Font rendering artifacts on TouchGFX 4.23

[ypiotrp]

Hi, 

I decided to update TouchGFX in my project from 4.20 to the newest 4.23. I noticed some artifacts in font rendering from time to time. Below I attached a photo of the issue. 

Do you have any ideas why this is happening?

Regards,
Piotr

[Mohammad MORADI ESFAHANIASL]

Hello @ypiotrp ,

Could you please specify what text settings and typographies you are using? like are you using Binary fonts or Mapped or Unmapped? 

And what board are you using?

Thank you 

[ypiotrp]

Hello @Mohammad MORADI ESFAHANIASL ,

I'm back to the topic. I upgraded to TouchGFX 4.23.0 mainly for SVG images. I checked if the issue persist on older versions of TouchGFX which still have SVG images. I stopped at 4.21.4 and unfortunately artifacts in the font rendering are still in place. 

I cannot share with you my whole project (confidential) but I created some sample screen using ST stock images. Below you can find a video and also my configuration you asked about:

The board is custom. We use parallel RGB LTDC RGB666 to drive the LCD. We also use DMA2D. The configuration of the peripherals:

DMA2D:

LTDC: 

TouchGFX:

 

"text settings and typographies":

I attached the video describing my problem and also source code of the screen.

Thank you for your help,
Piotr