LibreOffice has a function to set "Color modes" on pictures such as "Grayscale" or "Black/White", etc.
Using "Grayscale" on a picture and saving it as PPTX then open the PPTX in LibreOffice again seems not to work. I can't say if it's the export or the import which does not work.
Steps to Reproduce:
1. Create a presentation with a picture in Impress
2. Set the "Color mode" option of the picture to "Grayscale"
3. Save the presentation as PPTX
4. Open the presentation in LibreOffice
The picture is shown with all colors.
The picture should be displayed in "Grayscale" mode.
User Profile Reset: No
Created attachment 151547 [details]
Image mode works in ODP version of the file
Created attachment 151548 [details]
Image mode doesn't works in PPTX version of the file
Build ID: 9c7fac47aacb0877c7d212217089a680400c1377
CPU threads: 4; OS: Linux 4.15; UI render: default; VCL: gtk3;
Locale: ca-ES (ca_ES.UTF-8); UI-Language: en-US
Version 18.104.22.168.alpha0+ (Build ID: efca6f15609322f62a35619619a6d5fe5c9bd5a)
@Tamás, since you fixed bug 125346 and bug 125360 recently, I thought you might be interested in this issue...
Working on it.
Closing as duplicate of bug 127901
*** This bug has been marked as a duplicate of bug 127901 ***