Blender crashes at OpenGL render if viewport.lock_rotation is True #119058

New Issue

Seb Verkhozin · 2024-03-04T17:08:20+01:00

Seb Verkhozin commented

2024-03-04 17:08:20 +01:00

System Information
Operating system: Windows-10-10.0.19045-SP0 64 Bits
Graphics card: NVIDIA GeForce GTX 980 Ti/PCIe/SSE2 NVIDIA Corporation 4.6.0 NVIDIA 546.17

Blender Version
Broken: version: 4.0.2, branch: blender-v4.0-release, commit date: 2023-12-05 07:41, hash: 9be62e85b727
Worked: (newest version of Blender that worked as expected)

Short description of error
I use region_3d.lock_rotation to imitate flat canvas in my addon. But when viewport rotation is locked OpenGL render crashes Blender. Not big deal if users will use only addon operators, which unlock viewport before rendering, but if not - thats a problem. Confirmed at 4.1 beta and earlier versions as well

Exact steps for others to reproduce the error

Open default blender file and run the code below to lock viewport rotation

import bpy
a = next(iter([i for i in bpy.context.screen.areas if i.type == 'VIEW_3D']))
a.spaces[0].region_3d.lock_rotation = True

In viewport click View -> Viewport Render Image

// or use attached file with code

**System Information** Operating system: Windows-10-10.0.19045-SP0 64 Bits Graphics card: NVIDIA GeForce GTX 980 Ti/PCIe/SSE2 NVIDIA Corporation 4.6.0 NVIDIA 546.17 **Blender Version** Broken: version: 4.0.2, branch: blender-v4.0-release, commit date: 2023-12-05 07:41, hash: `9be62e85b727` Worked: (newest version of Blender that worked as expected) **Short description of error** I use region_3d.lock_rotation to imitate flat canvas in my addon. But when viewport rotation is locked OpenGL render crashes Blender. Not big deal if users will use only addon operators, which unlock viewport before rendering, but if not - thats a problem. Confirmed at 4.1 beta and earlier versions as well **Exact steps for others to reproduce the error** 1. Open default blender file and run the code below to lock viewport rotation ``` import bpy a = next(iter([i for i in bpy.context.screen.areas if i.type == 'VIEW_3D'])) a.spaces[0].region_3d.lock_rotation = True ``` 2. In viewport click View -> Viewport Render Image // or use attached file with code

viewport_lock_rotation_crash.blend

944 KiB

Seb Verkhozin added the

labels 2024-03-04 17:08:21 +01:00

Germano Cavalcante commented

2024-03-04 23:32:43 +01:00

I can confirm the issue.
Here is the call stack at the time of the crash:

Exception thrown: read access violation.
oglrender->region was nullptr.

>	blender.exe!screen_opengl_render_init(bContext * C, wmOperator * op) Line 797	C++
 	blender.exe!screen_opengl_render_invoke(bContext * C, wmOperator * op, const wmEvent * event) Line 1260	C++
 	blender.exe!wm_operator_invoke(bContext * C, wmOperatorType * ot, const wmEvent * event, PointerRNA * properties, ReportList * reports, const bool poll_only, bool use_last_properties) Line 1551	C++
 	blender.exe!wm_operator_call_internal(bContext * C, wmOperatorType * ot, PointerRNA * properties, ReportList * reports, const wmOperatorCallContext context, const bool poll_only, const wmEvent * event) Line 1752	C++
 	blender.exe!WM_operator_name_call_ptr(bContext * C, wmOperatorType * ot, wmOperatorCallContext context, PointerRNA * properties, const wmEvent * event) Line 1801	C++
 	blender.exe!WM_operator_name_call_ptr_with_depends_on_cursor(bContext * C, wmOperatorType * ot, wmOperatorCallContext opcontext, PointerRNA * properties, const wmEvent * event, const char * drawstr) Line 1990	C++
 	blender.exe!ui_apply_but_funcs_after(bContext * C) Line 1030	C++
 	blender.exe!ui_handler_region_menu(bContext * C, const wmEvent * event, void * __formal) Line 11666	C++
 	blender.exe!wm_handler_ui_call(bContext * C, wmEventHandler_UI * handler, const wmEvent * event, const bool always_pass) Line 834	C++
 	blender.exe!wm_handlers_do_intern(bContext * C, wmWindow * win, wmEvent * event, ListBase * handlers) Line 3326	C++
 	blender.exe!wm_handlers_do(bContext * C, wmEvent * event, ListBase * handlers) Line 3445	C++
 	blender.exe!wm_event_do_handlers(bContext * C) Line 4072	C++
 	blender.exe!WM_main(bContext * C) Line 638	C++
 	blender.exe!main(int argc, const char * * __formal) Line 579	C++
 	[External Code]

I can confirm the issue. Here is the call stack at the time of the crash: ``` Exception thrown: read access violation. oglrender->region was nullptr. ``` ``` > blender.exe!screen_opengl_render_init(bContext * C, wmOperator * op) Line 797 C++ blender.exe!screen_opengl_render_invoke(bContext * C, wmOperator * op, const wmEvent * event) Line 1260 C++ blender.exe!wm_operator_invoke(bContext * C, wmOperatorType * ot, const wmEvent * event, PointerRNA * properties, ReportList * reports, const bool poll_only, bool use_last_properties) Line 1551 C++ blender.exe!wm_operator_call_internal(bContext * C, wmOperatorType * ot, PointerRNA * properties, ReportList * reports, const wmOperatorCallContext context, const bool poll_only, const wmEvent * event) Line 1752 C++ blender.exe!WM_operator_name_call_ptr(bContext * C, wmOperatorType * ot, wmOperatorCallContext context, PointerRNA * properties, const wmEvent * event) Line 1801 C++ blender.exe!WM_operator_name_call_ptr_with_depends_on_cursor(bContext * C, wmOperatorType * ot, wmOperatorCallContext opcontext, PointerRNA * properties, const wmEvent * event, const char * drawstr) Line 1990 C++ blender.exe!ui_apply_but_funcs_after(bContext * C) Line 1030 C++ blender.exe!ui_handler_region_menu(bContext * C, const wmEvent * event, void * __formal) Line 11666 C++ blender.exe!wm_handler_ui_call(bContext * C, wmEventHandler_UI * handler, const wmEvent * event, const bool always_pass) Line 834 C++ blender.exe!wm_handlers_do_intern(bContext * C, wmWindow * win, wmEvent * event, ListBase * handlers) Line 3326 C++ blender.exe!wm_handlers_do(bContext * C, wmEvent * event, ListBase * handlers) Line 3445 C++ blender.exe!wm_event_do_handlers(bContext * C) Line 4072 C++ blender.exe!WM_main(bContext * C) Line 638 C++ blender.exe!main(int argc, const char * * __formal) Line 579 C++ [External Code] ```

Germano Cavalcante added

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Blender crashes at OpenGL render if viewport.lock_rotation is True #119058