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NetBSD 6.1.5 - man page for rasops (netbsd section 9)

RASOPS(9)			  BSD Kernel Developer's Manual 			RASOPS(9)

     rasops, rasops_init, rasops_reconfig -- raster display operations

     #include <dev/wscons/wsdisplayvar.h>
     #include <dev/rasops/rasops.h>

     rasops_init(struct rasops_info *ri, int wantrows, int wantcols);

     rasops_reconfig(struct rasops_info *ri, int wantrows, int wantcols);

     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

     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
	   RI_NO_AUTO	       do not generate box drawing characters for ISO fonts.  Use this
			       when it is not safe to allocate memory, for example when setting
			       up an early console.
	   RI_ENABLE_ALPHA     set this if the caller supports anti-aliased fonts in the given
			       colour depth.  Without this flag rasops_init() will only pick bit-
			       map fonts.
	   RI_8BIT_IS_RGB      set this if the caller uses an R3G3B2 colour map in 8 bit.
			       rasops_init() will generate an appropriate ri_devcmap[] but the
			       caller still needs to set up the actual colour map.

     rasops_init(ri, wantrows, wantcols)
	      Initialise a rasops_info descriptor.  The arguments wantrows and wantcols are the
	      number of rows and columns we'd like.  In terms of optimization, fonts that are a
	      multiple of 8 pixels wide work the best.

     rasops_reconfig(ri, wantrows, wantcols)
	      Reconfigure a rasops_info descriptor because parameters have changed in some way.
	      The arguments wantrows and wantcols are the number of rows and columns we'd like.
	      Passing zero for either one of them uses the default - normally 80x25 but it can be
	      changed with

		    options RASOPS_DEFAULT_WIDTH=80
		    options RASOPS_DEFAULT_HEIGHT=25
	      If calling 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).

     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.

     intro(9), wscons(9), wsdisplay(9), wsfont(9)

     The rasops subsystem appeared in NetBSD 1.5.

     The rasops subsystem was written by Andrew Doran <ad@NetBSD.org>.

BSD					 January 13, 2012				      BSD

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