From 96a30a0450384eaeda21f234911f947952c4dcde Mon Sep 17 00:00:00 2001 From: Joseph Turner Date: Sat, 23 Mar 2024 13:29:17 -0700 Subject: [PATCH] copy-tree just image map, not entire image. * lisp/image.el (image--compute-original-map): --- lisp/image.el | 27 +++++++++++++-------------- 1 file changed, 13 insertions(+), 14 deletions(-) diff --git a/lisp/image.el b/lisp/image.el index 55340ea03dc..d7496485aca 100644 --- a/lisp/image.el +++ b/lisp/image.el @@ -1455,24 +1455,23 @@ image--compute-original-map If IMAGE lacks :map property, return nil. When :rotation is not a multiple of 90, return copy of :map." (when (image-property image :map) - (let* ((image-copy (copy-tree image t)) - (map (image-property image-copy :map)) - (scale (or (image-property image-copy :scale) 1)) - (rotation (or (image-property image-copy :rotation) 0)) - (flip (image-property image-copy :flip)) - (size (image-size image-copy t))) + (let* ((original-map (copy-tree (image-property image :map) t)) + (scale (or (image-property image :scale) 1)) + (rotation (or (image-property image :rotation) 0)) + (flip (image-property image :flip)) + (size (image-size image t))) (when (and ; Handle only 90-degree rotations (zerop (mod rotation 1)) (zerop (% (truncate rotation) 90))) ;; In rendered images, rotation is always applied before flip. - ;; To undo the transformation, flip before rotating. - ;; SIZE fits MAP before it is transformed back to ORIGINAL-MAP. - ;; Therefore, scale MAP after flip and rotate operations, since - ;; both need MAP to fit SIZE. - (image--flip-map map flip size) - (image--rotate-map map (- rotation) size) - (image--scale-map map (/ 1.0 scale))) - map))) + ;; To undo the transformation, flip before rotating. SIZE fits + ;; ORIGINAL-MAP before transformations are applied. Therefore, + ;; scale ORIGINAL-MAP after flip and rotate operations, since + ;; both need ORIGINAL-MAP to fit SIZE. + (image--flip-map original-map flip size) + (image--rotate-map original-map (- rotation) size) + (image--scale-map original-map (/ 1.0 scale))) + original-map))) (defun image--scale-map (map scale) "Scale MAP according to SCALE. -- 2.41.0