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Fix #54468: crash calling transform operators with incomplete regiondata #119205

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Philipp Oeser merged 2 commits from lichtwerk/blender:54468 into blender-v4.1-release 2024-03-11 09:27:42 +01:00
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Philipp Oeser commented 2024-03-08 13:49:19 +01:00
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If we run into NULL RegionView3D regiondata [which e.g. happens if
we just set bpy.context.area.type = 'VIEW_3D' without further actions
in the text editor prior to calling the transform operator], we can make
it gracefully work just by using t->spacetype = SPACE_EMPTY in
initTransInfo.

Similar check is already done in ba229e3859 (marked /* running in the
text editor */).

Transform code is smart enough to have fallback code in place that sets
matrices etc.

If we run into NULL `RegionView3D` `regiondata` [which e.g. happens if we just set `bpy.context.area.type = 'VIEW_3D'` without further actions in the text editor prior to calling the transform operator], we can make it gracefully work just by using `t->spacetype = SPACE_EMPTY` in `initTransInfo`. Similar check is already done in ba229e38597c (marked /* running in the text editor */). Transform code is smart enough to have fallback code in place that sets matrices etc.
Philipp Oeser added 1 commit 2024-03-08 13:49:28 +01:00
b67ebea8ec Fix #54468: crash calling transform operators with incomplete regiondata 
If we run into NULL `RegionView3D` `regiondata` [which e.g. happens if
we just set `bpy.context.area.type = 'VIEW_3D'` without further actions
in the text editor prior to calling the transform operator], we can make
it gracefully work just by using `t->spacetype = SPACE_EMPTY` in
`initTransInfo`.

Similar check is already done in ba229e3859 (marked /* running in the
text editor */).

Transform code is smart enough to have fallback code in place that sets
matrices etc.
Philipp Oeser added this to the Python API project 2024-03-08 13:49:52 +01:00
Philipp Oeser added the
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Philipp Oeser requested review from Campbell Barton 2024-03-08 13:50:09 +01:00
Philipp Oeser requested review from Germano Cavalcante 2024-03-08 13:50:19 +01:00
Philipp Oeser commented 2024-03-08 13:52:14 +01:00
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Note : there are probably other operators (not just transform) that have the same problem, havent checked those though (for those, it might mke sense to be more strict in a poll -- but since transform code can handle this gracefully, this PR only handles that for now)

Note : there are probably other operators (not just transform) that have the same problem, havent checked those though (for those, it might mke sense to be more strict in a poll -- but since transform code can handle this gracefully, this PR only handles that for now)
Germano Cavalcante approved these changes 2024-03-08 14:24:07 +01:00
source/blender/editors/transform/transform_generics.cc Outdated
@ -243,1 +242,4 @@
else if (((region == nullptr) || (region->regiondata == nullptr)) &&
(area->spacetype == SPACE_VIEW3D))
{
/* running in the text editor */
Germano Cavalcante commented 2024-03-08 14:23:56 +01:00
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I think we could take advantage and improve the comment here to something like:

/* Running the operator through the text editor where `area.type` was set to 'VIEW_3D' but the viewport was not updated. */

I wonder how the previous condition was triggered... When the region is nullptr? Maybe it's worth including in the comment too.

And, just to make it clearer that the problem is when setting VIEW_3D, it may be interesting to put (area->spacetype == SPACE_VIEW3D) before.

In any case, LGTM.

I think we could take advantage and improve the comment here to something like: ``` /* Running the operator through the text editor where `area.type` was set to 'VIEW_3D' but the viewport was not updated. */ ``` I wonder how the previous condition was triggered... When the region is nullptr? Maybe it's worth including in the comment too. And, just to make it clearer that the problem is when setting `VIEW_3D`, it may be interesting to put `(area->spacetype == SPACE_VIEW3D)` before. In any case, LGTM.
Campbell Barton approved these changes 2024-03-11 05:17:28 +01:00
Philipp Oeser added 1 commit 2024-03-11 09:13:11 +01:00
Philipp Oeser merged commit a8b9a58608 into blender-v4.1-release 2024-03-11 09:27:42 +01:00
Philipp Oeser deleted branch 54468 2024-03-11 09:27:47 +01:00
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