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72c53dcb13
This adds support for animations with heterogeneous frame durations without sacrificing CPU (bug#47895), and plugs a memory leak in and speeds up WebP animations (bug#66221). * lisp/image.el (image-animate): No need to stash image-multi-frame-p data here, as image-animate-timeout now refetches it for each animation frame. (image-show-frame): Fetch image-multi-frame-p anew when checking bounds; a cached value risks going stale. This is not on the hot path for animations, and is mainly used when framewise stepping through an animation interactively. (image-animate-timeout): Fetch current frame duration anew but do so before image-show-frame to ensure an image cache hit (bug#47895, bug#66221). Include time taken by local arithmetic in 'time-to-load-image'. Update commentary. * src/image.c (parse_image_spec): Simplify using FIXNATP. (filter_image_spec): Remove check for :animate-multi-frame-data as it is no longer used by image.el. [HAVE_ANIMATION && HAVE_GIF] (struct gif_anim_handle): [HAVE_ANIMATION && HAVE_WEBP] (struct webp_anim_handle): New structures formalizing animation cache handles, and allowing for more than two custom fields per image type. (struct anim_cache): Replace generic handle and temp pointers with a union of gif_anim_handle and webp_anim_handle. All uses updated. Update destructor signature accordingly. (anim_create_cache): Use xzalloc to zero-initialize both integer and pointer fields. Initialize frames, width, height to -1 for consistency with index. Mark as ATTRIBUTE_MALLOC. (anim_prune_animation_cache): Check whether destructor (not handle) is null before calling it. (gif_clear_image): Note in commentary that WebP also uses it. (gif_destroy): Free pixmap here now that prune_anim_cache no longer does it automatically. Remove unused gif_err variable. (gif_load): Avoid UB from casting destructor to a different type. Don't redundantly check for null before xfree. Change default frame delay from 15fps to t, which image-multi-frame-p will translate into image-default-frame-delay, which the user can control. [HAVE_WEBP && WINDOWSNT] (init_webp_functions): Reconcile library definitions with current webp_load implementation. (webp_destroy): Free owned copy of input WebP bitstream contents. (webp_load): Ownership of both input and decoded memory is a function of :data vs :file and animated vs still. Make this and transfers of ownership to animation cache clearer by using distinct copy/view variables. Also make resource freeing clearer by using a single unconditional cleanup and exit path. Check animation cache early to avoid rereading bitstream and reparsing headers on each call. Remove redundant call to WebPGetInfo since WebPGetFeatures does the same thing. Check more libwebpdemux return values for failure and fix file name reported in error messages. Remove unset local variable 'file'. If requested :index is ahead, fast-forward instead of restarting from first frame. If requested :index is behind, reset animation decoder to first frame instead of deleting and recreating it. Reuse animation decoder's own WebPAnimInfo and WebPDemuxer instance instead of creating and deleting a separate WebPDemuxer. Fix leak when copying :data to animation cache. Fix frame duration calculation, and return each frame's own duration now that image.el supports it. Return t as a default frame duration, as per gif_load. Consistently use WebPBitstreamFeatures to simplify control flow. Don't pollute lisp_data image-metadata for still images with animation-related properties. (image_types) [HAVE_WEBP]: Use gif_clear_image to clear lisp_data for consistency with GIF code. (syms_of_image): Remove QCanimate_multi_frame_data; no longer used. |
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| BUGS | ||
| ChangeLog.1 | ||
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| ChangeLog.android | ||
| config.bat | ||
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| CONTRIBUTE | ||
| COPYING | ||
| GNUmakefile | ||
| INSTALL | ||
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| make-dist | ||
| Makefile.in | ||
| README | ||
Copyright (C) 2001-2026 Free Software Foundation, Inc.
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