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@Pirenko Pirenko/vt_resize.php
Last active Nov 14, 2015

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vt_resize.php
<?php
/*
* Resize images dynamically using wp built in functions
* Victor Teixeira
* Tweaked by Pirenko
*
* php 5.2+
*
* Usage Sample:
*
* <?php
* $thumb = get_post_thumbnail_id();
* $image = vt_resize( $thumb, '', 140, 110, true );
* ?>
*
* @param int $attach_id
* @param string $img_url
* @param int $width
* @param int $height
* @param bool $crop
* @param bool $retina
* @return array
*/
if ( ! function_exists( 'vt_resize' ) ) :
function vt_resize( $attach_id = null, $img_url = null, $width = 0, $height = 0, $crop = false , $retina = false) {
global $blog_id;
$divider=1;
if ($retina==true)
{
$width=$width*2;
$height=$height*2;
$divider=2;
}
// this is an attachment, so we have the ID
if ( $attach_id ) {
$image_src = wp_get_attachment_image_src( $attach_id, 'full' );
$file_path = get_attached_file( $attach_id );
// this is not an attachment, let's use the image url
} else if ( $img_url ) {
$file_path = parse_url( $img_url );
$file_path = $_SERVER['DOCUMENT_ROOT'] . $file_path['path'];
if (!file_exists($file_path)) {
// Double check for some kind of virtual path that fails with $_SERVER['DOCUMENT_ROOT']
$imageParts = explode(site_url(), $img_url, 2);
if (isset($imageParts[1])) {
$file_path = ABSPATH . $imageParts[1];
}
// if not found with the backup path...
if (!file_exists($file_path)) {
// simple fix for direct links to images on multi-site installs
if (isset($blog_id) && $blog_id > 0) {
// uploaded images to media folders
$imageParts = explode('/files/', $img_url, 2);
if (isset($imageParts[1])) {
$img_url = get_site_url(1) .'/wp-content/blogs.dir/'. $blog_id .'/files/'. $imageParts[1];
$file_path = parse_url( $img_url );
$file_path = $_SERVER['DOCUMENT_ROOT'] . $file_path['path'];
}
// if not found in media folders check theme folders
if (!file_exists($file_path)) {
// files in the theme folder
$imageParts = explode('THEME_URL', $img_url, 2);
if (isset($imageParts[1])) {
$file_path = THEME_DIR . $imageParts[1];
}
}
}
}
}
//$file_path = ltrim( $file_path['path'], '/' );
//$file_path = rtrim( ABSPATH, '/' ).$file_path['path'];
if (file_exists($file_path)) {
$orig_size = getimagesize( $file_path );
$image_src[0] = $img_url;
$image_src[1] = $orig_size[0];
$image_src[2] = $orig_size[1];
if (0)
{
//ORIGINAL IMAGE IS BIGGER - DO NOTHING
$vt_image = array (
'url' => $img_url,
'width' => $orig_size[0],
'height' => $orig_size[1],
'not_found' => 'false'
);
return $vt_image;
}
} else {
// couldn't find the image so set the values back to what was provided and return
$vt_image = array (
'url' => $img_url,
'width' => $width,
'height' => $height,
'not_found' => 'true'
);
return $vt_image;
}
}
$file_info = pathinfo($file_path);
//ID WAS RECEIVED, BUT NO IMAGE WAS FOUND
if ($file_info['basename']=="") {
return;
}
$extension = '.'. $file_info['extension'];
//EXCLUDE GIF FILES
if($extension ==".gif")
{
$vt_image = array (
'url' => $img_url,
'width' => $width,
'height' => $height,
'not_found' => 'false'
);
return $vt_image;
}
// the image path without the extension
$no_ext_path = $file_info['dirname'].'/'.$file_info['filename'];
$cropped_img_path = $no_ext_path.'-'.$width.'x'.$height.$extension;
// if no image size was sent... use the original
if (!$width) $width = $image_src[1];
if (!$height) $height = $image_src[2];
//FORCE SMALL IMAGES TO APPEAR BIGGER
if ($image_src[1] < $width)
$image_src[1]=$width+2;
if ($image_src[2] < $height )
$image_src[2] = $height+2;
if ( $image_src[1] > $width || $image_src[2] > $height ) {
// the file is larger, check if the resized version already exists (for $crop = true but will also work for $crop = false if the sizes match)
if ( file_exists( $cropped_img_path ) ) {
$cropped_img_url = str_replace( basename( $image_src[0] ), basename( $cropped_img_path ), $image_src[0] );
$vt_image = array (
'url' => $cropped_img_url,
'width' => $width/$divider,
'height' => $height/$divider,
'not_found' => 'false'
);
return $vt_image;
}
// $crop = false
if ( $crop == false ) {
// calculate the size proportionaly
$proportional_size = wp_constrain_dimensions( $image_src[1], $image_src[2], $width, $height );
$resized_img_path = $no_ext_path.'-'.$proportional_size[0].'x'.$proportional_size[1].$extension;
// checking if the file already exists
if ( file_exists( $resized_img_path ) ) {
$resized_img_url = str_replace( basename( $image_src[0] ), basename( $resized_img_path ), $image_src[0] );
$vt_image = array (
'url' => $resized_img_url,
'width' => $proportional_size[0]/$divider,
'height' => $proportional_size[1]/$divider,
'not_found' => 'false'
);
return $vt_image;
}
}
// no cache files - let's finally resize it
// .............................................................
// first, make sure the directory is writable.
if (is_writable($file_info['dirname'].'/')) {
// it's writable, let's do some resizing!
//WP 3.5 compatible
//$new_img_path = image_resize( $file_path, $width, $height, $crop, NULL, NULL, 100 );
$editor = wp_get_image_editor( $file_path );
if ( is_wp_error( $editor ) ) {
//SOMETHING WENT WRONG. PROBABLY THE GD LIBRARY IS OFF:http://bhoover.com/wp_image_editor_supports-tutorial-example/
//LET'S RETURN THE ORIGINAL IMAGE
$vt_image = array (
'url' => $img_url,
'width' => $width,
'height' => $height,
'not_found' => 'false');
return $vt_image;
}
$editor->set_quality( 88 );
$resized = $editor->resize( $width, $height, $crop );
$dest_file = $editor->generate_filename( NULL, NULL );
$saved = $editor->save( $dest_file );
if ( is_wp_error( $saved ) ) {
//SOMETHING WENT WRONG. PROBABLY THE GD LIBRARY IS OFF:http://bhoover.com/wp_image_editor_supports-tutorial-example/
//LET'S RETURN THE ORIGINAL IMAGE
//CHECK IF WE RECEIVED AN ID
if ($img_url=="")
{
$img_url=$image_src[0];
}
$vt_image = array (
'url' => $img_url,
'width' => $width,
'height' => $height,
'not_found' => 'false');
return $vt_image;
}
$new_img_path=$dest_file;
//END WP 3.5 compatible
if (is_string($new_img_path)) {
$new_img_size = getimagesize( $new_img_path );
$new_img = str_replace( basename( $image_src[0] ), basename( $new_img_path ), $image_src[0] );
} else {
// nope, something is preventing the image from resizing
$new_img_size[0] = $width/$divider;
$new_img_size[1] = $height/$divider;
$new_img = $img_url;
}
} else {
// nope, directory isn't writable. return the original file info
$new_img_size[0] = $width/$divider;
$new_img_size[1] = $height/$divider;
$new_img = $img_url;
}
// set image data for output
$vt_image = array (
'url' => $new_img,
'width' => $new_img_size[0]/$divider,
'height' => $new_img_size[1]/$divider,
'not_found' => 'false'
);
return $vt_image;
}
// default output - without resizing
$vt_image = array (
'url' => $image_src[0],
'width' => $image_src[1]/$divider,
'height' => $image_src[2]/$divider,
'not_found' => 'false'
);
return $vt_image;
}
endif;
//ALLOW IMAGE ENLARGE - ONLY WHEN CROP IS SET TO TRUE
function image_crop_dimensions($default, $orig_w, $orig_h, $new_w, $new_h, $crop){
if ( !$crop ) return null; // let the wordpress default function handle this
$aspect_ratio = $orig_w / $orig_h;
$size_ratio = max($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 );
return array( 0, 0, (int) $s_x, (int) $s_y, (int) $new_w, (int) $new_h, (int) $crop_w, (int) $crop_h );
}
add_filter('image_resize_dimensions', 'image_crop_dimensions', 10, 6);
?>
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