, integer $height, string $thumb = '', boolean $view = false)
*
* This function resize an image maintaining the image proportions.
*
* If the parameter $thumb it's set, instead transform the image image,
* create a new with the location in set.
*
* $whith and $height set the max sizes allowed to width and height, not set the
* sizes in the result image, the result sizes are calculated with this values.
*
* $view condition is used in the online image view funcion
*
* return boolean
*/
function resize ($image, $width, $height, $thumb = '', $view = false) {
if (!($this->data = $this->itsImage($image))) {
return $this->debug($image.' isn\'t a valid image');
}
if ((($this->enlarge == false) && ($this->data[0] <= $width) && ($this->data[1] <= $height))
|| (($this->data[0] == $width) && ($this->data[1] == $height))) {
if (($thumb != '') && ($image != $thumb)) {
if ($this->defineTarget($thumb, false)) {
@copy($image, $thumb);
} else {
return false;
}
}
return true;
}
$this->image = $image;
$this->size = array($width, $height);
$this->defineTarget($thumb, $view);
return $this->_mainTransform();
}
/**
* function flip (string $image, string $mode, string $thumb = '', boolean $view = false)
*
* This function create and vertical flip or horizontal flop image.
*
* If the parameter $thumb it's set, instead transform the image image,
* create a new with the location in set.
*
* $view condition is used in the online image view funcion
*
* return boolean
*/
function flipflop ($image, $mode, $thumb = '', $view = false) {
if (!($this->data = $this->itsImage($image))) {
return $this->debug($image.' isn\'t a valid image');
}
$this->image = $image;
$this->defineTarget($thumb, $view);
$newImage = $this->imageDefine();
$w = $this->data[0];
$h = $this->data[1];
$thumb = $this->transparency($newImage, imageCreateTrueColor($w, $h));
if ($mode == 'flip') {
for ($x = 0; $x < $w; $x++) {
//imagecopy($thumb, $newImage, $x, 0, $w - $x - 1, 0, 1, $h); // Little more slow
imagecopy($thumb, $newImage, $w - $x - 1, 0, $x, 0, 1, $h);
}
} elseif ($mode == 'flop') {
for ($x = 0; $x < $h; $x++) {
//imagecopy($thumb, $newImage, 0, $x, 0, $h - $x - 1, $w, 1); // Little more slow
imagecopy($thumb, $newImage, 0, $h - $x - 1, 0, $x, $w, 1);
}
} else {
for ($x = 0; $x < $w; $x++) {
imagecopy($thumb, $newImage, $w - $x - 1, 0, $x, 0, 1, $h);
}
$buffer = $this->transparency($newImage, imageCreateTrueColor($w, 1));
for ($y = 0; $y < ($h / 2); $y++) {
imagecopy($buffer, $thumb, 0, 0, 0, $h - $y - 1, $w, 1);
imagecopy($thumb, $thumb, 0, $h - $y - 1, 0, $y, $w, 1);
imagecopy($thumb, $buffer, 0, $y, 0, 0, $w, 1);
}
imagedestroy($buffer);
}
if ($this->imageCreate($thumb)) {
return true;
} else {
return $this->debug('A problem occours creating the image. I can\'t finish the task.');
}
}
/**
* function quality (string $image, integer $quality, string $thumb = '', boolean = boolean)
*
* Create or change one image with different quality
*
* return boolean
*/
function quality ($image, $quality, $thumb = '', $view = false) {
if (!($this->data = $this->itsImage($image))) {
return $this->debug($image.' isn\'t a valid image');
}
$this->image = $image;
$this->defineTarget($thumb, $view);
$newImage = $this->imageDefine();
$thumb = $this->transparency($newImage, imageCreateTrueColor($this->data[0], $this->data[1]));
imagecopy($thumb, $newImage, 0, 0, 0, 0, $this->data[0], $this->data[1]);
$old_quality = $this->quality;
$this->quality = intval($quality);
if ($this->forceType !== false) {
$this->data[2] = $this->forceType;
}
$ok = $this->imageCreate($thumb);
$this->quality = $old_quality;
if ($ok) {
return true;
} else {
return $this->debug('A problem occours creating the image. I can\'t finish the task.');
}
}
/**
* function crop (string $image, integer $width, integer $height, string $thumb = '', boolean $view = false)
*
* Cut the image with the desired size. First the image is reduced or enlarged and after it's crop.
*
* If the parameter $thumb it's set, instead transform the image image,
* create a new with the location in set.
*
* $view condition is used in the online image view funcion
*
* return boolean
*/
function crop ($image, $width, $height, $thumb = '', $view = false) {
if (!($this->data = $this->itsImage($image))) {
return $this->debug($image.' isn\'t a valid image');
}
if ((($this->enlarge == false) && ($this->data[0] <= $width) && ($this->data[1] <= $height))
|| (($this->data[0] == $width) && ($this->data[1] == $height))) {
if (($thumb != '') && ($image != $thumb)) {
if ($this->defineTarget($thumb, false)) {
@copy($image, $thumb);
} else {
return false;
}
}
return true;
}
$this->image = $image;
$this->size = array($width, $height);
$this->defineTarget($thumb, $view);
if ($width == $height) {
$less = ($this->data[0] > $this->data[1]) ? $this->data[1] : $this->data[0];
$width = $height = $less;
$posX = intval(($this->data[0] / 2) - ($less / 2));
$posY = intval(($this->data[1] / 2) - ($less / 2));
} elseif ($width > $height) {
list($height, $width, $posX, $posY) = $this->cropSize($this->data[1], $this->data[0], $height, $width);
if ($posY < 0) {
list($width, $height, $posY, $posX) = $this->cropSize($this->data[0], $this->data[1], $this->size[0], $this->size[1]);
}
} elseif ($width < $height) {
list($width, $height, $posY, $posX) = $this->cropSize($this->data[0], $this->data[1], $width, $height);
if ($posX < 0) {
list($height, $width, $posX, $posY) = $this->cropSize($this->data[1], $this->data[0], $this->size[1], $this->size[0]);
}
}
return $this->_mainTransform($posX, $posY, $width, $height, false);
}
/**
* function cropSize (integer $sourceX, integer $sourceY, integer $targetX, integer $targetY)
*
* Calculate the size and coords to the crop action
*
* return array
*/
function cropSize ($sourceX, $sourceY, $targetX, $targetY) {
$sizeX = round(($sourceX * $targetX) / (($sourceX * $targetY) / $sourceY));
$sizeY = $sourceY;
$coordX = 0;
$coordY = intval(($sourceX / 2) - ($sizeX / 2));
return array($sizeX, $sizeY, $coordX, $coordY);
}
/**
* function rotate (string $image, integer $degrees, string $thumb = '', boolean $view = false)
*
* Rotate an image
*
* return boolean
*/
function rotate ($image, $degrees, $thumb = '', $view = false) {
if (!($this->data = $this->itsImage($image))) {
return $this->debug($image.' isn\'t a valid image');
}
$this->image = $image;
$this->defineTarget($thumb, $view);
$newImage = $this->imageDefine();
if (function_exists('imagerotate')) {
$thumb = $this->transparency($newImage, imagerotate($newImage, $degrees, 0));
} else {
$src_x = imagesx($newImage);
$src_y = imagesy($newImage);
if ($degrees == 180) {
$dest_x = $src_x;
$dest_y = $src_y;
} elseif ($src_x <= $src_y) {
$dest_x = $src_y;
$dest_y = $src_x;
} elseif ($src_x >= $src_y) {
$dest_x = $src_y;
$dest_y = $src_x;
}
$thumb = $this->transparency($newImage, imageCreateTrueColor($dest_x, $dest_y));
imagealphablending($thumb, false);
switch ($degrees) {
case 270:
for ($y = 0; $y < ($src_y); $y++) {
for ($x = 0; $x < ($src_x); $x++) {
$color = imagecolorat($newImage, $x, $y);
imagesetpixel($thumb, $dest_x - $y - 1, $x, $color);
}
}
break;
case 90:
for ($y = 0; $y < ($src_y); $y++) {
for ($x = 0; $x < ($src_x); $x++) {
$color = imagecolorat($newImage, $x, $y);
imagesetpixel($thumb, $y, $dest_y - $x - 1, $color);
}
}
break;
case 180:
for ($y = 0; $y < ($src_y); $y++) {
for ($x = 0; $x < ($src_x); $x++) {
$color = imagecolorat($newImage, $x, $y);
imagesetpixel($thumb, $dest_x - $x - 1, $dest_y - $y - 1, $color);
}
}
break;
default:
$thumb = $newImage;
}
}
if ($this->imageCreate($thumb)) {
return true;
} else {
return $this->debug('A problem occours creating the image. I can\'t finish the task.');
}
}
/**
* function _mainTransform (integer $posX=0, integer $posY=0, integer $width=0, integer $height=0, boolean $proportions = true)
*
* Process the image transform
*
* return boolean
*/
function _mainTransform ($posX=0, $posY=0, $width=0, $height=0, $proportions = true) {
$newImage = $this->imageDefine();
if (!$newImage) {
return $this->debug($this->image.' isn\'t JPG, GIF nor PGN');
}
if ($proportions) {
list($dX, $dY) = $this->proportions($this->data[0], $this->data[1]);
list($width, $height) = array($this->data[0], $this->data[1]);
} else {
list($dX, $dY) = array($this->size[0], $this->size[1]);
}
list($posX, $posY) = $this->maxSize($posX, $posY, $width, $height);
$thumb = $this->transparency($newImage, imageCreateTrueColor($dX, $dY));
imageCopyResampled($thumb, $newImage, 0, 0, $posX, $posY, $dX, $dY, $width, $height);
if ($this->imageCreate($thumb)) {
return true;
} else {
return $this->debug('A problem occours creating the image. I can\'t finish the task.');
}
}
/**
* function imageDefine (void)
*
* Check the image format and create a new image with the same format
*
* return resource
*/
function imageDefine () {
switch ($this->data[2]) {
case 1:
return imageCreateFromGIF($this->image);
case 2:
return imageCreateFromJPEG($this->image);
case 3:
return imageCreateFromPNG($this->image);
default:
return false;
}
}
/**
* function imageCreate (resource $thumb)
*
* Create a new image from the $thumb resource
*
* return booelan
*/
function imageCreate ($thumb) {
if ($this->data[2] == 1) {
$ok = imageGIF($thumb, $this->target, $this->quality);
} elseif ($this->data[2] == 3) {
$quality = 10 - round($this->quality / 10);
$quality = (($quality < 0)?0:(($quality > 9)?9:$quality));
$ok = imagepng($thumb, $this->target, $quality);
} else {
$ok = imageJPEG($thumb, $this->target, $this->quality);
}
if ($ok) {
imageDestroy($thumb);
return true;
} else {
return false;
}
}
/**
* function transparency (resource $original, resource $new)
*
* Check and aply the transparency to an image
*
* return resource
*/
function transparency ($original, $new) {
if (($this->data[2] !== 1) && ($this->data[2] !== 3)) {
return $new;
}
$trans_index = imagecolortransparent($original);
if ($trans_index >= 0) {
$trans_color = imagecolorsforindex($original, $trans_index);
$trans_index = imagecolorallocate($new, $trans_index['red'], $trans_index['green'], $trans_index['blue']);
imagefill($new, 0, 0, $trans_index);
imagecolortransparent($new, $trans_index);
} else if ($this->data[2] === 3) {
imagealphablending($new, false);
$colorTransparent = imagecolorallocatealpha($new, 0, 0, 0, 127);
imagefill($new, 0, 0, $colorTransparent);
imagesavealpha($new, true);
}
return $new;
}
/**
* function proportions (integer $width, integer $height)
*
* Calculate the image proportions to a scalable image
*
* return array
*/
function proportions ($width, $height) {
if ($width > $height) {
$n_width = $this->size[0];
$n_height = round(($n_width * $height) / $width);
} elseif ($height > $width) {
$n_height = $this->size[1];
$n_width = round(($n_height * $width) / $height);
} elseif ($this->size[0] > $this->size[1]) {
$n_width = $this->size[1];
$n_height = $this->size[1];
} else {
$n_width = $this->size[0];
$n_height = $this->size[0];
}
if ($n_width > $this->size[0]) {
$n_width = $this->size[0];
$n_height = round(($n_width * $height) / $width);
}
if ($n_height > $this->size[1]) {
$n_height = $this->size[1];
$n_width = round(($n_height * $width) / $height);
}
return array($n_width,$n_height);
}
/**
* function maxSize (integer $posX, integer $posY, integer $width, integer $height)
*
* Calculate the image position from the image area
*
* return array
*/
function maxSize ($posX, $posY, $width, $height) {
$posX = (($posX + $width) > $this->data[0])?($this->data[0] - $width):$posX;
$posX = ($posX < 0)?0:$posX;
$posY = (($posY + $height) > $this->data[1])?($this->data[1] - $height):$posY;
$posY = ($posY < 0)?0:$posY;
return array($posX,$posY);
}
/**
* function recursive_path (string $target)
*
* Create a recursive folder
*
* return boolean
*/
function recursive_path ($target) {
if (is_dir($target)) {
return true;
}
$dirs = explode('/', $target);
$dir = '';
foreach ($dirs as $part) {
if (empty($part) || ($part == '.')) {
continue;
}
$dir .= '/'.$part;
if (($part == '..') || is_dir($dir)) {
continue;
} else if (!@mkdir($dir, 0755)) {
return $this->debug('Can\'t write in the target folder: '.$dir);
}
}
clearstatcache();
return is_dir($target);
}
}
?>