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:

  1. Get an instance of struct fb_vtable_s from the hardware-specific frame buffer device driver, and

  2. 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.