frxPreview on MacOs using Metal support on FMX

Hi ,

I am using Delphi 10.41 and I made some tests turning Metal support on for my applications on MacOS.

After turning Metal on by setting GlobalUseMetal := True, frxPreview does not work properly any more.

Calling the report the first time, every thing seem to be ok. After changing the Zoom a couple of times, the preview does not work any more (different sizes of the previewed pages are shown at the same time).

The problem occurs for example if you increase the zoom 4 times by using:

frxPreview1.Zoom := frxPreview1.Zoom + 0.25;

and afterwards decrease it again 4 times by using:

frxPreview1.Zoom := frxPreview1.Zoom - 0.25;

Without Metal support (without setting GlobalUseMetal := True) everything works fine,…

Any ideas I can solve this problem ?

Thanks

Thomas

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