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<?php/*** CodeIgniter** An open source application development framework for PHP** This content is released under the MIT License (MIT)** Copyright (c) 2014 - 2017, British Columbia Institute of Technology** Permission is hereby granted, free of charge, to any person obtaining a copy* of this software and associated documentation files (the "Software"), to deal* in the Software without restriction, including without limitation the rights* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell* copies of the Software, and to permit persons to whom the Software is* furnished to do so, subject to the following conditions:** The above copyright notice and this permission notice shall be included in* all copies or substantial portions of the Software.** THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN* THE SOFTWARE.** @package CodeIgniter* @author EllisLab Dev Team* @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)* @copyright Copyright (c) 2014 - 2017, British Columbia Institute of Technology (http://bcit.ca/)* @license http://opensource.org/licenses/MIT MIT License* @link https://codeigniter.com* @since Version 1.0.0* @filesource*/defined('BASEPATH') OR exit('No direct script access allowed');/*** Image Manipulation class** @package CodeIgniter* @subpackage Libraries* @category Image_lib* @author EllisLab Dev Team* @link https://codeigniter.com/user_guide/libraries/image_lib.html*/class CI_Image_lib {/*** PHP extension/library to use for image manipulation* Can be: imagemagick, netpbm, gd, gd2** @var string*/public $image_library = 'gd2';/*** Path to the graphic library (if applicable)** @var string*/public $library_path = '';/*** Whether to send to browser or write to disk** @var bool*/public $dynamic_output = FALSE;/*** Path to original image** @var string*/public $source_image = '';/*** Path to the modified image** @var string*/public $new_image = '';/*** Image width** @var int*/public $width = '';/*** Image height** @var int*/public $height = '';/*** Quality percentage of new image** @var int*/public $quality = 90;/*** Whether to create a thumbnail** @var bool*/public $create_thumb = FALSE;/*** String to add to thumbnail version of image** @var string*/public $thumb_marker = '_thumb';/*** Whether to maintain aspect ratio when resizing or use hard values** @var bool*/public $maintain_ratio = TRUE;/*** auto, height, or width. Determines what to use as the master dimension** @var string*/public $master_dim = 'auto';/*** Angle at to rotate image** @var string*/public $rotation_angle = '';/*** X Coordinate for manipulation of the current image** @var int*/public $x_axis = '';/*** Y Coordinate for manipulation of the current image** @var int*/public $y_axis = '';// --------------------------------------------------------------------------// Watermark Vars// --------------------------------------------------------------------------/*** Watermark text if graphic is not used** @var string*/public $wm_text = '';/*** Type of watermarking. Options: text/overlay** @var string*/public $wm_type = 'text';/*** Default transparency for watermark** @var int*/public $wm_x_transp = 4;/*** Default transparency for watermark** @var int*/public $wm_y_transp = 4;/*** Watermark image path** @var string*/public $wm_overlay_path = '';/*** TT font** @var string*/public $wm_font_path = '';/*** Font size (different versions of GD will either use points or pixels)** @var int*/public $wm_font_size = 17;/*** Vertical alignment: T M B** @var string*/public $wm_vrt_alignment = 'B';/*** Horizontal alignment: L R C** @var string*/public $wm_hor_alignment = 'C';/*** Padding around text** @var int*/public $wm_padding = 0;/*** Lets you push text to the right** @var int*/public $wm_hor_offset = 0;/*** Lets you push text down** @var int*/public $wm_vrt_offset = 0;/*** Text color** @var string*/protected $wm_font_color = '#ffffff';/*** Dropshadow color** @var string*/protected $wm_shadow_color = '';/*** Dropshadow distance** @var int*/public $wm_shadow_distance = 2;/*** Image opacity: 1 - 100 Only works with image** @var int*/public $wm_opacity = 50;// --------------------------------------------------------------------------// Private Vars// --------------------------------------------------------------------------/*** Source image folder** @var string*/public $source_folder = '';/*** Destination image folder** @var string*/public $dest_folder = '';/*** Image mime-type** @var string*/public $mime_type = '';/*** Original image width** @var int*/public $orig_width = '';/*** Original image height** @var int*/public $orig_height = '';/*** Image format** @var string*/public $image_type = '';/*** Size of current image** @var string*/public $size_str = '';/*** Full path to source image** @var string*/public $full_src_path = '';/*** Full path to destination image** @var string*/public $full_dst_path = '';/*** File permissions** @var int*/public $file_permissions = 0644;/*** Name of function to create image** @var string*/public $create_fnc = 'imagecreatetruecolor';/*** Name of function to copy image** @var string*/public $copy_fnc = 'imagecopyresampled';/*** Error messages** @var array*/public $error_msg = array();/*** Whether to have a drop shadow on watermark** @var bool*/protected $wm_use_drop_shadow = FALSE;/*** Whether to use truetype fonts** @var bool*/public $wm_use_truetype = FALSE;/*** Initialize Image Library** @param array $props* @return void*/public function __construct($props = array()){if (count($props) > 0){$this->initialize($props);}/*** A work-around for some improperly formatted, but* usable JPEGs; known to be produced by Samsung* smartphones' front-facing cameras.** @see https://github.com/bcit-ci/CodeIgniter/issues/4967* @see https://bugs.php.net/bug.php?id=72404*/ini_set('gd.jpeg_ignore_warning', 1);log_message('info', 'Image Lib Class Initialized');}// --------------------------------------------------------------------/*** Initialize image properties** Resets values in case this class is used in a loop** @return void*/public function clear(){$props = array('thumb_marker', 'library_path', 'source_image', 'new_image', 'width', 'height', 'rotation_angle', 'x_axis', 'y_axis', 'wm_text', 'wm_overlay_path', 'wm_font_path', 'wm_shadow_color', 'source_folder', 'dest_folder', 'mime_type', 'orig_width', 'orig_height', 'image_type', 'size_str', 'full_src_path', 'full_dst_path');foreach ($props as $val){$this->$val = '';}$this->image_library = 'gd2';$this->dynamic_output = FALSE;$this->quality = 90;$this->create_thumb = FALSE;$this->thumb_marker = '_thumb';$this->maintain_ratio = TRUE;$this->master_dim = 'auto';$this->wm_type = 'text';$this->wm_x_transp = 4;$this->wm_y_transp = 4;$this->wm_font_size = 17;$this->wm_vrt_alignment = 'B';$this->wm_hor_alignment = 'C';$this->wm_padding = 0;$this->wm_hor_offset = 0;$this->wm_vrt_offset = 0;$this->wm_font_color = '#ffffff';$this->wm_shadow_distance = 2;$this->wm_opacity = 50;$this->create_fnc = 'imagecreatetruecolor';$this->copy_fnc = 'imagecopyresampled';$this->error_msg = array();$this->wm_use_drop_shadow = FALSE;$this->wm_use_truetype = FALSE;}// --------------------------------------------------------------------/*** initialize image preferences** @param array* @return bool*/public function initialize($props = array()){// Convert array elements into class variablesif (count($props) > 0){foreach ($props as $key => $val){if (property_exists($this, $key)){if (in_array($key, array('wm_font_color', 'wm_shadow_color'), TRUE)){if (preg_match('/^#?([0-9a-f]{3}|[0-9a-f]{6})$/i', $val, $matches)){/* $matches[1] contains our hex color value, but it might be* both in the full 6-length format or the shortened 3-length* value.* We'll later need the full version, so we keep it if it's* already there and if not - we'll convert to it. We can* access string characters by their index as in an array,* so we'll do that and use concatenation to form the final* value:*/$val = (strlen($matches[1]) === 6)? '#'.$matches[1]: '#'.$matches[1][0].$matches[1][0].$matches[1][1].$matches[1][1].$matches[1][2].$matches[1][2];}else{continue;}}elseif (in_array($key, array('width', 'height'), TRUE) && ! ctype_digit((string) $val)){continue;}$this->$key = $val;}}}// Is there a source image? If not, there's no reason to continueif ($this->source_image === ''){$this->set_error('imglib_source_image_required');return FALSE;}/* Is getimagesize() available?** We use it to determine the image properties (width/height).* Note: We need to figure out how to determine image* properties using ImageMagick and NetPBM*/if ( ! function_exists('getimagesize')){$this->set_error('imglib_gd_required_for_props');return FALSE;}$this->image_library = strtolower($this->image_library);/* Set the full server path** The source image may or may not contain a path.* Either way, we'll try use realpath to generate the* full server path in order to more reliably read it.*/if (($full_source_path = realpath($this->source_image)) !== FALSE){$full_source_path = str_replace('\\', '/', $full_source_path);}else{$full_source_path = $this->source_image;}$x = explode('/', $full_source_path);$this->source_image = end($x);$this->source_folder = str_replace($this->source_image, '', $full_source_path);// Set the Image Propertiesif ( ! $this->get_image_properties($this->source_folder.$this->source_image)){return FALSE;}/** Assign the "new" image name/path** If the user has set a "new_image" name it means* we are making a copy of the source image. If not* it means we are altering the original. We'll* set the destination filename and path accordingly.*/if ($this->new_image === ''){$this->dest_image = $this->source_image;$this->dest_folder = $this->source_folder;}elseif (strpos($this->new_image, '/') === FALSE && strpos($this->new_image, '\\') === FALSE){$this->dest_image = $this->new_image;$this->dest_folder = $this->source_folder;}else{// Is there a file name?if ( ! preg_match('#\.(jpg|jpeg|gif|png)$#i', $this->new_image)){$this->dest_image = $this->source_image;$this->dest_folder = $this->new_image;}else{$x = explode('/', str_replace('\\', '/', $this->new_image));$this->dest_image = end($x);$this->dest_folder = str_replace($this->dest_image, '', $this->new_image);}$this->dest_folder = realpath($this->dest_folder).'/';}/* Compile the finalized filenames/paths** We'll create two master strings containing the* full server path to the source image and the* full server path to the destination image.* We'll also split the destination image name* so we can insert the thumbnail marker if needed.*/if ($this->create_thumb === FALSE OR $this->thumb_marker === ''){$this->thumb_marker = '';}$xp = $this->explode_name($this->dest_image);$filename = $xp['name'];$file_ext = $xp['ext'];$this->full_src_path = $this->source_folder.$this->source_image;$this->full_dst_path = $this->dest_folder.$filename.$this->thumb_marker.$file_ext;/* Should we maintain image proportions?** When creating thumbs or copies, the target width/height* might not be in correct proportion with the source* image's width/height. We'll recalculate it here.*/if ($this->maintain_ratio === TRUE && ($this->width !== 0 OR $this->height !== 0)){$this->image_reproportion();}/* Was a width and height specified?** If the destination width/height was not submitted we* will use the values from the actual file*/if ($this->width === ''){$this->width = $this->orig_width;}if ($this->height === ''){$this->height = $this->orig_height;}// Set the quality$this->quality = trim(str_replace('%', '', $this->quality));if ($this->quality === '' OR $this->quality === 0 OR ! ctype_digit($this->quality)){$this->quality = 90;}// Set the x/y coordinatesis_numeric($this->x_axis) OR $this->x_axis = 0;is_numeric($this->y_axis) OR $this->y_axis = 0;// Watermark-related Stuff...if ($this->wm_overlay_path !== ''){$this->wm_overlay_path = str_replace('\\', '/', realpath($this->wm_overlay_path));}if ($this->wm_shadow_color !== ''){$this->wm_use_drop_shadow = TRUE;}elseif ($this->wm_use_drop_shadow === TRUE && $this->wm_shadow_color === ''){$this->wm_use_drop_shadow = FALSE;}if ($this->wm_font_path !== ''){$this->wm_use_truetype = TRUE;}return TRUE;}// --------------------------------------------------------------------/*** Image Resize** This is a wrapper function that chooses the proper* resize function based on the protocol specified** @return bool*/public function resize(){$protocol = ($this->image_library === 'gd2') ? 'image_process_gd' : 'image_process_'.$this->image_library;return $this->$protocol('resize');}// --------------------------------------------------------------------/*** Image Crop** This is a wrapper function that chooses the proper* cropping function based on the protocol specified** @return bool*/public function crop(){$protocol = ($this->image_library === 'gd2') ? 'image_process_gd' : 'image_process_'.$this->image_library;return $this->$protocol('crop');}// --------------------------------------------------------------------/*** Image Rotate** This is a wrapper function that chooses the proper* rotation function based on the protocol specified** @return bool*/public function rotate(){// Allowed rotation values$degs = array(90, 180, 270, 'vrt', 'hor');if ($this->rotation_angle === '' OR ! in_array($this->rotation_angle, $degs)){$this->set_error('imglib_rotation_angle_required');return FALSE;}// Reassign the width and heightif ($this->rotation_angle === 90 OR $this->rotation_angle === 270){$this->width = $this->orig_height;$this->height = $this->orig_width;}else{$this->width = $this->orig_width;$this->height = $this->orig_height;}// Choose resizing functionif ($this->image_library === 'imagemagick' OR $this->image_library === 'netpbm'){$protocol = 'image_process_'.$this->image_library;return $this->$protocol('rotate');}return ($this->rotation_angle === 'hor' OR $this->rotation_angle === 'vrt')? $this->image_mirror_gd(): $this->image_rotate_gd();}// --------------------------------------------------------------------/*** Image Process Using GD/GD2** This function will resize or crop** @param string* @return bool*/public function image_process_gd($action = 'resize'){$v2_override = FALSE;// If the target width/height match the source, AND if the new file name is not equal to the old file name// we'll simply make a copy of the original with the new name... assuming dynamic rendering is off.if ($this->dynamic_output === FALSE && $this->orig_width === $this->width && $this->orig_height === $this->height){if ($this->source_image !== $this->new_image && @copy($this->full_src_path, $this->full_dst_path)){chmod($this->full_dst_path, $this->file_permissions);}return TRUE;}// Let's set up our values based on the actionif ($action === 'crop'){// Reassign the source width/height if cropping$this->orig_width = $this->width;$this->orig_height = $this->height;// GD 2.0 has a cropping bug so we'll test for itif ($this->gd_version() !== FALSE){$gd_version = str_replace('0', '', $this->gd_version());$v2_override = ($gd_version == 2);}}else{// If resizing the x/y axis must be zero$this->x_axis = 0;$this->y_axis = 0;}// Create the image handleif ( ! ($src_img = $this->image_create_gd())){return FALSE;}/* Create the image** Old conditional which users report cause problems with shared GD libs who report themselves as "2.0 or greater"* it appears that this is no longer the issue that it was in 2004, so we've removed it, retaining it in the comment* below should that ever prove inaccurate.** if ($this->image_library === 'gd2' && function_exists('imagecreatetruecolor') && $v2_override === FALSE)*/if ($this->image_library === 'gd2' && function_exists('imagecreatetruecolor')){$create = 'imagecreatetruecolor';$copy = 'imagecopyresampled';}else{$create = 'imagecreate';$copy = 'imagecopyresized';}$dst_img = $create($this->width, $this->height);if ($this->image_type === 3) // png we can actually preserve transparency{imagealphablending($dst_img, FALSE);imagesavealpha($dst_img, TRUE);}$copy($dst_img, $src_img, 0, 0, $this->x_axis, $this->y_axis, $this->width, $this->height, $this->orig_width, $this->orig_height);// Show the imageif ($this->dynamic_output === TRUE){$this->image_display_gd($dst_img);}elseif ( ! $this->image_save_gd($dst_img)) // Or save it{return FALSE;}// Kill the file handlesimagedestroy($dst_img);imagedestroy($src_img);chmod($this->full_dst_path, $this->file_permissions);return TRUE;}// --------------------------------------------------------------------/*** Image Process Using ImageMagick** This function will resize, crop or rotate** @param string* @return bool*/public function image_process_imagemagick($action = 'resize'){// Do we have a vaild library path?if ($this->library_path === ''){$this->set_error('imglib_libpath_invalid');return FALSE;}if ( ! preg_match('/convert$/i', $this->library_path)){$this->library_path = rtrim($this->library_path, '/').'/convert';}// Execute the command$cmd = $this->library_path.' -quality '.$this->quality;if ($action === 'crop'){$cmd .= ' -crop '.$this->width.'x'.$this->height.'+'.$this->x_axis.'+'.$this->y_axis;}elseif ($action === 'rotate'){$cmd .= ($this->rotation_angle === 'hor' OR $this->rotation_angle === 'vrt')? ' -flop': ' -rotate '.$this->rotation_angle;}else // Resize{if($this->maintain_ratio === TRUE){$cmd .= ' -resize '.$this->width.'x'.$this->height;}else{$cmd .= ' -resize '.$this->width.'x'.$this->height.'\!';}}$cmd .= ' '.escapeshellarg($this->full_src_path).' '.escapeshellarg($this->full_dst_path).' 2>&1';$retval = 1;// exec() might be disabledif (function_usable('exec')){@exec($cmd, $output, $retval);}// Did it work?if ($retval > 0){$this->set_error('imglib_image_process_failed');return FALSE;}chmod($this->full_dst_path, $this->file_permissions);return TRUE;}// --------------------------------------------------------------------/*** Image Process Using NetPBM** This function will resize, crop or rotate** @param string* @return bool*/public function image_process_netpbm($action = 'resize'){if ($this->library_path === ''){$this->set_error('imglib_libpath_invalid');return FALSE;}// Build the resizing commandswitch ($this->image_type){case 1 :$cmd_in = 'giftopnm';$cmd_out = 'ppmtogif';break;case 2 :$cmd_in = 'jpegtopnm';$cmd_out = 'ppmtojpeg';break;case 3 :$cmd_in = 'pngtopnm';$cmd_out = 'ppmtopng';break;}if ($action === 'crop'){$cmd_inner = 'pnmcut -left '.$this->x_axis.' -top '.$this->y_axis.' -width '.$this->width.' -height '.$this->height;}elseif ($action === 'rotate'){switch ($this->rotation_angle){case 90: $angle = 'r270';break;case 180: $angle = 'r180';break;case 270: $angle = 'r90';break;case 'vrt': $angle = 'tb';break;case 'hor': $angle = 'lr';break;}$cmd_inner = 'pnmflip -'.$angle.' ';}else // Resize{$cmd_inner = 'pnmscale -xysize '.$this->width.' '.$this->height;}$cmd = $this->library_path.$cmd_in.' '.escapeshellarg($this->full_src_path).' | '.$cmd_inner.' | '.$cmd_out.' > '.$this->dest_folder.'netpbm.tmp';$retval = 1;// exec() might be disabledif (function_usable('exec')){@exec($cmd, $output, $retval);}// Did it work?if ($retval > 0){$this->set_error('imglib_image_process_failed');return FALSE;}// With NetPBM we have to create a temporary image.// If you try manipulating the original it fails so// we have to rename the temp file.copy($this->dest_folder.'netpbm.tmp', $this->full_dst_path);unlink($this->dest_folder.'netpbm.tmp');chmod($this->full_dst_path, $this->file_permissions);return TRUE;}// --------------------------------------------------------------------/*** Image Rotate Using GD** @return bool*/public function image_rotate_gd(){// Create the image handleif ( ! ($src_img = $this->image_create_gd())){return FALSE;}// Set the background color// This won't work with transparent PNG files so we are// going to have to figure out how to determine the color// of the alpha channel in a future release.$white = imagecolorallocate($src_img, 255, 255, 255);// Rotate it!$dst_img = imagerotate($src_img, $this->rotation_angle, $white);// Show the imageif ($this->dynamic_output === TRUE){$this->image_display_gd($dst_img);}elseif ( ! $this->image_save_gd($dst_img)) // ... or save it{return FALSE;}// Kill the file handlesimagedestroy($dst_img);imagedestroy($src_img);chmod($this->full_dst_path, $this->file_permissions);return TRUE;}// --------------------------------------------------------------------/*** Create Mirror Image using GD** This function will flip horizontal or vertical** @return bool*/public function image_mirror_gd(){if ( ! $src_img = $this->image_create_gd()){return FALSE;}$width = $this->orig_width;$height = $this->orig_height;if ($this->rotation_angle === 'hor'){for ($i = 0; $i < $height; $i++){$left = 0;$right = $width - 1;while ($left < $right){$cl = imagecolorat($src_img, $left, $i);$cr = imagecolorat($src_img, $right, $i);imagesetpixel($src_img, $left, $i, $cr);imagesetpixel($src_img, $right, $i, $cl);$left++;$right--;}}}else{for ($i = 0; $i < $width; $i++){$top = 0;$bottom = $height - 1;while ($top < $bottom){$ct = imagecolorat($src_img, $i, $top);$cb = imagecolorat($src_img, $i, $bottom);imagesetpixel($src_img, $i, $top, $cb);imagesetpixel($src_img, $i, $bottom, $ct);$top++;$bottom--;}}}// Show the imageif ($this->dynamic_output === TRUE){$this->image_display_gd($src_img);}elseif ( ! $this->image_save_gd($src_img)) // ... or save it{return FALSE;}// Kill the file handlesimagedestroy($src_img);chmod($this->full_dst_path, $this->file_permissions);return TRUE;}// --------------------------------------------------------------------/*** Image Watermark** This is a wrapper function that chooses the type* of watermarking based on the specified preference.** @return bool*/public function watermark(){return ($this->wm_type === 'overlay') ? $this->overlay_watermark() : $this->text_watermark();}// --------------------------------------------------------------------/*** Watermark - Graphic Version** @return bool*/public function overlay_watermark(){if ( ! function_exists('imagecolortransparent')){$this->set_error('imglib_gd_required');return FALSE;}// Fetch source image properties$this->get_image_properties();// Fetch watermark image properties$props = $this->get_image_properties($this->wm_overlay_path, TRUE);$wm_img_type = $props['image_type'];$wm_width = $props['width'];$wm_height = $props['height'];// Create two image resources$wm_img = $this->image_create_gd($this->wm_overlay_path, $wm_img_type);$src_img = $this->image_create_gd($this->full_src_path);// Reverse the offset if necessary// When the image is positioned at the bottom// we don't want the vertical offset to push it// further down. We want the reverse, so we'll// invert the offset. Same with the horizontal// offset when the image is at the right$this->wm_vrt_alignment = strtoupper($this->wm_vrt_alignment[0]);$this->wm_hor_alignment = strtoupper($this->wm_hor_alignment[0]);if ($this->wm_vrt_alignment === 'B')$this->wm_vrt_offset = $this->wm_vrt_offset * -1;if ($this->wm_hor_alignment === 'R')$this->wm_hor_offset = $this->wm_hor_offset * -1;// Set the base x and y axis values$x_axis = $this->wm_hor_offset + $this->wm_padding;$y_axis = $this->wm_vrt_offset + $this->wm_padding;// Set the vertical positionif ($this->wm_vrt_alignment === 'M'){$y_axis += ($this->orig_height / 2) - ($wm_height / 2);}elseif ($this->wm_vrt_alignment === 'B'){$y_axis += $this->orig_height - $wm_height;}// Set the horizontal positionif ($this->wm_hor_alignment === 'C'){$x_axis += ($this->orig_width / 2) - ($wm_width / 2);}elseif ($this->wm_hor_alignment === 'R'){$x_axis += $this->orig_width - $wm_width;}// Build the finalized imageif ($wm_img_type === 3 && function_exists('imagealphablending')){@imagealphablending($src_img, TRUE);}// Set RGB values for text and shadow$rgba = imagecolorat($wm_img, $this->wm_x_transp, $this->wm_y_transp);$alpha = ($rgba & 0x7F000000) >> 24;// make a best guess as to whether we're dealing with an image with alpha transparency or no/binary transparencyif ($alpha > 0){// copy the image directly, the image's alpha transparency being the sole determinant of blendingimagecopy($src_img, $wm_img, $x_axis, $y_axis, 0, 0, $wm_width, $wm_height);}else{// set our RGB value from above to be transparent and merge the images with the specified opacityimagecolortransparent($wm_img, imagecolorat($wm_img, $this->wm_x_transp, $this->wm_y_transp));imagecopymerge($src_img, $wm_img, $x_axis, $y_axis, 0, 0, $wm_width, $wm_height, $this->wm_opacity);}// We can preserve transparency for PNG imagesif ($this->image_type === 3){imagealphablending($src_img, FALSE);imagesavealpha($src_img, TRUE);}// Output the imageif ($this->dynamic_output === TRUE){$this->image_display_gd($src_img);}elseif ( ! $this->image_save_gd($src_img)) // ... or save it{return FALSE;}imagedestroy($src_img);imagedestroy($wm_img);return TRUE;}// --------------------------------------------------------------------/*** Watermark - Text Version** @return bool*/public function text_watermark(){if ( ! ($src_img = $this->image_create_gd())){return FALSE;}if ($this->wm_use_truetype === TRUE && ! file_exists($this->wm_font_path)){$this->set_error('imglib_missing_font');return FALSE;}// Fetch source image properties$this->get_image_properties();// Reverse the vertical offset// When the image is positioned at the bottom// we don't want the vertical offset to push it// further down. We want the reverse, so we'll// invert the offset. Note: The horizontal// offset flips itself automaticallyif ($this->wm_vrt_alignment === 'B'){$this->wm_vrt_offset = $this->wm_vrt_offset * -1;}if ($this->wm_hor_alignment === 'R'){$this->wm_hor_offset = $this->wm_hor_offset * -1;}// Set font width and height// These are calculated differently depending on// whether we are using the true type font or notif ($this->wm_use_truetype === TRUE){if (empty($this->wm_font_size)){$this->wm_font_size = 17;}if (function_exists('imagettfbbox')){$temp = imagettfbbox($this->wm_font_size, 0, $this->wm_font_path, $this->wm_text);$temp = $temp[2] - $temp[0];$fontwidth = $temp / strlen($this->wm_text);}else{$fontwidth = $this->wm_font_size - ($this->wm_font_size / 4);}$fontheight = $this->wm_font_size;$this->wm_vrt_offset += $this->wm_font_size;}else{$fontwidth = imagefontwidth($this->wm_font_size);$fontheight = imagefontheight($this->wm_font_size);}// Set base X and Y axis values$x_axis = $this->wm_hor_offset + $this->wm_padding;$y_axis = $this->wm_vrt_offset + $this->wm_padding;if ($this->wm_use_drop_shadow === FALSE){$this->wm_shadow_distance = 0;}$this->wm_vrt_alignment = strtoupper($this->wm_vrt_alignment[0]);$this->wm_hor_alignment = strtoupper($this->wm_hor_alignment[0]);// Set vertical alignmentif ($this->wm_vrt_alignment === 'M'){$y_axis += ($this->orig_height / 2) + ($fontheight / 2);}elseif ($this->wm_vrt_alignment === 'B'){$y_axis += $this->orig_height - $fontheight - $this->wm_shadow_distance - ($fontheight / 2);}// Set horizontal alignmentif ($this->wm_hor_alignment === 'R'){$x_axis += $this->orig_width - ($fontwidth * strlen($this->wm_text)) - $this->wm_shadow_distance;}elseif ($this->wm_hor_alignment === 'C'){$x_axis += floor(($this->orig_width - ($fontwidth * strlen($this->wm_text))) / 2);}if ($this->wm_use_drop_shadow){// Offset from text$x_shad = $x_axis + $this->wm_shadow_distance;$y_shad = $y_axis + $this->wm_shadow_distance;/* Set RGB values for shadow** First character is #, so we don't really need it.* Get the rest of the string and split it into 2-length* hex values:*/$drp_color = str_split(substr($this->wm_shadow_color, 1, 6), 2);$drp_color = imagecolorclosest($src_img, hexdec($drp_color[0]), hexdec($drp_color[1]), hexdec($drp_color[2]));// Add the shadow to the source imageif ($this->wm_use_truetype){imagettftext($src_img, $this->wm_font_size, 0, $x_shad, $y_shad, $drp_color, $this->wm_font_path, $this->wm_text);}else{imagestring($src_img, $this->wm_font_size, $x_shad, $y_shad, $this->wm_text, $drp_color);}}/* Set RGB values for text** First character is #, so we don't really need it.* Get the rest of the string and split it into 2-length* hex values:*/$txt_color = str_split(substr($this->wm_font_color, 1, 6), 2);$txt_color = imagecolorclosest($src_img, hexdec($txt_color[0]), hexdec($txt_color[1]), hexdec($txt_color[2]));// Add the text to the source imageif ($this->wm_use_truetype){imagettftext($src_img, $this->wm_font_size, 0, $x_axis, $y_axis, $txt_color, $this->wm_font_path, $this->wm_text);}else{imagestring($src_img, $this->wm_font_size, $x_axis, $y_axis, $this->wm_text, $txt_color);}// We can preserve transparency for PNG imagesif ($this->image_type === 3){imagealphablending($src_img, FALSE);imagesavealpha($src_img, TRUE);}// Output the final imageif ($this->dynamic_output === TRUE){$this->image_display_gd($src_img);}else{$this->image_save_gd($src_img);}imagedestroy($src_img);return TRUE;}// --------------------------------------------------------------------/*** Create Image - GD** This simply creates an image resource handle* based on the type of image being processed** @param string* @param string* @return resource*/public function image_create_gd($path = '', $image_type = ''){if ($path === ''){$path = $this->full_src_path;}if ($image_type === ''){$image_type = $this->image_type;}switch ($image_type){case 1:if ( ! function_exists('imagecreatefromgif')){$this->set_error(array('imglib_unsupported_imagecreate', 'imglib_gif_not_supported'));return FALSE;}return imagecreatefromgif($path);case 2:if ( ! function_exists('imagecreatefromjpeg')){$this->set_error(array('imglib_unsupported_imagecreate', 'imglib_jpg_not_supported'));return FALSE;}return imagecreatefromjpeg($path);case 3:if ( ! function_exists('imagecreatefrompng')){$this->set_error(array('imglib_unsupported_imagecreate', 'imglib_png_not_supported'));return FALSE;}return imagecreatefrompng($path);default:$this->set_error(array('imglib_unsupported_imagecreate'));return FALSE;}}// --------------------------------------------------------------------/*** Write image file to disk - GD** Takes an image resource as input and writes the file* to the specified destination** @param resource* @return bool*/public function image_save_gd($resource){switch ($this->image_type){case 1:if ( ! function_exists('imagegif')){$this->set_error(array('imglib_unsupported_imagecreate', 'imglib_gif_not_supported'));return FALSE;}if ( ! @imagegif($resource, $this->full_dst_path)){$this->set_error('imglib_save_failed');return FALSE;}break;case 2:if ( ! function_exists('imagejpeg')){$this->set_error(array('imglib_unsupported_imagecreate', 'imglib_jpg_not_supported'));return FALSE;}if ( ! @imagejpeg($resource, $this->full_dst_path, $this->quality)){$this->set_error('imglib_save_failed');return FALSE;}break;case 3:if ( ! function_exists('imagepng')){$this->set_error(array('imglib_unsupported_imagecreate', 'imglib_png_not_supported'));return FALSE;}if ( ! @imagepng($resource, $this->full_dst_path)){$this->set_error('imglib_save_failed');return FALSE;}break;default:$this->set_error(array('imglib_unsupported_imagecreate'));return FALSE;break;}return TRUE;}// --------------------------------------------------------------------/*** Dynamically outputs an image** @param resource* @return void*/public function image_display_gd($resource){header('Content-Disposition: filename='.$this->source_image.';');header('Content-Type: '.$this->mime_type);header('Content-Transfer-Encoding: binary');header('Last-Modified: '.gmdate('D, d M Y H:i:s', time()).' GMT');switch ($this->image_type){case 1 : imagegif($resource);break;case 2 : imagejpeg($resource, NULL, $this->quality);break;case 3 : imagepng($resource);break;default: echo 'Unable to display the image';break;}}// --------------------------------------------------------------------/*** Re-proportion Image Width/Height** When creating thumbs, the desired width/height* can end up warping the image due to an incorrect* ratio between the full-sized image and the thumb.** This function lets us re-proportion the width/height* if users choose to maintain the aspect ratio when resizing.** @return void*/public function image_reproportion(){if (($this->width === 0 && $this->height === 0) OR $this->orig_width === 0 OR $this->orig_height === 0OR ( ! ctype_digit((string) $this->width) && ! ctype_digit((string) $this->height))OR ! ctype_digit((string) $this->orig_width) OR ! ctype_digit((string) $this->orig_height)){return;}// Sanitize$this->width = (int) $this->width;$this->height = (int) $this->height;if ($this->master_dim !== 'width' && $this->master_dim !== 'height'){if ($this->width > 0 && $this->height > 0){$this->master_dim = ((($this->orig_height/$this->orig_width) - ($this->height/$this->width)) < 0)? 'width' : 'height';}else{$this->master_dim = ($this->height === 0) ? 'width' : 'height';}}elseif (($this->master_dim === 'width' && $this->width === 0)OR ($this->master_dim === 'height' && $this->height === 0)){return;}if ($this->master_dim === 'width'){$this->height = (int) ceil($this->width*$this->orig_height/$this->orig_width);}else{$this->width = (int) ceil($this->orig_width*$this->height/$this->orig_height);}}// --------------------------------------------------------------------/*** Get image properties** A helper function that gets info about the file** @param string* @param bool* @return mixed*/public function get_image_properties($path = '', $return = FALSE){// For now we require GD but we should// find a way to determine this using IM or NetPBMif ($path === ''){$path = $this->full_src_path;}if ( ! file_exists($path)){$this->set_error('imglib_invalid_path');return FALSE;}$vals = getimagesize($path);if ($vals === FALSE){$this->set_error('imglib_invalid_image');return FALSE;}$types = array(1 => 'gif', 2 => 'jpeg', 3 => 'png');$mime = isset($types[$vals[2]]) ? 'image/'.$types[$vals[2]] : 'image/jpg';if ($return === TRUE){return array('width' => $vals[0],'height' => $vals[1],'image_type' => $vals[2],'size_str' => $vals[3],'mime_type' => $mime);}$this->orig_width = $vals[0];$this->orig_height = $vals[1];$this->image_type = $vals[2];$this->size_str = $vals[3];$this->mime_type = $mime;return TRUE;}// --------------------------------------------------------------------/*** Size calculator** This function takes a known width x height and* recalculates it to a new size. Only one* new variable needs to be known** $props = array(* 'width' => $width,* 'height' => $height,* 'new_width' => 40,* 'new_height' => ''* );** @param array* @return array*/public function size_calculator($vals){if ( ! is_array($vals)){return;}$allowed = array('new_width', 'new_height', 'width', 'height');foreach ($allowed as $item){if (empty($vals[$item])){$vals[$item] = 0;}}if ($vals['width'] === 0 OR $vals['height'] === 0){return $vals;}if ($vals['new_width'] === 0){$vals['new_width'] = ceil($vals['width']*$vals['new_height']/$vals['height']);}elseif ($vals['new_height'] === 0){$vals['new_height'] = ceil($vals['new_width']*$vals['height']/$vals['width']);}return $vals;}// --------------------------------------------------------------------/*** Explode source_image** This is a helper function that extracts the extension* from the source_image. This function lets us deal with* source_images with multiple periods, like: my.cool.jpg* It returns an associative array with two elements:* $array['ext'] = '.jpg';* $array['name'] = 'my.cool';** @param array* @return array*/public function explode_name($source_image){$ext = strrchr($source_image, '.');$name = ($ext === FALSE) ? $source_image : substr($source_image, 0, -strlen($ext));return array('ext' => $ext, 'name' => $name);}// --------------------------------------------------------------------/*** Is GD Installed?** @return bool*/public function gd_loaded(){if ( ! extension_loaded('gd')){/* As it is stated in the PHP manual, dl() is not always available* and even if so - it could generate an E_WARNING message on failure*/return (function_exists('dl') && @dl('gd.so'));}return TRUE;}// --------------------------------------------------------------------/*** Get GD version** @return mixed*/public function gd_version(){if (function_exists('gd_info')){$gd_version = @gd_info();return preg_replace('/\D/', '', $gd_version['GD Version']);}return FALSE;}// --------------------------------------------------------------------/*** Set error message** @param string* @return void*/public function set_error($msg){$CI =& get_instance();$CI->lang->load('imglib');if (is_array($msg)){foreach ($msg as $val){$msg = ($CI->lang->line($val) === FALSE) ? $val : $CI->lang->line($val);$this->error_msg[] = $msg;log_message('error', $msg);}}else{$msg = ($CI->lang->line($msg) === FALSE) ? $msg : $CI->lang->line($msg);$this->error_msg[] = $msg;log_message('error', $msg);}}// --------------------------------------------------------------------/*** Show error messages** @param string* @param string* @return string*/public function display_errors($open = '<p>', $close = '</p>'){return (count($this->error_msg) > 0) ? $open.implode($close.$open, $this->error_msg).$close : '';}}