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grfabs_reg.h revision 1.1 
      1 /*	$NetBSD: grfabs_reg.h,v 1.1 1995/03/26 07:12:15 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_short	nentries;	/* number of entries in the map		*/
    100     u_short	*centry;	/* actual colormap			*/
    101 };
    102 
    103 /*
    104  * Create a colormap entry
    105  */
    106 #define	MAKE_CENTRY(r,g,b)	(((r & 0xf)<<8)|((g & 0xf)<<4)|(b & 0xf))
    107 #define	MAX_CENTRIES		256		/* that all there is	*/
    108 
    109 /* display mode */
    110 struct display_mode {
    111     LIST_ENTRY(display_mode)	link;
    112     u_char			*name;		/* logical name for mode. */
    113     dimen_t			size;		/* screen size		  */
    114     u_char			depth;		/* screen depth		  */
    115     u_short			vm_reg;		/* video mode register	  */
    116     view_t			*current_view;	/* view displaying me	  */
    117 };
    118 
    119 /*
    120  * Misc draw related macros.
    121  */
    122 #define INIT_BOX(b,xx,yy,ww,hh)						\
    123 	do {								\
    124 		(b)->x = xx;						\
    125 		(b)->y = yy;						\
    126 		(b)->width = ww;					\
    127 		(b)->height = hh;					\
    128 	} while(0)
    129 
    130 /*
    131  * Prototypes:
    132  */
    133 view_t	*grf_alloc_view __P((dmode_t *d, dimen_t *dim, u_char depth));
    134 void	grf_display_view __P((view_t *v));
    135 void	grf_remove_view __P((view_t *v));
    136 void	grf_free_view __P((view_t *v));
    137 int	grf_get_colormap __P((view_t *, colormap_t *));
    138 int	grf_use_colormap __P((view_t *, colormap_t *));
    139 
    140 #endif /* _GRFABS_REG_H */
    141