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rasops.h revision 1.20 
      1 /* 	$NetBSD: rasops.h,v 1.20 2007/02/02 02:10:24 ober 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  * 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 
     39 #ifndef _RASOPS_H_
     40 #define _RASOPS_H_ 1
     41 
     42 struct wsdisplay_font;
     43 
     44 /* For rasops_info::ri_flg */
     45 #define RI_FULLCLEAR	0x01	/* eraserows() hack to clear full screen */
     46 #define RI_FORCEMONO	0x02	/* monochrome output even if we can do color */
     47 #define RI_BSWAP	0x04	/* framebuffer endianness doesn't match CPU */
     48 #define RI_CURSOR	0x08	/* cursor is switched on */
     49 #define RI_CLEAR	0x10	/* clear display on startup */
     50 #define RI_CENTER	0x20	/* center onscreen output */
     51 #define RI_CURSORCLIP	0x40	/* cursor is currently clipped */
     52 #define RI_CFGDONE	0x80	/* rasops_reconfig() completed successfully */
     53 #define RI_ROTATE_CW	0x100	/* display is rotated, quarter clockwise */
     54 
     55 struct rasops_info {
     56 	/* These must be filled in by the caller */
     57 	int	ri_depth;	/* depth in bits */
     58 	u_char	*ri_bits;	/* ptr to bits */
     59 	int	ri_width;	/* width (pels) */
     60 	int	ri_height;	/* height (pels) */
     61 	int	ri_stride;	/* stride in bytes */
     62 
     63 	/*
     64 	 * If you want shadow framebuffer support, point ri_hwbits
     65 	 * to the real framebuffer, and ri_bits to the shadow framebuffer
     66 	 */
     67 	u_char	*ri_hwbits;
     68 
     69 	/*
     70 	 * These can optionally be left zeroed out. If you fill ri_font,
     71 	 * but aren't using wsfont, set ri_wsfcookie to -1.
     72 	 */
     73 	struct	wsdisplay_font *ri_font;
     74 	int	ri_wsfcookie;	/* wsfont cookie */
     75 	void	*ri_hw;		/* driver private data; ignored by rasops */
     76 	int	ri_crow;	/* cursor row */
     77 	int	ri_ccol;	/* cursor column */
     78 	int	ri_flg;		/* various operational flags */
     79 
     80 	/*
     81 	 * These are optional and will default if zero. Meaningless
     82 	 * on depths other than 15, 16, 24 and 32 bits per pel. On
     83 	 * 24 bit displays, ri_{r,g,b}num must be 8.
     84 	 */
     85 	u_char	ri_rnum;	/* number of bits for red */
     86 	u_char	ri_gnum;	/* number of bits for green */
     87 	u_char	ri_bnum;	/* number of bits for blue */
     88 	u_char	ri_rpos;	/* which bit red starts at */
     89 	u_char	ri_gpos;	/* which bit green starts at */
     90 	u_char	ri_bpos;	/* which bit blue starts at */
     91 
     92 	/* These are filled in by rasops_init() */
     93 	int	ri_emuwidth;	/* width we actually care about */
     94 	int	ri_emuheight;	/* height we actually care about */
     95 	int	ri_emustride;	/* bytes per row we actually care about */
     96 	int	ri_rows;	/* number of rows (characters, not pels) */
     97 	int	ri_cols;	/* number of columns (characters, not pels) */
     98 	int	ri_delta;	/* row delta in bytes */
     99 	int	ri_pelbytes;	/* bytes per pel (may be zero) */
    100 	int	ri_fontscale;	/* fontheight * fontstride */
    101 	int	ri_xscale;	/* fontwidth * pelbytes */
    102 	int	ri_yscale;	/* fontheight * stride */
    103 	u_char  *ri_origbits;	/* where screen bits actually start */
    104 	int	ri_xorigin;	/* where ri_bits begins (x) */
    105 	int	ri_yorigin;	/* where ri_bits begins (y) */
    106 	int32_t	ri_devcmap[16]; /* color -> framebuffer data */
    107 
    108 	/* The emulops you need to use, and the screen caps for wscons */
    109 	struct	wsdisplay_emulops ri_ops;
    110 	int	ri_caps;
    111 
    112 	/* Callbacks so we can share some code */
    113 	void	(*ri_do_cursor)(struct rasops_info *);
    114 
    115 #if NRASOPS_ROTATION > 0
    116 	/* Used to intercept putchar to permit display rotation */
    117 	struct	wsdisplay_emulops ri_real_ops;
    118 #endif
    119 };
    120 
    121 #define DELTA(p, d, cast) ((p) = (cast)((caddr_t)(p) + (d)))
    122 
    123 #define CHAR_IN_FONT(c,font) 					\
    124        ((c) >= (font)->firstchar && 				\
    125 	((c) - (font)->firstchar) < (font)->numchars)
    126 
    127 /*
    128  * rasops_init().
    129  *
    130  * Integer parameters are the number of rows and columns we'd *like*.
    131  *
    132  * In terms of optimization, fonts that are a multiple of 8 pixels wide
    133  * work the best.
    134  *
    135  * rasops_init() takes care of rasops_reconfig(). The parameters to both
    136  * are the same. If calling rasops_reconfig() to change the font and
    137  * ri_wsfcookie >= 0, you must call wsfont_unlock() on it, and reset it
    138  * to -1 (or a new, valid cookie).
    139  */
    140 
    141 /*
    142  * Per-depth initialization functions. These should not be called outside
    143  * the rasops code.
    144  */
    145 void	rasops1_init(struct rasops_info *);
    146 void	rasops2_init(struct rasops_info *);
    147 void	rasops4_init(struct rasops_info *);
    148 void	rasops8_init(struct rasops_info *);
    149 void	rasops15_init(struct rasops_info *);
    150 void	rasops24_init(struct rasops_info *);
    151 void	rasops32_init(struct rasops_info *);
    152 
    153 /* rasops.c */
    154 int	rasops_init(struct rasops_info *, int, int);
    155 int	rasops_reconfig(struct rasops_info *, int, int);
    156 void	rasops_unpack_attr(long, int *, int *, int *);
    157 void	rasops_eraserows(void *, int, int, long);
    158 void	rasops_erasecols(void *, int, int, int, long);
    159 void	rasops_copycols(void *, int, int, int, int);
    160 
    161 extern const u_char	rasops_isgray[16];
    162 extern const u_char	rasops_cmap[256*3];
    163 
    164 #endif /* _RASOPS_H_ */
    165