/* $XConsortium: mppaste.c,v 1.6 94/04/17 20:35:21 rws Exp $ */
/**** module mppaste.c ****/
/******************************************************************************

Copyright (c) 1993, 1994  X Consortium

Permission is hereby granted, free of charge, to any person obtaining a copy
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The above copyright notice and this permission notice shall be included in
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in this Software without prior written authorization from the X Consortium.


				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
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     "Copyright 1993, 1994 by AGE Logic, Inc."
     
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     example, but not limitation, AGE LOGIC MAKE NO
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     specific, written prior permission from AGE Logic.

     Title to this software shall at all times remain with AGE
     Logic, Inc.
*****************************************************************************
  
	mppaste.c -- DDXIE paste up element
  
	Dean Verheiden, Larry Hare && Robert NC Shelley -- AGE Logic, Inc. 
							   July, 1993
  
*****************************************************************************/

#define _XIEC_MPPASTE
#define _XIEC_PPASTE

/*
 *  Include files
 */
#include <stdio.h>

/*
 *  Core X Includes
 */
#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 <error.h>
#include <macro.h>
#include <element.h>
#include <texstr.h>
#include <xiemd.h>


/*
 *  routines referenced by other DDXIE modules
 */
int	miAnalyzePasteUp();

/*
 *  routines used internal to this module
 */
static int CreatePasteUp();
static int InitializePasteUp();
static int ActivatePasteUp();
static int ResetPasteUp();
static int DestroyPasteUp();

/* Fill functions */
static void FillReal();
static void FillQuad();
static void FillPair(); 
static void FillByte();
static void FillBit();

/* Action functions */
static void PasteReal();
static void PasteQuad();
static void PastePair(); 
static void PasteByte();
static void PasteBit();

/*
 * DDXIE Paste Up entry points
 */
static ddElemVecRec PasteUpVec = {
  CreatePasteUp,
  InitializePasteUp,
  ActivatePasteUp,
  (xieIntProc)NULL,
  ResetPasteUp,
  DestroyPasteUp
  };

/*
 * Local Declarations. 
 */

typedef struct _pasterect {
    Bool   active;	/* indicates this src is not finished yet  */
    INT32  sxoff;	/* src x offset */
    INT32  dxoff;	/* dst x offset */
    INT32  dyoff;	/* dst y offset */
    CARD32 width;	/* clipped width  of src on output window */
    CARD32 height;	/* clipped height of src on output window */
    CARD32 receptorIndex;
} PasteRectRec, *PasteRectPtr;

typedef struct _mppasteupdef {
	void	     (*fill)();
	void	     (*action)();
	INT32	     nextline;
	CARD32       iconstant;
	CARD32	     numRects;	/* Number of interesting src for this band */
	PasteRectPtr rects;
} mpPasteUpPvtRec, *mpPasteUpPvtPtr;


/*------------------------------------------------------------------------
----------------------------- Analyze ------------------------------------
------------------------------------------------------------------------*/
int miAnalyzePasteUp(flo,ped)
     floDefPtr flo;
     peDefPtr  ped;
{
  /* for now just stash our entry point vector in the peDef */
  ped->ddVec = PasteUpVec;

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

/*------------------------------------------------------------------------
---------------------------- create peTex . . . --------------------------
------------------------------------------------------------------------*/
static int CreatePasteUp(flo,ped)
     floDefPtr flo;
     peDefPtr  ped;
{
  int auxsize = xieValMaxBands * sizeof(mpPasteUpPvtRec);

  /* Force syncing between sources, but not bands */
  return (MakePETex(flo, ped, auxsize, SYNC, NO_SYNC) );
}                               /* end CreatePasteUp */


/*------------------------------------------------------------------------
---------------------------- initialize peTex . . . ----------------------
------------------------------------------------------------------------*/
static int InitializePasteUp(flo,ped)
     floDefPtr flo;
     peDefPtr  ped;
{
  xieFloPasteUp *raw   = (xieFloPasteUp *)ped->elemRaw;
  peTexPtr pet	       = ped->peTex;
  CARD32 nbands	       = pet->receptor[SRCt1].inFlo->bands;
  PasteUpFloat *fconst = ((pPasteUpDefPtr)ped->elemPvt)->constant;
  mpPasteUpPvtPtr pvt;
  xieTypTile *tp;
  bandPtr iband, oband;		
  CARD32 b, t;

  if (!(InitReceptors(flo, ped, NO_DATAMAP, 1) && 
	InitEmitter(flo, ped, NO_DATAMAP, NO_INPLACE)))
    return (FALSE);

  /* Figure out the appropriate action vector */
  /* Use first source for the band types since they all must be the same */
  iband  = &(pet->receptor[SRCt1].band[0]);
  pvt = (mpPasteUpPvtPtr)pet->private;
  for(b = 0; b < nbands; b++, pvt++, iband++, fconst++) {

      /* Zero out "interesting" rectangle counters */
      pvt->numRects = 0;
      pvt->nextline = pet->emitter[b].format->height - 1;

      /* Clip fill for constrained data */
      if (IsConstrained(iband->format->class))
          pvt->iconstant = ConstrainConst(*fconst,iband->format->levels);

      switch (iband->format->class) {
      case UNCONSTRAINED:     
		pvt->fill   = FillReal; 
		pvt->action = PasteReal; 
		break;
      case QUAD_PIXEL:        
		pvt->fill   = FillQuad; 
		pvt->action = PasteQuad; 
		break;
      case PAIR_PIXEL:        
		pvt->fill   = FillPair; 
		pvt->action = PastePair; 
		break;
      case BYTE_PIXEL:        
		pvt->fill   = FillByte; 
		pvt->action = PasteByte; 
		break;
      case BIT_PIXEL:         
		pvt->fill   = FillBit; 
		pvt->action = PasteBit; 
		break;
      default:  
		ImplementationError(flo, ped, return(FALSE));
                break;
      }
  }

  /* Disable completely clipped srcs, determine minimum y of non clipped src */
  tp = (xieTypTile *)&(raw[1]);
  for (t = 0; t < raw->numTiles; t++, tp++)  {
	iband = &(pet->receptor[t].band[0]);
	oband = &pet->emitter[0];
  	pvt   = (mpPasteUpPvtPtr)pet->private;
	for(b = 0; b < nbands; b++, iband++, oband++, pvt++) {
  	    INT32 dst_width  = oband->format->width;
  	    INT32 dst_height = oband->format->height;
	    if ((tp->dstY +  (INT32)iband->format->height) <= 0 ||
	        (tp->dstX +  (INT32)iband->format->width)  <= 0 ||
	        (tp->dstX >= dst_width) 	  		||
	        (tp->dstY >= dst_height)) 
		    DisableSrc(flo,pet,iband,FLUSH);
	    else {
	        pvt->numRects++;
		if (tp->dstY < pvt->nextline) 
			pvt->nextline = (tp->dstY > 0) ? tp->dstY : 0;
	    }
	}
  }

  /* Allocate space for srcs that are not completely clipped */
  pvt = (mpPasteUpPvtPtr)pet->private;
  for (b = 0; b < nbands; b++, pvt++) 
	if (pvt->numRects) {
	    pvt->rects = 
		(PasteRectPtr)XieMalloc(pvt->numRects * sizeof(PasteRectRec));
	    pvt->numRects = 0; /* Will be used as list is built */
	} else
	    pvt->rects = (PasteRectPtr)NULL;

  /* 
     Build list for each band containing srcs that are displayed, adjust 
     thresholds for srcs without minimum y 
  */
  tp = (xieTypTile *)&(raw[1]);
  for (t = 0; t < raw->numTiles; t++, tp++)  {
	CARD8 amask = 1, active = pet->receptor[t].active;
	iband = &(pet->receptor[t].band[0]);
	oband = &pet->emitter[0];
  	pvt   = (mpPasteUpPvtPtr)pet->private;
	for(b = 0; b < nbands; b++, iband++, oband++, amask <<= 1, pvt++) {
	    if (active & amask) {
  	        INT32 dst_width  = oband->format->width;
  	        INT32 dst_height = oband->format->height;
		PasteRectPtr pr  = &(pvt->rects[pvt->numRects++]); /* Yuck */

		pr->active = TRUE;
		pr->receptorIndex = t;
		if (tp->dstX >= 0) {			/* clip left */
		    pr->sxoff = 0;
		    pr->dxoff = tp->dstX;
		    pr->width = iband->format->width;
    		} else {
		    pr->sxoff = -tp->dstX;
		    pr->dxoff = 0;
		    pr->width = iband->format->width - pr->sxoff;
		}
		if (pr->dxoff + pr->width > dst_width)	/* clip right */
		    pr->width = dst_width - pr->dxoff;

		if (tp->dstY >= 0) {			/* clip top */
		    pr->dyoff  = tp->dstY;
		    pr->height = iband->format->height;
		} else {
		    pr->dyoff  = 0;
		    pr->height = iband->format->height - (-tp->dstY);
		}
		if (pr->dyoff + pr->height > dst_height)/* clip bottom */
		    pr->height = dst_height - pr->dyoff;
		    
		/* Adjust thresholds if necessary */
        	if (tp->dstY != pvt->nextline) {
	            if (tp->dstY > pvt->nextline) 
	        	IgnoreBand(iband);
	            else 
	                SetBandThreshold(iband,-tp->dstY+1);
	        }
	    }
	}
  }

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

/*------------------------------------------------------------------------
------------------------ crank some single input data --------------------
------------------------------------------------------------------------*/
static int ActivatePasteUp(flo,ped,pet)
     floDefPtr flo;
     peDefPtr  ped;
     peTexPtr  pet;
{
  pPasteUpDefPtr pvt   = (pPasteUpDefPtr) ped->elemPvt;
  PasteUpFloat *fconst = pvt->constant;
  receptorPtr rcp      = pet->receptor;
  CARD32 bands         = rcp[SRCt1].inFlo->bands;
  bandPtr dbnd         = &pet->emitter[0];
  mpPasteUpPvtPtr mpvt = (mpPasteUpPvtPtr) pet->private;
  pointer src, dst;
  PasteRectPtr tp;
  CARD32 t, b;
  
    for(b = 0; b < bands; b++, dbnd++, mpvt++, fconst++) {
	INT32 dst_width = dbnd->format->width;

	/* Get pointer for dst scanline, Fill with constant */
	if (!(dst = GetCurrentDst(flo,pet,dbnd)))
	    break;

	(*(mpvt->fill)) (dst,*fconst,mpvt->iconstant,dst_width);

	/* Skip any constant lines */
	if (dbnd->current < mpvt->nextline) {
	    while (dbnd->current < mpvt->nextline)  {
		if (dst = GetNextDst(flo,pet,dbnd,KEEP)) {
		    (*(mpvt->fill)) (dst,*fconst,mpvt->iconstant,dst_width);
		} else {
		    PutData(flo,pet,dbnd,dbnd->current);
		    return TRUE;
		}
	    }
	}

	mpvt->nextline = dbnd->format->height;
  	tp = mpvt->rects;
	for (t = 0; t < mpvt->numRects; t++, tp++){
	    bandPtr sbnd = &rcp[tp->receptorIndex].band[b];
	    INT32 tdy = tp->dyoff;
	    INT32 tdend = tdy + tp->height;

	    if (!tp->active) continue;

	    /* see if this src has a line for the destination */
	    if ((INT32)dbnd->current >= tdy && (INT32)dbnd->current < tdend) {

	        if (sbnd->threshold > 1) {
		    src = GetSrc(flo,pet,sbnd,sbnd->threshold - 1,KEEP);
		    SetBandThreshold(sbnd,1);
		} else 
		    src = GetCurrentSrc(flo,pet,sbnd);
		if (!src) 	/* all tiles for this line should be ready */
		    ImplementationError(flo, ped, return(FALSE));

	        (*(mpvt->action)) (src, tp->sxoff, dst, tp->dxoff, tp->width);

		FreeData(flo,pet,sbnd,sbnd->current+1);
		if ((dbnd->current + 1) < tdend)
		    mpvt->nextline = dbnd->current + 1;
		else
		    tp->active = FALSE;
	    } else if (tdy == (dbnd->current + 1)) {
		/* Tile missed on this line but will be needed for next line */
		AttendBand(sbnd);
		mpvt->nextline = dbnd->current + 1;
	    } else if (tdy < mpvt->nextline) {
		mpvt->nextline = tdy;
	    }
	}
		
	if (mpvt->nextline < dbnd->format->height) {
	    /* ... still more tiles to copy */
	    (void) GetNextDst(flo,pet,dbnd,FLUSH);
	    if (mpvt->nextline != dbnd->current) {
	        /* ... find the Next bunch of tiles */
  		tp = mpvt->rects;
		for (t = 0; t < mpvt->numRects; t++, tp++)
		    if (tp->active && tp->dyoff == mpvt->nextline) {
		        AttendBand(&rcp[tp->receptorIndex].band[b]);
		    }
	    }
	} else {
	    /* ... fill in remaining destination with constant */
	    while((dst = GetNextDst(flo,pet,dbnd,KEEP)))
	        (*(mpvt->fill)) (dst,*fconst,mpvt->iconstant,dst_width);
	    PutData(flo,pet,dbnd,dbnd->current);
	} 

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

/*------------------------------------------------------------------------
------------------------ get rid of run-time stuff -----------------------
------------------------------------------------------------------------*/
static int ResetPasteUp(flo,ped)
     floDefPtr flo;
     peDefPtr  ped;
{
  peTexPtr	  pet = ped->peTex;
  mpPasteUpPvtPtr pvt = (mpPasteUpPvtPtr)pet->private;
  CARD32 nbands       = pet->receptor[SRCt1].inFlo->bands;
  CARD32 b;

  /* Free any lists that were malloced */
  for (b = 0; b < nbands; b++, pvt++)
	if (pvt->rects)
		pvt->rects = (PasteRectPtr)XieFree(pvt->rects);

  ResetReceptors(ped);
  ResetEmitter(ped);

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

/*------------------------------------------------------------------------
-------------------------- get rid of this element -----------------------
------------------------------------------------------------------------*/
static int DestroyPasteUp(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.flush      = (xieIntProc)NULL;
  ped->ddVec.reset      = (xieIntProc)NULL;
  ped->ddVec.destroy    = (xieIntProc)NULL;
  
  return(TRUE);
}                               /* end DestroyPasteUp */

/*------------------------------------------------------------------------
--------------------------PasteUp fill routines  ------------------------
------------------------------------------------------------------------*/
static void FillReal(dst,ffill,ifill,width) 
	RealPixel *dst;
	PasteUpFloat ffill;
	CARD32	ifill,width;
{
	while (width-- > 0) *dst++ = ffill;			
}

#define PasteFill(fname,stype)					\
static void fname(din,ffill,ifill,width)	 		\
pointer din;							\
PasteUpFloat ffill;						\
CARD32 ifill,width;						\
{								\
stype *dst = (stype *)din, fill = (stype)ifill;			\
	while (width-- > 0) *dst++ = fill;			\
}

PasteFill(FillQuad,QuadPixel)
PasteFill(FillPair,PairPixel)
PasteFill(FillByte,BytePixel)


static void FillBit(dst,ffill,ifill,width) 
	BitPixel *dst;
	PasteUpFloat ffill;
	CARD32	ifill,width;
{
	memset((char *)dst, (ifill ? ~0 : 0), (width+7)>>3);
}

/*------------------------------------------------------------------------
--------------------------PasteUp action routines  ----------------------
------------------------------------------------------------------------*/

#define PasteAction(fname,stype)				\
static void fname(sin,s_off,din,d_off,width) 			\
CARD32 width, s_off, d_off;					\
pointer sin, din;						\
{								\
stype *src = (stype *)sin, *dst = (stype *)din;			\
	src += s_off;						\
	dst += d_off;						\
	while (width-- > 0) *dst++ = *src++;			\
}

PasteAction(PasteReal,RealPixel)
PasteAction(PasteQuad,QuadPixel)
PasteAction(PastePair,PairPixel)
PasteAction(PasteByte,BytePixel)

static void PasteBit(sin,s_off,din,d_off,width)
	CARD32 width, s_off, d_off;
	pointer sin, din;
{
	LogInt * src = (LogInt *) sin;
	LogInt * dst = (LogInt *) din;
	for ( ; width-- > 0 ; s_off++, d_off++ ) {
	    if (LOG_tstbit(src,s_off))
		LOG_setbit(dst,d_off);
	    else
		LOG_clrbit(dst,d_off);
	}
}

/* end module mppaste.c */