R6.6 is the Xorg base-line

1 files changed, 750 insertions, 0 deletions

diff --git a/mfb/mfbline.c b/mfb/mfbline.c
new file mode 100644
index 000000000..70e61e6ed
--- /dev/null
+++ b/mfb/mfbline.c
@@ -0,0 +1,750 @@
+/***********************************************************
+
+Copyright 1987, 1998  The Open Group
+
+Permission to use, copy, modify, distribute, and sell this software and its
+documentation for any purpose is hereby granted without fee, provided that
+the above copyright notice appear in all copies and that both that
+copyright notice and this permission notice appear in supporting
+documentation.
+
+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
+OPEN GROUP 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 Open Group 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 Open Group.
+
+
+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 DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
+ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
+DIGITAL 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.
+
+******************************************************************/
+/* $Xorg: mfbline.c,v 1.4 2001/02/09 02:05:19 xorgcvs Exp $ */
+#include "X.h"
+
+#include "gcstruct.h"
+#include "windowstr.h"
+#include "pixmapstr.h"
+#include "regionstr.h"
+#include "scrnintstr.h"
+#include "mistruct.h"
+
+#include "mfb.h"
+#include "maskbits.h"
+#include "miline.h"
+
+/* single-pixel lines on a color frame buffer
+
+   NON-SLOPED LINES
+   horizontal lines are always drawn left to right; we have to
+move the endpoints right by one after they're swapped.
+   horizontal lines will be confined to a single band of a
+region.  the code finds that band (giving up if the lower
+bound of the band is above the line we're drawing); then it
+finds the first box in that band that contains part of the
+line.  we clip the line to subsequent boxes in that band.
+   vertical lines are always drawn top to bottom (y-increasing.)
+this requires adding one to the y-coordinate of each endpoint
+after swapping.
+
+   SLOPED LINES
+   when clipping a sloped line, we bring the second point inside
+the clipping box, rather than one beyond it, and then add 1 to
+the length of the line before drawing it.  this lets us use
+the same box for finding the outcodes for both endpoints.  since
+the equation for clipping the second endpoint to an edge gives us
+1 beyond the edge, we then have to move the point towards the
+first point by one step on the major axis.
+   eventually, there will be a diagram here to explain what's going
+on.  the method uses Cohen-Sutherland outcodes to determine
+outsideness, and a method similar to Pike's layers for doing the
+actual clipping.
+
+*/
+
+void
+#ifdef POLYSEGMENT
+mfbSegmentSS (pDrawable, pGC, nseg, pSeg)
+    DrawablePtr	pDrawable;
+    GCPtr	pGC;
+    int		nseg;
+    register xSegment	*pSeg;
+#else
+mfbLineSS (pDrawable, pGC, mode, npt, pptInit)
+    DrawablePtr pDrawable;
+    GCPtr	pGC;
+    int		mode;		/* Origin or Previous */
+    int		npt;		/* number of points */
+    DDXPointPtr pptInit;
+#endif
+{
+    int nboxInit;
+    register int nbox;
+    BoxPtr pboxInit;
+    register BoxPtr pbox;
+#ifndef POLYSEGMENT
+    register DDXPointPtr ppt;	/* pointer to list of translated points */
+#endif
+
+    unsigned int oc1;		/* outcode of point 1 */
+    unsigned int oc2;		/* outcode of point 2 */
+
+    PixelType *addrlBase;	/* pointer to start of drawable */
+    PixelType *addrl;		/* address of destination pixmap */
+    int nlwidth;		/* width in longwords of destination pixmap */
+    int xorg, yorg;		/* origin of window */
+
+    int adx;		/* abs values of dx and dy */
+    int ady;
+    int signdx;		/* sign of dx and dy */
+    int signdy;
+    int e, e1, e2;		/* bresenham error and increments */
+    int len;			/* length of segment */
+    int axis;			/* major axis */
+    int octant;
+    unsigned int bias = miGetZeroLineBias(pDrawable->pScreen);
+
+				/* a bunch of temporaries */
+    register int y1, y2;
+    register int x1, x2;
+    RegionPtr cclip;
+    int		    alu;
+
+    if (!(pGC->planemask & 1))
+	return;
+
+    cclip = ((mfbPrivGC *)(pGC->devPrivates[mfbGCPrivateIndex].ptr))->pCompositeClip;
+    alu = ((mfbPrivGC *)(pGC->devPrivates[mfbGCPrivateIndex].ptr))->rop;
+    pboxInit = REGION_RECTS(cclip);
+    nboxInit = REGION_NUM_RECTS(cclip);
+
+    mfbGetPixelWidthAndPointer(pDrawable, nlwidth, addrlBase);
+
+    xorg = pDrawable->x;
+    yorg = pDrawable->y;
+#ifdef POLYSEGMENT
+    while (nseg--)
+#else
+    ppt = pptInit;
+    x2 = ppt->x + xorg;
+    y2 = ppt->y + yorg;
+    while(--npt)
+#endif
+    {
+	nbox = nboxInit;
+	pbox = pboxInit;
+
+#ifdef POLYSEGMENT
+	x1 = pSeg->x1 + xorg;
+	y1 = pSeg->y1 + yorg;
+	x2 = pSeg->x2 + xorg;
+	y2 = pSeg->y2 + yorg;
+	pSeg++;
+#else
+	x1 = x2;
+	y1 = y2;
+	++ppt;
+	if (mode == CoordModePrevious)
+	{
+	    xorg = x1;
+	    yorg = y1;
+	}
+	x2 = ppt->x + xorg;
+	y2 = ppt->y + yorg;
+#endif
+
+	if (x1 == x2) /* vertical line */
+	{
+	    /* make the line go top to bottom of screen, keeping
+	       endpoint semantics
+	    */
+	    if (y1 > y2)
+	    {
+		register int tmp;
+
+		tmp = y2;
+		y2 = y1 + 1;
+		y1 = tmp + 1;
+#ifdef POLYSEGMENT
+		if (pGC->capStyle != CapNotLast)
+		    y1--;
+#endif
+	    }
+#ifdef POLYSEGMENT
+	    else if (pGC->capStyle != CapNotLast)
+		y2++;
+#endif
+	    /* get to first band that might contain part of line */
+	    while ((nbox) && (pbox->y2 <= y1))
+	    {
+		pbox++;
+		nbox--;
+	    }
+
+	    if (nbox)
+	    {
+		/* stop when lower edge of box is beyond end of line */
+		while((nbox) && (y2 >= pbox->y1))
+		{
+		    if ((x1 >= pbox->x1) && (x1 < pbox->x2))
+		    {
+			int y1t, y2t;
+			/* this box has part of the line in it */
+			y1t = max(y1, pbox->y1);
+			y2t = min(y2, pbox->y2);
+			if (y1t != y2t)
+			{
+			    mfbVertS (alu,
+				      addrlBase, nlwidth, 
+				      x1, y1t, y2t-y1t);
+			}
+		    }
+		    nbox--;
+		    pbox++;
+		}
+	    }
+#ifndef POLYSEGMENT
+	    y2 = ppt->y + yorg;
+#endif
+	}
+	else if (y1 == y2) /* horizontal line */
+	{
+	    /* force line from left to right, keeping
+	       endpoint semantics
+	    */
+	    if (x1 > x2)
+	    {
+		register int tmp;
+
+		tmp = x2;
+		x2 = x1 + 1;
+		x1 = tmp + 1;
+#ifdef POLYSEGMENT
+		if (pGC->capStyle != CapNotLast)
+		    x1--;
+#endif
+	    }
+#ifdef POLYSEGMENT
+	    else if (pGC->capStyle != CapNotLast)
+		x2++;
+#endif
+
+	    /* find the correct band */
+	    while( (nbox) && (pbox->y2 <= y1))
+	    {
+		pbox++;
+		nbox--;
+	    }
+
+	    /* try to draw the line, if we haven't gone beyond it */
+	    if ((nbox) && (pbox->y1 <= y1))
+	    {
+		int tmp;
+
+		/* when we leave this band, we're done */
+		tmp = pbox->y1;
+		while((nbox) && (pbox->y1 == tmp))
+		{
+		    int	x1t, x2t;
+
+		    if (pbox->x2 <= x1)
+		    {
+			/* skip boxes until one might contain start point */
+			nbox--;
+			pbox++;
+			continue;
+		    }
+
+		    /* stop if left of box is beyond right of line */
+		    if (pbox->x1 >= x2)
+		    {
+			nbox = 0;
+			break;
+		    }
+
+		    x1t = max(x1, pbox->x1);
+		    x2t = min(x2, pbox->x2);
+		    if (x1t != x2t)
+		    {
+			mfbHorzS (alu,
+				  addrlBase, nlwidth, 
+				  x1t, y1, x2t-x1t);
+		    }
+		    nbox--;
+		    pbox++;
+		}
+	    }
+#ifndef POLYSEGMENT
+	    x2 = ppt->x + xorg;
+#endif
+	}
+	else	/* sloped line */
+	{
+	    CalcLineDeltas(x1, y1, x2, y2, adx, ady, signdx, signdy,
+			   1, 1, octant);
+
+	    if (adx > ady)
+	    {
+		axis = X_AXIS;
+		e1 = ady << 1;
+		e2 = e1 - (adx << 1);
+		e = e1 - adx;
+	    }
+	    else
+	    {
+		axis = Y_AXIS;
+		e1 = adx << 1;
+		e2 = e1 - (ady << 1);
+		e = e1 - ady;
+		SetYMajorOctant(octant);
+	    }
+
+	    FIXUP_ERROR(e, octant, bias);
+
+	    /* we have bresenham parameters and two points.
+	       all we have to do now is clip and draw.
+	    */
+
+	    while(nbox--)
+	    {
+		oc1 = 0;
+		oc2 = 0;
+		OUTCODES(oc1, x1, y1, pbox);
+		OUTCODES(oc2, x2, y2, pbox);
+		if ((oc1 | oc2) == 0)
+		{
+		    if (axis == X_AXIS)
+			len = adx;
+		    else
+			len = ady;
+#ifdef POLYSEGMENT
+		    if (pGC->capStyle != CapNotLast)
+			len++;
+#endif
+		    mfbBresS (alu,
+			  addrlBase, nlwidth,
+			  signdx, signdy, axis, x1, y1,
+			  e, e1, e2, len);
+		    break;
+		}
+		else if (oc1 & oc2)
+		{
+		    pbox++;
+		}
+		else
+		{
+		    int new_x1 = x1, new_y1 = y1, new_x2 = x2, new_y2 = y2;
+		    int clip1 = 0, clip2 = 0;
+		    int clipdx, clipdy;
+		    int err;
+		    
+		    if (miZeroClipLine(pbox->x1, pbox->y1, pbox->x2-1,
+				       pbox->y2-1,
+				       &new_x1, &new_y1, &new_x2, &new_y2,
+				       adx, ady, &clip1, &clip2,
+				       octant, bias, oc1, oc2) == -1)
+		    {
+			pbox++;
+			continue;
+		    }
+
+		    if (axis == X_AXIS)
+			len = abs(new_x2 - new_x1);
+		    else
+			len = abs(new_y2 - new_y1);
+#ifdef POLYSEGMENT
+		    if (clip2 != 0 || pGC->capStyle != CapNotLast)
+			len++;
+#else
+		    len += (clip2 != 0);
+#endif
+		    if (len)
+		    {
+			/* unwind bresenham error term to first point */
+			if (clip1)
+			{
+			    clipdx = abs(new_x1 - x1);
+			    clipdy = abs(new_y1 - y1);
+			    if (axis == X_AXIS)
+				err = e+((clipdy*e2) + ((clipdx-clipdy)*e1));
+			    else
+				err = e+((clipdx*e2) + ((clipdy-clipdx)*e1));
+			}
+			else
+			    err = e;
+			mfbBresS   
+			    (alu,
+			     addrlBase, nlwidth,
+			     signdx, signdy, axis, new_x1, new_y1,
+			     err, e1, e2, len);
+		    }
+		    pbox++;
+		}
+	    } /* while (nbox--) */
+	} /* sloped line */
+    } /* while (nline--) */
+
+#ifndef POLYSEGMENT
+
+    /* paint the last point if the end style isn't CapNotLast.
+       (Assume that a projecting, butt, or round cap that is one
+        pixel wide is the same as the single pixel of the endpoint.)
+    */
+
+    if ((pGC->capStyle != CapNotLast) &&
+	((ppt->x + xorg != pptInit->x + pDrawable->x) ||
+	 (ppt->y + yorg != pptInit->y + pDrawable->y) ||
+	 (ppt == pptInit + 1)))
+    {
+	PixelType _mask;
+
+	if (alu == RROP_BLACK)
+		_mask = rmask[x2 & PIM];
+	else
+		_mask = mask[x2 & PIM];
+
+	nbox = nboxInit;
+	pbox = pboxInit;
+	while (nbox--)
+	{
+	    if ((x2 >= pbox->x1) &&
+		(y2 >= pbox->y1) &&
+		(x2 <  pbox->x2) &&
+		(y2 <  pbox->y2))
+	    {
+		addrl = mfbScanline(addrlBase, x2, y2, nlwidth);
+		switch(alu)
+		{
+		    case RROP_BLACK:
+		        *addrl &= _mask;
+			break;
+		    case RROP_WHITE:
+		        *addrl |= _mask;
+			break;
+		    case RROP_INVERT:
+		        *addrl ^= _mask;
+			break;
+		}
+		break;
+	    }
+	    else
+		pbox++;
+	}
+    }
+#endif
+}
+
+/*
+ * Draw dashed 1-pixel lines.
+ */
+
+void
+#ifdef POLYSEGMENT
+mfbSegmentSD (pDrawable, pGC, nseg, pSeg)
+    DrawablePtr	pDrawable;
+    register GCPtr	pGC;
+    int		nseg;
+    register xSegment	*pSeg;
+#else
+mfbLineSD( pDrawable, pGC, mode, npt, pptInit)
+    DrawablePtr pDrawable;
+    register GCPtr pGC;
+    int mode;		/* Origin or Previous */
+    int npt;		/* number of points */
+    DDXPointPtr pptInit;
+#endif
+{
+    int nboxInit;
+    register int nbox;
+    BoxPtr pboxInit;
+    register BoxPtr pbox;
+#ifndef POLYSEGMENT
+    register DDXPointPtr ppt;	/* pointer to list of translated points */
+#endif
+
+    register unsigned int oc1;	/* outcode of point 1 */
+    register unsigned int oc2;	/* outcode of point 2 */
+
+    PixelType *addrl;		/* address of destination pixmap */
+    int nlwidth;		/* width in longwords of destination pixmap */
+    int xorg, yorg;		/* origin of window */
+
+    int adx;		/* abs values of dx and dy */
+    int ady;
+    int signdx;		/* sign of dx and dy */
+    int signdy;
+    int e, e1, e2;		/* bresenham error and increments */
+    int len;			/* length of segment */
+    int axis;			/* major axis */
+    int octant;
+    unsigned int bias = miGetZeroLineBias(pDrawable->pScreen);
+    int x1, x2, y1, y2;
+    RegionPtr cclip;
+    int		    fgrop, bgrop;
+    unsigned char   *pDash;
+    int		    dashOffset;
+    int		    numInDashList;
+    int		    dashIndex;
+    int		    isDoubleDash;
+    int		    dashIndexTmp, dashOffsetTmp;
+    int		    unclippedlen;
+
+    if (!(pGC->planemask & 1))
+	return;
+
+    cclip = ((mfbPrivGC *)(pGC->devPrivates[mfbGCPrivateIndex].ptr))->pCompositeClip;
+    fgrop = ((mfbPrivGC *)(pGC->devPrivates[mfbGCPrivateIndex].ptr))->rop;
+    pboxInit = REGION_RECTS(cclip);
+    nboxInit = REGION_NUM_RECTS(cclip);
+
+   mfbGetPixelWidthAndPointer(pDrawable, nlwidth, addrl); 
+
+    /* compute initial dash values */
+     
+    pDash = (unsigned char *) pGC->dash;
+    numInDashList = pGC->numInDashList;
+    isDoubleDash = (pGC->lineStyle == LineDoubleDash);
+    dashIndex = 0;
+    dashOffset = 0;
+    miStepDash ((int)pGC->dashOffset, &dashIndex, pDash,
+		numInDashList, &dashOffset);
+
+    if (isDoubleDash)
+	bgrop = mfbReduceRop(pGC->alu, pGC->bgPixel);
+
+    xorg = pDrawable->x;
+    yorg = pDrawable->y;
+#ifdef POLYSEGMENT
+    while (nseg--)
+#else
+    ppt = pptInit;
+    x2 = ppt->x + xorg;
+    y2 = ppt->y + yorg;
+    while(--npt)
+#endif
+    {
+	nbox = nboxInit;
+	pbox = pboxInit;
+
+#ifdef POLYSEGMENT
+	x1 = pSeg->x1 + xorg;
+	y1 = pSeg->y1 + yorg;
+	x2 = pSeg->x2 + xorg;
+	y2 = pSeg->y2 + yorg;
+	pSeg++;
+#else
+	x1 = x2;
+	y1 = y2;
+	++ppt;
+	if (mode == CoordModePrevious)
+	{
+	    xorg = x1;
+	    yorg = y1;
+	}
+	x2 = ppt->x + xorg;
+	y2 = ppt->y + yorg;
+#endif
+
+	CalcLineDeltas(x1, y1, x2, y2, adx, ady, signdx, signdy, 1, 1, octant);
+
+	if (adx > ady)
+	{
+	    axis = X_AXIS;
+	    e1 = ady << 1;
+	    e2 = e1 - (adx << 1);
+	    e = e1 - adx;
+	    unclippedlen = adx;
+	}
+	else
+	{
+	    axis = Y_AXIS;
+	    e1 = adx << 1;
+	    e2 = e1 - (ady << 1);
+	    e = e1 - ady;
+	    unclippedlen = ady;
+	    SetYMajorOctant(octant);
+	}
+
+	FIXUP_ERROR(e, octant, bias);
+
+	/* we have bresenham parameters and two points.
+	   all we have to do now is clip and draw.
+	*/
+
+	while(nbox--)
+	{
+	    oc1 = 0;
+	    oc2 = 0;
+	    OUTCODES(oc1, x1, y1, pbox);
+	    OUTCODES(oc2, x2, y2, pbox);
+	    if ((oc1 | oc2) == 0)
+	    {
+#ifdef POLYSEGMENT
+		if (pGC->capStyle != CapNotLast)
+		    unclippedlen++;
+		dashIndexTmp = dashIndex;
+		dashOffsetTmp = dashOffset;
+		mfbBresD (fgrop, bgrop,
+		      &dashIndexTmp, pDash, numInDashList,
+		      &dashOffsetTmp, isDoubleDash,
+		      addrl, nlwidth,
+		      signdx, signdy, axis, x1, y1,
+		      e, e1, e2, unclippedlen);
+		break;
+#else
+		mfbBresD (fgrop, bgrop,
+		      &dashIndex, pDash, numInDashList,
+		      &dashOffset, isDoubleDash,
+		      addrl, nlwidth,
+		      signdx, signdy, axis, x1, y1,
+		      e, e1, e2, unclippedlen);
+		goto dontStep;
+#endif
+	    }
+	    else if (oc1 & oc2)
+	    {
+		pbox++;
+	    }
+	    else /* have to clip */
+	    {
+		int new_x1 = x1, new_y1 = y1, new_x2 = x2, new_y2 = y2;
+		int clip1 = 0, clip2 = 0;
+		int clipdx, clipdy;
+		int err;
+		
+		if (miZeroClipLine(pbox->x1, pbox->y1, pbox->x2-1, pbox->y2-1,
+				   &new_x1, &new_y1, &new_x2, &new_y2,
+				   adx, ady, &clip1, &clip2,
+				   octant, bias, oc1, oc2) == -1)
+		{
+		    pbox++;
+		    continue;
+		}
+		dashIndexTmp = dashIndex;
+		dashOffsetTmp = dashOffset;
+		if (clip1)
+		{
+		    int dlen;
+		    
+		    if (axis == X_AXIS)
+			dlen = abs(new_x1 - x1);
+		    else
+			dlen = abs(new_y1 - y1);
+		    miStepDash (dlen, &dashIndexTmp, pDash,
+				numInDashList, &dashOffsetTmp);
+		}
+		if (axis == X_AXIS)
+		    len = abs(new_x2 - new_x1);
+		else
+		    len = abs(new_y2 - new_y1);
+#ifdef POLYSEGMENT
+		if (clip2 != 0 || pGC->capStyle != CapNotLast)
+		    len++;
+#else
+		len += (clip2 != 0);
+#endif
+		if (len)
+		{
+		    /* unwind bresenham error term to first point */
+		    if (clip1)
+		    {
+			clipdx = abs(new_x1 - x1);
+			clipdy = abs(new_y1 - y1);
+			if (axis == X_AXIS)
+			    err = e+((clipdy*e2) + ((clipdx-clipdy)*e1));
+			else
+			    err = e+((clipdx*e2) + ((clipdy-clipdx)*e1));
+		    }
+		    else
+			err = e;
+		    mfbBresD (fgrop, bgrop,
+			      &dashIndexTmp, pDash, numInDashList,
+			      &dashOffsetTmp, isDoubleDash,
+			      addrl, nlwidth,
+			      signdx, signdy, axis, new_x1, new_y1,
+			      err, e1, e2, len);
+		}
+		pbox++;
+	    }
+	} /* while (nbox--) */
+#ifndef POLYSEGMENT
+	/*
+	 * walk the dash list around to the next line
+	 */
+	miStepDash (unclippedlen, &dashIndex, pDash,
+		    numInDashList, &dashOffset);
+dontStep:	;
+#endif
+    } /* while (nline--) */
+
+#ifndef POLYSEGMENT
+    /* paint the last point if the end style isn't CapNotLast.
+       (Assume that a projecting, butt, or round cap that is one
+        pixel wide is the same as the single pixel of the endpoint.)
+    */
+
+    if ((pGC->capStyle != CapNotLast) &&
+        ((dashIndex & 1) == 0 || isDoubleDash) &&
+	((ppt->x + xorg != pptInit->x + pDrawable->x) ||
+	 (ppt->y + yorg != pptInit->y + pDrawable->y) ||
+	 (ppt == pptInit + 1)))
+    {
+	nbox = nboxInit;
+	pbox = pboxInit;
+	while (nbox--)
+	{
+	    if ((x2 >= pbox->x1) &&
+		(y2 >= pbox->y1) &&
+		(x2 <  pbox->x2) &&
+		(y2 <  pbox->y2))
+	    {
+		unsigned long _mask;
+		int rop;
+
+		rop = fgrop;
+		if (dashIndex & 1)
+		    rop = bgrop;
+		if (rop == RROP_BLACK)
+		    _mask = rmask[x2 & PIM];
+		else
+		    _mask = mask[x2 & PIM];
+		addrl = mfbScanline(addrl, x2, y2, nlwidth);
+		if (rop == RROP_BLACK)
+		    *addrl &= _mask;
+		else if (rop == RROP_WHITE)
+		    *addrl |= _mask;
+		else
+		    *addrl ^= _mask;
+		break;
+	    }
+	    else
+		pbox++;
+	}
+    }
+#endif
+}