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+<?php
+/**
+ * @author Andreas Fischer <bantu@owncloud.com>
+ * @author Bart Visscher <bartv@thisnet.nl>
+ * @author Bartek Przybylski <bart.p.pl@gmail.com>
+ * @author Björn Schießle <schiessle@owncloud.com>
+ * @author Byron Marohn <combustible@live.com>
+ * @author Christopher Schäpers <kondou@ts.unde.re>
+ * @author Georg Ehrke <georg@owncloud.com>
+ * @author j-ed <juergen@eisfair.org>
+ * @author Joas Schilling <nickvergessen@owncloud.com>
+ * @author Johannes Willnecker <johannes@willnecker.com>
+ * @author Jörn Friedrich Dreyer <jfd@butonic.de>
+ * @author Lukas Reschke <lukas@owncloud.com>
+ * @author Morris Jobke <hey@morrisjobke.de>
+ * @author Olivier Paroz <github@oparoz.com>
+ * @author Robin Appelman <icewind@owncloud.com>
+ * @author Thomas Müller <thomas.mueller@tmit.eu>
+ * @author Thomas Tanghus <thomas@tanghus.net>
+ *
+ * @copyright Copyright (c) 2016, ownCloud, Inc.
+ * @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;
+
+ /**
+ * Get mime type for an image file.
+ *
+ * @param string|null $filePath The path to a local image file.
+ * @return string The mime type if the it could be determined, otherwise an empty string.
+ */
+ static public function getMimeTypeForFile($filePath) {
+ // exif_imagetype throws "read error!" if file is less than 12 byte
+ if ($filePath !== null && filesize($filePath) > 11) {
+ $imageType = exif_imagetype($filePath);
+ } else {
+ $imageType = false;
+ }
+ return $imageType ? image_type_to_mime_type($imageType) : '';
+ }
+
+ /**
+ * 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 $logger
+ */
+ public function __construct($imageRef = null, $logger = null) {
+ $this->logger = $logger;
+ if (is_null($logger)) {
+ $this->logger = \OC::$server->getLogger();
+ }
+
+ if (!extension_loaded('gd') || !function_exists('gd_info')) {
+ $this->logger->error(__METHOD__ . '(): GD module not installed', array('app' => 'core'));
+ return false;
+ }
+
+ if (\OC_Util::fileInfoLoaded()) {
+ $this->fileInfo = new finfo(FILEINFO_MIME_TYPE);
+ }
+
+ if (!is_null($imageRef)) {
+ $this->load($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 && $this->filePath === null) {
+ $this->logger->error(__METHOD__ . '(): called with no path.', array('app' => 'core'));
+ return false;
+ } elseif ($filePath === null && $this->filePath !== null) {
+ $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);
+ if (!is_writable(dirname($filePath))) {
+ $this->logger->error(__METHOD__ . '(): Directory \'' . dirname($filePath) . '\' is not writable.', array('app' => 'core'));
+ return false;
+ } elseif (is_writable(dirname($filePath)) && file_exists($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);
+ 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 $this->resource;
+ }
+
+ /**
+ * @return null|string Returns the raw image data.
+ */
+ public function data() {
+ if (!$this->valid()) {
+ return null;
+ }
+ ob_start();
+ switch ($this->mimeType) {
+ case "image/png":
+ $res = imagepng($this->resource);
+ break;
+ case "image/jpeg":
+ $res = imagejpeg($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) {
+ $this->logger->error('OC_Image->data. Error getting image data.', array('app' => 'core'));
+ }
+ return ob_get_clean();
+ }
+
+ /**
+ * @return string - base64 encoded, which is suitable for embedding in a VCard.
+ */
+ function __toString() {
+ return base64_encode($this->data());
+ }
+
+ /**
+ * (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->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;
+ }
+ return $exif['Orientation'];
+ }
+
+ /**
+ * (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) {
+ $this->resource = imagecreatefromjpeg($imagePath);
+ } 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] = $palette[$color[1] + 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] = $palette[$color[1] + 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] = $palette[$color[1] + 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 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;
+ }
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-30 21:35:50 +0000