<sys/fbio.h>. Each responds to an
FBIOGTYPEioctl(2) request which returns information in a fbtype structure.
Each device has an FBTYPE which is used by
higher-level software to determine how to perform graphics functions. Each
device is used by opening it, doing an
ioctl(2) to see which frame buffer type
is present, and thereby selecting the appropriate device-management
FBIOGINFO returns information specific to
the GS accelerator.
FBIOGVIDEO are general-purpose
ioctl(2) requests for controlling
possible video features of frame buffers. These
ioctl(2) requests either set or return
the value of a flags integer. At this point, only the
FBVIDEO_ON option is available, controlled by
returns the current video state.
ioctl(2) requests allow access to
special features of newer frame buffers. They use the
fbsattr and fbgattr
Some color frame buffers support the
ioctl(2) requests, which provide access
to the colormap. They use the fbcmap structure.
Also, some framebuffers with multiple colormaps will either encode
the colormap identifier in the high-order bits of the “index”
field in the fbcmap structure, or use the
FBIOVERTICAL is used to wait for the start
of the next vertical retrace period.
FBIOVRTOFFSET Returns the offset to a
read-only “vertical retrace page” for those
framebuffers that support it. This vertical retrace page may be mapped into
user space with mmap(2). The first word
of the vertical retrace page (type unsigned int) is a
counter that is incremented every time there is a vertical retrace. The user
process can use this counter in a variety of ways.
FBIOMONINFO returns a
mon_info structure which contains information about
the monitor attached to the framebuffer, if available.
FBIOGCURPOS are used to control the hardware cursor
for those framebuffers that have this feature.
FBIOGCURMAX returns the maximum sized cursor
supported by the framebuffer. Attempts to create a cursor larger than this
FBIOGDEVINFO are used to transfer variable-length,
device-specific information into and out of framebuffers.
FBIOGATTRioctl(2) requests are only supported by frame buffers which emulate older frame buffer types. If a frame buffer emulates another frame buffer,
FBIOGTYPEreturns the emulated type. To get the real type, use
FBIOGCURPOS ioctl was incorrectly
defined in previous operating systems, and older code running in binary
compatibility mode may get incorrect results.
|March 13, 2022||OmniOS|