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/* $OpenBSD: raster.h,v 1.5 2003/06/02 23:28:03 millert Exp $ */
/* $NetBSD: raster.h,v 1.3 1995/11/24 23:50:51 cgd Exp $ */
/*-
* Copyright (c) 1991, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to the Computer Systems
* Engineering Group at Lawrence Berkeley Laboratory and to the University
* of California at Berkeley by Jef Poskanzer.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)raster.h 8.1 (Berkeley) 6/11/93
*/
/*
* Simple raster and frame buffer routines.
*
* Currently this set of routines is fairly minimal. It's enough to
* implement a console terminal emulator on monochrome and pseudocolor
* screens, and that's about it.
*
* Future additions might be other kinds of frame buffers (direct color?),
* lines, dashed lines, three-operand blits (stipples/stencils), etc.
*/
#ifndef _RASTER_H_
#define _RASTER_H_
/* Configurable definitions. */
#include <machine/endian.h>
#if BYTE_ORDER == BIG_ENDIAN
/* CONFIGURE: define or undef for your machine's byte order */
#define MSBYTE_FIRST
/* CONFIGURE: define or under for your frame buffer's bit order */
#define MSBIT_FIRST
#endif
/* CONFIGURE: The text routines can optionally keep a cache of 8-bit
** characters. This uses about 30K, but makes text on a color screen
** go 3.2 times faster.
*/
#undef COLORFONT_CACHE
/* Definitions. */
/* ANSI prototype conditionalizer. */
#ifndef ARGS
#if __STDC__
#define ARGS(alist) alist
#else /*__STDC__*/
#define ARGS(alist) ()
#endif /*__STDC__*/
#endif /*ARGS*/
/* Raster struct. */
struct raster {
int width, height; /* size in pixels */
int depth; /* bits per pixel - 1 or 8 */
int linelongs; /* longs from one line to the next - for padding */
u_int32_t *pixels; /* pointer to the actual bits */
caddr_t data; /* special pointer for frame buffers and subregions */
};
/* Colormap struct. */
struct raster_colormap {
int length;
u_char *red;
u_char *grn;
u_char *blu;
};
/* Font character struct. */
struct raster_char {
struct raster* r;
int homex, homey;
int nextx, nexty;
};
#ifdef COLORFONT_CACHE
struct raster_fontcache {
struct raster* cr[256];
u_char color[256];
};
#endif /*COLORFONT_CACHE*/
/* Font struct. */
struct raster_font {
int width, height, ascent; /* nominal character size */
int flags;
#define RASFONT_FIXEDWIDTH 0x1
#define RASFONT_NOVERTICALMOVEMENT 0x2
struct raster_char chars[256];
#ifdef COLORFONT_CACHE
struct raster_fontcache* cache;
#endif /*COLORFONT_CACHE*/
};
/* Defines for the raster_op() and raster_text() rop parameter - the bitblit
** operation. A rop can be some Boolean combination of RAS_SRC and
** RAS_DST. For instance, just RAS_SRC means copy the source to the
** destination without modification. RAS_SRC|RAS_DST means "or" the source
** and destination together, while "xor" would be RAS_SRC^RAS_DST. The
** RAS_NOT macro should be used to express negation - RAS_NOT(RAS_SRC)&RAS_DST
** would "and" the complement of the source with the destination.
**
** Or, you can just use one of the pre-defined ops. There are only 16
** possible combinations, so all 16 are defined here.
**
** For color rasters, you specify the color of the operation by simply
** oring RAS_COLOR(color) into the rop.
*/
#define RAS_NOT(op) ( 0xf & ( ~ (op) ) )
#define RAS_CLEAR 0x0 /* 0 */
#define RAS_NOTOR 0x1 /* !( src | dst ) */
#define RAS_NOTSRC_AND_DST 0x2 /* !src & dst */
#define RAS_INVERTSRC 0x3 /* !src */
#define RAS_SRC_AND_NOTDST 0x4 /* src & !dst */
#define RAS_INVERT 0x5 /* !dst */
#define RAS_XOR 0x6 /* src ^ dst */
#define RAS_NOTAND 0x7 /* !( src & dst ) */
#define RAS_AND 0x8 /* src & dst */
#define RAS_NOTXOR 0x9 /* !( src ^ dst ) */
#define RAS_DST 0xa /* dst */
#define RAS_NOTSRC_OR_DST 0xb /* !src | dst */
#define RAS_SRC 0xc /* src */
#define RAS_SRC_OR_NOTDST 0xd /* src | !dst */
#define RAS_OR 0xe /* src | dst */
#define RAS_SET 0xf /* 1 */
#define RAS_COLOR(color) ( ( (color) & 0xff ) << 4 )
/* Get the op from a rop. */
#define RAS_GETOP(op) ( (op) & 0xf )
/* Get the color from a rop. */
#define RAS_GETCOLOR(op) ( ( (op) >> 4 ) & 0xff )
/* Get the longword address of a pixel. */
#define RAS_ADDR( r, x, y ) \
( (r)->pixels + (y) * (r)->linelongs + (x) * (r)->depth / 32 )
/* Raster routines. */
extern struct raster* raster_alloc ARGS(( int width, int height, int depth ));
/* Allocates a raster. Returns (struct raster*) 0 on failure. */
extern void raster_free ARGS(( struct raster* r ));
/* Frees/closes a raster. */
extern int raster_get ARGS(( struct raster* r, int x, int y ));
/* Gets a single pixel from a raster. */
extern void raster_put ARGS(( struct raster* r, int x, int y, int v ));
/* Puts a single pixel into a raster. */
extern struct raster* raster_subregion ARGS(( struct raster* r, int x, int y, int width, int height ));
/* Makes a raster that points to a region of another. Returns
** (struct raster*) 0 on failure.
*/
/* Raster operations. */
extern int raster_op ARGS(( struct raster* dst, int dx, int dy, int w, int h, int rop, struct raster* src, int sx, int sy ));
/* Performs a bitblit. Returns 0 on success, -1 on failure. */
extern int raster_op_noclip ARGS(( struct raster* dst, int dx, int dy, int w, int h, int rop, struct raster* src, int sx, int sy ));
/* Bitblit without clipping. Returns 0 on success, -1 on failure. */
extern int raster_op_nosrc_noclip ARGS(( struct raster* dst, int dx, int dy, int w, int h, int rop ));
/* No-src bitblit without clipping. Returns 0 on success, -1 on failure. */
extern int raster_replsrc ARGS(( struct raster* dst, int dx, int dy, int w, int h, int rop, struct raster* src, int sx, int sy ));
/* Tiles the src to fit the dst. Returns 0 on success, -1 on failure. Only
** implements RAS_SRC.
*/
/* Raster text routines */
extern struct raster_font* raster_fontopen ARGS(( char *fontname ));
/* Opens a font. Returns (struct raster_font*) 0 on failure. */
extern int raster_text ARGS(( struct raster* r, int x, int y, int rop, struct raster_font* rf, unsigned char *text ));
/* Draws text. Returns 0 on success, -1 on failure. */
extern int raster_textn ARGS(( struct raster* r, int x, int y, int rop, struct raster_font* rf, unsigned char *text, int len ));
/* Draws n characters of text. Returns 0 on success, -1 on failure. */
extern void raster_fontclose ARGS(( struct raster_font* rf ));
/* Closes a font. */
/* Frame buffer routines. */
extern struct raster* raster_open ARGS(( char *fbname ));
/* Opens a frame buffer as a raster. Returns (struct raster*) 0 on failure. */
extern struct raster* raster_coloropen ARGS(( void ));
/* Opens a color frame buffer if there is one. Returns (struct raster*) 0 on
** failure.
*/
extern int raster_video_off ARGS(( struct raster* r ));
/* Blanks the screen. Returns 0 on success, -1 on failure. This might
** be implemented as actual video blanking, or it might just load black
** into all colormap entries (and disable further colormap changes).
*/
extern int raster_video_on ARGS(( struct raster* r ));
/* Re-enables video. Returns 0 on success, -1 on failure. */
extern struct raster_colormap* raster_colormap_alloc ARGS(( int length ));
/* Allocates a colormap structure, returns 0 on failure. */
extern struct raster_colormap* raster_colormap_get ARGS(( struct raster* r ));
/* Allocates a colormap structure and returns the frame buffer's
** current colormap, or (struct raster_colormap*) 0 on failure. The raster
** must be one returned by raster_open(), not raster_alloc().
*/
extern int raster_colormap_set ARGS(( struct raster* r, struct raster_colormap* cm ));
/* Sets a frame buffer's colormap. The raster must be one returned
** by raster_open(), not raster_alloc(). Returns 0 on success, -1 on
** failure.
*/
extern void raster_colormap_free ARGS(( struct raster_colormap* cm ));
/* Frees a colormap. */
#endif /*_RASTER_H_*/
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