hex color entry wants to fight the user #58014

New Issue

Jakub Steiner · 2018-11-23T12:28:37+01:00

Jakub Steiner commented

2018-11-23 12:28:37 +01:00

System Information
Operating system and graphics card
Fedora Linux 29

Blender Version
Broken: 2.80alpha 2 2018-11-22

Short description of error

When entering color as a hex entry, Blender reinterprets it and shows a different value, because the computer knows color management way better than the banana loving ape in front of the screen.

Exact steps for others to reproduce the error
Go into, say, world color, switch to hex color view, enter ffffff, but blender insists on showing ddcfd8 (with a note that it's gamma corrected). I would expect all the color management to happen on top of the input value rather than adjusting the input value.

Here's a show screencast of the situation: http://jimmac.musichall.cz/stuff/unexpected-hex-entry.webm

**System Information** Operating system and graphics card Fedora Linux 29 **Blender Version** Broken: 2.80alpha 2 2018-11-22 **Short description of error** When entering color as a hex entry, Blender reinterprets it and shows a different value, because the computer knows color management way better than the banana loving ape in front of the screen. **Exact steps for others to reproduce the error** Go into, say, world color, switch to hex color view, enter ffffff, but blender insists on showing ddcfd8 (with a note that it's gamma corrected). I would expect all the color management to happen on top of the input value rather than adjusting the input value. Here's a show screencast of the situation: http://jimmac.musichall.cz/stuff/unexpected-hex-entry.webm

Jakub Steiner commented

2018-11-23 12:28:37 +01:00

Added subscriber: @JakubSteiner

Jakub Steiner commented

2018-11-23 12:32:04 +01:00

Do note this was an old .blend and the display device was mysteriously set to DCI-P3 rather than sRGB, which does not seem to suffer from this.

Do note this was an old .blend and the display device was mysteriously set to DCI-[P3](https://archive.blender.org/developer/P3.txt) rather than sRGB, which does not seem to suffer from this.

Brecht Van Lommel commented

2018-11-24 22:54:19 +01:00

Added subscriber: @brecht

Brecht Van Lommel commented

2018-11-24 22:54:19 +01:00

Probably hex should always convert to/from sRGB color space without a view transform and regardless of the display space.

Sebastian Parborg commented

2018-12-05 10:53:42 +01:00

Added subscriber: @ZedDB

Sebastian Parborg commented

2018-12-05 10:53:42 +01:00

@brecht something else seems to be wrong with the color transform too. Blender crashes for me if I switch to DCI-P3 and try to change the world color wheel, hsv, or hex values.
This is the error it prints:

 OpenColorIO Error: 3D Luts can only be applied in the forward direction. (inverse) specified.

This seems to get triggered by the ui_block_cm_to_scene_linear_v3 calls in source/blender/editors/interface/interface_region_color_picker.c

@brecht something else seems to be wrong with the color transform too. Blender crashes for me if I switch to DCI-[P3](https://archive.blender.org/developer/P3.txt) and try to change the world color wheel, hsv, or hex values. This is the error it prints: ``` OpenColorIO Error: 3D Luts can only be applied in the forward direction. (inverse) specified. ``` This seems to get triggered by the ui_block_cm_to_scene_linear_v3 calls in source/blender/editors/interface/interface_region_color_picker.c

Brecht Van Lommel self-assigned this 2018-12-05 11:20:44 +01:00

Brecht Van Lommel commented

2018-12-05 11:20:44 +01:00

Yes, the problem is that it goes through a view transform which is not invertible in general, and just not appropriate for this case.

Anyway, fixing this requires some familiarity with the color management system, so assigning to self.

Yes, the problem is that it goes through a view transform which is not invertible in general, and just not appropriate for this case. Anyway, fixing this requires some familiarity with the color management system, so assigning to self.

blender-admin commented

2018-12-13 18:28:41 +01:00

This issue was referenced by a7b3d58066

This issue was referenced by a7b3d58066a18c63037051477e45528380c5decf

Brecht Van Lommel commented

2018-12-13 19:32:39 +01:00

Changed status from 'Open' to: 'Resolved'

Brecht Van Lommel closed this issue

2018-12-13 19:32:39 +01:00

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hex color entry wants to fight the user #58014