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<?php
/**
* @copyright Copyright (c) 2016, ownCloud, Inc.
*
* @author Andreas Fischer <bantu@owncloud.com>
* @author Bart Visscher <bartv@thisnet.nl>
* @author Bartek Przybylski <bart.p.pl@gmail.com>
* @author Björn Schießle <bjoern@schiessle.org>
* @author Byron Marohn <combustible@live.com>
* @author Christopher Schäpers <kondou@ts.unde.re>
* @author Georg Ehrke <oc.list@georgehrke.com>
* @author j-ed <juergen@eisfair.org>
* @author Joas Schilling <coding@schilljs.com>
* @author Johannes Willnecker <johannes@willnecker.com>
* @author Julius Härtl <jus@bitgrid.net>
* @author Jörn Friedrich Dreyer <jfd@butonic.de>
* @author Lukas Reschke <lukas@statuscode.ch>
* @author Morris Jobke <hey@morrisjobke.de>
* @author Olivier Paroz <github@oparoz.com>
* @author Robin Appelman <robin@icewind.nl>
* @author Roeland Jago Douma <roeland@famdouma.nl>
* @author Thomas Müller <thomas.mueller@tmit.eu>
* @author Thomas Tanghus <thomas@tanghus.net>
* @author Victor Dubiniuk <dubiniuk@owncloud.com>
*
* @license AGPL-3.0
*
* This code is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License, version 3,
* along with this program. If not, see <http://www.gnu.org/licenses/>
*
*/
/**
* Class for basic image manipulation
*/
class OC_Image implements \OCP\IImage {
/** @var false|resource */
protected $resource = false; // tmp resource.
/** @var int */
protected $imageType = IMAGETYPE_PNG; // Default to png if file type isn't evident.
/** @var string */
protected $mimeType = 'image/png'; // Default to png
/** @var int */
protected $bitDepth = 24;
/** @var null|string */
protected $filePath = null;
/** @var finfo */
private $fileInfo;
/** @var \OCP\ILogger */
private $logger;
/** @var \OCP\IConfig */
private $config;
/** @var array */
private $exif;
/**
* Constructor.
*
* @param resource|string $imageRef The path to a local file, a base64 encoded string or a resource created by
* an imagecreate* function.
* @param \OCP\ILogger $logger
* @param \OCP\IConfig $config
*/
public function __construct($imageRef = null, \OCP\ILogger $logger = null, \OCP\IConfig $config = null) {
$this->logger = $logger;
if ($logger === null) {
$this->logger = \OC::$server->getLogger();
}
$this->config = $config;
if ($config === null) {
$this->config = \OC::$server->getConfig();
}
if (\OC_Util::fileInfoLoaded()) {
$this->fileInfo = new finfo(FILEINFO_MIME_TYPE);
}
if ($imageRef !== null) {
$this->load($imageRef);
}
}
/**
* Determine whether the object contains an image resource.
*
* @return bool
*/
public function valid() { // apparently you can't name a method 'empty'...
return is_resource($this->resource);
}
/**
* Returns the MIME type of the image or an empty string if no image is loaded.
*
* @return string
*/
public function mimeType() {
return $this->valid() ? $this->mimeType : '';
}
/**
* Returns the width of the image or -1 if no image is loaded.
*
* @return int
*/
public function width() {
return $this->valid() ? imagesx($this->resource) : -1;
}
/**
* Returns the height of the image or -1 if no image is loaded.
*
* @return int
*/
public function height() {
return $this->valid() ? imagesy($this->resource) : -1;
}
/**
* Returns the width when the image orientation is top-left.
*
* @return int
*/
public function widthTopLeft() {
$o = $this->getOrientation();
$this->logger->debug('OC_Image->widthTopLeft() Orientation: ' . $o, array('app' => 'core'));
switch ($o) {
case -1:
case 1:
case 2: // Not tested
case 3:
case 4: // Not tested
return $this->width();
case 5: // Not tested
case 6:
case 7: // Not tested
case 8:
return $this->height();
}
return $this->width();
}
/**
* Returns the height when the image orientation is top-left.
*
* @return int
*/
public function heightTopLeft() {
$o = $this->getOrientation();
$this->logger->debug('OC_Image->heightTopLeft() Orientation: ' . $o, array('app' => 'core'));
switch ($o) {
case -1:
case 1:
case 2: // Not tested
case 3:
case 4: // Not tested
return $this->height();
case 5: // Not tested
case 6:
case 7: // Not tested
case 8:
return $this->width();
}
return $this->height();
}
/**
* Outputs the image.
*
* @param string $mimeType
* @return bool
*/
public function show($mimeType = null) {
if ($mimeType === null) {
$mimeType = $this->mimeType();
}
header('Content-Type: ' . $mimeType);
return $this->_output(null, $mimeType);
}
/**
* Saves the image.
*
* @param string $filePath
* @param string $mimeType
* @return bool
*/
public function save($filePath = null, $mimeType = null) {
if ($mimeType === null) {
$mimeType = $this->mimeType();
}
if ($filePath === null) {
if ($this->filePath === null) {
$this->logger->error(__METHOD__ . '(): called with no path.', array('app' => 'core'));
return false;
} else {
$filePath = $this->filePath;
}
}
return $this->_output($filePath, $mimeType);
}
/**
* Outputs/saves the image.
*
* @param string $filePath
* @param string $mimeType
* @return bool
* @throws Exception
*/
private function _output($filePath = null, $mimeType = null) {
if ($filePath) {
if (!file_exists(dirname($filePath))) {
mkdir(dirname($filePath), 0777, true);
}
$isWritable = is_writable(dirname($filePath));
if (!$isWritable) {
$this->logger->error(__METHOD__ . '(): Directory \'' . dirname($filePath) . '\' is not writable.', array('app' => 'core'));
return false;
} elseif ($isWritable && file_exists($filePath) && !is_writable($filePath)) {
$this->logger->error(__METHOD__ . '(): File \'' . $filePath . '\' is not writable.', array('app' => 'core'));
return false;
}
}
if (!$this->valid()) {
return false;
}
$imageType = $this->imageType;
if ($mimeType !== null) {
switch ($mimeType) {
case 'image/gif':
$imageType = IMAGETYPE_GIF;
break;
case 'image/jpeg':
$imageType = IMAGETYPE_JPEG;
break;
case 'image/png':
$imageType = IMAGETYPE_PNG;
break;
case 'image/x-xbitmap':
$imageType = IMAGETYPE_XBM;
break;
case 'image/bmp':
case 'image/x-ms-bmp':
$imageType = IMAGETYPE_BMP;
break;
default:
throw new Exception('\OC_Image::_output(): "' . $mimeType . '" is not supported when forcing a specific output format');
}
}
switch ($imageType) {
case IMAGETYPE_GIF:
$retVal = imagegif($this->resource, $filePath);
break;
case IMAGETYPE_JPEG:
$retVal = imagejpeg($this->resource, $filePath, $this->getJpegQuality());
break;
case IMAGETYPE_PNG:
$retVal = imagepng($this->resource, $filePath);
break;
case IMAGETYPE_XBM:
if (function_exists('imagexbm')) {
$retVal = imagexbm($this->resource, $filePath);
} else {
throw new Exception('\OC_Image::_output(): imagexbm() is not supported.');
}
break;
case IMAGETYPE_WBMP:
$retVal = imagewbmp($this->resource, $filePath);
break;
case IMAGETYPE_BMP:
$retVal = imagebmp($this->resource, $filePath, $this->bitDepth);
break;
default:
$retVal = imagepng($this->resource, $filePath);
}
return $retVal;
}
/**
* Prints the image when called as $image().
*/
public function __invoke() {
return $this->show();
}
/**
* @return resource Returns the image resource in any.
*/
public function resource() {
return $this->resource;
}
/**
* @return string Returns the mimetype of the data. Returns the empty string
* if the data is not valid.
*/
public function dataMimeType() {
if (!$this->valid()) {
return '';
}
switch ($this->mimeType) {
case 'image/png':
case 'image/jpeg':
case 'image/gif':
return $this->mimeType;
default:
return 'image/png';
}
}
/**
* @return null|string Returns the raw image data.
*/
public function data() {
if (!$this->valid()) {
return null;
}
ob_start();
switch ($this->mimeType) {
case "image/png":
$res = imagepng($this->resource);
break;
case "image/jpeg":
$quality = $this->getJpegQuality();
if ($quality !== null) {
$res = imagejpeg($this->resource, null, $quality);
} else {
$res = imagejpeg($this->resource);
}
break;
case "image/gif":
$res = imagegif($this->resource);
break;
default:
$res = imagepng($this->resource);
$this->logger->info('OC_Image->data. Could not guess mime-type, defaulting to png', array('app' => 'core'));
break;
}
if (!$res) {
$this->logger->error('OC_Image->data. Error getting image data.', array('app' => 'core'));
}
return ob_get_clean();
}
/**
* @return string - base64 encoded, which is suitable for embedding in a VCard.
*/
public function __toString() {
return base64_encode($this->data());
}
/**
* @return int|null
*/
protected function getJpegQuality() {
$quality = $this->config->getAppValue('preview', 'jpeg_quality', 90);
if ($quality !== null) {
$quality = min(100, max(10, (int) $quality));
}
return $quality;
}
/**
* (I'm open for suggestions on better method name ;)
* Get the orientation based on EXIF data.
*
* @return int The orientation or -1 if no EXIF data is available.
*/
public function getOrientation() {
if ($this->exif !== null) {
return $this->exif['Orientation'];
}
if ($this->imageType !== IMAGETYPE_JPEG) {
$this->logger->debug('OC_Image->fixOrientation() Image is not a JPEG.', array('app' => 'core'));
return -1;
}
if (!is_callable('exif_read_data')) {
$this->logger->debug('OC_Image->fixOrientation() Exif module not enabled.', array('app' => 'core'));
return -1;
}
if (!$this->valid()) {
$this->logger->debug('OC_Image->fixOrientation() No image loaded.', array('app' => 'core'));
return -1;
}
if (is_null($this->filePath) || !is_readable($this->filePath)) {
$this->logger->debug('OC_Image->fixOrientation() No readable file path set.', array('app' => 'core'));
return -1;
}
$exif = @exif_read_data($this->filePath, 'IFD0');
if (!$exif) {
return -1;
}
if (!isset($exif['Orientation'])) {
return -1;
}
$this->exif = $exif;
return $exif['Orientation'];
}
public function readExif($data) {
if (!is_callable('exif_read_data')) {
$this->logger->debug('OC_Image->fixOrientation() Exif module not enabled.', array('app' => 'core'));
return;
}
if (!$this->valid()) {
$this->logger->debug('OC_Image->fixOrientation() No image loaded.', array('app' => 'core'));
return;
}
$exif = @exif_read_data('data://image/jpeg;base64,' . base64_encode($data));
if (!$exif) {
return;
}
if (!isset($exif['Orientation'])) {
return;
}
$this->exif = $exif;
}
/**
* (I'm open for suggestions on better method name ;)
* Fixes orientation based on EXIF data.
*
* @return bool
*/
public function fixOrientation() {
$o = $this->getOrientation();
$this->logger->debug('OC_Image->fixOrientation() Orientation: ' . $o, array('app' => 'core'));
$rotate = 0;
$flip = false;
switch ($o) {
case -1:
return false; //Nothing to fix
case 1:
$rotate = 0;
break;
case 2:
$rotate = 0;
$flip = true;
break;
case 3:
$rotate = 180;
break;
case 4:
$rotate = 180;
$flip = true;
break;
case 5:
$rotate = 90;
$flip = true;
break;
case 6:
$rotate = 270;
break;
case 7:
$rotate = 270;
$flip = true;
break;
case 8:
$rotate = 90;
break;
}
if($flip && function_exists('imageflip')) {
imageflip($this->resource, IMG_FLIP_HORIZONTAL);
}
if ($rotate) {
$res = imagerotate($this->resource, $rotate, 0);
if ($res) {
if (imagealphablending($res, true)) {
if (imagesavealpha($res, true)) {
imagedestroy($this->resource);
$this->resource = $res;
return true;
} else {
$this->logger->debug('OC_Image->fixOrientation() Error during alpha-saving', array('app' => 'core'));
return false;
}
} else {
$this->logger->debug('OC_Image->fixOrientation() Error during alpha-blending', array('app' => 'core'));
return false;
}
} else {
$this->logger->debug('OC_Image->fixOrientation() Error during orientation fixing', array('app' => 'core'));
return false;
}
}
return false;
}
/**
* Loads an image from a local file, a base64 encoded string or a resource created by an imagecreate* function.
*
* @param resource|string $imageRef The path to a local file, a base64 encoded string or a resource created by an imagecreate* function or a file resource (file handle ).
* @return resource|false An image resource or false on error
*/
public function load($imageRef) {
if (is_resource($imageRef)) {
if (get_resource_type($imageRef) === 'gd') {
$this->resource = $imageRef;
return $this->resource;
} elseif (in_array(get_resource_type($imageRef), array('file', 'stream'))) {
return $this->loadFromFileHandle($imageRef);
}
} elseif ($this->loadFromBase64($imageRef) !== false) {
return $this->resource;
} elseif ($this->loadFromFile($imageRef) !== false) {
return $this->resource;
} elseif ($this->loadFromData($imageRef) !== false) {
return $this->resource;
}
$this->logger->debug(__METHOD__ . '(): could not load anything. Giving up!', array('app' => 'core'));
return false;
}
/**
* Loads an image from an open file handle.
* It is the responsibility of the caller to position the pointer at the correct place and to close the handle again.
*
* @param resource $handle
* @return resource|false An image resource or false on error
*/
public function loadFromFileHandle($handle) {
$contents = stream_get_contents($handle);
if ($this->loadFromData($contents)) {
return $this->resource;
}
return false;
}
/**
* Loads an image from a local file.
*
* @param bool|string $imagePath The path to a local file.
* @return bool|resource An image resource or false on error
*/
public function loadFromFile($imagePath = false) {
// exif_imagetype throws "read error!" if file is less than 12 byte
if (!@is_file($imagePath) || !file_exists($imagePath) || filesize($imagePath) < 12 || !is_readable($imagePath)) {
return false;
}
$iType = exif_imagetype($imagePath);
switch ($iType) {
case IMAGETYPE_GIF:
if (imagetypes() & IMG_GIF) {
$this->resource = imagecreatefromgif($imagePath);
// Preserve transparency
imagealphablending($this->resource, true);
imagesavealpha($this->resource, true);
} else {
$this->logger->debug('OC_Image->loadFromFile, GIF images not supported: ' . $imagePath, array('app' => 'core'));
}
break;
case IMAGETYPE_JPEG:
if (imagetypes() & IMG_JPG) {
if (getimagesize($imagePath) !== false) {
$this->resource = @imagecreatefromjpeg($imagePath);
} else {
$this->logger->debug('OC_Image->loadFromFile, JPG image not valid: ' . $imagePath, array('app' => 'core'));
}
} else {
$this->logger->debug('OC_Image->loadFromFile, JPG images not supported: ' . $imagePath, array('app' => 'core'));
}
break;
case IMAGETYPE_PNG:
if (imagetypes() & IMG_PNG) {
$this->resource = @imagecreatefrompng($imagePath);
// Preserve transparency
imagealphablending($this->resource, true);
imagesavealpha($this->resource, true);
} else {
$this->logger->debug('OC_Image->loadFromFile, PNG images not supported: ' . $imagePath, array('app' => 'core'));
}
break;
case IMAGETYPE_XBM:
if (imagetypes() & IMG_XPM) {
$this->resource = @imagecreatefromxbm($imagePath);
} else {
$this->logger->debug('OC_Image->loadFromFile, XBM/XPM images not supported: ' . $imagePath, array('app' => 'core'));
}
break;
case IMAGETYPE_WBMP:
if (imagetypes() & IMG_WBMP) {
$this->resource = @imagecreatefromwbmp($imagePath);
} else {
$this->logger->debug('OC_Image->loadFromFile, WBMP images not supported: ' . $imagePath, array('app' => 'core'));
}
break;
case IMAGETYPE_BMP:
$this->resource = $this->imagecreatefrombmp($imagePath);
break;
/*
case IMAGETYPE_TIFF_II: // (intel byte order)
break;
case IMAGETYPE_TIFF_MM: // (motorola byte order)
break;
case IMAGETYPE_JPC:
break;
case IMAGETYPE_JP2:
break;
case IMAGETYPE_JPX:
break;
case IMAGETYPE_JB2:
break;
case IMAGETYPE_SWC:
break;
case IMAGETYPE_IFF:
break;
case IMAGETYPE_ICO:
break;
case IMAGETYPE_SWF:
break;
case IMAGETYPE_PSD:
break;
*/
default:
// this is mostly file created from encrypted file
$this->resource = imagecreatefromstring(\OC\Files\Filesystem::file_get_contents(\OC\Files\Filesystem::getLocalPath($imagePath)));
$iType = IMAGETYPE_PNG;
$this->logger->debug('OC_Image->loadFromFile, Default', array('app' => 'core'));
break;
}
if ($this->valid()) {
$this->imageType = $iType;
$this->mimeType = image_type_to_mime_type($iType);
$this->filePath = $imagePath;
}
return $this->resource;
}
/**
* Loads an image from a string of data.
*
* @param string $str A string of image data as read from a file.
* @return bool|resource An image resource or false on error
*/
public function loadFromData($str) {
if (is_resource($str)) {
return false;
}
$this->resource = @imagecreatefromstring($str);
if ($this->fileInfo) {
$this->mimeType = $this->fileInfo->buffer($str);
}
if (is_resource($this->resource)) {
imagealphablending($this->resource, false);
imagesavealpha($this->resource, true);
}
if (!$this->resource) {
$this->logger->debug('OC_Image->loadFromFile, could not load', array('app' => 'core'));
return false;
}
return $this->resource;
}
/**
* Loads an image from a base64 encoded string.
*
* @param string $str A string base64 encoded string of image data.
* @return bool|resource An image resource or false on error
*/
public function loadFromBase64($str) {
if (!is_string($str)) {
return false;
}
$data = base64_decode($str);
if ($data) { // try to load from string data
$this->resource = @imagecreatefromstring($data);
if ($this->fileInfo) {
$this->mimeType = $this->fileInfo->buffer($data);
}
if (!$this->resource) {
$this->logger->debug('OC_Image->loadFromBase64, could not load', array('app' => 'core'));
return false;
}
return $this->resource;
} else {
return false;
}
}
/**
* Create a new image from file or URL
*
* @link http://www.programmierer-forum.de/function-imagecreatefrombmp-laeuft-mit-allen-bitraten-t143137.htm
* @version 1.00
* @param string $fileName <p>
* Path to the BMP image.
* </p>
* @return bool|resource an image resource identifier on success, <b>FALSE</b> on errors.
*/
private function imagecreatefrombmp($fileName) {
if (!($fh = fopen($fileName, 'rb'))) {
$this->logger->warning('imagecreatefrombmp: Can not open ' . $fileName, array('app' => 'core'));
return false;
}
// read file header
$meta = unpack('vtype/Vfilesize/Vreserved/Voffset', fread($fh, 14));
// check for bitmap
if ($meta['type'] != 19778) {
fclose($fh);
$this->logger->warning('imagecreatefrombmp: Can not open ' . $fileName . ' is not a bitmap!', array('app' => 'core'));
return false;
}
// read image header
$meta += unpack('Vheadersize/Vwidth/Vheight/vplanes/vbits/Vcompression/Vimagesize/Vxres/Vyres/Vcolors/Vimportant', fread($fh, 40));
// read additional 16bit header
if ($meta['bits'] == 16) {
$meta += unpack('VrMask/VgMask/VbMask', fread($fh, 12));
}
// set bytes and padding
$meta['bytes'] = $meta['bits'] / 8;
$this->bitDepth = $meta['bits']; //remember the bit depth for the imagebmp call
$meta['decal'] = 4 - (4 * (($meta['width'] * $meta['bytes'] / 4) - floor($meta['width'] * $meta['bytes'] / 4)));
if ($meta['decal'] == 4) {
$meta['decal'] = 0;
}
// obtain imagesize
if ($meta['imagesize'] < 1) {
$meta['imagesize'] = $meta['filesize'] - $meta['offset'];
// in rare cases filesize is equal to offset so we need to read physical size
if ($meta['imagesize'] < 1) {
$meta['imagesize'] = @filesize($fileName) - $meta['offset'];
if ($meta['imagesize'] < 1) {
fclose($fh);
$this->logger->warning('imagecreatefrombmp: Can not obtain file size of ' . $fileName . ' is not a bitmap!', array('app' => 'core'));
return false;
}
}
}
// calculate colors
$meta['colors'] = !$meta['colors'] ? pow(2, $meta['bits']) : $meta['colors'];
// read color palette
$palette = array();
if ($meta['bits'] < 16) {
$palette = unpack('l' . $meta['colors'], fread($fh, $meta['colors'] * 4));
// in rare cases the color value is signed
if ($palette[1] < 0) {
foreach ($palette as $i => $color) {
$palette[$i] = $color + 16777216;
}
}
}
// create gd image
$im = imagecreatetruecolor($meta['width'], $meta['height']);
if ($im == false) {
fclose($fh);
$this->logger->warning(
'imagecreatefrombmp: imagecreatetruecolor failed for file "' . $fileName . '" with dimensions ' . $meta['width'] . 'x' . $meta['height'],
array('app' => 'core'));
return false;
}
$data = fread($fh, $meta['imagesize']);
$p = 0;
$vide = chr(0);
$y = $meta['height'] - 1;
$error = 'imagecreatefrombmp: ' . $fileName . ' has not enough data!';
// loop through the image data beginning with the lower left corner
while ($y >= 0) {
$x = 0;
while ($x < $meta['width']) {
switch ($meta['bits']) {
case 32:
case 24:
if (!($part = substr($data, $p, 3))) {
$this->logger->warning($error, array('app' => 'core'));
return $im;
}
$color = @unpack('V', $part . $vide);
break;
case 16:
if (!($part = substr($data, $p, 2))) {
fclose($fh);
$this->logger->warning($error, array('app' => 'core'));
return $im;
}
$color = @unpack('v', $part);
$color[1] = (($color[1] & 0xf800) >> 8) * 65536 + (($color[1] & 0x07e0) >> 3) * 256 + (($color[1] & 0x001f) << 3);
break;
case 8:
$color = @unpack('n', $vide . substr($data, $p, 1));
$color[1] = (isset($palette[$color[1] + 1])) ? $palette[$color[1] + 1] : $palette[1];
break;
case 4:
$color = @unpack('n', $vide . substr($data, floor($p), 1));
$color[1] = ($p * 2) % 2 == 0 ? $color[1] >> 4 : $color[1] & 0x0F;
$color[1] = (isset($palette[$color[1] + 1])) ? $palette[$color[1] + 1] : $palette[1];
break;
case 1:
$color = @unpack('n', $vide . substr($data, floor($p), 1));
switch (($p * 8) % 8) {
case 0:
$color[1] = $color[1] >> 7;
break;
case 1:
$color[1] = ($color[1] & 0x40) >> 6;
break;
case 2:
$color[1] = ($color[1] & 0x20) >> 5;
break;
case 3:
$color[1] = ($color[1] & 0x10) >> 4;
break;
case 4:
$color[1] = ($color[1] & 0x8) >> 3;
break;
case 5:
$color[1] = ($color[1] & 0x4) >> 2;
break;
case 6:
$color[1] = ($color[1] & 0x2) >> 1;
break;
case 7:
$color[1] = ($color[1] & 0x1);
break;
}
$color[1] = (isset($palette[$color[1] + 1])) ? $palette[$color[1] + 1] : $palette[1];
break;
default:
fclose($fh);
$this->logger->warning('imagecreatefrombmp: ' . $fileName . ' has ' . $meta['bits'] . ' bits and this is not supported!', array('app' => 'core'));
return false;
}
imagesetpixel($im, $x, $y, $color[1]);
$x++;
$p += $meta['bytes'];
}
$y--;
$p += $meta['decal'];
}
fclose($fh);
return $im;
}
/**
* Resizes the image preserving ratio.
*
* @param integer $maxSize The maximum size of either the width or height.
* @return bool
*/
public function resize($maxSize) {
if (!$this->valid()) {
$this->logger->error(__METHOD__ . '(): No image loaded', array('app' => 'core'));
return false;
}
$widthOrig = imagesx($this->resource);
$heightOrig = imagesy($this->resource);
$ratioOrig = $widthOrig / $heightOrig;
if ($ratioOrig > 1) {
$newHeight = round($maxSize / $ratioOrig);
$newWidth = $maxSize;
} else {
$newWidth = round($maxSize * $ratioOrig);
$newHeight = $maxSize;
}
$this->preciseResize(round($newWidth), round($newHeight));
return true;
}
/**
* @param int $width
* @param int $height
* @return bool
*/
public function preciseResize($width, $height) {
if (!$this->valid()) {
$this->logger->error(__METHOD__ . '(): No image loaded', array('app' => 'core'));
return false;
}
$widthOrig = imagesx($this->resource);
$heightOrig = imagesy($this->resource);
$process = imagecreatetruecolor($width, $height);
if ($process == false) {
$this->logger->error(__METHOD__ . '(): Error creating true color image', array('app' => 'core'));
imagedestroy($process);
return false;
}
// preserve transparency
if ($this->imageType == IMAGETYPE_GIF or $this->imageType == IMAGETYPE_PNG) {
imagecolortransparent($process, imagecolorallocatealpha($process, 0, 0, 0, 127));
imagealphablending($process, false);
imagesavealpha($process, true);
}
imagecopyresampled($process, $this->resource, 0, 0, 0, 0, $width, $height, $widthOrig, $heightOrig);
if ($process == false) {
$this->logger->error(__METHOD__ . '(): Error re-sampling process image', array('app' => 'core'));
imagedestroy($process);
return false;
}
imagedestroy($this->resource);
$this->resource = $process;
return true;
}
/**
* Crops the image to the middle square. If the image is already square it just returns.
*
* @param int $size maximum size for the result (optional)
* @return bool for success or failure
*/
public function centerCrop($size = 0) {
if (!$this->valid()) {
$this->logger->error('OC_Image->centerCrop, No image loaded', array('app' => 'core'));
return false;
}
$widthOrig = imagesx($this->resource);
$heightOrig = imagesy($this->resource);
if ($widthOrig === $heightOrig and $size == 0) {
return true;
}
$ratioOrig = $widthOrig / $heightOrig;
$width = $height = min($widthOrig, $heightOrig);
if ($ratioOrig > 1) {
$x = ($widthOrig / 2) - ($width / 2);
$y = 0;
} else {
$y = ($heightOrig / 2) - ($height / 2);
$x = 0;
}
if ($size > 0) {
$targetWidth = $size;
$targetHeight = $size;
} else {
$targetWidth = $width;
$targetHeight = $height;
}
$process = imagecreatetruecolor($targetWidth, $targetHeight);
if ($process == false) {
$this->logger->error('OC_Image->centerCrop, Error creating true color image', array('app' => 'core'));
imagedestroy($process);
return false;
}
// preserve transparency
if ($this->imageType == IMAGETYPE_GIF or $this->imageType == IMAGETYPE_PNG) {
imagecolortransparent($process, imagecolorallocatealpha($process, 0, 0, 0, 127));
imagealphablending($process, false);
imagesavealpha($process, true);
}
imagecopyresampled($process, $this->resource, 0, 0, $x, $y, $targetWidth, $targetHeight, $width, $height);
if ($process == false) {
$this->logger->error('OC_Image->centerCrop, Error re-sampling process image ' . $width . 'x' . $height, array('app' => 'core'));
imagedestroy($process);
return false;
}
imagedestroy($this->resource);
$this->resource = $process;
return true;
}
/**
* Crops the image from point $x$y with dimension $wx$h.
*
* @param int $x Horizontal position
* @param int $y Vertical position
* @param int $w Width
* @param int $h Height
* @return bool for success or failure
*/
public function crop($x, $y, $w, $h) {
if (!$this->valid()) {
$this->logger->error(__METHOD__ . '(): No image loaded', array('app' => 'core'));
return false;
}
$process = imagecreatetruecolor($w, $h);
if ($process == false) {
$this->logger->error(__METHOD__ . '(): Error creating true color image', array('app' => 'core'));
imagedestroy($process);
return false;
}
// preserve transparency
if ($this->imageType == IMAGETYPE_GIF or $this->imageType == IMAGETYPE_PNG) {
imagecolortransparent($process, imagecolorallocatealpha($process, 0, 0, 0, 127));
imagealphablending($process, false);
imagesavealpha($process, true);
}
imagecopyresampled($process, $this->resource, 0, 0, $x, $y, $w, $h, $w, $h);
if ($process == false) {
$this->logger->error(__METHOD__ . '(): Error re-sampling process image ' . $w . 'x' . $h, array('app' => 'core'));
imagedestroy($process);
return false;
}
imagedestroy($this->resource);
$this->resource = $process;
return true;
}
/**
* Resizes the image to fit within a boundary while preserving ratio.
*
* Warning: Images smaller than $maxWidth x $maxHeight will end up being scaled up
*
* @param integer $maxWidth
* @param integer $maxHeight
* @return bool
*/
public function fitIn($maxWidth, $maxHeight) {
if (!$this->valid()) {
$this->logger->error(__METHOD__ . '(): No image loaded', array('app' => 'core'));
return false;
}
$widthOrig = imagesx($this->resource);
$heightOrig = imagesy($this->resource);
$ratio = $widthOrig / $heightOrig;
$newWidth = min($maxWidth, $ratio * $maxHeight);
$newHeight = min($maxHeight, $maxWidth / $ratio);
$this->preciseResize(round($newWidth), round($newHeight));
return true;
}
/**
* Shrinks larger images to fit within specified boundaries while preserving ratio.
*
* @param integer $maxWidth
* @param integer $maxHeight
* @return bool
*/
public function scaleDownToFit($maxWidth, $maxHeight) {
if (!$this->valid()) {
$this->logger->error(__METHOD__ . '(): No image loaded', array('app' => 'core'));
return false;
}
$widthOrig = imagesx($this->resource);
$heightOrig = imagesy($this->resource);
if ($widthOrig > $maxWidth || $heightOrig > $maxHeight) {
return $this->fitIn($maxWidth, $maxHeight);
}
return false;
}
/**
* Destroys the current image and resets the object
*/
public function destroy() {
if ($this->valid()) {
imagedestroy($this->resource);
}
$this->resource = null;
}
public function __destruct() {
$this->destroy();
}
}
if (!function_exists('imagebmp')) {
/**
* Output a BMP image to either the browser or a file
*
* @link http://www.ugia.cn/wp-data/imagebmp.php
* @author legend <legendsky@hotmail.com>
* @link http://www.programmierer-forum.de/imagebmp-gute-funktion-gefunden-t143716.htm
* @author mgutt <marc@gutt.it>
* @version 1.00
* @param resource $im
* @param string $fileName [optional] <p>The path to save the file to.</p>
* @param int $bit [optional] <p>Bit depth, (default is 24).</p>
* @param int $compression [optional]
* @return bool <b>TRUE</b> on success or <b>FALSE</b> on failure.
*/
function imagebmp($im, $fileName = '', $bit = 24, $compression = 0) {
if (!in_array($bit, array(1, 4, 8, 16, 24, 32))) {
$bit = 24;
} else if ($bit == 32) {
$bit = 24;
}
$bits = pow(2, $bit);
imagetruecolortopalette($im, true, $bits);
$width = imagesx($im);
$height = imagesy($im);
$colorsNum = imagecolorstotal($im);
$rgbQuad = '';
if ($bit <= 8) {
for ($i = 0; $i < $colorsNum; $i++) {
$colors = imagecolorsforindex($im, $i);
$rgbQuad .= chr($colors['blue']) . chr($colors['green']) . chr($colors['red']) . "\0";
}
$bmpData = '';
if ($compression == 0 || $bit < 8) {
$compression = 0;
$extra = '';
$padding = 4 - ceil($width / (8 / $bit)) % 4;
if ($padding % 4 != 0) {
$extra = str_repeat("\0", $padding);
}
for ($j = $height - 1; $j >= 0; $j--) {
$i = 0;
while ($i < $width) {
$bin = 0;
$limit = $width - $i < 8 / $bit ? (8 / $bit - $width + $i) * $bit : 0;
for ($k = 8 - $bit; $k >= $limit; $k -= $bit) {
$index = imagecolorat($im, $i, $j);
$bin |= $index << $k;
$i++;
}
$bmpData .= chr($bin);
}
$bmpData .= $extra;
}
} // RLE8
else if ($compression == 1 && $bit == 8) {
for ($j = $height - 1; $j >= 0; $j--) {
$lastIndex = "\0";
$sameNum = 0;
for ($i = 0; $i <= $width; $i++) {
$index = imagecolorat($im, $i, $j);
if ($index !== $lastIndex || $sameNum > 255) {
if ($sameNum != 0) {
$bmpData .= chr($sameNum) . chr($lastIndex);
}
$lastIndex = $index;
$sameNum = 1;
} else {
$sameNum++;
}
}
$bmpData .= "\0\0";
}
$bmpData .= "\0\1";
}
$sizeQuad = strlen($rgbQuad);
$sizeData = strlen($bmpData);
} else {
$extra = '';
$padding = 4 - ($width * ($bit / 8)) % 4;
if ($padding % 4 != 0) {
$extra = str_repeat("\0", $padding);
}
$bmpData = '';
for ($j = $height - 1; $j >= 0; $j--) {
for ($i = 0; $i < $width; $i++) {
$index = imagecolorat($im, $i, $j);
$colors = imagecolorsforindex($im, $index);
if ($bit == 16) {
$bin = 0 << $bit;
$bin |= ($colors['red'] >> 3) << 10;
$bin |= ($colors['green'] >> 3) << 5;
$bin |= $colors['blue'] >> 3;
$bmpData .= pack("v", $bin);
} else {
$bmpData .= pack("c*", $colors['blue'], $colors['green'], $colors['red']);
}
}
$bmpData .= $extra;
}
$sizeQuad = 0;
$sizeData = strlen($bmpData);
$colorsNum = 0;
}
$fileHeader = 'BM' . pack('V3', 54 + $sizeQuad + $sizeData, 0, 54 + $sizeQuad);
$infoHeader = pack('V3v2V*', 0x28, $width, $height, 1, $bit, $compression, $sizeData, 0, 0, $colorsNum, 0);
if ($fileName != '') {
$fp = fopen($fileName, 'wb');
fwrite($fp, $fileHeader . $infoHeader . $rgbQuad . $bmpData);
fclose($fp);
return true;
}
echo $fileHeader . $infoHeader . $rgbQuad . $bmpData;
return true;
}
}
if (!function_exists('exif_imagetype')) {
/**
* Workaround if exif_imagetype does not exist
*
* @link http://www.php.net/manual/en/function.exif-imagetype.php#80383
* @param string $fileName
* @return string|boolean
*/
function exif_imagetype($fileName) {
if (($info = getimagesize($fileName)) !== false) {
return $info[2];
}
return false;
}
}