/* $Xorg: xiemd.h,v 1.3 2000/08/17 19:47:46 cpqbld Exp $ */ /* AGE Logic - Oct 15 1995 - Larry Hare */ /**** module xiemd.h ****/ /****************************************************************************** Copyright 1993, 1994, 1998 The Open Group All Rights Reserved. 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 OPEN GROUP 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 Open Group 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 Open Group. 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". 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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 #include #include "misc.h" /* for pointer */ #include #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(); void zero_even(); /* ** 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 */ /* ** SF_DITHER - use scaled fractions in floyd steinberg dither for byte ** and pair pixels; quad pixel operations are still done with floats. ** If you have software floating point, you will definitely want to turn ** this code on. Machines with an fpu generally perform at least as good ** with the floating point code. ** ** #define SF_DITHER */ #if defined(_AM29K) || defined(__i960__) || defined(_LR33020_) || defined(gsp) #define SF_DITHER #endif #endif /* module _XIEH_MD */