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/* $XConsortium: xiemd.h,v 1.7 94/04/17 20:35:07 rws Exp $ */
/**** module xiemd.h ****/
/******************************************************************************
Copyright (c) 1993, 1994 X Consortium
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
Except as contained in this notice, the name of the X Consortium shall not be
used in advertising or otherwise to promote the sale, use or other dealings
in this Software without prior written authorization from the X Consortium.
NOTICE
This software is being provided by AGE Logic, Inc. under the
following license. By obtaining, using and/or copying this software,
you agree that you have read, understood, and will comply with these
terms and conditions:
Permission to use, copy, modify, distribute and sell this
software and its documentation for any purpose and without
fee or royalty and to grant others any or all rights granted
herein is hereby granted, provided that you agree to comply
with the following copyright notice and statements, including
the disclaimer, and that the same appears on all copies and
derivative works of the software and documentation you make.
"Copyright 1993, 1994 by AGE Logic, Inc."
THIS SOFTWARE IS PROVIDED "AS IS". AGE LOGIC MAKES NO
REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED. By way of
example, but not limitation, AGE LOGIC MAKE NO
REPRESENTATIONS OR WARRANTIES OF MERCHANTABILITY OR FITNESS
FOR ANY PARTICULAR PURPOSE OR THAT THE SOFTWARE DOES NOT
INFRINGE THIRD-PARTY PROPRIETARY RIGHTS. AGE LOGIC
SHALL BEAR NO LIABILITY FOR ANY USE OF THIS SOFTWARE. IN NO
EVENT SHALL EITHER PARTY BE LIABLE FOR ANY INDIRECT,
INCIDENTAL, SPECIAL, OR CONSEQUENTIAL DAMAGES, INCLUDING LOSS
OF PROFITS, REVENUE, DATA OR USE, INCURRED BY EITHER PARTY OR
ANY THIRD PARTY, WHETHER IN AN ACTION IN CONTRACT OR TORT OR
BASED ON A WARRANTY, EVEN IF AGE LOGIC LICENSEES
HEREUNDER HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH
DAMAGES.
The name of AGE Logic, Inc. may not be used in
advertising or publicity pertaining to this software without
specific, written prior permission from AGE Logic.
Title to this software shall at all times remain with AGE
Logic, Inc.
******************************************************************************
xiemd.h -- DDXIE MI prototype Machine Dependent definitions
Larry Hare -- AGE Logic, Inc. June 1993
*****************************************************************************/
#ifndef _XIEH_MD
#define _XIEH_MD
#include <X.h>
#include <servermd.h>
#include "misc.h" /* for pointer */
#include <Xmd.h>
#ifndef _XIEC_MPBITFUN
extern unsigned char _ByteReverseTable[];
#endif
/*
** Bit operations:
**
** DATATYPE DEPENDENT:
** LogInt - Should be chosen as the largest efficient unsigned type which
** supports C based logical operations, as well as loads and
** stores. This will usually be 32 bit unsigned long, but
** might conceivably be an 64 bit type on some newer machines.
** If you change this, update LOGSHIFT.
** LOGSHIFT - Log2 of LOGSIZE
** LOGSIZE - Size of LogInt in bits. You should make sure your compiler
** knows that this is really 32 and not (4<<3).
** LOGMASK - Make sure your compiler thinks this is 31 and not ((4<<3)-1)
**
** ENDIAN DEPENDENT:
** LOGLEFT - LeftMost bit (from screen perspective) in a LogInt.
** LOGRIGHT - In place shift of a LogInt right 1 bit (in screen perspective)>
**
** LOGINDX,LOGBIT - Used by LOG_xxxbit macros for individual access to bits.
** LOG_tstbit - test if a bit from memory is set.
** LOG_chgbit - test if a bit in memory differs from a constant.
** LOG_setbit,LOG_clrbit,LOG_xorbit - set, clr, or xor a bit in memory.
**
** Some pieces of bit related code have been written to use word loops
** using LogInt Bits at a time. Some algorithms use LOG_xxxbit macros
** to access individual bits.
*/
#ifdef LONG64
typedef CARD64 LogInt;
#define LOGSHIFT (6)
#else
typedef CARD32 LogInt;
#define LOGSHIFT (5)
#endif
#define LOGSIZE (sizeof(LogInt)<<3)
#define LOGMASK (LOGSIZE-1)
#if (IMAGE_BYTE_ORDER == MSBFirst)
#define BitLeft(V,N) ((V) << (N))
#define BitRight(V,N) ((V) >> (N))
#else
#define BitLeft(V,N) ((V) >> (N))
#define BitRight(V,N) ((V) << (N))
#endif /* endian type */
#define LOGLEFT BitLeft(((LogInt)~0),LOGMASK)
#define LOGRIGHT(M) (M=BitRight(M,1))
#define LOGONES ~((LogInt)0)
#define LOGZERO ((LogInt)0)
#define LOGINDX(X) ((X)>>LOGSHIFT)
#define LOGBIT(X) BitRight(LOGLEFT,(X) & LOGMASK)
#define LOG_chgbit(P,N,C) (((P)[LOGINDX(N)] ^ C) & LOGBIT(N))
#define LOG_tstbit(P,N) ((P)[LOGINDX(N)] & LOGBIT(N))
#define LOG_clrbit(P,N) ((P)[LOGINDX(N)] &= ~LOGBIT(N))
#define LOG_setbit(P,N) ((P)[LOGINDX(N)] |= LOGBIT(N))
#define LOG_xorbit(P,N) ((P)[LOGINDX(N)] ^= LOGBIT(N))
/* Special version for unsigned bytes used for byte streams that might not be
LogInt aligned
*/
typedef unsigned char LogByte;
#define LOGBYTESHIFT (3)
#define LOGBYTESIZE (sizeof(LogByte)<<3)
#define LOGBYTEMASK (LOGBYTESIZE-1)
#define LOGBYTELEFT (LogByte)BitLeft(((LogByte)~0),LOGBYTEMASK)
#define LOGBYTERIGHT(M) (LogByte)(M=BitRight(M,1))
#define LOGBYTEONES ~((LogByte)0)
#define LOGBYTEZERO ((LogByte)0)
#define LOGBYTEINDX(X) ((X)>>LOGBYTESHIFT)
#define LOGBYTEBIT(X) BitRight(LOGBYTELEFT,(X) & LOGBYTEMASK)
#define LOGBYTE_chgbit(P,N,C) (((P)[LOGBYTEINDX(N)] ^ C) & LOGBYTEBIT(N))
#define LOGBYTE_tstbit(P,N) ((P)[LOGBYTEINDX(N)] & LOGBYTEBIT(N))
#define LOGBYTE_clrbit(P,N) ((P)[LOGBYTEINDX(N)] &= ~LOGBYTEBIT(N))
#define LOGBYTE_setbit(P,N) ((P)[LOGBYTEINDX(N)] |= LOGBYTEBIT(N))
#define LOGBYTE_xorbit(P,N) ((P)[LOGBYTEINDX(N)] ^= LOGBYTEBIT(N))
/*
** Bit Fun. Fun with Bits. Functions for bits:
**
** bitexpand() - expand a bunch of bits to fg,bg bytes.
*/
pointer bitexpand();
void bitshrink();
void action_clear();
void action_set();
void action_invert();
/*
** We envision a triangular matrix of conversion routines for
** indexing into smaller data quantums, such as to return a byte
** from an array as a short.
*/
/*
** Floating Point Considerations.
**
** The following definitions are used in individual modules. We might
** want to regularaize all these in this one file, or even make these
** into one tyepdef like ProcessFloat. The goal is so that the server
** can consistently use floats instead of doubles on machines which
** can do floats quicker than doubles:
**
** typedef float BlendFloat; (see mpblend.c)
** typedef float ConstrainFloat; (see mpcnst.c)
** typedef float DitherFloat; (see mpdither.c)
** typedef float ConvolveFloat; (see element.h)
** typedef float PasteUpFloat; (see element.h)
**
** Some functions are not yet written to this standard. For instance
** geometry is susceptible to roundoff errors keeping track of scanline
** threshold data maps.
**
** typedef RealPixel GeomFloat;
*/
/*
** USE_FLOATS is used in mpcnst.c to enable the originaly easy to
** program floating point ClipScale routines. The current integer
** based routine no longer does a divide and is hence probably faster
** on all rational machines. We may come up with other choices for
** integer versus floating algorithms in the future. We would perhaps
** like to select between them here.
**
** #define USE_FLOATS
*/
#endif /* module _XIEH_MD */
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