path: root/xc/programs/Xserver/XIE/mixie/export/medrawp.c

/* $XConsortium: medrawp.c,v 1.6 94/01/12 20:08:05 rws Exp $ */
/**** module medrawp.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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     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
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     example, but not limitation, AGE LOGIC MAKE NO
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     FOR ANY PARTICULAR PURPOSE OR THAT THE SOFTWARE DOES NOT
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     OF PROFITS, REVENUE, DATA OR USE, INCURRED BY EITHER PARTY OR
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     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.
*****************************************************************************
  
	medrawp.c -- DDXIE prototype export drawable plane element
  
	Robert NC Shelley && Larry Hare -- AGE Logic, Inc. June, 1993
  
*****************************************************************************/

#define _XIEC_MEDRAWP
#define _XIEC_EDRAWP

/*
 *  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>
#include <scrnintstr.h>
#include <pixmapstr.h>
#include <gcstruct.h>
/*
 *  Server XIE Includes
 */
#include <error.h>
#include <macro.h>
#include <element.h>
#include <texstr.h>
#include <xiemd.h>

extern Bool	DrawableAndGC();

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

/*
 *  routines used internal to this module
 */
static int CreateEDrawP();
static int InitializeEDrawP();
static int ActivateEDrawP(), ActivateEDrawPTrans();
static int ResetEDrawP();
static int DestroyEDrawP();

/*
 * DDXIE ExportDrawable entry points
 */
static ddElemVecRec EDrawPVec = {
  CreateEDrawP,
  InitializeEDrawP,
  ActivateEDrawP,
  (xieIntProc)NULL,
  ResetEDrawP,
  DestroyEDrawP
  };

typedef struct _medrawp {
  BytePixel *buf;
} meDrawPRec, *meDrawPPtr;


/*------------------------------------------------------------------------
------------------- see if we can handle this element --------------------
------------------------------------------------------------------------*/
int miAnalyzeEDrawP(flo,ped)
     floDefPtr flo;
     peDefPtr  ped;
{
  /* for now just stash our entry point vector in the peDef */
  ped->ddVec = EDrawPVec;

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

/*------------------------------------------------------------------------
---------------------------- create peTex . . . --------------------------
------------------------------------------------------------------------*/
static int CreateEDrawP(flo,ped)
     floDefPtr flo;
     peDefPtr  ped;
{
  /* attach an execution context to the photo element definition */
  return MakePETex(flo, ped, sizeof(meDrawPRec), NO_SYNC, NO_SYNC);
}                               /* end CreateEDrawP */

/*------------------------------------------------------------------------
---------------------------- initialize peTex . . . ----------------------
------------------------------------------------------------------------*/
static int InitializeEDrawP(flo,ped)
     floDefPtr flo;
     peDefPtr  ped;
{
  xieFloExportDrawablePlane *raw = (xieFloExportDrawablePlane *) ped->elemRaw;
  eDrawPDefPtr	dix = (eDrawPDefPtr) ped->elemPvt;

  if (!DrawableAndGC(flo,ped,raw->drawable,raw->gc,&dix->pDraw,&dix->pGC))
    return FALSE;

  if (dix->pGC->fillStyle == FillStippled)
    	ped->ddVec.activate = ActivateEDrawPTrans;
  else		/* normal case: FillSolid || FillTiled || FillOpaqueStippled */
    	ped->ddVec.activate = ActivateEDrawP;

#if (BITMAP_BIT_ORDER != IMAGE_BYTE_ORDER)
  {
  meDrawPPtr ddx = (meDrawPPtr) ped->peTex->private;
  if(!(ddx->buf = ((BytePixel*)XieMalloc(max(ped->outFlo.format[0].pitch+7>>3,
					     flo->floTex->stripSize)))))
    AllocError(flo,ped, return(FALSE));
  }
#endif

  return InitReceptors(flo,ped,NO_DATAMAP,1);
}                               /* end InitializeEDrawP */


/*------------------------------------------------------------------------
----------------------------- crank some data ----------------------------
------------------------------------------------------------------------*/
static int ActivateEDrawP(flo,ped,pet)
     floDefPtr flo;
     peDefPtr  ped;
     peTexPtr  pet;
{
  xieFloExportDrawablePlane *raw = (xieFloExportDrawablePlane *) ped->elemRaw;
  eDrawPDefPtr	 dix = (eDrawPDefPtr) ped->elemPvt;
  bandPtr	 bnd = &pet->receptor[SRCtag].band[0];
  BytePixel	*src = (BytePixel*)GetCurrentSrc(flo,pet,bnd);
  CARD32    pixtype, depth;

  if(src) {
    if(!DrawableAndGC(flo,ped,raw->drawable,raw->gc,&dix->pDraw,&dix->pGC))
      return FALSE;
    pixtype = (dix->pDraw->type == DRAWABLE_PIXMAP) ? XYPixmap : XYBitmap;
    depth   = (pixtype == XYBitmap) ? 1 : dix->pDraw->depth;

    do {
#if (BITMAP_BIT_ORDER != IMAGE_BYTE_ORDER)
      {
	meDrawPPtr ddx = (meDrawPPtr) pet->private;
	BytePixel *op, *dst;
	int   nb = bnd->pitch * bnd->strip->length;
	dst = op = AlterSrc(flo,pet,bnd->strip) ? src : ddx->buf;
	
	while (nb--)
	  *op++ = _ByteReverseTable[*src++];
	src = dst;
      }
#endif
      (*dix->pGC->ops->PutImage)(dix->pDraw,		  /* drawable	 */
				 dix->pGC,		  /* gc		 */
				 depth,			  /* depth	 */
				 raw->dstX,		  /* drawable-x	 */
				 raw->dstY+bnd->minLocal, /* drawable-y	 */
				 bnd->format->width,	  /* width	 */
				 bnd->strip->length,	  /* height	 */
				 bnd->strip->bitOff,	  /* padding? 	 */
				 pixtype,		  /* data format */
				 (char*)src		  /* data buffer */
				 );
    }
    while(src = (BytePixel*)GetSrc(flo,pet,bnd,bnd->maxLocal,KEEP));

    /* make sure the scheduler knows how much src we used */
    FreeData(flo,pet,bnd,bnd->current);
  }
  return(TRUE);
}                               /* end ActivateEDrawP */

static int ActivateEDrawPTrans(flo,ped,pet)
     floDefPtr flo;
     peDefPtr  ped;
     peTexPtr  pet;
{
  xieFloExportDrawablePlane *raw = (xieFloExportDrawablePlane *) ped->elemRaw;
  eDrawPDefPtr	dix = (eDrawPDefPtr) ped->elemPvt;
  bandPtr	bnd = &pet->receptor[SRCtag].band[0];
  DrawablePtr	draw;
  GCPtr		gc, scratch;
  PixmapPtr	bitmap;
  BytePixel	*src;
  int		oldstyle, newstyle = FillSolid;
  XID		gcvals[3];
  
  src = (BytePixel*)GetSrc(flo,pet,bnd,bnd->minGlobal,FALSE);
  if(src) {
    if (!DrawableAndGC(flo,ped,raw->drawable,raw->gc,&dix->pDraw,&dix->pGC))
      return FALSE;

    draw = dix->pDraw;
    gc   = dix->pGC;

    /*
    ** We use PushPixels with a solid fill to move the one bits onto the
    ** screen. Alternatives include:
    **	a) treat the bitmap as a stipple, set it up in a GC, and do a
    **     simple FillRect with FillStippled.  This has all the same
    **	   problems, plus some more.  Notably its more difficult to
    **	   use ChangeGC to transiently save/restore stipples, and to
    **	   compute the stipple offsets.
    **  b) another alternative is to change the incoming bitonal 
    **	   image to run length and do a FillSpans.  This also requires
    **	   either a scratch GC or transiently using the incoming GC.
    **	   It saves the extra bitmap creation and PutImage, but might
    ** 	   become grotesque when a dithered image comes rolling thru.
    */

    /*
    ** Core X does not seem to provide an official interface to create
    ** a pixmap header, or even to replace the data pointer.  We can't
    ** simply memcpy our data to it either, it might be on a separate
    ** cpu/memory system, or even upside down.  So we just use PutImage
    ** to prepare our data. Sigh.  On most cpu's, just explicitly
    ** create a pixmap header yourself and call PushPixels directly.
    ** Another optimization would be to use more lines at once. One 
    ** model for all this is miglblt.c
    **
    ** Since we expect people may want to redo this routine, we have
    ** left the pixmap and GC games local to this function rather than
    ** spreading stuff out into private structures and initialize
    ** and destroy routines.  For instance, the bitmap and scratchGC
    ** could be allocated once for the entire flow.
    **
    ** For now we do 64 lines of bits at a time.  We might come up
    ** with a better estimate based on actual scanline length. We 
    ** need a function to call though to make this unkludgey. Using
    ** NLINES as 64 may be bad if we get a very wide image.
    **
    ** The current performance seems very bad, even doing a large 
    ** number of lines at a time.  Haven't had time to investigate this.
    */

#define NLINES 64

    if (!(scratch =  GetScratchGC(1, draw->pScreen)))
	AllocError(flo,ped,return(FALSE));


    if (!(bitmap = (*draw->pScreen->CreatePixmap) (draw->pScreen,
			bnd->format->width, NLINES, 1))) {
	FreeScratchGC(scratch);
	AllocError(flo,ped,return(FALSE));
    }
    gcvals[0] = 1;
    gcvals[1] = 0;
    ChangeGC(scratch, GCForeground|GCBackground, gcvals);

    oldstyle = gc->fillStyle; 
    ChangeGC(gc, GCFillStyle, (XID *)&newstyle);

    do {
	int iy, ny;
#if (BITMAP_BIT_ORDER != IMAGE_BYTE_ORDER)
	{
	  meDrawPPtr ddx = (meDrawPPtr) pet->private;
	  BytePixel *op, *dst;
	  int   nb = bnd->pitch * bnd->strip->length;
	  dst = op = AlterSrc(flo,pet,bnd->strip) ? src : ddx->buf;
	
	  while (nb--)
	    *op++ = _ByteReverseTable[*src++];
	  src = dst;
	}
#endif
	for (iy = 0 ; iy < bnd->strip->length; iy += ny) {
	    ny = bnd->strip->length - iy;
	    if (ny > NLINES)
		ny = NLINES;
	    if ((scratch->serialNumber) != (bitmap->drawable.serialNumber))
		ValidateGC((DrawablePtr)bitmap, scratch);
	    (*scratch->ops->PutImage) (
		(DrawablePtr)bitmap,		/* drawable bitmap */
		scratch,			/* gc		*/
		1,				/* depth	*/
		0,				/* drawable-x	*/
		0,				/* drawable-y	*/
		bnd->format->width,		/* width	*/
		ny,				/* height	*/
		bnd->strip->bitOff,		/* padding? 	*/
		XYPixmap,			/* data format	*/
		(char*)src			/* data buffer	*/
		);
	    if ((gc->serialNumber) != (draw->serialNumber))
		ValidateGC(draw, gc);
	    (*gc->ops->PushPixels) (
		gc,					/* gc		*/
		bitmap,					/* bitmap	*/
		draw,					/* drawable	*/
		bnd->format->width,			/* width	*/
		ny,					/* height	*/
		raw->dstX+(gc->miTranslate?draw->x:0),	/* dst X/Y */
		raw->dstY+(gc->miTranslate?draw->y:0)+bnd->current+iy
		);
	    src += bnd->pitch * ny; /* gack */
	}
    } while(src = (BytePixel*)GetSrc(flo,pet,bnd,bnd->maxLocal,FALSE)) ;

    /* make sure the scheduler knows how much src we used */
    FreeData(flo,pet,bnd,bnd->current);

    ChangeGC(gc, GCFillStyle, (XID *)&oldstyle);
    ValidateGC(draw, gc);

    (*draw->pScreen->DestroyPixmap) (bitmap);
    FreeScratchGC(scratch);
  }

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


/*------------------------------------------------------------------------
------------------------ get rid of run-time stuff -----------------------
------------------------------------------------------------------------*/
static int ResetEDrawP(flo,ped)
     floDefPtr flo;
     peDefPtr  ped;
{
  meDrawPPtr ddx = (meDrawPPtr) ped->peTex->private;

  if(ddx->buf) ddx->buf = (BytePixel*)XieFree(ddx->buf);

  ResetReceptors(ped);
  
  return(TRUE);
}                               /* end ResetEDrawP */


/*------------------------------------------------------------------------
-------------------------- get rid of this element -----------------------
------------------------------------------------------------------------*/
static int DestroyEDrawP(flo,ped)
     floDefPtr flo;
     peDefPtr  ped;
{
  /* get rid of the peTex structure  */
  if(ped->peTex)
    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);
}                               /* end DestroyEDrawP */

/* end module medrawp.c */