cfb8line.c

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	      *addrp = ((*addrp)&0xFF)|(piQxelXor[2] & 0xFFFFFF00);
	      break;
	    case 1:
	      *addrp = ((*addrp)&0xFFFFFF)|(piQxelXor[0] & 0xFF000000);
	      *(addrp+1) = ((*(addrp+1))&0xFFFF0000)|(piQxelXor[1] & 0xFFFF);
	      break;
	    case 2:
	      *addrp = ((*addrp)&0xFFFF)|(piQxelXor[1] & 0xFFFF0000);
	      *(addrp+1) = ((*(addrp+1))&0xFFFFFF00)|(piQxelXor[2] & 0xFF);
	      break;
	    }
#endif
#if RROP == GXxor
	    switch(xOffset & 3){
	    case 0:
	      *addrp ^= (piQxelXor[0] & 0xFFFFFF);
	      break;
	    case 3:
	      *addrp ^= (piQxelXor[2] & 0xFFFFFF00);
	      break;
	    case 1:
	      *addrp ^= (piQxelXor[0] & 0xFF000000);
	      *(addrp+1) ^= (piQxelXor[1] & 0xFFFF);
	      break;
	    case 2:
	      *addrp ^= (piQxelXor[1] & 0xFFFF0000);
	      *(addrp+1) ^= (piQxelXor[2] & 0xFF);
	      break;
	    }
#endif
#if RROP == GXand
	    switch(xOffset & 3){
	    case 0:
	      *addrp &= (piQxelAnd[0] | 0xFF000000);
	      break;
	    case 3:
	      *addrp &= (piQxelAnd[2] | 0xFF);
	      break;
	    case 1:
	      *addrp &= (0xFFFFFF|piQxelAnd[0]);
	      *(addrp+1) &= (0xFFFF0000|piQxelAnd[1]);
	      break;
	    case 2:
	      *addrp &= (0xFFFF|piQxelAnd[1]);
	      *(addrp+1) &= (0xFFFFFF00|piQxelAnd[2]);
	      break;
	    }
#endif
#if RROP == GXor
	    switch(xOffset & 3){
	    case 0:
	      *addrp |= (piQxelOr[0] & 0xFFFFFF);
	      break;
	    case 3:
	      *addrp |= (piQxelOr[2] & 0xFFFFFF00);
	      break;
	    case 1:
	      *addrp |= (piQxelOr[0] & 0xFF000000);
	      *(addrp+1) |= (piQxelOr[1] & 0xFFFF);
	      break;
	    case 2:
	      *addrp |= (piQxelOr[1] & 0xFFFF0000);
	      *(addrp+1) |= (piQxelOr[2] & 0xFF);
	      break;
	    }
#endif
#if RROP == GXset
	    switch(xOffset & 3){
	    case 0:
	      *addrp = (((*addrp)&(piQxelAnd[0] |0xFF000000))^(piQxelXor[0] & 0xFFFFFF));
	      break;
	    case 3:
	      *addrp = (((*addrp)&(piQxelAnd[2]|0xFF))^(piQxelXor[2] & 0xFFFFFF00));
	      break;
	    case 1:
	      *addrp = (((*addrp)&(piQxelAnd[0]|0xFFFFFF))^(piQxelXor[0] & 0xFF000000));
	      *(addrp+1) = (((*(addrp+1))&(piQxelAnd[1]|0xFFFF0000))^(piQxelXor[1] & 0xFFFF));
	      break;
	    case 2:
	      *addrp = (((*addrp)&(piQxelAnd[1]|0xFFFF))^(piQxelXor[1] & 0xFFFF0000));
	      *(addrp+1) = (((*(addrp+1))&(piQxelAnd[2]|0xFFFFFF00))^(piQxelXor[2] & 0xFF));
	      break;
	    } 
#endif
#else
	RROP_SOLID (addrp);
# endif
    }
#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;
#if PSZ == 24
    int xOffset;
    PixelType   *addrLineEnd;
    char *addrb;
    int stepx3, stepy3;
#endif
    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);

#if PSZ == 24
    xOffset = x1;
    addrLineEnd = addr + (y1 * nwidth);
    addrb = (char *)addrLineEnd + x1 * 3;
    if (stepx == 1  ||  stepx == -1){
      stepx3 = stepx * 3;
      stepy3 = stepy * sizeof (long);
    } else {
      stepx3 = stepx * sizeof (long);
      stepy3 = stepy * 3;
    }
#else
    addrp = addr + (y1 * nwidth) + x1;
#endif

#ifndef REARRANGE
    if (!ady)
    {
#if PSZ == 24
#define body {\
	    body_rop \
	    addrb += stepx3; \
	}
#else
#define body	{ RROP_SOLID(addrp); addrp += stepx; }
#endif
	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 */
    {
#if PSZ == 24
#define body {\
	    body_rop \
	    addrb += stepx3; \
	    e += e1; \
	    if (e >= 0) \
	    { \
		addrb += stepy3; \
		e += e3; \
	    } \
	}
#else
#define body {\
	    RROP_SOLID(addrp); \
	    addrp += stepx; \
	    e += e1; \
	    if (e >= 0) \
	    { \
		addrp += stepy; \
		e += e3; \
	     } \
	}
#endif

#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 */
    }
#if PSZ == 24
    body_rop
#else
    RROP_SOLID(addrp);
#endif
#undef body
    }
}

#endif /* !POLYSEGMENT && !PREVIOUS */
#endif /* PIXEL_ADDR */