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Your IP : 216.73.216.174
<?php
/*
* bfi_thumb - WP Image Resizer v1.3
*
* (c) 2013 Benjamin F. Intal / Gambit
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/** Uses WP's Image Editor Class to resize and filter images
*
* @param $url string the local image URL to manipulate
* @param $params array the options to perform on the image. Keys and values supported:
* 'width' int pixels
* 'height' int pixels
* 'opacity' int 0-100
* 'color' string hex-color #000000-#ffffff
* 'grayscale' bool
* 'negate' bool
* 'crop' bool
* @param $single boolean, if false then an array of data will be returned
* @return string|array containing the url of the resized modofied image
*/
if ( ! defined( 'ABSPATH' ) ) exit; // Exit if accessed directly
if ( !function_exists( 'bfi_thumb' ) ) {
function bfi_thumb($url, $params = array(), $single = true) {
$class = BFI_Class_Factory::getNewestVersion( 'BFI_Thumb' );
return call_user_func( array( $class, 'thumb' ), $url, $params, $single );
}
}
/**
* Class factory, this is to make sure that when multiple bfi_thumb scripts
* are used (e.g. a plugin and a theme both use it), we always use the
* latest version.
*/
if ( !class_exists( 'BFI_Class_Factory' ) ) {
class BFI_Class_Factory {
public static $versions = array();
public static $latestClass = array();
public static function addClassVersion( $baseClassName, $className, $version ) {
if ( empty( self::$versions[$baseClassName] ) ) {
self::$versions[$baseClassName] = array();
}
self::$versions[$baseClassName][] = array(
'class' => $className,
'version' => $version
);
}
public static function getNewestVersion( $baseClassName ) {
if ( empty( self::$latestClass[$baseClassName] ) ) {
usort( self::$versions[$baseClassName], array( __CLASS__, "versionCompare" ) );
self::$latestClass[$baseClassName] = self::$versions[$baseClassName][0]['class'];
unset( self::$versions[$baseClassName] );
}
return self::$latestClass[$baseClassName];
}
public static function versionCompare( $a, $b ) {
return version_compare( $a['version'], $b['version'] ) == 1 ? -1 : 1;
}
}
}
/*
* Change the default image editors
*/
add_filter('wp_image_editors', 'bfi_wp_image_editor');
// Instead of using the default image editors, use our extended ones
if ( !function_exists( 'bfi_wp_image_editor' ) ) {
function bfi_wp_image_editor($editorArray) {
// Make sure that we use the latest versions
return array(
BFI_Class_Factory::getNewestVersion( 'BFI_Image_Editor_GD' ),
BFI_Class_Factory::getNewestVersion( 'BFI_Image_Editor_Imagick' ),
);
}
}
require_once ABSPATH . WPINC . '/class-wp-image-editor.php';
require_once ABSPATH . WPINC . '/class-wp-image-editor-imagick.php';
require_once ABSPATH . WPINC . '/class-wp-image-editor-gd.php';
/**
* check for ImageMagick or GD
*/
add_action('admin_init', 'bfi_wp_image_editor_check');
if ( !function_exists( 'bfi_wp_image_editor_check' ) ) {
function bfi_wp_image_editor_check() {
$arg = array('mime_type' => 'image/jpeg');
if (wp_image_editor_supports($arg) !== true) {
add_filter('admin_notices', 'bfi_wp_image_editor_check_notice');
}
}
}
if ( !function_exists( 'bfi_wp_image_editor_check_notice' ) ) {
function bfi_wp_image_editor_check_notice() {
printf("<div class='error'><p>%s</div>",
__("The server does not have ImageMagick or GD installed and/or enabled! Any of these libraries are required for WordPress to be able to resize images. Please contact your server administrator to enable this before continuing.", "default"));
}
}
/*
* Enhanced Imagemagick Image Editor
*/
if ( !class_exists( 'BFI_Image_Editor_Imagick_1_3' ) ) {
BFI_Class_Factory::addClassVersion( 'BFI_Image_Editor_Imagick', 'BFI_Image_Editor_Imagick_1_3', '1.3' );
class BFI_Image_Editor_Imagick_1_3 extends WP_Image_Editor_Imagick {
/** Changes the opacity of the image
*
* @supports 3.5.1
* @access public
*
* @param float $opacity (0.0-1.0)
* @return boolean|WP_Error
*/
public function opacity($opacity) {
$opacity /= 100;
try {
// From: http://stackoverflow.com/questions/3538851/php-imagick-setimageopacity-destroys-transparency-and-does-nothing
// preserves transparency
//$this->image->setImageOpacity($opacity);
return $this->image->evaluateImage(Imagick::EVALUATE_MULTIPLY, $opacity, Imagick::CHANNEL_ALPHA);
} catch ( Exception $e ) {
return new WP_Error( 'image_opacity_error', $e->getMessage() );
}
}
/** Tints the image a different color
*
* @supports 3.5.1
* @access public
*
* @param string hex color e.g. #ff00ff
* @return boolean|WP_Error
*/
public function colorize($hexColor) {
try {
return $this->image->colorizeImage($hexColor, 1.0);
} catch (Exception $e) {
return new WP_Error( 'image_colorize_error', $e->getMessage() );
}
}
/** Makes the image grayscale
*
* @supports 3.5.1
* @access public
*
* @return boolean|WP_Error
*/
public function grayscale() {
try {
return $this->image->modulateImage(100,0,100);
} catch (Exception $e) {
return new WP_Error( 'image_grayscale_error', $e->getMessage() );
}
}
/** Negates the image
*
* @supports 3.5.1
* @access public
*
* @return boolean|WP_Error
*/
public function negate() {
try {
return $this->image->negateImage(false);
} catch (Exception $e) {
return new WP_Error( 'image_negate_error', $e->getMessage() );
}
}
}
}
/*
* Enhanced GD Image Editor
*/
if ( !class_exists( 'BFI_Image_Editor_GD_1_3' ) ) {
BFI_Class_Factory::addClassVersion( 'BFI_Image_Editor_GD', 'BFI_Image_Editor_GD_1_3', '1.3' );
class BFI_Image_Editor_GD_1_3 extends WP_Image_Editor_GD {
/** Rotates current image counter-clockwise by $angle.
* Ported from image-edit.php
* Added presevation of alpha channels
*
* @since 3.5.0
* @access public
*
* @param float $angle
* @return boolean|WP_Error
*/
public function rotate( $angle ) {
if ( function_exists('imagerotate') ) {
$rotated = imagerotate( $this->image, $angle, 0 );
// Add alpha blending
imagealphablending($rotated, true);
imagesavealpha($rotated, true);
if ( is_resource( $rotated ) ) {
imagedestroy( $this->image );
$this->image = $rotated;
$this->update_size();
return true;
}
}
return new WP_Error( 'image_rotate_error', __('Image rotate failed.', 'default'), $this->file );
}
/** Changes the opacity of the image
*
* @supports 3.5.1
* @access public
*
* @param float $opacity (0.0-1.0)
* @return boolean|WP_Error
*/
public function opacity($opacity) {
$opacity /= 100;
$filtered = $this->_opacity($this->image, $opacity);
if (is_resource($filtered)) {
// imagedestroy($this->image);
$this->image = $filtered;
return true;
}
return new WP_Error( 'image_opacity_error', __('Image opacity change failed.', 'default'), $this->file );
}
// from: http://php.net/manual/en/function.imagefilter.php
// params: image resource id, opacity (eg. 0.0-1.0)
protected function _opacity($image, $opacity) {
if (!function_exists('imagealphablending') ||
!function_exists('imagecolorat') ||
!function_exists('imagecolorallocatealpha') ||
!function_exists('imagesetpixel')) return false;
//get image width and height
$w = imagesx( $image );
$h = imagesy( $image );
//turn alpha blending off
imagealphablending( $image, false );
//find the most opaque pixel in the image (the one with the smallest alpha value)
$minalpha = 127;
for ($x = 0; $x < $w; $x++) {
for ($y = 0; $y < $h; $y++) {
$alpha = (imagecolorat($image, $x, $y) >> 24 ) & 0xFF;
if( $alpha < $minalpha ) {
$minalpha = $alpha;
}
}
}
//loop through image pixels and modify alpha for each
for ( $x = 0; $x < $w; $x++ ) {
for ( $y = 0; $y < $h; $y++ ) {
//get current alpha value (represents the TANSPARENCY!)
$colorxy = imagecolorat( $image, $x, $y );
$alpha = ( $colorxy >> 24 ) & 0xFF;
//calculate new alpha
if ( $minalpha !== 127 ) {
$alpha = 127 + 127 * $opacity * ( $alpha - 127 ) / ( 127 - $minalpha );
} else {
$alpha += 127 * $opacity;
}
//get the color index with new alpha
$alphacolorxy = imagecolorallocatealpha( $image, ( $colorxy >> 16 ) & 0xFF, ( $colorxy >> 8 ) & 0xFF, $colorxy & 0xFF, $alpha );
//set pixel with the new color + opacity
if(!imagesetpixel($image, $x, $y, $alphacolorxy)) {
return false;
}
}
}
imagesavealpha($image, true);
return $image;
}
/** Tints the image a different color
*
* @supports 3.5.1
* @access public
*
* @param string hex color e.g. #ff00ff
* @return boolean|WP_Error
*/
public function colorize($hexColor) {
if (function_exists('imagefilter') &&
function_exists('imagesavealpha') &&
function_exists('imagealphablending')) {
$hexColor = preg_replace('#^\##', '', $hexColor);
$r = hexdec (substr ($hexColor, 0, 2));
$g = hexdec (substr ($hexColor, 2, 2));
$b = hexdec (substr ($hexColor, 2, 2));
imagealphablending( $this->image, false );
if (imagefilter($this->image, IMG_FILTER_COLORIZE, $r, $g, $b, 0)) {
imagesavealpha($this->image, true);
return true;
}
}
return new WP_Error( 'image_colorize_error', __('Image color change failed.', 'default'), $this->file );
}
/** Makes the image grayscale
*
* @supports 3.5.1
* @access public
*
* @return boolean|WP_Error
*/
public function grayscale() {
if (function_exists('imagefilter')) {
if (imagefilter($this->image, IMG_FILTER_GRAYSCALE)) {
return true;
}
}
return new WP_Error( 'image_grayscale_error', __('Image grayscale failed.', 'default'), $this->file );
}
/** Negates the image
*
* @supports 3.5.1
* @access public
*
* @return boolean|WP_Error
*/
public function negate() {
if (function_exists('imagefilter')) {
if (imagefilter($this->image, IMG_FILTER_NEGATE)) {
return true;
}
}
return new WP_Error( 'image_negate_error', __('Image negate failed.', 'default'), $this->file );
}
}
}
/*
* Main Class
*/
if ( !class_exists( 'BFI_Thumb_1_3' ) ) {
BFI_Class_Factory::addClassVersion( 'BFI_Thumb', 'BFI_Thumb_1_3', '1.3' );
class BFI_Thumb_1_3 {
/** Uses WP's Image Editor Class to resize and filter images
* Inspired by: https://github.com/sy4mil/Aqua-Resizer/blob/master/aq_resizer.php
*
* @param $url string the local image URL to manipulate
* @param $params array the options to perform on the image. Keys and values supported:
* 'width' int pixels
* 'height' int pixels
* 'opacity' int 0-100
* 'color' string hex-color #000000-#ffffff
* 'grayscale' bool
* 'crop' bool
* 'negate' bool
* @param $single boolean, if false then an array of data will be returned
* @return string|array
*/
public static function thumb($url, $params = array(), $single = true) {
extract($params);
//validate inputs
if(!$url) return false;
//define upload path & dir
$upload_info = wp_upload_dir();
$upload_dir = $upload_info['basedir'];
$upload_url = $upload_info['baseurl'];
$theme_url = get_template_directory_uri();
$theme_dir = get_template_directory();
// find the path of the image. Perform 2 checks:
// #1 check if the image is in the uploads folder
if(strpos( $url, $upload_url ) !== false) {
$rel_path = str_replace( $upload_url, '', $url);
$img_path = $upload_dir . $rel_path;
// #2 check if the image is in the current theme folder
} else if (strpos($url, $theme_url) !== false) {
$rel_path = str_replace( $theme_url, '', $url);
$img_path = $theme_dir . $rel_path;
}
// Fail if we can't find the image in our WP local directory
if ( empty( $img_path ) ) return $url;
//check if img path exists, and is an image indeed
if( !@file_exists($img_path) OR !getimagesize($img_path) ) return $url;
// This is the filename
$basename = basename($img_path);
//get image info
$info = pathinfo($img_path);
$ext = $info['extension'];
list($orig_w,$orig_h) = getimagesize($img_path);
// support percentage dimensions. compute percentage based on
// the original dimensions
if (isset($width)) {
if (stripos($width, '%') !== false) {
$width = (int)((float)str_replace('%', '', $width) / 100 * $orig_w);
}
}
if (isset($height)) {
if (stripos($height, '%') !== false) {
$height = (int)((float)str_replace('%', '', $height) / 100 * $orig_h);
}
}
// The only purpose of this is to detemine the final width and height
// without performing any actual image manipulation, which will be used
// to check whether a resize was previously done.
if (isset($width)) {
//get image size after cropping
$dims = image_resize_dimensions($orig_w, $orig_h, $width, isset($height) ? $height : null, isset($crop) ? $crop : false);
$dst_w = $dims[4];
$dst_h = $dims[5];
}
// create the suffix for the saved file
// we can use this to check whether we need to create a new file or just use an existing one.
$suffix = (string)filemtime($img_path) .
(isset($width) ? str_pad((string)$width, 5, '0', STR_PAD_LEFT) : '00000') .
(isset($height) ? str_pad((string)$height, 5, '0', STR_PAD_LEFT) : '00000') .
(isset($opacity) ? str_pad((string)$opacity, 3, '0', STR_PAD_LEFT) : '100') .
(isset($color) ? str_pad(preg_replace('#^\##', '', $color), 8, '0', STR_PAD_LEFT) : '00000000') .
(isset($grayscale) ? ($grayscale ? '1' : '0') : '0') .
(isset($crop) ? ($crop ? '1' : '0') : '0') .
(isset($negate) ? ($negate ? '1' : '0') : '0');
$suffix = self::base_convert_arbitrary($suffix, 10, 36);
// use this to check if cropped image already exists, so we can return that instead
$dst_rel_path = str_replace( '.'.$ext, '', basename($img_path));
// If opacity is set, change the image type to png
if (isset($opacity)) $ext = 'png';
// Create the upload subdirectory, this is where
// we store all our generated images
if ( defined( 'BFITHUMB_UPLOAD_DIR' ) ) {
$upload_dir .= "/" . BFITHUMB_UPLOAD_DIR;
$upload_url .= "/" . BFITHUMB_UPLOAD_DIR;
} else {
$upload_dir .= "/bfi_thumb";
$upload_url .= "/bfi_thumb";
}
if ( !is_dir( $upload_dir ) ) {
wp_mkdir_p( $upload_dir );
}
// desination paths and urls
$destfilename = "{$upload_dir}/{$dst_rel_path}-{$suffix}.{$ext}";
$img_url = "{$upload_url}/{$dst_rel_path}-{$suffix}.{$ext}";
// if file exists, just return it
if (@file_exists($destfilename) && getimagesize($destfilename)) {
} else {
// perform resizing and other filters
$editor = wp_get_image_editor($img_path);
if (is_wp_error( $editor )) return false;
/*
* Perform image manipulations
*/
if ( ( isset( $width ) && $width ) || ( isset( $height ) && $height ) ) {
if ( is_wp_error( $editor->resize( isset( $width ) ? $width : null, isset( $height ) ? $height : null, isset( $crop ) ? $crop : false ) ) ) {
return false;
}
}
if ( isset( $negate ) ) {
if ( $negate ) {
if ( is_wp_error( $editor->negate() ) ) {
return false;
}
}
}
if ( isset( $opacity ) ) {
if ( is_wp_error( $editor->opacity( $opacity ) ) ) {
return false;
}
}
if ( isset( $grayscale ) ) {
if ( $grayscale ) {
if ( is_wp_error( $editor->grayscale() ) ) {
return false;
}
}
}
if ( isset( $color ) ) {
if ( is_wp_error( $editor->colorize( $color ) ) ) {
return false;
}
}
// save our new image
$mime_type = isset( $opacity ) ? 'image/png' : null;
$resized_file = $editor->save($destfilename, $mime_type);
}
//return the output
if($single) {
$image = $img_url;
} else {
//array return
$image = array (
0 => $img_url,
1 => isset($dst_w) ? $dst_w : $orig_w,
2 => isset($dst_h) ? $dst_h : $orig_h,
);
}
return $image;
}
/** Shortens a number into a base 36 string
*
* @param $number string a string of numbers to convert
* @param $fromBase starting base
* @param $toBase base to convert the number to
* @return string base converted characters
*/
protected static function base_convert_arbitrary($number, $fromBase, $toBase) {
$digits = '0123456789abcdefghijklmnopqrstuvwxyz';
$length = strlen($number);
$result = '';
$nibbles = array();
for ($i = 0; $i < $length; ++$i) {
$nibbles[$i] = strpos($digits, $number[$i]);
}
do {
$value = 0;
$newlen = 0;
for ($i = 0; $i < $length; ++$i) {
$value = $value * $fromBase + $nibbles[$i];
if ($value >= $toBase) {
$nibbles[$newlen++] = (int)($value / $toBase);
$value %= $toBase;
}
else if ($newlen > 0) {
$nibbles[$newlen++] = 0;
}
}
$length = $newlen;
$result = $digits[$value].$result;
}
while ($newlen != 0);
return $result;
}
}
}
// don't use the default resizer since we want to allow resizing to larger sizes (than the original one)
// Parts are copied from media.php
// Crop is always applied (just like timthumb)
add_filter('image_resize_dimensions', 'bfi_image_resize_dimensions', 10, 5);
if ( !function_exists( 'bfi_image_resize_dimensions' ) ) {
function bfi_image_resize_dimensions($payload, $orig_w, $orig_h, $dest_w, $dest_h, $crop = false) {
$aspect_ratio = $orig_w / $orig_h;
$new_w = $dest_w;
$new_h = $dest_h;
if ( !$new_w ) {
$new_w = intval($new_h * $aspect_ratio);
}
if ( !$new_h ) {
$new_h = intval($new_w / $aspect_ratio);
}
$size_ratio = max($new_w / $orig_w, $new_h / $orig_h);
$crop_w = round($new_w / $size_ratio);
$crop_h = round($new_h / $size_ratio);
$s_x = floor( ($orig_w - $crop_w) / 2 );
$s_y = floor( ($orig_h - $crop_h) / 2 );
// the return array matches the parameters to imagecopyresampled()
// int dst_x, int dst_y, int src_x, int src_y, int dst_w, int dst_h, int src_w, int src_h
return array( 0, 0, (int) $s_x, (int) $s_y, (int) $new_w, (int) $new_h, (int) $crop_w, (int) $crop_h );
}
}
// This function allows us to latch on WP image functions such as
// the_post_thumbnail, get_image_tag and wp_get_attachment_image_src
// so that you won't have to use the function bfi_thumb in order to do resizing.
// To make this work, in the WP image functions, when specifying an
// array for the image dimensions, add a 'bfi_thumb' => true to
// the array, then add your normal $params arguments.
//
// e.g. the_post_thumbnail( array( 1024, 400, 'bfi_thumb' => true, 'grayscale' => true ) );
add_filter( 'image_downsize', 'bfi_image_downsize', 1, 3 );
if ( !function_exists( 'bfi_image_downsize' ) ) {
function bfi_image_downsize( $out, $id, $size ) {
if ( ! is_array( $size ) ) {
return false;
}
if ( ! array_key_exists( 'bfi_thumb', $size ) ) {
return false;
}
if ( empty( $size['bfi_thumb'] ) ) {
return false;
}
$img_url = wp_get_attachment_url( $id );
$params = $size;
$params['width'] = $size[0];
$params['height'] = $size[1];
$resized_img_url = bfi_thumb( $img_url, $params );
return array( $resized_img_url, $size[0], $size[1], false );
}
}