UV Layout: 'export_layout' operator doesn't run because GPU functions are not available in background mode #98167

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benhoyle · 2022-05-16T16:34:36+02:00

benhoyle commented

2022-05-16 16:34:36 +02:00

System Information
Operating system: Windows11 64 bits, ubuntu

Blender Version
Broken: nytimes/blender:3.1-cpu-ubuntu18.04
Worked: Never

Addon Information
Name: UV Layout (1, 1, 1)
Author: Campbell Barton, Matt Ebb

Short description of error
Error with bpy.ops.uv.export_layout() when trying to write UVs to a file.

Error: Python: Traceback (most recent call last):
  File "D:\BlenderDev\x64-Release\bin\RelWithDebInfo\3.3\scripts\addons\io_mesh_uv_layout\__init__.py", line 139, in execute
    export(filepath, polygon_data, different_colors, self.size[0], self.size[1], self.opacity)
  File "D:\BlenderDev\x64-Release\bin\RelWithDebInfo\3.3\scripts\addons\io_mesh_uv_layout\export_uv_png.py", line 13, in export
    offscreen = gpu.types.GPUOffScreen(width, height)
SystemError: GPU functions for drawing are not available in background mode

Exact steps for others to reproduce the error

In a console just run: blender.exe --background --python-expr "import bpy; bpy.ops.uv.export_layout()"

**System Information** Operating system: Windows11 64 bits, ubuntu **Blender Version** Broken: nytimes/blender:3.1-cpu-ubuntu18.04 Worked: Never **Addon Information** Name: UV Layout (1, 1, 1) Author: Campbell Barton, Matt Ebb **Short description of error** Error with `bpy.ops.uv.export_layout()` when trying to write UVs to a file. ``` Error: Python: Traceback (most recent call last): File "D:\BlenderDev\x64-Release\bin\RelWithDebInfo\3.3\scripts\addons\io_mesh_uv_layout\__init__.py", line 139, in execute export(filepath, polygon_data, different_colors, self.size[0], self.size[1], self.opacity) File "D:\BlenderDev\x64-Release\bin\RelWithDebInfo\3.3\scripts\addons\io_mesh_uv_layout\export_uv_png.py", line 13, in export offscreen = gpu.types.GPUOffScreen(width, height) SystemError: GPU functions for drawing are not available in background mode ``` **Exact steps for others to reproduce the error** - In a console just run: `blender.exe --background --python-expr "import bpy; bpy.ops.uv.export_layout()"`

benhoyle commented

2022-05-16 16:34:36 +02:00

Added subscriber: @benhoyle1212

Germano Cavalcante commented

2022-05-19 21:17:26 +02:00

Added subscriber: @mano-wii

Germano Cavalcante commented

2022-05-19 21:17:26 +02:00

Changed status from 'Needs Triage' to: 'Confirmed'

Germano Cavalcante commented

2022-05-19 21:17:26 +02:00

Well, even working offscreen, the GPU module does not work in background mode because in this mode a drawing context is not created.
So it's not something with a simple solution.
You need to create a temporary window if you really need to run this operator.

But Error: Python: Traceback doesn't seem ideal, therefore confirming the bug.

Well, even working offscreen, the GPU module does not work in background mode because in this mode a drawing context is not created. So it's not something with a simple solution. You need to create a temporary window if you really need to run this operator. But `Error: Python: Traceback` doesn't seem ideal, therefore confirming the bug.

Germano Cavalcante changed title from ~~GPU functions for drawing are not available in background mode : Docker-container Ubuntu 18.04 blender 3.10~~ to UV Layout: 'export_layout' operator doesn't run because GPU functions are not available in background mode

2022-05-19 21:19:37 +02:00

p commented

2022-06-01 13:47:13 +02:00

Added subscriber: @phil123456

p commented

2022-06-01 13:47:13 +02:00

FYI : I have the same issue installing MY addon while the problem comes form the official Anim Extras addon
(workaround : disabled animextras - install my script - enable animextras)

"P:\Program Files\Blender Foundation\Blender 3.1\blender.exe" --background --python __init__.py

Blender 3.1.2 (hash cc66d1020c3b built 2022-03-31 23:39:57)
Read prefs: C:\Users\phil\AppData\Roaming\Blender Foundation\Blender\3.1\config\userpref.blend
Traceback (most recent call last):
  File "P:\Program Files\Blender Foundation\Blender 3.1\3.1\scripts\modules\addon_utils.py", line 351, in enable
    mod = __import__(module_name)
  File "C:\Users\phil\AppData\Roaming\Blender Foundation\Blender\3.1\scripts\addons\animextras-main\__init__.py", line 40, in <module>
    from .ons.gui import *
  File "C:\Users\phil\AppData\Roaming\Blender Foundation\Blender\3.1\scripts\addons\animextras-main\ons\gui.py", line 6, in <module>
    from .ops import *
  File "C:\Users\phil\AppData\Roaming\Blender Foundation\Blender\3.1\scripts\addons\animextras-main\ons\ops.py", line 19, in <module>
    shader = gpu.shader.from_builtin('3D_UNIFORM_COLOR')
SystemError: GPU functions for drawing are not available in background mode
importing .py files

FYI : I have the same issue installing MY addon while the problem comes form the official Anim Extras addon (workaround : disabled animextras - install my script - enable animextras) ``` "P:\Program Files\Blender Foundation\Blender 3.1\blender.exe" --background --python __init__.py ``` ``` Blender 3.1.2 (hash cc66d1020c3b built 2022-03-31 23:39:57) Read prefs: C:\Users\phil\AppData\Roaming\Blender Foundation\Blender\3.1\config\userpref.blend Traceback (most recent call last): File "P:\Program Files\Blender Foundation\Blender 3.1\3.1\scripts\modules\addon_utils.py", line 351, in enable mod = __import__(module_name) File "C:\Users\phil\AppData\Roaming\Blender Foundation\Blender\3.1\scripts\addons\animextras-main\__init__.py", line 40, in <module> from .ons.gui import * File "C:\Users\phil\AppData\Roaming\Blender Foundation\Blender\3.1\scripts\addons\animextras-main\ons\gui.py", line 6, in <module> from .ops import * File "C:\Users\phil\AppData\Roaming\Blender Foundation\Blender\3.1\scripts\addons\animextras-main\ons\ops.py", line 19, in <module> shader = gpu.shader.from_builtin('3D_UNIFORM_COLOR') SystemError: GPU functions for drawing are not available in background mode importing .py files ```

Ciara-Byers commented

2024-03-20 11:27:38 +01:00

Is there an alternative to uv.export_layout that wouldn't require the gui? All the maths is being done under the hood anyway, is it not possible to access it without the gui?

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UV Layout: 'export_layout' operator doesn't run because GPU functions are not available in background mode #98167