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rasops.h revision 1.1 
      1 /* $NetBSD: rasops.h,v 1.1 1999/04/13 00:17:59 ad Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 1999 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Andy Doran <ad (at) NetBSD.org>.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *        This product includes software developed by the NetBSD
     21  *        Foundation, Inc. and its contributors.
     22  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23  *    contributors may be used to endorse or promote products derived
     24  *    from this software without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36  * POSSIBILITY OF SUCH DAMAGE.
     37  */
     38 #ifndef _RASOPS_H_
     39 #define _RASOPS_H_ 1
     40 
     41 /* Avoid dragging in dev/wscons/wsconsio.h */
     42 struct wsdisplay_font;
     43 
     44 struct rasops_info {
     45 	/* These must be filled in by the caller */
     46 	int	ri_depth;	/* depth in bits */
     47 	u_char	*ri_bits;	/* ptr to bits */
     48 	int	ri_width;	/* width (pels) */
     49 	int	ri_height;	/* height (pels) */
     50 	int	ri_stride;	/* stride in bytes */
     51 
     52 	/* These can optionally be left NULL */
     53 	struct	wsdisplay_font *ri_font;/* font to use */
     54 	void	*ri_priv;		/* driver private data */
     55 	u_char	ri_forcemono;		/* force monochrome operation */
     56 	u_char	__pad0;
     57 
     58 	/*
     59 	 * These are optional and will default if zero. Meaningless
     60 	 * on depths other than 15, 16, 24 and 32 bits per pel. On
     61 	 * 24 bit displays, ri_{r,g,b}num must be 8.
     62 	 */
     63 	u_char	ri_rnum;	/* number of bits for red */
     64 	u_char	ri_gnum;	/* number of bits for green */
     65 	u_char	ri_bnum;	/* number of bits for blue */
     66 	u_char	ri_rpos;	/* which bit red starts at */
     67 	u_char	ri_gpos;	/* which bit green starts at */
     68 	u_char	ri_bpos;	/* which bit blue starts at */
     69 
     70 	/* These are filled in by rasops_init() */
     71 	int	ri_emuwidth;	/* width we actually care about */
     72 	int	ri_emuheight;	/* height we actually care about */
     73 	int	ri_emustride;	/* bytes per row we actually care about */
     74 	int	ri_rows;	/* number of rows (characters, not pels) */
     75 	int	ri_cols;	/* number of columns (characters, not pels) */
     76 	int	ri_delta;	/* row delta in bytes */
     77 	int	ri_flg;		/* flags */
     78 	int	ri_crow;	/* cursor row */
     79 	int	ri_ccol;	/* cursor column */
     80 	int	ri_pelbytes;	/* bytes per pel */
     81 	int	ri_fontscale;	/* fontheight * fontstride */
     82 	int	ri_xscale;	/* fontwidth * pelbytes */
     83 	int	ri_yscale;	/* fontheight * stride */
     84 	u_char  *ri_origbits;	/* where screen bits actually start */
     85 
     86 	/* For 15, 16, 24, 32 bits */
     87 	int32_t	ri_devcmap[16]; /* device colormap (WSCOL_*) */
     88 
     89 	/* The emulops you need to use */
     90 	struct	wsdisplay_emulops ri_ops;
     91 
     92 	/* Callbacks so we can share some code */
     93 	void	(*ri_do_cursor)(struct rasops_info *);
     94 };
     95 
     96 #define RASOPS_CURSOR		(0x01)	/* cursor is on */
     97 #define RASOPS_INITTED		(0x02)	/* struct is initialized */
     98 #define RASOPS_CURSOR_CLIPPED	(0x04)	/* cursor is clipped */
     99 
    100 #define DELTA(p, d, cast) ((p) = (cast)((caddr_t)(p) + (d)))
    101 
    102 /*
    103  * rasops_init().
    104  *
    105  * Integer parameters are: number of rows we'd like, number of columns we'd
    106  * like, whether we should clear the display and whether we should center
    107  * the output. Remember that what you'd like is always not what you get.
    108  *
    109  * In terms of optimization, fonts that are a multiple of 8 pixels wide
    110  * work the best: this is important, and will cost you if you don't use 'em.
    111  */
    112 
    113 /* rasops.c */
    114 int	rasops_init __P((struct rasops_info *, int, int, int, int));
    115 void	rasops_unpack_attr __P((long, int *, int *, int *));
    116 
    117 /* This should not be called outside rasops */
    118 void	rasops_init_devcmap __P((struct rasops_info *));
    119 
    120 extern u_char rasops_isgray[16];
    121 extern u_char rasops_cmap[256*3];
    122 
    123 #endif /* _RASOPS_H_ */
    124