Synchronised line endinge with release branch

1 files changed, 722 insertions, 722 deletions

diff --git a/xorg-server/fb/fbseg.c b/xorg-server/fb/fbseg.c
index 4885bd87f..5a458fe51 100644
--- a/xorg-server/fb/fbseg.c
+++ b/xorg-server/fb/fbseg.c
@@ -1,722 +1,722 @@
-/*

- * Copyright © 1998 Keith Packard

- *

- * 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, and that the name of Keith Packard not be used in

- * advertising or publicity pertaining to distribution of the software without

- * specific, written prior permission.  Keith Packard makes no

- * representations about the suitability of this software for any purpose.  It

- * is provided "as is" without express or implied warranty.

- *

- * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,

- * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO

- * EVENT SHALL KEITH PACKARD 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.

- */

-

-#ifdef HAVE_DIX_CONFIG_H

-#include <dix-config.h>

-#endif

-

-#include <stdlib.h>

-

-#include "fb.h"

-#include "miline.h"

-

-#define fbBresShiftMask(mask,dir,bpp) ((bpp == FB_STIP_UNIT) ? 0 : \

-					((dir < 0) ? FbStipLeft(mask,bpp) : \

-					 FbStipRight(mask,bpp)))

-

-void

-fbBresSolid (DrawablePtr    pDrawable,

-	     GCPtr	    pGC,

-	     int	    dashOffset,

-	     int	    signdx,

-	     int	    signdy,

-	     int	    axis,

-	     int	    x1,

-	     int	    y1,

-	     int	    e,

-	     int	    e1,

-	     int	    e3,

-	     int	    len)

-{

-    FbStip	*dst;

-    FbStride	dstStride;

-    int		dstBpp;

-    int		dstXoff, dstYoff;

-    FbGCPrivPtr	pPriv = fbGetGCPrivate (pGC);

-    FbStip	and = (FbStip) pPriv->and;

-    FbStip	xor = (FbStip) pPriv->xor;

-    FbStip	mask, mask0;

-    FbStip	bits;

-    

-    fbGetStipDrawable (pDrawable, dst, dstStride, dstBpp, dstXoff, dstYoff);

-    dst += ((y1 + dstYoff) * dstStride);

-    x1 = (x1 + dstXoff) * dstBpp;

-    dst += x1 >> FB_STIP_SHIFT;

-    x1 &= FB_STIP_MASK;

-    mask0 = FbStipMask(0, dstBpp);

-    mask = FbStipRight (mask0, x1);

-    if (signdx < 0)

-	mask0 = FbStipRight (mask0, FB_STIP_UNIT - dstBpp);

-    if (signdy < 0)

-	dstStride = -dstStride;

-    if (axis == X_AXIS)

-    {

-	bits = 0;

-	while (len--)

-	{

-	    bits |= mask;

-	    mask = fbBresShiftMask(mask,signdx,dstBpp);

-	    if (!mask)

-	    {

-		WRITE(dst, FbDoMaskRRop (READ(dst), and, xor, bits));

-		bits = 0;

-		dst += signdx;

-		mask = mask0;

-	    }

-	    e += e1;

-	    if (e >= 0)

-	    {

-		WRITE(dst, FbDoMaskRRop (READ(dst), and, xor, bits));

-		bits = 0;

-		dst += dstStride;

-		e += e3;

-	    }

-	}

-	if (bits)

-	    WRITE(dst, FbDoMaskRRop (READ(dst), and, xor, bits));

-    }

-    else

-    {

-	while (len--)

-	{

-	    WRITE(dst, FbDoMaskRRop (READ(dst), and, xor, mask));

-	    dst += dstStride;

-	    e += e1;

-	    if (e >= 0)

-	    {

-		e += e3;

-		mask = fbBresShiftMask(mask,signdx,dstBpp);

-		if (!mask)

-		{

-		    dst += signdx;

-		    mask = mask0;

-		}

-	    }

-	}

-    }

-

-    fbFinishAccess (pDrawable);

-}

-

-void

-fbBresDash (DrawablePtr	pDrawable,

-	    GCPtr	pGC,

-	    int		dashOffset,

-	    int		signdx,

-	    int		signdy,

-	    int		axis,

-	    int		x1,

-	    int		y1,

-	    int		e,

-	    int		e1,

-	    int		e3,

-	    int		len)

-{

-    FbStip	*dst;

-    FbStride	dstStride;

-    int		dstBpp;

-    int		dstXoff, dstYoff;

-    FbGCPrivPtr	pPriv = fbGetGCPrivate (pGC);

-    FbStip	and = (FbStip) pPriv->and;

-    FbStip	xor = (FbStip) pPriv->xor;

-    FbStip	bgand = (FbStip) pPriv->bgand;

-    FbStip	bgxor = (FbStip) pPriv->bgxor;

-    FbStip	mask, mask0;

-    FbDashDeclare;

-    int		dashlen;

-    Bool	even;

-    Bool	doOdd;

-    

-    fbGetStipDrawable (pDrawable, dst, dstStride, dstBpp, dstXoff, dstYoff);

-    doOdd = pGC->lineStyle == LineDoubleDash;

-

-    FbDashInit (pGC, pPriv, dashOffset, dashlen, even);

-    

-    dst += ((y1 + dstYoff) * dstStride);

-    x1 = (x1 + dstXoff) * dstBpp;

-    dst += x1 >> FB_STIP_SHIFT;

-    x1 &= FB_STIP_MASK;

-    mask0 = FbStipMask(0, dstBpp);

-    mask = FbStipRight (mask0, x1);

-    if (signdx < 0)

-	mask0 = FbStipRight (mask0, FB_STIP_UNIT - dstBpp);

-    if (signdy < 0)

-	dstStride = -dstStride;

-    while (len--)

-    {

-	if (even)

-	    WRITE(dst, FbDoMaskRRop (READ(dst), and, xor, mask));

-	else if (doOdd)

-	    WRITE(dst, FbDoMaskRRop (READ(dst), bgand, bgxor, mask));

-	if (axis == X_AXIS)

-	{

-	    mask = fbBresShiftMask(mask,signdx,dstBpp);

-	    if (!mask)

-	    {

-		dst += signdx;

-		mask = mask0;

-	    }

-	    e += e1;

-	    if (e >= 0)

-	    {

-		dst += dstStride;

-		e += e3;

-	    }

-	}

-	else

-	{

-	    dst += dstStride;

-	    e += e1;

-	    if (e >= 0)

-	    {

-		e += e3;

-		mask = fbBresShiftMask(mask,signdx,dstBpp);

-		if (!mask)

-		{

-		    dst += signdx;

-		    mask = mask0;

-		}

-	    }

-	}

-	FbDashStep (dashlen, even);

-    }

-

-    fbFinishAccess (pDrawable);

-}

-

-void

-fbBresFill (DrawablePtr	pDrawable,

-	    GCPtr	pGC,

-	    int		dashOffset,

-	    int		signdx,

-	    int		signdy,

-	    int		axis,

-	    int		x1,

-	    int		y1,

-	    int		e,

-	    int		e1,

-	    int		e3,

-	    int		len)

-{

-    while (len--)

-    {

-	fbFill (pDrawable, pGC, x1, y1, 1, 1);

-	if (axis == X_AXIS)

-	{

-	    x1 += signdx;

-	    e += e1;

-	    if (e >= 0)

-	    {

-		e += e3;

-		y1 += signdy;

-	    }

-	}

-	else

-	{

-	    y1 += signdy;

-	    e += e1;

-	    if (e >= 0)

-	    {

-		e += e3;

-		x1 += signdx;

-	    }

-	}

-    }

-}

-

-static void

-fbSetFg (DrawablePtr	pDrawable,

-	 GCPtr		pGC,

-	 Pixel		fg)

-{

-    if (fg != pGC->fgPixel)

-    {

-	ChangeGCVal val;

-	val.val = fg;

-	ChangeGC (NullClient, pGC, GCForeground, &val);

-	ValidateGC (pDrawable, pGC);

-    }

-}

-

-void

-fbBresFillDash (DrawablePtr pDrawable,

-		GCPtr	    pGC,

-		int	    dashOffset,

-		int	    signdx,

-		int	    signdy,

-		int	    axis,

-		int	    x1,

-		int	    y1,

-		int	    e,

-		int	    e1,

-		int	    e3,

-		int	    len)

-{

-    FbGCPrivPtr	pPriv = fbGetGCPrivate (pGC);

-    FbDashDeclare;

-    int		dashlen;

-    Bool	even;

-    Bool	doOdd;

-    Bool	doBg;

-    Pixel	fg, bg;

-    

-    fg = pGC->fgPixel;

-    bg = pGC->bgPixel;

-    

-    /* whether to fill the odd dashes */

-    doOdd = pGC->lineStyle == LineDoubleDash;

-    /* whether to switch fg to bg when filling odd dashes */

-    doBg = doOdd && (pGC->fillStyle == FillSolid || 

-		     pGC->fillStyle == FillStippled);

-    

-    /* compute current dash position */

-    FbDashInit (pGC, pPriv, dashOffset, dashlen, even);

-    

-    while (len--)

-    {

-	if (even || doOdd)

-	{

-	    if (doBg)

-	    {

-		if (even)

-		    fbSetFg (pDrawable, pGC, fg);

-		else

-		    fbSetFg (pDrawable, pGC, bg);

-	    }

-	    fbFill (pDrawable, pGC, x1, y1, 1, 1);

-	}

-	if (axis == X_AXIS)

-	{

-	    x1 += signdx;

-	    e += e1;

-	    if (e >= 0)

-	    {

-		e += e3;

-		y1 += signdy;

-	    }

-	}

-	else

-	{

-	    y1 += signdy;

-	    e += e1;

-	    if (e >= 0)

-	    {

-		e += e3;

-		x1 += signdx;

-	    }

-	}

-	FbDashStep (dashlen, even);

-    }

-    if (doBg)

-	fbSetFg (pDrawable, pGC, fg);

-}

-

-static void

-fbBresSolid24RRop (DrawablePtr  pDrawable,

-		   GCPtr	pGC,

-		   int		dashOffset,

-		   int		signdx,

-		   int		signdy,

-		   int		axis,

-		   int		x1,

-		   int		y1,

-		   int		e,

-		   int		e1,

-		   int		e3,

-		   int		len)

-{

-    FbStip	*dst;

-    FbStride	dstStride;

-    int		dstBpp;

-    int		dstXoff, dstYoff;

-    FbGCPrivPtr	pPriv = fbGetGCPrivate (pGC);

-    FbStip	and = pPriv->and;

-    FbStip	xor = pPriv->xor;

-    FbStip	leftMask, rightMask;

-    int		nl;

-    FbStip	*d;

-    int		x;

-    int		rot;

-    FbStip	andT, xorT;

-    

-    fbGetStipDrawable (pDrawable, dst, dstStride, dstBpp, dstXoff, dstYoff);

-    dst += ((y1 + dstYoff) * dstStride);

-    x1 = (x1 + dstXoff) * 24;

-    if (signdy < 0)

-	dstStride = -dstStride;

-    signdx *= 24;

-    while (len--)

-    {

-	d = dst + (x1 >> FB_STIP_SHIFT);

-	x = x1 & FB_STIP_MASK;

-	rot = FbFirst24Rot (x);

-	andT = FbRot24Stip(and,rot);

-	xorT = FbRot24Stip(xor,rot);

-	FbMaskStip (x, 24, leftMask, nl, rightMask);

-	if (leftMask)

-	{

-	    WRITE(d, FbDoMaskRRop (READ(d), andT, xorT, leftMask));

-	    d++;

-	    andT = FbNext24Stip (andT);

-	    xorT = FbNext24Stip (xorT);

-	}

-	if (rightMask)

-	    WRITE(d, FbDoMaskRRop (READ(d), andT, xorT, rightMask));

-	if (axis == X_AXIS)

-	{

-	    x1 += signdx;

-	    e += e1;

-	    if (e >= 0)

-	    {

-		e += e3;

-		dst += dstStride;

-	    }

-	}

-	else

-	{

-	    dst += dstStride;

-	    e += e1;

-	    if (e >= 0)

-	    {

-		e += e3;

-		x1 += signdx;

-	    }

-	}

-    }

-

-    fbFinishAccess (pDrawable);

-}

-

-static void

-fbBresDash24RRop (DrawablePtr	pDrawable,

-		  GCPtr		pGC,

-		  int		dashOffset,

-		  int		signdx,

-		  int		signdy,

-		  int		axis,

-		  int		x1,

-		  int		y1,

-		  int		e,

-		  int		e1,

-		  int		e3,

-		  int		len)

-{

-    FbStip	*dst;

-    FbStride	dstStride;

-    int		dstBpp;

-    int		dstXoff, dstYoff;

-    FbGCPrivPtr	pPriv = fbGetGCPrivate (pGC);

-    FbStip	andT, xorT;

-    FbStip	fgand = pPriv->and;

-    FbStip	fgxor = pPriv->xor;

-    FbStip	bgand = pPriv->bgand;

-    FbStip	bgxor = pPriv->bgxor;

-    FbStip	leftMask, rightMask;

-    int		nl;

-    FbStip	*d;

-    int		x;

-    int		rot;

-    FbDashDeclare;

-    int		dashlen;

-    Bool	even;

-    Bool	doOdd;

-    

-    fbGetStipDrawable (pDrawable, dst, dstStride, dstBpp, dstXoff, dstYoff);

-    doOdd = pGC->lineStyle == LineDoubleDash;

-

-    /* compute current dash position */

-    FbDashInit(pGC, pPriv, dashOffset, dashlen, even);

-    

-    dst += ((y1 + dstYoff) * dstStride);

-    x1 = (x1 + dstXoff) * 24;

-    if (signdy < 0)

-	dstStride = -dstStride;

-    signdx *= 24;

-    while (len--)

-    {

-	if (even || doOdd)

-	{

-	    if (even)

-	    {

-		andT = fgand;

-		xorT = fgxor;

-	    }

-	    else

-	    {

-		andT = bgand;

-		xorT = bgxor;

-	    }

-	    d = dst + (x1 >> FB_STIP_SHIFT);

-	    x = x1 & FB_STIP_MASK;

-	    rot = FbFirst24Rot (x);

-	    andT = FbRot24Stip (andT, rot);

-	    xorT = FbRot24Stip (xorT, rot);

-	    FbMaskStip (x, 24, leftMask, nl, rightMask);

-	    if (leftMask)

-	    {

-		WRITE(d, FbDoMaskRRop (READ(d), andT, xorT, leftMask));

-		d++;

-		andT = FbNext24Stip (andT);

-		xorT = FbNext24Stip (xorT);

-	    }

-	    if (rightMask)

-		WRITE(d, FbDoMaskRRop (READ(d), andT, xorT, rightMask));

-	}

-	if (axis == X_AXIS)

-	{

-	    x1 += signdx;

-	    e += e1;

-	    if (e >= 0)

-	    {

-		e += e3;

-		dst += dstStride;

-	    }

-	}

-	else

-	{

-	    dst += dstStride;

-	    e += e1;

-	    if (e >= 0)

-	    {

-		e += e3;

-		x1 += signdx;

-	    }

-	}

-	FbDashStep (dashlen, even);

-    }

-

-    fbFinishAccess (pDrawable);

-}

-

-/*

- * For drivers that want to bail drawing some lines, this

- * function takes care of selecting the appropriate rasterizer

- * based on the contents of the specified GC.

- */

-

-FbBres *

-fbSelectBres (DrawablePtr   pDrawable,

-	      GCPtr	    pGC)

-{

-    FbGCPrivPtr	pPriv = fbGetGCPrivate(pGC);

-    int		dstBpp = pDrawable->bitsPerPixel;

-    FbBres *	bres;

-    

-    if (pGC->lineStyle == LineSolid)

-    {

-	bres = fbBresFill;

-	if (pGC->fillStyle == FillSolid)

-	{

-	    bres = fbBresSolid;

-	    if (dstBpp == 24)

-		bres = fbBresSolid24RRop;

-	    if (pPriv->and == 0)

-	    {

-		switch (dstBpp) {

-		case 8:	bres = fbBresSolid8; break;

-		case 16: bres = fbBresSolid16; break;

-		case 24: bres = fbBresSolid24; break;

-		case 32: bres = fbBresSolid32; break;

-		}

-	    }

-	}

-    }

-    else

-    {

-	bres = fbBresFillDash;

-	if (pGC->fillStyle == FillSolid)

-	{

-	    bres = fbBresDash;

-	    if (dstBpp == 24)

-		bres = fbBresDash24RRop;

-	    if (pPriv->and == 0 && 

-		(pGC->lineStyle == LineOnOffDash || pPriv->bgand == 0))

-	    {

-		switch (dstBpp) {

-		case 8:	bres = fbBresDash8; break;

-		case 16: bres = fbBresDash16; break;

-		case 24: bres = fbBresDash24; break;

-		case 32: bres = fbBresDash32; break;

-		}

-	    }

-	}

-    }

-    return bres;

-}

-

-void

-fbBres (DrawablePtr	pDrawable,

-	GCPtr		pGC,

-	int		dashOffset,

-	int		signdx,

-	int		signdy,

-	int		axis,

-	int		x1,

-	int		y1,

-	int		e,

-	int		e1,

-	int		e3,

-	int		len)

-{

-    (*fbSelectBres (pDrawable, pGC)) (pDrawable, pGC, dashOffset,

-				      signdx, signdy, axis, x1, y1,

-				      e, e1, e3, len);

-}

-

-void

-fbSegment (DrawablePtr	pDrawable,

-	   GCPtr	pGC,

-	   int		x1,

-	   int		y1,

-	   int		x2,

-	   int		y2,

-	   Bool		drawLast,

-	   int		*dashOffset)

-{

-    FbBres *	bres;

-    RegionPtr	pClip = fbGetCompositeClip(pGC);

-    BoxPtr	pBox;

-    int		nBox;

-    int		adx;		/* abs values of dx and dy */

-    int		ady;

-    int		signdx;		/* sign of dx and dy */

-    int		signdy;

-    int		e, e1, e2, e3;		/* bresenham error and increments */

-    int		len;			/* length of segment */

-    int		axis;			/* major axis */

-    int		octant;

-    int		dashoff;

-    int		doff;

-    unsigned int bias = miGetZeroLineBias(pDrawable->pScreen);

-    unsigned int oc1;	/* outcode of point 1 */

-    unsigned int oc2;	/* outcode of point 2 */

-

-    nBox = RegionNumRects (pClip);

-    pBox = RegionRects (pClip);

-    

-    bres = fbSelectBres (pDrawable, pGC);

-    

-    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;

-	len = adx;

-    }

-    else

-    {

-	axis = Y_AXIS;

-	e1 = adx << 1;

-	e2 = e1 - (ady << 1);

-	e = e1 - ady;

-	SetYMajorOctant(octant);

-	len = ady;

-    }

-

-    FIXUP_ERROR (e, octant, bias);

-    

-    /*

-     * Adjust error terms to compare against zero

-     */

-    e3 = e2 - e1;

-    e = e - e1;

-    

-    /* we have bresenham parameters and two points.

-       all we have to do now is clip and draw.

-    */

-

-    if (drawLast)

-	len++;

-    dashoff = *dashOffset;

-    *dashOffset = dashoff + len;

-    while(nBox--)

-    {

-	oc1 = 0;

-	oc2 = 0;

-	OUTCODES(oc1, x1, y1, pBox);

-	OUTCODES(oc2, x2, y2, pBox);

-	if ((oc1 | oc2) == 0)

-	{

-	    (*bres) (pDrawable, pGC, dashoff,

-		     signdx, signdy, axis, x1, y1,

-		     e, e1, e3, 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);

-	    if (clip2 != 0 || drawLast)

-		len++;

-	    if (len)

-	    {

-		/* unwind bresenham error term to first point */

-		doff = dashoff;

-		err = e;

-		if (clip1)

-		{

-		    clipdx = abs(new_x1 - x1);

-		    clipdy = abs(new_y1 - y1);

-		    if (axis == X_AXIS)

-		    {

-			doff += clipdx;

-			err  += e3 * clipdy + e1 * clipdx;

-		    }

-		    else

-		    {

-			doff += clipdy;

-			err  += e3 * clipdx + e1 * clipdy;

-		    }

-		}

-		(*bres) (pDrawable, pGC, doff,

-			 signdx, signdy, axis, new_x1, new_y1,

-			 err, e1, e3, len);

-	    }

-	    pBox++;

-	}

-    } /* while (nBox--) */

-}

+/*
+ * Copyright © 1998 Keith Packard
+ *
+ * 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, and that the name of Keith Packard not be used in
+ * advertising or publicity pertaining to distribution of the software without
+ * specific, written prior permission.  Keith Packard makes no
+ * representations about the suitability of this software for any purpose.  It
+ * is provided "as is" without express or implied warranty.
+ *
+ * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL KEITH PACKARD 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.
+ */
+
+#ifdef HAVE_DIX_CONFIG_H
+#include <dix-config.h>
+#endif
+
+#include <stdlib.h>
+
+#include "fb.h"
+#include "miline.h"
+
+#define fbBresShiftMask(mask,dir,bpp) ((bpp == FB_STIP_UNIT) ? 0 : \
+					((dir < 0) ? FbStipLeft(mask,bpp) : \
+					 FbStipRight(mask,bpp)))
+
+void
+fbBresSolid (DrawablePtr    pDrawable,
+	     GCPtr	    pGC,
+	     int	    dashOffset,
+	     int	    signdx,
+	     int	    signdy,
+	     int	    axis,
+	     int	    x1,
+	     int	    y1,
+	     int	    e,
+	     int	    e1,
+	     int	    e3,
+	     int	    len)
+{
+    FbStip	*dst;
+    FbStride	dstStride;
+    int		dstBpp;
+    int		dstXoff, dstYoff;
+    FbGCPrivPtr	pPriv = fbGetGCPrivate (pGC);
+    FbStip	and = (FbStip) pPriv->and;
+    FbStip	xor = (FbStip) pPriv->xor;
+    FbStip	mask, mask0;
+    FbStip	bits;
+    
+    fbGetStipDrawable (pDrawable, dst, dstStride, dstBpp, dstXoff, dstYoff);
+    dst += ((y1 + dstYoff) * dstStride);
+    x1 = (x1 + dstXoff) * dstBpp;
+    dst += x1 >> FB_STIP_SHIFT;
+    x1 &= FB_STIP_MASK;
+    mask0 = FbStipMask(0, dstBpp);
+    mask = FbStipRight (mask0, x1);
+    if (signdx < 0)
+	mask0 = FbStipRight (mask0, FB_STIP_UNIT - dstBpp);
+    if (signdy < 0)
+	dstStride = -dstStride;
+    if (axis == X_AXIS)
+    {
+	bits = 0;
+	while (len--)
+	{
+	    bits |= mask;
+	    mask = fbBresShiftMask(mask,signdx,dstBpp);
+	    if (!mask)
+	    {
+		WRITE(dst, FbDoMaskRRop (READ(dst), and, xor, bits));
+		bits = 0;
+		dst += signdx;
+		mask = mask0;
+	    }
+	    e += e1;
+	    if (e >= 0)
+	    {
+		WRITE(dst, FbDoMaskRRop (READ(dst), and, xor, bits));
+		bits = 0;
+		dst += dstStride;
+		e += e3;
+	    }
+	}
+	if (bits)
+	    WRITE(dst, FbDoMaskRRop (READ(dst), and, xor, bits));
+    }
+    else
+    {
+	while (len--)
+	{
+	    WRITE(dst, FbDoMaskRRop (READ(dst), and, xor, mask));
+	    dst += dstStride;
+	    e += e1;
+	    if (e >= 0)
+	    {
+		e += e3;
+		mask = fbBresShiftMask(mask,signdx,dstBpp);
+		if (!mask)
+		{
+		    dst += signdx;
+		    mask = mask0;
+		}
+	    }
+	}
+    }
+
+    fbFinishAccess (pDrawable);
+}
+
+void
+fbBresDash (DrawablePtr	pDrawable,
+	    GCPtr	pGC,
+	    int		dashOffset,
+	    int		signdx,
+	    int		signdy,
+	    int		axis,
+	    int		x1,
+	    int		y1,
+	    int		e,
+	    int		e1,
+	    int		e3,
+	    int		len)
+{
+    FbStip	*dst;
+    FbStride	dstStride;
+    int		dstBpp;
+    int		dstXoff, dstYoff;
+    FbGCPrivPtr	pPriv = fbGetGCPrivate (pGC);
+    FbStip	and = (FbStip) pPriv->and;
+    FbStip	xor = (FbStip) pPriv->xor;
+    FbStip	bgand = (FbStip) pPriv->bgand;
+    FbStip	bgxor = (FbStip) pPriv->bgxor;
+    FbStip	mask, mask0;
+    FbDashDeclare;
+    int		dashlen;
+    Bool	even;
+    Bool	doOdd;
+    
+    fbGetStipDrawable (pDrawable, dst, dstStride, dstBpp, dstXoff, dstYoff);
+    doOdd = pGC->lineStyle == LineDoubleDash;
+
+    FbDashInit (pGC, pPriv, dashOffset, dashlen, even);
+    
+    dst += ((y1 + dstYoff) * dstStride);
+    x1 = (x1 + dstXoff) * dstBpp;
+    dst += x1 >> FB_STIP_SHIFT;
+    x1 &= FB_STIP_MASK;
+    mask0 = FbStipMask(0, dstBpp);
+    mask = FbStipRight (mask0, x1);
+    if (signdx < 0)
+	mask0 = FbStipRight (mask0, FB_STIP_UNIT - dstBpp);
+    if (signdy < 0)
+	dstStride = -dstStride;
+    while (len--)
+    {
+	if (even)
+	    WRITE(dst, FbDoMaskRRop (READ(dst), and, xor, mask));
+	else if (doOdd)
+	    WRITE(dst, FbDoMaskRRop (READ(dst), bgand, bgxor, mask));
+	if (axis == X_AXIS)
+	{
+	    mask = fbBresShiftMask(mask,signdx,dstBpp);
+	    if (!mask)
+	    {
+		dst += signdx;
+		mask = mask0;
+	    }
+	    e += e1;
+	    if (e >= 0)
+	    {
+		dst += dstStride;
+		e += e3;
+	    }
+	}
+	else
+	{
+	    dst += dstStride;
+	    e += e1;
+	    if (e >= 0)
+	    {
+		e += e3;
+		mask = fbBresShiftMask(mask,signdx,dstBpp);
+		if (!mask)
+		{
+		    dst += signdx;
+		    mask = mask0;
+		}
+	    }
+	}
+	FbDashStep (dashlen, even);
+    }
+
+    fbFinishAccess (pDrawable);
+}
+
+void
+fbBresFill (DrawablePtr	pDrawable,
+	    GCPtr	pGC,
+	    int		dashOffset,
+	    int		signdx,
+	    int		signdy,
+	    int		axis,
+	    int		x1,
+	    int		y1,
+	    int		e,
+	    int		e1,
+	    int		e3,
+	    int		len)
+{
+    while (len--)
+    {
+	fbFill (pDrawable, pGC, x1, y1, 1, 1);
+	if (axis == X_AXIS)
+	{
+	    x1 += signdx;
+	    e += e1;
+	    if (e >= 0)
+	    {
+		e += e3;
+		y1 += signdy;
+	    }
+	}
+	else
+	{
+	    y1 += signdy;
+	    e += e1;
+	    if (e >= 0)
+	    {
+		e += e3;
+		x1 += signdx;
+	    }
+	}
+    }
+}
+
+static void
+fbSetFg (DrawablePtr	pDrawable,
+	 GCPtr		pGC,
+	 Pixel		fg)
+{
+    if (fg != pGC->fgPixel)
+    {
+	ChangeGCVal val;
+	val.val = fg;
+	ChangeGC (NullClient, pGC, GCForeground, &val);
+	ValidateGC (pDrawable, pGC);
+    }
+}
+
+void
+fbBresFillDash (DrawablePtr pDrawable,
+		GCPtr	    pGC,
+		int	    dashOffset,
+		int	    signdx,
+		int	    signdy,
+		int	    axis,
+		int	    x1,
+		int	    y1,
+		int	    e,
+		int	    e1,
+		int	    e3,
+		int	    len)
+{
+    FbGCPrivPtr	pPriv = fbGetGCPrivate (pGC);
+    FbDashDeclare;
+    int		dashlen;
+    Bool	even;
+    Bool	doOdd;
+    Bool	doBg;
+    Pixel	fg, bg;
+    
+    fg = pGC->fgPixel;
+    bg = pGC->bgPixel;
+    
+    /* whether to fill the odd dashes */
+    doOdd = pGC->lineStyle == LineDoubleDash;
+    /* whether to switch fg to bg when filling odd dashes */
+    doBg = doOdd && (pGC->fillStyle == FillSolid || 
+		     pGC->fillStyle == FillStippled);
+    
+    /* compute current dash position */
+    FbDashInit (pGC, pPriv, dashOffset, dashlen, even);
+    
+    while (len--)
+    {
+	if (even || doOdd)
+	{
+	    if (doBg)
+	    {
+		if (even)
+		    fbSetFg (pDrawable, pGC, fg);
+		else
+		    fbSetFg (pDrawable, pGC, bg);
+	    }
+	    fbFill (pDrawable, pGC, x1, y1, 1, 1);
+	}
+	if (axis == X_AXIS)
+	{
+	    x1 += signdx;
+	    e += e1;
+	    if (e >= 0)
+	    {
+		e += e3;
+		y1 += signdy;
+	    }
+	}
+	else
+	{
+	    y1 += signdy;
+	    e += e1;
+	    if (e >= 0)
+	    {
+		e += e3;
+		x1 += signdx;
+	    }
+	}
+	FbDashStep (dashlen, even);
+    }
+    if (doBg)
+	fbSetFg (pDrawable, pGC, fg);
+}
+
+static void
+fbBresSolid24RRop (DrawablePtr  pDrawable,
+		   GCPtr	pGC,
+		   int		dashOffset,
+		   int		signdx,
+		   int		signdy,
+		   int		axis,
+		   int		x1,
+		   int		y1,
+		   int		e,
+		   int		e1,
+		   int		e3,
+		   int		len)
+{
+    FbStip	*dst;
+    FbStride	dstStride;
+    int		dstBpp;
+    int		dstXoff, dstYoff;
+    FbGCPrivPtr	pPriv = fbGetGCPrivate (pGC);
+    FbStip	and = pPriv->and;
+    FbStip	xor = pPriv->xor;
+    FbStip	leftMask, rightMask;
+    int		nl;
+    FbStip	*d;
+    int		x;
+    int		rot;
+    FbStip	andT, xorT;
+    
+    fbGetStipDrawable (pDrawable, dst, dstStride, dstBpp, dstXoff, dstYoff);
+    dst += ((y1 + dstYoff) * dstStride);
+    x1 = (x1 + dstXoff) * 24;
+    if (signdy < 0)
+	dstStride = -dstStride;
+    signdx *= 24;
+    while (len--)
+    {
+	d = dst + (x1 >> FB_STIP_SHIFT);
+	x = x1 & FB_STIP_MASK;
+	rot = FbFirst24Rot (x);
+	andT = FbRot24Stip(and,rot);
+	xorT = FbRot24Stip(xor,rot);
+	FbMaskStip (x, 24, leftMask, nl, rightMask);
+	if (leftMask)
+	{
+	    WRITE(d, FbDoMaskRRop (READ(d), andT, xorT, leftMask));
+	    d++;
+	    andT = FbNext24Stip (andT);
+	    xorT = FbNext24Stip (xorT);
+	}
+	if (rightMask)
+	    WRITE(d, FbDoMaskRRop (READ(d), andT, xorT, rightMask));
+	if (axis == X_AXIS)
+	{
+	    x1 += signdx;
+	    e += e1;
+	    if (e >= 0)
+	    {
+		e += e3;
+		dst += dstStride;
+	    }
+	}
+	else
+	{
+	    dst += dstStride;
+	    e += e1;
+	    if (e >= 0)
+	    {
+		e += e3;
+		x1 += signdx;
+	    }
+	}
+    }
+
+    fbFinishAccess (pDrawable);
+}
+
+static void
+fbBresDash24RRop (DrawablePtr	pDrawable,
+		  GCPtr		pGC,
+		  int		dashOffset,
+		  int		signdx,
+		  int		signdy,
+		  int		axis,
+		  int		x1,
+		  int		y1,
+		  int		e,
+		  int		e1,
+		  int		e3,
+		  int		len)
+{
+    FbStip	*dst;
+    FbStride	dstStride;
+    int		dstBpp;
+    int		dstXoff, dstYoff;
+    FbGCPrivPtr	pPriv = fbGetGCPrivate (pGC);
+    FbStip	andT, xorT;
+    FbStip	fgand = pPriv->and;
+    FbStip	fgxor = pPriv->xor;
+    FbStip	bgand = pPriv->bgand;
+    FbStip	bgxor = pPriv->bgxor;
+    FbStip	leftMask, rightMask;
+    int		nl;
+    FbStip	*d;
+    int		x;
+    int		rot;
+    FbDashDeclare;
+    int		dashlen;
+    Bool	even;
+    Bool	doOdd;
+    
+    fbGetStipDrawable (pDrawable, dst, dstStride, dstBpp, dstXoff, dstYoff);
+    doOdd = pGC->lineStyle == LineDoubleDash;
+
+    /* compute current dash position */
+    FbDashInit(pGC, pPriv, dashOffset, dashlen, even);
+    
+    dst += ((y1 + dstYoff) * dstStride);
+    x1 = (x1 + dstXoff) * 24;
+    if (signdy < 0)
+	dstStride = -dstStride;
+    signdx *= 24;
+    while (len--)
+    {
+	if (even || doOdd)
+	{
+	    if (even)
+	    {
+		andT = fgand;
+		xorT = fgxor;
+	    }
+	    else
+	    {
+		andT = bgand;
+		xorT = bgxor;
+	    }
+	    d = dst + (x1 >> FB_STIP_SHIFT);
+	    x = x1 & FB_STIP_MASK;
+	    rot = FbFirst24Rot (x);
+	    andT = FbRot24Stip (andT, rot);
+	    xorT = FbRot24Stip (xorT, rot);
+	    FbMaskStip (x, 24, leftMask, nl, rightMask);
+	    if (leftMask)
+	    {
+		WRITE(d, FbDoMaskRRop (READ(d), andT, xorT, leftMask));
+		d++;
+		andT = FbNext24Stip (andT);
+		xorT = FbNext24Stip (xorT);
+	    }
+	    if (rightMask)
+		WRITE(d, FbDoMaskRRop (READ(d), andT, xorT, rightMask));
+	}
+	if (axis == X_AXIS)
+	{
+	    x1 += signdx;
+	    e += e1;
+	    if (e >= 0)
+	    {
+		e += e3;
+		dst += dstStride;
+	    }
+	}
+	else
+	{
+	    dst += dstStride;
+	    e += e1;
+	    if (e >= 0)
+	    {
+		e += e3;
+		x1 += signdx;
+	    }
+	}
+	FbDashStep (dashlen, even);
+    }
+
+    fbFinishAccess (pDrawable);
+}
+
+/*
+ * For drivers that want to bail drawing some lines, this
+ * function takes care of selecting the appropriate rasterizer
+ * based on the contents of the specified GC.
+ */
+
+FbBres *
+fbSelectBres (DrawablePtr   pDrawable,
+	      GCPtr	    pGC)
+{
+    FbGCPrivPtr	pPriv = fbGetGCPrivate(pGC);
+    int		dstBpp = pDrawable->bitsPerPixel;
+    FbBres *	bres;
+    
+    if (pGC->lineStyle == LineSolid)
+    {
+	bres = fbBresFill;
+	if (pGC->fillStyle == FillSolid)
+	{
+	    bres = fbBresSolid;
+	    if (dstBpp == 24)
+		bres = fbBresSolid24RRop;
+	    if (pPriv->and == 0)
+	    {
+		switch (dstBpp) {
+		case 8:	bres = fbBresSolid8; break;
+		case 16: bres = fbBresSolid16; break;
+		case 24: bres = fbBresSolid24; break;
+		case 32: bres = fbBresSolid32; break;
+		}
+	    }
+	}
+    }
+    else
+    {
+	bres = fbBresFillDash;
+	if (pGC->fillStyle == FillSolid)
+	{
+	    bres = fbBresDash;
+	    if (dstBpp == 24)
+		bres = fbBresDash24RRop;
+	    if (pPriv->and == 0 && 
+		(pGC->lineStyle == LineOnOffDash || pPriv->bgand == 0))
+	    {
+		switch (dstBpp) {
+		case 8:	bres = fbBresDash8; break;
+		case 16: bres = fbBresDash16; break;
+		case 24: bres = fbBresDash24; break;
+		case 32: bres = fbBresDash32; break;
+		}
+	    }
+	}
+    }
+    return bres;
+}
+
+void
+fbBres (DrawablePtr	pDrawable,
+	GCPtr		pGC,
+	int		dashOffset,
+	int		signdx,
+	int		signdy,
+	int		axis,
+	int		x1,
+	int		y1,
+	int		e,
+	int		e1,
+	int		e3,
+	int		len)
+{
+    (*fbSelectBres (pDrawable, pGC)) (pDrawable, pGC, dashOffset,
+				      signdx, signdy, axis, x1, y1,
+				      e, e1, e3, len);
+}
+
+void
+fbSegment (DrawablePtr	pDrawable,
+	   GCPtr	pGC,
+	   int		x1,
+	   int		y1,
+	   int		x2,
+	   int		y2,
+	   Bool		drawLast,
+	   int		*dashOffset)
+{
+    FbBres *	bres;
+    RegionPtr	pClip = fbGetCompositeClip(pGC);
+    BoxPtr	pBox;
+    int		nBox;
+    int		adx;		/* abs values of dx and dy */
+    int		ady;
+    int		signdx;		/* sign of dx and dy */
+    int		signdy;
+    int		e, e1, e2, e3;		/* bresenham error and increments */
+    int		len;			/* length of segment */
+    int		axis;			/* major axis */
+    int		octant;
+    int		dashoff;
+    int		doff;
+    unsigned int bias = miGetZeroLineBias(pDrawable->pScreen);
+    unsigned int oc1;	/* outcode of point 1 */
+    unsigned int oc2;	/* outcode of point 2 */
+
+    nBox = RegionNumRects (pClip);
+    pBox = RegionRects (pClip);
+    
+    bres = fbSelectBres (pDrawable, pGC);
+    
+    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;
+	len = adx;
+    }
+    else
+    {
+	axis = Y_AXIS;
+	e1 = adx << 1;
+	e2 = e1 - (ady << 1);
+	e = e1 - ady;
+	SetYMajorOctant(octant);
+	len = ady;
+    }
+
+    FIXUP_ERROR (e, octant, bias);
+    
+    /*
+     * Adjust error terms to compare against zero
+     */
+    e3 = e2 - e1;
+    e = e - e1;
+    
+    /* we have bresenham parameters and two points.
+       all we have to do now is clip and draw.
+    */
+
+    if (drawLast)
+	len++;
+    dashoff = *dashOffset;
+    *dashOffset = dashoff + len;
+    while(nBox--)
+    {
+	oc1 = 0;
+	oc2 = 0;
+	OUTCODES(oc1, x1, y1, pBox);
+	OUTCODES(oc2, x2, y2, pBox);
+	if ((oc1 | oc2) == 0)
+	{
+	    (*bres) (pDrawable, pGC, dashoff,
+		     signdx, signdy, axis, x1, y1,
+		     e, e1, e3, 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);
+	    if (clip2 != 0 || drawLast)
+		len++;
+	    if (len)
+	    {
+		/* unwind bresenham error term to first point */
+		doff = dashoff;
+		err = e;
+		if (clip1)
+		{
+		    clipdx = abs(new_x1 - x1);
+		    clipdy = abs(new_y1 - y1);
+		    if (axis == X_AXIS)
+		    {
+			doff += clipdx;
+			err  += e3 * clipdy + e1 * clipdx;
+		    }
+		    else
+		    {
+			doff += clipdy;
+			err  += e3 * clipdx + e1 * clipdy;
+		    }
+		}
+		(*bres) (pDrawable, pGC, doff,
+			 signdx, signdy, axis, new_x1, new_y1,
+			 err, e1, e3, len);
+	    }
+	    pBox++;
+	}
+    } /* while (nBox--) */
+}