R6.6 is the Xorg base-lineXORG-MAIN

1 files changed, 915 insertions, 0 deletions

diff --git a/cfb/cfb8line.c b/cfb/cfb8line.c
new file mode 100644
index 000000000..7a5f1ac5d
--- /dev/null
+++ b/cfb/cfb8line.c
@@ -0,0 +1,915 @@
+/*
+ * $Xorg: cfb8line.c,v 1.4 2001/02/09 02:04:37 xorgcvs Exp $
+ *
+Copyright 1990, 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.
+ *
+ * Author:  Keith Packard, MIT X Consortium
+ */
+
+#include "X.h"
+
+#include "gcstruct.h"
+#include "windowstr.h"
+#include "pixmapstr.h"
+#include "regionstr.h"
+#include "scrnintstr.h"
+#include "mistruct.h"
+
+#include "cfb.h"
+#include "cfbmskbits.h"
+#include "cfbrrop.h"
+#include "miline.h"
+
+#ifdef PIXEL_ADDR
+
+#if defined(__GNUC__) && defined(mc68020)
+#define STUPID volatile
+#define REARRANGE
+#else
+#define STUPID
+#endif
+
+#ifdef __GNUC__
+/* lame compiler doesn't even look at 'register' attributes */
+#define I_H do{
+#define I_T }while(0);
+#define IMPORTANT_START I_H I_H I_H I_H I_H I_H I_H I_H I_H I_H
+#define IMPORTANT_END	I_T I_T I_T I_T I_T I_T I_T I_T I_T I_T
+#else
+#define IMPORTANT_START
+#define IMPORTANT_END
+#endif
+
+#define isClipped(c,ul,lr)  ((((c) - (ul)) | ((lr) - (c))) & ClipMask)
+
+#ifdef POLYSEGMENT
+
+# ifdef sun
+#  define WIDTH_FAST  1152
+# endif
+
+# ifdef ultrix
+#  define WIDTH_FAST  1024
+# endif
+
+# ifdef Mips
+#  define WIDTH_FAST 4096
+# endif
+# ifdef WIDTH_FAST
+#  if WIDTH_FAST == 1024
+#   define FAST_MUL(y)	((y) << 10)
+#  endif
+
+#  if WIDTH_FAST == 1152
+#   define FAST_MUL(y)	(((y) << 10) + ((y) << 7))
+#  endif
+
+#  if WIDTH_FAST == 1280
+#   define FAST_MUL(y)	(((y) << 10) + ((y) << 8))
+#  endif
+
+#  if WIDTH_FAST == 2048
+#   define FAST_MUL(y)	((y) << 11)
+#  endif
+
+#  if WIDTH_FAST == 4096
+#   define FAST_MUL(y)	((y) << 12)
+#  endif
+# endif
+
+# if defined(WIDTH_SHIFT)
+#  ifdef FAST_MUL
+#   define FUNC_NAME(e)	    RROP_NAME(RROP_NAME_CAT(e,Shift))
+#   if RROP == GXcopy
+#    define INCLUDE_OTHERS
+#    define SERIOUS_UNROLLING
+#   endif
+#   define INCLUDE_DRAW
+#   define NWIDTH(nwidth)   WIDTH_FAST
+#   define WIDTH_MUL(y,w)   FAST_MUL(y)
+#  endif
+# else
+#  define FUNC_NAME(e)	    RROP_NAME(e)
+#  define WIDTH_MUL(y,w)    ((y) * (w))
+#  define NWIDTH(nwidth)    (nwidth)
+#  define INCLUDE_DRAW
+#  if !defined (FAST_MUL) && RROP == GXcopy
+#   define INCLUDE_OTHERS
+#   define SERIOUS_UNROLLING
+#  endif
+# endif
+#else
+
+# define INCLUDE_DRAW
+# define WIDTH_MUL(y,w)	((y) * (w))
+# define NWIDTH(nwidth)	nwidth
+# ifdef PREVIOUS
+#  define FUNC_NAME(e)	RROP_NAME(RROP_NAME_CAT(e,Previous))
+# else
+#  define FUNC_NAME(e)	RROP_NAME(e)
+#  if RROP == GXcopy
+#   define INCLUDE_OTHERS
+#   ifdef PLENTIFUL_REGISTERS
+#    define SAVE_X2Y2
+#   endif
+#   define ORIGIN
+#   define SERIOUS_UNROLLING
+#  else
+#   define EITHER_MODE
+#  endif
+# endif
+#endif
+
+#ifdef INCLUDE_DRAW
+
+int
+#ifdef POLYSEGMENT
+FUNC_NAME(cfb8SegmentSS1Rect) (pDrawable, pGC, nseg, pSegInit)
+    DrawablePtr	pDrawable;
+    GCPtr	pGC;
+    int		nseg;
+    xSegment	*pSegInit;
+#else
+FUNC_NAME(cfb8LineSS1Rect) (pDrawable, pGC, mode, npt, pptInit, pptInitOrig,
+			    x1p,y1p,x2p,y2p)
+    DrawablePtr pDrawable;
+    GCPtr	pGC;
+    int	mode;		/* Origin or Previous */
+    int	npt;		/* number of points */
+    DDXPointPtr pptInit, pptInitOrig;
+    int	*x1p, *y1p, *x2p, *y2p;
+#endif /* POLYSEGEMENT */
+{
+    register long   e;
+    register int    y1_or_e1;
+    register PixelType   *addrp;
+    register int    stepmajor;
+    register int    stepminor;
+#ifndef REARRANGE
+    register long   e3;
+#endif
+#ifdef mc68000
+    register short  x1_or_len;
+#else
+    register int    x1_or_len;
+#endif
+    RROP_DECLARE
+
+#ifdef SAVE_X2Y2
+# define c2 y2
+#else
+    register int    c2;
+#endif
+#ifndef ORIGIN
+    register int _x1, _y1, _x2, _y2;	/* only used for CoordModePrevious */
+    int extents_x1, extents_y1, extents_x2, extents_y2;
+#endif /* !ORIGIN */
+#ifndef PREVIOUS
+    register int upperleft, lowerright;
+    CARD32	 ClipMask = 0x80008000;
+#endif /* !PREVIOUS */
+#ifdef POLYSEGMENT
+    register int    capStyle;
+#endif /* POLYSEGMENT */
+#ifdef SAVE_X2Y2
+    register int    x2, y2;
+# define X1  x1_or_len
+# define Y1  y1_or_e1
+# define X2  x2
+# define Y2  y2
+#else
+# ifdef POLYSEGMENT
+#  define X1  x1_or_len
+#  define Y1  y1_or_e1
+# else
+#  define X1  intToX(y1_or_e1)
+#  define Y1  intToY(y1_or_e1)
+# endif /* POLYSEGMENT */
+# define X2  intToX(c2)
+# define Y2  intToY(c2)
+#endif /* SAVE_X2Y2 */
+    PixelType   *addr;
+    int		    nwidth;
+    cfbPrivGCPtr    devPriv;
+    BoxPtr	    extents;
+    int		    *ppt;
+    int		    octant;
+    unsigned int    bias = miGetZeroLineBias(pDrawable->pScreen);
+
+    devPriv = cfbGetGCPrivate(pGC);
+    cfbGetPixelWidthAndPointer (pDrawable, nwidth, addr);
+#ifndef REARRANGE
+    RROP_FETCH_GCPRIV(devPriv);
+#endif
+    extents = &devPriv->pCompositeClip->extents;
+#ifndef PREVIOUS
+    c2 = *((int *) &pDrawable->x);
+    c2 -= (c2 & 0x8000) << 1;
+    upperleft = *((int *) &extents->x1) - c2;
+    lowerright = *((int *) &extents->x2) - c2 - 0x00010001;
+#endif /* !PREVIOUS */
+    addr = addr + WIDTH_MUL(pDrawable->y,nwidth) + pDrawable->x;
+#ifdef POLYSEGMENT
+    capStyle = pGC->capStyle - CapNotLast;
+    ppt = (int *) pSegInit;
+    while (nseg--)
+#else /* POLYSEGMENT */
+#ifdef EITHER_MODE
+    mode -= CoordModePrevious;
+    if (!mode)
+#endif /* EITHER_MODE */	
+#ifndef ORIGIN
+    {	/* CoordModePrevious */
+	ppt = (int *)pptInit + 1;
+	_x1 = *x1p;
+	_y1 = *y1p;
+	extents_x1 = extents->x1 - pDrawable->x;
+	extents_x2 = extents->x2 - pDrawable->x;
+	extents_y1 = extents->y1 - pDrawable->y;
+	extents_y2 = extents->y2 - pDrawable->y;
+	if (_x1 < extents_x1 || _x1 >= extents_x2 ||
+	    _y1 < extents_y1 || _y1 >= extents_y2)
+	{
+	    c2 = *ppt++;
+	    intToCoord(c2, _x2, _y2);
+	    *x2p = _x1 + _x2;
+	    *y2p = _y1 + _y2;
+	    return 1;
+	}
+	addrp = addr + WIDTH_MUL(_y1, nwidth) + _x1;
+	_x2 = _x1;
+	_y2 = _y1;	
+    }
+#endif /* !ORIGIN */
+#ifdef EITHER_MODE
+    else
+#endif /* EITHER_MODE */
+#ifndef PREVIOUS
+    {
+	ppt = (int *) pptInit;
+	c2 = *ppt++;
+	if (isClipped (c2, upperleft, lowerright))
+	{
+	    return 1;
+	}
+#ifdef SAVE_X2Y2
+	intToCoord(c2,x2,y2);
+#endif
+	addrp = addr + WIDTH_MUL(Y2, nwidth) + X2;
+    }
+#endif /* !PREVIOUS */    
+    while (--npt)
+#endif /* POLYSEGMENT */
+    {
+#ifdef POLYSEGMENT
+	y1_or_e1 = ppt[0];
+	c2 = ppt[1];
+	ppt += 2;
+	if (isClipped(y1_or_e1,upperleft,lowerright)|isClipped(c2,upperleft,lowerright))
+	    break;
+	intToCoord(y1_or_e1,x1_or_len,y1_or_e1);
+	/* compute now to avoid needing x1, y1 later */
+	addrp = addr + WIDTH_MUL(y1_or_e1, nwidth) + x1_or_len;
+#else /* !POLYSEGMENT */
+#ifdef EITHER_MODE
+	if (!mode)
+#endif /* EITHER_MODE */	
+#ifndef ORIGIN
+	{	
+	    /* CoordModePrevious */
+	    _x1 = _x2;
+	    _y1 = _y2;
+	    c2 = *ppt++;
+	    intToCoord(c2, _x2, _y2);
+	    _x2 = _x1 + _x2;
+	    _y2 = _y1 + _y2;
+
+	    if (_x2 < extents_x1 || _x2 >= extents_x2 ||
+		_y2 < extents_y1 || _y2 >= extents_y2)
+	    {
+		break;
+	    }
+	    CalcLineDeltas(_x1, _y1, _x2, _y2, x1_or_len, y1_or_e1,
+			   stepmajor, stepminor, 1, NWIDTH(nwidth), octant);
+	}
+#endif /* !ORIGIN */
+#ifdef EITHER_MODE
+	else
+#endif /* EITHER_MODE */
+#ifndef PREVIOUS
+        {
+#ifndef SAVE_X2Y2
+	    y1_or_e1 = c2;
+#else
+	    y1_or_e1 = y2;
+	    x1_or_len = x2;
+#endif /* SAVE_X2Y2 */
+	    c2 = *ppt++;
+
+	    if (isClipped (c2, upperleft, lowerright))
+		break;
+#ifdef SAVE_X2Y2
+	    intToCoord(c2,x2,y2);
+#endif
+	    CalcLineDeltas(X1, Y1, X2, Y2, x1_or_len, y1_or_e1,
+			   stepmajor, stepminor, 1, NWIDTH(nwidth), octant);
+	}
+#endif /* !PREVIOUS */
+#endif /* POLYSEGMENT */
+
+#ifdef POLYSEGMENT
+	CalcLineDeltas(X1, Y1, X2, Y2, x1_or_len, y1_or_e1,
+		       stepmajor, stepminor, 1, NWIDTH(nwidth), octant);
+	/*
+	 * although the horizontal code works for polyline, it
+	 * slows down 10 pixel lines by 15%.  Thus, this
+	 * code is optimized for horizontal segments and
+	 * random orientation lines, which seems like a reasonable
+	 * assumption
+	 */
+	if (y1_or_e1 != 0)
+	{
+#endif /* POLYSEGMENT */
+	if (x1_or_len < y1_or_e1)
+	{
+#ifdef REARRANGE
+	    register int	e3;
+#endif
+
+	    e3 = x1_or_len;
+	    x1_or_len = y1_or_e1;
+	    y1_or_e1 = e3;
+
+	    e3 = stepminor;
+	    stepminor = stepmajor;
+	    stepmajor = e3;
+	    SetYMajorOctant(octant);
+	}
+
+	e = -x1_or_len;
+#ifdef POLYSEGMENT
+	if (!capStyle)
+	    x1_or_len--;
+#endif
+
+	{
+#ifdef REARRANGE
+	register int e3;
+	RROP_DECLARE
+	RROP_FETCH_GCPRIV(devPriv);
+#endif
+
+	y1_or_e1 = y1_or_e1 << 1;
+	e3 = e << 1;
+
+	FIXUP_ERROR(e, octant, bias);
+
+#define body {\
+	    RROP_SOLID(addrp); \
+	    addrp += stepmajor; \
+	    e += y1_or_e1; \
+	    if (e >= 0) \
+	    { \
+		addrp += stepminor; \
+		e += e3; \
+	     } \
+	}
+
+#ifdef LARGE_INSTRUCTION_CACHE
+
+# ifdef SERIOUS_UNROLLING
+#  define UNROLL	16
+# else
+#  define UNROLL	4
+# endif
+#define CASE(n)	case -n: body
+
+	while ((x1_or_len -= UNROLL) >= 0)
+	{
+	    body body body body
+# if UNROLL >= 8
+	    body body body body
+# endif
+# if UNROLL >= 12
+	    body body body body
+# endif
+# if UNROLL >= 16
+	    body body body body
+# endif
+	}
+	switch (x1_or_len)
+	{
+	CASE(1) CASE(2) CASE(3)
+# if UNROLL >= 8
+	CASE(4) CASE(5) CASE(6) CASE(7)
+# endif
+# if UNROLL >= 12
+	CASE(8) CASE(9) CASE(10) CASE(11)
+# endif
+# if UNROLL >= 16
+	CASE(12) CASE(13) CASE(14) CASE(15)
+# endif
+	}
+#else /* !LARGE_INSTRUCTION_CACHE */
+
+	IMPORTANT_START
+	IMPORTANT_START
+
+	if (x1_or_len & 1)
+	    body
+	x1_or_len >>= 1;
+	while (x1_or_len--) {
+	    body body
+	}
+
+	IMPORTANT_END
+	IMPORTANT_END
+#endif /* LARGE_INSTRUCTION_CACHE */
+
+#ifdef POLYSEGMENT
+	RROP_SOLID(addrp);
+#endif
+	}
+#undef body
+#ifdef POLYSEGMENT
+	}
+	else
+	{
+# ifdef REARRANGE
+	    register int    e3;
+	    RROP_DECLARE
+	    RROP_FETCH_GCPRIV(devPriv);
+# endif /* REARRANGE */
+	    if (stepmajor < 0)
+	    {
+		addrp -= x1_or_len;
+		if (capStyle)
+		    x1_or_len++;
+		else
+		    addrp++;
+	    }
+	    else
+	    {
+		if (capStyle)
+		    x1_or_len++;
+	    }
+	    y1_or_e1 = ((int) addrp) & PIM;
+	    addrp = (PixelType *) (((unsigned char *) addrp) - y1_or_e1);
+#if PGSZ == 32
+#  if PWSH != 2
+	    y1_or_e1 >>= (2 - PWSH);
+#  endif
+#else /* PGSZ == 64 */
+#  if PWSH != 3
+	    y1_or_e1 >>= (3 - PWSH);
+#  endif
+#endif /* PGSZ */
+	    if (y1_or_e1 + x1_or_len <= PPW)
+	    {
+		if (x1_or_len)
+		{
+		    maskpartialbits(y1_or_e1, x1_or_len, e)
+		    RROP_SOLID_MASK((unsigned long *) addrp, e);
+		}
+	    }
+	    else
+	    {
+	    	maskbits(y1_or_e1, x1_or_len, e, e3, x1_or_len)
+	    	if (e)
+	    	{
+		    RROP_SOLID_MASK((unsigned long *) addrp, e);
+		    addrp += PPW;
+	    	}
+		RROP_SPAN(addrp, x1_or_len)
+	    	if (e3)
+		    RROP_SOLID_MASK((unsigned long *) addrp, e3);
+	    }
+	}
+#endif /* POLYSEGMENT */
+    }
+#ifdef POLYSEGMENT
+    if (nseg >= 0)
+	return (xSegment *) ppt - pSegInit;
+#else
+    if (npt)
+    {
+#ifdef EITHER_MODE
+	if (!mode)
+#endif /* EITHER_MODE */
+#ifndef ORIGIN
+	{
+	    *x1p = _x1;
+	    *y1p = _y1;		
+	    *x2p = _x2;
+	    *y2p = _y2;
+	}
+#endif /* !ORIGIN */	    
+	return ((DDXPointPtr) ppt - pptInit) - 1;
+    }
+#endif /* POLYSEGMENT */
+
+#ifndef POLYSEGMENT
+# ifndef ORIGIN
+#  define C2  c2
+# else
+#  define C2  ppt[-1]
+# endif
+#ifdef EITHER_MODE
+    if (pGC->capStyle != CapNotLast &&
+	((mode ? (C2 != *((int *) pptInitOrig))
+	       : ((_x2 != pptInitOrig->x) ||
+		  (_y2 != pptInitOrig->y)))
+	 || (ppt == ((int *)pptInitOrig) + 2)))
+#endif /* EITHER_MODE */
+#ifdef PREVIOUS
+    if (pGC->capStyle != CapNotLast &&
+	((_x2 != pptInitOrig->x) ||
+	 (_y2 != pptInitOrig->y) ||
+	 (ppt == ((int *)pptInitOrig) + 2)))
+#endif /* PREVIOUS */
+#ifdef ORIGIN
+    if (pGC->capStyle != CapNotLast &&
+	((C2 != *((int *) pptInitOrig)) ||
+	 (ppt == ((int *)pptInitOrig) + 2)))
+#endif /* !PREVIOUS */
+    {
+# ifdef REARRANGE
+	RROP_DECLARE
+
+	RROP_FETCH_GCPRIV(devPriv);
+# endif
+	RROP_SOLID (addrp);
+    }
+#endif /* !POLYSEGMENT */
+    return -1;
+}
+
+#endif /* INCLUDE_DRAW */
+
+
+#ifdef INCLUDE_OTHERS
+
+#ifdef POLYSEGMENT
+
+void
+cfb8SegmentSS1Rect (pDrawable, pGC, nseg, pSegInit)
+    DrawablePtr	    pDrawable;
+    GCPtr	    pGC;
+    int		    nseg;
+    xSegment	    *pSegInit;
+{
+    int	    (*func)();
+    void    (*clip)();
+    int	    drawn;
+    cfbPrivGCPtr    devPriv;
+
+    devPriv = cfbGetGCPrivate(pGC);
+#ifdef NO_ONE_RECT
+    if (REGION_NUM_RECTS(devPriv->pCompositeClip) != 1)
+    {
+       cfbSegmentSS(pDrawable, pGC, nseg, pSegInit);
+       return;
+    }
+#endif
+    switch (devPriv->rop)
+    {
+    case GXcopy:
+	func = cfb8SegmentSS1RectCopy;
+	clip = cfb8ClippedLineCopy;
+#ifdef FAST_MUL
+	if (cfbGetPixelWidth (pDrawable) == WIDTH_FAST)
+	    func = cfb8SegmentSS1RectShiftCopy;
+#endif
+	break;
+    case GXxor:
+	func = cfb8SegmentSS1RectXor;
+	clip = cfb8ClippedLineXor;
+	break;
+    default:
+	func = cfb8SegmentSS1RectGeneral;
+	clip = cfb8ClippedLineGeneral;
+	break;
+    }
+    while (nseg)
+    {
+	drawn = (*func) (pDrawable, pGC, nseg, pSegInit);
+	if (drawn == -1)
+	    break;
+	(*clip) (pDrawable, pGC,
+			 pSegInit[drawn-1].x1, pSegInit[drawn-1].y1,
+			 pSegInit[drawn-1].x2, pSegInit[drawn-1].y2,
+			 &devPriv->pCompositeClip->extents,
+			 pGC->capStyle == CapNotLast);
+	pSegInit += drawn;
+	nseg -= drawn;
+    }
+}
+
+#else /* POLYSEGMENT */
+
+void
+cfb8LineSS1Rect (pDrawable, pGC, mode, npt, pptInit)
+    DrawablePtr	pDrawable;
+    GCPtr	pGC;
+    int		mode;
+    int		npt;
+    DDXPointPtr	pptInit;
+{
+    int	    (*func)();
+    void    (*clip)();
+    int	    drawn;
+    cfbPrivGCPtr    devPriv;
+    int x1, y1, x2, y2;
+    DDXPointPtr pptInitOrig = pptInit;
+
+    devPriv = cfbGetGCPrivate(pGC);
+#ifdef NO_ONE_RECT
+    if (REGION_NUM_RECTS(devPriv->pCompositeClip) != 1)
+    {
+       cfbLineSS(pDrawable, pGC, mode, npt, pptInit);
+       return;
+    }
+#endif
+    switch (devPriv->rop)
+    {
+    case GXcopy:
+	func = cfb8LineSS1RectCopy;
+	clip = cfb8ClippedLineCopy;
+	if (mode == CoordModePrevious)
+	    func = cfb8LineSS1RectPreviousCopy;
+	break;
+    case GXxor:
+	func = cfb8LineSS1RectXor;
+	clip = cfb8ClippedLineXor;
+	break;
+    default:
+	func = cfb8LineSS1RectGeneral;
+	clip = cfb8ClippedLineGeneral;
+	break;
+    }
+    if (mode == CoordModePrevious)
+    {
+	x1 = pptInit->x;
+	y1 = pptInit->y;
+	while (npt > 1)
+	{
+	    drawn = (*func) (pDrawable, pGC, mode, npt, pptInit, pptInitOrig,
+			     &x1, &y1, &x2, &y2);
+	    if (drawn == -1)
+		break;
+	    (*clip) (pDrawable, pGC, x1, y1, x2, y2,
+		     &devPriv->pCompositeClip->extents,
+		     drawn != npt - 1 || pGC->capStyle == CapNotLast);
+	    pptInit += drawn;
+	    npt -= drawn;
+	    x1 = x2;
+	    y1 = y2;
+	}
+    }
+    else
+    {
+	while (npt > 1)
+	{
+	    drawn = (*func) (pDrawable, pGC, mode, npt, pptInit, pptInitOrig,
+			     &x1, &y1, &x2, &y2);
+	    if (drawn == -1)
+		break;
+	    (*clip) (pDrawable, pGC,
+		     pptInit[drawn-1].x, pptInit[drawn-1].y,
+		     pptInit[drawn].x, pptInit[drawn].y,
+		     &devPriv->pCompositeClip->extents,
+		     drawn != npt - 1 || pGC->capStyle == CapNotLast);
+	    pptInit += drawn;
+	    npt -= drawn;
+	}
+    }
+}
+
+#endif /* else POLYSEGMENT */
+#endif /* INCLUDE_OTHERS */
+
+#if !defined(POLYSEGMENT) && !defined (PREVIOUS)
+
+void
+RROP_NAME (cfb8ClippedLine) (pDrawable, pGC, x1, y1, x2, y2, boxp, shorten)
+    DrawablePtr	pDrawable;
+    GCPtr	pGC;
+    int		x1, y1, x2, y2;
+    BoxPtr	boxp;
+    Bool	shorten;
+{
+    int		    oc1, oc2;
+    int		    e, e1, e3, len;
+    int		    adx, ady;
+
+    PixelType	    *addr;
+    int		    nwidth;
+    int		    stepx, stepy;
+    int		    xorg, yorg;
+    int             new_x1, new_y1, new_x2, new_y2;
+    Bool	    pt1_clipped, pt2_clipped;
+    int		    changex, changey, result;
+    int		    octant;
+    unsigned int    bias = miGetZeroLineBias(pDrawable->pScreen);
+
+    cfbGetPixelWidthAndPointer(pDrawable, nwidth, addr);
+
+    xorg = pDrawable->x;
+    yorg = pDrawable->y;
+    x1 += xorg;
+    y1 += yorg;
+    x2 += xorg;
+    y2 += yorg;
+    oc1 = 0;
+    oc2 = 0;
+    OUTCODES (oc1, x1, y1, boxp);
+    OUTCODES (oc2, x2, y2, boxp);
+
+    if (oc1 & oc2)
+	return;
+
+    CalcLineDeltas(x1, y1, x2, y2, adx, ady, stepx, stepy, 1, nwidth, octant);
+
+    if (adx <= ady)
+    {
+	int	t;
+
+	t = adx;
+	adx = ady;
+	ady = t;
+
+	t = stepx;
+	stepx = stepy;
+	stepy = t;
+	
+	SetYMajorOctant(octant);
+    }
+    e = - adx;
+    e1 = ady << 1;
+    e3 = - (adx << 1);
+
+    FIXUP_ERROR(e, octant, bias);
+
+    new_x1 = x1;
+    new_y1 = y1;
+    new_x2 = x2;
+    new_y2 = y2;
+    pt1_clipped = 0;
+    pt2_clipped = 0;
+
+    if (IsXMajorOctant(octant))
+    {
+	result = miZeroClipLine(boxp->x1, boxp->y1, boxp->x2 - 1, boxp->y2 - 1,
+				&new_x1, &new_y1, &new_x2, &new_y2,
+				adx, ady,
+				&pt1_clipped, &pt2_clipped,
+				octant, bias, oc1, oc2);
+	if (result == -1)
+	    return;
+	
+	len = abs(new_x2 - new_x1) - 1; /* this routine needs the "-1" */
+	
+	/* if we've clipped the endpoint, always draw the full length
+	 * of the segment, because then the capstyle doesn't matter 
+	 * if x2,y2 isn't clipped, use the capstyle
+	 * (shorten == TRUE <--> CapNotLast)
+	 */
+	if (pt2_clipped || !shorten)
+	    len++;
+	
+	if (pt1_clipped)
+	{
+	    /* must calculate new error terms */
+	    changex = abs(new_x1 - x1);
+	    changey = abs(new_y1 - y1);
+	    e = e + changey * e3 + changex * e1;	    
+	}
+    }
+    else /* Y_AXIS */
+    {
+	result = miZeroClipLine(boxp->x1, boxp->y1, boxp->x2 - 1, boxp->y2 - 1,
+				&new_x1, &new_y1, &new_x2, &new_y2,
+				ady, adx,
+				&pt1_clipped, &pt2_clipped,
+				octant, bias, oc1, oc2);
+	if (result == -1)
+	    return;
+	
+	len = abs(new_y2 - new_y1) - 1; /* this routine needs the "-1" */
+	
+	/* if we've clipped the endpoint, always draw the full length
+	 * of the segment, because then the capstyle doesn't matter 
+	 * if x2,y2 isn't clipped, use the capstyle
+	 * (shorten == TRUE <--> CapNotLast)
+	 */
+	if (pt2_clipped || !shorten)
+	    len++;
+	
+	if (pt1_clipped)
+	{
+	    /* must calculate new error terms */
+	    changex = abs(new_x1 - x1);
+	    changey = abs(new_y1 - y1);
+	    e = e + changex * e3 + changey * e1;
+	}
+    }
+    x1 = new_x1;
+    y1 = new_y1;
+    {
+    register PixelType	*addrp;
+    RROP_DECLARE
+
+    RROP_FETCH_GC(pGC);
+
+    addrp = addr + (y1 * nwidth) + x1;
+
+#ifndef REARRANGE
+    if (!ady)
+    {
+#define body	{ RROP_SOLID(addrp); addrp += stepx; }
+	while (len >= PGSZB)
+	{
+	    body body body body
+#if PGSZ == 64
+	    body body body body
+#endif
+	    len -= PGSZB;
+	}
+	switch (len)
+	{
+#if PGSZ == 64
+	case  7: body case 6: body case 5: body case 4: body
+#endif
+	case  3: body case 2: body case 1: body
+	}
+#undef body
+    }
+    else
+#endif /* !REARRANGE */
+    {
+#define body {\
+	    RROP_SOLID(addrp); \
+	    addrp += stepx; \
+	    e += e1; \
+	    if (e >= 0) \
+	    { \
+		addrp += stepy; \
+		e += e3; \
+	     } \
+	}
+
+#ifdef LARGE_INSTRUCTION_CACHE
+	while ((len -= PGSZB) >= 0)
+	{
+	    body body body body
+#if PGSZ == 64
+	    body body body body
+#endif
+	}
+	switch (len)
+	{
+	case  -1: body case -2: body case -3: body
+#if PGSZ == 64
+	case  -4: body case -5: body case -6: body case -7: body
+#endif
+	}
+#else /* !LARGE_INSTRUCTION_CACHE */
+	IMPORTANT_START;
+
+	while ((len -= 2) >= 0)
+	{
+	    body body;
+	}
+	if (len & 1)
+	    body;
+
+	IMPORTANT_END;
+#endif /* LARGE_INSTRUCTION_CACHE */
+    }
+    RROP_SOLID(addrp);
+#undef body
+    }
+}
+
+#endif /* !POLYSEGMENT && !PREVIOUS */
+#endif /* PIXEL_ADDR */