struct wsdisplay_fbinfo { 
	u_int	height; 
	u_int	width; 
	u_int	depth; 
	u_int	cmsize; 
};

The height and width members are counted in pixels. The depth member indicates the number of bits per pixel, and cmsize indicates the number of color map entries accessible through WSDISPLAYIO_GETCMAP and WSDISPLAYIO_PUTCMAP. This call is likely to be unavailable on text-only displays.

struct wsdisplay_cmap { 
	u_int	index; 
	u_int	count; 
	u_char	*red; 
	u_char	*green; 
	u_char	*blue; 
};

The index and count members specify the range of color map entries to retrieve. The red, green, and blue members should each point to an array of count u_chars. On return, these will be filled in with the appropriate entries from the color map. On all displays that support this call, values range from 0 for minimum intensity to 255 for maximum intensity, even if the display does not use eight bits internally to represent intensity.

WSDISPLAYIO_VIDEO_OFF

The display is blanked.

WSDISPLAYIO_VIDEO_ON

The display is enabled.

struct wsdisplay_curpos { 
        u_int x, y; 
};

The x and y members count the number of pixels right and down, respectively, from the top-left corner of the display to the hot spot of the cursor. This call is not available on displays without a hardware cursor.

struct wsdisplay_cursor { 
	u_int	which; 
	u_int	enable; 
	struct wsdisplay_curpos pos; 
	struct wsdisplay_curpos hot; 
	struct wsdisplay_cmap cmap; 
	struct wsdisplay_curpos size; 
	u_char *image; 
	u_char *mask; 
}; 

WSDISPLAYIO_CURSOR_DOCUR

Get enable, which indicates whether the cursor is currently displayed (non-zero) or not (zero).

WSDISPLAYIO_CURSOR_DOPOS

Get pos, which indicates the current position of the cursor on the display, as would be returned by WSDISPLAYIO_GCURPOS.

WSDISPLAYIO_CURSOR_DOHOT

Get hot, which indicates the location of the “hot spot” within the cursor. This is the point on the cursor whose position on the display is treated as being the position of the cursor by other calls. Its location is counted in pixels from the top-right corner of the cursor.

WSDISPLAYIO_CURSOR_DOCMAP

Get cmap, which indicates the current cursor color map. Unlike in a call to WSDISPLAYIO_GETCMAP, cmap here need not have its index and count members initialized. They will be set to 0 and 2 respectively by the call. This means that cmap.red, cmap.green, and cmap.blue must each point to at least enough space to hold two u_chars.

WSDISPLAYIO_CURSOR_DOSHAPE

Get size, image, and mask. These are, respectively, the dimensions of the cursor in pixels, the bitmap of set pixels in the cursor and the bitmap of opaque pixels in the cursor. The format in which these bitmaps are returned, and hence the amount of space that must be provided by the application, are device-dependent.

WSDISPLAYIO_CURSOR_DOALL

Get all of the above.

The device may elect to return information that was not requested by the user, so those elements of struct wsdisplay_cursor which are pointers should be initialized to NULL if not otherwise used. This call is not available on displays without a hardware cursor.

WSDISPLAYIO_CURSOR_DOCUR

If enable is zero, hide the cursor. Otherwise, display it.

WSDISPLAYIO_CURSOR_DOPOS

Set the cursor's position on the display to pos, the same as WSDISPLAYIO_SCURPOS.

WSDISPLAYIO_CURSOR_DOHOT

Set the “hot spot” of the cursor, as defined above, to hot.

WSDISPLAYIO_CURSOR_DOCMAP

Set some or all of the cursor color map based on cmap. The index and count elements of cmap indicate which color map entries to set, and the entries themselves come from cmap.red, cmap.green, and cmap.blue.

WSDISPLAYIO_CURSOR_DOSHAPE

Set the cursor shape from size, image, and mask. See above for their meanings.

WSDISPLAYIO_CURSOR_DOALL

Do all of the above.

This call is not available on displays without a hardware cursor.

WSDISPLAYIO_MODE_EMUL

The display is in emulating (text) mode.

WSDISPLAYIO_MODE_MAPPED

The display is in mapped (graphics) mode.

WSDISPLAYIO_MODE_DUMBFB

The display is in mapped (frame buffer) mode.

struct wsdisplay_msgattrs { 
	int default_attrs, default_bg, default_fg; 
	int kernel_attrs, kernel_bg, kernel_fg; 
};

The default_attrs and kernel_attrs variables are a combination of WSATTR_* bits, and specify the attributes used to draw messages. The default_bg, default_fg, kernel_bg and kernel_fg variables specify the colors used to print messages, being ‘_bg’ for the background and ‘_fg’ for the foreground; their values are one of all the WSCOL_* macros available.

struct wsdisplay_char { 
	int row, col; 
	uint16_t letter; 
	uint8_t background, foreground; 
	char flags; 
};

The row and col parameters are used as input; the rest of the structure is filled by the ioctl and is returned to you. letter is the ASCII code of the letter found at the specified position, background and foreground are its colors and flags is a combination of ‘WSDISPLAY_CHAR_BRIGHT’ and/or ‘WSDISPLAY_CHAR_BLINK’.

struct wsdisplayio_edid_info { 
	uint32_t buffer_size; 
	uint32_t data_size; 
	void *edid_data; 
};

int ver = WSDISPLAY_EVENT_VERSION; 
if (ioctl(fd, WSDISPLAYIO_SETVERSION, &ver) == -1) 
    err(EXIT_FAILURE, "cannot set version");