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- function ks_sharpen_resized_files( $resized_file ) {
- $image = imagecreatefromstring( file_get_contents( $resized_file ) );
- if ( !is_resource( $image ) )
- return new WP_Error( 'error_loading_image', $image, $file );
- $size = @getimagesize( $resized_file );
- if ( !$size )
- return new WP_Error('invalid_image', __('Could not read image size'), $file);
- list($orig_w, $orig_h, $orig_type) = $size;
- switch ( $orig_type ) {
- case IMAGETYPE_JPEG:
- $matrix = array(
- array(-1, -1, -1),
- array(-1, 16, -1),
- array(-1, -1, -1),
- );
- $divisor = array_sum(array_map('array_sum', $matrix));
- $offset = 0;
- imageconvolution($image, $matrix, $divisor, $offset);
- imagejpeg($image, $resized_file,apply_filters( 'jpeg_quality', 90, 'edit_image' ));
- break;
- case IMAGETYPE_PNG:
- return $resized_file;
- case IMAGETYPE_GIF:
- return $resized_file;
- }
- return $resized_file;
- }
- add_filter('image_make_intermediate_size', 'ks_sharpen_resized_files',900);
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