Repository navigation
Update bundled FreeType and HarfBuzz libraries - #30938
Merged
QuLogic merged 3 commits intoFeb 6, 2026
Merged
QuLogic merged 3 commits into
QuLogic merged 3 commits into
Conversation
Copy link
Copy Markdown
Member
Sorry, something went wrong.
tacaswell
approved these changes
Jan 29, 2026
Copy link
Copy Markdown
Member
Author
|
Not actually waiting for any other PR; just need to drop the image update after approvals. |
Sorry, something went wrong.
QuLogic
force-pushed
the
ft214
branch
2 times, most recently
from
e7e31a7 to
0b4fb2c
Compare
February 3, 2026 09:11
ksunden
approved these changes
Feb 5, 2026
Due to the circular dependency between FreeType and HarfBuzz, this requires a small patch to make FreeType not look for HarfBuzz, allowing it to come from the superproject linkage. While FreeType does support dynamically loading HarfBuzz, this should be a bit safer at avoiding any chance of mixing system with bundled libraries.
wavebyrd
pushed a commit
to wavebyrd/matplotlib
that referenced
this pull request
Mar 13, 2026
Update bundled FreeType and HarfBuzz libraries
QuLogic
added a commit
to QuLogic/matplotlib
that referenced
this pull request
Apr 10, 2026
This includes images changes for the following pull requests / commits: * [Fix center of rotation with rotation_mode='anchor'](matplotlib#29199) (c44db77) * [Remove ttconv backwards-compatibility code](matplotlib#30145) (8caff88) * [Remove kerning_factor from tests](matplotlib#29816) (7b4d725) * [Set text hinting to defaults](matplotlib#29816) (8255ae2) * [Update FreeType to 2.13.3](matplotlib#29816) (89c054d) * [Implement text shaping with libraqm](matplotlib#30000) (b0ded3a, 9813523) * [Add language parameter to Text objects](matplotlib#29794) (7ce8eae) * [Fix auto-sized glyphs with BaKoMa fonts](matplotlib#29936) (3ba2c13) * [pdf: Improve text with characters outside embedded font limits](matplotlib#30512) (b70fb88, 6cedcf7) * [Prepare `CharacterTracker` for advanced font features](matplotlib#30608) (8274e17, 70dc388, df670cf, ed5e074) * [Add font feature API to Text](matplotlib#29695) (972a688) * [Fix spacing in r"$\max f$"](matplotlib#30715) (4a99a83) * [Implement libraqm for vector outputs](matplotlib#30607) (bd17cd4) * [Drop the FT2Font intermediate buffer](matplotlib#30059) (9d7d7b4) * [Rasterize dvi files without dvipng](matplotlib#30039) (7627118) * [Update bundled FreeType and HarfBuzz libraries](matplotlib#30938) (a161658, 9619bcc) * [Fix positioning of wide mathtext accents](matplotlib#31069) (c2fa7ba) * [Refactor RendererAgg.draw_{mathtext,text,tex} to use same base algorithm](matplotlib#31085) (931bcf3) * [Implement TeX's fraction and script alignment](matplotlib#31046) (94ff452, 4bfa0f9, 1cd8510) * [Fix confusion between text height and ascent in metrics calculations](matplotlib#31107) (60f2310) * [mathtext: Fetch quad width & axis height from font metrics](matplotlib#31110) (692df3f, 383028b) * [mathtext: add mathnormal and distinguish between normal and italic family](matplotlib#31121) (a6913f3) * [ENH: Ignore empty text for tightbbox](matplotlib#31285) (d772043) * [Drop axis_artist tickdir image compat, due to text-overhaul merge](matplotlib#31281) (2057583) * [text: Use font metrics to determine line heights](matplotlib#31291) (3ab6a27, d961462, 97f4943) * [ps/pdf: Override font height metrics to support AFM files](matplotlib#31371) (e0913d4) * [TST: Cleanup back-compat code in tests touched by text overhaul](matplotlib#31295) (7c33379) * [TST: Set tests touched by text overhaul to mpl20 style](matplotlib#31300) (41c4d8d)
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
4 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
PR summary
These were released over the last couple of months but I didn't notice them. Note, I have included the new test images here, but this should not be merged until they are removed.
The main changes in HarfBuzz do appear to mostly be speedups and optimizations. Version 12 adds support for the new VARC table, but I don't think that's particularly widespread yet. There are various other bug fixes and rejections of invalid fonts in the smaller releases as well. The other useful change is that they've simplified the search for FreeType, so we can drop our patch for it.
The main change in FreeType is an improvement in the diacritics at small sizes. This is the cause of the mathtext test image changes.
Additionally, FreeType changed the way they use HarfBuzz (yes, there's a dependency loop there) that doesn't require the headers, which makes it possible to enable support. They do support dynamically loading HarfBuzz, but I don't want to run into issues loading the wrong library, so instead I've added a small patch that allows enabling support without explicitly linking HarfBuzz to FreeType. Then the ft2font extension library links to both and this resolves all symbols. Enabling HarfBuzz support improves auto-hinting in OpenType fonts. This causes the change in the Last Resort test image since that is an OpenType font.
To compare the test images on this PR with the current state of the text-overhaul branch, you can use this link https://github.com/QuLogic/matplotlib/compare/text-overhaul-figures..ft214 but unfortunately it also shows all the other images, so you need to look at the few images from this PR specifically.
PR checklist