mbk-lab
/
nextcloud
2
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

OC_Image: change static vars to object vars

This commit is contained in:
Bart Visscher 2012-02-09 22:44:26 +01:00
parent b4d84bd9bb
commit 8684e847b0
1 changed files with 100 additions and 115 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

215
lib/image.php
View File

@ -44,34 +44,24 @@ function ellipsis($str, $maxlen) {
*
*/
class OC_Image {
static private $resource = false; // tmp resource.
static private $destroy = false; // if the resource is created withing the object.
static private $imagetype = IMAGETYPE_PNG; // Default to png if file type isn't evident.
static private $filepath = null;
protected $resource = false; // tmp resource.
protected $imagetype = IMAGETYPE_PNG; // Default to png if file type isn't evident.
protected $filepath = null;
/**
* @brief Constructor.
* @param $imageref The path to a local file, a base64 encoded string or a resource created by an imagecreate* function.
* If a resource is passed it is the job of the caller to destroy it using imagedestroy($var)
* @returns bool False on error
*/
function __construct($imageref = null) {
//OC_Log::write('core','OC_Image::__construct, start', OC_Log::DEBUG);
public function __construct($imageref = null) {
//OC_Log::write('core',__METHOD__.'(): start', OC_Log::DEBUG);
if(!extension_loaded('gd') || !function_exists('gd_info')) {
//if(!function_exists('imagecreatefromjpeg')) {
OC_Log::write('core','OC_Image::__construct, GD module not installed', OC_Log::ERROR);
OC_Log::write('core',__METHOD__.'(): GD module not installed', OC_Log::ERROR);
return false;
}
if(!is_null($imageref)) {
self::load($imageref);
}
}
/**
* @brief Destructor.
*/
function __destruct() {
if(is_resource(self::$resource) && self::$destroy) {
imagedestroy(self::$resource); // Why does this issue a warning.
$this->load($imageref);
}
}
@ -80,8 +70,7 @@ class OC_Image {
* @returns bool
*/
public function valid() { // apparently you can't name a method 'empty'...
$ret = is_resource(self::$resource);
return $ret;
return is_resource($this->resource);
}
/**
@ -89,7 +78,7 @@ class OC_Image {
* @returns int
*/
public function mimeType() {
return is_resource(self::$resource) ? image_type_to_mime_type(self::$imagetype) : '';
return is_resource($this->resource) ? image_type_to_mime_type($this->imagetype) : '';
}
/**
@ -97,7 +86,7 @@ class OC_Image {
* @returns int
*/
public function width() {
return is_resource(self::$resource) ? imagesx(self::$resource) : -1;
return is_resource($this->resource) ? imagesx($this->resource) : -1;
}
/**
@ -105,7 +94,7 @@ class OC_Image {
* @returns int
*/
public function height() {
return is_resource(self::$resource) ? imagesy(self::$resource) : -1;
return is_resource($this->resource) ? imagesy($this->resource) : -1;
}
/**
@ -122,8 +111,8 @@ class OC_Image {
*/
public function save($filepath=null) {
if($filepath === null && self::$filepath === null) {
OC_Log::write('core','OC_Image::save. save() called with no path.', OC_Log::ERROR);
if($filepath === null && $this->filepath === null) {
OC_Log::write('core',__METHOD__.'(): called with no path.', OC_Log::ERROR);
return false;
} elseif($filepath === null && $this->filepath !== null) {
$filepath = $this->filepath;
@ -136,14 +125,14 @@ class OC_Image {
*/
private function _output($filepath=null, $really=false) {
if($really === false) {
header('Content-Type: '.self::mimeType());
header('Content-Type: '.$this->mimeType());
$filepath = null; // Just being cautious ;-)
} else {
if(!is_writable(dirname($filepath))) {
OC_Log::write('core','OC_Image::_output. Directory \''.dirname($filepath).'\' is not writable.', OC_Log::ERROR);
OC_Log::write('core',__METHOD__.'(): Directory \''.dirname($filepath).'\' is not writable.', OC_Log::ERROR);
return false;
} elseif(is_writable(dirname($filepath)) && file_exists($filepath) && !is_writable($filepath)) {
OC_Log::write('core','OC_Image::_output. File \''.$filepath.'\' is not writable.', OC_Log::ERROR);
OC_Log::write('core',__METHOD__.'(): File \''.$filepath.'\' is not writable.', OC_Log::ERROR);
return false;
}
}
@ -152,25 +141,25 @@ class OC_Image {
}
$retval = false;
switch(self::$imagetype) {
switch($this->imagetype) {
case IMAGETYPE_GIF:
$retval = imagegif(self::$resource, $filepath);
$retval = imagegif($this->resource, $filepath);
break;
case IMAGETYPE_JPEG:
$retval = imagejpeg(self::$resource, $filepath);
$retval = imagejpeg($this->resource, $filepath);
break;
case IMAGETYPE_PNG:
$retval = imagepng(self::$resource, $filepath);
$retval = imagepng($this->resource, $filepath);
break;
case IMAGETYPE_XBM:
$retval = imagexbm(self::$resource, $filepath);
$retval = imagexbm($this->resource, $filepath);
break;
case IMAGETYPE_WBMP:
case IMAGETYPE_BMP:
$retval = imagewbmp(self::$resource, $filepath);
$retval = imagewbmp($this->resource, $filepath);
break;
default:
$retval = imagepng(self::$resource, $filepath);
$retval = imagepng($this->resource, $filepath);
}
return $retval;
}
@ -179,14 +168,14 @@ class OC_Image {
* @brief Prints the image when called as $image().
*/
public function __invoke() {
return self::show();
return $this->show();
}
/**
* @returns Returns the image resource in any.
*/
public function resource() {
return self::$resource;
return $this->resource;
}
/**
@ -194,9 +183,9 @@ class OC_Image {
*/
function __toString() {
ob_start();
$res = imagepng(self::$resource);
$res = imagepng($this->resource);
if (!$res) {
OC_Log::write('core','OC_Image::_string. Error writing image',OC_Log::ERROR);
OC_Log::write('core','OC_Image->__toString. Error writing image',OC_Log::ERROR);
}
return base64_encode(ob_get_clean());
}
@ -208,18 +197,18 @@ class OC_Image {
*/
public function fixOrientation() {
if(!is_callable('exif_read_data')){
OC_Log::write('core','OC_Image::fixOrientation() Exif module not enabled.', OC_Log::DEBUG);
OC_Log::write('core','OC_Image->fixOrientation() Exif module not enabled.', OC_Log::DEBUG);
return false;
}
if(!is_resource(self::$resource)) {
OC_Log::write('core','OC_Image::fixOrientation() No image loaded.', OC_Log::DEBUG);
if(!is_resource($this->resource)) {
OC_Log::write('core','OC_Image->fixOrientation() No image loaded.', OC_Log::DEBUG);
return false;
}
if(is_null(self::$filepath) || !is_readable(self::$filepath)) {
OC_Log::write('core','OC_Image::fixOrientation() No readable file path set.', OC_Log::DEBUG);
if(is_null($this->filepath) || !is_readable($this->filepath)) {
OC_Log::write('core','OC_Image->fixOrientation() No readable file path set.', OC_Log::DEBUG);
return false;
}
$exif = exif_read_data(self::$filepath, 'IFD0');
$exif = exif_read_data($this->filepath, 'IFD0');
if(!$exif) {
return false;
}
@ -227,7 +216,7 @@ class OC_Image {
return true; // Nothing to fix
}
$o = $exif['Orientation'];
OC_Log::write('core','OC_Image::fixOrientation() Orientation: '.$o, OC_Log::DEBUG);
OC_Log::write('core','OC_Image->fixOrientation() Orientation: '.$o, OC_Log::DEBUG);
$rotate = 0;
$flip = false;
switch($o) {
@ -266,22 +255,22 @@ class OC_Image {
break;
}
if($rotate) {
$res = imagerotate(self::$resource, $rotate, -1);
$res = imagerotate($this->resource, $rotate, -1);
if($res) {
if(imagealphablending($res, true)) {
if(imagesavealpha($res, true)) {
self::$resource = $res;
$this->resource = $res;
return true;
} else {
OC_Log::write('core','OC_Image::fixOrientation() Error during alphasaving.', OC_Log::DEBUG);
OC_Log::write('core','OC_Image->fixOrientation() Error during alphasaving.', OC_Log::DEBUG);
return false;
}
} else {
OC_Log::write('core','OC_Image::fixOrientation() Error during alphablending.', OC_Log::DEBUG);
OC_Log::write('core','OC_Image->fixOrientation() Error during alphablending.', OC_Log::DEBUG);
return false;
}
} else {
OC_Log::write('core','OC_Image::fixOrientation() Error during oriention fixing.', OC_Log::DEBUG);
OC_Log::write('core','OC_Image->fixOrientation() Error during oriention fixing.', OC_Log::DEBUG);
return false;
}
}
@ -290,20 +279,19 @@ class OC_Image {
/**
* @brief Loads an image from a local file, a base64 encoded string or a resource created by an imagecreate* function.
* @param $imageref The path to a local file, a base64 encoded string or a resource created by an imagecreate* function.
* If a resource is passed it is the job of the caller to destroy it using imagedestroy($var)
* @returns An image resource or false on error
*/
public function load($imageref) {
if(self::loadFromFile($imageref) !== false) {
return self::$resource;
} elseif(self::loadFromBase64($imageref) !== false) {
return self::$resource;
} elseif(self::loadFromData($imageref) !== false) {
return self::$resource;
} elseif(self::loadFromResource($imageref) !== false) {
return self::$resource;
if($this->loadFromFile($imageref) !== false) {
return $this->resource;
} elseif($this->loadFromBase64($imageref) !== false) {
return $this->resource;
} elseif($this->loadFromData($imageref) !== false) {
return $this->resource;
} elseif($this->loadFromResource($imageref) !== false) {
return $this->resource;
} else {
OC_Log::write('core','OC_Image::load, couldn\'t load anything. Giving up!', OC_Log::DEBUG);
OC_Log::write('core',__METHOD__.'(): couldn\'t load anything. Giving up!', OC_Log::DEBUG);
return false;
}
}
@ -316,45 +304,45 @@ class OC_Image {
public function loadFromFile($imagepath=false) {
if(!is_file($imagepath) || !file_exists($imagepath) || !is_readable($imagepath)) {
// Debug output disabled because this method is tried before loadFromBase64?
OC_Log::write('core','OC_Image::loadFromFile, couldn\'t load: '.ellipsis($imagepath, 50), OC_Log::DEBUG);
OC_Log::write('core','OC_Image->loadFromFile, couldn\'t load: '.ellipsis($imagepath, 50), OC_Log::DEBUG);
return false;
}
$itype = exif_imagetype($imagepath);
switch($itype) {
case IMAGETYPE_GIF:
if (imagetypes() & IMG_GIF) {
self::$resource = imagecreatefromgif($imagepath);
$this->resource = imagecreatefromgif($imagepath);
} else {
OC_Log::write('core','OC_Image::loadFromFile, GIF images not supported: '.$imagepath, OC_Log::DEBUG);
OC_Log::write('core','OC_Image->loadFromFile, GIF images not supported: '.$imagepath, OC_Log::DEBUG);
}
break;
case IMAGETYPE_JPEG:
if (imagetypes() & IMG_JPG) {
self::$resource = imagecreatefromjpeg($imagepath);
$this->resource = imagecreatefromjpeg($imagepath);
} else {
OC_Log::write('core','OC_Image::loadFromFile, JPG images not supported: '.$imagepath, OC_Log::DEBUG);
OC_Log::write('core','OC_Image->loadFromFile, JPG images not supported: '.$imagepath, OC_Log::DEBUG);
}
break;
case IMAGETYPE_PNG:
if (imagetypes() & IMG_PNG) {
self::$resource = imagecreatefrompng($imagepath);
$this->resource = imagecreatefrompng($imagepath);
} else {
OC_Log::write('core','OC_Image::loadFromFile, PNG images not supported: '.$imagepath, OC_Log::DEBUG);
OC_Log::write('core','OC_Image->loadFromFile, PNG images not supported: '.$imagepath, OC_Log::DEBUG);
}
break;
case IMAGETYPE_XBM:
if (imagetypes() & IMG_XPM) {
self::$resource = imagecreatefromxbm($imagepath);
$this->resource = imagecreatefromxbm($imagepath);
} else {
OC_Log::write('core','OC_Image::loadFromFile, XBM/XPM images not supported: '.$imagepath, OC_Log::DEBUG);
OC_Log::write('core','OC_Image->loadFromFile, XBM/XPM images not supported: '.$imagepath, OC_Log::DEBUG);
}
break;
case IMAGETYPE_WBMP:
case IMAGETYPE_BMP:
if (imagetypes() & IMG_WBMP) {
self::$resource = imagecreatefromwbmp($imagepath);
$this->resource = imagecreatefromwbmp($imagepath);
} else {
OC_Log::write('core','OC_Image::loadFromFile, (W)BMP images not supported: '.$imagepath, OC_Log::DEBUG);
OC_Log::write('core','OC_Image->loadFromFile, (W)BMP images not supported: '.$imagepath, OC_Log::DEBUG);
}
break;
/*
@ -382,17 +370,16 @@ class OC_Image {
break;
*/
default:
self::$resource = imagecreatefromstring(file_get_contents($imagepath));
$this->resource = imagecreatefromstring(file_get_contents($imagepath));
$itype = IMAGETYPE_PNG;
OC_Log::write('core','OC_Image::loadFromFile, Default', OC_Log::DEBUG);
OC_Log::write('core','OC_Image->loadFromFile, Default', OC_Log::DEBUG);
break;
}
if($this->valid()) {
self::$imagetype = $itype;
self::$filepath = $imagepath;
self::$destroy = true;
$this->imagetype = $itype;
$this->filepath = $imagepath;
}
return self::$resource;
return $this->resource;
}
/**
@ -404,13 +391,12 @@ class OC_Image {
if(is_resource($str)) {
return false;
}
self::$resource = imagecreatefromstring($str);
if(!self::$resource) {
OC_Log::write('core','OC_Image::loadFromData, couldn\'t load', OC_Log::DEBUG);
$this->resource = imagecreatefromstring($str);
if(!$this->resource) {
OC_Log::write('core','OC_Image->loadFromData, couldn\'t load', OC_Log::DEBUG);
return false;
}
self::$destroy = true;
return self::$resource;
return $this->resource;
}
/**
@ -424,20 +410,19 @@ class OC_Image {
}
$data = base64_decode($str);
if($data) { // try to load from string data
self::$resource = imagecreatefromstring($data);
if(!self::$resource) {
OC_Log::write('core','OC_Image::loadFromBase64, couldn\'t load', OC_Log::DEBUG);
$this->resource = imagecreatefromstring($data);
if(!$this->resource) {
OC_Log::write('core','OC_Image->loadFromBase64, couldn\'t load', OC_Log::DEBUG);
return false;
}
self::$destroy = true;
return self::$resource;
return $this->resource;
} else {
return false;
}
}
/**
* @brief Checks if image resource is valid and assigns it to self::$resource.
* @brief Checks if image resource is valid and assigns it to $this->resource.
* @param $res An image resource.
* @returns An image resource or false on error
*/
@ -445,7 +430,7 @@ class OC_Image {
if(!is_resource($res)) {
return false;
}
self::$resource = $res;
$this->resource = $res;
}
/**
@ -454,12 +439,12 @@ class OC_Image {
* @returns bool
*/
public function resize($maxsize) {
if(!self::$resource) {
OC_Log::write('core','OC_Image::resize, No image loaded', OC_Log::ERROR);
if(!$this->resource) {
OC_Log::write('core',__METHOD__.'(): No image loaded', OC_Log::ERROR);
return false;
}
$width_orig=imageSX(self::$resource);
$height_orig=imageSY(self::$resource);
$width_orig=imageSX($this->resource);
$height_orig=imageSY($this->resource);
$ratio_orig = $width_orig/$height_orig;
if ($ratio_orig > 1) {
@ -472,18 +457,18 @@ class OC_Image {
$process = imagecreatetruecolor(round($new_width), round($new_height));
if ($process == false) {
OC_Log::write('core','OC_Image::resize. Error creating true color image',OC_Log::ERROR);
OC_Log::write('core',__METHOD__.'(): Error creating true color image',OC_Log::ERROR);
imagedestroy($process);
return false;
}
imagecopyresampled($process, self::$resource, 0, 0, 0, 0, $new_width, $new_height, $width_orig, $height_orig);
imagecopyresampled($process, $this->resource, 0, 0, 0, 0, $new_width, $new_height, $width_orig, $height_orig);
if ($process == false) {
OC_Log::write('core','OC_Image::resize. Error resampling process image '.$new_width.'x'.$new_height,OC_Log::ERROR);
OC_Log::write('core',__METHOD__.'(): Error resampling process image '.$new_width.'x'.$new_height,OC_Log::ERROR);
imagedestroy($process);
return false;
}
self::$resource = $process;
$this->resource = $process;
return true;
}
@ -492,12 +477,12 @@ class OC_Image {
* @returns bool for success or failure
*/
public function centerCrop() {
if(!self::$resource) {
OC_Log::write('core','OC_Image::centerCrop, No image loaded', OC_Log::ERROR);
if(!$this->resource) {
OC_Log::write('core','OC_Image->centerCrop, No image loaded', OC_Log::ERROR);
return false;
}
$width_orig=imageSX(self::$resource);
$height_orig=imageSY(self::$resource);
$width_orig=imageSX($this->resource);
$height_orig=imageSY($this->resource);
if($width_orig === $height_orig) {
return true;
}
@ -513,17 +498,17 @@ class OC_Image {
}
$process = imagecreatetruecolor($width, $height);
if ($process == false) {
OC_Log::write('core','OC_Image::centerCrop. Error creating true color image',OC_Log::ERROR);
OC_Log::write('core','OC_Image->centerCrop. Error creating true color image',OC_Log::ERROR);
imagedestroy($process);
return false;
}
imagecopyresampled($process, self::$resource, 0, 0, $x, $y, $width, $height, $width, $height);
imagecopyresampled($process, $this->resource, 0, 0, $x, $y, $width, $height, $width, $height);
if ($process == false) {
OC_Log::write('core','OC_Image::centerCrop. Error resampling process image '.$width.'x'.$height,OC_Log::ERROR);
OC_Log::write('core','OC_Image->centerCrop. Error resampling process image '.$width.'x'.$height,OC_Log::ERROR);
imagedestroy($process);
return false;
}
self::$resource = $process;
$this->resource = $process;
return true;
}
@ -536,26 +521,26 @@ class OC_Image {
* @returns bool for success or failure
*/
public function crop($x, $y, $w, $h) {
if(!self::$resource) {
OC_Log::write('core','OC_Image::crop, No image loaded', OC_Log::ERROR);
if(!$this->resource) {
OC_Log::write('core',__METHOD__.'(): No image loaded', OC_Log::ERROR);
return false;
}
$width_orig=imageSX(self::$resource);
$height_orig=imageSY(self::$resource);
//OC_Log::write('core','OC_Image::crop. Original size: '.$width_orig.'x'.$height_orig, OC_Log::DEBUG);
$width_orig=imageSX($this->resource);
$height_orig=imageSY($this->resource);
//OC_Log::write('core',__METHOD__.'(): Original size: '.$width_orig.'x'.$height_orig, OC_Log::DEBUG);
$process = imagecreatetruecolor($w, $h);
if ($process == false) {
OC_Log::write('core','OC_Image::crop. Error creating true color image',OC_Log::ERROR);
OC_Log::write('core',__METHOD__.'(): Error creating true color image',OC_Log::ERROR);
imagedestroy($process);
return false;
}
imagecopyresampled($process, self::$resource, 0, 0, $x, $y, $w, $h, $w, $h);
imagecopyresampled($process, $this->resource, 0, 0, $x, $y, $w, $h, $w, $h);
if ($process == false) {
OC_Log::write('core','OC_Image::crop. Error resampling process image '.$w.'x'.$h,OC_Log::ERROR);
OC_Log::write('core',__METHOD__.'(): Error resampling process image '.$w.'x'.$h,OC_Log::ERROR);
imagedestroy($process);
return false;
}
self::$resource = $process;
$this->resource = $process;
return true;
}
}