Memory leak in image_paint operator #75172

New Issue

Joshua Knauber · 2020-03-28T22:40:40+01:00

Joshua Knauber commented

2020-03-28 22:40:40 +01:00

System Information
Operating system: Windows-10-10.0.18362-SP0 64 Bits
Graphics card: Intel(R) HD Graphics 620 Intel 4.5.0 - Build 25.20.100.6472

Blender Version
Broken: version: 2.83 (sub 11), branch: master, commit date: 2020-03-28 14:08, hash: a882debee0

Short description of error
There seems to be some sort of a memory leak when using the image_paint operator.

Exact steps for others to reproduce the error

Open a new blend file and run this script:
painting_modal.py
Go to texture painting mode and add an image texture to the texture painting slot.
Run the Paint Modal operator from the operator search
Paint on the object with Shift + Leftclick
The memory usage in the bottom right corner goes up very quickly the more you paint.
I asked about this issue on the blender stackexchange but didn't get any feedback that this is an issue with my code. Therefore I'm assuming that this is a bug.

**System Information** Operating system: Windows-10-10.0.18362-SP0 64 Bits Graphics card: Intel(R) HD Graphics 620 Intel 4.5.0 - Build 25.20.100.6472 **Blender Version** Broken: version: 2.83 (sub 11), branch: master, commit date: 2020-03-28 14:08, hash: `a882debee0` **Short description of error** There seems to be some sort of a memory leak when using the image_paint operator. **Exact steps for others to reproduce the error** - Open a new blend file and run this script: [painting_modal.py](https://archive.blender.org/developer/F8433562/painting_modal.py) - Go to texture painting mode and add an image texture to the texture painting slot. - Run the Paint Modal operator from the operator search - Paint on the object with Shift + Leftclick The memory usage in the bottom right corner goes up very quickly the more you paint. I asked about this issue on the blender stackexchange but didn't get any feedback that this is an issue with my code. Therefore I'm assuming that this is a bug.

Joshua Knauber commented

2020-03-28 22:40:40 +01:00

Added subscriber: @JoshuaKnauber

Campbell Barton commented

2020-03-29 08:07:44 +02:00

Added subscriber: @ideasman42

Campbell Barton commented

2020-03-29 08:07:44 +02:00

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

Campbell Barton closed this issue

2020-03-29 08:07:44 +02:00

Campbell Barton self-assigned this 2020-03-29 08:07:44 +02:00

Campbell Barton commented

2020-03-29 08:07:44 +02:00

Every separate call to bpy.ops.paint.image_paint adds a new undo step.
The cause of higher memory is every mouse movement is a separate undo step.

Even though this could be supported, it's not an error in the code.

Closing.

Every separate call to `bpy.ops.paint.image_paint` adds a new undo step. The cause of higher memory is every mouse movement is a separate undo step. Even though this could be supported, it's not an error in the code. Closing.

Joshua Knauber commented

2020-03-29 11:26:35 +02:00

This comment was removed by @JoshuaKnauber

*This comment was removed by @JoshuaKnauber*

Joshua Knauber commented

2020-03-29 13:11:19 +02:00

In #75172#899672, @ideasman42 wrote:
Every separate call to bpy.ops.paint.image_paint adds a new undo step.
The cause of higher memory is every mouse movement is a separate undo step.

I assumed something like this was the problem but then I'm not sure I understand why calling the operator with the undo parameter set to False like this:
bpy.ops.paint.image_paint(context.copy(),"EXEC_DEFAULT",False)
has the same effect

> In #75172#899672, @ideasman42 wrote: > Every separate call to `bpy.ops.paint.image_paint` adds a new undo step. > The cause of higher memory is every mouse movement is a separate undo step. I assumed something like this was the problem but then I'm not sure I understand why calling the operator with the undo parameter set to False like this: ```bpy.ops.paint.image_paint(context.copy(),"EXEC_DEFAULT",False)``` has the same effect

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Memory leak in image_paint operator #75172