Fix #105325: crash calling asset_generate_preview() in backgound mode #106046

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Philipp Oeser merged 1 commits from lichtwerk/blender:105325 into main 2023-03-24 09:17:12 +01:00
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.asset_generate_preview() internally calls UI_icon_render_id as a
job -- as opposed to .preview_ensure() [which internally also calls
UI_icon_render_id, but not as a job] leading to crashes in background
mode.

This might be due to the fact that OpenGL context is not set up
correctly (so there might be other ways to fix this), but there seems to
be other places/comments indicating that icon handling is only for main
thread (see e.g. 13beeb5892).
And while this does not fully explain why doing this with jobs works fine
from the UI, the patch certainly fixes the crashes in background mode for
now (by not using jobs).

`.asset_generate_preview()` internally calls `UI_icon_render_id` as a job -- as opposed to `.preview_ensure()` [which internally also calls `UI_icon_render_id`, but not as a job] leading to crashes in background mode. This might be due to the fact that OpenGL context is not set up correctly (so there might be other ways to fix this), but there seems to be other places/comments indicating that icon handling is only for main thread (see e.g. 13beeb589227). And while this does not fully explain why doing this with jobs works fine from the UI, the patch certainly fixes the crashes in background mode for now (by not using jobs).
Philipp Oeser added this to the Pipeline, Assets & IO project 2023-03-23 15:17:50 +01:00
Philipp Oeser requested review from Bastien Montagne 2023-03-23 15:17:58 +01:00
Philipp Oeser requested review from Sybren A. Stüvel 2023-03-23 15:18:08 +01:00
Philipp Oeser added the
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Python API
label 2023-03-23 15:18:19 +01:00
Sybren A. Stüvel approved these changes 2023-03-23 15:23:22 +01:00
Sybren A. Stüvel left a comment
Member

Nice find! Just one simplification, since I don't quite like comparisons to == false or == true. Can be merged without re-review though.

Nice find! Just one simplification, since I don't quite like comparisons to `== false` or `== true`. Can be merged without re-review though.
@ -53,3 +54,3 @@
}
UI_icon_render_id(C, nullptr, id, ICON_SIZE_PREVIEW, true);
UI_icon_render_id(C, nullptr, id, ICON_SIZE_PREVIEW, (G.background == false));

I'd shorten this to !G.background.

I'd shorten this to `!G.background`.
lichtwerk marked this conversation as resolved
Bastien Montagne approved these changes 2023-03-23 17:50:12 +01:00
Philipp Oeser force-pushed 105325 from ef7f757d0a to 19b36ca24a 2023-03-24 09:13:53 +01:00 Compare
Philipp Oeser merged commit 2fba27e6d8 into main 2023-03-24 09:17:12 +01:00
Philipp Oeser deleted branch 105325 2023-03-24 09:17:13 +01:00
Bastien Montagne removed this from the Pipeline, Assets & IO project 2023-07-03 13:01:30 +02:00
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Reference: blender/blender#106046
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