Drop_shadow artefacts

kisvegabor · March 31, 2026, 9:59am

Hi @clydeps,

Thank you for reporting it. I’ve just sent a PR to fix it. Could you check it?

github.com/lvgl/lvgl

fix(blur): fix incorrect invalidation if part has blur or dropshadow

lvgl:master ← kisvegabor:fix/blur-inv

opened 09:58AM - 31 Mar 26 UTC

kisvegabor

+76 -34

fixes https://forum.lvgl.io/t/drop-shadow-artefacts/23784 ### Notes - Up…date the [Documentation](https://github.com/lvgl/lvgl/tree/master/docs) if needed. - Add [Examples](https://github.com/lvgl/lvgl/tree/master/examples) if relevant. - Add [Tests](https://github.com/lvgl/lvgl/blob/master/tests/README.md) if applicable. - If you added new options to `lv_conf_template.h` run [lv_conf_internal_gen.py](https://github.com/lvgl/lvgl/blob/master/scripts/lv_conf_internal_gen.py) and update [Kconfig](https://github.com/lvgl/lvgl/blob/master/Kconfig). - Run `scripts/code-format.py` (`astyle v3.4.12` needs to installed by running `cd scripts; ./install_astyle.sh`) and follow the [Code Conventions](https://docs.lvgl.io/master/CODING_STYLE.html). - Mark the Pull request as [Draft](https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/proposing-changes-to-your-work-with-pull-requests/changing-the-stage-of-a-pull-request) while you are working on the first version, and mark is as _Ready_ when it's ready for review. - When changes were requested, [re-request review](https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/proposing-changes-to-your-work-with-pull-requests/requesting-a-pull-request-review) to notify the maintainers. - Help us to review this Pull Request! Anyone can [approve or request changes](https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/approving-a-pull-request-with-required-reviews).