1843 lines
42 KiB
PHP
1843 lines
42 KiB
PHP
<?php
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/**
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* CodeIgniter
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*
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* An open source application development framework for PHP
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*
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* This content is released under the MIT License (MIT)
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*
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* Copyright (c) 2014 - 2019, British Columbia Institute of Technology
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*
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* @package CodeIgniter
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* @author EllisLab Dev Team
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* @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)
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* @copyright Copyright (c) 2014 - 2019, British Columbia Institute of Technology (https://bcit.ca/)
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* @license https://opensource.org/licenses/MIT MIT License
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* @link https://codeigniter.com
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* @since Version 1.0.0
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* @filesource
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*/
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defined('BASEPATH') OR exit('No direct script access allowed');
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/**
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* Image Manipulation class
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*
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* @package CodeIgniter
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* @subpackage Libraries
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* @category Image_lib
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* @author EllisLab Dev Team
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* @link https://codeigniter.com/user_guide/libraries/image_lib.html
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*/
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class CI_Image_lib {
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/**
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* PHP extension/library to use for image manipulation
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* Can be: imagemagick, netpbm, gd, gd2
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*
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* @var string
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*/
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public $image_library = 'gd2';
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/**
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* Path to the graphic library (if applicable)
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*
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* @var string
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*/
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public $library_path = '';
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/**
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* Whether to send to browser or write to disk
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*
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* @var bool
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*/
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public $dynamic_output = FALSE;
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/**
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* Path to original image
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*
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* @var string
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*/
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public $source_image = '';
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/**
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* Path to the modified image
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*
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* @var string
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*/
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public $new_image = '';
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/**
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* Image width
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*
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* @var int
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*/
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public $width = '';
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/**
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* Image height
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*
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* @var int
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*/
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public $height = '';
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/**
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* Quality percentage of new image
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*
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* @var int
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*/
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public $quality = 90;
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/**
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* Whether to create a thumbnail
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*
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* @var bool
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*/
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public $create_thumb = FALSE;
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/**
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* String to add to thumbnail version of image
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*
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* @var string
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*/
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public $thumb_marker = '_thumb';
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/**
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* Whether to maintain aspect ratio when resizing or use hard values
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*
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* @var bool
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*/
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public $maintain_ratio = TRUE;
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/**
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* auto, height, or width. Determines what to use as the master dimension
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*
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* @var string
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*/
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public $master_dim = 'auto';
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/**
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* Angle at to rotate image
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*
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* @var string
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*/
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public $rotation_angle = '';
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/**
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* X Coordinate for manipulation of the current image
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*
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* @var int
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*/
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public $x_axis = '';
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/**
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* Y Coordinate for manipulation of the current image
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*
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* @var int
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*/
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public $y_axis = '';
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// --------------------------------------------------------------------------
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// Watermark Vars
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// --------------------------------------------------------------------------
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/**
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* Watermark text if graphic is not used
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*
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* @var string
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*/
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public $wm_text = '';
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/**
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* Type of watermarking. Options: text/overlay
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*
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* @var string
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*/
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public $wm_type = 'text';
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/**
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* Default transparency for watermark
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*
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* @var int
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*/
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public $wm_x_transp = 4;
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/**
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* Default transparency for watermark
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*
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* @var int
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*/
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public $wm_y_transp = 4;
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/**
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* Watermark image path
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*
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* @var string
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*/
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public $wm_overlay_path = '';
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/**
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* TT font
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*
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* @var string
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*/
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public $wm_font_path = '';
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/**
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* Font size (different versions of GD will either use points or pixels)
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*
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* @var int
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*/
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public $wm_font_size = 17;
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/**
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* Vertical alignment: T M B
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*
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* @var string
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*/
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public $wm_vrt_alignment = 'B';
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/**
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* Horizontal alignment: L R C
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*
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* @var string
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*/
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public $wm_hor_alignment = 'C';
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/**
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* Padding around text
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*
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* @var int
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*/
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public $wm_padding = 0;
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/**
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* Lets you push text to the right
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*
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* @var int
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*/
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public $wm_hor_offset = 0;
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/**
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* Lets you push text down
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*
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* @var int
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*/
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public $wm_vrt_offset = 0;
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/**
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* Text color
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*
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* @var string
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*/
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protected $wm_font_color = '#ffffff';
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/**
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* Dropshadow color
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*
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* @var string
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*/
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protected $wm_shadow_color = '';
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/**
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* Dropshadow distance
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*
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* @var int
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*/
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public $wm_shadow_distance = 2;
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/**
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* Image opacity: 1 - 100 Only works with image
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*
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* @var int
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*/
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public $wm_opacity = 50;
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// --------------------------------------------------------------------------
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// Private Vars
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// --------------------------------------------------------------------------
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/**
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* Source image folder
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*
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* @var string
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*/
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public $source_folder = '';
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/**
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* Destination image folder
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*
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* @var string
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*/
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public $dest_folder = '';
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/**
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* Image mime-type
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*
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* @var string
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*/
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public $mime_type = '';
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/**
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* Original image width
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*
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* @var int
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*/
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public $orig_width = '';
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/**
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* Original image height
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*
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* @var int
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*/
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public $orig_height = '';
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/**
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* Image format
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*
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* @var string
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*/
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public $image_type = '';
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/**
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* Size of current image
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*
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* @var string
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*/
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public $size_str = '';
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/**
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* Full path to source image
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*
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* @var string
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*/
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public $full_src_path = '';
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/**
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* Full path to destination image
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*
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* @var string
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*/
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public $full_dst_path = '';
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/**
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* File permissions
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*
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* @var int
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*/
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public $file_permissions = 0644;
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/**
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* Name of function to create image
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*
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* @var string
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*/
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public $create_fnc = 'imagecreatetruecolor';
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/**
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* Name of function to copy image
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*
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* @var string
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*/
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public $copy_fnc = 'imagecopyresampled';
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/**
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* Error messages
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*
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* @var array
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*/
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public $error_msg = array();
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/**
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* Whether to have a drop shadow on watermark
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*
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* @var bool
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*/
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protected $wm_use_drop_shadow = FALSE;
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/**
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* Whether to use truetype fonts
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*
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* @var bool
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*/
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public $wm_use_truetype = FALSE;
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/**
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* Initialize Image Library
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*
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* @param array $props
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* @return void
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*/
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public function __construct($props = array())
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{
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if (count($props) > 0)
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{
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$this->initialize($props);
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}
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/**
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* A work-around for some improperly formatted, but
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* usable JPEGs; known to be produced by Samsung
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* smartphones' front-facing cameras.
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*
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* @see https://github.com/bcit-ci/CodeIgniter/issues/4967
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* @see https://bugs.php.net/bug.php?id=72404
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*/
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ini_set('gd.jpeg_ignore_warning', 1);
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log_message('info', 'Image Lib Class Initialized');
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}
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// --------------------------------------------------------------------
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/**
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* Initialize image properties
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*
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* Resets values in case this class is used in a loop
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*
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* @return void
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*/
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public function clear()
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{
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$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');
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foreach ($props as $val)
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{
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$this->$val = '';
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}
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$this->image_library = 'gd2';
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$this->dynamic_output = FALSE;
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$this->quality = 90;
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$this->create_thumb = FALSE;
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$this->thumb_marker = '_thumb';
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$this->maintain_ratio = TRUE;
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$this->master_dim = 'auto';
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$this->wm_type = 'text';
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$this->wm_x_transp = 4;
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$this->wm_y_transp = 4;
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$this->wm_font_size = 17;
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$this->wm_vrt_alignment = 'B';
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$this->wm_hor_alignment = 'C';
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$this->wm_padding = 0;
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$this->wm_hor_offset = 0;
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$this->wm_vrt_offset = 0;
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$this->wm_font_color = '#ffffff';
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$this->wm_shadow_distance = 2;
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$this->wm_opacity = 50;
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$this->create_fnc = 'imagecreatetruecolor';
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$this->copy_fnc = 'imagecopyresampled';
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$this->error_msg = array();
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$this->wm_use_drop_shadow = FALSE;
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$this->wm_use_truetype = FALSE;
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}
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// --------------------------------------------------------------------
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/**
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* initialize image preferences
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*
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* @param array
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* @return bool
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*/
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public function initialize($props = array())
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{
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// Convert array elements into class variables
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if (count($props) > 0)
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{
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foreach ($props as $key => $val)
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{
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if (property_exists($this, $key))
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{
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if (in_array($key, array('wm_font_color', 'wm_shadow_color'), TRUE))
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{
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if (preg_match('/^#?([0-9a-f]{3}|[0-9a-f]{6})$/i', $val, $matches))
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{
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/* $matches[1] contains our hex color value, but it might be
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* both in the full 6-length format or the shortened 3-length
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* value.
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* We'll later need the full version, so we keep it if it's
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* already there and if not - we'll convert to it. We can
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* access string characters by their index as in an array,
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* so we'll do that and use concatenation to form the final
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* value:
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*/
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$val = (strlen($matches[1]) === 6)
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? '#'.$matches[1]
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: '#'.$matches[1][0].$matches[1][0].$matches[1][1].$matches[1][1].$matches[1][2].$matches[1][2];
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}
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else
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{
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continue;
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}
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}
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elseif (in_array($key, array('width', 'height'), TRUE) && ! ctype_digit((string) $val))
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{
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continue;
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}
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$this->$key = $val;
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}
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}
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}
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// Is there a source image? If not, there's no reason to continue
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if ($this->source_image === '')
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{
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$this->set_error('imglib_source_image_required');
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return FALSE;
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}
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/* Is getimagesize() available?
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*
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* We use it to determine the image properties (width/height).
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* Note: We need to figure out how to determine image
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* properties using ImageMagick and NetPBM
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*/
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if ( ! function_exists('getimagesize'))
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{
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$this->set_error('imglib_gd_required_for_props');
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return FALSE;
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}
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$this->image_library = strtolower($this->image_library);
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/* Set the full server path
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*
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* The source image may or may not contain a path.
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* Either way, we'll try use realpath to generate the
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* full server path in order to more reliably read it.
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*/
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if (($full_source_path = realpath($this->source_image)) !== FALSE)
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{
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$full_source_path = str_replace('\\', '/', $full_source_path);
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}
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else
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{
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$full_source_path = $this->source_image;
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}
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$x = explode('/', $full_source_path);
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$this->source_image = end($x);
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$this->source_folder = str_replace($this->source_image, '', $full_source_path);
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// Set the Image Properties
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if ( ! $this->get_image_properties($this->source_folder.$this->source_image))
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{
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return FALSE;
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}
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/*
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* Assign the "new" image name/path
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*
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* If the user has set a "new_image" name it means
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* we are making a copy of the source image. If not
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* it means we are altering the original. We'll
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* set the destination filename and path accordingly.
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*/
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if ($this->new_image === '')
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{
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$this->dest_image = $this->source_image;
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$this->dest_folder = $this->source_folder;
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}
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elseif (strpos($this->new_image, '/') === FALSE && strpos($this->new_image, '\\') === FALSE)
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{
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$this->dest_image = $this->new_image;
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$this->dest_folder = $this->source_folder;
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}
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else
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{
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// Is there a file name?
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if ( ! preg_match('#\.(jpg|jpeg|gif|png)$#i', $this->new_image))
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{
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$this->dest_image = $this->source_image;
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$this->dest_folder = $this->new_image;
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}
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else
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{
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$x = explode('/', str_replace('\\', '/', $this->new_image));
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$this->dest_image = end($x);
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$this->dest_folder = str_replace($this->dest_image, '', $this->new_image);
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}
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$this->dest_folder = realpath($this->dest_folder).'/';
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}
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/* Compile the finalized filenames/paths
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*
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* We'll create two master strings containing the
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* full server path to the source image and the
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* full server path to the destination image.
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* We'll also split the destination image name
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* so we can insert the thumbnail marker if needed.
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*/
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if ($this->create_thumb === FALSE OR $this->thumb_marker === '')
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{
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$this->thumb_marker = '';
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}
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$xp = $this->explode_name($this->dest_image);
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$filename = $xp['name'];
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$file_ext = $xp['ext'];
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$this->full_src_path = $this->source_folder.$this->source_image;
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$this->full_dst_path = $this->dest_folder.$filename.$this->thumb_marker.$file_ext;
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/* Should we maintain image proportions?
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*
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* When creating thumbs or copies, the target width/height
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* might not be in correct proportion with the source
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* image's width/height. We'll recalculate it here.
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*/
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if ($this->maintain_ratio === TRUE && ($this->width !== 0 OR $this->height !== 0))
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{
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$this->image_reproportion();
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}
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/* Was a width and height specified?
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*
|
|
* 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))
|
|
{
|
|
$this->quality = 90;
|
|
}
|
|
|
|
// Set the x/y coordinates
|
|
is_numeric($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))
|
|
{
|
|
$this->set_error('imglib_rotation_angle_required');
|
|
return FALSE;
|
|
}
|
|
|
|
// Reassign the width and height
|
|
if ($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 = $this->orig_height;
|
|
}
|
|
|
|
// Choose resizing function
|
|
if ($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, $this->file_permissions);
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
// Let's set up our values based on the action
|
|
if ($action === 'crop')
|
|
{
|
|
// Reassign the source width/height if cropping
|
|
$this->orig_width = $this->width;
|
|
$this->orig_height = $this->height;
|
|
|
|
// GD 2.0 has a cropping bug so we'll test for it
|
|
if ($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;
|
|
$this->y_axis = 0;
|
|
}
|
|
|
|
// Create the image handle
|
|
if ( ! ($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, $this->orig_height);
|
|
|
|
// Show the image
|
|
if ($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 handles
|
|
imagedestroy($dst_img);
|
|
imagedestroy($src_img);
|
|
|
|
if ($this->dynamic_output !== TRUE)
|
|
{
|
|
chmod($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';
|
|
|
|
$retval = 1;
|
|
// exec() might be disabled
|
|
if (function_usable('exec'))
|
|
{
|
|
@exec($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 === '')
|
|
{
|
|
$this->set_error('imglib_libpath_invalid');
|
|
return FALSE;
|
|
}
|
|
|
|
// Build the resizing command
|
|
switch ($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';
|
|
|
|
$retval = 1;
|
|
// exec() might be disabled
|
|
if (function_usable('exec'))
|
|
{
|
|
@exec($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, $this->file_permissions);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Image Rotate Using GD
|
|
*
|
|
* @return bool
|
|
*/
|
|
public function image_rotate_gd()
|
|
{
|
|
// Create the image handle
|
|
if ( ! ($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, $white);
|
|
|
|
// Show the image
|
|
if ($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 handles
|
|
imagedestroy($dst_img);
|
|
imagedestroy($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++;
|
|
$bottom--;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Show the image
|
|
if ($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 handles
|
|
imagedestroy($src_img);
|
|
|
|
chmod($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 + $this->wm_padding;
|
|
|
|
// Set the vertical position
|
|
if ($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 - $wm_height;
|
|
}
|
|
|
|
// Set the horizontal position
|
|
if ($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 - $wm_width;
|
|
}
|
|
|
|
// Build the finalized image
|
|
if ($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 transparency
|
|
if ($alpha > 0)
|
|
{
|
|
// copy the image directly, the image's alpha transparency being the sole determinant of blending
|
|
imagecopy($src_img, $wm_img, $x_axis, $y_axis, 0, 0, $wm_width, $wm_height);
|
|
}
|
|
else
|
|
{
|
|
// set our RGB value from above to be transparent and merge the images with the specified opacity
|
|
imagecolortransparent($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, $this->wm_opacity);
|
|
}
|
|
|
|
// We can preserve transparency for PNG images
|
|
if ($this->image_type === 3)
|
|
{
|
|
imagealphablending($src_img, FALSE);
|
|
imagesavealpha($src_img, TRUE);
|
|
}
|
|
|
|
// Output the image
|
|
if ($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
|
|
$this->get_image_properties();
|
|
|
|
// Reverse the vertical offset
|
|
// When the image is positioned at the bottom
|
|
// we don't want the vertical offset to push it
|
|
// further down. We want the reverse, so we'll
|
|
// invert the offset. Note: The horizontal
|
|
// offset flips itself automatically
|
|
|
|
if ($this->wm_vrt_alignment === 'B')
|
|
{
|
|
$this->wm_vrt_offset = $this->wm_vrt_offset * -1;
|
|
}
|
|
|
|
if ($this->wm_hor_alignment === 'R')
|
|
{
|
|
$this->wm_hor_offset = $this->wm_hor_offset * -1;
|
|
}
|
|
|
|
// Set font width and height
|
|
// These are calculated differently depending on
|
|
// whether we are using the true type font or not
|
|
if ($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 alignment
|
|
if ($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 alignment
|
|
if ($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($drp_color[2]));
|
|
|
|
// Add the shadow to the source image
|
|
if ($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($txt_color[2]));
|
|
|
|
// Add the text to the source image
|
|
if ($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, $txt_color);
|
|
}
|
|
|
|
// We can preserve transparency for PNG images
|
|
if ($this->image_type === 3)
|
|
{
|
|
imagealphablending($src_img, FALSE);
|
|
imagesavealpha($src_img, TRUE);
|
|
}
|
|
|
|
// Output the final image
|
|
if ($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 === 0
|
|
OR ( ! 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 = '', $return = FALSE)
|
|
{
|
|
// For now we require GD but we should
|
|
// find a way to determine this using IM or NetPBM
|
|
|
|
if ($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 : '';
|
|
}
|
|
|
|
}
|