/* $Xorg: ecroi.c,v 1.3 2000/08/17 19:47:23 cpqbld Exp $ */
/**** module ecroi.c ****/
/******************************************************************************

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*****************************************************************************
  
	ecroi.c -- DIXIE routines for managing the ExportClientROI element
  
	Dean Verheiden -- AGE Logic, Inc. August 1993
  
*****************************************************************************/
/* $XFree86: xc/programs/Xserver/XIE/dixie/export/ecroi.c,v 3.4 2001/01/17 22:12:48 dawes Exp $ */

#define _XIEC_ECROI

/*
 *  Include files
 */
  /*
   *  Core X Includes
   */
#define NEED_EVENTS
#include <X.h>
#include <Xproto.h>
  /*
   *  XIE Includes
   */
#include <dixie_e.h>
#include <XIEproto.h>
  /*
   *  Server XIE Includes
   */
#include <corex.h>
#include <macro.h>
#include <element.h>
#include <roi.h>
#include <error.h>

/*
 *  routines internal to this module
 */
static Bool PrepECROI(floDefPtr flo, peDefPtr ped);

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


/*------------------------------------------------------------------------
----------------- routine: make an ExportClientROI element ----------------
------------------------------------------------------------------------*/
peDefPtr MakeECROI(floDefPtr flo, xieTypPhototag tag, xieFlo *pe)
{
  peDefPtr ped;
  inFloPtr inFlo;
  ELEMENT(xieFloExportClientROI);
  ELEMENT_AT_LEAST_SIZE(xieFloExportClientROI);
  ELEMENT_NEEDS_1_INPUT(src);
  
  if(!(ped = MakePEDef(1, (CARD32)stuff->elemLength<<2, 0))) 
    FloAllocError(flo,tag,xieElemExportClientROI, return(NULL));
  
  ped->diVec	     = &eROIVec;
  ped->phototag      = tag;
  ped->flags.export  = TRUE;
  ped->flags.getData = TRUE;
  raw = (xieFloExportClientROI *)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; 
  } else	
    memcpy((char *)raw, (char *)stuff, sizeof(xieFloExportClientROI));
  /*
   * assign phototags to inFlos
   */
  inFlo = ped->inFloLst;
  inFlo[SRCtag].srcTag = raw->src;
  
  return(ped);
}                               /* end MakeECROI */


/*------------------------------------------------------------------------
---------------- routine: prepare for analysis and execution -------------
------------------------------------------------------------------------*/
static Bool PrepECROI(floDefPtr flo, peDefPtr ped)
{
  xieFloExportClientROI *raw = (xieFloExportClientROI *)ped->elemRaw;
  inFloPtr inf   = &ped->inFloLst[SRCtag];
  outFloPtr src  = &inf->srcDef->outFlo;
  outFloPtr dst  = &ped->outFlo;
  
  /* Make sure notify value is valid
   */ 
  if(raw->notify != xieValDisable   &&
     raw->notify != xieValFirstData &&
     raw->notify != xieValNewData)
    ValueError(flo,ped,raw->notify, return(FALSE));
  
  /* Validate and Propagate input attributes to our output */
  if (src->bands != 1 || src->format[0].class != RUN_LENGTH)
    FloSourceError(flo,raw->src,raw->elemType, return(FALSE));
  
  dst->bands = inf->bands = src->bands;
  dst->format[0] = inf->format[0] = src->format[0];
  ped->swapUnits[0] = sizeof(xieTypRectangle);
  
  return(TRUE);
}                               /* end PrepECROI */

/* end module ecroi.c */
