/* $XConsortium: pdither.c,v 1.6 94/04/17 20:33:45 rws Exp $ */ /**** module pdither.c ****/ /****************************************************************************** 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. 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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. ***************************************************************************** pdither.c -- DIXIE routines for managing the Dither element Larry Hare -- AGE Logic, Inc. May 1993 *****************************************************************************/ #define _XIEC_PDITHER /* * Include files */ #include /* * Core X Includes */ #include #include /* * XIE Includes */ #include #include /* * more X server includes. */ #include #include /* * Server XIE Includes */ #include #include #include #include #include #include /* * routines referenced by other modules */ peDefPtr MakeDither(); Bool CopyPDitherErrorDiffusion(); Bool PrepPDitherErrorDiffusion(); Bool CopyPDitherOrdered(); Bool PrepPDitherOrdered(); /* * routines internal to this module */ static Bool PrepPDither(); static Bool PrepPDitherStandard(); /* * dixie element entry points */ static diElemVecRec pDitherVec = { PrepPDither /* prepare for analysis and execution */ }; /*------------------------------------------------------------------------ -------------------- routine: make a dither element ------------------ ------------------------------------------------------------------------*/ peDefPtr MakeDither(flo,tag,pe) floDefPtr flo; xieTypPhototag tag; xieFlo *pe; { peDefPtr ped; ELEMENT(xieFloDither); ELEMENT_AT_LEAST_SIZE(xieFloDither); ELEMENT_NEEDS_1_INPUT(src); if(!(ped = MakePEDef(1, (CARD32)stuff->elemLength<<2, 0))) FloAllocError(flo,tag,xieElemDither, return(NULL)) ; ped->diVec = &pDitherVec; ped->phototag = tag; ped->flags.process = TRUE; raw = (xieFloDither *)ped->elemRaw; /* * copy the client element parameters (swap if necessary) */ if( flo->reqClient->swapped ) { raw->elemType = stuff->elemType; raw->elemLength = stuff->elemLength; cpswaps(stuff->src, raw->src); raw->bandMask = stuff->bandMask; cpswapl(stuff->levels0, raw->levels0); cpswapl(stuff->levels1, raw->levels1); cpswapl(stuff->levels2, raw->levels2); cpswaps(stuff->lenParams, raw->lenParams); cpswaps(stuff->dither, raw->dither); } else memcpy((char *)raw, (char *)stuff, sizeof(xieFloDither)); /* * copy technique data (if any) */ if(!(ped->techVec = FindTechnique(xieValDither, raw->dither)) || !(ped->techVec->copyfnc(flo, ped, &stuff[1], &raw[1], raw->lenParams, raw->dither == xieValDefault))) TechniqueError(flo,ped,xieValDither,raw->dither,raw->lenParams, return(ped)); /* * assign phototag to inFlo */ ped->inFloLst[SRCtag].srcTag = raw->src; return(ped); } /* end MakePDither */ /*------------------------------------------------------------------------ ---------------- routine: copy routine for no Error Diffusion technique -- ------------------------------------------------------------------------*/ Bool CopyPDitherErrorDiffusion(flo, ped, sparms, rparms, tsize, isDefault) floDefPtr flo; peDefPtr ped; pointer sparms, rparms; CARD16 tsize; Bool isDefault; { VALIDATE_TECHNIQUE_SIZE(ped->techVec, tsize, isDefault); return(tsize == 0); } /*------------------------------------------------------------------------ ---------------- routine: copy routine for Ordered techniques --------- ------------------------------------------------------------------------*/ Bool CopyPDitherOrdered(flo, ped, sparms, rparms, tsize, isDefault) floDefPtr flo; peDefPtr ped; xieTecDitherOrdered *sparms, *rparms; CARD16 tsize; Bool isDefault; { VALIDATE_TECHNIQUE_SIZE(ped->techVec, tsize, isDefault); if (tsize) rparms->thresholdOrder = sparms->thresholdOrder; else rparms->thresholdOrder = 4; return(TRUE); } /*------------------------------------------------------------------------ ---------------- routine: prep routine for no param techniques ------------- ------------------------------------------------------------------------*/ static Bool PrepPDitherStandard(flo, ped, raw, tec) floDefPtr flo; peDefPtr ped; pointer raw, tec; { return(TRUE); } /*------------------------------------------------------------------------ ---------------- routine: prep routine for Error Diffusion techniques ---- ------------------------------------------------------------------------*/ Bool PrepPDitherErrorDiffusion(flo, ped, raw, tec) floDefPtr flo; peDefPtr ped; xieFloDither *raw; pointer tec; { return PrepPDitherStandard(flo, ped, (pointer) raw, tec); } /*------------------------------------------------------------------------ ---------------- routine: prep routine for Ordered technique ------------- ------------------------------------------------------------------------*/ Bool PrepPDitherOrdered(flo, ped, raw, tec) floDefPtr flo; peDefPtr ped; xieFloDither *raw; xieTecDitherOrdered *tec; { return PrepPDitherStandard(flo, ped, (pointer) raw, (pointer) tec); } /*------------------------------------------------------------------------ ---------------- routine: prepare for analysis and execution ------------- ------------------------------------------------------------------------*/ static Bool PrepPDither(flo,ped) floDefPtr flo; peDefPtr ped; { inFloPtr inf = &ped->inFloLst[SRCtag]; outFloPtr src = &inf->srcDef->outFlo; outFloPtr dst = &ped->outFlo; xieFloDither *raw = (xieFloDither *)ped->elemRaw; CARD32 *levels = &(raw->levels0); int b; /* grab a copy of the src attributes and propagate them to our input */ dst->bands = inf->bands = src->bands; for(b = 0; b < src->bands; b++) { dst->format[b] = inf->format[b] = src->format[b]; if ((raw->bandMask & (1<format[b].class) && src->format[b].class == BIT_PIXEL) MatchError(flo, ped, return(FALSE)); if ((dst->format[b].levels = *(levels+b)) > src->format[b].levels) ValueError(flo,ped,*(levels+b),return(FALSE)); } /* Set depth, class, stride, and pitch */ if (UpdateFormatfromLevels(ped) == FALSE) MatchError(flo,ped, return(FALSE)); /* Take care of any technique parameters */ if (!(ped->techVec->prepfnc(flo, ped, raw, &raw[1]))) TechniqueError(flo,ped,xieValDither,raw->dither,raw->lenParams, return(FALSE)); return (TRUE); } /* end module pdither.c */