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rasops.h revision 1.23 
      1 /* 	$NetBSD: rasops.h,v 1.23 2010/01/21 05:32:18 macallan 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 Andrew Doran.
      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  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #ifndef _RASOPS_H_
     33 #define _RASOPS_H_ 1
     34 
     35 struct wsdisplay_font;
     36 
     37 /* For rasops_info::ri_flg */
     38 #define RI_FULLCLEAR	0x01	/* eraserows() hack to clear full screen */
     39 #define RI_FORCEMONO	0x02	/* monochrome output even if we can do color */
     40 #define RI_BSWAP	0x04	/* framebuffer endianness doesn't match CPU */
     41 #define RI_CURSOR	0x08	/* cursor is switched on */
     42 #define RI_CLEAR	0x10	/* clear display on startup */
     43 #define RI_CENTER	0x20	/* center onscreen output */
     44 #define RI_CURSORCLIP	0x40	/* cursor is currently clipped */
     45 #define RI_CFGDONE	0x80	/* rasops_reconfig() completed successfully */
     46 #define RI_ROTATE_CW	0x100	/* display is rotated, quarter clockwise */
     47 
     48 struct rasops_info {
     49 	/* These must be filled in by the caller */
     50 	int	ri_depth;	/* depth in bits */
     51 	u_char	*ri_bits;	/* ptr to bits */
     52 	int	ri_width;	/* width (pels) */
     53 	int	ri_height;	/* height (pels) */
     54 	int	ri_stride;	/* stride in bytes */
     55 
     56 	/*
     57 	 * If you want shadow framebuffer support, point ri_hwbits
     58 	 * to the real framebuffer, and ri_bits to the shadow framebuffer
     59 	 */
     60 	u_char	*ri_hwbits;
     61 
     62 	/*
     63 	 * These can optionally be left zeroed out. If you fill ri_font,
     64 	 * but aren't using wsfont, set ri_wsfcookie to -1.
     65 	 */
     66 	struct	wsdisplay_font *ri_font;
     67 	int	ri_wsfcookie;	/* wsfont cookie */
     68 	void	*ri_hw;		/* driver private data; ignored by rasops */
     69 	int	ri_crow;	/* cursor row */
     70 	int	ri_ccol;	/* cursor column */
     71 	int	ri_flg;		/* various operational flags */
     72 
     73 	/*
     74 	 * These are optional and will default if zero. Meaningless
     75 	 * on depths other than 15, 16, 24 and 32 bits per pel. On
     76 	 * 24 bit displays, ri_{r,g,b}num must be 8.
     77 	 */
     78 	u_char	ri_rnum;	/* number of bits for red */
     79 	u_char	ri_gnum;	/* number of bits for green */
     80 	u_char	ri_bnum;	/* number of bits for blue */
     81 	u_char	ri_rpos;	/* which bit red starts at */
     82 	u_char	ri_gpos;	/* which bit green starts at */
     83 	u_char	ri_bpos;	/* which bit blue starts at */
     84 
     85 	/* These are filled in by rasops_init() */
     86 	int	ri_emuwidth;	/* width we actually care about */
     87 	int	ri_emuheight;	/* height we actually care about */
     88 	int	ri_emustride;	/* bytes per row we actually care about */
     89 	int	ri_rows;	/* number of rows (characters, not pels) */
     90 	int	ri_cols;	/* number of columns (characters, not pels) */
     91 	int	ri_delta;	/* row delta in bytes */
     92 	int	ri_pelbytes;	/* bytes per pel (may be zero) */
     93 	int	ri_fontscale;	/* fontheight * fontstride */
     94 	int	ri_xscale;	/* fontwidth * pelbytes */
     95 	int	ri_yscale;	/* fontheight * stride */
     96 	u_char  *ri_origbits;	/* where screen bits actually start */
     97 	u_char  *ri_hworigbits;	/* where hw bits actually start */
     98 	int	ri_xorigin;	/* where ri_bits begins (x) */
     99 	int	ri_yorigin;	/* where ri_bits begins (y) */
    100 	int32_t	ri_devcmap[16]; /* color -> framebuffer data */
    101 
    102 	/* The emulops you need to use, and the screen caps for wscons */
    103 	struct	wsdisplay_emulops ri_ops;
    104 	int	ri_caps;
    105 
    106 	/* Callbacks so we can share some code */
    107 	void	(*ri_do_cursor)(struct rasops_info *);
    108 
    109 #if NRASOPS_ROTATION > 0
    110 	/* Used to intercept putchar to permit display rotation */
    111 	struct	wsdisplay_emulops ri_real_ops;
    112 #endif
    113 };
    114 
    115 #define DELTA(p, d, cast) ((p) = (cast)((char *)(p) + (d)))
    116 
    117 #define CHAR_IN_FONT(c,font) 					\
    118        ((c) >= (font)->firstchar && 				\
    119 	((c) - (font)->firstchar) < (font)->numchars)
    120 
    121 /*
    122  * rasops_init().
    123  *
    124  * Integer parameters are the number of rows and columns we'd *like*.
    125  *
    126  * In terms of optimization, fonts that are a multiple of 8 pixels wide
    127  * work the best.
    128  *
    129  * rasops_init() takes care of rasops_reconfig(). The parameters to both
    130  * are the same. If calling rasops_reconfig() to change the font and
    131  * ri_wsfcookie >= 0, you must call wsfont_unlock() on it, and reset it
    132  * to -1 (or a new, valid cookie).
    133  */
    134 
    135 /*
    136  * Per-depth initialization functions. These should not be called outside
    137  * the rasops code.
    138  */
    139 void	rasops1_init(struct rasops_info *);
    140 void	rasops2_init(struct rasops_info *);
    141 void	rasops4_init(struct rasops_info *);
    142 void	rasops8_init(struct rasops_info *);
    143 void	rasops15_init(struct rasops_info *);
    144 void	rasops24_init(struct rasops_info *);
    145 void	rasops32_init(struct rasops_info *);
    146 
    147 /* rasops.c */
    148 int	rasops_init(struct rasops_info *, int, int);
    149 int	rasops_reconfig(struct rasops_info *, int, int);
    150 void	rasops_unpack_attr(long, int *, int *, int *);
    151 void	rasops_eraserows(void *, int, int, long);
    152 void	rasops_erasecols(void *, int, int, int, long);
    153 void	rasops_copycols(void *, int, int, int, int);
    154 
    155 extern const u_char	rasops_isgray[16];
    156 extern const u_char	rasops_cmap[256*3];
    157 
    158 #endif /* _RASOPS_H_ */
    159