GPU implementation on LVGL

Hello, I am thinking of using my MCU of choice’s built in graphical processor for some LVGL drawing functions.

However, I find the documentation for “Custom GPU” quite confusing: Add custom GPU — LVGL documentation

Here are the rendering functions my graphical processor has:

What if I only want to use the GPU for drawing a rectangle shape, and letting LVGL make this rectangle round, is that possible?