Description:
Tested with different PDF files (some containing an image, some containing text after being exported from MS Word). When the "Redacted Export (White)" or "Redacted Export (Black)" is used to save a PDF file, the quality of the output file is very poor, as in:
- the resolution is quite low (looks something like below 100 DPI)
- colored artifacts show up around added shapes
I see no option to change the resolution in the program's settings.

Steps to Reproduce:
1. Get a PDF document of any kind (eg. write something in LO Writer and export it to PDF)
2. Open it on LibreOffice Draw
3. Add some rectangles and circles to the page
4. Use either "Redacted Export (White)" or "Redacted Export (Black)" to save a redacted PDF file.
5. Open the file in a PDF reader of your choice and inspect the quality

Actual Results:
The saved file is in low resolution and colored artifacts around added shapes are visible

Expected Results:
The saved file has high enough resolution to produce a good quality print (IMO: 150 DPI at the very least) and added shapes have no distortions.


Reproducible: Always


User Profile Reset: Yes


OpenGL enabled: Yes

Additional Info:
Version: 6.3.2.2 (x64)
Build ID: 98b30e735bda24bc04ab42594c85f7fd8be07b9c
CPU threads: 8; OS: Windows 6.1; UI render: GL; VCL: win; 
Locale: pl-PL (pl_PL); UI-Language: en-US
Calc: CL

I noticed that similar issues show up if, instead of using "Redacted Export" immediately, you select all elements in the document, then right click one of them, and pick "Convert" > "To Bitmap".