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Now, when transforming an image, its :map is recomputed to fit. Image map coordinates are integers, so when computing :map, coordinates are rounded. To prevent an image from drifting from its map after repeated transformations, 'create-image' now adds a new image property :original-map, which is combined with the image's transformation parameters to recompute :map. * lisp/image.el (image-recompute-map-p): Add user option to control whether :map is recomputed when an image is transformed. (create-image): Create :map from :original-map and vice versa. (image--delayed-change-size): Fix comment. (image--change-size, image-rotate, image-flip-horizontally, image-flip-vertically): Recompute image map after transformation and mention 'image-recompute-map-p' in docstring. (image--compute-map): Add function to compute a map from original map. (image--compute-original-map): Add function to compute an original map from map. (image--scale-map): Add function to scale a map based on :scale. (image--rotate-map): Add function to rotate a map based on :rotation. (image--rotate-coord): Add function to rotate a map coordinate pair. (image--flip-map): Add function to flip a map based on :flip. (image-increase-size, image-decrease-size, image-mouse-increase-size) (image-mouse-decrease-size): Mention 'image-recompute-map-p' in docstrings. * etc/NEWS: Add NEWS entry. * doc/lispref/display.texi (Image Descriptors): Document :original-map and new user option 'image-recompute-map-p'. * test/lisp/image-tests.el (image--compute-map-and-original-map): Test 'image--compute-map' and 'image--compute-original-map'. (image-tests--map-equal): Add equality predicate to compare image maps. (image-create-image-with-map): Test that 'create-image' adds :map and/or :original-map as appropriate. (image-transform-map): Test functions related to transforming maps. (Bug#69602) |
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This directory contains the architecture-independent files used by or with Emacs. This includes some text files of documentation for GNU Emacs or of interest to Emacs users, and the file of dumped docstrings for Emacs functions and variables. COPYRIGHT AND LICENSE INFORMATION FOR IMAGE FILES File: emacs.icon Author: Sun Microsystems, Inc Copyright (C) 1999, 2001-2024 Free Software Foundation, Inc. License: GNU General Public License version 3 or later (see COPYING)