/* $XConsortium: echist.c,v 1.3 94/04/17 20:33:27 rws Exp $ */
/* $XFree86: xc/programs/Xserver/XIE/dixie/export/echist.c,v 3.0 1996/03/29 22:10:07 dawes Exp $ */
/**** module echist.c ****/
/******************************************************************************

Copyright (c) 1993, 1994  X Consortium

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				NOTICE
                              
This software is being provided by AGE Logic, Inc. under the
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*****************************************************************************
  
	echist.c -- DIXIE routines for managing the ExportClientHistogram elem.
  
	Dean Verheiden -- AGE Logic, Inc. July 1993
  
*****************************************************************************/

#define _XIEC_ECHIST

/*
 *  Include files
 */
#include <stdio.h>
  /*
   *  Core X Includes
   */
#define NEED_EVENTS
#include <X.h>
#include <Xproto.h>
  /*
   *  XIE Includes
   */
#include <XIE.h>
#include <XIEproto.h>
  /*
   *  more X server includes.
   */
#include <misc.h>
#include <dixstruct.h>
  /*
   *  Server XIE Includes
   */
#include <corex.h>
#include <macro.h>
#include <element.h>
#include <error.h>


/*
 *  routines referenced by other modules.
 */
peDefPtr	MakeECHistogram();

/*
 *  routines internal to this module
 */
static Bool	PrepECHistogram();

/*
 * dixie entry points
 */
static diElemVecRec eHistogramVec = {
    PrepECHistogram			/* prepare for analysis and execution	*/
    };


/*------------------------------------------------------------------------
-------------- routine: make an ExportClientHistogram element ------------
------------------------------------------------------------------------*/
peDefPtr MakeECHistogram(flo,tag,pe)
floDefPtr      flo;
xieTypPhototag tag;
xieFlo        *pe;
{
    int inputs;
    peDefPtr ped;
    inFloPtr inFlo;
    ELEMENT(xieFloExportClientHistogram);
    ELEMENT_SIZE_MATCH(xieFloExportClientHistogram);
    ELEMENT_NEEDS_1_INPUT(src);

    inputs = 1 + (stuff->domainPhototag ? 1 : 0);

    if(!(ped = MakePEDef(inputs, (CARD32)stuff->elemLength<<2, 0))) 
	FloAllocError(flo,tag,xieElemExportClientHistogram, return(NULL));

    ped->diVec	       = &eHistogramVec;
    ped->phototag      = tag;
    ped->flags.export  = TRUE;
    ped->flags.getData = TRUE;
    raw = (xieFloExportClientHistogram *)ped->elemRaw;
    /*
     * copy the standard client element parameters (swap if necessary)
     */
    if (flo->reqClient->swapped) {
    	raw->elemType   = stuff->elemType;
    	raw->elemLength = stuff->elemLength;
    	cpswaps(stuff->src, raw->src);
	raw->notify = stuff->notify;
	cpswapl(stuff->domainOffsetX, raw->domainOffsetX);
	cpswapl(stuff->domainOffsetY, raw->domainOffsetY);
	cpswaps(stuff->domainPhototag,raw->domainPhototag);
    } else	
    	memcpy((char *)raw, (char *)stuff, sizeof(xieFloExportClientHistogram));
    /*
     * assign phototags to inFlos
     */
    inFlo = ped->inFloLst;
    inFlo[SRCtag].srcTag = raw->src;
    if(raw->domainPhototag)
	inFlo[ped->inCnt-1].srcTag = raw->domainPhototag;

    return(ped);
}                                  /* end MakeECHistogram */


/*------------------------------------------------------------------------
---------------- routine: prepare for analysis and execution -------------
------------------------------------------------------------------------*/
static Bool PrepECHistogram(flo,ped)
     floDefPtr  flo;
     peDefPtr   ped;
{
  xieFloExportClientHistogram *raw = 
    			(xieFloExportClientHistogram *)ped->elemRaw;
  inFloPtr ind, inf = &ped->inFloLst[SRCtag];
  outFloPtr     src = &inf->srcDef->outFlo;
  outFloPtr  outflo = &ped->outFlo;

  /* check notify */
  if(raw->notify != xieValDisable   &&		  
     raw->notify != xieValFirstData &&
     raw->notify != xieValNewData)
    ValueError(flo,ped,raw->notify, return(FALSE));

  /* check out process domain */
  if(raw->domainPhototag) {
    outFloPtr dom;

    ind = &ped->inFloLst[ped->inCnt-1];
    dom = &ind->srcDef->outFlo;
    if((ind->bands = dom->bands) != 1 || IsntDomain(dom->format[0].class)) 
	DomainError(flo,ped,raw->domainPhototag, return(FALSE));
    ind->format[0] = dom->format[0];
  }

  /* check and propagate src */
  if (src->bands != 1 || IsntConstrained(src->format[0].class))
	MatchError(flo,ped,return(FALSE));
  inf->bands = 1;
  inf->format[0] = src->format[0];
  
  /* Don't really have an outflo */
  outflo->bands = 1;
  outflo->format[0] = inf->format[0];
  outflo->format[0].class  = STREAM;
  ped->swapUnits[0] = sizeof(xieTypHistogramData);

  return(TRUE);
}                                  /* end PrepECHistogram */

/* end module echist.c */
