RASOPS(9) | Kernel Developer's Manual | RASOPS(9) |
rasops
,
rasops_init
, rasops_reconfig
— raster display operations
#include
<dev/wscons/wsdisplayvar.h>
#include
<dev/rasops/rasops.h>
int
rasops_init
(struct
rasops_info *ri, int
wantrows, int
wantcols);
int
rasops_reconfig
(struct
rasops_info *ri, int
wantrows, int
wantcols);
The rasops
subsystem is a set of raster
operations for wscons(4).
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 */ /* * 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 */ struct wsdisplay_charcell *ri_bs; /* character backing store */ 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 *); void (*ri_updatecursor)(struct rasops_info *); #if NRASOPS_ROTATION > 0 /* Used to intercept putchar to permit display rotation */ struct wsdisplay_emulops ri_real_ops; #endif };
The value of the ri_flg member is formed by OR'ing the following values:
rasops_reconfig
()
completed successfullyRI_VCONS
is set or the
ri_bs member is
set.rasops_init
(ri,
wantrows, wantcols)rasops_reconfig
(ri,
wantrows, wantcols)rasops_reconfig
() to change the
font and ri_wsfcookie ≥ 0, you must call
wsfont_unlock
()
on it, and reset it to -1 (or a new, valid cookie).This section describes places within the OpenBSD source tree where actual code implementing or utilising the rasops subsystem can be found. All pathnames are relative to /usr/src.
The rasops subsystem is implemented within the directory
sys/dev/rasops. The rasops
module itself is implemented within the file
sys/dev/rasops/rasops.c.
The rasops
subsystem appeared in
NetBSD 1.5 and OpenBSD first
support appeared in OpenBSD 2.9.
The rasops
subsystem was written by
Andrew Doran
<ad@NetBSD.org>.
Display rotation was written by Christopher Pascoe
<pascoe@openbsd.org>.
Display rotation only works for 16bpp displays.
August 21, 2017 | OpenBSD-current |