I made few thumbs size. But some of them make total resize of original pict or make new with specified sizes from right bottom corner. Is this posible to centrilize thumbs? I meen to make new thumb with specified size but with offset to center / centilize them?
add_theme_support( 'post-thumbnails' );
if ( function_exists( 'add_image_size' ) ) {
add_image_size( 'last-posts-thumb', 0, 160);
add_image_size( 'last-posts-thumb-4-3', 120, 160, true);
}
I tried and use successfully this code which allow to define image size using specific cropping position for this image size :
bt_add_image_size( 'product-screenshot', 300, 300, array( 'left', 'top' ) );It allow centering option so it looks like matching your purpose. I’ve added the code in a separate php file that I included into functions.php
Have you looked at the Tim Thumb script. It might help you with this. http://www.binarymoon.co.uk/2010/08/timthumb-part-4-moving-crop-location/