The
rasops subsystem is a set of raster operations for
wscons(9).
The primary data type for using the raster operations is the
rasops_info structure in
dev/rasops/rasops.h:
struct rasops_info {
/*
* These must be filled in by the caller
*/
int ri_depth; /* depth in bits */
u_char *ri_bits; /* ptr to bits */
int ri_width; /* width (pels) */
int ri_height; /* height (pels) */
int ri_stride; /* stride in bytes */
/*
* If you want shadow framebuffer support, point ri_hwbits
* to the real framebuffer, and ri_bits to the shadow framebuffer
*/
u_char *ri_hwbits;
/*
* These can optionally be left zeroed out. If you fill ri_font,
* but aren't using wsfont, set ri_wsfcookie to -1.
*/
struct wsdisplay_font *ri_font;
int ri_wsfcookie; /* wsfont cookie */
void *ri_hw; /* driver private data */
int ri_crow; /* cursor row */
int ri_ccol; /* cursor column */
int ri_flg; /* various operational flags */
/*
* These are optional and will default if zero. Meaningless
* on depths other than 15, 16, 24 and 32 bits per pel. On
* 24 bit displays, ri_{r,g,b}num must be 8.
*/
u_char ri_rnum; /* number of bits for red */
u_char ri_gnum; /* number of bits for green */
u_char ri_bnum; /* number of bits for blue */
u_char ri_rpos; /* which bit red starts at */
u_char ri_gpos; /* which bit green starts at */
u_char ri_bpos; /* which bit blue starts at */
/*
* These are filled in by rasops_init()
*/
int ri_emuwidth; /* width we actually care about */
int ri_emuheight; /* height we actually care about */
int ri_emustride; /* bytes per row we actually care about */
int ri_rows; /* number of rows (characters) */
int ri_cols; /* number of columns (characters) */
int ri_delta; /* row delta in bytes */
int ri_pelbytes; /* bytes per pel (may be zero) */
int ri_fontscale; /* fontheight * fontstride */
int ri_xscale; /* fontwidth * pelbytes */
int ri_yscale; /* fontheight * stride */
u_char *ri_origbits; /* where screen bits actually start */
int ri_xorigin; /* where ri_bits begins (x) */
int ri_yorigin; /* where ri_bits begins (y) */
int32_t ri_devcmap[16]; /* color -> framebuffer data */
/*
* The emulops you need to use, and the screen caps for wscons
*/
struct wsdisplay_emulops ri_ops;
int ri_caps;
/*
* Callbacks so we can share some code
*/
void (*ri_do_cursor)(struct rasops_info *);
};
Valid values for the
ri_flg member are:
RI_FULLCLEAR
eraserows() hack to clear full screen
RI_FORCEMONO
monochrome output even if we can do color
RI_BSWAP
framebuffer endianness doesn't match CPU
RI_CURSOR
cursor is switched on
RI_CLEAR
clear display on startup
RI_CENTER
center onscreen output
RI_CURSORCLIP
cursor is currently clipped
RI_CFGDONE
rasops_reconfig() completed successfully