RGB Histogram in "display line" mode doesn't include Green channel. #38017

New Issue

Paulo José Oliveira Amaro · 2014-01-01T18:45:38+01:00

2014-01-01 18:45:38 +01:00

System Information
Ubuntu 13.10 32-bit
Intel Ironlake Mobile x86/MMX/SSE

Blender Version
Broken: 2.69.7 e1b322b

Short description of error
In UV/Image Editor, the RGB Histogram display doesn't include Green channel in its "line" mode.

Exact steps for others to reproduce the error

Open an image in the UV/Image editor
Display the Histogram, change to "RGB", then select "Display line rather than filled shapes"

**System Information** Ubuntu 13.10 32-bit Intel Ironlake Mobile x86/MMX/SSE **Blender Version** Broken: 2.69.7 e1b322b **Short description of error** In UV/Image Editor, the RGB Histogram display doesn't include Green channel in its "line" mode. ![Screenshot_from_2014-01-01_13:57:15.png](https://archive.blender.org/developer/F60150/Screenshot_from_2014-01-01_13_57_15.png) **Exact steps for others to reproduce the error** 1. Open an image in the UV/Image editor 2. Display the Histogram, change to "RGB", then select "Display line rather than filled shapes"

Paulo José Oliveira Amaro commented

2014-01-01 18:45:38 +01:00

Changed status to: 'Open'

Paulo José Oliveira Amaro commented

2014-01-01 18:45:38 +01:00

Added subscriber: @PauloJoseOliveiraAmaro

Brecht Van Lommel commented

2014-01-02 00:43:04 +01:00

Added subscriber: @brecht

Brecht Van Lommel commented

2014-01-02 00:43:04 +01:00

I can't reproduce the issue, it shows the green line here. Can you attach a .blend file (with packed image) that shows the problem?

If we still can't redo it then it's most likely some OpenGL issue related to the graphics card or drivers.

I can't reproduce the issue, it shows the green line here. Can you attach a .blend file (with packed image) that shows the problem? If we still can't redo it then it's most likely some OpenGL issue related to the graphics card or drivers.

Paulo José Oliveira Amaro commented

2014-01-02 00:57:14 +01:00

Yes, I hope it help you. histogram-line-bug.blend If there anything else I can inform, let me know.

Actually it doesn't need an image, I can reproduce it with world background color:

Yes, I hope it help you. [histogram-line-bug.blend](https://archive.blender.org/developer/F60258/histogram-line-bug.blend) If there anything else I can inform, let me know. Actually it doesn't need an image, I can reproduce it with world background color: ![histogram-line-bug.blend.png](https://archive.blender.org/developer/F60259/histogram-line-bug.blend.png)

Brecht Van Lommel commented

2014-01-02 02:56:40 +01:00

I see the green line here, so it's likely a bug in the graphics card or driver. There should exist a workaround but it's difficult to find without having this hardware.

Paulo José Oliveira Amaro commented

2014-01-02 05:29:57 +01:00

Thank you! That's a non obstructive bug, since I can still watch the Histogram in its "filled mode", but I hope it can be fixed.

I Tested older versions of blender (2.65, 2.64, 2.63), none of them have the Green channel in RGB Histogram. Few time ago I had troubles with Inkscape not drawing lines, and I discovered it was related to the Global Menu of Ubuntu. Disabling it worked to Inkscape. I tested right now with Blender, with no success. :-(

Thank you! That's a non obstructive bug, since I can still watch the Histogram in its "filled mode", but I hope it can be fixed. I Tested older versions of blender (2.65, 2.64, 2.63), none of them have the Green channel in RGB Histogram. Few time ago I had troubles with Inkscape not drawing lines, and I discovered it was related to the Global Menu of Ubuntu. Disabling it worked to Inkscape. I tested right now with Blender, with no success. :-(

Brecht Van Lommel commented

2014-01-21 17:37:48 +01:00

Changed status from 'Open' to: 'Archived'

Brecht Van Lommel closed this issue

2014-01-21 17:37:48 +01:00

Brecht Van Lommel self-assigned this 2014-01-21 17:37:48 +01:00

Brecht Van Lommel commented

2014-01-21 17:37:48 +01:00

I tried this with Mesa drivers on Linux but couldn't reproduce the bug. This is pretty clearly a graphics driver bug, and it's with a graphics card that is below our minimum requirements, so we can't officially support it, closing this report.

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RGB Histogram in "display line" mode doesn't include Green channel. #38017