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grfabs_reg.h revision 1.3 
      1 /*	$NetBSD: grfabs_reg.h,v 1.3 1995/05/21 10:55:57 leo Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1995 Leo Weppelman
      5  * Copyright (c) 1994 Christian E. Hopps
      6  * All rights reserved.
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *      This product includes software developed by Christian E. Hopps.
     18  * 4. The name of the author may not be used to endorse or promote products
     19  *    derived from this software without specific prior written permission
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     22  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     23  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     24  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     25  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     26  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     27  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     28  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     29  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     30  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     31  */
     32 
     33 #ifndef _GRFABS_REG_H
     34 #define _GRFABS_REG_H
     35 
     36 struct point {
     37     long	x;
     38     long	y;
     39 };
     40 typedef struct point point_t;
     41 
     42 struct dimension {
     43     u_long	width;
     44     u_long	height;
     45 };
     46 typedef struct dimension dimen_t;
     47 
     48 struct box {
     49     long	x;
     50     long	y;
     51     u_long	width;
     52     u_long	height;
     53 };
     54 typedef struct box box_t;
     55 
     56 struct rectangle {
     57     long	left;
     58     long	top;
     59     long	right;
     60     long	bottom;
     61 };
     62 typedef struct rectangle rect_t;
     63 
     64 typedef struct bitmap bmap_t;
     65 typedef struct colormap colormap_t;
     66 typedef struct display_mode dmode_t;
     67 
     68 /*
     69  * View stuff.
     70  */
     71 
     72 struct view {
     73     bmap_t	*bitmap;	/* bitmap.				*/
     74     box_t	display;	/* viewable area.			*/
     75     dmode_t	*mode;		/* the mode for this view		*/
     76     colormap_t	*colormap;	/* the colormap for this view		*/
     77     int		flags;
     78 };
     79 typedef struct view view_t;
     80 
     81 /* View-flags: */
     82 #define	VF_DISPLAY	1	/* view is on the air now		*/
     83 
     84 /*
     85  * Bitmap stuff.
     86  */
     87 struct bitmap {
     88     u_short	bytes_per_row;	/* number of bytes per display row.	*/
     89     u_short	rows;		/* number of display rows.		*/
     90     u_short	depth;		/* depth of bitmap.			*/
     91     u_char	*plane;		/* plane data for bitmap.		*/
     92     u_char	*hw_address;	/* mappable bitplane pointer.		*/
     93 };
     94 
     95 /*
     96  * Colormap stuff.
     97  */
     98 struct colormap {
     99     u_char	type;		/* what type of entries these are.	*/
    100     union {
    101         u_char	grey;		/* CM_GREYSCALE				*/
    102         struct {		/* CM_COLOR				*/
    103             u_char	red;
    104             u_char	green;
    105             u_char	blue;
    106         } rgb_mask;
    107     } valid_mask;
    108     u_short	first;		/* color register entry[0] refers to	*/
    109     u_short	size;		/* number of entries			*/
    110     u_long	*entry;		/* the table of actual color values	*/
    111 };
    112 
    113 /*
    114  * Mask short-hands
    115  */
    116 #define grey_mask  valid_mask.grey
    117 #define red_mask   valid_mask.rgb_mask.red
    118 #define green_mask valid_mask.rgb_mask.green
    119 #define blue_mask  valid_mask.rgb_mask.blue
    120 
    121 enum colormap_type {
    122 	CM_MONO,		/* only on or off allowed		*/
    123 	CM_GREYSCALE,		/* grey values				*/
    124 	CM_COLOR		/* RGB values				*/
    125 };
    126 
    127 #define	MAX_CENTRIES		256		/* that all there is	*/
    128 /*
    129  * Create a colormap entry
    130  */
    131 #define	MAKE_COLOR_ENTRY(r,g,b)	(((r & 0xff)<<16)|((g & 0xff)<<8)|(b & 0xf))
    132 #define MAKE_MONO_ENTRY(x)	((x) ? 1 : 0)
    133 #define MAKE_GREY_ENTRY(l)	(l & 0xff)
    134 
    135 #define CM_LTOW(v) \
    136     (((0x000f0000 & (v)) >> 8) | ((0x00000f00 & (v)) >> 4) | (0xf & (v)))
    137 #define CM_WTOL(v) \
    138     (((0xf00 & (v)) << 8) | ((0x0f0 & (v)) << 4) | (0xf & (v)))
    139 
    140 /* display mode */
    141 struct display_mode {
    142     LIST_ENTRY(display_mode)	link;
    143     u_char			*name;		/* logical name for mode. */
    144     dimen_t			size;		/* screen size		  */
    145     u_char			depth;		/* screen depth		  */
    146     u_short			vm_reg;		/* video mode register	  */
    147     view_t			*current_view;	/* view displaying me	  */
    148 };
    149 
    150 /*
    151  * Misc draw related macros.
    152  */
    153 #define INIT_BOX(b,xx,yy,ww,hh)						\
    154 	do {								\
    155 		(b)->x = xx;						\
    156 		(b)->y = yy;						\
    157 		(b)->width = ww;					\
    158 		(b)->height = hh;					\
    159 	} while(0)
    160 
    161 /*
    162  * Prototypes:
    163  */
    164 view_t	*grf_alloc_view __P((dmode_t *d, dimen_t *dim, u_char depth));
    165 dmode_t	*grf_get_best_mode __P((dimen_t *dim, u_char depth));
    166 void	grf_display_view __P((view_t *v));
    167 void	grf_remove_view __P((view_t *v));
    168 void	grf_free_view __P((view_t *v));
    169 int	grf_get_colormap __P((view_t *, colormap_t *));
    170 int	grf_use_colormap __P((view_t *, colormap_t *));
    171 
    172 #endif /* _GRFABS_REG_H */
    173