What MCU/Processor/Board and compiler are you using?
What LVGL version are you using?
What do you want to achieve?
Efficiently flip images runtime. Rationale: Some images on the GUI can be re-used in flipped/mirrored version, therefore saving precious resources.
What have you tried so far?
Rotation, but only useful for symmetric images.
Re-creating a flipped copy of the original image in RAM, inefficient