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prelim fix-11 merge

/* $XConsortium: gc.c,v 1.1 95/01/26 15:29:18 kaleb Exp $ */
/* $XFree86: xc/programs/Xserver/hw/xfree86/accel/ibm8514/gc.c,v 3.1 1994/09/07 15:48:26 dawes Exp $ */
/*

Copyright (c) 1987  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.
IN NO EVENT SHALL THE X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR
OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
OTHER DEALINGS IN THE SOFTWARE.

Except as contained in this notice, the name of the X Consortium shall
not be used in advertising or otherwise to promote the sale, use or
other dealings in this Software without prior written authorization
from the X Consortium.


Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts,

                        All Rights Reserved

Permission to use, copy, modify, and distribute this software and its 
documentation for any purpose and without fee is hereby granted, 
provided that the above copyright notice appear in all copies and that
both that copyright notice and this permission notice appear in 
supporting documentation, and that the name of Digital not be
used in advertising or publicity pertaining to distribution of the
software without specific, written prior permission.  

DIGITAL AND KEVIN E. MARTIN DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS,
IN NO EVENT SHALL DIGITAL OR KEVIN E. MARTIN BE LIABLE FOR ANY SPECIAL,
INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
PERFORMANCE OF THIS SOFTWARE.

Modified for the 8514/A by Kevin E. Martin (martin@cs.unc.edu)

*/


#include "X.h"
#include "Xmd.h"
#include "Xproto.h"
#include "cfb.h"
#include "fontstruct.h"
#include "dixfontstr.h"
#include "gcstruct.h"
#include "windowstr.h"
#include "pixmapstr.h"
#include "scrnintstr.h"
#include "region.h"

#include "mistruct.h"
#include "mibstore.h"

#include "cfbmskbits.h"
#include "cfb8bit.h"

#include "xf86bcache.h"
#include "xf86fcache.h"
#include "xf86text.h"
#include "ibm8514.h"

static void cfbChangeGC(), cfbCopyGC(), cfbDestroyGC();
static void cfbChangeClip(), cfbDestroyClip(), cfbCopyClip();
static void cfbDestroyOps(), ibm8514ValidateGC();

static GCFuncs cfbFuncs = {
    ibm8514ValidateGC,
    cfbChangeGC,
    cfbCopyGC,
    cfbDestroyGC,
    cfbChangeClip,
    cfbDestroyClip,
    cfbCopyClip,
};

static GCOps	ibm8514Ops = {
    ibm8514SolidFSpans,
    ibm8514SetSpans,
    cfbPutImage,
    ibm8514CopyArea,
    ibm8514CopyPlane,
    ibm8514PolyPoint,
    miWideLine,
    miPolySegment,
    miPolyRectangle,
    miPolyArc,
    miFillPolygon,
    ibm8514PolyFillRect,
    miPolyFillArc,
    xf86PolyText8,
    xf86PolyText16,
    xf86ImageText8,
    xf86ImageText16,
    miImageGlyphBlt,
    miPolyGlyphBlt,
    miPushPixels,
    NULL,
};

static GCOps	cfbTEOps1Rect = {
    cfbSolidSpansCopy,
    cfbSetSpans,
    cfbPutImage,
    ibm8514CopyArea,
    ibm8514CopyPlane,
    cfbPolyPoint,
    cfbLineSS,
    cfbSegmentSS,
    miPolyRectangle,
#if PPW == 4
    cfbZeroPolyArcSS8Copy,
#else
    miZeroPolyArc,
#endif
    cfbFillPoly1RectCopy,
    cfbPolyFillRect,
    cfbPolyFillArcSolidCopy,
    miPolyText8,
    miPolyText16,
    miImageText8,
    miImageText16,
    cfbTEGlyphBlt8,
    cfbPolyGlyphBlt8,
    cfbPushPixels8,
    NULL,
};

static GCOps	cfbTEOps = {
    cfbSolidSpansCopy,
    cfbSetSpans,
    cfbPutImage,
    ibm8514CopyArea,
    ibm8514CopyPlane,
    cfbPolyPoint,
    cfbLineSS,
    cfbSegmentSS,
    miPolyRectangle,
#if PPW == 4
    cfbZeroPolyArcSS8Copy,
#else
    miZeroPolyArc,
#endif
    miFillPolygon,
    cfbPolyFillRect,
    cfbPolyFillArcSolidCopy,
    miPolyText8,
    miPolyText16,
    miImageText8,
    miImageText16,
    cfbTEGlyphBlt8,
    cfbPolyGlyphBlt8,
    cfbPushPixels8,
    NULL,
};

static GCOps	cfbNonTEOps1Rect = {
    cfbSolidSpansCopy,
    cfbSetSpans,
    cfbPutImage,
    ibm8514CopyArea,
    ibm8514CopyPlane,
    cfbPolyPoint,
    cfbLineSS,
    cfbSegmentSS,
    miPolyRectangle,
#if PPW == 4
    cfbZeroPolyArcSS8Copy,
#else
    miZeroPolyArc,
#endif
    cfbFillPoly1RectCopy,
    cfbPolyFillRect,
    cfbPolyFillArcSolidCopy,
    miPolyText8,
    miPolyText16,
    miImageText8,
    miImageText16,
    cfbImageGlyphBlt8,
    cfbPolyGlyphBlt8,
    cfbPushPixels8,
    NULL,
};

static GCOps	cfbNonTEOps = {
    cfbSolidSpansCopy,
    cfbSetSpans,
    cfbPutImage,
    ibm8514CopyArea,
    ibm8514CopyPlane,
    cfbPolyPoint,
    cfbLineSS,
    cfbSegmentSS,
    miPolyRectangle,
#if PPW == 4
    cfbZeroPolyArcSS8Copy,
#else
    miZeroPolyArc,
#endif
    miFillPolygon,
    cfbPolyFillRect,
    cfbPolyFillArcSolidCopy,
    miPolyText8,
    miPolyText16,
    miImageText8,
    miImageText16,
    cfbImageGlyphBlt8,
    cfbPolyGlyphBlt8,
    cfbPushPixels8,
    NULL,
};

static GCOps *
matchCommon (pGC, devPriv)
    GCPtr	    pGC;
    cfbPrivGCPtr    devPriv;
{
    if (pGC->lineWidth != 0)
	return 0;
    if (pGC->lineStyle != LineSolid)
	return 0;
    if (pGC->fillStyle != FillSolid)
	return 0;
    if (devPriv->rop != GXcopy)
	return 0;
    if (pGC->font &&
	FONTMAXBOUNDS(pGC->font,rightSideBearing) -
        FONTMINBOUNDS(pGC->font,leftSideBearing) <= 32 &&
	FONTMINBOUNDS(pGC->font,characterWidth) >= 0)
    {
	if (TERMINALFONT(pGC->font)
#if PPW == 4
	    && FONTMAXBOUNDS(pGC->font,characterWidth) >= 4
#endif
	)
	    if (devPriv->oneRect)
		return &cfbTEOps1Rect;
	    else
		return &cfbTEOps;
	else
	    if (devPriv->oneRect)
		return &cfbNonTEOps1Rect;
	    else
		return &cfbNonTEOps;
    }
    return 0;
}

Bool
ibm8514CreateGC(pGC)
    register GCPtr pGC;
{
    cfbPrivGC  *pPriv;

    switch (pGC->depth) {
    case 1:
	return (mfbCreateGC(pGC));
    case PSZ:
	break;
    default:
	ErrorF("cfbCreateGC: unsupported depth: %d\n", pGC->depth);
	return FALSE;
    }
    pGC->clientClip = NULL;
    pGC->clientClipType = CT_NONE;

    /*
     * some of the output primitives aren't really necessary, since they
     * will be filled in ValidateGC because of dix/CreateGC() setting all
     * the change bits.  Others are necessary because although they depend
     * on being a color frame buffer, they don't change 
     */

    pGC->ops = &cfbNonTEOps;
    pGC->funcs = &cfbFuncs;

    /* cfb wants to translate before scan conversion */
    pGC->miTranslate = 1;

    pPriv = (cfbPrivGC *)(pGC->devPrivates[cfbGCPrivateIndex].ptr);
    pPriv->rop = pGC->alu;
    pPriv->oneRect = FALSE;
    pPriv->fExpose = TRUE;
    pPriv->freeCompClip = FALSE;
    pPriv->pRotatedPixmap = (PixmapPtr) NULL;
    return TRUE;
}

/*ARGSUSED*/
static void
cfbChangeGC(pGC, mask)
    GC		    *pGC;
    BITS32	    mask;
{
    return;
}

static void
cfbDestroyGC(pGC)
    GC 			*pGC;
{
    cfbPrivGC *pPriv;

    pPriv = (cfbPrivGC *)(pGC->devPrivates[cfbGCPrivateIndex].ptr);
    if (pPriv->pRotatedPixmap)
	cfbDestroyPixmap(pPriv->pRotatedPixmap);
    if (pPriv->freeCompClip)
	(*pGC->pScreen->RegionDestroy)(pPriv->pCompositeClip);
    cfbDestroyOps (pGC->ops);
}

/*
 * create a private op array for a gc
 */

static GCOps *
cfbCreateOps (prototype)
    GCOps	*prototype;
{
    GCOps	*ret;
    extern Bool	Must_have_memory;

    /* XXX */ Must_have_memory = TRUE;
    ret = (GCOps *) xalloc (sizeof(GCOps));
    /* XXX */ Must_have_memory = FALSE;
    if (!ret)
	return 0;
    *ret = *prototype;
    ret->devPrivate.val = 1;
    return ret;
}

static void
cfbDestroyOps (ops)
    GCOps   *ops;
{
    if (ops->devPrivate.val)
	xfree (ops);
}

/* Clipping conventions
	if the drawable is a window
	    CT_REGION ==> pCompositeClip really is the composite
	    CT_other ==> pCompositeClip is the window clip region
	if the drawable is a pixmap
	    CT_REGION ==> pCompositeClip is the translated client region
		clipped to the pixmap boundary
	    CT_other ==> pCompositeClip is the pixmap bounding box
*/

static void
ibm8514ValidateGC(pGC, changes, pDrawable)
    register GCPtr  pGC;
    Mask	    changes;
    DrawablePtr	    pDrawable;
{
    WindowPtr   pWin;
    int         mask;		/* stateChanges */
    int         index;		/* used for stepping through bitfields */
    int		new_rrop;
    int         new_line, new_text, new_fillspans, new_fillarea;
    int		new_rotate;
    int		xrot, yrot;
    /* flags for changing the proc vector */
    cfbPrivGCPtr devPriv;
    int		oneRect;

    new_rotate = pGC->lastWinOrg.x != pDrawable->x ||
		 pGC->lastWinOrg.y != pDrawable->y;

    pGC->lastWinOrg.x = pDrawable->x;
    pGC->lastWinOrg.y = pDrawable->y;
    if (pDrawable->type == DRAWABLE_WINDOW)
    {
	pWin = (WindowPtr) pDrawable;
    }
    else
    {
	pWin = (WindowPtr) NULL;
    }

    devPriv = ((cfbPrivGCPtr) (pGC->devPrivates[cfbGCPrivateIndex].ptr));

    new_rrop = FALSE;
    new_line = FALSE;
    new_text = FALSE;
    new_fillspans = FALSE;
    new_fillarea = FALSE;

    /*
     * if the client clip is different or moved OR the subwindowMode has
     * changed OR the window's clip has changed since the last validation
     * we need to recompute the composite clip 
     */

    if ((changes & (GCClipXOrigin|GCClipYOrigin|GCClipMask|GCSubwindowMode)) ||
	(pDrawable->serialNumber != (pGC->serialNumber & DRAWABLE_SERIAL_BITS))
	)
    {
	ScreenPtr pScreen = pGC->pScreen;

	if (pWin) {
	    RegionPtr   pregWin;
	    Bool        freeTmpClip, freeCompClip;

	    if (pGC->subWindowMode == IncludeInferiors) {
		pregWin = NotClippedByChildren(pWin);
		freeTmpClip = TRUE;
	    }
	    else {
		pregWin = &pWin->clipList;
		freeTmpClip = FALSE;
	    }
	    freeCompClip = devPriv->freeCompClip;

	    /*
	     * if there is no client clip, we can get by with just keeping
	     * the pointer we got, and remembering whether or not should
	     * destroy (or maybe re-use) it later.  this way, we avoid
	     * unnecessary copying of regions.  (this wins especially if
	     * many clients clip by children and have no client clip.) 
	     */
	    if (pGC->clientClipType == CT_NONE) {
		if (freeCompClip)
		    (*pScreen->RegionDestroy) (devPriv->pCompositeClip);
		devPriv->pCompositeClip = pregWin;
		devPriv->freeCompClip = freeTmpClip;
	    }
	    else {
		/*
		 * we need one 'real' region to put into the composite
		 * clip. if pregWin the current composite clip are real,
		 * we can get rid of one. if pregWin is real and the
		 * current composite clip isn't, use pregWin for the
		 * composite clip. if the current composite clip is real
		 * and pregWin isn't, use the current composite clip. if
		 * neither is real, create a new region. 
		 */

		(*pScreen->TranslateRegion)(pGC->clientClip,
					    pDrawable->x + pGC->clipOrg.x,
					    pDrawable->y + pGC->clipOrg.y);
						  
		if (freeCompClip)
		{
		    (*pGC->pScreen->Intersect)(devPriv->pCompositeClip,
					       pregWin, pGC->clientClip);
		    if (freeTmpClip)
			(*pScreen->RegionDestroy)(pregWin);
		}
		else if (freeTmpClip)
		{
		    (*pScreen->Intersect)(pregWin, pregWin, pGC->clientClip);
		    devPriv->pCompositeClip = pregWin;
		}
		else
		{
		    devPriv->pCompositeClip = (*pScreen->RegionCreate)(NullBox,
								       0);
		    (*pScreen->Intersect)(devPriv->pCompositeClip,
					  pregWin, pGC->clientClip);
		}
		devPriv->freeCompClip = TRUE;
		(*pScreen->TranslateRegion)(pGC->clientClip,
					    -(pDrawable->x + pGC->clipOrg.x),
					    -(pDrawable->y + pGC->clipOrg.y));
						  
	    }
	}			/* end of composite clip for a window */
	else {
	    BoxRec      pixbounds;

	    /* XXX should we translate by drawable.x/y here ? */
	    pixbounds.x1 = 0;
	    pixbounds.y1 = 0;
	    pixbounds.x2 = pDrawable->width;
	    pixbounds.y2 = pDrawable->height;

	    if (devPriv->freeCompClip)
		(*pScreen->RegionReset)(devPriv->pCompositeClip, &pixbounds);
	    else {
		devPriv->freeCompClip = TRUE;
		devPriv->pCompositeClip = (*pScreen->RegionCreate)(&pixbounds,
								   1);
	    }

	    if (pGC->clientClipType == CT_REGION)
	    {
		(*pScreen->TranslateRegion)(devPriv->pCompositeClip,
					    -pGC->clipOrg.x, -pGC->clipOrg.y);
		(*pScreen->Intersect)(devPriv->pCompositeClip,
				      devPriv->pCompositeClip,
				      pGC->clientClip);
		(*pScreen->TranslateRegion)(devPriv->pCompositeClip,
					    pGC->clipOrg.x, pGC->clipOrg.y);
	    }
	}			/* end of composute clip for pixmap */
	oneRect = REGION_NUM_RECTS(devPriv->pCompositeClip) == 1;
	if (oneRect != devPriv->oneRect)
	    new_line = TRUE;
	devPriv->oneRect = oneRect;
    }

    mask = changes;
    while (mask) {
	index = lowbit (mask);
	mask &= ~index;

	/*
	 * this switch acculmulates a list of which procedures might have
	 * to change due to changes in the GC.  in some cases (e.g.
	 * changing one 16 bit tile for another) we might not really need
	 * a change, but the code is being paranoid. this sort of batching
	 * wins if, for example, the alu and the font have been changed,
	 * or any other pair of items that both change the same thing. 
	 */
	switch (index) {
	case GCFunction:
	case GCForeground:
	    new_rrop = TRUE;
	    break;
	case GCPlaneMask:
	    new_rrop = TRUE;
	    new_text = TRUE;
	    break;
	case GCBackground:
	    break;
	case GCLineStyle:
	case GCLineWidth:
	    new_line = TRUE;
	    break;
	case GCJoinStyle:
	case GCCapStyle:
	    break;
	case GCFillStyle:
	    new_text = TRUE;
	    new_fillspans = TRUE;
	    new_line = TRUE;
	    new_fillarea = TRUE;
	    break;
	case GCFillRule:
	    break;
	case GCTile:
	    new_fillspans = TRUE;
	    new_fillarea = TRUE;
	    break;

	case GCStipple:
	    if (pGC->stipple)
	    {
		int width = pGC->stipple->drawable.width;
		PixmapPtr nstipple;

		if ((width <= 32) && !(width & (width - 1)) &&
		    (nstipple = cfbCopyPixmap(pGC->stipple)))
		{
		    cfbPadPixmap(nstipple);
		    cfbDestroyPixmap(pGC->stipple);
		    pGC->stipple = nstipple;
		}
	    }
	    new_fillspans = TRUE;
	    new_fillarea = TRUE;
	    break;

	case GCTileStipXOrigin:
	    new_rotate = TRUE;
	    break;

	case GCTileStipYOrigin:
	    new_rotate = TRUE;
	    break;

	case GCFont:
	    new_text = TRUE;
	    break;
	case GCSubwindowMode:
	    break;
	case GCGraphicsExposures:
	    break;
	case GCClipXOrigin:
	    break;
	case GCClipYOrigin:
	    break;
	case GCClipMask:
	    break;
	case GCDashOffset:
	    break;
	case GCDashList:
	    break;
	case GCArcMode:
	    break;
	default:
	    break;
	}
    }

    /*
     * If the drawable has changed,  check its depth & ensure suitable
     * entries are in the proc vector. 
     */
    if (pDrawable->serialNumber != (pGC->serialNumber & (DRAWABLE_SERIAL_BITS))) {
	new_fillspans = TRUE;	/* deal with FillSpans later */
    }

    if (new_rotate || new_fillspans)
    {
	Bool new_pix = FALSE;

	xrot = pGC->patOrg.x + pDrawable->x;
	yrot = pGC->patOrg.y + pDrawable->y;

	switch (pGC->fillStyle)
	{
	case FillTiled:
	    if (!pGC->tileIsPixel)
	    {
		int width = pGC->tile.pixmap->drawable.width * PSZ;

		if ((width <= 32) && !(width & (width - 1)))
		{
		    cfbCopyRotatePixmap(pGC->tile.pixmap,
					&devPriv->pRotatedPixmap,
					xrot, yrot);
		    new_pix = TRUE;
		}
	    }
	    break;
#if (PPW == 4)
	case FillStippled:
	case FillOpaqueStippled:
	    {
		int width = pGC->stipple->drawable.width;

		if ((width <= 32) && !(width & (width - 1)))
		{
		    mfbCopyRotatePixmap(pGC->stipple, 
					&devPriv->pRotatedPixmap, xrot, yrot);
		    new_pix = TRUE;
		}
	    }
	    break;
#endif
	}
	if (!new_pix && devPriv->pRotatedPixmap)
	{
	    cfbDestroyPixmap(devPriv->pRotatedPixmap);
	    devPriv->pRotatedPixmap = (PixmapPtr) NULL;
	}
    }

    if (new_rrop)
    {
	int old_rrop;

	old_rrop = devPriv->rop;
	devPriv->rop = cfbReduceRasterOp (pGC->alu, pGC->fgPixel,
					   pGC->planemask,
					   &devPriv->and, &devPriv->xor);
	if (old_rrop == devPriv->rop)
	    new_rrop = FALSE;
	else
	{
#if PPW ==  4
	    new_line = TRUE;
	    new_text = TRUE;
#endif
	    new_fillspans = TRUE;
	    new_fillarea = TRUE;
	}
    }

    if (pWin && pGC->ops->devPrivate.val != 2)
    {
	if (pGC->ops->devPrivate.val == 1)
	    cfbDestroyOps (pGC->ops);

	pGC->ops = cfbCreateOps (&ibm8514Ops);
	pGC->ops->devPrivate.val = 2;

	/* Make sure that everything is properly initialized the first time through */
	new_rrop = new_line = new_text = new_fillspans = new_fillarea = TRUE;
    }
    else if (!pWin && (new_rrop || new_fillspans || new_text || new_fillarea || new_line))
    {
	GCOps	*newops;

	if (newops = matchCommon (pGC, devPriv))
 	{
	    if (pGC->ops->devPrivate.val)
		cfbDestroyOps (pGC->ops);
	    pGC->ops = newops;
	    new_rrop = new_line = new_fillspans = new_text = new_fillarea = 0;
	}
 	else
 	{
	    if (!pGC->ops->devPrivate.val)
	    {
		pGC->ops = cfbCreateOps (pGC->ops);
		pGC->ops->devPrivate.val = 1;
	    }
	    else if (pGC->ops->devPrivate.val != 1)
	    {
		cfbDestroyOps (pGC->ops);
		pGC->ops = cfbCreateOps (&cfbNonTEOps);
		pGC->ops->devPrivate.val = 1;
		new_rrop = new_line = new_text = new_fillspans = new_fillarea = TRUE;
	    }
	}
    }

    /* deal with the changes we've collected */
    if (new_line)
    {
      if (pWin) {
	if (pGC->lineWidth == 0)
	    pGC->ops->PolyArc = miZeroPolyArc;
	else
	    pGC->ops->PolyArc = miPolyArc;
	pGC->ops->PolySegment = miPolySegment;
	switch (pGC->lineStyle)
	{
	case LineSolid:
	    if(pGC->lineWidth == 0)
	    {
		if (pGC->fillStyle == FillSolid)
		{
		  pGC->ops->Polylines = ibm8514Line;
		  pGC->ops->PolySegment = ibm8514Segment;
		}
 		else
		    pGC->ops->Polylines = miZeroLine;
	    }
	    else
		pGC->ops->Polylines = miWideLine;
	    break;
	case LineOnOffDash:
	    pGC->ops->Polylines = miWideDash;
            if ((pGC->lineWidth == 0) && (pGC->fillStyle == FillSolid))
            {
                pGC->ops->Polylines = ibm8514DashLine;
		pGC->ops->PolySegment = ibm8514DashSegment;
	    }
	    break;
	case LineDoubleDash:
	    pGC->ops->Polylines = miWideDash;
            if ((pGC->lineWidth == 0) && (pGC->fillStyle == FillSolid))
            {
                pGC->ops->Polylines = ibm8514DoubleDashLine;
		pGC->ops->PolySegment = ibm8514DoubleDashSegment;
	    }
	    break;
	}
      } else {
	pGC->ops->FillPolygon = miFillPolygon;
	if (devPriv->oneRect && pGC->fillStyle == FillSolid)
	{
	    switch (devPriv->rop) {
	    case GXcopy:
		pGC->ops->FillPolygon = cfbFillPoly1RectCopy;
		break;
	    default:
		pGC->ops->FillPolygon = cfbFillPoly1RectGeneral;
		break;
	    }
	}
	if (pGC->lineWidth == 0)
	{
#if PPW == 4
	    if ((pGC->lineStyle == LineSolid) && (pGC->fillStyle == FillSolid))
	    {
		switch (devPriv->rop)
		{
		case GXxor:
		    pGC->ops->PolyArc = cfbZeroPolyArcSS8Xor;
		    break;
		case GXcopy:
		    pGC->ops->PolyArc = cfbZeroPolyArcSS8Copy;
		    break;
		default:
		    pGC->ops->PolyArc = cfbZeroPolyArcSS8General;
		    break;
		}
	    }
	    else
#endif
		pGC->ops->PolyArc = miZeroPolyArc;
	}
	else
	    pGC->ops->PolyArc = miPolyArc;
	pGC->ops->PolySegment = miPolySegment;
	switch (pGC->lineStyle)
	{
	case LineSolid:
	    if(pGC->lineWidth == 0)
	    {
		if (pGC->fillStyle == FillSolid)
		{
		  pGC->ops->Polylines = cfbLineSS;
		  pGC->ops->PolySegment = cfbSegmentSS;
		}
 		else
		    pGC->ops->Polylines = miZeroLine;
	    }
	    else
		pGC->ops->Polylines = miWideLine;
	    break;
	case LineOnOffDash:
	case LineDoubleDash:
	    if (pGC->lineWidth == 0 && pGC->fillStyle == FillSolid)
	    {
		pGC->ops->Polylines = cfbLineSD;
		pGC->ops->PolySegment = cfbSegmentSD;
	    } else
		pGC->ops->Polylines = miWideDash;
	    break;
	}
      }
    }

    if (new_text && (pGC->font))
    {
      if (pWin) {
	pGC->ops->PolyGlyphBlt = miPolyGlyphBlt;
	pGC->ops->ImageGlyphBlt = miImageGlyphBlt;
      } else {
        if (FONTMAXBOUNDS(pGC->font,rightSideBearing) -
            FONTMINBOUNDS(pGC->font,leftSideBearing) > 32 ||
	    FONTMINBOUNDS(pGC->font,characterWidth) < 0)
        {
            pGC->ops->PolyGlyphBlt = miPolyGlyphBlt;
            pGC->ops->ImageGlyphBlt = miImageGlyphBlt;
        }
        else
        {
#if PPW == 4
	    if (pGC->fillStyle == FillSolid)
	    {
		if (devPriv->rop == GXcopy)
		    pGC->ops->PolyGlyphBlt = cfbPolyGlyphBlt8;
		else
		    pGC->ops->PolyGlyphBlt = cfbPolyGlyphRop8;
	    }
	    else
#endif
		pGC->ops->PolyGlyphBlt = miPolyGlyphBlt;
            /* special case ImageGlyphBlt for terminal emulator fonts */
            if (TERMINALFONT(pGC->font) &&
		(pGC->planemask & PMSK) == PMSK
#if PPW == 4
		&& FONTMAXBOUNDS(pGC->font,characterWidth) >= 4
#endif
		)
	    {
#if PPW == 4
                pGC->ops->ImageGlyphBlt = cfbTEGlyphBlt8;
#else
                pGC->ops->ImageGlyphBlt = cfbTEGlyphBlt;
#endif
	    }
            else
	    {
#if PPW == 4
		pGC->ops->ImageGlyphBlt = cfbImageGlyphBlt8;
#else
                pGC->ops->ImageGlyphBlt = miImageGlyphBlt;
#endif
	    }
        }
      }
    }    


    if (new_fillspans) {
      if (pWin) {
	switch (pGC->fillStyle) {
	case FillSolid:
	    pGC->ops->FillSpans = ibm8514SolidFSpans;
	    break;
	case FillTiled:
	    pGC->ops->FillSpans = ibm8514TiledFSpans;
	    break;
	case FillStippled:
	    pGC->ops->FillSpans = ibm8514StipFSpans;
	    break;
	case FillOpaqueStippled:
	    pGC->ops->FillSpans = ibm8514OStipFSpans;
	    break;
	default:
	    FatalError("ibm8514ValidateGC: illegal fillStyle\n");
	}
      } else {
	switch (pGC->fillStyle) {
	case FillSolid:
	    switch (devPriv->rop) {
	    case GXcopy:
		pGC->ops->FillSpans = cfbSolidSpansCopy;
		break;
	    case GXxor:
		pGC->ops->FillSpans = cfbSolidSpansXor;
		break;
	    default:
		pGC->ops->FillSpans = cfbSolidSpansGeneral;
		break;
	    }
	    break;
	case FillTiled:
	    if (devPriv->pRotatedPixmap)
	    {
		if (pGC->alu == GXcopy && (pGC->planemask & PMSK) == PMSK)
		      pGC->ops->FillSpans = cfbTile32FSCopy;
		else
		      pGC->ops->FillSpans = cfbTile32FSGeneral;
	    }
	    else
		pGC->ops->FillSpans = cfbUnnaturalTileFS;
	    break;
	case FillStippled:
#if PPW == 4
	    if (devPriv->pRotatedPixmap)
		pGC->ops->FillSpans = cfb8Stipple32FS;
	    else
#endif
		pGC->ops->FillSpans = cfbUnnaturalStippleFS;
	    break;
	case FillOpaqueStippled:
#if PPW == 4
	    if (devPriv->pRotatedPixmap)
		pGC->ops->FillSpans = cfb8OpaqueStipple32FS;
	    else
#endif
		pGC->ops->FillSpans = cfbUnnaturalStippleFS;
	    break;
	default:
	    FatalError("ibm8514ValidateGC: illegal fillStyle\n");
	}
      }
    } /* end of new_fillspans */

    if (new_fillarea) {
      if (pWin) {
	pGC->ops->PolyFillRect = ibm8514PolyFillRect;
	pGC->ops->PolyFillArc = miPolyFillArc;
	pGC->ops->PushPixels = miPushPixels;
      } else {
#if PPW != 4
	pGC->ops->PolyFillRect = miPolyFillRect;
	if (pGC->fillStyle == FillSolid || pGC->fillStyle == FillTiled)
	{
	    pGC->ops->PolyFillRect = cfbPolyFillRect;
	}
#endif
#if PPW == 4
	pGC->ops->PushPixels = mfbPushPixels;
	if (pGC->fillStyle == FillSolid && devPriv->rop == GXcopy)
	    pGC->ops->PushPixels = cfbPushPixels8;
#endif
	pGC->ops->PolyFillArc = miPolyFillArc;
	if (pGC->fillStyle == FillSolid)
	{
	    switch (devPriv->rop)
	    {
	    case GXcopy:
		pGC->ops->PolyFillArc = cfbPolyFillArcSolidCopy;
		break;
	    default:
		pGC->ops->PolyFillArc = cfbPolyFillArcSolidGeneral;
		break;
	    }
	}
      }
    }
}

static void
cfbDestroyClip(pGC)
    GCPtr	pGC;
{
    if(pGC->clientClipType == CT_NONE)
	return;
    else if (pGC->clientClipType == CT_PIXMAP)
    {
	cfbDestroyPixmap((PixmapPtr)(pGC->clientClip));
    }
    else
    {
	/* we know we'll never have a list of rectangles, since
	   ChangeClip immediately turns them into a region 
	*/
        (*pGC->pScreen->RegionDestroy)(pGC->clientClip);
    }
    pGC->clientClip = NULL;
    pGC->clientClipType = CT_NONE;
}

static void
cfbChangeClip(pGC, type, pvalue, nrects)
    GCPtr	pGC;
    int		type;
    pointer	pvalue;
    int		nrects;
{
    cfbDestroyClip(pGC);
    if(type == CT_PIXMAP)
    {
	pGC->clientClip = (pointer) (*pGC->pScreen->BitmapToRegion)((PixmapPtr)pvalue);
	(*pGC->pScreen->DestroyPixmap)(pvalue);
    }
    else if (type == CT_REGION) {
	/* stuff the region in the GC */
	pGC->clientClip = pvalue;
    }
    else if (type != CT_NONE)
    {
	pGC->clientClip = (pointer) (*pGC->pScreen->RectsToRegion)(nrects,
						    (xRectangle *)pvalue,
						    type);
	xfree(pvalue);
    }
    pGC->clientClipType = (type != CT_NONE && pGC->clientClip) ? CT_REGION :
								 CT_NONE;
    pGC->stateChanges |= GCClipMask;
}

static void
cfbCopyClip (pgcDst, pgcSrc)
    GCPtr pgcDst, pgcSrc;
{
    RegionPtr prgnNew;

    switch(pgcSrc->clientClipType)
    {
      case CT_PIXMAP:
	((PixmapPtr) pgcSrc->clientClip)->refcnt++;
	/* Fall through !! */
      case CT_NONE:
        cfbChangeClip(pgcDst, (int)pgcSrc->clientClipType, pgcSrc->clientClip,
		      0);
        break;
      case CT_REGION:
        prgnNew = (*pgcSrc->pScreen->RegionCreate)(NULL, 1);
        (*pgcSrc->pScreen->RegionCopy)(prgnNew,
                                       (RegionPtr)(pgcSrc->clientClip));
        cfbChangeClip(pgcDst, CT_REGION, (pointer)prgnNew, 0);
        break;
    }
}

/*ARGSUSED*/
static void
cfbCopyGC (pGCSrc, changes, pGCDst)
    GCPtr	pGCSrc;
    Mask 	changes;
    GCPtr	pGCDst;
{
    return;
}