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Bump libakgl to 42b60f7: every gap this port filed is now closed

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All four capability gaps filed against libakgl have landed upstream, so nothing
in this repository is waiting on that library any more.

  text measurement   -> akgl_text_measure, akgl_text_measure_wrapped
  immediate drawing  -> akgl_draw_point/_line/_rect/_filled_rect/_circle/
                        _flood_fill/_copy_region/_paste_region
  audio              -> akgl_audio_init/_tone/_envelope/_waveform/_volume/
                        _stop/_voice_active/_mix
  console input      -> akgl_controller_poll_key, akgl_controller_flush_keys

The signatures came back close to what was filed, and two details are worth
recording for whoever writes src/sink_akgl.c next. The draw calls take an
akgl_RenderBackend * as their first argument rather than reaching for a global
renderer, which fits goal 3's rule that the interpreter draws through whatever
renderer the host already initialized. And the audio API is a synthesised-voice
one -- a tone on a numbered voice plus a separate ADSR envelope -- which is the
shape PLAY and ENVELOPE actually need, rather than the sample playback
SDL3_mixer would have offered.

Checked rather than assumed: libakgl's status band is still 256-260, so the
coordinated range map in CLAUDE.md is unaffected and akbasic's 512-767 does not
move.

Documentation that described these as open is corrected in the same commit --
section 7's gap list, section 3's "known gap" note, the priority list, the
dependency table, and the README's unimplemented-verbs section all said blocked
and no longer are. Section 3 also gains the thing that replaced the gap: the
character grid comes from akgl_text_measure(font, "A", &w, &h), the direct
equivalent of the font.SizeUTF8("A") at basicruntime.go:96, and
akgl_text_measure_wrapped takes the same wraplength argument
akgl_text_rendertextat does so the measurement and the draw cannot disagree
about where a line breaks.

One caveat recorded rather than papered over: -DAKBASIC_WITH_AKGL=ON has never
been configured in this repository, because until now there was nothing to build
against. The akbasic_akgl target is unproven and needs libakgl's own submodules
present. Expect to fix something there on the first attempt.

Default build unaffected: ctest 61/61, doxygen exits 0, no warnings.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
This commit is contained in:
Andrew Kesterson
2026-07-31 07:56:02 -04:00
parent 506af093a1
commit 7f16337a16
3 changed files with 51 additions and 24 deletions
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2
deps/libakgl vendored

Submodule deps/libakgl updated: 5f03475e0f...42b60f725d