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potential bug in color panel 16 bit


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I might be wrong or expecting to much.

When using a document with 16 or 32 bit color depth, and 16-bit colors in color panel,

i would expect beeing able to enter 16-bit values to RGBHEX. But it will only accept 00-FF (8 bit) and always replace the "high" byte with 00.

The "resulting" color code from all 3 channels will simply double/repeat the given 8-bit hex value. This is at least confusing, or a bug.

image.png.92f2ea27494cbe4617ec1f3362e8c404.png

image.png.e4cd76a33b1d3154ee4fac2c7496f072.png

 

HSL or LAB do not offer any option to enter 16-bit values.

image.png.8965f6bf110cf756a566bbf372df0cdf.png

image.png.b37f899c4ef581173e0c997aa0684208.png

And last but not least, the info panel is completely unable to show 16-bit colors. All you get is either 8-bit or less than 7-bit if using % (0-100%).

Only option to enter 16-bit is using RGB or greyscale.

Only option to display 16-bit color value is to use color picker, and read out result in color panel.

 

Mac mini M1 A2348 | Windows 10 - AMD Ryzen 9 5900x - 32 GB RAM - Nvidia GTX 1080

LG34WK950U-W, calibrated to DCI-P3 with LG Calibration Studio / Spider 5

iPad Air Gen 5 (2022) A2589

Special interest into procedural texture filter, edit alpha channel, RGB/16 and RGB/32 color formats, stacking, finding root causes for misbehaving files, finding creative solutions for unsolvable tasks, finding bugs in Apps.

 

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This video explains why the color panel is broken with respect to showing 16  bit colors in RGB hex mode (16 bit).

The hex code with 4 digits for every color channel should show values from 0000 to FFFF.

Instead, it shows 0000 to 00FF.

Consequently, the values are truncated to 8 bit / 256 values.

Only the combined field (below the 3 color channels, starting with #) will show the correct 16 bit hex value of all 3 channels

image.png.f741ae39810c8a16a45cab5a23368769.png

 

 

2021-02-20_18-14-48.mkv

Mac mini M1 A2348 | Windows 10 - AMD Ryzen 9 5900x - 32 GB RAM - Nvidia GTX 1080

LG34WK950U-W, calibrated to DCI-P3 with LG Calibration Studio / Spider 5

iPad Air Gen 5 (2022) A2589

Special interest into procedural texture filter, edit alpha channel, RGB/16 and RGB/32 color formats, stacking, finding root causes for misbehaving files, finding creative solutions for unsolvable tasks, finding bugs in Apps.

 

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Hi Old Bruce,

your comment does not help, as16 bit is active, of course.

Otherwise you would see only 2 digit hex codes.

This bug may affect Windows OS only, explaining that you may not see it on your Mac devices.

 

8 bit:

image.png.b93b8975fb83260b687368f86e05ba7d.png

image.png.594d50de351412aec01d710c4525bb0b.png

 

16 bit:

image.png.b56894f3141033455619b9cc8d69678b.png

image.png.cfee5271a898206390fa1fd08070f6d6.png

 

Mac mini M1 A2348 | Windows 10 - AMD Ryzen 9 5900x - 32 GB RAM - Nvidia GTX 1080

LG34WK950U-W, calibrated to DCI-P3 with LG Calibration Studio / Spider 5

iPad Air Gen 5 (2022) A2589

Special interest into procedural texture filter, edit alpha channel, RGB/16 and RGB/32 color formats, stacking, finding root causes for misbehaving files, finding creative solutions for unsolvable tasks, finding bugs in Apps.

 

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  • 7 months later...

Bump.

This bug actually has been found before by @MxHeppain September 2020. 12 Month and counting 🕰

 

Mac mini M1 A2348 | Windows 10 - AMD Ryzen 9 5900x - 32 GB RAM - Nvidia GTX 1080

LG34WK950U-W, calibrated to DCI-P3 with LG Calibration Studio / Spider 5

iPad Air Gen 5 (2022) A2589

Special interest into procedural texture filter, edit alpha channel, RGB/16 and RGB/32 color formats, stacking, finding root causes for misbehaving files, finding creative solutions for unsolvable tasks, finding bugs in Apps.

 

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