/* $XConsortium: mphist.c,v 1.4 94/04/17 20:35:20 rws Exp $ */ /**** module mphist.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. ***************************************************************************** mphist.c -- DDXIE match histogram element Larry Hare -- AGE Logic, Inc. August, 1993 *****************************************************************************/ #define _XIEC_MPHIST #define _XIEC_PHIST /* * Include files */ #include #include #ifndef M_PI #define M_PI 3.14159265358979323846 #endif /* * Core X Includes */ #include #include /* * XIE Includes */ #include #include /* * more X server includes. */ #include #include /* * Server XIE Includes */ #include #include #include #include #include /* routines referenced by other DDXIE modules */ int miAnalyzeMatchHist(); /* routines used internal to this module */ static int CreateMatchHist(); static int InitializeMatchHist(); static int ActivateMatchHist(); static int ResetMatchHist(); static int DestroyMatchHist(); /* DDXIE Match Histogram entry points */ static ddElemVecRec MatchHistVec = { CreateMatchHist, InitializeMatchHist, ActivateMatchHist, (xieIntProc)NULL, ResetMatchHist, DestroyMatchHist }; /* declarations for private structures and actions procs ... */ typedef RealPixel MatchFloat; static void match_hist(), flat_pdf(), gauss_pdf(), hyper_pdf(); typedef struct { CARD32 histphase; CARD32 histsize; CARD32 *histdata; void (*histproc) (); void (*lutproc) (); } miMatchHistRec, *miMatchHistPtr; static void doHistQ(), doHistP(), doHistB(); static void doLutQ(), doLutP(), doLutB(); /*------------------------------------------------------------------------ ------------------- see if we can handle this element -------------------- ------------------------------------------------------------------------*/ int miAnalyzeMatchHist(flo,ped) floDefPtr flo; peDefPtr ped; { /* for now just stash our entry point vector in the peDef */ ped->ddVec = MatchHistVec; return TRUE; } /*------------------------------------------------------------------------ ---------------------------- create peTex . . . -------------------------- ------------------------------------------------------------------------*/ static int CreateMatchHist(flo,ped) floDefPtr flo; peDefPtr ped; { /* attach an execution context to the photo element definition */ /* always force syncing between inputs (is nop if only one input) */ return MakePETex(flo, ped, sizeof(miMatchHistRec), SYNC, NO_SYNC); } /*------------------------------------------------------------------------ ---------------------------- initialize peTex . . . ---------------------- ------------------------------------------------------------------------*/ static int InitializeMatchHist(flo,ped) floDefPtr flo; peDefPtr ped; { peTexPtr pet = ped->peTex; receptorPtr rcp = pet->receptor; bandPtr iband; CARD32 nclip; xieFloMatchHistogram *raw = (xieFloMatchHistogram *)ped->elemRaw; miMatchHistPtr pvt = (miMatchHistPtr)(pet->private); iband = &(pet->receptor[SRCtag].band[0]); SetDepthFromLevels(iband->format->levels,nclip); nclip = 1 << nclip; switch (iband->format->class) { case QUAD_PIXEL: pvt->histproc = doHistQ; pvt->lutproc = doLutQ; break; case PAIR_PIXEL: pvt->histproc = doHistP; pvt->lutproc = doLutP; break; case BYTE_PIXEL: pvt->histproc = doHistB; pvt->lutproc = doLutB; break; default: ImplementationError(flo, ped, return(FALSE)); } pvt->histphase = 1; pvt->histsize = nclip; if (!(pvt->histdata = (CARD32 *) XieCalloc(nclip * sizeof(CARD32)))) AllocError(flo,ped,return(FALSE)); return InitReceptor(flo,ped,&rcp[SRCt1],NO_DATAMAP,1,1,NO_BANDS) && InitProcDomain(flo, ped, raw->domainPhototag, raw->domainOffsetX, raw->domainOffsetY) && InitEmitter(flo,ped,NO_DATAMAP,SRCt1); } /*------------------------------------------------------------------------ ----------------------------- crank some data ---------------------------- ------------------------------------------------------------------------*/ static int ActivateMatchHist(flo,ped,pet) floDefPtr flo; peDefPtr ped; peTexPtr pet; { xieFloMatchHistogram *raw = (xieFloMatchHistogram *)ped->elemRaw; miMatchHistPtr pvt = (miMatchHistPtr)(pet->private); receptorPtr rcp = pet->receptor; bandPtr sbnd = &rcp->band[0]; bandPtr dbnd = &pet->emitter[0]; if (pvt->histphase == 1) { pointer src; src = GetCurrentSrc(flo,pet,sbnd); while(!ferrCode(flo) && src && SyncDomain(flo,ped,sbnd,KEEP)) { INT32 x = 0, dx; while (dx = GetRun(flo,pet,sbnd)) { if (dx > 0) { (*(pvt->histproc)) (src,pvt->histdata,pvt->histsize,x,dx); x += dx; /* nhist += dx; */ } else x -= dx; } src = GetNextSrc(flo,pet,sbnd,KEEP); } /* Is it time to switch to phase2 */ if (src || !sbnd->final) { /* Since we are keeping data for the second pass, we need to keep incrementing the threshold so that we won't get activated until new data is available. */ SetBandThreshold(sbnd, sbnd->current + 1); return (TRUE); } pvt->histphase = 2; } /* finished with accumulation, figure out desired LUT */ if (pvt->histphase == 2) { CARD32 nlev = sbnd->format->levels; CARD32 nclip = pvt->histsize; MatchFloat *pdfdata, pdftemp[256]; /* ** NOTE: Could try to maintain for longer periods of time, ** OR could try to put on stack for small sizes. */ if (nclip <= 256) pdfdata = &pdftemp[0]; else if (!(pdfdata = (MatchFloat *) XieMalloc(nclip*sizeof(MatchFloat)))) AllocError(flo,ped,return(FALSE)); /* generate LUT based on match curve type */ switch (raw->shape) { case xieValHistogramFlat: flat_pdf(NULL, pdfdata, nlev); break; case xieValHistogramGaussian: gauss_pdf((pTecHistogramGaussianDefPtr)ped->techPvt, pdfdata, nlev); break; case xieValHistogramHyperbolic: hyper_pdf((pTecHistogramHyperbolicDefPtr)ped->techPvt, pdfdata, nlev); break; default: if (nclip > 256) (void) XieFree(pdfdata); ImplementationError(flo, ped, return(FALSE)); } /* match the histogram and the new shape */ match_hist(pvt->histdata, pdfdata, nlev); if (nclip > 256) (void) XieFree(pdfdata); if (nclip > nlev) { /* zero tail entries, then mask instead of compare input pixels */ bzero(pvt->histdata + nlev, (nclip - nlev) * sizeof(CARD32)); } /* Reset src to start from scratch. ** The domain automatically resyncs in the SyncDomain call. */ (void) GetSrc(flo,pet,sbnd,0,KEEP); pvt->histphase = 3; } /* now processing to create actual outputs */ if (pvt->histphase == 3) { pointer src, dst; src = GetCurrentSrc(flo,pet,sbnd); dst = GetCurrentDst(flo,pet,dbnd); while(!ferrCode(flo) && src && dst && SyncDomain(flo,ped,dbnd,FLUSH)) { INT32 x = 0, dx; if (src != dst) memcpy (dst, src, dbnd->pitch); while (dx = GetRun(flo,pet,dbnd)) { if (dx > 0) { (*(pvt->lutproc)) (dst,pvt->histdata,pvt->histsize,x,dx); x += dx; /* nhist += dx; */ } else x -= dx; } src = GetNextSrc(flo,pet,sbnd,FLUSH); dst = GetNextDst(flo,pet,dbnd,FLUSH); } FreeData(flo,pet,sbnd,sbnd->current); /* when dbnd->final goes true, we are done */ } return TRUE; } /*------------------------------------------------------------------------ ------------------------ get rid of run-time stuff ----------------------- ------------------------------------------------------------------------*/ static int ResetMatchHist(flo,ped) floDefPtr flo; peDefPtr ped; { miMatchHistPtr pvt = (miMatchHistPtr)(ped->peTex->private); if (pvt && pvt->histdata) pvt->histdata = (CARD32 *) XieFree(pvt->histdata); ResetReceptors(ped); ResetEmitter(ped); return TRUE; } /*------------------------------------------------------------------------ -------------------------- get rid of this element ----------------------- ------------------------------------------------------------------------*/ static int DestroyMatchHist(flo,ped) floDefPtr flo; peDefPtr ped; { /* get rid of the peTex structure */ ped->peTex = (peTexPtr) XieFree(ped->peTex); /* zap this element's entry point vector */ ped->ddVec.create = (xieIntProc) NULL; ped->ddVec.initialize = (xieIntProc) NULL; ped->ddVec.activate = (xieIntProc) NULL; ped->ddVec.reset = (xieIntProc) NULL; ped->ddVec.destroy = (xieIntProc) NULL; return TRUE; } /*------------------------------------------------------------------------ ------------------------ action procs to do histogram -------------------- ------------------------------------------------------------------------*/ /* ** NOTE: Consider revamping Export Client Histogram to not use ** 'pvt' structure so that more sharing of code (and thus potential ** future optimizations) is possible. */ static void doHistQ(svoid,hist,clip,x,dx) pointer svoid; CARD32 *hist, clip, x, dx; { QuadPixel *src = (QuadPixel *) svoid; for ( src += x, clip -= 1; dx > 0 ; dx--) hist[*src++ & clip]++; } static void doHistP(svoid,hist,clip,x,dx) pointer svoid; CARD32 *hist, clip, x, dx; { PairPixel *src = (PairPixel *) svoid; for ( src += x, clip -= 1; dx > 0 ; dx--) hist[*src++ & clip]++; } static void doHistB(svoid,hist,clip,x,dx) pointer svoid; CARD32 *hist, clip, x, dx; { BytePixel *src = (BytePixel *) svoid; for ( src += x, clip -= 1; dx > 0 ; dx--) hist[*src++ & clip]++; } /*------------------------------------------------------------------------ ------------------------ action procs to process lut -------------------- ------------------------------------------------------------------------*/ static void doLutQ(dvoid,lut,clip,x,dx) pointer dvoid; CARD32 *lut, clip, x, dx; { QuadPixel *dst = (QuadPixel *) dvoid; for ( dst += x, clip -= 1; dx > 0 ; dx--, dst++) *dst = lut[*dst & clip]; } static void doLutP(dvoid,lut,clip,x,dx) pointer dvoid; CARD32 *lut, clip, x, dx; { PairPixel *dst = (PairPixel *) dvoid; for ( dst += x, clip -= 1; dx > 0 ; dx--, dst++) *dst = lut[*dst & clip]; } static void doLutB(dvoid,lut,clip,x,dx) pointer dvoid; CARD32 *lut, clip, x, dx; { BytePixel *dst = (BytePixel *) dvoid; for ( dst += x, clip -= 1; dx > 0 ; dx--, dst++) *dst = lut[*dst & clip]; } /*------------------------------------------------------------------------ -------------------------- process matching curves ----------------------- ------------------------------------------------------------------------*/ static void match_hist(hptr, pdf, nlev) CARD32 *hptr; MatchFloat *pdf; CARD32 nlev; { double sum, sf; MatchFloat match, closest, delta; CARD32 ilev, jlev, plev, hsum; /* sum up the probability curve distribution */ for (sum=0., ilev = 0; ilev < nlev; ilev++) sum += pdf[ilev]; /* normalize and accumulate the pdf */ sf = 1.0 / (sum ? sum : 1.0); for (sum=0., ilev = 0; ilev < nlev; ilev++) { sum += pdf[ilev]; pdf[ilev] = sum * sf; } /* count up the histogram entries */ for (hsum=0, ilev = 0; ilev < nlev ; ilev++) { hsum += hptr[ilev]; } /* match the histogram and the new shape */ sf = 1.0 / (double) (hsum ? hsum : 1.0); for (ilev=0, plev=0, hsum=0; ilev < nlev ; ilev++) { hsum += hptr[ilev]; match = (MatchFloat) hsum * sf; /* normalize, accumulate */ /* search forwards to find closest match */ for (jlev = plev, closest = 99.0 ; jlev < nlev ; jlev++) { delta = match - pdf[jlev]; if (delta < 0.) delta = -delta; if (delta == 0.) {jlev++; break; } else if (delta < closest) closest = delta; else if (delta > closest) break; } hptr[ilev] = plev = jlev - 1; } } static void flat_pdf(raw, pdf, nlev) pTecHistogramGaussianDefPtr raw; MatchFloat *pdf; CARD32 nlev; { CARD32 ilev; double sf = 1.0 / (double) nlev; for (ilev = 0; ilev < nlev; ilev++) *pdf++ = sf; } static void gauss_pdf(raw, pdf, nlev) pTecHistogramGaussianDefPtr raw; MatchFloat *pdf; CARD32 nlev; { CARD32 ilev; double mean, sigma, a, b, xx; mean = raw->mean; sigma = raw->sigma; a = 1.0 / sqrt ( 2.0 * M_PI ); /* .39894228 ..... */ b = 2.0 * sigma * sigma; for (ilev = 0; ilev < nlev; ilev++) { xx = (double) ilev - mean; pdf[ilev] = a * exp( - (xx * xx) / b); } } static void hyper_pdf(raw, pdf, nlev) pTecHistogramHyperbolicDefPtr raw; MatchFloat *pdf; CARD32 nlev; { CARD32 ilev; BOOL sf; double cnst, lg; sf = raw->shapeFactor; cnst = raw->constant; lg = log(1.0 + 1.0 / cnst); for (ilev = 0; ilev < nlev; ilev++) pdf[ilev] = 1.0 / (((double)(sf ? nlev-1-ilev : ilev) + cnst) * lg); } /* end module mphist.c */