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Image editor very slow with hires textures
Open, Needs Triage by DeveloperPublic

Description

System Information
Operating system: Mac OS 10.13.6
Graphics card: NVIDIA GeForce GTX 1070 OpenGL Engine NVIDIA Corporation 4.1 NVIDIA-10.33.0 387.10.10.10.40.127

Blender Version
Broken: version: 2.80 (sub 75), branch: master, commit date: 2019-07-29 14:47, hash: rBf6cb5f54494e
Worked: (optional)

Short description of error
Editing texture in image editor is very slow wit hi res textures

Exact steps for others to reproduce the error
Hi guys. Im struggeling with one problem. If i render image or want to paint texture, operating with image in image editor is very slow. This happens if texture(image) is 4000x4000 and bigger. 8000x8000 its imposible to zoom in and out. Very laggy and slow. But. I tryied to install windows 8.1 on my Mac. And everything is fast even 8000x8000 texture. So it is not problem of hardware but software. Is it possible to fix it or should i switch to Windows. Thanks for your work. Jan

[Based on the default startup or an attached .blend file (as simple as possible)]
Try to make new 8000x8000 texture and move it around or zoom in/out in image editor

Details

Type
Bug

Event Timeline

I cannot reproduce this on OSX 10.12.6. The textrure painting and floodfill feel slow, but zooming in and out works well enough. Could be related to the nvidia driver.

System Information
Operating system: Darwin-16.7.0-x86_64-i386-64bit 64 Bits
Graphics card: AMD Radeon R9 M370X OpenGL Engine ATI Technologies Inc. 4.1 ATI-1.51.8

Blender Version
Broken: version: 2.81 (sub 8), branch: master (modified), commit date: 2019-09-06 19:05, hash: rB9ecbd67dfb67