nuttx/Documentation/components/drivers/special/framebuffer.rst

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====================
Frame Buffer Drivers
====================
- ``include/nuttx/video/fb.h``. All structures and APIs
needed to work with frame buffer drivers are provided in this
header file.
- ``struct fb_vtable_s``. Each frame buffer device driver
must implement an instance of ``struct fb_vtable_s``. That
structure defines a call table with the following methods:
Get information about the video controller configuration and
the configuration of each color plane.
The following are provided only if the video hardware supports
RGB color mapping:
The following are provided only if the video hardware supports
a hardware cursor:
- **Binding Frame Buffer Drivers**. Frame buffer drivers are not
normally directly accessed by user code, but are usually bound
to another, higher level device driver. In general, the binding
sequence is:
#. Get an instance of ``struct fb_vtable_s`` from the
hardware-specific frame buffer device driver, and
#. Provide that instance to the initialization method of the
higher level device driver.
- **Examples**: ``arch/sim/src/up_framebuffer.c``. See also the
usage of the frame buffer driver in the ``graphics/``
directory.