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Create an image size with B&W image in Wordpress on regenerate thumbnails

0

Looking for a way to regenerate all my featured images and that it will create a new image size in B&W,

I know this can be done in CSS but I need to pull this image with REST to a JS canvas application and cannot use CSS,

I found this code but it does not seem to work in my case,
It works on some pages with I upload images but not when I upload the image to a post, also I was wondering if there is a way to do this with Regenerate of all the thumbnails on site and not on upload.

add_action('after_setup_theme','themename_bw_size');
function themename_bw_size() 
 add_image_size('themename-bw-image', 100, 100, true);


add_filter('wp_generate_attachment_metadata','themename_bw_filter');
function themename_bw_filter($meta) 
 $file = wp_upload_dir();
 $file = trailingslashit($file['path']).$meta['sizes']['themename-bw-image']['file'];
 list($orig_w, $orig_h, $orig_type) = @getimagesize($file);
 $image = wp_load_image($file);
 imagefilter($image, IMG_FILTER_GRAYSCALE);
 switch ($orig_type) 
 case IMAGETYPE_GIF:
 imagegif( $image, $file );
 break;
 case IMAGETYPE_PNG:
 imagepng( $image, $file );
 break;
 case IMAGETYPE_JPEG:
 imagejpeg( $image, $file );
 break;
 
 return $meta;

Thanks!

php wordpress image

share|improve this question

asked Mar 7 at 14:25

Alon KatziriAlon Katziri

1

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Hello Alon, welcome to SO. What exactly does not seem to work?
  
  – Olafant
  Mar 7 at 17:02
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Where have you added this code? Also, is there are reason you're using calling add_image_size is the after_setup_theme action?
  
  – FluffyKitten
  Mar 7 at 21:29
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  The code does create a new image size, what I'm looking for is to get the code to create the new B&W image size with the greyscale filter when regenerating the thumbnails. I have more then 600 images on site I would like to create a B&W image from,
  
  – Alon Katziri
  Mar 8 at 20:55
  

  
  
  
  

add a comment | 

0

Looking for a way to regenerate all my featured images and that it will create a new image size in B&W,

I know this can be done in CSS but I need to pull this image with REST to a JS canvas application and cannot use CSS,

I found this code but it does not seem to work in my case,
It works on some pages with I upload images but not when I upload the image to a post, also I was wondering if there is a way to do this with Regenerate of all the thumbnails on site and not on upload.

add_action('after_setup_theme','themename_bw_size');
function themename_bw_size() 
 add_image_size('themename-bw-image', 100, 100, true);


add_filter('wp_generate_attachment_metadata','themename_bw_filter');
function themename_bw_filter($meta) 
 $file = wp_upload_dir();
 $file = trailingslashit($file['path']).$meta['sizes']['themename-bw-image']['file'];
 list($orig_w, $orig_h, $orig_type) = @getimagesize($file);
 $image = wp_load_image($file);
 imagefilter($image, IMG_FILTER_GRAYSCALE);
 switch ($orig_type) 
 case IMAGETYPE_GIF:
 imagegif( $image, $file );
 break;
 case IMAGETYPE_PNG:
 imagepng( $image, $file );
 break;
 case IMAGETYPE_JPEG:
 imagejpeg( $image, $file );
 break;
 
 return $meta;

Thanks!

php wordpress image

share|improve this question

asked Mar 7 at 14:25

Alon KatziriAlon Katziri

1

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Hello Alon, welcome to SO. What exactly does not seem to work?
  
  – Olafant
  Mar 7 at 17:02
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Where have you added this code? Also, is there are reason you're using calling add_image_size is the after_setup_theme action?
  
  – FluffyKitten
  Mar 7 at 21:29
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  The code does create a new image size, what I'm looking for is to get the code to create the new B&W image size with the greyscale filter when regenerating the thumbnails. I have more then 600 images on site I would like to create a B&W image from,
  
  – Alon Katziri
  Mar 8 at 20:55
  

  
  
  
  

add a comment | 

Looking for a way to regenerate all my featured images and that it will create a new image size in B&W,

I know this can be done in CSS but I need to pull this image with REST to a JS canvas application and cannot use CSS,

I found this code but it does not seem to work in my case,
It works on some pages with I upload images but not when I upload the image to a post, also I was wondering if there is a way to do this with Regenerate of all the thumbnails on site and not on upload.

add_action('after_setup_theme','themename_bw_size');
function themename_bw_size() 
 add_image_size('themename-bw-image', 100, 100, true);


add_filter('wp_generate_attachment_metadata','themename_bw_filter');
function themename_bw_filter($meta) 
 $file = wp_upload_dir();
 $file = trailingslashit($file['path']).$meta['sizes']['themename-bw-image']['file'];
 list($orig_w, $orig_h, $orig_type) = @getimagesize($file);
 $image = wp_load_image($file);
 imagefilter($image, IMG_FILTER_GRAYSCALE);
 switch ($orig_type) 
 case IMAGETYPE_GIF:
 imagegif( $image, $file );
 break;
 case IMAGETYPE_PNG:
 imagepng( $image, $file );
 break;
 case IMAGETYPE_JPEG:
 imagejpeg( $image, $file );
 break;
 
 return $meta;

Thanks!

php wordpress image

share|improve this question

asked Mar 7 at 14:25

Alon KatziriAlon Katziri

1

add_action('after_setup_theme','themename_bw_size');
function themename_bw_size() 
 add_image_size('themename-bw-image', 100, 100, true);


add_filter('wp_generate_attachment_metadata','themename_bw_filter');
function themename_bw_filter($meta) 
 $file = wp_upload_dir();
 $file = trailingslashit($file['path']).$meta['sizes']['themename-bw-image']['file'];
 list($orig_w, $orig_h, $orig_type) = @getimagesize($file);
 $image = wp_load_image($file);
 imagefilter($image, IMG_FILTER_GRAYSCALE);
 switch ($orig_type) 
 case IMAGETYPE_GIF:
 imagegif( $image, $file );
 break;
 case IMAGETYPE_PNG:
 imagepng( $image, $file );
 break;
 case IMAGETYPE_JPEG:
 imagejpeg( $image, $file );
 break;
 
 return $meta;

share|improve this question

asked Mar 7 at 14:25

Alon KatziriAlon Katziri

1

share|improve this question

asked Mar 7 at 14:25

Alon KatziriAlon Katziri

1

asked Mar 7 at 14:25

Alon KatziriAlon Katziri

1

asked Mar 7 at 14:25

Alon KatziriAlon Katziri

1