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<?php |
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/** |
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* Methods used with the {@link resize()} method. |
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*/ |
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define('ZEBRA_IMAGE_BOXED', 0); |
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define('ZEBRA_IMAGE_NOT_BOXED', 1); |
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define('ZEBRA_IMAGE_CROP_TOPLEFT', 2); |
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define('ZEBRA_IMAGE_CROP_TOPCENTER', 3); |
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define('ZEBRA_IMAGE_CROP_TOPRIGHT', 4); |
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define('ZEBRA_IMAGE_CROP_MIDDLELEFT', 5); |
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define('ZEBRA_IMAGE_CROP_CENTER', 6); |
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define('ZEBRA_IMAGE_CROP_MIDDLERIGHT', 7); |
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define('ZEBRA_IMAGE_CROP_BOTTOMLEFT', 8); |
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define('ZEBRA_IMAGE_CROP_BOTTOMCENTER', 9); |
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define('ZEBRA_IMAGE_CROP_BOTTOMRIGHT', 10); |
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// this enables handling of partially broken JPEG files without warnings/errors |
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ini_set('gd.jpeg_ignore_warning', true); |
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/** |
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* A compact (one-file only) and lightweight PHP library for image manipulation providing methods for performing several |
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* types of image manipulation operations and applying filters to images. |
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* |
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* Read more {@link https://github.com/stefangabos/Zebra_Image/ here} |
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* |
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* @author Stefan Gabos <[email protected]> |
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* @version 2.2.7 (last revision: August 21, 2017) |
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* @copyright (c) 2006 - 2017 Stefan Gabos |
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* @license http://www.gnu.org/licenses/lgpl-3.0.txt GNU LESSER GENERAL PUBLIC LICENSE |
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* @package Zebra_Image |
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*/ |
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class Zebra_Image { |
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/** |
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* Indicates the file system permissions to be set for newly created images. |
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* |
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* Better is to leave this setting as it is. |
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* |
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* If you know what you are doing, here is how you can calculate the permission levels: |
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* |
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* - 400 Owner Read |
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* - 200 Owner Write |
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* - 100 Owner Execute |
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* - 40 Group Read |
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* - 20 Group Write |
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* - 10 Group Execute |
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* - 4 Global Read |
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* - 2 Global Write |
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* - 1 Global Execute |
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* |
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* Default is 0755 |
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* |
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* @var integer |
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*/ |
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public $chmod_value; |
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/** |
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* If set to FALSE, images having both width and height smaller than the required width and height, will be left |
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* untouched ({@link jpeg_quality} and {@link png_compression} will still apply). |
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* |
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* Available only for the {@link resize()} method |
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* |
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* Default is TRUE |
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* |
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* @var boolean |
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*/ |
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public $enlarge_smaller_images; |
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/** |
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* In case of an error read this property's value to see the error's code. |
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* |
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* Possible error codes are: |
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* |
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* - 1: source file could not be found |
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* - 2: source file is not readable |
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* - 3: could not write target file |
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* - 4: unsupported source file format |
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* - 5: unsupported target file format |
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* - 6: GD library version does not support target file format |
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* - 7: GD library is not installed! |
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* - 8: "chmod" command is disabled via configuration |
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* - 9: "exif_read_data" function is not available |
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* |
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* Default is 0 (no error). |
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* |
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* @var integer |
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*/ |
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public $error; |
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/** |
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* If set to TRUE, JPEG images will be auto-rotated according to the {@link http://keyj.emphy.de/exif-orientation-rant/ Exif Orientation Tag} |
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* so that they are always shown correctly. |
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* |
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* <samp>If you set this to TRUE you must also enable exif-support with --enable-exif. Windows users must enable both |
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* the php_mbstring.dll and php_exif.dll DLL's in php.ini. The php_mbstring.dll DLL must be loaded before the |
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* php_exif.dll DLL so adjust your php.ini accordingly. See {@link http://php.net/manual/en/exif.installation.php the PHP manual}</samp> |
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* |
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* Default is FALSE |
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* |
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* @since 2.2.4 |
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* |
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* @var boolean |
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*/ |
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public $auto_handle_exif_orientation; |
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/** |
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* Indicates the quality of the output image (better quality means bigger file size). |
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* |
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* Used only if the file at {@link target_path} is a JPG/JPEG image. |
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* |
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* Range is 0 - 100 |
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* |
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* Default is 85 |
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* |
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* @var integer |
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*/ |
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public $jpeg_quality; |
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/** |
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* Indicates the compression level of the output image (lower compression means bigger file size). |
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* |
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* Available only if PHP version is 5.1.2+, and only if the file at {@link target_path} is a PNG image. It will be |
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* ignored otherwise. |
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* |
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* Range is 0 - 9 |
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* |
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* Default is 9 |
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* |
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* @since 2.2 |
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* |
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* @var integer |
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*/ |
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public $png_compression; |
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/** |
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* Specifies whether, upon resizing, images should preserve their aspect ratio. |
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* |
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* Available only for the {@link resize()} method |
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* |
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* Default is TRUE |
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* |
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* @var boolean |
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*/ |
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public $preserve_aspect_ratio; |
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/** |
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* Indicates whether a target files should preserve the source file's date/time. |
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* |
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* Default is TRUE |
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* |
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* @since 1.0.4 |
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* |
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* @var boolean |
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*/ |
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public $preserve_time; |
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/** |
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* Indicates whether the target image should have a "sharpen" filter applied to it. |
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* |
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* Can be very useful when creating thumbnails and should be used only when creating thumbnails. |
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* |
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* <i>The sharpen filter relies on the "imageconvolution" PHP function which is available only for PHP version |
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* 5.1.0+, and will leave the images unaltered for older versions!</i> |
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* |
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* Default is FALSE |
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* |
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* @since 2.2 |
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* |
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* @var boolean |
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*/ |
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public $sharpen_images; |
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/** |
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* Path to an image file to apply the transformations to. |
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* |
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* Supported file types are <b>GIF</b>, <b>PNG</b> and <b>JPEG</b>. |
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* |
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* @var string |
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*/ |
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public $source_path; |
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/** |
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* Path (including file name) to where to save the transformed image. |
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* |
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* <i>Can be a different than {@link source_path} - the type of the transformed image will be as indicated by the |
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* file's extension (supported file types are GIF, PNG and JPEG)</i>. |
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* |
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* @var string |
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*/ |
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public $target_path; |
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/** |
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* Constructor of the class. |
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* |
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* Initializes the class and the default properties |
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* |
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* @return void |
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*/ |
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public function __construct() { |
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// set default values for properties |
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$this->chmod_value = 0755; |
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$this->error = 0; |
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$this->jpeg_quality = 85; |
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$this->png_compression = 9; |
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$this->preserve_aspect_ratio = $this->preserve_time = $this->enlarge_smaller_images = true; |
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$this->sharpen_images = $this->auto_handle_exif_orientation = false; |
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$this->source_path = $this->target_path = ''; |
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} |
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/** |
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* Applies one or more filters to the image given as {@link source_path} and outputs it as the file specified as |
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* {@link target_path}. |
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* |
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* <samp>This method is available only if the {@link http://php.net/manual/en/function.imagefilter.php imagefilter} |
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* function is available (available from PHP 5+), and will leave images unaltered otherwise.</samp> |
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* |
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* <code> |
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* // include the Zebra_Image library |
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* require 'path/to/Zebra_Image.php'; |
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* |
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* // instantiate the class |
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* $img = new Zebra_Image(); |
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* |
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* // a source image |
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* $img->source_path = 'path/to/source.ext'; |
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* |
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* // path to where should the resulting image be saved |
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* // note that by simply setting a different extension to the file will |
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* // instruct the script to create an image of that particular type |
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* $img->target_path = 'path/to/target.ext'; |
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* |
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* // apply the "grayscale" filter |
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* $img->apply_filter('grayscale'); |
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* |
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* // apply the "contrast" filter |
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* $img->apply_filter('contrast', -20); |
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* </code> |
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* |
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* You can also apply multiple filters at once. In this case, the method requires a single argument, an array of |
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* arrays, containing the filters and associated arguments, where applicable: |
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* |
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* <code> |
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* // create a sepia effect |
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* // note how we're applying multiple filters at once |
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* // each filter is in its own array |
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* $img->apply_filter(array( |
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* |
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* // first we apply the "grayscale" filter |
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* array('grayscale'), |
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* |
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* // then we apply the "colorize" filter with 90, 60, 40 as |
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* // the values for red, green and blue |
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* array('colorize', 90, 60, 40), |
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* |
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* )); |
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* </code> |
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* |
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* @param string $filter The (case-insensitive) name of the filter to apply. Can be one of the following: |
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* |
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* - <b>brightness</b> - changes the brightness of the image; use <b>arg1</b> |
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* to set the level of brightness; the range of brightness |
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* is -255 to 255; |
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* - <b>colorize</b> - adds (subtracts) specified RGB values to each pixel; |
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* use <b>arg1</b>, <b>arg2</b> and <b>arg3</b> in the |
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* form of red, green, blue and <b>arg4</b> for the alpha |
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* channel. the range for each color is -255 to 255 and |
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* 0 to 127 for alpha; <i>alpha support is available only |
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* for PHP 5.2.5+</i>; |
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* - <b>contrast</b> - changes the contrast of the image; use <b>arg1</b> |
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* to set the level of contrast; the range of contrast |
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* is -100 to 100; |
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* - <b>gausian_blur</b> - blurs the image using the Gaussian method; |
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* - <b>grayscale</b> - converts the image into grayscale; |
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* - <b>edgedetect</b> - uses edge detection to highlight the edges in the image; |
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* - <b>emboss</b> - embosses the image; |
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* - <b>mean_removal</b> - uses mean removal to achieve a "sketchy" effect; |
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* - <b>negate</b> - reverses all the colors of the image; |
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* - <b>pixelate</b> - applies pixelation effect to the image, use <b>arg1</b> |
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* to set the block size and <b>arg2</b> to set the |
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* pixelation effect mode; <i>this filter is available |
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* only for PHP 5.3.0+</i>; |
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* - <b>selective_blur</b> - blurs the image; |
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* - <b>smooth</b> - makes the image smoother. Use <b>arg1</b> to set the |
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* level of smoothness. applies a 9-cell convolution matrix |
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* where center pixel has the weight of <b>arg1</b> and |
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* others weight of 1.0. the result is normalized by dividing |
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* the sum with <b>arg1</b> + 8.0 (sum of the matrix). |
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* any float is accepted; |
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* |
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* @param mixed $arg1 Used by the following filters: |
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* - <b>brightness</b> - sets the brightness level (-255 to 255) |
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* - <b>contrast</b> - sets the contrast level (-100 to 100) |
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* - <b>colorize</b> - sets the value of the red component (-255 to 255) |
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* - <b>smooth</b> - sets the smoothness level |
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* - <b>pixelate</b> - sets the block size, in pixels |
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* |
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* @param mixed $arg2 Used by the following filters: |
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* - <b>colorize</b> - sets the value of the green component (-255 to 255) |
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* - <b>pixelate</b> - whether to use advanced pixelation effect or not (defaults to FALSE). |
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309
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* |
|
310
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|
|
* @param mixed $arg3 Used by the following filters: |
|
311
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* - <b>colorize</b> - sets the value of the blue component (-255 to 255) |
|
312
|
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* |
|
313
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* @param mixed $arg4 Used by the following filters: |
|
314
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|
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* - <b>colorize</b> - alpha channel; a value between 0 and 127. 0 indicates |
|
315
|
|
|
* completely opaque while 127 indicates completely |
|
316
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|
|
* transparent. |
|
317
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|
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* |
|
318
|
|
|
* @since 2.2.2 |
|
319
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|
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* |
|
320
|
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|
* @return boolean Returns TRUE on success or FALSE on error. |
|
321
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* |
|
322
|
|
|
* If {@link http://php.net/manual/en/function.imagefilter.php imagefilter} is not |
|
323
|
|
|
* available the method will return FALSE without setting an {@link error} code. |
|
324
|
|
|
* |
|
325
|
|
|
* If the requested filter doesn't exist, or invalid arguments are passed, the method |
|
326
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|
|
* will trigger a warning. |
|
327
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|
|
* |
|
328
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|
|
* If FALSE is returned and you are sure that |
|
329
|
|
|
* {@link http://php.net/manual/en/function.imagefilter.php imagefilter} exists and that |
|
330
|
|
|
* the requested filter is valid, check the {@link error} property to see the error code. |
|
331
|
|
|
*/ |
|
332
|
|
|
public function apply_filter($filter, $arg1 = '', $arg2 = '', $arg3 = '', $arg4 = '') { |
|
333
|
|
|
|
|
334
|
|
|
// if "imagefilter" function exists and the requested filter exists |
|
335
|
|
|
if (function_exists('imagefilter')) |
|
336
|
|
|
|
|
337
|
|
|
// if image resource was successfully created |
|
338
|
|
|
if ($this->_create_from_source()) { |
|
339
|
|
|
|
|
340
|
|
|
// prepare the target image |
|
341
|
|
|
$target_identifier = $this->_prepare_image($this->source_width, $this->source_height, -1); |
|
342
|
|
|
|
|
343
|
|
|
// copy the original image |
|
344
|
|
|
imagecopyresampled( |
|
345
|
|
|
|
|
346
|
|
|
$target_identifier, |
|
347
|
|
|
$this->source_identifier, |
|
348
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|
|
0, |
|
349
|
|
|
0, |
|
350
|
|
|
0, |
|
351
|
|
|
0, |
|
352
|
|
|
$this->source_width, |
|
353
|
|
|
$this->source_height, |
|
354
|
|
|
$this->source_width, |
|
355
|
|
|
$this->source_height |
|
356
|
|
|
|
|
357
|
|
|
); |
|
358
|
|
|
|
|
359
|
|
|
// if multiple filters are to be applied at once |
|
360
|
|
|
if (is_array($filter)) { |
|
361
|
|
|
|
|
362
|
|
|
// iterate through the filters |
|
363
|
|
|
foreach ($filter as $arguments) |
|
364
|
|
|
|
|
365
|
|
|
// if filter exists |
|
366
|
|
|
if (defined('IMG_FILTER_' . strtoupper($arguments[0]))) { |
|
367
|
|
|
|
|
368
|
|
|
// try to apply the filter... |
|
369
|
|
|
if (!@imagefilter(...array_merge([$target_identifier, constant('IMG_FILTER_' . strtoupper($arguments[0]))], array_slice($arguments, 1)))) |
|
370
|
|
|
|
|
371
|
|
|
// ...and trigger an error if the filter could not be applied |
|
372
|
|
|
trigger_error('Invalid arguments used for "' . strtoupper($arguments[0]) . '" filter', E_USER_WARNING); |
|
373
|
|
|
|
|
374
|
|
|
// if filter doesn't exists, trigger an error |
|
375
|
|
|
} else trigger_error('Filter "' . strtoupper($arguments[0]) . '" is not available', E_USER_WARNING); |
|
376
|
|
|
|
|
377
|
|
|
// if a single filter is to be applied and it is available |
|
378
|
|
|
} elseif (defined('IMG_FILTER_' . strtoupper($filter))) { |
|
379
|
|
|
|
|
380
|
|
|
// get all the arguments passed to the method |
|
381
|
|
|
$arguments = func_get_args(); |
|
382
|
|
|
|
|
383
|
|
|
// try to apply the filter... |
|
384
|
|
|
if (!@imagefilter(...array_merge([$target_identifier, constant('IMG_FILTER_' . strtoupper($filter))], array_slice($arguments, 1)))) |
|
385
|
|
|
|
|
386
|
|
|
// ...and trigger an error if the filter could not be applied |
|
387
|
|
|
trigger_error('Invalid arguments used for "' . strtoupper($arguments[0]) . '" filter', E_USER_WARNING); |
|
388
|
|
|
|
|
389
|
|
|
// if filter doesn't exists, trigger an error |
|
390
|
|
|
} else trigger_error('Filter "' . strtoupper($arguments[0]) . '" is not available', E_USER_WARNING); |
|
391
|
|
|
|
|
392
|
|
|
// write image |
|
393
|
|
|
return $this->_write_image($target_identifier); |
|
394
|
|
|
|
|
395
|
|
|
} |
|
396
|
|
|
|
|
397
|
|
|
// if script gets this far, return false |
|
398
|
|
|
// note that we do not set the error level as it has been already set |
|
399
|
|
|
// by the _create_from_source() method earlier, if the case |
|
400
|
|
|
return false; |
|
401
|
|
|
|
|
402
|
|
|
} |
|
403
|
|
|
|
|
404
|
|
|
/** |
|
405
|
|
|
* Crops a portion of the image given as {@link source_path} and outputs it as the file specified as {@link target_path}. |
|
406
|
|
|
* |
|
407
|
|
|
* <code> |
|
408
|
|
|
* // include the Zebra_Image library |
|
409
|
|
|
* require 'path/to/Zebra_Image.php'; |
|
410
|
|
|
* |
|
411
|
|
|
* // instantiate the class |
|
412
|
|
|
* $img = new Zebra_Image(); |
|
413
|
|
|
* |
|
414
|
|
|
* // a source image |
|
415
|
|
|
* $img->source_path = 'path/to/source.ext'; |
|
416
|
|
|
* |
|
417
|
|
|
* // path to where should the resulting image be saved |
|
418
|
|
|
* // note that by simply setting a different extension to the file will |
|
419
|
|
|
* // instruct the script to create an image of that particular type |
|
420
|
|
|
* $img->target_path = 'path/to/target.ext'; |
|
421
|
|
|
* |
|
422
|
|
|
* // crop a rectangle of 100x100 pixels, starting from the top-left corner |
|
423
|
|
|
* $img->crop(0, 0, 100, 100); |
|
424
|
|
|
* </code> |
|
425
|
|
|
* |
|
426
|
|
|
* @param integer $start_x x coordinate to start cropping from |
|
427
|
|
|
* |
|
428
|
|
|
* @param integer $start_y y coordinate to start cropping from |
|
429
|
|
|
* |
|
430
|
|
|
* @param integer $end_x x coordinate where to end the cropping |
|
431
|
|
|
* |
|
432
|
|
|
* @param integer $end_y y coordinate where to end the cropping |
|
433
|
|
|
* |
|
434
|
|
|
* @since 1.0.4 |
|
435
|
|
|
* |
|
436
|
|
|
* @return boolean Returns TRUE on success or FALSE on error. |
|
437
|
|
|
* |
|
438
|
|
|
* If FALSE is returned, check the {@link error} property to see the error code. |
|
439
|
|
|
*/ |
|
440
|
|
|
public function crop($start_x, $start_y, $end_x, $end_y) { |
|
441
|
|
|
|
|
442
|
|
|
// this method might be also called internally |
|
443
|
|
|
// in this case, there's a fifth argument that points to an already existing image identifier |
|
444
|
|
|
$args = func_get_args(); |
|
445
|
|
|
|
|
446
|
|
|
// if fifth argument exists |
|
447
|
|
|
if (isset($args[4]) && is_resource($args[4])) { |
|
448
|
|
|
|
|
449
|
|
|
// that it is the image identifier that we'll be using further on |
|
450
|
|
|
$this->source_identifier = $args[4]; |
|
451
|
|
|
|
|
452
|
|
|
// set this to true so that the script will continue to execute at the next IF |
|
453
|
|
|
$result = true; |
|
454
|
|
|
|
|
455
|
|
|
// if method is called as usually |
|
456
|
|
|
// try to create an image resource from source path |
|
457
|
|
|
} else $result = $this->_create_from_source(); |
|
458
|
|
|
|
|
459
|
|
|
// if image resource was successfully created |
|
460
|
|
|
if (false !== $result) { |
|
461
|
|
|
|
|
462
|
|
|
// prepare the target image |
|
463
|
|
|
$target_identifier = $this->_prepare_image($end_x - $start_x, $end_y - $start_y, -1); |
|
464
|
|
|
|
|
465
|
|
|
// crop the image |
|
466
|
|
|
imagecopyresampled( |
|
467
|
|
|
|
|
468
|
|
|
$target_identifier, |
|
469
|
|
|
$this->source_identifier, |
|
470
|
|
|
0, |
|
471
|
|
|
0, |
|
472
|
|
|
$start_x, |
|
473
|
|
|
$start_y, |
|
474
|
|
|
$end_x - $start_x, |
|
475
|
|
|
$end_y - $start_y, |
|
476
|
|
|
$end_x - $start_x, |
|
477
|
|
|
$end_y - $start_y |
|
478
|
|
|
|
|
479
|
|
|
); |
|
480
|
|
|
|
|
481
|
|
|
// write image |
|
482
|
|
|
return $this->_write_image($target_identifier); |
|
483
|
|
|
|
|
484
|
|
|
} |
|
485
|
|
|
|
|
486
|
|
|
// if script gets this far, return false |
|
487
|
|
|
// note that we do not set the error level as it has been already set |
|
488
|
|
|
// by the _create_from_source() method earlier |
|
489
|
|
|
return false; |
|
490
|
|
|
|
|
491
|
|
|
} |
|
492
|
|
|
|
|
493
|
|
|
/** |
|
494
|
|
|
* Flips both horizontally and vertically the image given as {@link source_path} and outputs the resulted image as |
|
495
|
|
|
* {@link target_path} |
|
496
|
|
|
* |
|
497
|
|
|
* <code> |
|
498
|
|
|
* // include the Zebra_Image library |
|
499
|
|
|
* require 'path/to/Zebra_Image.php'; |
|
500
|
|
|
* |
|
501
|
|
|
* // instantiate the class |
|
502
|
|
|
* $img = new Zebra_Image(); |
|
503
|
|
|
* |
|
504
|
|
|
* // a source image |
|
505
|
|
|
* $img->source_path = 'path/to/source.ext'; |
|
506
|
|
|
* |
|
507
|
|
|
* // path to where should the resulting image be saved |
|
508
|
|
|
* // note that by simply setting a different extension to the file will |
|
509
|
|
|
* // instruct the script to create an image of that particular type |
|
510
|
|
|
* $img->target_path = 'path/to/target.ext'; |
|
511
|
|
|
* |
|
512
|
|
|
* // flip the image both horizontally and vertically |
|
513
|
|
|
* $img->flip_both(); |
|
514
|
|
|
* </code> |
|
515
|
|
|
* |
|
516
|
|
|
* @since 2.1 |
|
517
|
|
|
* |
|
518
|
|
|
* @return boolean Returns TRUE on success or FALSE on error. |
|
519
|
|
|
* |
|
520
|
|
|
* If FALSE is returned, check the {@link error} property to see the error code. |
|
521
|
|
|
*/ |
|
522
|
|
|
public function flip_both() { |
|
523
|
|
|
|
|
524
|
|
|
return $this->_flip('both'); |
|
525
|
|
|
|
|
526
|
|
|
} |
|
527
|
|
|
|
|
528
|
|
|
/** |
|
529
|
|
|
* Flips horizontally the image given as {@link source_path} and outputs the resulted image as {@link target_path} |
|
530
|
|
|
* |
|
531
|
|
|
* <code> |
|
532
|
|
|
* // include the Zebra_Image library |
|
533
|
|
|
* require 'path/to/Zebra_Image.php'; |
|
534
|
|
|
* |
|
535
|
|
|
* // instantiate the class |
|
536
|
|
|
* $img = new Zebra_Image(); |
|
537
|
|
|
* |
|
538
|
|
|
* // a source image |
|
539
|
|
|
* $img->source_path = 'path/to/source.ext'; |
|
540
|
|
|
* |
|
541
|
|
|
* // path to where should the resulting image be saved |
|
542
|
|
|
* // note that by simply setting a different extension to the file will |
|
543
|
|
|
* // instruct the script to create an image of that particular type |
|
544
|
|
|
* $img->target_path = 'path/to/target.ext'; |
|
545
|
|
|
* |
|
546
|
|
|
* // flip the image horizontally |
|
547
|
|
|
* $img->flip_horizontal(); |
|
548
|
|
|
* </code> |
|
549
|
|
|
* |
|
550
|
|
|
* @return boolean Returns TRUE on success or FALSE on error. |
|
551
|
|
|
* |
|
552
|
|
|
* If FALSE is returned, check the {@link error} property to see the error code. |
|
553
|
|
|
*/ |
|
554
|
|
|
public function flip_horizontal() { |
|
555
|
|
|
|
|
556
|
|
|
return $this->_flip('horizontal'); |
|
557
|
|
|
|
|
558
|
|
|
} |
|
559
|
|
|
|
|
560
|
|
|
/** |
|
561
|
|
|
* Flips vertically the image given as {@link source_path} and outputs the resulted image as {@link target_path} |
|
562
|
|
|
* |
|
563
|
|
|
* <code> |
|
564
|
|
|
* // include the Zebra_Image library |
|
565
|
|
|
* require 'path/to/Zebra_Image.php'; |
|
566
|
|
|
* |
|
567
|
|
|
* // instantiate the class |
|
568
|
|
|
* $img = new Zebra_Image(); |
|
569
|
|
|
* |
|
570
|
|
|
* // a source image |
|
571
|
|
|
* $img->source_path = 'path/to/source.ext'; |
|
572
|
|
|
* |
|
573
|
|
|
* // path to where should the resulting image be saved |
|
574
|
|
|
* // note that by simply setting a different extension to the file will |
|
575
|
|
|
* // instruct the script to create an image of that particular type |
|
576
|
|
|
* $img->target_path = 'path/to/target.ext'; |
|
577
|
|
|
* |
|
578
|
|
|
* // flip the image vertically |
|
579
|
|
|
* $img->flip_vertical(); |
|
580
|
|
|
* </code> |
|
581
|
|
|
* |
|
582
|
|
|
* @return boolean Returns TRUE on success or FALSE on error. |
|
583
|
|
|
* |
|
584
|
|
|
* If FALSE is returned, check the {@link error} property to see the error code. |
|
585
|
|
|
*/ |
|
586
|
|
|
public function flip_vertical() { |
|
587
|
|
|
|
|
588
|
|
|
return $this->_flip('vertical'); |
|
589
|
|
|
|
|
590
|
|
|
} |
|
591
|
|
|
|
|
592
|
|
|
/** |
|
593
|
|
|
* Resizes the image given as {@link source_path} and outputs the resulted image as {@link target_path}. |
|
594
|
|
|
* |
|
595
|
|
|
* <code> |
|
596
|
|
|
* // include the Zebra_Image library |
|
597
|
|
|
* require 'path/to/Zebra_Image.php'; |
|
598
|
|
|
* |
|
599
|
|
|
* // instantiate the class |
|
600
|
|
|
* $img = new Zebra_Image(); |
|
601
|
|
|
* |
|
602
|
|
|
* // a source image |
|
603
|
|
|
* $img->source_path = 'path/to/source.ext'; |
|
604
|
|
|
* |
|
605
|
|
|
* // path to where should the resulting image be saved |
|
606
|
|
|
* // note that by simply setting a different extension to the file will |
|
607
|
|
|
* // instruct the script to create an image of that particular type |
|
608
|
|
|
* $img->target_path = 'path/to/target.ext'; |
|
609
|
|
|
* |
|
610
|
|
|
* // apply a "sharpen" filter to the resulting images |
|
611
|
|
|
* $img->sharpen_images = true; |
|
612
|
|
|
* |
|
613
|
|
|
* // resize the image to exactly 150x150 pixels, without altering aspect ratio, by using the CROP_CENTER method |
|
614
|
|
|
* $img->resize(150, 150, ZEBRA_IMAGE_CROP_CENTER); |
|
615
|
|
|
* </code> |
|
616
|
|
|
* |
|
617
|
|
|
* @param integer $width The width to resize the image to. |
|
618
|
|
|
* |
|
619
|
|
|
* If set to <b>0</b>, the width will be automatically adjusted, depending |
|
620
|
|
|
* on the value of the <b>height</b> argument so that the image preserves |
|
621
|
|
|
* its aspect ratio. |
|
622
|
|
|
* |
|
623
|
|
|
* If {@link preserve_aspect_ratio} is set to TRUE and both this and the |
|
624
|
|
|
* <b>height</b> arguments are values greater than <b>0</b>, the image will |
|
625
|
|
|
* be resized to the exact required width and height and the aspect ratio |
|
626
|
|
|
* will be preserved - (also see the description for the <b>method</b> |
|
627
|
|
|
* argument below on how can this be done). |
|
628
|
|
|
* |
|
629
|
|
|
* If {@link preserve_aspect_ratio} is set to FALSE, the image will be |
|
630
|
|
|
* resized to the required width and the aspect ratio will be ignored. |
|
631
|
|
|
* |
|
632
|
|
|
* If both <b>width</b> and <b>height</b> are set to <b>0</b>, a copy of |
|
633
|
|
|
* the source image will be created ({@link jpeg_quality} and |
|
634
|
|
|
* {@link png_compression} will still apply). |
|
635
|
|
|
* |
|
636
|
|
|
* If either <b>width</b> or <b>height</b> are set to <b>0</b>, the script |
|
637
|
|
|
* will consider the value of the {@link preserve_aspect_ratio} to bet set |
|
638
|
|
|
* to TRUE regardless of its actual value! |
|
639
|
|
|
* |
|
640
|
|
|
* @param integer $height The height to resize the image to. |
|
641
|
|
|
* |
|
642
|
|
|
* If set to <b>0</b>, the height will be automatically adjusted, depending |
|
643
|
|
|
* on the value of the <b>width</b> argument so that the image preserves |
|
644
|
|
|
* its aspect ratio. |
|
645
|
|
|
* |
|
646
|
|
|
* If {@link preserve_aspect_ratio} is set to TRUE and both this and the |
|
647
|
|
|
* <b>width</b> arguments are values greater than <b>0</b>, the image will |
|
648
|
|
|
* be resized to the exact required width and height and the aspect ratio |
|
649
|
|
|
* will be preserved - (also see the description for the <b>method</b> |
|
650
|
|
|
* argument below on how can this be done). |
|
651
|
|
|
* |
|
652
|
|
|
* If {@link preserve_aspect_ratio} is set to FALSE, the image will be |
|
653
|
|
|
* resized to the required height and the aspect ratio will be ignored. |
|
654
|
|
|
* |
|
655
|
|
|
* If both <b>width</b> and <b>height</b> are set to <b>0</b>, a copy of |
|
656
|
|
|
* the source image will be created ({@link jpeg_quality} and |
|
657
|
|
|
* {@link png_compression} will still apply). |
|
658
|
|
|
* |
|
659
|
|
|
* If either <b>height</b> or <b>width</b> are set to <b>0</b>, the script |
|
660
|
|
|
* will consider the value of the {@link preserve_aspect_ratio} to bet set |
|
661
|
|
|
* to TRUE regardless of its actual value! |
|
662
|
|
|
* |
|
663
|
|
|
* @param int $method (Optional) Method to use when resizing images to exact width and height |
|
664
|
|
|
* while preserving aspect ratio. |
|
665
|
|
|
* |
|
666
|
|
|
* If the {@link preserve_aspect_ratio} property is set to TRUE and both the |
|
667
|
|
|
* <b>width</b> and <b>height</b> arguments are values greater than <b>0</b>, |
|
668
|
|
|
* the image will be resized to the exact given width and height and the |
|
669
|
|
|
* aspect ratio will be preserved by using on of the following methods: |
|
670
|
|
|
* |
|
671
|
|
|
* - <b>ZEBRA_IMAGE_BOXED</b> - the image will be scaled so that it will |
|
672
|
|
|
* fit in a box with the given width and height (both width/height will |
|
673
|
|
|
* be smaller or equal to the required width/height) and then it will |
|
674
|
|
|
* be centered both horizontally and vertically. The blank area will be |
|
675
|
|
|
* filled with the color specified by the <b>bgcolor</b> argument. (the |
|
676
|
|
|
* blank area will be filled only if the image is not transparent!) |
|
677
|
|
|
* |
|
678
|
|
|
* - <b>ZEBRA_IMAGE_NOT_BOXED</b> - the image will be scaled so that it |
|
679
|
|
|
* <i>could</i> fit in a box with the given width and height but will |
|
680
|
|
|
* not be enclosed in a box with given width and height. The new width/ |
|
681
|
|
|
* height will be both smaller or equal to the required width/height |
|
682
|
|
|
* |
|
683
|
|
|
* - <b>ZEBRA_IMAGE_CROP_TOPLEFT</b> |
|
684
|
|
|
* - <b>ZEBRA_IMAGE_CROP_TOPCENTER</b> |
|
685
|
|
|
* - <b>ZEBRA_IMAGE_CROP_TOPRIGHT</b> |
|
686
|
|
|
* - <b>ZEBRA_IMAGE_CROP_MIDDLELEFT</b> |
|
687
|
|
|
* - <b>ZEBRA_IMAGE_CROP_CENTER</b> |
|
688
|
|
|
* - <b>ZEBRA_IMAGE_CROP_MIDDLERIGHT</b> |
|
689
|
|
|
* - <b>ZEBRA_IMAGE_CROP_BOTTOMLEFT</b> |
|
690
|
|
|
* - <b>ZEBRA_IMAGE_CROP_BOTTOMCENTER</b> |
|
691
|
|
|
* - <b>ZEBRA_IMAGE_CROP_BOTTOMRIGHT</b> |
|
692
|
|
|
* |
|
693
|
|
|
* For the methods involving crop, first the image is scaled so that both |
|
694
|
|
|
* its sides are equal or greater than the respective sizes of the bounding |
|
695
|
|
|
* box; next, a region of required width and height will be cropped from |
|
696
|
|
|
* indicated region of the resulted image. |
|
697
|
|
|
* |
|
698
|
|
|
* Default is ZEBRA_IMAGE_CROP_CENTER |
|
699
|
|
|
* |
|
700
|
|
|
* @param string $background_color (Optional) The hexadecimal color (like "#FFFFFF" or "#FFF") of the |
|
701
|
|
|
* blank area. See the <b>method</b> argument. |
|
702
|
|
|
* |
|
703
|
|
|
* When set to -1 the script will preserve transparency for transparent GIF |
|
704
|
|
|
* and PNG images. For non-transparent images the background will be white |
|
705
|
|
|
* in this case. |
|
706
|
|
|
* |
|
707
|
|
|
* Default is #FFFFFF. |
|
708
|
|
|
* |
|
709
|
|
|
* @return boolean Returns TRUE on success or FALSE on error. |
|
710
|
|
|
* |
|
711
|
|
|
* If FALSE is returned, check the {@link error} property to see what went |
|
712
|
|
|
* wrong |
|
713
|
|
|
*/ |
|
714
|
|
|
public function resize($width = 0, $height = 0, $method = ZEBRA_IMAGE_CROP_CENTER, $background_color = '#FFFFFF') { |
|
715
|
|
|
|
|
716
|
|
|
// if image resource was successfully created |
|
717
|
|
|
if ($this->_create_from_source()) { |
|
718
|
|
|
|
|
719
|
|
|
// if either width or height is to be adjusted automatically |
|
720
|
|
|
// set a flag telling the script that, even if $preserve_aspect_ratio is set to false |
|
721
|
|
|
// treat everything as if it was set to true |
|
722
|
|
|
if (0 == $width || 0 == $height) $auto_preserve_aspect_ratio = true; |
|
723
|
|
|
|
|
724
|
|
|
// if aspect ratio needs to be preserved |
|
725
|
|
|
if ($this->preserve_aspect_ratio || isset($auto_preserve_aspect_ratio)) { |
|
726
|
|
|
|
|
727
|
|
|
// if height is given and width is to be computed accordingly |
|
728
|
|
|
if (0 == $width && $height > 0) { |
|
729
|
|
|
|
|
730
|
|
|
// get the original image's aspect ratio |
|
731
|
|
|
$aspect_ratio = $this->source_width / $this->source_height; |
|
732
|
|
|
|
|
733
|
|
|
// the target image's height is as given as argument to the method |
|
734
|
|
|
$target_height = $height; |
|
735
|
|
|
|
|
736
|
|
|
// compute the target image's width, preserving the aspect ratio |
|
737
|
|
|
$target_width = round($height * $aspect_ratio); |
|
738
|
|
|
|
|
739
|
|
|
// if width is given and height is to be computed accordingly |
|
740
|
|
|
} elseif ($width > 0 && 0 == $height) { |
|
741
|
|
|
|
|
742
|
|
|
// get the original image's aspect ratio |
|
743
|
|
|
$aspect_ratio = $this->source_height / $this->source_width; |
|
744
|
|
|
|
|
745
|
|
|
// the target image's width is as given as argument to the method |
|
746
|
|
|
$target_width = $width; |
|
747
|
|
|
|
|
748
|
|
|
// compute the target image's height, preserving the aspect ratio |
|
749
|
|
|
$target_height = round($width * $aspect_ratio); |
|
750
|
|
|
|
|
751
|
|
|
// if both width and height are given and ZEBRA_IMAGE_BOXED or ZEBRA_IMAGE_NOT_BOXED methods are to be used |
|
752
|
|
|
} elseif ($width > 0 && $height > 0 && (0 == $method || 1 == $method)) { |
|
753
|
|
|
|
|
754
|
|
|
// compute the horizontal and vertical aspect ratios |
|
755
|
|
|
$vertical_aspect_ratio = $height / $this->source_height; |
|
756
|
|
|
$horizontal_aspect_ratio = $width / $this->source_width; |
|
757
|
|
|
|
|
758
|
|
|
// if the image's newly computed height would be inside the bounding box |
|
759
|
|
|
if (round($horizontal_aspect_ratio * $this->source_height < $height)) { |
|
760
|
|
|
|
|
761
|
|
|
// the target image's width is as given as argument to the method |
|
762
|
|
|
$target_width = $width; |
|
763
|
|
|
|
|
764
|
|
|
// compute the target image's height so that the image will stay inside the bounding box |
|
765
|
|
|
$target_height = round($horizontal_aspect_ratio * $this->source_height); |
|
766
|
|
|
|
|
767
|
|
|
// otherwise |
|
768
|
|
|
} else { |
|
769
|
|
|
|
|
770
|
|
|
// the target image's height is as given as argument to the method |
|
771
|
|
|
$target_height = $height; |
|
772
|
|
|
|
|
773
|
|
|
// compute the target image's width so that the image will stay inside the bounding box |
|
774
|
|
|
$target_width = round($vertical_aspect_ratio * $this->source_width); |
|
775
|
|
|
|
|
776
|
|
|
} |
|
777
|
|
|
|
|
778
|
|
|
// if both width and height are given and image is to be cropped in order to get to the required size |
|
779
|
|
|
} elseif ($width > 0 && $height > 0 && $method > 1 && $method < 11) { |
|
780
|
|
|
|
|
781
|
|
|
// compute the horizontal and vertical aspect ratios |
|
782
|
|
|
$vertical_aspect_ratio = $this->source_height / $height; |
|
783
|
|
|
$horizontal_aspect_ratio = $this->source_width / $width; |
|
784
|
|
|
|
|
785
|
|
|
// we'll use one of the two |
|
786
|
|
|
$aspect_ratio = |
|
787
|
|
|
|
|
788
|
|
|
$vertical_aspect_ratio < $horizontal_aspect_ratio ? |
|
789
|
|
|
|
|
790
|
|
|
$vertical_aspect_ratio : |
|
791
|
|
|
|
|
792
|
|
|
$horizontal_aspect_ratio; |
|
793
|
|
|
|
|
794
|
|
|
// compute the target image's width, preserving the aspect ratio |
|
795
|
|
|
$target_width = round($this->source_width / $aspect_ratio); |
|
796
|
|
|
|
|
797
|
|
|
// compute the target image's height, preserving the aspect ratio |
|
798
|
|
|
$target_height = round($this->source_height / $aspect_ratio); |
|
799
|
|
|
|
|
800
|
|
|
// for any other case |
|
801
|
|
|
} else { |
|
802
|
|
|
|
|
803
|
|
|
// we will create a copy of the source image |
|
804
|
|
|
$target_width = $this->source_width; |
|
805
|
|
|
$target_height = $this->source_height; |
|
806
|
|
|
|
|
807
|
|
|
} |
|
808
|
|
|
|
|
809
|
|
|
// if aspect ratio does not need to be preserved |
|
810
|
|
|
} else { |
|
811
|
|
|
|
|
812
|
|
|
// compute the target image's width |
|
813
|
|
|
$target_width = ($width > 0 ? $width : $this->source_width); |
|
814
|
|
|
|
|
815
|
|
|
// compute the target image's height |
|
816
|
|
|
$target_height = ($height > 0 ? $height : $this->source_height); |
|
817
|
|
|
|
|
818
|
|
|
} |
|
819
|
|
|
|
|
820
|
|
|
// if |
|
821
|
|
|
if ( |
|
822
|
|
|
|
|
823
|
|
|
// all images are to be resized - including images that are smaller than the given width/height |
|
824
|
|
|
$this->enlarge_smaller_images || |
|
825
|
|
|
|
|
826
|
|
|
// smaller images than the given width/height are to be left untouched |
|
827
|
|
|
// but current image has at leas one side that is larger than the required width/height |
|
828
|
|
|
($width > 0 && $height > 0 ? |
|
829
|
|
|
|
|
830
|
|
|
($this->source_width > $width || $this->source_height > $height) : |
|
831
|
|
|
|
|
832
|
|
|
($this->source_width > $target_width || $this->source_height > $target_height) |
|
833
|
|
|
|
|
834
|
|
|
) |
|
835
|
|
|
|
|
836
|
|
|
) { |
|
837
|
|
|
|
|
838
|
|
|
// if |
|
839
|
|
|
if ( |
|
840
|
|
|
|
|
841
|
|
|
// aspect ratio needs to be preserved AND |
|
842
|
|
|
($this->preserve_aspect_ratio || isset($auto_preserve_aspect_ratio)) && |
|
843
|
|
|
|
|
844
|
|
|
// both width and height are given |
|
845
|
|
|
($width > 0 && $height > 0) && |
|
846
|
|
|
|
|
847
|
|
|
// images are to be cropped |
|
848
|
|
|
($method > 1 && $method < 11) |
|
849
|
|
|
|
|
850
|
|
|
) { |
|
851
|
|
|
|
|
852
|
|
|
// prepare the target image |
|
853
|
|
|
$target_identifier = $this->_prepare_image($target_width, $target_height, $background_color); |
|
854
|
|
|
|
|
855
|
|
|
imagecopyresampled( |
|
856
|
|
|
|
|
857
|
|
|
$target_identifier, |
|
858
|
|
|
$this->source_identifier, |
|
859
|
|
|
0, |
|
860
|
|
|
0, |
|
861
|
|
|
0, |
|
862
|
|
|
0, |
|
863
|
|
|
$target_width, |
|
864
|
|
|
$target_height, |
|
865
|
|
|
$this->source_width, |
|
866
|
|
|
$this->source_height |
|
867
|
|
|
|
|
868
|
|
|
); |
|
869
|
|
|
|
|
870
|
|
|
// do the crop according to the required method |
|
871
|
|
|
switch ($method) { |
|
872
|
|
|
|
|
873
|
|
|
// if image needs to be cropped from the top-left corner |
|
874
|
|
|
case ZEBRA_IMAGE_CROP_TOPLEFT: |
|
875
|
|
|
|
|
876
|
|
|
// crop accordingly |
|
877
|
|
|
return $this->crop( |
|
878
|
|
|
0, |
|
879
|
|
|
0, |
|
880
|
|
|
$width, |
|
881
|
|
|
$height, |
|
882
|
|
|
$target_identifier // crop this resource instead |
|
883
|
|
|
); |
|
884
|
|
|
|
|
885
|
|
|
break; |
|
886
|
|
|
|
|
887
|
|
|
// if image needs to be cropped from the top-center |
|
888
|
|
|
case ZEBRA_IMAGE_CROP_TOPCENTER: |
|
889
|
|
|
|
|
890
|
|
|
// crop accordingly |
|
891
|
|
|
return $this->crop( |
|
892
|
|
|
floor(($target_width - $width) / 2), |
|
893
|
|
|
0, |
|
894
|
|
|
floor(($target_width - $width) / 2) + $width, |
|
895
|
|
|
$height, |
|
896
|
|
|
$target_identifier // crop this resource instead |
|
897
|
|
|
); |
|
898
|
|
|
|
|
899
|
|
|
break; |
|
900
|
|
|
|
|
901
|
|
|
// if image needs to be cropped from the top-right corner |
|
902
|
|
|
case ZEBRA_IMAGE_CROP_TOPRIGHT: |
|
903
|
|
|
|
|
904
|
|
|
// crop accordingly |
|
905
|
|
|
return $this->crop( |
|
906
|
|
|
$target_width - $width, |
|
907
|
|
|
0, |
|
908
|
|
|
$target_width, |
|
909
|
|
|
$height, |
|
910
|
|
|
$target_identifier // crop this resource instead |
|
911
|
|
|
); |
|
912
|
|
|
|
|
913
|
|
|
break; |
|
914
|
|
|
|
|
915
|
|
|
// if image needs to be cropped from the middle-left |
|
916
|
|
|
case ZEBRA_IMAGE_CROP_MIDDLELEFT: |
|
917
|
|
|
|
|
918
|
|
|
// crop accordingly |
|
919
|
|
|
return $this->crop( |
|
920
|
|
|
|
|
921
|
|
|
0, |
|
922
|
|
|
floor(($target_height - $height) / 2), |
|
923
|
|
|
$width, |
|
924
|
|
|
floor(($target_height - $height) / 2) + $height, |
|
925
|
|
|
$target_identifier // crop this resource instead |
|
926
|
|
|
|
|
927
|
|
|
); |
|
928
|
|
|
|
|
929
|
|
|
break; |
|
930
|
|
|
|
|
931
|
|
|
// if image needs to be cropped from the center of the image |
|
932
|
|
|
case ZEBRA_IMAGE_CROP_CENTER: |
|
933
|
|
|
|
|
934
|
|
|
// crop accordingly |
|
935
|
|
|
return $this->crop( |
|
936
|
|
|
|
|
937
|
|
|
floor(($target_width - $width) / 2), |
|
938
|
|
|
floor(($target_height - $height) / 2), |
|
939
|
|
|
floor(($target_width - $width) / 2) + $width, |
|
940
|
|
|
floor(($target_height - $height) / 2) + $height, |
|
941
|
|
|
$target_identifier // crop this resource instead |
|
942
|
|
|
|
|
943
|
|
|
); |
|
944
|
|
|
|
|
945
|
|
|
break; |
|
946
|
|
|
|
|
947
|
|
|
// if image needs to be cropped from the middle-right |
|
948
|
|
|
case ZEBRA_IMAGE_CROP_MIDDLERIGHT: |
|
949
|
|
|
|
|
950
|
|
|
// crop accordingly |
|
951
|
|
|
return $this->crop( |
|
952
|
|
|
|
|
953
|
|
|
$target_width - $width, |
|
954
|
|
|
floor(($target_height - $height) / 2), |
|
955
|
|
|
$target_width, |
|
956
|
|
|
floor(($target_height - $height) / 2) + $height, |
|
957
|
|
|
$target_identifier // crop this resource instead |
|
958
|
|
|
|
|
959
|
|
|
); |
|
960
|
|
|
|
|
961
|
|
|
break; |
|
962
|
|
|
|
|
963
|
|
|
// if image needs to be cropped from the bottom-left corner |
|
964
|
|
|
case ZEBRA_IMAGE_CROP_BOTTOMLEFT: |
|
965
|
|
|
|
|
966
|
|
|
// crop accordingly |
|
967
|
|
|
return $this->crop( |
|
968
|
|
|
|
|
969
|
|
|
0, |
|
970
|
|
|
$target_height - $height, |
|
971
|
|
|
$width, |
|
972
|
|
|
$target_height, |
|
973
|
|
|
$target_identifier // crop this resource instead |
|
974
|
|
|
|
|
975
|
|
|
); |
|
976
|
|
|
|
|
977
|
|
|
break; |
|
978
|
|
|
|
|
979
|
|
|
// if image needs to be cropped from the bottom-center |
|
980
|
|
|
case ZEBRA_IMAGE_CROP_BOTTOMCENTER: |
|
981
|
|
|
|
|
982
|
|
|
// crop accordingly |
|
983
|
|
|
return $this->crop( |
|
984
|
|
|
|
|
985
|
|
|
floor(($target_width - $width) / 2), |
|
986
|
|
|
$target_height - $height, |
|
987
|
|
|
floor(($target_width - $width) / 2) + $width, |
|
988
|
|
|
$target_height, |
|
989
|
|
|
$target_identifier // crop this resource instead |
|
990
|
|
|
|
|
991
|
|
|
); |
|
992
|
|
|
|
|
993
|
|
|
break; |
|
994
|
|
|
|
|
995
|
|
|
// if image needs to be cropped from the bottom-right corner |
|
996
|
|
|
case ZEBRA_IMAGE_CROP_BOTTOMRIGHT: |
|
997
|
|
|
|
|
998
|
|
|
// crop accordingly |
|
999
|
|
|
return $this->crop( |
|
1000
|
|
|
|
|
1001
|
|
|
$target_width - $width, |
|
1002
|
|
|
$target_height - $height, |
|
1003
|
|
|
$target_width, |
|
1004
|
|
|
$target_height, |
|
1005
|
|
|
$target_identifier // crop this resource instead |
|
1006
|
|
|
|
|
1007
|
|
|
); |
|
1008
|
|
|
|
|
1009
|
|
|
break; |
|
1010
|
|
|
|
|
1011
|
|
|
} |
|
1012
|
|
|
|
|
1013
|
|
|
// if aspect ratio doesn't need to be preserved or |
|
1014
|
|
|
// it needs to be preserved and method is ZEBRA_IMAGE_BOXED or ZEBRA_IMAGE_NOT_BOXED |
|
1015
|
|
|
} else { |
|
1016
|
|
|
|
|
1017
|
|
|
// prepare the target image |
|
1018
|
|
|
$target_identifier = $this->_prepare_image( |
|
1019
|
|
|
($width > 0 && $height > 0 && ZEBRA_IMAGE_NOT_BOXED != $method ? $width : $target_width), |
|
1020
|
|
|
($width > 0 && $height > 0 && ZEBRA_IMAGE_NOT_BOXED != $method ? $height : $target_height), |
|
1021
|
|
|
$background_color |
|
1022
|
|
|
); |
|
1023
|
|
|
|
|
1024
|
|
|
imagecopyresampled( |
|
1025
|
|
|
|
|
1026
|
|
|
$target_identifier, |
|
1027
|
|
|
$this->source_identifier, |
|
1028
|
|
|
($width > 0 && $height > 0 && ZEBRA_IMAGE_NOT_BOXED != $method ? ($width - $target_width) / 2 : 0), |
|
1029
|
|
|
($width > 0 && $height > 0 && ZEBRA_IMAGE_NOT_BOXED != $method ? ($height - $target_height) / 2 : 0), |
|
1030
|
|
|
0, |
|
1031
|
|
|
0, |
|
1032
|
|
|
$target_width, |
|
1033
|
|
|
$target_height, |
|
1034
|
|
|
$this->source_width, |
|
1035
|
|
|
$this->source_height |
|
1036
|
|
|
|
|
1037
|
|
|
); |
|
1038
|
|
|
|
|
1039
|
|
|
// if script gets this far, write the image to disk |
|
1040
|
|
|
return $this->_write_image($target_identifier); |
|
1041
|
|
|
|
|
1042
|
|
|
} |
|
1043
|
|
|
|
|
1044
|
|
|
// if we get here it means that |
|
1045
|
|
|
// smaller images than the given width/height are to be left untouched |
|
1046
|
|
|
// therefore, we save the image as it is |
|
1047
|
|
|
} else { |
|
1048
|
|
|
|
|
1049
|
|
|
// prepare the target image |
|
1050
|
|
|
$target_identifier = $this->_prepare_image($this->source_width, $this->source_height, $background_color); |
|
1051
|
|
|
|
|
1052
|
|
|
imagecopyresampled( |
|
1053
|
|
|
|
|
1054
|
|
|
$target_identifier, |
|
1055
|
|
|
$this->source_identifier, |
|
1056
|
|
|
0, |
|
1057
|
|
|
0, |
|
1058
|
|
|
0, |
|
1059
|
|
|
0, |
|
1060
|
|
|
$this->source_width, |
|
1061
|
|
|
$this->source_height, |
|
1062
|
|
|
$this->source_width, |
|
1063
|
|
|
$this->source_height |
|
1064
|
|
|
|
|
1065
|
|
|
); |
|
1066
|
|
|
|
|
1067
|
|
|
// previously to 2.2.7 I was simply calling the _write_images() method without the code from above this |
|
1068
|
|
|
// comment and therefore, when resizing transparent images to a format which doesn't support transparency |
|
1069
|
|
|
// and the "enlarge_smaller_images" property being set to FALSE, the "background_color" argument was not |
|
1070
|
|
|
// applied and lead to unexpected background colors for the resulting images |
|
1071
|
|
|
return $this->_write_image($target_identifier); |
|
1072
|
|
|
|
|
1073
|
|
|
} |
|
1074
|
|
|
|
|
1075
|
|
|
} |
|
1076
|
|
|
|
|
1077
|
|
|
// if script gets this far return false |
|
1078
|
|
|
// note that we do not set the error level as it has been already set |
|
1079
|
|
|
// by the _create_from_source() method earlier |
|
1080
|
|
|
return false; |
|
1081
|
|
|
|
|
1082
|
|
|
} |
|
1083
|
|
|
|
|
1084
|
|
|
/** |
|
1085
|
|
|
* Rotates the image given as {@link source_path} and outputs the resulted image as {@link target_path}. |
|
1086
|
|
|
* |
|
1087
|
|
|
* <code> |
|
1088
|
|
|
* // include the Zebra_Image library |
|
1089
|
|
|
* require 'path/to/Zebra_Image.php'; |
|
1090
|
|
|
* |
|
1091
|
|
|
* // instantiate the class |
|
1092
|
|
|
* $img = new Zebra_Image(); |
|
1093
|
|
|
* |
|
1094
|
|
|
* // a source image |
|
1095
|
|
|
* $img->source_path = 'path/to/source.ext'; |
|
1096
|
|
|
* |
|
1097
|
|
|
* // path to where should the resulting image be saved |
|
1098
|
|
|
* // note that by simply setting a different extension to the file will |
|
1099
|
|
|
* // instruct the script to create an image of that particular type |
|
1100
|
|
|
* $img->target_path = 'path/to/target.ext'; |
|
1101
|
|
|
* |
|
1102
|
|
|
* // rotate the image 45 degrees, clockwise |
|
1103
|
|
|
* $img->rotate(45); |
|
1104
|
|
|
* </code> |
|
1105
|
|
|
* |
|
1106
|
|
|
* @param double $angle Angle by which to rotate the image clockwise. |
|
1107
|
|
|
* |
|
1108
|
|
|
* Between 0 and 360. |
|
1109
|
|
|
* |
|
1110
|
|
|
* @param mixed $background_color (Optional) The hexadecimal color (like "#FFFFFF" or "#FFF") of the |
|
1111
|
|
|
* uncovered zone after the rotation. |
|
1112
|
|
|
* |
|
1113
|
|
|
* When set to -1 the script will preserve transparency for transparent GIF |
|
1114
|
|
|
* and PNG images. For non-transparent images the background will be white |
|
1115
|
|
|
* in this case. |
|
1116
|
|
|
* |
|
1117
|
|
|
* Default is -1. |
|
1118
|
|
|
* |
|
1119
|
|
|
* @return boolean Returns TRUE on success or FALSE on error. |
|
1120
|
|
|
* |
|
1121
|
|
|
* If FALSE is returned, check the {@link error} property to see the error |
|
1122
|
|
|
* code. |
|
1123
|
|
|
*/ |
|
1124
|
|
|
public function rotate($angle, $background_color = -1) { |
|
1125
|
|
|
|
|
1126
|
|
|
// get function arguments |
|
1127
|
|
|
$arguments = func_get_args(); |
|
1128
|
|
|
|
|
1129
|
|
|
// if a third argument exists |
|
1130
|
|
|
$use_existing_source = (isset($arguments[2]) && false === $arguments[2]); |
|
1131
|
|
|
|
|
1132
|
|
|
// if we came here just to fix orientation or if image resource was successfully created |
|
1133
|
|
|
if ($use_existing_source || $this->_create_from_source()) { |
|
1134
|
|
|
|
|
1135
|
|
|
// angles are given clockwise but imagerotate works counterclockwise so we need to negate our value |
|
1136
|
|
|
$angle = -$angle; |
|
1137
|
|
|
|
|
1138
|
|
|
// if source image is PNG |
|
1139
|
|
|
if (IMAGETYPE_PNG == $this->source_type && -1 == $background_color) { |
|
1140
|
|
|
|
|
1141
|
|
|
// rotate the image |
|
1142
|
|
|
// but if using -1 as background color didn't work (as is the case for PNG8) |
|
1143
|
|
|
if (!($target_identifier = imagerotate($this->source_identifier, $angle, -1))) { |
|
1144
|
|
|
|
|
1145
|
|
|
// we will be using #FFF as the color to fill the uncovered zone after the rotation |
|
1146
|
|
|
$background_color = imagecolorallocate($this->source_identifier, 255, 255, 255); |
|
1147
|
|
|
|
|
1148
|
|
|
// rotate the image |
|
1149
|
|
|
$target_identifier = imagerotate($this->source_identifier, $angle, $background_color); |
|
1150
|
|
|
|
|
1151
|
|
|
} |
|
1152
|
|
|
|
|
1153
|
|
|
// if source image is a transparent GIF |
|
1154
|
|
|
} elseif (IMAGETYPE_GIF == $this->source_type && $this->source_transparent_color_index >= 0) { |
|
1155
|
|
|
|
|
1156
|
|
|
// convert the background color to RGB values |
|
1157
|
|
|
$background_color = $this->_hex2rgb($background_color); |
|
1158
|
|
|
|
|
1159
|
|
|
// allocate the color to the image identifier |
|
1160
|
|
|
$background_color = imagecolorallocate( |
|
1161
|
|
|
|
|
1162
|
|
|
$this->source_identifier, |
|
1163
|
|
|
$background_color['r'], |
|
1164
|
|
|
$background_color['g'], |
|
1165
|
|
|
$background_color['b'] |
|
1166
|
|
|
|
|
1167
|
|
|
); |
|
1168
|
|
|
|
|
1169
|
|
|
// rotate the image |
|
1170
|
|
|
$this->source_identifier = imagerotate($this->source_identifier, $angle, $background_color); |
|
1171
|
|
|
|
|
1172
|
|
|
// get the width of rotated image |
|
1173
|
|
|
$width = imagesx($this->source_identifier); |
|
1174
|
|
|
|
|
1175
|
|
|
// get the height of rotated image |
|
1176
|
|
|
$height = imagesy($this->source_identifier); |
|
1177
|
|
|
|
|
1178
|
|
|
// create a blank image with the new width and height |
|
1179
|
|
|
// (this intermediary step is for preserving transparency) |
|
1180
|
|
|
$target_identifier = $this->_prepare_image($width, $height, -1); |
|
1181
|
|
|
|
|
1182
|
|
|
// copy the rotated image on to the new one |
|
1183
|
|
|
imagecopyresampled($target_identifier, $this->source_identifier, 0, 0, 0, 0, $width, $height, $width, $height); |
|
1184
|
|
|
|
|
1185
|
|
|
// for the other cases |
|
1186
|
|
|
} else { |
|
1187
|
|
|
|
|
1188
|
|
|
// convert the color to RGB values |
|
1189
|
|
|
$background_color = $this->_hex2rgb($background_color); |
|
1190
|
|
|
|
|
1191
|
|
|
// allocate the color to the image identifier |
|
1192
|
|
|
$background_color = imagecolorallocate( |
|
1193
|
|
|
|
|
1194
|
|
|
$this->source_identifier, |
|
1195
|
|
|
$background_color['r'], |
|
1196
|
|
|
$background_color['g'], |
|
1197
|
|
|
$background_color['b'] |
|
1198
|
|
|
|
|
1199
|
|
|
); |
|
1200
|
|
|
|
|
1201
|
|
|
// rotate the image |
|
1202
|
|
|
$target_identifier = imagerotate($this->source_identifier, $angle, $background_color); |
|
1203
|
|
|
|
|
1204
|
|
|
} |
|
1205
|
|
|
|
|
1206
|
|
|
// if we called this method from the _create_from_source() method |
|
1207
|
|
|
// because we are fixing orientation |
|
1208
|
|
|
if ($use_existing_source) { |
|
1209
|
|
|
|
|
1210
|
|
|
// make any further method work on the rotated image |
|
1211
|
|
|
$this->source_identifier = $target_identifier; |
|
1212
|
|
|
|
|
1213
|
|
|
// update the width and height of the image to the values |
|
1214
|
|
|
// of the rotated image |
|
1215
|
|
|
$this->source_width = imagesx($target_identifier); |
|
1216
|
|
|
$this->source_height = imagesy($target_identifier); |
|
1217
|
|
|
|
|
1218
|
|
|
return true; |
|
1219
|
|
|
|
|
1220
|
|
|
// write image otherwise |
|
1221
|
|
|
} else return $this->_write_image($target_identifier); |
|
1222
|
|
|
|
|
1223
|
|
|
} |
|
1224
|
|
|
|
|
1225
|
|
|
// if script gets this far return false |
|
1226
|
|
|
// note that we do not set the error level as it has been already set |
|
1227
|
|
|
// by the _create_from_source() method earlier |
|
1228
|
|
|
return false; |
|
1229
|
|
|
|
|
1230
|
|
|
} |
|
1231
|
|
|
|
|
1232
|
|
|
/** |
|
1233
|
|
|
* Returns an array containing the image identifier representing the image obtained from {@link $source_path}, the |
|
1234
|
|
|
* image's width and height and the image's type |
|
1235
|
|
|
* |
|
1236
|
|
|
* @access private |
|
1237
|
|
|
*/ |
|
1238
|
|
|
private function _create_from_source() { |
|
1239
|
|
|
|
|
1240
|
|
|
// perform some error checking first |
|
1241
|
|
|
// if the GD library is not installed |
|
1242
|
|
|
if (!function_exists('gd_info')) { |
|
1243
|
|
|
|
|
1244
|
|
|
// save the error level and stop the execution of the script |
|
1245
|
|
|
$this->error = 7; |
|
1246
|
|
|
|
|
1247
|
|
|
return false; |
|
1248
|
|
|
|
|
1249
|
|
|
// if source file does not exist |
|
1250
|
|
|
} elseif (!is_file($this->source_path)) { |
|
1251
|
|
|
|
|
1252
|
|
|
// save the error level and stop the execution of the script |
|
1253
|
|
|
$this->error = 1; |
|
1254
|
|
|
|
|
1255
|
|
|
return false; |
|
1256
|
|
|
|
|
1257
|
|
|
// if source file is not readable |
|
1258
|
|
|
} elseif (!is_readable($this->source_path)) { |
|
1259
|
|
|
|
|
1260
|
|
|
// save the error level and stop the execution of the script |
|
1261
|
|
|
$this->error = 2; |
|
1262
|
|
|
|
|
1263
|
|
|
return false; |
|
1264
|
|
|
|
|
1265
|
|
|
// if target file is same as source file and source file is not writable |
|
1266
|
|
|
} elseif ($this->target_path == $this->source_path && !is_writable($this->source_path)) { |
|
1267
|
|
|
|
|
1268
|
|
|
// save the error level and stop the execution of the script |
|
1269
|
|
|
$this->error = 3; |
|
1270
|
|
|
|
|
1271
|
|
|
return false; |
|
1272
|
|
|
|
|
1273
|
|
|
// try to get source file width, height and type |
|
1274
|
|
|
// and if it founds an unsupported file type |
|
1275
|
|
|
} elseif (!list($this->source_width, $this->source_height, $this->source_type) = @getimagesize($this->source_path)) { |
|
1276
|
|
|
|
|
1277
|
|
|
// save the error level and stop the execution of the script |
|
1278
|
|
|
$this->error = 4; |
|
1279
|
|
|
|
|
1280
|
|
|
return false; |
|
1281
|
|
|
|
|
1282
|
|
|
// if no errors so far |
|
1283
|
|
|
} else { |
|
1284
|
|
|
|
|
1285
|
|
|
// get target file's type based on the file extension |
|
1286
|
|
|
$this->target_type = strtolower(substr($this->target_path, strrpos($this->target_path, '.') + 1)); |
|
1287
|
|
|
|
|
1288
|
|
|
// create an image from file using extension dependant function |
|
1289
|
|
|
// checks for file extension |
|
1290
|
|
|
switch ($this->source_type) { |
|
1291
|
|
|
|
|
1292
|
|
|
// if GIF |
|
1293
|
|
|
case IMAGETYPE_GIF: |
|
1294
|
|
|
|
|
1295
|
|
|
// create an image from file |
|
1296
|
|
|
$identifier = imagecreatefromgif($this->source_path); |
|
1297
|
|
|
|
|
1298
|
|
|
// get the index of the transparent color (if any) |
|
1299
|
|
|
if (($this->source_transparent_color_index = imagecolortransparent($identifier)) >= 0) |
|
1300
|
|
|
|
|
1301
|
|
|
// get the transparent color's RGB values |
|
1302
|
|
|
// we have to mute errors because there are GIF images which *are* transparent and everything |
|
1303
|
|
|
// works as expected, but imagecolortransparent() returns a color that is outside the range of |
|
1304
|
|
|
// colors in the image's pallette... |
|
1305
|
|
|
$this->source_transparent_color = @imagecolorsforindex($identifier, $this->source_transparent_color_index); |
|
1306
|
|
|
|
|
1307
|
|
|
break; |
|
1308
|
|
|
|
|
1309
|
|
|
// if JPEG |
|
1310
|
|
|
case IMAGETYPE_JPEG: |
|
1311
|
|
|
|
|
1312
|
|
|
// create an image from file |
|
1313
|
|
|
$identifier = imagecreatefromjpeg($this->source_path); |
|
1314
|
|
|
|
|
1315
|
|
|
break; |
|
1316
|
|
|
|
|
1317
|
|
|
// if PNG |
|
1318
|
|
|
case IMAGETYPE_PNG: |
|
1319
|
|
|
|
|
1320
|
|
|
// create an image from file |
|
1321
|
|
|
$identifier = imagecreatefrompng($this->source_path); |
|
1322
|
|
|
|
|
1323
|
|
|
// disable blending |
|
1324
|
|
|
imagealphablending($identifier, false); |
|
1325
|
|
|
|
|
1326
|
|
|
break; |
|
1327
|
|
|
|
|
1328
|
|
|
default: |
|
1329
|
|
|
|
|
1330
|
|
|
// if unsupported file type |
|
1331
|
|
|
// note that we call this if the file is not GIF, JPG or PNG even though the getimagesize function |
|
1332
|
|
|
// handles more image types |
|
1333
|
|
|
$this->error = 4; |
|
1334
|
|
|
|
|
1335
|
|
|
return false; |
|
1336
|
|
|
|
|
1337
|
|
|
} |
|
1338
|
|
|
|
|
1339
|
|
|
} |
|
1340
|
|
|
|
|
1341
|
|
|
// if target file has to have the same timestamp as the source image |
|
1342
|
|
|
// save it as a global property of the class |
|
1343
|
|
|
if ($this->preserve_time) $this->source_image_time = filemtime($this->source_path); |
|
1344
|
|
|
|
|
1345
|
|
|
// make available the source image's identifier |
|
1346
|
|
|
$this->source_identifier = $identifier; |
|
1347
|
|
|
|
|
1348
|
|
|
// for JPEG files, if we need to handle exif orientation automatically |
|
1349
|
|
|
if ($this->auto_handle_exif_orientation && IMAGETYPE_JPEG === $this->source_type) |
|
1350
|
|
|
|
|
1351
|
|
|
// if "exif_read_data" function is not available, return false |
|
1352
|
|
|
if (!function_exists('exif_read_data')) { |
|
1353
|
|
|
|
|
1354
|
|
|
// save the error level and stop the execution of the script |
|
1355
|
|
|
$this->error = 9; |
|
1356
|
|
|
|
|
1357
|
|
|
return false; |
|
1358
|
|
|
|
|
1359
|
|
|
// if "exif_read_data" function is available, EXIF information is available, orientation information is available and orientation needs fixing |
|
1360
|
|
|
} elseif (($exif = exif_read_data($this->source_path)) && isset($exif['Orientation']) && in_array($exif['Orientation'], [3, 6, 8])) { |
|
1361
|
|
|
|
|
1362
|
|
|
// fix the orientation |
|
1363
|
|
|
switch ($exif['Orientation']) { |
|
1364
|
|
|
|
|
1365
|
|
|
case 3: |
|
1366
|
|
|
|
|
1367
|
|
|
// 180 rotate left |
|
1368
|
|
|
$this->rotate(180, -1, false); |
|
1369
|
|
|
break; |
|
1370
|
|
|
|
|
1371
|
|
|
case 6: |
|
1372
|
|
|
|
|
1373
|
|
|
// 90 rotate right |
|
1374
|
|
|
$this->rotate(90, -1, false); |
|
1375
|
|
|
break; |
|
1376
|
|
|
|
|
1377
|
|
|
case 8: |
|
1378
|
|
|
|
|
1379
|
|
|
// 90 rotate left |
|
1380
|
|
|
$this->rotate(-90, -1, false); |
|
1381
|
|
|
break; |
|
1382
|
|
|
|
|
1383
|
|
|
} |
|
1384
|
|
|
|
|
1385
|
|
|
} |
|
1386
|
|
|
|
|
1387
|
|
|
return true; |
|
1388
|
|
|
|
|
1389
|
|
|
} |
|
1390
|
|
|
|
|
1391
|
|
|
/** |
|
1392
|
|
|
* Flips horizontally or vertically or both ways the image given as {@link source_path}. |
|
1393
|
|
|
* |
|
1394
|
|
|
* @since 2.1 |
|
1395
|
|
|
* |
|
1396
|
|
|
* @access private |
|
1397
|
|
|
* |
|
1398
|
|
|
* @param $orientation |
|
1399
|
|
|
* @return boolean Returns TRUE on success or FALSE on error. |
|
1400
|
|
|
* |
|
1401
|
|
|
* If FALSE is returned, check the {@link error} property to see the error code. |
|
1402
|
|
|
*/ |
|
1403
|
|
|
private function _flip($orientation) { |
|
1404
|
|
|
|
|
1405
|
|
|
// if image resource was successfully created |
|
1406
|
|
|
if ($this->_create_from_source()) { |
|
1407
|
|
|
|
|
1408
|
|
|
// prepare the target image |
|
1409
|
|
|
$target_identifier = $this->_prepare_image($this->source_width, $this->source_height, -1); |
|
1410
|
|
|
|
|
1411
|
|
|
// flip according to $orientation |
|
1412
|
|
|
switch ($orientation) { |
|
1413
|
|
|
|
|
1414
|
|
|
case 'horizontal': |
|
1415
|
|
|
|
|
1416
|
|
|
imagecopyresampled( |
|
1417
|
|
|
|
|
1418
|
|
|
$target_identifier, |
|
1419
|
|
|
$this->source_identifier, |
|
1420
|
|
|
0, |
|
1421
|
|
|
0, $this->source_width - 1, |
|
1422
|
|
|
0, |
|
1423
|
|
|
$this->source_width, |
|
1424
|
|
|
$this->source_height, |
|
1425
|
|
|
-$this->source_width, |
|
1426
|
|
|
$this->source_height |
|
1427
|
|
|
|
|
1428
|
|
|
); |
|
1429
|
|
|
|
|
1430
|
|
|
break; |
|
1431
|
|
|
|
|
1432
|
|
|
case 'vertical': |
|
1433
|
|
|
|
|
1434
|
|
|
imagecopyresampled( |
|
1435
|
|
|
|
|
1436
|
|
|
$target_identifier, |
|
1437
|
|
|
$this->source_identifier, |
|
1438
|
|
|
0, |
|
1439
|
|
|
0, |
|
1440
|
|
|
0, $this->source_height - 1, |
|
1441
|
|
|
$this->source_width, |
|
1442
|
|
|
$this->source_height, |
|
1443
|
|
|
$this->source_width, |
|
1444
|
|
|
-$this->source_height |
|
1445
|
|
|
|
|
1446
|
|
|
); |
|
1447
|
|
|
|
|
1448
|
|
|
break; |
|
1449
|
|
|
|
|
1450
|
|
|
case 'both': |
|
1451
|
|
|
|
|
1452
|
|
|
imagecopyresampled( |
|
1453
|
|
|
|
|
1454
|
|
|
$target_identifier, |
|
1455
|
|
|
$this->source_identifier, |
|
1456
|
|
|
0, |
|
1457
|
|
|
0, $this->source_width - 1, $this->source_height - 1, |
|
1458
|
|
|
$this->source_width, |
|
1459
|
|
|
$this->source_height, |
|
1460
|
|
|
-$this->source_width, |
|
1461
|
|
|
-$this->source_height |
|
1462
|
|
|
|
|
1463
|
|
|
); |
|
1464
|
|
|
|
|
1465
|
|
|
break; |
|
1466
|
|
|
|
|
1467
|
|
|
} |
|
1468
|
|
|
|
|
1469
|
|
|
// write image |
|
1470
|
|
|
return $this->_write_image($target_identifier); |
|
1471
|
|
|
|
|
1472
|
|
|
} |
|
1473
|
|
|
|
|
1474
|
|
|
// if script gets this far, return false |
|
1475
|
|
|
// note that we do not set the error level as it has been already set |
|
1476
|
|
|
// by the _create_from_source() method earlier |
|
1477
|
|
|
return false; |
|
1478
|
|
|
|
|
1479
|
|
|
} |
|
1480
|
|
|
|
|
1481
|
|
|
/** |
|
1482
|
|
|
* Converts a hexadecimal representation of a color (i.e. #123456 or #AAA) to a RGB representation. |
|
1483
|
|
|
* |
|
1484
|
|
|
* The RGB values will be a value between 0 and 255 each. |
|
1485
|
|
|
* |
|
1486
|
|
|
* @param string $color Hexadecimal representation of a color (i.e. #123456 or #AAA). |
|
1487
|
|
|
* |
|
1488
|
|
|
* @param string $default_on_error Hexadecimal representation of a color to be used in case $color is not |
|
1489
|
|
|
* recognized as a hexadecimal color. |
|
1490
|
|
|
* |
|
1491
|
|
|
* @return array Returns an associative array with the values of (R)ed, (G)reen and (B)lue |
|
1492
|
|
|
* |
|
1493
|
|
|
* @access private |
|
1494
|
|
|
*/ |
|
1495
|
|
|
private function _hex2rgb($color, $default_on_error = '#FFFFFF') { |
|
1496
|
|
|
|
|
1497
|
|
|
// if color is not formatted correctly |
|
1498
|
|
|
// use the default color |
|
1499
|
|
|
if (0 == preg_match('/^#?([a-f]|[0-9]){3}(([a-f]|[0-9]){3})?$/i', $color)) $color = $default_on_error; |
|
1500
|
|
|
|
|
1501
|
|
|
// trim off the "#" prefix from $background_color |
|
1502
|
|
|
$color = ltrim($color, '#'); |
|
1503
|
|
|
|
|
1504
|
|
|
// if color is given using the shorthand (i.e. "FFF" instead of "FFFFFF") |
|
1505
|
|
|
if (3 == strlen($color)) { |
|
1506
|
|
|
|
|
1507
|
|
|
$tmp = ''; |
|
1508
|
|
|
|
|
1509
|
|
|
// take each value |
|
1510
|
|
|
// and duplicate it |
|
1511
|
|
|
for ($i = 0; $i < 3; $i++) $tmp .= str_repeat($color[$i], 2); |
|
1512
|
|
|
|
|
1513
|
|
|
// the color in it's full, 6 characters length notation |
|
1514
|
|
|
$color = $tmp; |
|
1515
|
|
|
|
|
1516
|
|
|
} |
|
1517
|
|
|
|
|
1518
|
|
|
// decimal representation of the color |
|
1519
|
|
|
$int = hexdec($color); |
|
1520
|
|
|
|
|
1521
|
|
|
// extract and return the RGB values |
|
1522
|
|
|
return [ |
|
1523
|
|
|
|
|
1524
|
|
|
'r' => 0xFF & ($int >> 0x10), |
|
1525
|
|
|
'g' => 0xFF & ($int >> 0x8), |
|
1526
|
|
|
'b' => 0xFF & $int |
|
1527
|
|
|
|
|
1528
|
|
|
]; |
|
1529
|
|
|
|
|
1530
|
|
|
} |
|
1531
|
|
|
|
|
1532
|
|
|
/** |
|
1533
|
|
|
* Creates a blank image of given width, height and background color. |
|
1534
|
|
|
* |
|
1535
|
|
|
* @param integer $width Width of the new image. |
|
1536
|
|
|
* |
|
1537
|
|
|
* @param integer $height Height of the new image. |
|
1538
|
|
|
* |
|
1539
|
|
|
* @param string $background_color (Optional) The hexadecimal color of the background. |
|
1540
|
|
|
* |
|
1541
|
|
|
* Can also be -1 case in which the script will try to create a transparent |
|
1542
|
|
|
* image, if possible. |
|
1543
|
|
|
* |
|
1544
|
|
|
* Default is "#FFFFFF". |
|
1545
|
|
|
* |
|
1546
|
|
|
* @return resource identifier of the newly created image. |
|
1547
|
|
|
* |
|
1548
|
|
|
* @access private |
|
1549
|
|
|
*/ |
|
1550
|
|
|
private function _prepare_image($width, $height, $background_color = '#FFFFFF') { |
|
1551
|
|
|
|
|
1552
|
|
|
// create a blank image |
|
1553
|
|
|
$identifier = imagecreatetruecolor((int)$width <= 0 ? 1 : (int)$width, (int)$height <= 0 ? 1 : (int)$height); |
|
1554
|
|
|
|
|
1555
|
|
|
// if we are creating a PNG image |
|
1556
|
|
|
if ('png' === $this->target_type && -1 == $background_color) { |
|
1557
|
|
|
|
|
1558
|
|
|
// disable blending |
|
1559
|
|
|
imagealphablending($identifier, false); |
|
1560
|
|
|
|
|
1561
|
|
|
// allocate a transparent color |
|
1562
|
|
|
$transparent_color = imagecolorallocatealpha($identifier, 0, 0, 0, 127); |
|
1563
|
|
|
|
|
1564
|
|
|
// fill the image with the transparent color |
|
1565
|
|
|
imagefill($identifier, 0, 0, $transparent_color); |
|
1566
|
|
|
|
|
1567
|
|
|
//save full alpha channel information |
|
1568
|
|
|
imagesavealpha($identifier, true); |
|
1569
|
|
|
|
|
1570
|
|
|
// if source image is a transparent GIF |
|
1571
|
|
|
} elseif ('gif' === $this->target_type && -1 == $background_color && $this->source_transparent_color_index >= 0) { |
|
1572
|
|
|
|
|
1573
|
|
|
// allocate the source image's transparent color also to the new image resource |
|
1574
|
|
|
$transparent_color = imagecolorallocate( |
|
1575
|
|
|
$identifier, |
|
1576
|
|
|
$this->source_transparent_color['red'], |
|
1577
|
|
|
$this->source_transparent_color['green'], |
|
1578
|
|
|
$this->source_transparent_color['blue'] |
|
1579
|
|
|
); |
|
1580
|
|
|
|
|
1581
|
|
|
// fill the background of the new image with transparent color |
|
1582
|
|
|
imagefill($identifier, 0, 0, $transparent_color); |
|
1583
|
|
|
|
|
1584
|
|
|
// from now on, every pixel having the same RGB as the transparent color will be transparent |
|
1585
|
|
|
imagecolortransparent($identifier, $transparent_color); |
|
1586
|
|
|
|
|
1587
|
|
|
// for other image types |
|
1588
|
|
|
} else { |
|
1589
|
|
|
|
|
1590
|
|
|
// if transparent background color specified, revert to white |
|
1591
|
|
|
if (-1 == $background_color) $background_color = '#FFFFFF'; |
|
1592
|
|
|
|
|
1593
|
|
|
// convert hex color to rgb |
|
1594
|
|
|
$background_color = $this->_hex2rgb($background_color); |
|
1595
|
|
|
|
|
1596
|
|
|
// prepare the background color |
|
1597
|
|
|
$background_color = imagecolorallocate($identifier, $background_color['r'], $background_color['g'], $background_color['b']); |
|
1598
|
|
|
|
|
1599
|
|
|
// fill the image with the background color |
|
1600
|
|
|
imagefill($identifier, 0, 0, $background_color); |
|
1601
|
|
|
|
|
1602
|
|
|
} |
|
1603
|
|
|
|
|
1604
|
|
|
// return the image's identifier |
|
1605
|
|
|
return $identifier; |
|
1606
|
|
|
|
|
1607
|
|
|
} |
|
1608
|
|
|
|
|
1609
|
|
|
/** |
|
1610
|
|
|
* Sharpens images. Useful when creating thumbnails. |
|
1611
|
|
|
* |
|
1612
|
|
|
* Code taken from the comments at {@link http://docs.php.net/imageconvolution}. |
|
1613
|
|
|
* |
|
1614
|
|
|
* <i>This function will yield a result only for PHP version 5.1.0+ and will leave the image unaltered for older |
|
1615
|
|
|
* versions!</i> |
|
1616
|
|
|
* |
|
1617
|
|
|
* @param $image |
|
1618
|
|
|
* @return mixed |
|
1619
|
|
|
* @access private |
|
1620
|
|
|
*/ |
|
1621
|
|
|
private function _sharpen_image($image) { |
|
1622
|
|
|
|
|
1623
|
|
|
// if the "sharpen_images" is set to true and we're running an appropriate version of PHP |
|
1624
|
|
|
// (the "imageconvolution" is available only for PHP 5.1.0+) |
|
1625
|
|
|
if ($this->sharpen_images && version_compare(PHP_VERSION, '5.1.0') >= 0) { |
|
1626
|
|
|
|
|
1627
|
|
|
// the convolution matrix as an array of three arrays of three floats |
|
1628
|
|
|
$matrix = [ |
|
1629
|
|
|
[-1.2, -1, -1.2], |
|
1630
|
|
|
[-1, 20, -1], |
|
1631
|
|
|
[-1.2, -1, -1.2], |
|
1632
|
|
|
]; |
|
1633
|
|
|
|
|
1634
|
|
|
// the divisor of the matrix |
|
1635
|
|
|
$divisor = array_sum(array_map('array_sum', $matrix)); |
|
1636
|
|
|
|
|
1637
|
|
|
// color offset |
|
1638
|
|
|
$offset = 0; |
|
1639
|
|
|
|
|
1640
|
|
|
// sharpen image |
|
1641
|
|
|
imageconvolution($image, $matrix, $divisor, $offset); |
|
1642
|
|
|
|
|
1643
|
|
|
} |
|
1644
|
|
|
|
|
1645
|
|
|
// return the image's identifier |
|
1646
|
|
|
return $image; |
|
1647
|
|
|
|
|
1648
|
|
|
} |
|
1649
|
|
|
|
|
1650
|
|
|
/** |
|
1651
|
|
|
* Creates a new image from given image identifier having the extension as specified by {@link target_path}. |
|
1652
|
|
|
* |
|
1653
|
|
|
* @param resource $identifier identifier An image identifier |
|
1654
|
|
|
* |
|
1655
|
|
|
* @return boolean Returns TRUE on success or FALSE on error. |
|
1656
|
|
|
* |
|
1657
|
|
|
* If FALSE is returned, check the {@link error} property to see the error code. |
|
1658
|
|
|
* |
|
1659
|
|
|
* @access private |
|
1660
|
|
|
*/ |
|
1661
|
|
|
private function _write_image($identifier) { |
|
1662
|
|
|
|
|
1663
|
|
|
// sharpen image if it's required |
|
1664
|
|
|
$this->_sharpen_image($identifier); |
|
1665
|
|
|
|
|
1666
|
|
|
// image saving process goes according to required extension |
|
1667
|
|
|
switch ($this->target_type) { |
|
1668
|
|
|
|
|
1669
|
|
|
// if GIF |
|
1670
|
|
|
case 'gif': |
|
1671
|
|
|
|
|
1672
|
|
|
// if GD support for this file type is not available |
|
1673
|
|
|
// in version 1.6 of GD the support for GIF files was dropped see |
|
1674
|
|
|
// http://php.net/manual/en/function.imagegif.php#function.imagegif.notes |
|
1675
|
|
|
if (!function_exists('imagegif')) { |
|
1676
|
|
|
|
|
1677
|
|
|
// save the error level and stop the execution of the script |
|
1678
|
|
|
$this->error = 6; |
|
1679
|
|
|
|
|
1680
|
|
|
return false; |
|
1681
|
|
|
|
|
1682
|
|
|
// if, for some reason, file could not be created |
|
1683
|
|
|
} elseif (@!imagegif($identifier, $this->target_path)) { |
|
1684
|
|
|
|
|
1685
|
|
|
// save the error level and stop the execution of the script |
|
1686
|
|
|
$this->error = 3; |
|
1687
|
|
|
|
|
1688
|
|
|
return false; |
|
1689
|
|
|
|
|
1690
|
|
|
} |
|
1691
|
|
|
|
|
1692
|
|
|
break; |
|
1693
|
|
|
|
|
1694
|
|
|
// if JPEG |
|
1695
|
|
|
case 'jpg': |
|
1696
|
|
|
case 'jpeg': |
|
1697
|
|
|
|
|
1698
|
|
|
// if GD support for this file type is not available |
|
1699
|
|
|
if (!function_exists('imagejpeg')) { |
|
1700
|
|
|
|
|
1701
|
|
|
// save the error level and stop the execution of the script |
|
1702
|
|
|
$this->error = 6; |
|
1703
|
|
|
|
|
1704
|
|
|
return false; |
|
1705
|
|
|
|
|
1706
|
|
|
// if, for some reason, file could not be created |
|
1707
|
|
|
} elseif (@!imagejpeg($identifier, $this->target_path, $this->jpeg_quality)) { |
|
1708
|
|
|
|
|
1709
|
|
|
// save the error level and stop the execution of the script |
|
1710
|
|
|
$this->error = 3; |
|
1711
|
|
|
|
|
1712
|
|
|
return false; |
|
1713
|
|
|
|
|
1714
|
|
|
} |
|
1715
|
|
|
|
|
1716
|
|
|
break; |
|
1717
|
|
|
|
|
1718
|
|
|
// if PNG |
|
1719
|
|
|
case 'png': |
|
1720
|
|
|
|
|
1721
|
|
|
// save full alpha channel information |
|
1722
|
|
|
imagesavealpha($identifier, true); |
|
1723
|
|
|
|
|
1724
|
|
|
// if GD support for this file type is not available |
|
1725
|
|
|
if (!function_exists('imagepng')) { |
|
1726
|
|
|
|
|
1727
|
|
|
// save the error level and stop the execution of the script |
|
1728
|
|
|
$this->error = 6; |
|
1729
|
|
|
|
|
1730
|
|
|
return false; |
|
1731
|
|
|
|
|
1732
|
|
|
// if, for some reason, file could not be created |
|
1733
|
|
|
} elseif (@!imagepng($identifier, $this->target_path, $this->png_compression)) { |
|
1734
|
|
|
|
|
1735
|
|
|
// save the error level and stop the execution of the script |
|
1736
|
|
|
$this->error = 3; |
|
1737
|
|
|
|
|
1738
|
|
|
return false; |
|
1739
|
|
|
|
|
1740
|
|
|
} |
|
1741
|
|
|
|
|
1742
|
|
|
break; |
|
1743
|
|
|
|
|
1744
|
|
|
// if not a supported file extension |
|
1745
|
|
|
default: |
|
1746
|
|
|
|
|
1747
|
|
|
// save the error level and stop the execution of the script |
|
1748
|
|
|
$this->error = 5; |
|
1749
|
|
|
|
|
1750
|
|
|
return false; |
|
1751
|
|
|
|
|
1752
|
|
|
} |
|
1753
|
|
|
|
|
1754
|
|
|
// get a list of functions disabled via configuration |
|
1755
|
|
|
$disabled_functions = @ini_get('disable_functions'); |
|
1756
|
|
|
|
|
1757
|
|
|
// if the 'chmod' function is not disabled via configuration |
|
1758
|
|
|
if ('' == $disabled_functions || false === strpos('chmod', $disabled_functions)) { |
|
1759
|
|
|
|
|
1760
|
|
|
// chmod the file |
|
1761
|
|
|
chmod($this->target_path, intval($this->chmod_value, 8)); |
|
1762
|
|
|
|
|
1763
|
|
|
// save the error level |
|
1764
|
|
|
} else $this->error = 8; |
|
1765
|
|
|
|
|
1766
|
|
|
// if target file has to have the same timestamp as the source image |
|
1767
|
|
|
if ($this->preserve_time && isset($this->source_image_time)) { |
|
1768
|
|
|
|
|
1769
|
|
|
// touch the newly created file |
|
1770
|
|
|
@touch($this->target_path, $this->source_image_time); |
|
1771
|
|
|
|
|
1772
|
|
|
} |
|
1773
|
|
|
|
|
1774
|
|
|
// return true |
|
1775
|
|
|
return true; |
|
1776
|
|
|
|
|
1777
|
|
|
} |
|
1778
|
|
|
|
|
1779
|
|
|
} |
|
1780
|
|
|
|
mambax7 /
pedigree
