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GeezerVison is showing github.com — pdf: Simplify Type 3 font character encoding by QuLogic · Pull Request #30520 · matplotlib/matplotlib

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@QuLogic

@QuLogic QuLogic commented Sep 6, 2025

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PR summary

For a Type 3 font, its encoding is entirely defined by its Encoding dictionary (which we create), so there's no reason to use a specific encoding like cp1252. Instead, switch to Latin-1, which corresponds exactly to the first 256 character codes in Unicode, and can be mapped directly with ord.

Split out of #30512.

PR checklist

  • [n/a] "closes #0000" is in the body of the PR description to link the related issue
  • new and changed code is tested
  • [n/a] Plotting related features are demonstrated in an example
  • [n/a] New Features and API Changes are noted with a directive and release note
  • [n/a] Documentation complies with general and docstring guidelines

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@QuLogic
pdf: Simplify Type 3 font character encoding
258de53 
For a Type 3 font, its encoding is entirely defined by its `Encoding`
dictionary (which we create), so there's no reason to use a specific
encoding like `cp1252`. Instead, switch to Latin-1, which corresponds
exactly to the first 256 character codes in Unicode, and can be mapped
directly with `ord`.
@QuLogic QuLogic added this to the v3.11.0 milestone Sep 6, 2025
@QuLogic QuLogic added the backend: pdf label Sep 6, 2025
@QuLogic QuLogic added this to Font and text overhaul Sep 6, 2025
@github-project-automation github-project-automation Bot moved this to Waiting for other PR in Font and text overhaul Sep 6, 2025
@QuLogic QuLogic mentioned this pull request Sep 6, 2025
pdf: Improve text with characters outside embedded font limits #30512
Merged
4 tasks done
@QuLogic QuLogic moved this from Waiting for other PR to Ready for Review in Font and text overhaul Sep 6, 2025
anntzer
anntzer approved these changes Sep 8, 2025
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timhoffm
timhoffm approved these changes Sep 8, 2025
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@QuLogic
QuLogic merged commit bb37cf9 into matplotlib:text-overhaul Sep 8, 2025
@github-project-automation github-project-automation Bot moved this from Ready for Review to Done in Font and text overhaul Sep 8, 2025
@QuLogic
QuLogic deleted the pdf-simplify-type3 branch September 8, 2025 20:26
wavebyrd pushed a commit to wavebyrd/matplotlib that referenced this pull request Mar 13, 2026
@QuLogic
Merge pull request matplotlib#30520 from QuLogic/pdf-simplify-type3
e40e731 
pdf: Simplify Type 3 font character encoding
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@anntzer anntzer anntzer approved these changes
@timhoffm timhoffm timhoffm approved these changes

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backend: pdf

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Font and text overhaul
Status: Done

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v3.11.0

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3 participants

@QuLogic @anntzer @timhoffm
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