+ if ( 'image/jpeg' == $this->mime_type ) {
+ /**
+ * Filter the JPEG compression quality for backward-compatibility.
+ *
+ * The filter is evaluated under two contexts: 'image_resize', and 'edit_image',
+ * (when a JPEG image is saved to file).
+ *
+ * @since 2.5.0
+ *
+ * @param int $quality Quality level between 0 (low) and 100 (high) of the JPEG.
+ * @param string $context Context of the filter.
+ */
+ $quality = apply_filters( 'jpeg_quality', $quality, 'image_resize' );
+
+ // Allow 0, but squash to 1 due to identical images in GD, and for backwards compatibility.
+ if ( $quality == 0 ) {
+ $quality = 1;
+ }
+ }
+
+ if ( ( $quality >= 1 ) && ( $quality <= 100 ) ){
+ $this->quality = $quality;
+ return true;
+ } else {
+ return new WP_Error( 'invalid_image_quality', __('Attempted to set image quality outside of the range [1,100].') );
+ }