949 lines
27 KiB
PHP
949 lines
27 KiB
PHP
<?php
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/**
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* ownCloud
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*
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* @author Thomas Tanghus
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* @copyright 2011 Thomas Tanghus <thomas@tanghus.net>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
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* License as published by the Free Software Foundation; either
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* version 3 of the License, or any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU AFFERO GENERAL PUBLIC LICENSE for more details.
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*
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* You should have received a copy of the GNU Affero General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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/**
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* Class for basic image manipulation
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*/
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class OC_Image {
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protected $resource = false; // tmp resource.
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protected $imagetype = IMAGETYPE_PNG; // Default to png if file type isn't evident.
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protected $bit_depth = 24;
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protected $filepath = null;
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/**
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* @brief Get mime type for an image file.
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* @param $filepath The path to a local image file.
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* @returns string The mime type if the it could be determined, otherwise an empty string.
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*/
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static public function getMimeTypeForFile($filepath) {
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$imagetype = exif_imagetype($filepath);
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return $imagetype ? image_type_to_mime_type($imagetype) : '';
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}
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/**
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* @brief Constructor.
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* @param $imageref The path to a local file, a base64 encoded string or a resource created by an imagecreate* function.
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* @returns bool False on error
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*/
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public function __construct($imageref = null) {
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//OC_Log::write('core',__METHOD__.'(): start', OC_Log::DEBUG);
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if(!extension_loaded('gd') || !function_exists('gd_info')) {
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OC_Log::write('core', __METHOD__.'(): GD module not installed', OC_Log::ERROR);
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return false;
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}
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if(!is_null($imageref)) {
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$this->load($imageref);
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}
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}
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/**
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* @brief Determine whether the object contains an image resource.
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* @returns bool
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*/
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public function valid() { // apparently you can't name a method 'empty'...
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return is_resource($this->resource);
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}
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/**
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* @brief Returns the MIME type of the image or an empty string if no image is loaded.
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* @returns int
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*/
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public function mimeType() {
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return $this->valid() ? image_type_to_mime_type($this->imagetype) : '';
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}
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/**
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* @brief Returns the width of the image or -1 if no image is loaded.
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* @returns int
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*/
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public function width() {
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return $this->valid() ? imagesx($this->resource) : -1;
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}
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/**
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* @brief Returns the height of the image or -1 if no image is loaded.
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* @returns int
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*/
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public function height() {
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return $this->valid() ? imagesy($this->resource) : -1;
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}
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/**
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* @brief Returns the width when the image orientation is top-left.
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* @returns int
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*/
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public function widthTopLeft() {
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$o = $this->getOrientation();
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OC_Log::write('core', 'OC_Image->widthTopLeft() Orientation: '.$o, OC_Log::DEBUG);
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switch($o) {
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case -1:
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case 1:
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case 2: // Not tested
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case 3:
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case 4: // Not tested
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return $this->width();
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break;
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case 5: // Not tested
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case 6:
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case 7: // Not tested
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case 8:
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return $this->height();
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break;
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}
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return $this->width();
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}
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/**
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* @brief Returns the height when the image orientation is top-left.
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* @returns int
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*/
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public function heightTopLeft() {
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$o = $this->getOrientation();
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OC_Log::write('core', 'OC_Image->heightTopLeft() Orientation: '.$o, OC_Log::DEBUG);
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switch($o) {
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case -1:
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case 1:
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case 2: // Not tested
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case 3:
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case 4: // Not tested
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return $this->height();
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break;
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case 5: // Not tested
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case 6:
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case 7: // Not tested
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case 8:
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return $this->width();
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break;
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}
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return $this->height();
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}
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/**
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* @brief Outputs the image.
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* @returns bool
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*/
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public function show() {
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header('Content-Type: '.$this->mimeType());
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return $this->_output();
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}
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/**
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* @brief Saves the image.
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* @returns bool
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*/
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public function save($filepath=null) {
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if($filepath === null && $this->filepath === null) {
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OC_Log::write('core', __METHOD__.'(): called with no path.', OC_Log::ERROR);
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return false;
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} elseif($filepath === null && $this->filepath !== null) {
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$filepath = $this->filepath;
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}
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return $this->_output($filepath);
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}
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/**
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* @brief Outputs/saves the image.
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*/
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private function _output($filepath=null) {
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if($filepath) {
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if (!file_exists(dirname($filepath)))
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mkdir(dirname($filepath), 0777, true);
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if(!is_writable(dirname($filepath))) {
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OC_Log::write('core', __METHOD__.'(): Directory \''.dirname($filepath).'\' is not writable.', OC_Log::ERROR);
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return false;
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} elseif(is_writable(dirname($filepath)) && file_exists($filepath) && !is_writable($filepath)) {
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OC_Log::write('core', __METHOD__.'(): File \''.$filepath.'\' is not writable.', OC_Log::ERROR);
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return false;
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}
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}
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if (!$this->valid()) {
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return false;
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}
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$retval = false;
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switch($this->imagetype) {
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case IMAGETYPE_GIF:
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$retval = imagegif($this->resource, $filepath);
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break;
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case IMAGETYPE_JPEG:
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$retval = imagejpeg($this->resource, $filepath);
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break;
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case IMAGETYPE_PNG:
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$retval = imagepng($this->resource, $filepath);
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break;
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case IMAGETYPE_XBM:
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$retval = imagexbm($this->resource, $filepath);
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break;
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case IMAGETYPE_WBMP:
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$retval = imagewbmp($this->resource, $filepath);
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break;
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case IMAGETYPE_BMP:
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$retval = imagebmp($this->resource, $filepath, $this->bit_depth);
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break;
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default:
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$retval = imagepng($this->resource, $filepath);
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}
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return $retval;
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}
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/**
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* @brief Prints the image when called as $image().
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*/
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public function __invoke() {
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return $this->show();
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}
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/**
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* @returns Returns the image resource in any.
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*/
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public function resource() {
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return $this->resource;
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}
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/**
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* @returns Returns the raw image data.
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*/
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function data() {
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ob_start();
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$res = imagepng($this->resource);
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if (!$res) {
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OC_Log::write('core', 'OC_Image->data. Error getting image data.', OC_Log::ERROR);
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}
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return ob_get_clean();
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}
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/**
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* @returns Returns a base64 encoded string suitable for embedding in a VCard.
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*/
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function __toString() {
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return base64_encode($this->data());
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}
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/**
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* (I'm open for suggestions on better method name ;)
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* @brief Get the orientation based on EXIF data.
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* @returns The orientation or -1 if no EXIF data is available.
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*/
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public function getOrientation() {
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if(!is_callable('exif_read_data')) {
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OC_Log::write('core', 'OC_Image->fixOrientation() Exif module not enabled.', OC_Log::DEBUG);
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return -1;
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}
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if(!$this->valid()) {
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OC_Log::write('core', 'OC_Image->fixOrientation() No image loaded.', OC_Log::DEBUG);
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return -1;
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}
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if(is_null($this->filepath) || !is_readable($this->filepath)) {
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OC_Log::write('core', 'OC_Image->fixOrientation() No readable file path set.', OC_Log::DEBUG);
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return -1;
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}
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$exif = @exif_read_data($this->filepath, 'IFD0');
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if(!$exif) {
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return -1;
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}
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if(!isset($exif['Orientation'])) {
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return -1;
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}
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return $exif['Orientation'];
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}
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/**
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* (I'm open for suggestions on better method name ;)
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* @brief Fixes orientation based on EXIF data.
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* @returns bool.
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*/
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public function fixOrientation() {
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$o = $this->getOrientation();
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OC_Log::write('core', 'OC_Image->fixOrientation() Orientation: '.$o, OC_Log::DEBUG);
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$rotate = 0;
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$flip = false;
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switch($o) {
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case -1:
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return false; //Nothing to fix
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break;
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case 1:
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$rotate = 0;
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$flip = false;
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break;
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case 2: // Not tested
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$rotate = 0;
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$flip = true;
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break;
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case 3:
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$rotate = 180;
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$flip = false;
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break;
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case 4: // Not tested
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$rotate = 180;
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$flip = true;
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break;
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case 5: // Not tested
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$rotate = 90;
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$flip = true;
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break;
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case 6:
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//$rotate = 90;
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$rotate = 270;
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$flip = false;
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break;
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case 7: // Not tested
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$rotate = 270;
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$flip = true;
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break;
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case 8:
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$rotate = 90;
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$flip = false;
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break;
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}
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if($rotate) {
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$res = imagerotate($this->resource, $rotate, -1);
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if($res) {
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if(imagealphablending($res, true)) {
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if(imagesavealpha($res, true)) {
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imagedestroy($this->resource);
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$this->resource = $res;
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return true;
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} else {
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OC_Log::write('core', 'OC_Image->fixOrientation() Error during alphasaving.', OC_Log::DEBUG);
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return false;
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}
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} else {
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OC_Log::write('core', 'OC_Image->fixOrientation() Error during alphablending.', OC_Log::DEBUG);
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return false;
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}
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} else {
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OC_Log::write('core', 'OC_Image->fixOrientation() Error during oriention fixing.', OC_Log::DEBUG);
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return false;
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}
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}
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}
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/**
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* @brief Loads an image from a local file, a base64 encoded string or a resource created by an imagecreate* function.
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* @param $imageref The path to a local file, a base64 encoded string or a resource created by an imagecreate* function or a file resource (file handle ).
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* @returns An image resource or false on error
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*/
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public function load($imageref) {
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if(is_resource($imageref)) {
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if(get_resource_type($imageref) == 'gd') {
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$this->resource = $imageref;
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return $this->resource;
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} elseif(in_array(get_resource_type($imageref), array('file', 'stream'))) {
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return $this->loadFromFileHandle($imageref);
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}
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} elseif($this->loadFromFile($imageref) !== false) {
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return $this->resource;
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} elseif($this->loadFromBase64($imageref) !== false) {
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return $this->resource;
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} elseif($this->loadFromData($imageref) !== false) {
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return $this->resource;
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} else {
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OC_Log::write('core', __METHOD__.'(): couldn\'t load anything. Giving up!', OC_Log::DEBUG);
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return false;
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}
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}
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/**
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* @brief Loads an image from an open file handle.
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* It is the responsibility of the caller to position the pointer at the correct place and to close the handle again.
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* @param $handle
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* @returns An image resource or false on error
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*/
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public function loadFromFileHandle($handle) {
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OC_Log::write('core', __METHOD__.'(): Trying', OC_Log::DEBUG);
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$contents = stream_get_contents($handle);
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if($this->loadFromData($contents)) {
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return $this->resource;
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}
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}
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/**
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* @brief Loads an image from a local file.
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* @param $imageref The path to a local file.
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* @returns An image resource or false on error
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*/
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public function loadFromFile($imagepath=false) {
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if(!is_file($imagepath) || !file_exists($imagepath) || !is_readable($imagepath)) {
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// Debug output disabled because this method is tried before loadFromBase64?
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OC_Log::write('core', 'OC_Image->loadFromFile, couldn\'t load: '.$imagepath, OC_Log::DEBUG);
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return false;
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}
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$itype = exif_imagetype($imagepath);
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switch($itype) {
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case IMAGETYPE_GIF:
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if (imagetypes() & IMG_GIF) {
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$this->resource = imagecreatefromgif($imagepath);
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} else {
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OC_Log::write('core', 'OC_Image->loadFromFile, GIF images not supported: '.$imagepath, OC_Log::DEBUG);
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}
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break;
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case IMAGETYPE_JPEG:
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if (imagetypes() & IMG_JPG) {
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$this->resource = imagecreatefromjpeg($imagepath);
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} else {
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OC_Log::write('core', 'OC_Image->loadFromFile, JPG images not supported: '.$imagepath, OC_Log::DEBUG);
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}
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break;
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case IMAGETYPE_PNG:
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if (imagetypes() & IMG_PNG) {
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$this->resource = imagecreatefrompng($imagepath);
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} else {
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OC_Log::write('core', 'OC_Image->loadFromFile, PNG images not supported: '.$imagepath, OC_Log::DEBUG);
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}
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break;
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case IMAGETYPE_XBM:
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if (imagetypes() & IMG_XPM) {
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$this->resource = imagecreatefromxbm($imagepath);
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} else {
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OC_Log::write('core', 'OC_Image->loadFromFile, XBM/XPM images not supported: '.$imagepath, OC_Log::DEBUG);
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}
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break;
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case IMAGETYPE_WBMP:
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if (imagetypes() & IMG_WBMP) {
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$this->resource = imagecreatefromwbmp($imagepath);
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} else {
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OC_Log::write('core', 'OC_Image->loadFromFile, WBMP images not supported: '.$imagepath, OC_Log::DEBUG);
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}
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break;
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case IMAGETYPE_BMP:
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$this->resource = $this->imagecreatefrombmp($imagepath);
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break;
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/*
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case IMAGETYPE_TIFF_II: // (intel byte order)
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break;
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case IMAGETYPE_TIFF_MM: // (motorola byte order)
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break;
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case IMAGETYPE_JPC:
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break;
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case IMAGETYPE_JP2:
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break;
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case IMAGETYPE_JPX:
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break;
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case IMAGETYPE_JB2:
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break;
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case IMAGETYPE_SWC:
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break;
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case IMAGETYPE_IFF:
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break;
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case IMAGETYPE_ICO:
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break;
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case IMAGETYPE_SWF:
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break;
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case IMAGETYPE_PSD:
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break;
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*/
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default:
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// this is mostly file created from encrypted file
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$this->resource = imagecreatefromstring(\OC\Files\Filesystem::file_get_contents(\OC\Files\Filesystem::getLocalPath($imagepath)));
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$itype = IMAGETYPE_PNG;
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OC_Log::write('core', 'OC_Image->loadFromFile, Default', OC_Log::DEBUG);
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break;
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}
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if($this->valid()) {
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$this->imagetype = $itype;
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$this->filepath = $imagepath;
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}
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return $this->resource;
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}
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|
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/**
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* @brief Loads an image from a string of data.
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* @param $str A string of image data as read from a file.
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* @returns An image resource or false on error
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*/
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public function loadFromData($str) {
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if(is_resource($str)) {
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return false;
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}
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$this->resource = @imagecreatefromstring($str);
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if(!$this->resource) {
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OC_Log::write('core', 'OC_Image->loadFromData, couldn\'t load', OC_Log::DEBUG);
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return false;
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}
|
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return $this->resource;
|
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}
|
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|
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/**
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* @brief Loads an image from a base64 encoded string.
|
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* @param $str A string base64 encoded string of image data.
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* @returns An image resource or false on error
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*/
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public function loadFromBase64($str) {
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if(!is_string($str)) {
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return false;
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}
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$data = base64_decode($str);
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if($data) { // try to load from string data
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$this->resource = @imagecreatefromstring($data);
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if(!$this->resource) {
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OC_Log::write('core', 'OC_Image->loadFromBase64, couldn\'t load', OC_Log::DEBUG);
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return false;
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}
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return $this->resource;
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} else {
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return false;
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}
|
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}
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|
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/**
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* Create a new image from file or URL
|
|
* @link http://www.programmierer-forum.de/function-imagecreatefrombmp-laeuft-mit-allen-bitraten-t143137.htm
|
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* @version 1.00
|
|
* @param string $filename <p>
|
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* Path to the BMP image.
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* </p>
|
|
* @return resource an image resource identifier on success, <b>FALSE</b> on errors.
|
|
*/
|
|
private function imagecreatefrombmp($filename) {
|
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if (!($fh = fopen($filename, 'rb'))) {
|
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trigger_error('imagecreatefrombmp: Can not open ' . $filename, E_USER_WARNING);
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return false;
|
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}
|
|
// read file header
|
|
$meta = unpack('vtype/Vfilesize/Vreserved/Voffset', fread($fh, 14));
|
|
// check for bitmap
|
|
if ($meta['type'] != 19778) {
|
|
trigger_error('imagecreatefrombmp: ' . $filename . ' is not a bitmap!', E_USER_WARNING);
|
|
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->bit_depth = $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) {
|
|
trigger_error('imagecreatefrombmp: Can not obtain filesize of ' . $filename . '!', E_USER_WARNING);
|
|
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']);
|
|
$data = fread($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, $p, 3))) {
|
|
trigger_error($error, E_USER_WARNING);
|
|
return $im;
|
|
}
|
|
$color = unpack('V', $part . $vide);
|
|
break;
|
|
case 16:
|
|
if (!($part = substr($data, $p, 2))) {
|
|
trigger_error($error, E_USER_WARNING);
|
|
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:
|
|
trigger_error('imagecreatefrombmp: ' . $filename . ' has ' . $meta['bits'] . ' bits and this is not supported!', E_USER_WARNING);
|
|
return false;
|
|
}
|
|
imagesetpixel($im, $x, $y, $color[1]);
|
|
$x++;
|
|
$p += $meta['bytes'];
|
|
}
|
|
$y--;
|
|
$p += $meta['decal'];
|
|
}
|
|
fclose($fh);
|
|
return $im;
|
|
}
|
|
|
|
/**
|
|
* @brief Resizes the image preserving ratio.
|
|
* @param $maxsize The maximum size of either the width or height.
|
|
* @returns bool
|
|
*/
|
|
public function resize($maxsize) {
|
|
if(!$this->valid()) {
|
|
OC_Log::write('core', __METHOD__.'(): No image loaded', OC_Log::ERROR);
|
|
return false;
|
|
}
|
|
$width_orig=imageSX($this->resource);
|
|
$height_orig=imageSY($this->resource);
|
|
$ratio_orig = $width_orig/$height_orig;
|
|
|
|
if ($ratio_orig > 1) {
|
|
$new_height = round($maxsize/$ratio_orig);
|
|
$new_width = $maxsize;
|
|
} else {
|
|
$new_width = round($maxsize*$ratio_orig);
|
|
$new_height = $maxsize;
|
|
}
|
|
|
|
$this->preciseResize(round($new_width), round($new_height));
|
|
return true;
|
|
}
|
|
|
|
public function preciseResize($width, $height) {
|
|
if (!$this->valid()) {
|
|
OC_Log::write('core', __METHOD__.'(): No image loaded', OC_Log::ERROR);
|
|
return false;
|
|
}
|
|
$width_orig=imageSX($this->resource);
|
|
$height_orig=imageSY($this->resource);
|
|
$process = imagecreatetruecolor($width, $height);
|
|
|
|
if ($process == false) {
|
|
OC_Log::write('core', __METHOD__.'(): Error creating true color image', OC_Log::ERROR);
|
|
imagedestroy($process);
|
|
return false;
|
|
}
|
|
|
|
imagecopyresampled($process, $this->resource, 0, 0, 0, 0, $width, $height, $width_orig, $height_orig);
|
|
if ($process == false) {
|
|
OC_Log::write('core', __METHOD__.'(): Error resampling process image '.$width.'x'.$height, OC_Log::ERROR);
|
|
imagedestroy($process);
|
|
return false;
|
|
}
|
|
imagedestroy($this->resource);
|
|
$this->resource = $process;
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* @brief Crops the image to the middle square. If the image is already square it just returns.
|
|
* @param int maximum size for the result (optional)
|
|
* @returns bool for success or failure
|
|
*/
|
|
public function centerCrop($size=0) {
|
|
if(!$this->valid()) {
|
|
OC_Log::write('core', 'OC_Image->centerCrop, No image loaded', OC_Log::ERROR);
|
|
return false;
|
|
}
|
|
$width_orig=imageSX($this->resource);
|
|
$height_orig=imageSY($this->resource);
|
|
if($width_orig === $height_orig and $size==0) {
|
|
return true;
|
|
}
|
|
$ratio_orig = $width_orig/$height_orig;
|
|
$width = $height = min($width_orig, $height_orig);
|
|
|
|
if ($ratio_orig > 1) {
|
|
$x = ($width_orig/2) - ($width/2);
|
|
$y = 0;
|
|
} else {
|
|
$y = ($height_orig/2) - ($height/2);
|
|
$x = 0;
|
|
}
|
|
if($size>0) {
|
|
$targetWidth=$size;
|
|
$targetHeight=$size;
|
|
}else{
|
|
$targetWidth=$width;
|
|
$targetHeight=$height;
|
|
}
|
|
$process = imagecreatetruecolor($targetWidth, $targetHeight);
|
|
if ($process == false) {
|
|
OC_Log::write('core', 'OC_Image->centerCrop. Error creating true color image', OC_Log::ERROR);
|
|
imagedestroy($process);
|
|
return false;
|
|
}
|
|
imagecopyresampled($process, $this->resource, 0, 0, $x, $y, $targetWidth, $targetHeight, $width, $height);
|
|
if ($process == false) {
|
|
OC_Log::write('core', 'OC_Image->centerCrop. Error resampling process image '.$width.'x'.$height, OC_Log::ERROR);
|
|
imagedestroy($process);
|
|
return false;
|
|
}
|
|
imagedestroy($this->resource);
|
|
$this->resource = $process;
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* @brief Crops the image from point $x$y with dimension $wx$h.
|
|
* @param $x Horizontal position
|
|
* @param $y Vertical position
|
|
* @param $w Width
|
|
* @param $h Hight
|
|
* @returns bool for success or failure
|
|
*/
|
|
public function crop($x, $y, $w, $h) {
|
|
if(!$this->valid()) {
|
|
OC_Log::write('core', __METHOD__.'(): No image loaded', OC_Log::ERROR);
|
|
return false;
|
|
}
|
|
$process = imagecreatetruecolor($w, $h);
|
|
if ($process == false) {
|
|
OC_Log::write('core', __METHOD__.'(): Error creating true color image', OC_Log::ERROR);
|
|
imagedestroy($process);
|
|
return false;
|
|
}
|
|
imagecopyresampled($process, $this->resource, 0, 0, $x, $y, $w, $h, $w, $h);
|
|
if ($process == false) {
|
|
OC_Log::write('core', __METHOD__.'(): Error resampling process image '.$w.'x'.$h, OC_Log::ERROR);
|
|
imagedestroy($process);
|
|
return false;
|
|
}
|
|
imagedestroy($this->resource);
|
|
$this->resource = $process;
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* @brief Resizes the image to fit within a boundry while preserving ratio.
|
|
* @param $maxWidth
|
|
* @param $maxHeight
|
|
* @returns bool
|
|
*/
|
|
public function fitIn($maxWidth, $maxHeight) {
|
|
if(!$this->valid()) {
|
|
OC_Log::write('core', __METHOD__.'(): No image loaded', OC_Log::ERROR);
|
|
return false;
|
|
}
|
|
$width_orig=imageSX($this->resource);
|
|
$height_orig=imageSY($this->resource);
|
|
$ratio = $width_orig/$height_orig;
|
|
|
|
$newWidth = min($maxWidth, $ratio*$maxHeight);
|
|
$newHeight = min($maxHeight, $maxWidth/$ratio);
|
|
|
|
$this->preciseResize(round($newWidth), round($newHeight));
|
|
return true;
|
|
}
|
|
|
|
public function destroy() {
|
|
if($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 $image
|
|
* @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);
|
|
$colors_num = imagecolorstotal($im);
|
|
$rgb_quad = '';
|
|
if ($bit <= 8) {
|
|
for ($i = 0; $i < $colors_num; $i++) {
|
|
$colors = imagecolorsforindex($im, $i);
|
|
$rgb_quad .= chr($colors['blue']) . chr($colors['green']) . chr($colors['red']) . "\0";
|
|
}
|
|
$bmp_data = '';
|
|
if ($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++;
|
|
}
|
|
$bmp_data .= chr($bin);
|
|
}
|
|
$bmp_data .= $extra;
|
|
}
|
|
}
|
|
// RLE8
|
|
else if ($compression == 1 && $bit == 8) {
|
|
for ($j = $height - 1; $j >= 0; $j--) {
|
|
$last_index = "\0";
|
|
$same_num = 0;
|
|
for ($i = 0; $i <= $width; $i++) {
|
|
$index = imagecolorat($im, $i, $j);
|
|
if ($index !== $last_index || $same_num > 255) {
|
|
if ($same_num != 0) {
|
|
$bmp_data .= chr($same_num) . chr($last_index);
|
|
}
|
|
$last_index = $index;
|
|
$same_num = 1;
|
|
}
|
|
else {
|
|
$same_num++;
|
|
}
|
|
}
|
|
$bmp_data .= "\0\0";
|
|
}
|
|
$bmp_data .= "\0\1";
|
|
}
|
|
$size_quad = strlen($rgb_quad);
|
|
$size_data = strlen($bmp_data);
|
|
}
|
|
else {
|
|
$extra = '';
|
|
$padding = 4 - ($width * ($bit / 8)) % 4;
|
|
if ($padding % 4 != 0) {
|
|
$extra = str_repeat("\0", $padding);
|
|
}
|
|
$bmp_data = '';
|
|
for ($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;
|
|
$bmp_data .= pack("v", $bin);
|
|
}
|
|
else {
|
|
$bmp_data .= pack("c*", $colors['blue'], $colors['green'], $colors['red']);
|
|
}
|
|
}
|
|
$bmp_data .= $extra;
|
|
}
|
|
$size_quad = 0;
|
|
$size_data = strlen($bmp_data);
|
|
$colors_num = 0;
|
|
}
|
|
$file_header = 'BM' . pack('V3', 54 + $size_quad + $size_data, 0, 54 + $size_quad);
|
|
$info_header = pack('V3v2V*', 0x28, $width, $height, 1, $bit, $compression, $size_data, 0, 0, $colors_num, 0);
|
|
if ($filename != '') {
|
|
$fp = fopen($filename, 'wb');
|
|
fwrite($fp, $file_header . $info_header . $rgb_quad . $bmp_data);
|
|
fclose($fp);
|
|
return true;
|
|
}
|
|
echo $file_header . $info_header. $rgb_quad . $bmp_data;
|
|
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;
|
|
}
|
|
}
|